View.java revision afaed06cda3473c3e182a48cf1a1a78c8a005055
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.view; 18 19import android.animation.AnimatorInflater; 20import android.animation.StateListAnimator; 21import android.annotation.CallSuper; 22import android.annotation.ColorInt; 23import android.annotation.DrawableRes; 24import android.annotation.FloatRange; 25import android.annotation.IdRes; 26import android.annotation.IntDef; 27import android.annotation.LayoutRes; 28import android.annotation.NonNull; 29import android.annotation.Nullable; 30import android.annotation.Size; 31import android.annotation.UiThread; 32import android.content.ClipData; 33import android.content.Context; 34import android.content.ContextWrapper; 35import android.content.Intent; 36import android.content.res.ColorStateList; 37import android.content.res.Configuration; 38import android.content.res.Resources; 39import android.content.res.TypedArray; 40import android.graphics.Bitmap; 41import android.graphics.Canvas; 42import android.graphics.Insets; 43import android.graphics.Interpolator; 44import android.graphics.LinearGradient; 45import android.graphics.Matrix; 46import android.graphics.Outline; 47import android.graphics.Paint; 48import android.graphics.PixelFormat; 49import android.graphics.Point; 50import android.graphics.PorterDuff; 51import android.graphics.PorterDuffXfermode; 52import android.graphics.Rect; 53import android.graphics.RectF; 54import android.graphics.Region; 55import android.graphics.Shader; 56import android.graphics.drawable.ColorDrawable; 57import android.graphics.drawable.Drawable; 58import android.hardware.display.DisplayManagerGlobal; 59import android.os.Build; 60import android.os.Build.VERSION_CODES; 61import android.os.Bundle; 62import android.os.Handler; 63import android.os.IBinder; 64import android.os.Parcel; 65import android.os.Parcelable; 66import android.os.RemoteException; 67import android.os.SystemClock; 68import android.os.SystemProperties; 69import android.os.Trace; 70import android.text.TextUtils; 71import android.util.AttributeSet; 72import android.util.FloatProperty; 73import android.util.LayoutDirection; 74import android.util.Log; 75import android.util.LongSparseLongArray; 76import android.util.Pools.SynchronizedPool; 77import android.util.Property; 78import android.util.SparseArray; 79import android.util.StateSet; 80import android.util.SuperNotCalledException; 81import android.util.TypedValue; 82import android.view.ContextMenu.ContextMenuInfo; 83import android.view.AccessibilityIterators.TextSegmentIterator; 84import android.view.AccessibilityIterators.CharacterTextSegmentIterator; 85import android.view.AccessibilityIterators.WordTextSegmentIterator; 86import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; 87import android.view.accessibility.AccessibilityEvent; 88import android.view.accessibility.AccessibilityEventSource; 89import android.view.accessibility.AccessibilityManager; 90import android.view.accessibility.AccessibilityNodeInfo; 91import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; 92import android.view.accessibility.AccessibilityNodeProvider; 93import android.view.animation.Animation; 94import android.view.animation.AnimationUtils; 95import android.view.animation.Transformation; 96import android.view.inputmethod.EditorInfo; 97import android.view.inputmethod.InputConnection; 98import android.view.inputmethod.InputMethodManager; 99import android.widget.Checkable; 100import android.widget.FrameLayout; 101import android.widget.ScrollBarDrawable; 102 103import static android.os.Build.VERSION_CODES.*; 104import static java.lang.Math.max; 105 106import com.android.internal.R; 107import com.android.internal.util.Predicate; 108import com.android.internal.view.menu.MenuBuilder; 109import com.google.android.collect.Lists; 110import com.google.android.collect.Maps; 111 112import java.lang.annotation.Retention; 113import java.lang.annotation.RetentionPolicy; 114import java.lang.ref.WeakReference; 115import java.lang.reflect.Field; 116import java.lang.reflect.InvocationTargetException; 117import java.lang.reflect.Method; 118import java.lang.reflect.Modifier; 119import java.util.ArrayList; 120import java.util.Arrays; 121import java.util.Collections; 122import java.util.HashMap; 123import java.util.List; 124import java.util.Locale; 125import java.util.Map; 126import java.util.concurrent.CopyOnWriteArrayList; 127import java.util.concurrent.atomic.AtomicInteger; 128 129/** 130 * <p> 131 * This class represents the basic building block for user interface components. A View 132 * occupies a rectangular area on the screen and is responsible for drawing and 133 * event handling. View is the base class for <em>widgets</em>, which are 134 * used to create interactive UI components (buttons, text fields, etc.). The 135 * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which 136 * are invisible containers that hold other Views (or other ViewGroups) and define 137 * their layout properties. 138 * </p> 139 * 140 * <div class="special reference"> 141 * <h3>Developer Guides</h3> 142 * <p>For information about using this class to develop your application's user interface, 143 * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. 144 * </div> 145 * 146 * <a name="Using"></a> 147 * <h3>Using Views</h3> 148 * <p> 149 * All of the views in a window are arranged in a single tree. You can add views 150 * either from code or by specifying a tree of views in one or more XML layout 151 * files. There are many specialized subclasses of views that act as controls or 152 * are capable of displaying text, images, or other content. 153 * </p> 154 * <p> 155 * Once you have created a tree of views, there are typically a few types of 156 * common operations you may wish to perform: 157 * <ul> 158 * <li><strong>Set properties:</strong> for example setting the text of a 159 * {@link android.widget.TextView}. The available properties and the methods 160 * that set them will vary among the different subclasses of views. Note that 161 * properties that are known at build time can be set in the XML layout 162 * files.</li> 163 * <li><strong>Set focus:</strong> The framework will handled moving focus in 164 * response to user input. To force focus to a specific view, call 165 * {@link #requestFocus}.</li> 166 * <li><strong>Set up listeners:</strong> Views allow clients to set listeners 167 * that will be notified when something interesting happens to the view. For 168 * example, all views will let you set a listener to be notified when the view 169 * gains or loses focus. You can register such a listener using 170 * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. 171 * Other view subclasses offer more specialized listeners. For example, a Button 172 * exposes a listener to notify clients when the button is clicked.</li> 173 * <li><strong>Set visibility:</strong> You can hide or show views using 174 * {@link #setVisibility(int)}.</li> 175 * </ul> 176 * </p> 177 * <p><em> 178 * Note: The Android framework is responsible for measuring, laying out and 179 * drawing views. You should not call methods that perform these actions on 180 * views yourself unless you are actually implementing a 181 * {@link android.view.ViewGroup}. 182 * </em></p> 183 * 184 * <a name="Lifecycle"></a> 185 * <h3>Implementing a Custom View</h3> 186 * 187 * <p> 188 * To implement a custom view, you will usually begin by providing overrides for 189 * some of the standard methods that the framework calls on all views. You do 190 * not need to override all of these methods. In fact, you can start by just 191 * overriding {@link #onDraw(android.graphics.Canvas)}. 192 * <table border="2" width="85%" align="center" cellpadding="5"> 193 * <thead> 194 * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> 195 * </thead> 196 * 197 * <tbody> 198 * <tr> 199 * <td rowspan="2">Creation</td> 200 * <td>Constructors</td> 201 * <td>There is a form of the constructor that are called when the view 202 * is created from code and a form that is called when the view is 203 * inflated from a layout file. The second form should parse and apply 204 * any attributes defined in the layout file. 205 * </td> 206 * </tr> 207 * <tr> 208 * <td><code>{@link #onFinishInflate()}</code></td> 209 * <td>Called after a view and all of its children has been inflated 210 * from XML.</td> 211 * </tr> 212 * 213 * <tr> 214 * <td rowspan="3">Layout</td> 215 * <td><code>{@link #onMeasure(int, int)}</code></td> 216 * <td>Called to determine the size requirements for this view and all 217 * of its children. 218 * </td> 219 * </tr> 220 * <tr> 221 * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> 222 * <td>Called when this view should assign a size and position to all 223 * of its children. 224 * </td> 225 * </tr> 226 * <tr> 227 * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> 228 * <td>Called when the size of this view has changed. 229 * </td> 230 * </tr> 231 * 232 * <tr> 233 * <td>Drawing</td> 234 * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> 235 * <td>Called when the view should render its content. 236 * </td> 237 * </tr> 238 * 239 * <tr> 240 * <td rowspan="4">Event processing</td> 241 * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> 242 * <td>Called when a new hardware key event occurs. 243 * </td> 244 * </tr> 245 * <tr> 246 * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> 247 * <td>Called when a hardware key up event occurs. 248 * </td> 249 * </tr> 250 * <tr> 251 * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> 252 * <td>Called when a trackball motion event occurs. 253 * </td> 254 * </tr> 255 * <tr> 256 * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> 257 * <td>Called when a touch screen motion event occurs. 258 * </td> 259 * </tr> 260 * 261 * <tr> 262 * <td rowspan="2">Focus</td> 263 * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> 264 * <td>Called when the view gains or loses focus. 265 * </td> 266 * </tr> 267 * 268 * <tr> 269 * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> 270 * <td>Called when the window containing the view gains or loses focus. 271 * </td> 272 * </tr> 273 * 274 * <tr> 275 * <td rowspan="3">Attaching</td> 276 * <td><code>{@link #onAttachedToWindow()}</code></td> 277 * <td>Called when the view is attached to a window. 278 * </td> 279 * </tr> 280 * 281 * <tr> 282 * <td><code>{@link #onDetachedFromWindow}</code></td> 283 * <td>Called when the view is detached from its window. 284 * </td> 285 * </tr> 286 * 287 * <tr> 288 * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> 289 * <td>Called when the visibility of the window containing the view 290 * has changed. 291 * </td> 292 * </tr> 293 * </tbody> 294 * 295 * </table> 296 * </p> 297 * 298 * <a name="IDs"></a> 299 * <h3>IDs</h3> 300 * Views may have an integer id associated with them. These ids are typically 301 * assigned in the layout XML files, and are used to find specific views within 302 * the view tree. A common pattern is to: 303 * <ul> 304 * <li>Define a Button in the layout file and assign it a unique ID. 305 * <pre> 306 * <Button 307 * android:id="@+id/my_button" 308 * android:layout_width="wrap_content" 309 * android:layout_height="wrap_content" 310 * android:text="@string/my_button_text"/> 311 * </pre></li> 312 * <li>From the onCreate method of an Activity, find the Button 313 * <pre class="prettyprint"> 314 * Button myButton = (Button) findViewById(R.id.my_button); 315 * </pre></li> 316 * </ul> 317 * <p> 318 * View IDs need not be unique throughout the tree, but it is good practice to 319 * ensure that they are at least unique within the part of the tree you are 320 * searching. 321 * </p> 322 * 323 * <a name="Position"></a> 324 * <h3>Position</h3> 325 * <p> 326 * The geometry of a view is that of a rectangle. A view has a location, 327 * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and 328 * two dimensions, expressed as a width and a height. The unit for location 329 * and dimensions is the pixel. 330 * </p> 331 * 332 * <p> 333 * It is possible to retrieve the location of a view by invoking the methods 334 * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, 335 * coordinate of the rectangle representing the view. The latter returns the 336 * top, or Y, coordinate of the rectangle representing the view. These methods 337 * both return the location of the view relative to its parent. For instance, 338 * when getLeft() returns 20, that means the view is located 20 pixels to the 339 * right of the left edge of its direct parent. 340 * </p> 341 * 342 * <p> 343 * In addition, several convenience methods are offered to avoid unnecessary 344 * computations, namely {@link #getRight()} and {@link #getBottom()}. 345 * These methods return the coordinates of the right and bottom edges of the 346 * rectangle representing the view. For instance, calling {@link #getRight()} 347 * is similar to the following computation: <code>getLeft() + getWidth()</code> 348 * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) 349 * </p> 350 * 351 * <a name="SizePaddingMargins"></a> 352 * <h3>Size, padding and margins</h3> 353 * <p> 354 * The size of a view is expressed with a width and a height. A view actually 355 * possess two pairs of width and height values. 356 * </p> 357 * 358 * <p> 359 * The first pair is known as <em>measured width</em> and 360 * <em>measured height</em>. These dimensions define how big a view wants to be 361 * within its parent (see <a href="#Layout">Layout</a> for more details.) The 362 * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} 363 * and {@link #getMeasuredHeight()}. 364 * </p> 365 * 366 * <p> 367 * The second pair is simply known as <em>width</em> and <em>height</em>, or 368 * sometimes <em>drawing width</em> and <em>drawing height</em>. These 369 * dimensions define the actual size of the view on screen, at drawing time and 370 * after layout. These values may, but do not have to, be different from the 371 * measured width and height. The width and height can be obtained by calling 372 * {@link #getWidth()} and {@link #getHeight()}. 373 * </p> 374 * 375 * <p> 376 * To measure its dimensions, a view takes into account its padding. The padding 377 * is expressed in pixels for the left, top, right and bottom parts of the view. 378 * Padding can be used to offset the content of the view by a specific amount of 379 * pixels. For instance, a left padding of 2 will push the view's content by 380 * 2 pixels to the right of the left edge. Padding can be set using the 381 * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} 382 * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, 383 * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, 384 * {@link #getPaddingEnd()}. 385 * </p> 386 * 387 * <p> 388 * Even though a view can define a padding, it does not provide any support for 389 * margins. However, view groups provide such a support. Refer to 390 * {@link android.view.ViewGroup} and 391 * {@link android.view.ViewGroup.MarginLayoutParams} for further information. 392 * </p> 393 * 394 * <a name="Layout"></a> 395 * <h3>Layout</h3> 396 * <p> 397 * Layout is a two pass process: a measure pass and a layout pass. The measuring 398 * pass is implemented in {@link #measure(int, int)} and is a top-down traversal 399 * of the view tree. Each view pushes dimension specifications down the tree 400 * during the recursion. At the end of the measure pass, every view has stored 401 * its measurements. The second pass happens in 402 * {@link #layout(int,int,int,int)} and is also top-down. During 403 * this pass each parent is responsible for positioning all of its children 404 * using the sizes computed in the measure pass. 405 * </p> 406 * 407 * <p> 408 * When a view's measure() method returns, its {@link #getMeasuredWidth()} and 409 * {@link #getMeasuredHeight()} values must be set, along with those for all of 410 * that view's descendants. A view's measured width and measured height values 411 * must respect the constraints imposed by the view's parents. This guarantees 412 * that at the end of the measure pass, all parents accept all of their 413 * children's measurements. A parent view may call measure() more than once on 414 * its children. For example, the parent may measure each child once with 415 * unspecified dimensions to find out how big they want to be, then call 416 * measure() on them again with actual numbers if the sum of all the children's 417 * unconstrained sizes is too big or too small. 418 * </p> 419 * 420 * <p> 421 * The measure pass uses two classes to communicate dimensions. The 422 * {@link MeasureSpec} class is used by views to tell their parents how they 423 * want to be measured and positioned. The base LayoutParams class just 424 * describes how big the view wants to be for both width and height. For each 425 * dimension, it can specify one of: 426 * <ul> 427 * <li> an exact number 428 * <li>MATCH_PARENT, which means the view wants to be as big as its parent 429 * (minus padding) 430 * <li> WRAP_CONTENT, which means that the view wants to be just big enough to 431 * enclose its content (plus padding). 432 * </ul> 433 * There are subclasses of LayoutParams for different subclasses of ViewGroup. 434 * For example, AbsoluteLayout has its own subclass of LayoutParams which adds 435 * an X and Y value. 436 * </p> 437 * 438 * <p> 439 * MeasureSpecs are used to push requirements down the tree from parent to 440 * child. A MeasureSpec can be in one of three modes: 441 * <ul> 442 * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension 443 * of a child view. For example, a LinearLayout may call measure() on its child 444 * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how 445 * tall the child view wants to be given a width of 240 pixels. 446 * <li>EXACTLY: This is used by the parent to impose an exact size on the 447 * child. The child must use this size, and guarantee that all of its 448 * descendants will fit within this size. 449 * <li>AT_MOST: This is used by the parent to impose a maximum size on the 450 * child. The child must guarantee that it and all of its descendants will fit 451 * within this size. 452 * </ul> 453 * </p> 454 * 455 * <p> 456 * To initiate a layout, call {@link #requestLayout}. This method is typically 457 * called by a view on itself when it believes that is can no longer fit within 458 * its current bounds. 459 * </p> 460 * 461 * <a name="Drawing"></a> 462 * <h3>Drawing</h3> 463 * <p> 464 * Drawing is handled by walking the tree and recording the drawing commands of 465 * any View that needs to update. After this, the drawing commands of the 466 * entire tree are issued to screen, clipped to the newly damaged area. 467 * </p> 468 * 469 * <p> 470 * The tree is largely recorded and drawn in order, with parents drawn before 471 * (i.e., behind) their children, with siblings drawn in the order they appear 472 * in the tree. If you set a background drawable for a View, then the View will 473 * draw it before calling back to its <code>onDraw()</code> method. The child 474 * drawing order can be overridden with 475 * {@link ViewGroup#setChildrenDrawingOrderEnabled(boolean) custom child drawing order} 476 * in a ViewGroup, and with {@link #setZ(float)} custom Z values} set on Views. 477 * </p> 478 * 479 * <p> 480 * To force a view to draw, call {@link #invalidate()}. 481 * </p> 482 * 483 * <a name="EventHandlingThreading"></a> 484 * <h3>Event Handling and Threading</h3> 485 * <p> 486 * The basic cycle of a view is as follows: 487 * <ol> 488 * <li>An event comes in and is dispatched to the appropriate view. The view 489 * handles the event and notifies any listeners.</li> 490 * <li>If in the course of processing the event, the view's bounds may need 491 * to be changed, the view will call {@link #requestLayout()}.</li> 492 * <li>Similarly, if in the course of processing the event the view's appearance 493 * may need to be changed, the view will call {@link #invalidate()}.</li> 494 * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, 495 * the framework will take care of measuring, laying out, and drawing the tree 496 * as appropriate.</li> 497 * </ol> 498 * </p> 499 * 500 * <p><em>Note: The entire view tree is single threaded. You must always be on 501 * the UI thread when calling any method on any view.</em> 502 * If you are doing work on other threads and want to update the state of a view 503 * from that thread, you should use a {@link Handler}. 504 * </p> 505 * 506 * <a name="FocusHandling"></a> 507 * <h3>Focus Handling</h3> 508 * <p> 509 * The framework will handle routine focus movement in response to user input. 510 * This includes changing the focus as views are removed or hidden, or as new 511 * views become available. Views indicate their willingness to take focus 512 * through the {@link #isFocusable} method. To change whether a view can take 513 * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) 514 * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} 515 * and can change this via {@link #setFocusableInTouchMode(boolean)}. 516 * </p> 517 * <p> 518 * Focus movement is based on an algorithm which finds the nearest neighbor in a 519 * given direction. In rare cases, the default algorithm may not match the 520 * intended behavior of the developer. In these situations, you can provide 521 * explicit overrides by using these XML attributes in the layout file: 522 * <pre> 523 * nextFocusDown 524 * nextFocusLeft 525 * nextFocusRight 526 * nextFocusUp 527 * </pre> 528 * </p> 529 * 530 * 531 * <p> 532 * To get a particular view to take focus, call {@link #requestFocus()}. 533 * </p> 534 * 535 * <a name="TouchMode"></a> 536 * <h3>Touch Mode</h3> 537 * <p> 538 * When a user is navigating a user interface via directional keys such as a D-pad, it is 539 * necessary to give focus to actionable items such as buttons so the user can see 540 * what will take input. If the device has touch capabilities, however, and the user 541 * begins interacting with the interface by touching it, it is no longer necessary to 542 * always highlight, or give focus to, a particular view. This motivates a mode 543 * for interaction named 'touch mode'. 544 * </p> 545 * <p> 546 * For a touch capable device, once the user touches the screen, the device 547 * will enter touch mode. From this point onward, only views for which 548 * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. 549 * Other views that are touchable, like buttons, will not take focus when touched; they will 550 * only fire the on click listeners. 551 * </p> 552 * <p> 553 * Any time a user hits a directional key, such as a D-pad direction, the view device will 554 * exit touch mode, and find a view to take focus, so that the user may resume interacting 555 * with the user interface without touching the screen again. 556 * </p> 557 * <p> 558 * The touch mode state is maintained across {@link android.app.Activity}s. Call 559 * {@link #isInTouchMode} to see whether the device is currently in touch mode. 560 * </p> 561 * 562 * <a name="Scrolling"></a> 563 * <h3>Scrolling</h3> 564 * <p> 565 * The framework provides basic support for views that wish to internally 566 * scroll their content. This includes keeping track of the X and Y scroll 567 * offset as well as mechanisms for drawing scrollbars. See 568 * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and 569 * {@link #awakenScrollBars()} for more details. 570 * </p> 571 * 572 * <a name="Tags"></a> 573 * <h3>Tags</h3> 574 * <p> 575 * Unlike IDs, tags are not used to identify views. Tags are essentially an 576 * extra piece of information that can be associated with a view. They are most 577 * often used as a convenience to store data related to views in the views 578 * themselves rather than by putting them in a separate structure. 579 * </p> 580 * 581 * <a name="Properties"></a> 582 * <h3>Properties</h3> 583 * <p> 584 * The View class exposes an {@link #ALPHA} property, as well as several transform-related 585 * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are 586 * available both in the {@link Property} form as well as in similarly-named setter/getter 587 * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can 588 * be used to set persistent state associated with these rendering-related properties on the view. 589 * The properties and methods can also be used in conjunction with 590 * {@link android.animation.Animator Animator}-based animations, described more in the 591 * <a href="#Animation">Animation</a> section. 592 * </p> 593 * 594 * <a name="Animation"></a> 595 * <h3>Animation</h3> 596 * <p> 597 * Starting with Android 3.0, the preferred way of animating views is to use the 598 * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based 599 * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and 600 * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 601 * {@link android.view.animation.Animation Animation}-based classes, which instead animate only 602 * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class 603 * makes animating these View properties particularly easy and efficient. 604 * </p> 605 * <p> 606 * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. 607 * You can attach an {@link Animation} object to a view using 608 * {@link #setAnimation(Animation)} or 609 * {@link #startAnimation(Animation)}. The animation can alter the scale, 610 * rotation, translation and alpha of a view over time. If the animation is 611 * attached to a view that has children, the animation will affect the entire 612 * subtree rooted by that node. When an animation is started, the framework will 613 * take care of redrawing the appropriate views until the animation completes. 614 * </p> 615 * 616 * <a name="Security"></a> 617 * <h3>Security</h3> 618 * <p> 619 * Sometimes it is essential that an application be able to verify that an action 620 * is being performed with the full knowledge and consent of the user, such as 621 * granting a permission request, making a purchase or clicking on an advertisement. 622 * Unfortunately, a malicious application could try to spoof the user into 623 * performing these actions, unaware, by concealing the intended purpose of the view. 624 * As a remedy, the framework offers a touch filtering mechanism that can be used to 625 * improve the security of views that provide access to sensitive functionality. 626 * </p><p> 627 * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the 628 * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework 629 * will discard touches that are received whenever the view's window is obscured by 630 * another visible window. As a result, the view will not receive touches whenever a 631 * toast, dialog or other window appears above the view's window. 632 * </p><p> 633 * For more fine-grained control over security, consider overriding the 634 * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own 635 * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. 636 * </p> 637 * 638 * @attr ref android.R.styleable#View_alpha 639 * @attr ref android.R.styleable#View_background 640 * @attr ref android.R.styleable#View_clickable 641 * @attr ref android.R.styleable#View_contentDescription 642 * @attr ref android.R.styleable#View_drawingCacheQuality 643 * @attr ref android.R.styleable#View_duplicateParentState 644 * @attr ref android.R.styleable#View_id 645 * @attr ref android.R.styleable#View_requiresFadingEdge 646 * @attr ref android.R.styleable#View_fadeScrollbars 647 * @attr ref android.R.styleable#View_fadingEdgeLength 648 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 649 * @attr ref android.R.styleable#View_fitsSystemWindows 650 * @attr ref android.R.styleable#View_isScrollContainer 651 * @attr ref android.R.styleable#View_focusable 652 * @attr ref android.R.styleable#View_focusableInTouchMode 653 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 654 * @attr ref android.R.styleable#View_keepScreenOn 655 * @attr ref android.R.styleable#View_layerType 656 * @attr ref android.R.styleable#View_layoutDirection 657 * @attr ref android.R.styleable#View_longClickable 658 * @attr ref android.R.styleable#View_minHeight 659 * @attr ref android.R.styleable#View_minWidth 660 * @attr ref android.R.styleable#View_nextFocusDown 661 * @attr ref android.R.styleable#View_nextFocusLeft 662 * @attr ref android.R.styleable#View_nextFocusRight 663 * @attr ref android.R.styleable#View_nextFocusUp 664 * @attr ref android.R.styleable#View_onClick 665 * @attr ref android.R.styleable#View_padding 666 * @attr ref android.R.styleable#View_paddingBottom 667 * @attr ref android.R.styleable#View_paddingLeft 668 * @attr ref android.R.styleable#View_paddingRight 669 * @attr ref android.R.styleable#View_paddingTop 670 * @attr ref android.R.styleable#View_paddingStart 671 * @attr ref android.R.styleable#View_paddingEnd 672 * @attr ref android.R.styleable#View_saveEnabled 673 * @attr ref android.R.styleable#View_rotation 674 * @attr ref android.R.styleable#View_rotationX 675 * @attr ref android.R.styleable#View_rotationY 676 * @attr ref android.R.styleable#View_scaleX 677 * @attr ref android.R.styleable#View_scaleY 678 * @attr ref android.R.styleable#View_scrollX 679 * @attr ref android.R.styleable#View_scrollY 680 * @attr ref android.R.styleable#View_scrollbarSize 681 * @attr ref android.R.styleable#View_scrollbarStyle 682 * @attr ref android.R.styleable#View_scrollbars 683 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 684 * @attr ref android.R.styleable#View_scrollbarFadeDuration 685 * @attr ref android.R.styleable#View_scrollbarTrackHorizontal 686 * @attr ref android.R.styleable#View_scrollbarThumbHorizontal 687 * @attr ref android.R.styleable#View_scrollbarThumbVertical 688 * @attr ref android.R.styleable#View_scrollbarTrackVertical 689 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack 690 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack 691 * @attr ref android.R.styleable#View_stateListAnimator 692 * @attr ref android.R.styleable#View_transitionName 693 * @attr ref android.R.styleable#View_soundEffectsEnabled 694 * @attr ref android.R.styleable#View_tag 695 * @attr ref android.R.styleable#View_textAlignment 696 * @attr ref android.R.styleable#View_textDirection 697 * @attr ref android.R.styleable#View_transformPivotX 698 * @attr ref android.R.styleable#View_transformPivotY 699 * @attr ref android.R.styleable#View_translationX 700 * @attr ref android.R.styleable#View_translationY 701 * @attr ref android.R.styleable#View_translationZ 702 * @attr ref android.R.styleable#View_visibility 703 * 704 * @see android.view.ViewGroup 705 */ 706@UiThread 707public class View implements Drawable.Callback, KeyEvent.Callback, 708 AccessibilityEventSource { 709 private static final boolean DBG = false; 710 711 /** 712 * The logging tag used by this class with android.util.Log. 713 */ 714 protected static final String VIEW_LOG_TAG = "View"; 715 716 /** 717 * When set to true, apps will draw debugging information about their layouts. 718 * 719 * @hide 720 */ 721 public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; 722 723 /** 724 * When set to true, this view will save its attribute data. 725 * 726 * @hide 727 */ 728 public static boolean mDebugViewAttributes = false; 729 730 /** 731 * Used to mark a View that has no ID. 732 */ 733 public static final int NO_ID = -1; 734 735 /** 736 * Signals that compatibility booleans have been initialized according to 737 * target SDK versions. 738 */ 739 private static boolean sCompatibilityDone = false; 740 741 /** 742 * Use the old (broken) way of building MeasureSpecs. 743 */ 744 private static boolean sUseBrokenMakeMeasureSpec = false; 745 746 /** 747 * Always return a size of 0 for MeasureSpec values with a mode of UNSPECIFIED 748 */ 749 static boolean sUseZeroUnspecifiedMeasureSpec = false; 750 751 /** 752 * Ignore any optimizations using the measure cache. 753 */ 754 private static boolean sIgnoreMeasureCache = false; 755 756 /** 757 * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when 758 * calling setFlags. 759 */ 760 private static final int NOT_FOCUSABLE = 0x00000000; 761 762 /** 763 * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling 764 * setFlags. 765 */ 766 private static final int FOCUSABLE = 0x00000001; 767 768 /** 769 * Mask for use with setFlags indicating bits used for focus. 770 */ 771 private static final int FOCUSABLE_MASK = 0x00000001; 772 773 /** 774 * This view will adjust its padding to fit sytem windows (e.g. status bar) 775 */ 776 private static final int FITS_SYSTEM_WINDOWS = 0x00000002; 777 778 /** @hide */ 779 @IntDef({VISIBLE, INVISIBLE, GONE}) 780 @Retention(RetentionPolicy.SOURCE) 781 public @interface Visibility {} 782 783 /** 784 * This view is visible. 785 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 786 * android:visibility}. 787 */ 788 public static final int VISIBLE = 0x00000000; 789 790 /** 791 * This view is invisible, but it still takes up space for layout purposes. 792 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 793 * android:visibility}. 794 */ 795 public static final int INVISIBLE = 0x00000004; 796 797 /** 798 * This view is invisible, and it doesn't take any space for layout 799 * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 800 * android:visibility}. 801 */ 802 public static final int GONE = 0x00000008; 803 804 /** 805 * Mask for use with setFlags indicating bits used for visibility. 806 * {@hide} 807 */ 808 static final int VISIBILITY_MASK = 0x0000000C; 809 810 private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; 811 812 /** 813 * This view is enabled. Interpretation varies by subclass. 814 * Use with ENABLED_MASK when calling setFlags. 815 * {@hide} 816 */ 817 static final int ENABLED = 0x00000000; 818 819 /** 820 * This view is disabled. Interpretation varies by subclass. 821 * Use with ENABLED_MASK when calling setFlags. 822 * {@hide} 823 */ 824 static final int DISABLED = 0x00000020; 825 826 /** 827 * Mask for use with setFlags indicating bits used for indicating whether 828 * this view is enabled 829 * {@hide} 830 */ 831 static final int ENABLED_MASK = 0x00000020; 832 833 /** 834 * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be 835 * called and further optimizations will be performed. It is okay to have 836 * this flag set and a background. Use with DRAW_MASK when calling setFlags. 837 * {@hide} 838 */ 839 static final int WILL_NOT_DRAW = 0x00000080; 840 841 /** 842 * Mask for use with setFlags indicating bits used for indicating whether 843 * this view is will draw 844 * {@hide} 845 */ 846 static final int DRAW_MASK = 0x00000080; 847 848 /** 849 * <p>This view doesn't show scrollbars.</p> 850 * {@hide} 851 */ 852 static final int SCROLLBARS_NONE = 0x00000000; 853 854 /** 855 * <p>This view shows horizontal scrollbars.</p> 856 * {@hide} 857 */ 858 static final int SCROLLBARS_HORIZONTAL = 0x00000100; 859 860 /** 861 * <p>This view shows vertical scrollbars.</p> 862 * {@hide} 863 */ 864 static final int SCROLLBARS_VERTICAL = 0x00000200; 865 866 /** 867 * <p>Mask for use with setFlags indicating bits used for indicating which 868 * scrollbars are enabled.</p> 869 * {@hide} 870 */ 871 static final int SCROLLBARS_MASK = 0x00000300; 872 873 /** 874 * Indicates that the view should filter touches when its window is obscured. 875 * Refer to the class comments for more information about this security feature. 876 * {@hide} 877 */ 878 static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; 879 880 /** 881 * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate 882 * that they are optional and should be skipped if the window has 883 * requested system UI flags that ignore those insets for layout. 884 */ 885 static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; 886 887 /** 888 * <p>This view doesn't show fading edges.</p> 889 * {@hide} 890 */ 891 static final int FADING_EDGE_NONE = 0x00000000; 892 893 /** 894 * <p>This view shows horizontal fading edges.</p> 895 * {@hide} 896 */ 897 static final int FADING_EDGE_HORIZONTAL = 0x00001000; 898 899 /** 900 * <p>This view shows vertical fading edges.</p> 901 * {@hide} 902 */ 903 static final int FADING_EDGE_VERTICAL = 0x00002000; 904 905 /** 906 * <p>Mask for use with setFlags indicating bits used for indicating which 907 * fading edges are enabled.</p> 908 * {@hide} 909 */ 910 static final int FADING_EDGE_MASK = 0x00003000; 911 912 /** 913 * <p>Indicates this view can be clicked. When clickable, a View reacts 914 * to clicks by notifying the OnClickListener.<p> 915 * {@hide} 916 */ 917 static final int CLICKABLE = 0x00004000; 918 919 /** 920 * <p>Indicates this view is caching its drawing into a bitmap.</p> 921 * {@hide} 922 */ 923 static final int DRAWING_CACHE_ENABLED = 0x00008000; 924 925 /** 926 * <p>Indicates that no icicle should be saved for this view.<p> 927 * {@hide} 928 */ 929 static final int SAVE_DISABLED = 0x000010000; 930 931 /** 932 * <p>Mask for use with setFlags indicating bits used for the saveEnabled 933 * property.</p> 934 * {@hide} 935 */ 936 static final int SAVE_DISABLED_MASK = 0x000010000; 937 938 /** 939 * <p>Indicates that no drawing cache should ever be created for this view.<p> 940 * {@hide} 941 */ 942 static final int WILL_NOT_CACHE_DRAWING = 0x000020000; 943 944 /** 945 * <p>Indicates this view can take / keep focus when int touch mode.</p> 946 * {@hide} 947 */ 948 static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; 949 950 /** @hide */ 951 @Retention(RetentionPolicy.SOURCE) 952 @IntDef({DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_AUTO}) 953 public @interface DrawingCacheQuality {} 954 955 /** 956 * <p>Enables low quality mode for the drawing cache.</p> 957 */ 958 public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; 959 960 /** 961 * <p>Enables high quality mode for the drawing cache.</p> 962 */ 963 public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; 964 965 /** 966 * <p>Enables automatic quality mode for the drawing cache.</p> 967 */ 968 public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; 969 970 private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { 971 DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH 972 }; 973 974 /** 975 * <p>Mask for use with setFlags indicating bits used for the cache 976 * quality property.</p> 977 * {@hide} 978 */ 979 static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; 980 981 /** 982 * <p> 983 * Indicates this view can be long clicked. When long clickable, a View 984 * reacts to long clicks by notifying the OnLongClickListener or showing a 985 * context menu. 986 * </p> 987 * {@hide} 988 */ 989 static final int LONG_CLICKABLE = 0x00200000; 990 991 /** 992 * <p>Indicates that this view gets its drawable states from its direct parent 993 * and ignores its original internal states.</p> 994 * 995 * @hide 996 */ 997 static final int DUPLICATE_PARENT_STATE = 0x00400000; 998 999 /** 1000 * <p> 1001 * Indicates this view can be context clicked. When context clickable, a View reacts to a 1002 * context click (e.g. a primary stylus button press or right mouse click) by notifying the 1003 * OnContextClickListener. 1004 * </p> 1005 * {@hide} 1006 */ 1007 static final int CONTEXT_CLICKABLE = 0x00800000; 1008 1009 1010 /** @hide */ 1011 @IntDef({ 1012 SCROLLBARS_INSIDE_OVERLAY, 1013 SCROLLBARS_INSIDE_INSET, 1014 SCROLLBARS_OUTSIDE_OVERLAY, 1015 SCROLLBARS_OUTSIDE_INSET 1016 }) 1017 @Retention(RetentionPolicy.SOURCE) 1018 public @interface ScrollBarStyle {} 1019 1020 /** 1021 * The scrollbar style to display the scrollbars inside the content area, 1022 * without increasing the padding. The scrollbars will be overlaid with 1023 * translucency on the view's content. 1024 */ 1025 public static final int SCROLLBARS_INSIDE_OVERLAY = 0; 1026 1027 /** 1028 * The scrollbar style to display the scrollbars inside the padded area, 1029 * increasing the padding of the view. The scrollbars will not overlap the 1030 * content area of the view. 1031 */ 1032 public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; 1033 1034 /** 1035 * The scrollbar style to display the scrollbars at the edge of the view, 1036 * without increasing the padding. The scrollbars will be overlaid with 1037 * translucency. 1038 */ 1039 public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; 1040 1041 /** 1042 * The scrollbar style to display the scrollbars at the edge of the view, 1043 * increasing the padding of the view. The scrollbars will only overlap the 1044 * background, if any. 1045 */ 1046 public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; 1047 1048 /** 1049 * Mask to check if the scrollbar style is overlay or inset. 1050 * {@hide} 1051 */ 1052 static final int SCROLLBARS_INSET_MASK = 0x01000000; 1053 1054 /** 1055 * Mask to check if the scrollbar style is inside or outside. 1056 * {@hide} 1057 */ 1058 static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; 1059 1060 /** 1061 * Mask for scrollbar style. 1062 * {@hide} 1063 */ 1064 static final int SCROLLBARS_STYLE_MASK = 0x03000000; 1065 1066 /** 1067 * View flag indicating that the screen should remain on while the 1068 * window containing this view is visible to the user. This effectively 1069 * takes care of automatically setting the WindowManager's 1070 * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. 1071 */ 1072 public static final int KEEP_SCREEN_ON = 0x04000000; 1073 1074 /** 1075 * View flag indicating whether this view should have sound effects enabled 1076 * for events such as clicking and touching. 1077 */ 1078 public static final int SOUND_EFFECTS_ENABLED = 0x08000000; 1079 1080 /** 1081 * View flag indicating whether this view should have haptic feedback 1082 * enabled for events such as long presses. 1083 */ 1084 public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; 1085 1086 /** 1087 * <p>Indicates that the view hierarchy should stop saving state when 1088 * it reaches this view. If state saving is initiated immediately at 1089 * the view, it will be allowed. 1090 * {@hide} 1091 */ 1092 static final int PARENT_SAVE_DISABLED = 0x20000000; 1093 1094 /** 1095 * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> 1096 * {@hide} 1097 */ 1098 static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; 1099 1100 /** @hide */ 1101 @IntDef(flag = true, 1102 value = { 1103 FOCUSABLES_ALL, 1104 FOCUSABLES_TOUCH_MODE 1105 }) 1106 @Retention(RetentionPolicy.SOURCE) 1107 public @interface FocusableMode {} 1108 1109 /** 1110 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1111 * should add all focusable Views regardless if they are focusable in touch mode. 1112 */ 1113 public static final int FOCUSABLES_ALL = 0x00000000; 1114 1115 /** 1116 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1117 * should add only Views focusable in touch mode. 1118 */ 1119 public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; 1120 1121 /** @hide */ 1122 @IntDef({ 1123 FOCUS_BACKWARD, 1124 FOCUS_FORWARD, 1125 FOCUS_LEFT, 1126 FOCUS_UP, 1127 FOCUS_RIGHT, 1128 FOCUS_DOWN 1129 }) 1130 @Retention(RetentionPolicy.SOURCE) 1131 public @interface FocusDirection {} 1132 1133 /** @hide */ 1134 @IntDef({ 1135 FOCUS_LEFT, 1136 FOCUS_UP, 1137 FOCUS_RIGHT, 1138 FOCUS_DOWN 1139 }) 1140 @Retention(RetentionPolicy.SOURCE) 1141 public @interface FocusRealDirection {} // Like @FocusDirection, but without forward/backward 1142 1143 /** 1144 * Use with {@link #focusSearch(int)}. Move focus to the previous selectable 1145 * item. 1146 */ 1147 public static final int FOCUS_BACKWARD = 0x00000001; 1148 1149 /** 1150 * Use with {@link #focusSearch(int)}. Move focus to the next selectable 1151 * item. 1152 */ 1153 public static final int FOCUS_FORWARD = 0x00000002; 1154 1155 /** 1156 * Use with {@link #focusSearch(int)}. Move focus to the left. 1157 */ 1158 public static final int FOCUS_LEFT = 0x00000011; 1159 1160 /** 1161 * Use with {@link #focusSearch(int)}. Move focus up. 1162 */ 1163 public static final int FOCUS_UP = 0x00000021; 1164 1165 /** 1166 * Use with {@link #focusSearch(int)}. Move focus to the right. 1167 */ 1168 public static final int FOCUS_RIGHT = 0x00000042; 1169 1170 /** 1171 * Use with {@link #focusSearch(int)}. Move focus down. 1172 */ 1173 public static final int FOCUS_DOWN = 0x00000082; 1174 1175 /** 1176 * Bits of {@link #getMeasuredWidthAndState()} and 1177 * {@link #getMeasuredWidthAndState()} that provide the actual measured size. 1178 */ 1179 public static final int MEASURED_SIZE_MASK = 0x00ffffff; 1180 1181 /** 1182 * Bits of {@link #getMeasuredWidthAndState()} and 1183 * {@link #getMeasuredWidthAndState()} that provide the additional state bits. 1184 */ 1185 public static final int MEASURED_STATE_MASK = 0xff000000; 1186 1187 /** 1188 * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits 1189 * for functions that combine both width and height into a single int, 1190 * such as {@link #getMeasuredState()} and the childState argument of 1191 * {@link #resolveSizeAndState(int, int, int)}. 1192 */ 1193 public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; 1194 1195 /** 1196 * Bit of {@link #getMeasuredWidthAndState()} and 1197 * {@link #getMeasuredWidthAndState()} that indicates the measured size 1198 * is smaller that the space the view would like to have. 1199 */ 1200 public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; 1201 1202 /** 1203 * Base View state sets 1204 */ 1205 // Singles 1206 /** 1207 * Indicates the view has no states set. States are used with 1208 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1209 * view depending on its state. 1210 * 1211 * @see android.graphics.drawable.Drawable 1212 * @see #getDrawableState() 1213 */ 1214 protected static final int[] EMPTY_STATE_SET; 1215 /** 1216 * Indicates the view is enabled. States are used with 1217 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1218 * view depending on its state. 1219 * 1220 * @see android.graphics.drawable.Drawable 1221 * @see #getDrawableState() 1222 */ 1223 protected static final int[] ENABLED_STATE_SET; 1224 /** 1225 * Indicates the view is focused. States are used with 1226 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1227 * view depending on its state. 1228 * 1229 * @see android.graphics.drawable.Drawable 1230 * @see #getDrawableState() 1231 */ 1232 protected static final int[] FOCUSED_STATE_SET; 1233 /** 1234 * Indicates the view is selected. States are used with 1235 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1236 * view depending on its state. 1237 * 1238 * @see android.graphics.drawable.Drawable 1239 * @see #getDrawableState() 1240 */ 1241 protected static final int[] SELECTED_STATE_SET; 1242 /** 1243 * Indicates the view is pressed. States are used with 1244 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1245 * view depending on its state. 1246 * 1247 * @see android.graphics.drawable.Drawable 1248 * @see #getDrawableState() 1249 */ 1250 protected static final int[] PRESSED_STATE_SET; 1251 /** 1252 * Indicates the view's window has focus. States are used with 1253 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1254 * view depending on its state. 1255 * 1256 * @see android.graphics.drawable.Drawable 1257 * @see #getDrawableState() 1258 */ 1259 protected static final int[] WINDOW_FOCUSED_STATE_SET; 1260 // Doubles 1261 /** 1262 * Indicates the view is enabled and has the focus. 1263 * 1264 * @see #ENABLED_STATE_SET 1265 * @see #FOCUSED_STATE_SET 1266 */ 1267 protected static final int[] ENABLED_FOCUSED_STATE_SET; 1268 /** 1269 * Indicates the view is enabled and selected. 1270 * 1271 * @see #ENABLED_STATE_SET 1272 * @see #SELECTED_STATE_SET 1273 */ 1274 protected static final int[] ENABLED_SELECTED_STATE_SET; 1275 /** 1276 * Indicates the view is enabled and that its window has focus. 1277 * 1278 * @see #ENABLED_STATE_SET 1279 * @see #WINDOW_FOCUSED_STATE_SET 1280 */ 1281 protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; 1282 /** 1283 * Indicates the view is focused and selected. 1284 * 1285 * @see #FOCUSED_STATE_SET 1286 * @see #SELECTED_STATE_SET 1287 */ 1288 protected static final int[] FOCUSED_SELECTED_STATE_SET; 1289 /** 1290 * Indicates the view has the focus and that its window has the focus. 1291 * 1292 * @see #FOCUSED_STATE_SET 1293 * @see #WINDOW_FOCUSED_STATE_SET 1294 */ 1295 protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; 1296 /** 1297 * Indicates the view is selected and that its window has the focus. 1298 * 1299 * @see #SELECTED_STATE_SET 1300 * @see #WINDOW_FOCUSED_STATE_SET 1301 */ 1302 protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; 1303 // Triples 1304 /** 1305 * Indicates the view is enabled, focused and selected. 1306 * 1307 * @see #ENABLED_STATE_SET 1308 * @see #FOCUSED_STATE_SET 1309 * @see #SELECTED_STATE_SET 1310 */ 1311 protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; 1312 /** 1313 * Indicates the view is enabled, focused and its window has the focus. 1314 * 1315 * @see #ENABLED_STATE_SET 1316 * @see #FOCUSED_STATE_SET 1317 * @see #WINDOW_FOCUSED_STATE_SET 1318 */ 1319 protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1320 /** 1321 * Indicates the view is enabled, selected and its window has the focus. 1322 * 1323 * @see #ENABLED_STATE_SET 1324 * @see #SELECTED_STATE_SET 1325 * @see #WINDOW_FOCUSED_STATE_SET 1326 */ 1327 protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1328 /** 1329 * Indicates the view is focused, selected and its window has the focus. 1330 * 1331 * @see #FOCUSED_STATE_SET 1332 * @see #SELECTED_STATE_SET 1333 * @see #WINDOW_FOCUSED_STATE_SET 1334 */ 1335 protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1336 /** 1337 * Indicates the view is enabled, focused, selected and its window 1338 * has the focus. 1339 * 1340 * @see #ENABLED_STATE_SET 1341 * @see #FOCUSED_STATE_SET 1342 * @see #SELECTED_STATE_SET 1343 * @see #WINDOW_FOCUSED_STATE_SET 1344 */ 1345 protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1346 /** 1347 * Indicates the view is pressed and its window has the focus. 1348 * 1349 * @see #PRESSED_STATE_SET 1350 * @see #WINDOW_FOCUSED_STATE_SET 1351 */ 1352 protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; 1353 /** 1354 * Indicates the view is pressed and selected. 1355 * 1356 * @see #PRESSED_STATE_SET 1357 * @see #SELECTED_STATE_SET 1358 */ 1359 protected static final int[] PRESSED_SELECTED_STATE_SET; 1360 /** 1361 * Indicates the view is pressed, selected and its window has the focus. 1362 * 1363 * @see #PRESSED_STATE_SET 1364 * @see #SELECTED_STATE_SET 1365 * @see #WINDOW_FOCUSED_STATE_SET 1366 */ 1367 protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1368 /** 1369 * Indicates the view is pressed and focused. 1370 * 1371 * @see #PRESSED_STATE_SET 1372 * @see #FOCUSED_STATE_SET 1373 */ 1374 protected static final int[] PRESSED_FOCUSED_STATE_SET; 1375 /** 1376 * Indicates the view is pressed, focused and its window has the focus. 1377 * 1378 * @see #PRESSED_STATE_SET 1379 * @see #FOCUSED_STATE_SET 1380 * @see #WINDOW_FOCUSED_STATE_SET 1381 */ 1382 protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1383 /** 1384 * Indicates the view is pressed, focused and selected. 1385 * 1386 * @see #PRESSED_STATE_SET 1387 * @see #SELECTED_STATE_SET 1388 * @see #FOCUSED_STATE_SET 1389 */ 1390 protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; 1391 /** 1392 * Indicates the view is pressed, focused, selected and its window has the focus. 1393 * 1394 * @see #PRESSED_STATE_SET 1395 * @see #FOCUSED_STATE_SET 1396 * @see #SELECTED_STATE_SET 1397 * @see #WINDOW_FOCUSED_STATE_SET 1398 */ 1399 protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1400 /** 1401 * Indicates the view is pressed and enabled. 1402 * 1403 * @see #PRESSED_STATE_SET 1404 * @see #ENABLED_STATE_SET 1405 */ 1406 protected static final int[] PRESSED_ENABLED_STATE_SET; 1407 /** 1408 * Indicates the view is pressed, enabled and its window has the focus. 1409 * 1410 * @see #PRESSED_STATE_SET 1411 * @see #ENABLED_STATE_SET 1412 * @see #WINDOW_FOCUSED_STATE_SET 1413 */ 1414 protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; 1415 /** 1416 * Indicates the view is pressed, enabled and selected. 1417 * 1418 * @see #PRESSED_STATE_SET 1419 * @see #ENABLED_STATE_SET 1420 * @see #SELECTED_STATE_SET 1421 */ 1422 protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; 1423 /** 1424 * Indicates the view is pressed, enabled, selected and its window has the 1425 * focus. 1426 * 1427 * @see #PRESSED_STATE_SET 1428 * @see #ENABLED_STATE_SET 1429 * @see #SELECTED_STATE_SET 1430 * @see #WINDOW_FOCUSED_STATE_SET 1431 */ 1432 protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1433 /** 1434 * Indicates the view is pressed, enabled and focused. 1435 * 1436 * @see #PRESSED_STATE_SET 1437 * @see #ENABLED_STATE_SET 1438 * @see #FOCUSED_STATE_SET 1439 */ 1440 protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; 1441 /** 1442 * Indicates the view is pressed, enabled, focused and its window has the 1443 * focus. 1444 * 1445 * @see #PRESSED_STATE_SET 1446 * @see #ENABLED_STATE_SET 1447 * @see #FOCUSED_STATE_SET 1448 * @see #WINDOW_FOCUSED_STATE_SET 1449 */ 1450 protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1451 /** 1452 * Indicates the view is pressed, enabled, focused and selected. 1453 * 1454 * @see #PRESSED_STATE_SET 1455 * @see #ENABLED_STATE_SET 1456 * @see #SELECTED_STATE_SET 1457 * @see #FOCUSED_STATE_SET 1458 */ 1459 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; 1460 /** 1461 * Indicates the view is pressed, enabled, focused, selected and its window 1462 * has the focus. 1463 * 1464 * @see #PRESSED_STATE_SET 1465 * @see #ENABLED_STATE_SET 1466 * @see #SELECTED_STATE_SET 1467 * @see #FOCUSED_STATE_SET 1468 * @see #WINDOW_FOCUSED_STATE_SET 1469 */ 1470 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1471 1472 static { 1473 EMPTY_STATE_SET = StateSet.get(0); 1474 1475 WINDOW_FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_WINDOW_FOCUSED); 1476 1477 SELECTED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_SELECTED); 1478 SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1479 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED); 1480 1481 FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_FOCUSED); 1482 FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1483 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED); 1484 FOCUSED_SELECTED_STATE_SET = StateSet.get( 1485 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED); 1486 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1487 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1488 | StateSet.VIEW_STATE_FOCUSED); 1489 1490 ENABLED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_ENABLED); 1491 ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1492 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED); 1493 ENABLED_SELECTED_STATE_SET = StateSet.get( 1494 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED); 1495 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1496 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1497 | StateSet.VIEW_STATE_ENABLED); 1498 ENABLED_FOCUSED_STATE_SET = StateSet.get( 1499 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED); 1500 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1501 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1502 | StateSet.VIEW_STATE_ENABLED); 1503 ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1504 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1505 | StateSet.VIEW_STATE_ENABLED); 1506 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1507 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1508 | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED); 1509 1510 PRESSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_PRESSED); 1511 PRESSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1512 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1513 PRESSED_SELECTED_STATE_SET = StateSet.get( 1514 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_PRESSED); 1515 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1516 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1517 | StateSet.VIEW_STATE_PRESSED); 1518 PRESSED_FOCUSED_STATE_SET = StateSet.get( 1519 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1520 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1521 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1522 | StateSet.VIEW_STATE_PRESSED); 1523 PRESSED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1524 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1525 | StateSet.VIEW_STATE_PRESSED); 1526 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1527 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1528 | StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1529 PRESSED_ENABLED_STATE_SET = StateSet.get( 1530 StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1531 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1532 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED 1533 | StateSet.VIEW_STATE_PRESSED); 1534 PRESSED_ENABLED_SELECTED_STATE_SET = StateSet.get( 1535 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED 1536 | StateSet.VIEW_STATE_PRESSED); 1537 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1538 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1539 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1540 PRESSED_ENABLED_FOCUSED_STATE_SET = StateSet.get( 1541 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED 1542 | StateSet.VIEW_STATE_PRESSED); 1543 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1544 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1545 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1546 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1547 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1548 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1549 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1550 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1551 | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED 1552 | StateSet.VIEW_STATE_PRESSED); 1553 } 1554 1555 /** 1556 * Accessibility event types that are dispatched for text population. 1557 */ 1558 private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = 1559 AccessibilityEvent.TYPE_VIEW_CLICKED 1560 | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED 1561 | AccessibilityEvent.TYPE_VIEW_SELECTED 1562 | AccessibilityEvent.TYPE_VIEW_FOCUSED 1563 | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED 1564 | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER 1565 | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT 1566 | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED 1567 | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED 1568 | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED 1569 | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; 1570 1571 /** 1572 * Temporary Rect currently for use in setBackground(). This will probably 1573 * be extended in the future to hold our own class with more than just 1574 * a Rect. :) 1575 */ 1576 static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); 1577 1578 /** 1579 * Map used to store views' tags. 1580 */ 1581 private SparseArray<Object> mKeyedTags; 1582 1583 /** 1584 * The next available accessibility id. 1585 */ 1586 private static int sNextAccessibilityViewId; 1587 1588 /** 1589 * The animation currently associated with this view. 1590 * @hide 1591 */ 1592 protected Animation mCurrentAnimation = null; 1593 1594 /** 1595 * Width as measured during measure pass. 1596 * {@hide} 1597 */ 1598 @ViewDebug.ExportedProperty(category = "measurement") 1599 int mMeasuredWidth; 1600 1601 /** 1602 * Height as measured during measure pass. 1603 * {@hide} 1604 */ 1605 @ViewDebug.ExportedProperty(category = "measurement") 1606 int mMeasuredHeight; 1607 1608 /** 1609 * Flag to indicate that this view was marked INVALIDATED, or had its display list 1610 * invalidated, prior to the current drawing iteration. If true, the view must re-draw 1611 * its display list. This flag, used only when hw accelerated, allows us to clear the 1612 * flag while retaining this information until it's needed (at getDisplayList() time and 1613 * in drawChild(), when we decide to draw a view's children's display lists into our own). 1614 * 1615 * {@hide} 1616 */ 1617 boolean mRecreateDisplayList = false; 1618 1619 /** 1620 * The view's identifier. 1621 * {@hide} 1622 * 1623 * @see #setId(int) 1624 * @see #getId() 1625 */ 1626 @IdRes 1627 @ViewDebug.ExportedProperty(resolveId = true) 1628 int mID = NO_ID; 1629 1630 /** 1631 * The stable ID of this view for accessibility purposes. 1632 */ 1633 int mAccessibilityViewId = NO_ID; 1634 1635 private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 1636 1637 SendViewStateChangedAccessibilityEvent mSendViewStateChangedAccessibilityEvent; 1638 1639 /** 1640 * The view's tag. 1641 * {@hide} 1642 * 1643 * @see #setTag(Object) 1644 * @see #getTag() 1645 */ 1646 protected Object mTag = null; 1647 1648 // for mPrivateFlags: 1649 /** {@hide} */ 1650 static final int PFLAG_WANTS_FOCUS = 0x00000001; 1651 /** {@hide} */ 1652 static final int PFLAG_FOCUSED = 0x00000002; 1653 /** {@hide} */ 1654 static final int PFLAG_SELECTED = 0x00000004; 1655 /** {@hide} */ 1656 static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; 1657 /** {@hide} */ 1658 static final int PFLAG_HAS_BOUNDS = 0x00000010; 1659 /** {@hide} */ 1660 static final int PFLAG_DRAWN = 0x00000020; 1661 /** 1662 * When this flag is set, this view is running an animation on behalf of its 1663 * children and should therefore not cancel invalidate requests, even if they 1664 * lie outside of this view's bounds. 1665 * 1666 * {@hide} 1667 */ 1668 static final int PFLAG_DRAW_ANIMATION = 0x00000040; 1669 /** {@hide} */ 1670 static final int PFLAG_SKIP_DRAW = 0x00000080; 1671 /** {@hide} */ 1672 static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; 1673 /** {@hide} */ 1674 static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; 1675 /** {@hide} */ 1676 static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; 1677 /** {@hide} */ 1678 static final int PFLAG_FORCE_LAYOUT = 0x00001000; 1679 /** {@hide} */ 1680 static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; 1681 1682 private static final int PFLAG_PRESSED = 0x00004000; 1683 1684 /** {@hide} */ 1685 static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; 1686 /** 1687 * Flag used to indicate that this view should be drawn once more (and only once 1688 * more) after its animation has completed. 1689 * {@hide} 1690 */ 1691 static final int PFLAG_ANIMATION_STARTED = 0x00010000; 1692 1693 private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; 1694 1695 /** 1696 * Indicates that the View returned true when onSetAlpha() was called and that 1697 * the alpha must be restored. 1698 * {@hide} 1699 */ 1700 static final int PFLAG_ALPHA_SET = 0x00040000; 1701 1702 /** 1703 * Set by {@link #setScrollContainer(boolean)}. 1704 */ 1705 static final int PFLAG_SCROLL_CONTAINER = 0x00080000; 1706 1707 /** 1708 * Set by {@link #setScrollContainer(boolean)}. 1709 */ 1710 static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; 1711 1712 /** 1713 * View flag indicating whether this view was invalidated (fully or partially.) 1714 * 1715 * @hide 1716 */ 1717 static final int PFLAG_DIRTY = 0x00200000; 1718 1719 /** 1720 * View flag indicating whether this view was invalidated by an opaque 1721 * invalidate request. 1722 * 1723 * @hide 1724 */ 1725 static final int PFLAG_DIRTY_OPAQUE = 0x00400000; 1726 1727 /** 1728 * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. 1729 * 1730 * @hide 1731 */ 1732 static final int PFLAG_DIRTY_MASK = 0x00600000; 1733 1734 /** 1735 * Indicates whether the background is opaque. 1736 * 1737 * @hide 1738 */ 1739 static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; 1740 1741 /** 1742 * Indicates whether the scrollbars are opaque. 1743 * 1744 * @hide 1745 */ 1746 static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; 1747 1748 /** 1749 * Indicates whether the view is opaque. 1750 * 1751 * @hide 1752 */ 1753 static final int PFLAG_OPAQUE_MASK = 0x01800000; 1754 1755 /** 1756 * Indicates a prepressed state; 1757 * the short time between ACTION_DOWN and recognizing 1758 * a 'real' press. Prepressed is used to recognize quick taps 1759 * even when they are shorter than ViewConfiguration.getTapTimeout(). 1760 * 1761 * @hide 1762 */ 1763 private static final int PFLAG_PREPRESSED = 0x02000000; 1764 1765 /** 1766 * Indicates whether the view is temporarily detached. 1767 * 1768 * @hide 1769 */ 1770 static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; 1771 1772 /** 1773 * Indicates that we should awaken scroll bars once attached 1774 * 1775 * PLEASE NOTE: This flag is now unused as we now send onVisibilityChanged 1776 * during window attachment and it is no longer needed. Feel free to repurpose it. 1777 * 1778 * @hide 1779 */ 1780 private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; 1781 1782 /** 1783 * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. 1784 * @hide 1785 */ 1786 private static final int PFLAG_HOVERED = 0x10000000; 1787 1788 /** 1789 * no longer needed, should be reused 1790 */ 1791 private static final int PFLAG_DOES_NOTHING_REUSE_PLEASE = 0x20000000; 1792 1793 /** {@hide} */ 1794 static final int PFLAG_ACTIVATED = 0x40000000; 1795 1796 /** 1797 * Indicates that this view was specifically invalidated, not just dirtied because some 1798 * child view was invalidated. The flag is used to determine when we need to recreate 1799 * a view's display list (as opposed to just returning a reference to its existing 1800 * display list). 1801 * 1802 * @hide 1803 */ 1804 static final int PFLAG_INVALIDATED = 0x80000000; 1805 1806 /** 1807 * Masks for mPrivateFlags2, as generated by dumpFlags(): 1808 * 1809 * |-------|-------|-------|-------| 1810 * 1 PFLAG2_DRAG_CAN_ACCEPT 1811 * 1 PFLAG2_DRAG_HOVERED 1812 * 11 PFLAG2_LAYOUT_DIRECTION_MASK 1813 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 1814 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED 1815 * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 1816 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] 1817 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] 1818 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] 1819 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] 1820 * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] 1821 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[6] 1822 * 111 PFLAG2_TEXT_DIRECTION_FLAGS[7] 1823 * 111 PFLAG2_TEXT_DIRECTION_MASK 1824 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED 1825 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT 1826 * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK 1827 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] 1828 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] 1829 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] 1830 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] 1831 * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] 1832 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] 1833 * 111 PFLAG2_TEXT_ALIGNMENT_MASK 1834 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED 1835 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT 1836 * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK 1837 * 111 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK 1838 * 11 PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK 1839 * 1 PFLAG2_ACCESSIBILITY_FOCUSED 1840 * 1 PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED 1841 * 1 PFLAG2_VIEW_QUICK_REJECTED 1842 * 1 PFLAG2_PADDING_RESOLVED 1843 * 1 PFLAG2_DRAWABLE_RESOLVED 1844 * 1 PFLAG2_HAS_TRANSIENT_STATE 1845 * |-------|-------|-------|-------| 1846 */ 1847 1848 /** 1849 * Indicates that this view has reported that it can accept the current drag's content. 1850 * Cleared when the drag operation concludes. 1851 * @hide 1852 */ 1853 static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; 1854 1855 /** 1856 * Indicates that this view is currently directly under the drag location in a 1857 * drag-and-drop operation involving content that it can accept. Cleared when 1858 * the drag exits the view, or when the drag operation concludes. 1859 * @hide 1860 */ 1861 static final int PFLAG2_DRAG_HOVERED = 0x00000002; 1862 1863 /** @hide */ 1864 @IntDef({ 1865 LAYOUT_DIRECTION_LTR, 1866 LAYOUT_DIRECTION_RTL, 1867 LAYOUT_DIRECTION_INHERIT, 1868 LAYOUT_DIRECTION_LOCALE 1869 }) 1870 @Retention(RetentionPolicy.SOURCE) 1871 // Not called LayoutDirection to avoid conflict with android.util.LayoutDirection 1872 public @interface LayoutDir {} 1873 1874 /** @hide */ 1875 @IntDef({ 1876 LAYOUT_DIRECTION_LTR, 1877 LAYOUT_DIRECTION_RTL 1878 }) 1879 @Retention(RetentionPolicy.SOURCE) 1880 public @interface ResolvedLayoutDir {} 1881 1882 /** 1883 * A flag to indicate that the layout direction of this view has not been defined yet. 1884 * @hide 1885 */ 1886 public static final int LAYOUT_DIRECTION_UNDEFINED = LayoutDirection.UNDEFINED; 1887 1888 /** 1889 * Horizontal layout direction of this view is from Left to Right. 1890 * Use with {@link #setLayoutDirection}. 1891 */ 1892 public static final int LAYOUT_DIRECTION_LTR = LayoutDirection.LTR; 1893 1894 /** 1895 * Horizontal layout direction of this view is from Right to Left. 1896 * Use with {@link #setLayoutDirection}. 1897 */ 1898 public static final int LAYOUT_DIRECTION_RTL = LayoutDirection.RTL; 1899 1900 /** 1901 * Horizontal layout direction of this view is inherited from its parent. 1902 * Use with {@link #setLayoutDirection}. 1903 */ 1904 public static final int LAYOUT_DIRECTION_INHERIT = LayoutDirection.INHERIT; 1905 1906 /** 1907 * Horizontal layout direction of this view is from deduced from the default language 1908 * script for the locale. Use with {@link #setLayoutDirection}. 1909 */ 1910 public static final int LAYOUT_DIRECTION_LOCALE = LayoutDirection.LOCALE; 1911 1912 /** 1913 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 1914 * @hide 1915 */ 1916 static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; 1917 1918 /** 1919 * Mask for use with private flags indicating bits used for horizontal layout direction. 1920 * @hide 1921 */ 1922 static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1923 1924 /** 1925 * Indicates whether the view horizontal layout direction has been resolved and drawn to the 1926 * right-to-left direction. 1927 * @hide 1928 */ 1929 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1930 1931 /** 1932 * Indicates whether the view horizontal layout direction has been resolved. 1933 * @hide 1934 */ 1935 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1936 1937 /** 1938 * Mask for use with private flags indicating bits used for resolved horizontal layout direction. 1939 * @hide 1940 */ 1941 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C 1942 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1943 1944 /* 1945 * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct 1946 * flag value. 1947 * @hide 1948 */ 1949 private static final int[] LAYOUT_DIRECTION_FLAGS = { 1950 LAYOUT_DIRECTION_LTR, 1951 LAYOUT_DIRECTION_RTL, 1952 LAYOUT_DIRECTION_INHERIT, 1953 LAYOUT_DIRECTION_LOCALE 1954 }; 1955 1956 /** 1957 * Default horizontal layout direction. 1958 */ 1959 private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; 1960 1961 /** 1962 * Default horizontal layout direction. 1963 * @hide 1964 */ 1965 static final int LAYOUT_DIRECTION_RESOLVED_DEFAULT = LAYOUT_DIRECTION_LTR; 1966 1967 /** 1968 * Text direction is inherited through {@link ViewGroup} 1969 */ 1970 public static final int TEXT_DIRECTION_INHERIT = 0; 1971 1972 /** 1973 * Text direction is using "first strong algorithm". The first strong directional character 1974 * determines the paragraph direction. If there is no strong directional character, the 1975 * paragraph direction is the view's resolved layout direction. 1976 */ 1977 public static final int TEXT_DIRECTION_FIRST_STRONG = 1; 1978 1979 /** 1980 * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains 1981 * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. 1982 * If there are neither, the paragraph direction is the view's resolved layout direction. 1983 */ 1984 public static final int TEXT_DIRECTION_ANY_RTL = 2; 1985 1986 /** 1987 * Text direction is forced to LTR. 1988 */ 1989 public static final int TEXT_DIRECTION_LTR = 3; 1990 1991 /** 1992 * Text direction is forced to RTL. 1993 */ 1994 public static final int TEXT_DIRECTION_RTL = 4; 1995 1996 /** 1997 * Text direction is coming from the system Locale. 1998 */ 1999 public static final int TEXT_DIRECTION_LOCALE = 5; 2000 2001 /** 2002 * Text direction is using "first strong algorithm". The first strong directional character 2003 * determines the paragraph direction. If there is no strong directional character, the 2004 * paragraph direction is LTR. 2005 */ 2006 public static final int TEXT_DIRECTION_FIRST_STRONG_LTR = 6; 2007 2008 /** 2009 * Text direction is using "first strong algorithm". The first strong directional character 2010 * determines the paragraph direction. If there is no strong directional character, the 2011 * paragraph direction is RTL. 2012 */ 2013 public static final int TEXT_DIRECTION_FIRST_STRONG_RTL = 7; 2014 2015 /** 2016 * Default text direction is inherited 2017 */ 2018 private static final int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; 2019 2020 /** 2021 * Default resolved text direction 2022 * @hide 2023 */ 2024 static final int TEXT_DIRECTION_RESOLVED_DEFAULT = TEXT_DIRECTION_FIRST_STRONG; 2025 2026 /** 2027 * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) 2028 * @hide 2029 */ 2030 static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; 2031 2032 /** 2033 * Mask for use with private flags indicating bits used for text direction. 2034 * @hide 2035 */ 2036 static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 2037 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2038 2039 /** 2040 * Array of text direction flags for mapping attribute "textDirection" to correct 2041 * flag value. 2042 * @hide 2043 */ 2044 private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { 2045 TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2046 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2047 TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2048 TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2049 TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2050 TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2051 TEXT_DIRECTION_FIRST_STRONG_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2052 TEXT_DIRECTION_FIRST_STRONG_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT 2053 }; 2054 2055 /** 2056 * Indicates whether the view text direction has been resolved. 2057 * @hide 2058 */ 2059 static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 2060 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2061 2062 /** 2063 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2064 * @hide 2065 */ 2066 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; 2067 2068 /** 2069 * Mask for use with private flags indicating bits used for resolved text direction. 2070 * @hide 2071 */ 2072 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 2073 << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2074 2075 /** 2076 * Indicates whether the view text direction has been resolved to the "first strong" heuristic. 2077 * @hide 2078 */ 2079 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = 2080 TEXT_DIRECTION_RESOLVED_DEFAULT << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2081 2082 /** @hide */ 2083 @IntDef({ 2084 TEXT_ALIGNMENT_INHERIT, 2085 TEXT_ALIGNMENT_GRAVITY, 2086 TEXT_ALIGNMENT_CENTER, 2087 TEXT_ALIGNMENT_TEXT_START, 2088 TEXT_ALIGNMENT_TEXT_END, 2089 TEXT_ALIGNMENT_VIEW_START, 2090 TEXT_ALIGNMENT_VIEW_END 2091 }) 2092 @Retention(RetentionPolicy.SOURCE) 2093 public @interface TextAlignment {} 2094 2095 /** 2096 * Default text alignment. The text alignment of this View is inherited from its parent. 2097 * Use with {@link #setTextAlignment(int)} 2098 */ 2099 public static final int TEXT_ALIGNMENT_INHERIT = 0; 2100 2101 /** 2102 * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, 2103 * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph’s text direction. 2104 * 2105 * Use with {@link #setTextAlignment(int)} 2106 */ 2107 public static final int TEXT_ALIGNMENT_GRAVITY = 1; 2108 2109 /** 2110 * Align to the start of the paragraph, e.g. ALIGN_NORMAL. 2111 * 2112 * Use with {@link #setTextAlignment(int)} 2113 */ 2114 public static final int TEXT_ALIGNMENT_TEXT_START = 2; 2115 2116 /** 2117 * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. 2118 * 2119 * Use with {@link #setTextAlignment(int)} 2120 */ 2121 public static final int TEXT_ALIGNMENT_TEXT_END = 3; 2122 2123 /** 2124 * Center the paragraph, e.g. ALIGN_CENTER. 2125 * 2126 * Use with {@link #setTextAlignment(int)} 2127 */ 2128 public static final int TEXT_ALIGNMENT_CENTER = 4; 2129 2130 /** 2131 * Align to the start of the view, which is ALIGN_LEFT if the view’s resolved 2132 * layoutDirection is LTR, and ALIGN_RIGHT otherwise. 2133 * 2134 * Use with {@link #setTextAlignment(int)} 2135 */ 2136 public static final int TEXT_ALIGNMENT_VIEW_START = 5; 2137 2138 /** 2139 * Align to the end of the view, which is ALIGN_RIGHT if the view’s resolved 2140 * layoutDirection is LTR, and ALIGN_LEFT otherwise. 2141 * 2142 * Use with {@link #setTextAlignment(int)} 2143 */ 2144 public static final int TEXT_ALIGNMENT_VIEW_END = 6; 2145 2146 /** 2147 * Default text alignment is inherited 2148 */ 2149 private static final int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2150 2151 /** 2152 * Default resolved text alignment 2153 * @hide 2154 */ 2155 static final int TEXT_ALIGNMENT_RESOLVED_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2156 2157 /** 2158 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2159 * @hide 2160 */ 2161 static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; 2162 2163 /** 2164 * Mask for use with private flags indicating bits used for text alignment. 2165 * @hide 2166 */ 2167 static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2168 2169 /** 2170 * Array of text direction flags for mapping attribute "textAlignment" to correct 2171 * flag value. 2172 * @hide 2173 */ 2174 private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { 2175 TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2176 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2177 TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2178 TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2179 TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2180 TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2181 TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 2182 }; 2183 2184 /** 2185 * Indicates whether the view text alignment has been resolved. 2186 * @hide 2187 */ 2188 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2189 2190 /** 2191 * Bit shift to get the resolved text alignment. 2192 * @hide 2193 */ 2194 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; 2195 2196 /** 2197 * Mask for use with private flags indicating bits used for text alignment. 2198 * @hide 2199 */ 2200 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 2201 << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2202 2203 /** 2204 * Indicates whether if the view text alignment has been resolved to gravity 2205 */ 2206 private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = 2207 TEXT_ALIGNMENT_RESOLVED_DEFAULT << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2208 2209 // Accessiblity constants for mPrivateFlags2 2210 2211 /** 2212 * Shift for the bits in {@link #mPrivateFlags2} related to the 2213 * "importantForAccessibility" attribute. 2214 */ 2215 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; 2216 2217 /** 2218 * Automatically determine whether a view is important for accessibility. 2219 */ 2220 public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; 2221 2222 /** 2223 * The view is important for accessibility. 2224 */ 2225 public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; 2226 2227 /** 2228 * The view is not important for accessibility. 2229 */ 2230 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; 2231 2232 /** 2233 * The view is not important for accessibility, nor are any of its 2234 * descendant views. 2235 */ 2236 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 0x00000004; 2237 2238 /** 2239 * The default whether the view is important for accessibility. 2240 */ 2241 static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; 2242 2243 /** 2244 * Mask for obtainig the bits which specify how to determine 2245 * whether a view is important for accessibility. 2246 */ 2247 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO 2248 | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO 2249 | IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) 2250 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2251 2252 /** 2253 * Shift for the bits in {@link #mPrivateFlags2} related to the 2254 * "accessibilityLiveRegion" attribute. 2255 */ 2256 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT = 23; 2257 2258 /** 2259 * Live region mode specifying that accessibility services should not 2260 * automatically announce changes to this view. This is the default live 2261 * region mode for most views. 2262 * <p> 2263 * Use with {@link #setAccessibilityLiveRegion(int)}. 2264 */ 2265 public static final int ACCESSIBILITY_LIVE_REGION_NONE = 0x00000000; 2266 2267 /** 2268 * Live region mode specifying that accessibility services should announce 2269 * changes to this view. 2270 * <p> 2271 * Use with {@link #setAccessibilityLiveRegion(int)}. 2272 */ 2273 public static final int ACCESSIBILITY_LIVE_REGION_POLITE = 0x00000001; 2274 2275 /** 2276 * Live region mode specifying that accessibility services should interrupt 2277 * ongoing speech to immediately announce changes to this view. 2278 * <p> 2279 * Use with {@link #setAccessibilityLiveRegion(int)}. 2280 */ 2281 public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 0x00000002; 2282 2283 /** 2284 * The default whether the view is important for accessibility. 2285 */ 2286 static final int ACCESSIBILITY_LIVE_REGION_DEFAULT = ACCESSIBILITY_LIVE_REGION_NONE; 2287 2288 /** 2289 * Mask for obtaining the bits which specify a view's accessibility live 2290 * region mode. 2291 */ 2292 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK = (ACCESSIBILITY_LIVE_REGION_NONE 2293 | ACCESSIBILITY_LIVE_REGION_POLITE | ACCESSIBILITY_LIVE_REGION_ASSERTIVE) 2294 << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 2295 2296 /** 2297 * Flag indicating whether a view has accessibility focus. 2298 */ 2299 static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x04000000; 2300 2301 /** 2302 * Flag whether the accessibility state of the subtree rooted at this view changed. 2303 */ 2304 static final int PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED = 0x08000000; 2305 2306 /** 2307 * Flag indicating whether a view failed the quickReject() check in draw(). This condition 2308 * is used to check whether later changes to the view's transform should invalidate the 2309 * view to force the quickReject test to run again. 2310 */ 2311 static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; 2312 2313 /** 2314 * Flag indicating that start/end padding has been resolved into left/right padding 2315 * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} 2316 * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved 2317 * during measurement. In some special cases this is required such as when an adapter-based 2318 * view measures prospective children without attaching them to a window. 2319 */ 2320 static final int PFLAG2_PADDING_RESOLVED = 0x20000000; 2321 2322 /** 2323 * Flag indicating that the start/end drawables has been resolved into left/right ones. 2324 */ 2325 static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; 2326 2327 /** 2328 * Indicates that the view is tracking some sort of transient state 2329 * that the app should not need to be aware of, but that the framework 2330 * should take special care to preserve. 2331 */ 2332 static final int PFLAG2_HAS_TRANSIENT_STATE = 0x80000000; 2333 2334 /** 2335 * Group of bits indicating that RTL properties resolution is done. 2336 */ 2337 static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | 2338 PFLAG2_TEXT_DIRECTION_RESOLVED | 2339 PFLAG2_TEXT_ALIGNMENT_RESOLVED | 2340 PFLAG2_PADDING_RESOLVED | 2341 PFLAG2_DRAWABLE_RESOLVED; 2342 2343 // There are a couple of flags left in mPrivateFlags2 2344 2345 /* End of masks for mPrivateFlags2 */ 2346 2347 /** 2348 * Masks for mPrivateFlags3, as generated by dumpFlags(): 2349 * 2350 * |-------|-------|-------|-------| 2351 * 1 PFLAG3_VIEW_IS_ANIMATING_TRANSFORM 2352 * 1 PFLAG3_VIEW_IS_ANIMATING_ALPHA 2353 * 1 PFLAG3_IS_LAID_OUT 2354 * 1 PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT 2355 * 1 PFLAG3_CALLED_SUPER 2356 * 1 PFLAG3_APPLYING_INSETS 2357 * 1 PFLAG3_FITTING_SYSTEM_WINDOWS 2358 * 1 PFLAG3_NESTED_SCROLLING_ENABLED 2359 * 1 PFLAG3_ASSIST_BLOCKED 2360 * |-------|-------|-------|-------| 2361 */ 2362 2363 /** 2364 * Flag indicating that view has a transform animation set on it. This is used to track whether 2365 * an animation is cleared between successive frames, in order to tell the associated 2366 * DisplayList to clear its animation matrix. 2367 */ 2368 static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; 2369 2370 /** 2371 * Flag indicating that view has an alpha animation set on it. This is used to track whether an 2372 * animation is cleared between successive frames, in order to tell the associated 2373 * DisplayList to restore its alpha value. 2374 */ 2375 static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; 2376 2377 /** 2378 * Flag indicating that the view has been through at least one layout since it 2379 * was last attached to a window. 2380 */ 2381 static final int PFLAG3_IS_LAID_OUT = 0x4; 2382 2383 /** 2384 * Flag indicating that a call to measure() was skipped and should be done 2385 * instead when layout() is invoked. 2386 */ 2387 static final int PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT = 0x8; 2388 2389 /** 2390 * Flag indicating that an overridden method correctly called down to 2391 * the superclass implementation as required by the API spec. 2392 */ 2393 static final int PFLAG3_CALLED_SUPER = 0x10; 2394 2395 /** 2396 * Flag indicating that we're in the process of applying window insets. 2397 */ 2398 static final int PFLAG3_APPLYING_INSETS = 0x20; 2399 2400 /** 2401 * Flag indicating that we're in the process of fitting system windows using the old method. 2402 */ 2403 static final int PFLAG3_FITTING_SYSTEM_WINDOWS = 0x40; 2404 2405 /** 2406 * Flag indicating that nested scrolling is enabled for this view. 2407 * The view will optionally cooperate with views up its parent chain to allow for 2408 * integrated nested scrolling along the same axis. 2409 */ 2410 static final int PFLAG3_NESTED_SCROLLING_ENABLED = 0x80; 2411 2412 /** 2413 * Flag indicating that the bottom scroll indicator should be displayed 2414 * when this view can scroll up. 2415 */ 2416 static final int PFLAG3_SCROLL_INDICATOR_TOP = 0x0100; 2417 2418 /** 2419 * Flag indicating that the bottom scroll indicator should be displayed 2420 * when this view can scroll down. 2421 */ 2422 static final int PFLAG3_SCROLL_INDICATOR_BOTTOM = 0x0200; 2423 2424 /** 2425 * Flag indicating that the left scroll indicator should be displayed 2426 * when this view can scroll left. 2427 */ 2428 static final int PFLAG3_SCROLL_INDICATOR_LEFT = 0x0400; 2429 2430 /** 2431 * Flag indicating that the right scroll indicator should be displayed 2432 * when this view can scroll right. 2433 */ 2434 static final int PFLAG3_SCROLL_INDICATOR_RIGHT = 0x0800; 2435 2436 /** 2437 * Flag indicating that the start scroll indicator should be displayed 2438 * when this view can scroll in the start direction. 2439 */ 2440 static final int PFLAG3_SCROLL_INDICATOR_START = 0x1000; 2441 2442 /** 2443 * Flag indicating that the end scroll indicator should be displayed 2444 * when this view can scroll in the end direction. 2445 */ 2446 static final int PFLAG3_SCROLL_INDICATOR_END = 0x2000; 2447 2448 /* End of masks for mPrivateFlags3 */ 2449 2450 static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; 2451 2452 static final int SCROLL_INDICATORS_NONE = 0x0000; 2453 2454 /** 2455 * Mask for use with setFlags indicating bits used for indicating which 2456 * scroll indicators are enabled. 2457 */ 2458 static final int SCROLL_INDICATORS_PFLAG3_MASK = PFLAG3_SCROLL_INDICATOR_TOP 2459 | PFLAG3_SCROLL_INDICATOR_BOTTOM | PFLAG3_SCROLL_INDICATOR_LEFT 2460 | PFLAG3_SCROLL_INDICATOR_RIGHT | PFLAG3_SCROLL_INDICATOR_START 2461 | PFLAG3_SCROLL_INDICATOR_END; 2462 2463 /** 2464 * Left-shift required to translate between public scroll indicator flags 2465 * and internal PFLAGS3 flags. When used as a right-shift, translates 2466 * PFLAGS3 flags to public flags. 2467 */ 2468 static final int SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT = 8; 2469 2470 /** @hide */ 2471 @Retention(RetentionPolicy.SOURCE) 2472 @IntDef(flag = true, 2473 value = { 2474 SCROLL_INDICATOR_TOP, 2475 SCROLL_INDICATOR_BOTTOM, 2476 SCROLL_INDICATOR_LEFT, 2477 SCROLL_INDICATOR_RIGHT, 2478 SCROLL_INDICATOR_START, 2479 SCROLL_INDICATOR_END, 2480 }) 2481 public @interface ScrollIndicators {} 2482 2483 /** 2484 * Scroll indicator direction for the top edge of the view. 2485 * 2486 * @see #setScrollIndicators(int) 2487 * @see #setScrollIndicators(int, int) 2488 * @see #getScrollIndicators() 2489 */ 2490 public static final int SCROLL_INDICATOR_TOP = 2491 PFLAG3_SCROLL_INDICATOR_TOP >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2492 2493 /** 2494 * Scroll indicator direction for the bottom edge of the view. 2495 * 2496 * @see #setScrollIndicators(int) 2497 * @see #setScrollIndicators(int, int) 2498 * @see #getScrollIndicators() 2499 */ 2500 public static final int SCROLL_INDICATOR_BOTTOM = 2501 PFLAG3_SCROLL_INDICATOR_BOTTOM >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2502 2503 /** 2504 * Scroll indicator direction for the left edge of the view. 2505 * 2506 * @see #setScrollIndicators(int) 2507 * @see #setScrollIndicators(int, int) 2508 * @see #getScrollIndicators() 2509 */ 2510 public static final int SCROLL_INDICATOR_LEFT = 2511 PFLAG3_SCROLL_INDICATOR_LEFT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2512 2513 /** 2514 * Scroll indicator direction for the right edge of the view. 2515 * 2516 * @see #setScrollIndicators(int) 2517 * @see #setScrollIndicators(int, int) 2518 * @see #getScrollIndicators() 2519 */ 2520 public static final int SCROLL_INDICATOR_RIGHT = 2521 PFLAG3_SCROLL_INDICATOR_RIGHT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2522 2523 /** 2524 * Scroll indicator direction for the starting edge of the view. 2525 * <p> 2526 * Resolved according to the view's layout direction, see 2527 * {@link #getLayoutDirection()} for more information. 2528 * 2529 * @see #setScrollIndicators(int) 2530 * @see #setScrollIndicators(int, int) 2531 * @see #getScrollIndicators() 2532 */ 2533 public static final int SCROLL_INDICATOR_START = 2534 PFLAG3_SCROLL_INDICATOR_START >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2535 2536 /** 2537 * Scroll indicator direction for the ending edge of the view. 2538 * <p> 2539 * Resolved according to the view's layout direction, see 2540 * {@link #getLayoutDirection()} for more information. 2541 * 2542 * @see #setScrollIndicators(int) 2543 * @see #setScrollIndicators(int, int) 2544 * @see #getScrollIndicators() 2545 */ 2546 public static final int SCROLL_INDICATOR_END = 2547 PFLAG3_SCROLL_INDICATOR_END >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2548 2549 /** 2550 * <p>Indicates that we are allowing {@link ViewStructure} to traverse 2551 * into this view.<p> 2552 */ 2553 static final int PFLAG3_ASSIST_BLOCKED = 0x100; 2554 2555 /** 2556 * Always allow a user to over-scroll this view, provided it is a 2557 * view that can scroll. 2558 * 2559 * @see #getOverScrollMode() 2560 * @see #setOverScrollMode(int) 2561 */ 2562 public static final int OVER_SCROLL_ALWAYS = 0; 2563 2564 /** 2565 * Allow a user to over-scroll this view only if the content is large 2566 * enough to meaningfully scroll, provided it is a view that can scroll. 2567 * 2568 * @see #getOverScrollMode() 2569 * @see #setOverScrollMode(int) 2570 */ 2571 public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; 2572 2573 /** 2574 * Never allow a user to over-scroll this view. 2575 * 2576 * @see #getOverScrollMode() 2577 * @see #setOverScrollMode(int) 2578 */ 2579 public static final int OVER_SCROLL_NEVER = 2; 2580 2581 /** 2582 * Special constant for {@link #setSystemUiVisibility(int)}: View has 2583 * requested the system UI (status bar) to be visible (the default). 2584 * 2585 * @see #setSystemUiVisibility(int) 2586 */ 2587 public static final int SYSTEM_UI_FLAG_VISIBLE = 0; 2588 2589 /** 2590 * Flag for {@link #setSystemUiVisibility(int)}: View has requested the 2591 * system UI to enter an unobtrusive "low profile" mode. 2592 * 2593 * <p>This is for use in games, book readers, video players, or any other 2594 * "immersive" application where the usual system chrome is deemed too distracting. 2595 * 2596 * <p>In low profile mode, the status bar and/or navigation icons may dim. 2597 * 2598 * @see #setSystemUiVisibility(int) 2599 */ 2600 public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; 2601 2602 /** 2603 * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the 2604 * system navigation be temporarily hidden. 2605 * 2606 * <p>This is an even less obtrusive state than that called for by 2607 * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls 2608 * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause 2609 * those to disappear. This is useful (in conjunction with the 2610 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and 2611 * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} 2612 * window flags) for displaying content using every last pixel on the display. 2613 * 2614 * <p>There is a limitation: because navigation controls are so important, the least user 2615 * interaction will cause them to reappear immediately. When this happens, both 2616 * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, 2617 * so that both elements reappear at the same time. 2618 * 2619 * @see #setSystemUiVisibility(int) 2620 */ 2621 public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; 2622 2623 /** 2624 * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go 2625 * into the normal fullscreen mode so that its content can take over the screen 2626 * while still allowing the user to interact with the application. 2627 * 2628 * <p>This has the same visual effect as 2629 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN 2630 * WindowManager.LayoutParams.FLAG_FULLSCREEN}, 2631 * meaning that non-critical screen decorations (such as the status bar) will be 2632 * hidden while the user is in the View's window, focusing the experience on 2633 * that content. Unlike the window flag, if you are using ActionBar in 2634 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2635 * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also 2636 * hide the action bar. 2637 * 2638 * <p>This approach to going fullscreen is best used over the window flag when 2639 * it is a transient state -- that is, the application does this at certain 2640 * points in its user interaction where it wants to allow the user to focus 2641 * on content, but not as a continuous state. For situations where the application 2642 * would like to simply stay full screen the entire time (such as a game that 2643 * wants to take over the screen), the 2644 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} 2645 * is usually a better approach. The state set here will be removed by the system 2646 * in various situations (such as the user moving to another application) like 2647 * the other system UI states. 2648 * 2649 * <p>When using this flag, the application should provide some easy facility 2650 * for the user to go out of it. A common example would be in an e-book 2651 * reader, where tapping on the screen brings back whatever screen and UI 2652 * decorations that had been hidden while the user was immersed in reading 2653 * the book. 2654 * 2655 * @see #setSystemUiVisibility(int) 2656 */ 2657 public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; 2658 2659 /** 2660 * Flag for {@link #setSystemUiVisibility(int)}: When using other layout 2661 * flags, we would like a stable view of the content insets given to 2662 * {@link #fitSystemWindows(Rect)}. This means that the insets seen there 2663 * will always represent the worst case that the application can expect 2664 * as a continuous state. In the stock Android UI this is the space for 2665 * the system bar, nav bar, and status bar, but not more transient elements 2666 * such as an input method. 2667 * 2668 * The stable layout your UI sees is based on the system UI modes you can 2669 * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 2670 * then you will get a stable layout for changes of the 2671 * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify 2672 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and 2673 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition 2674 * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} 2675 * with a stable layout. (Note that you should avoid using 2676 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) 2677 * 2678 * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} 2679 * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), 2680 * then a hidden status bar will be considered a "stable" state for purposes 2681 * here. This allows your UI to continually hide the status bar, while still 2682 * using the system UI flags to hide the action bar while still retaining 2683 * a stable layout. Note that changing the window fullscreen flag will never 2684 * provide a stable layout for a clean transition. 2685 * 2686 * <p>If you are using ActionBar in 2687 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2688 * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the 2689 * insets it adds to those given to the application. 2690 */ 2691 public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; 2692 2693 /** 2694 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2695 * to be laid out as if it has requested 2696 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This 2697 * allows it to avoid artifacts when switching in and out of that mode, at 2698 * the expense that some of its user interface may be covered by screen 2699 * decorations when they are shown. You can perform layout of your inner 2700 * UI elements to account for the navigation system UI through the 2701 * {@link #fitSystemWindows(Rect)} method. 2702 */ 2703 public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; 2704 2705 /** 2706 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2707 * to be laid out as if it has requested 2708 * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This 2709 * allows it to avoid artifacts when switching in and out of that mode, at 2710 * the expense that some of its user interface may be covered by screen 2711 * decorations when they are shown. You can perform layout of your inner 2712 * UI elements to account for non-fullscreen system UI through the 2713 * {@link #fitSystemWindows(Rect)} method. 2714 */ 2715 public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; 2716 2717 /** 2718 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2719 * hiding the navigation bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. If this flag is 2720 * not set, {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any 2721 * user interaction. 2722 * <p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only 2723 * has an effect when used in combination with that flag.</p> 2724 */ 2725 public static final int SYSTEM_UI_FLAG_IMMERSIVE = 0x00000800; 2726 2727 /** 2728 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2729 * hiding the status bar with {@link #SYSTEM_UI_FLAG_FULLSCREEN} and/or hiding the navigation 2730 * bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. Use this flag to create an immersive 2731 * experience while also hiding the system bars. If this flag is not set, 2732 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any user 2733 * interaction, and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be force-cleared by the system 2734 * if the user swipes from the top of the screen. 2735 * <p>When system bars are hidden in immersive mode, they can be revealed temporarily with 2736 * system gestures, such as swiping from the top of the screen. These transient system bars 2737 * will overlay app’s content, may have some degree of transparency, and will automatically 2738 * hide after a short timeout. 2739 * </p><p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_FULLSCREEN} and 2740 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only has an effect when used in combination 2741 * with one or both of those flags.</p> 2742 */ 2743 public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000; 2744 2745 /** 2746 * Flag for {@link #setSystemUiVisibility(int)}: Requests the status bar to draw in a mode that 2747 * is compatible with light status bar backgrounds. 2748 * 2749 * <p>For this to take effect, the window must request 2750 * {@link android.view.WindowManager.LayoutParams#FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS 2751 * FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS} but not 2752 * {@link android.view.WindowManager.LayoutParams#FLAG_TRANSLUCENT_STATUS 2753 * FLAG_TRANSLUCENT_STATUS}. 2754 * 2755 * @see android.R.attr#windowLightStatusBar 2756 */ 2757 public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 0x00002000; 2758 2759 /** 2760 * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. 2761 */ 2762 public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; 2763 2764 /** 2765 * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. 2766 */ 2767 public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; 2768 2769 /** 2770 * @hide 2771 * 2772 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2773 * out of the public fields to keep the undefined bits out of the developer's way. 2774 * 2775 * Flag to make the status bar not expandable. Unless you also 2776 * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. 2777 */ 2778 public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; 2779 2780 /** 2781 * @hide 2782 * 2783 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2784 * out of the public fields to keep the undefined bits out of the developer's way. 2785 * 2786 * Flag to hide notification icons and scrolling ticker text. 2787 */ 2788 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; 2789 2790 /** 2791 * @hide 2792 * 2793 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2794 * out of the public fields to keep the undefined bits out of the developer's way. 2795 * 2796 * Flag to disable incoming notification alerts. This will not block 2797 * icons, but it will block sound, vibrating and other visual or aural notifications. 2798 */ 2799 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; 2800 2801 /** 2802 * @hide 2803 * 2804 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2805 * out of the public fields to keep the undefined bits out of the developer's way. 2806 * 2807 * Flag to hide only the scrolling ticker. Note that 2808 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies 2809 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. 2810 */ 2811 public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; 2812 2813 /** 2814 * @hide 2815 * 2816 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2817 * out of the public fields to keep the undefined bits out of the developer's way. 2818 * 2819 * Flag to hide the center system info area. 2820 */ 2821 public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; 2822 2823 /** 2824 * @hide 2825 * 2826 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2827 * out of the public fields to keep the undefined bits out of the developer's way. 2828 * 2829 * Flag to hide only the home button. Don't use this 2830 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2831 */ 2832 public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; 2833 2834 /** 2835 * @hide 2836 * 2837 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2838 * out of the public fields to keep the undefined bits out of the developer's way. 2839 * 2840 * Flag to hide only the back button. Don't use this 2841 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2842 */ 2843 public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; 2844 2845 /** 2846 * @hide 2847 * 2848 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2849 * out of the public fields to keep the undefined bits out of the developer's way. 2850 * 2851 * Flag to hide only the clock. You might use this if your activity has 2852 * its own clock making the status bar's clock redundant. 2853 */ 2854 public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; 2855 2856 /** 2857 * @hide 2858 * 2859 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2860 * out of the public fields to keep the undefined bits out of the developer's way. 2861 * 2862 * Flag to hide only the recent apps button. Don't use this 2863 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2864 */ 2865 public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; 2866 2867 /** 2868 * @hide 2869 * 2870 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2871 * out of the public fields to keep the undefined bits out of the developer's way. 2872 * 2873 * Flag to disable the global search gesture. Don't use this 2874 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2875 */ 2876 public static final int STATUS_BAR_DISABLE_SEARCH = 0x02000000; 2877 2878 /** 2879 * @hide 2880 * 2881 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2882 * out of the public fields to keep the undefined bits out of the developer's way. 2883 * 2884 * Flag to specify that the status bar is displayed in transient mode. 2885 */ 2886 public static final int STATUS_BAR_TRANSIENT = 0x04000000; 2887 2888 /** 2889 * @hide 2890 * 2891 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2892 * out of the public fields to keep the undefined bits out of the developer's way. 2893 * 2894 * Flag to specify that the navigation bar is displayed in transient mode. 2895 */ 2896 public static final int NAVIGATION_BAR_TRANSIENT = 0x08000000; 2897 2898 /** 2899 * @hide 2900 * 2901 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2902 * out of the public fields to keep the undefined bits out of the developer's way. 2903 * 2904 * Flag to specify that the hidden status bar would like to be shown. 2905 */ 2906 public static final int STATUS_BAR_UNHIDE = 0x10000000; 2907 2908 /** 2909 * @hide 2910 * 2911 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2912 * out of the public fields to keep the undefined bits out of the developer's way. 2913 * 2914 * Flag to specify that the hidden navigation bar would like to be shown. 2915 */ 2916 public static final int NAVIGATION_BAR_UNHIDE = 0x20000000; 2917 2918 /** 2919 * @hide 2920 * 2921 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2922 * out of the public fields to keep the undefined bits out of the developer's way. 2923 * 2924 * Flag to specify that the status bar is displayed in translucent mode. 2925 */ 2926 public static final int STATUS_BAR_TRANSLUCENT = 0x40000000; 2927 2928 /** 2929 * @hide 2930 * 2931 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2932 * out of the public fields to keep the undefined bits out of the developer's way. 2933 * 2934 * Flag to specify that the navigation bar is displayed in translucent mode. 2935 */ 2936 public static final int NAVIGATION_BAR_TRANSLUCENT = 0x80000000; 2937 2938 /** 2939 * @hide 2940 * 2941 * Whether Recents is visible or not. 2942 */ 2943 public static final int RECENT_APPS_VISIBLE = 0x00004000; 2944 2945 /** 2946 * @hide 2947 * 2948 * Makes system ui transparent. 2949 */ 2950 public static final int SYSTEM_UI_TRANSPARENT = 0x00008000; 2951 2952 /** 2953 * @hide 2954 */ 2955 public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x00003FFF; 2956 2957 /** 2958 * These are the system UI flags that can be cleared by events outside 2959 * of an application. Currently this is just the ability to tap on the 2960 * screen while hiding the navigation bar to have it return. 2961 * @hide 2962 */ 2963 public static final int SYSTEM_UI_CLEARABLE_FLAGS = 2964 SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION 2965 | SYSTEM_UI_FLAG_FULLSCREEN; 2966 2967 /** 2968 * Flags that can impact the layout in relation to system UI. 2969 */ 2970 public static final int SYSTEM_UI_LAYOUT_FLAGS = 2971 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 2972 | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 2973 2974 /** @hide */ 2975 @IntDef(flag = true, 2976 value = { FIND_VIEWS_WITH_TEXT, FIND_VIEWS_WITH_CONTENT_DESCRIPTION }) 2977 @Retention(RetentionPolicy.SOURCE) 2978 public @interface FindViewFlags {} 2979 2980 /** 2981 * Find views that render the specified text. 2982 * 2983 * @see #findViewsWithText(ArrayList, CharSequence, int) 2984 */ 2985 public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; 2986 2987 /** 2988 * Find find views that contain the specified content description. 2989 * 2990 * @see #findViewsWithText(ArrayList, CharSequence, int) 2991 */ 2992 public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; 2993 2994 /** 2995 * Find views that contain {@link AccessibilityNodeProvider}. Such 2996 * a View is a root of virtual view hierarchy and may contain the searched 2997 * text. If this flag is set Views with providers are automatically 2998 * added and it is a responsibility of the client to call the APIs of 2999 * the provider to determine whether the virtual tree rooted at this View 3000 * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s 3001 * representing the virtual views with this text. 3002 * 3003 * @see #findViewsWithText(ArrayList, CharSequence, int) 3004 * 3005 * @hide 3006 */ 3007 public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; 3008 3009 /** 3010 * The undefined cursor position. 3011 * 3012 * @hide 3013 */ 3014 public static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; 3015 3016 /** 3017 * Indicates that the screen has changed state and is now off. 3018 * 3019 * @see #onScreenStateChanged(int) 3020 */ 3021 public static final int SCREEN_STATE_OFF = 0x0; 3022 3023 /** 3024 * Indicates that the screen has changed state and is now on. 3025 * 3026 * @see #onScreenStateChanged(int) 3027 */ 3028 public static final int SCREEN_STATE_ON = 0x1; 3029 3030 /** 3031 * Indicates no axis of view scrolling. 3032 */ 3033 public static final int SCROLL_AXIS_NONE = 0; 3034 3035 /** 3036 * Indicates scrolling along the horizontal axis. 3037 */ 3038 public static final int SCROLL_AXIS_HORIZONTAL = 1 << 0; 3039 3040 /** 3041 * Indicates scrolling along the vertical axis. 3042 */ 3043 public static final int SCROLL_AXIS_VERTICAL = 1 << 1; 3044 3045 /** 3046 * Controls the over-scroll mode for this view. 3047 * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, 3048 * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, 3049 * and {@link #OVER_SCROLL_NEVER}. 3050 */ 3051 private int mOverScrollMode; 3052 3053 /** 3054 * The parent this view is attached to. 3055 * {@hide} 3056 * 3057 * @see #getParent() 3058 */ 3059 protected ViewParent mParent; 3060 3061 /** 3062 * {@hide} 3063 */ 3064 AttachInfo mAttachInfo; 3065 3066 /** 3067 * {@hide} 3068 */ 3069 @ViewDebug.ExportedProperty(flagMapping = { 3070 @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, 3071 name = "FORCE_LAYOUT"), 3072 @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, 3073 name = "LAYOUT_REQUIRED"), 3074 @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, 3075 name = "DRAWING_CACHE_INVALID", outputIf = false), 3076 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), 3077 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), 3078 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), 3079 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") 3080 }, formatToHexString = true) 3081 int mPrivateFlags; 3082 int mPrivateFlags2; 3083 int mPrivateFlags3; 3084 3085 /** 3086 * This view's request for the visibility of the status bar. 3087 * @hide 3088 */ 3089 @ViewDebug.ExportedProperty(flagMapping = { 3090 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, 3091 equals = SYSTEM_UI_FLAG_LOW_PROFILE, 3092 name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), 3093 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 3094 equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 3095 name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), 3096 @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, 3097 equals = SYSTEM_UI_FLAG_VISIBLE, 3098 name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) 3099 }, formatToHexString = true) 3100 int mSystemUiVisibility; 3101 3102 /** 3103 * Reference count for transient state. 3104 * @see #setHasTransientState(boolean) 3105 */ 3106 int mTransientStateCount = 0; 3107 3108 /** 3109 * Count of how many windows this view has been attached to. 3110 */ 3111 int mWindowAttachCount; 3112 3113 /** 3114 * The layout parameters associated with this view and used by the parent 3115 * {@link android.view.ViewGroup} to determine how this view should be 3116 * laid out. 3117 * {@hide} 3118 */ 3119 protected ViewGroup.LayoutParams mLayoutParams; 3120 3121 /** 3122 * The view flags hold various views states. 3123 * {@hide} 3124 */ 3125 @ViewDebug.ExportedProperty(formatToHexString = true) 3126 int mViewFlags; 3127 3128 static class TransformationInfo { 3129 /** 3130 * The transform matrix for the View. This transform is calculated internally 3131 * based on the translation, rotation, and scale properties. 3132 * 3133 * Do *not* use this variable directly; instead call getMatrix(), which will 3134 * load the value from the View's RenderNode. 3135 */ 3136 private final Matrix mMatrix = new Matrix(); 3137 3138 /** 3139 * The inverse transform matrix for the View. This transform is calculated 3140 * internally based on the translation, rotation, and scale properties. 3141 * 3142 * Do *not* use this variable directly; instead call getInverseMatrix(), 3143 * which will load the value from the View's RenderNode. 3144 */ 3145 private Matrix mInverseMatrix; 3146 3147 /** 3148 * The opacity of the View. This is a value from 0 to 1, where 0 means 3149 * completely transparent and 1 means completely opaque. 3150 */ 3151 @ViewDebug.ExportedProperty 3152 float mAlpha = 1f; 3153 3154 /** 3155 * The opacity of the view as manipulated by the Fade transition. This is a hidden 3156 * property only used by transitions, which is composited with the other alpha 3157 * values to calculate the final visual alpha value. 3158 */ 3159 float mTransitionAlpha = 1f; 3160 } 3161 3162 TransformationInfo mTransformationInfo; 3163 3164 /** 3165 * Current clip bounds. to which all drawing of this view are constrained. 3166 */ 3167 Rect mClipBounds = null; 3168 3169 private boolean mLastIsOpaque; 3170 3171 /** 3172 * The distance in pixels from the left edge of this view's parent 3173 * to the left edge of this view. 3174 * {@hide} 3175 */ 3176 @ViewDebug.ExportedProperty(category = "layout") 3177 protected int mLeft; 3178 /** 3179 * The distance in pixels from the left edge of this view's parent 3180 * to the right edge of this view. 3181 * {@hide} 3182 */ 3183 @ViewDebug.ExportedProperty(category = "layout") 3184 protected int mRight; 3185 /** 3186 * The distance in pixels from the top edge of this view's parent 3187 * to the top edge of this view. 3188 * {@hide} 3189 */ 3190 @ViewDebug.ExportedProperty(category = "layout") 3191 protected int mTop; 3192 /** 3193 * The distance in pixels from the top edge of this view's parent 3194 * to the bottom edge of this view. 3195 * {@hide} 3196 */ 3197 @ViewDebug.ExportedProperty(category = "layout") 3198 protected int mBottom; 3199 3200 /** 3201 * The offset, in pixels, by which the content of this view is scrolled 3202 * horizontally. 3203 * {@hide} 3204 */ 3205 @ViewDebug.ExportedProperty(category = "scrolling") 3206 protected int mScrollX; 3207 /** 3208 * The offset, in pixels, by which the content of this view is scrolled 3209 * vertically. 3210 * {@hide} 3211 */ 3212 @ViewDebug.ExportedProperty(category = "scrolling") 3213 protected int mScrollY; 3214 3215 /** 3216 * The left padding in pixels, that is the distance in pixels between the 3217 * left edge of this view and the left edge of its content. 3218 * {@hide} 3219 */ 3220 @ViewDebug.ExportedProperty(category = "padding") 3221 protected int mPaddingLeft = 0; 3222 /** 3223 * The right padding in pixels, that is the distance in pixels between the 3224 * right edge of this view and the right edge of its content. 3225 * {@hide} 3226 */ 3227 @ViewDebug.ExportedProperty(category = "padding") 3228 protected int mPaddingRight = 0; 3229 /** 3230 * The top padding in pixels, that is the distance in pixels between the 3231 * top edge of this view and the top edge of its content. 3232 * {@hide} 3233 */ 3234 @ViewDebug.ExportedProperty(category = "padding") 3235 protected int mPaddingTop; 3236 /** 3237 * The bottom padding in pixels, that is the distance in pixels between the 3238 * bottom edge of this view and the bottom edge of its content. 3239 * {@hide} 3240 */ 3241 @ViewDebug.ExportedProperty(category = "padding") 3242 protected int mPaddingBottom; 3243 3244 /** 3245 * The layout insets in pixels, that is the distance in pixels between the 3246 * visible edges of this view its bounds. 3247 */ 3248 private Insets mLayoutInsets; 3249 3250 /** 3251 * Briefly describes the view and is primarily used for accessibility support. 3252 */ 3253 private CharSequence mContentDescription; 3254 3255 /** 3256 * Specifies the id of a view for which this view serves as a label for 3257 * accessibility purposes. 3258 */ 3259 private int mLabelForId = View.NO_ID; 3260 3261 /** 3262 * Predicate for matching labeled view id with its label for 3263 * accessibility purposes. 3264 */ 3265 private MatchLabelForPredicate mMatchLabelForPredicate; 3266 3267 /** 3268 * Specifies a view before which this one is visited in accessibility traversal. 3269 */ 3270 private int mAccessibilityTraversalBeforeId = NO_ID; 3271 3272 /** 3273 * Specifies a view after which this one is visited in accessibility traversal. 3274 */ 3275 private int mAccessibilityTraversalAfterId = NO_ID; 3276 3277 /** 3278 * Predicate for matching a view by its id. 3279 */ 3280 private MatchIdPredicate mMatchIdPredicate; 3281 3282 /** 3283 * Cache the paddingRight set by the user to append to the scrollbar's size. 3284 * 3285 * @hide 3286 */ 3287 @ViewDebug.ExportedProperty(category = "padding") 3288 protected int mUserPaddingRight; 3289 3290 /** 3291 * Cache the paddingBottom set by the user to append to the scrollbar's size. 3292 * 3293 * @hide 3294 */ 3295 @ViewDebug.ExportedProperty(category = "padding") 3296 protected int mUserPaddingBottom; 3297 3298 /** 3299 * Cache the paddingLeft set by the user to append to the scrollbar's size. 3300 * 3301 * @hide 3302 */ 3303 @ViewDebug.ExportedProperty(category = "padding") 3304 protected int mUserPaddingLeft; 3305 3306 /** 3307 * Cache the paddingStart set by the user to append to the scrollbar's size. 3308 * 3309 */ 3310 @ViewDebug.ExportedProperty(category = "padding") 3311 int mUserPaddingStart; 3312 3313 /** 3314 * Cache the paddingEnd set by the user to append to the scrollbar's size. 3315 * 3316 */ 3317 @ViewDebug.ExportedProperty(category = "padding") 3318 int mUserPaddingEnd; 3319 3320 /** 3321 * Cache initial left padding. 3322 * 3323 * @hide 3324 */ 3325 int mUserPaddingLeftInitial; 3326 3327 /** 3328 * Cache initial right padding. 3329 * 3330 * @hide 3331 */ 3332 int mUserPaddingRightInitial; 3333 3334 /** 3335 * Default undefined padding 3336 */ 3337 private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; 3338 3339 /** 3340 * Cache if a left padding has been defined 3341 */ 3342 private boolean mLeftPaddingDefined = false; 3343 3344 /** 3345 * Cache if a right padding has been defined 3346 */ 3347 private boolean mRightPaddingDefined = false; 3348 3349 /** 3350 * @hide 3351 */ 3352 int mOldWidthMeasureSpec = Integer.MIN_VALUE; 3353 /** 3354 * @hide 3355 */ 3356 int mOldHeightMeasureSpec = Integer.MIN_VALUE; 3357 3358 private LongSparseLongArray mMeasureCache; 3359 3360 @ViewDebug.ExportedProperty(deepExport = true, prefix = "bg_") 3361 private Drawable mBackground; 3362 private TintInfo mBackgroundTint; 3363 3364 @ViewDebug.ExportedProperty(deepExport = true, prefix = "fg_") 3365 private ForegroundInfo mForegroundInfo; 3366 3367 private Drawable mScrollIndicatorDrawable; 3368 3369 /** 3370 * RenderNode used for backgrounds. 3371 * <p> 3372 * When non-null and valid, this is expected to contain an up-to-date copy 3373 * of the background drawable. It is cleared on temporary detach, and reset 3374 * on cleanup. 3375 */ 3376 private RenderNode mBackgroundRenderNode; 3377 3378 private int mBackgroundResource; 3379 private boolean mBackgroundSizeChanged; 3380 3381 private String mTransitionName; 3382 3383 static class TintInfo { 3384 ColorStateList mTintList; 3385 PorterDuff.Mode mTintMode; 3386 boolean mHasTintMode; 3387 boolean mHasTintList; 3388 } 3389 3390 private static class ForegroundInfo { 3391 private Drawable mDrawable; 3392 private TintInfo mTintInfo; 3393 private int mGravity = Gravity.FILL; 3394 private boolean mInsidePadding = true; 3395 private boolean mBoundsChanged = true; 3396 private final Rect mSelfBounds = new Rect(); 3397 private final Rect mOverlayBounds = new Rect(); 3398 } 3399 3400 static class ListenerInfo { 3401 /** 3402 * Listener used to dispatch focus change events. 3403 * This field should be made private, so it is hidden from the SDK. 3404 * {@hide} 3405 */ 3406 protected OnFocusChangeListener mOnFocusChangeListener; 3407 3408 /** 3409 * Listeners for layout change events. 3410 */ 3411 private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; 3412 3413 protected OnScrollChangeListener mOnScrollChangeListener; 3414 3415 /** 3416 * Listeners for attach events. 3417 */ 3418 private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; 3419 3420 /** 3421 * Listener used to dispatch click events. 3422 * This field should be made private, so it is hidden from the SDK. 3423 * {@hide} 3424 */ 3425 public OnClickListener mOnClickListener; 3426 3427 /** 3428 * Listener used to dispatch long click events. 3429 * This field should be made private, so it is hidden from the SDK. 3430 * {@hide} 3431 */ 3432 protected OnLongClickListener mOnLongClickListener; 3433 3434 /** 3435 * Listener used to dispatch context click events. This field should be made private, so it 3436 * is hidden from the SDK. 3437 * {@hide} 3438 */ 3439 protected OnContextClickListener mOnContextClickListener; 3440 3441 /** 3442 * Listener used to build the context menu. 3443 * This field should be made private, so it is hidden from the SDK. 3444 * {@hide} 3445 */ 3446 protected OnCreateContextMenuListener mOnCreateContextMenuListener; 3447 3448 private OnKeyListener mOnKeyListener; 3449 3450 private OnTouchListener mOnTouchListener; 3451 3452 private OnHoverListener mOnHoverListener; 3453 3454 private OnGenericMotionListener mOnGenericMotionListener; 3455 3456 private OnDragListener mOnDragListener; 3457 3458 private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; 3459 3460 OnApplyWindowInsetsListener mOnApplyWindowInsetsListener; 3461 } 3462 3463 ListenerInfo mListenerInfo; 3464 3465 /** 3466 * The application environment this view lives in. 3467 * This field should be made private, so it is hidden from the SDK. 3468 * {@hide} 3469 */ 3470 @ViewDebug.ExportedProperty(deepExport = true) 3471 protected Context mContext; 3472 3473 private final Resources mResources; 3474 3475 private ScrollabilityCache mScrollCache; 3476 3477 private int[] mDrawableState = null; 3478 3479 ViewOutlineProvider mOutlineProvider = ViewOutlineProvider.BACKGROUND; 3480 3481 /** 3482 * Animator that automatically runs based on state changes. 3483 */ 3484 private StateListAnimator mStateListAnimator; 3485 3486 /** 3487 * When this view has focus and the next focus is {@link #FOCUS_LEFT}, 3488 * the user may specify which view to go to next. 3489 */ 3490 private int mNextFocusLeftId = View.NO_ID; 3491 3492 /** 3493 * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, 3494 * the user may specify which view to go to next. 3495 */ 3496 private int mNextFocusRightId = View.NO_ID; 3497 3498 /** 3499 * When this view has focus and the next focus is {@link #FOCUS_UP}, 3500 * the user may specify which view to go to next. 3501 */ 3502 private int mNextFocusUpId = View.NO_ID; 3503 3504 /** 3505 * When this view has focus and the next focus is {@link #FOCUS_DOWN}, 3506 * the user may specify which view to go to next. 3507 */ 3508 private int mNextFocusDownId = View.NO_ID; 3509 3510 /** 3511 * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, 3512 * the user may specify which view to go to next. 3513 */ 3514 int mNextFocusForwardId = View.NO_ID; 3515 3516 private CheckForLongPress mPendingCheckForLongPress; 3517 private CheckForTap mPendingCheckForTap = null; 3518 private PerformClick mPerformClick; 3519 private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; 3520 3521 private UnsetPressedState mUnsetPressedState; 3522 3523 /** 3524 * Whether the long press's action has been invoked. The tap's action is invoked on the 3525 * up event while a long press is invoked as soon as the long press duration is reached, so 3526 * a long press could be performed before the tap is checked, in which case the tap's action 3527 * should not be invoked. 3528 */ 3529 private boolean mHasPerformedLongPress; 3530 3531 /** 3532 * Whether a context click button is currently pressed down. This is true when the stylus is 3533 * touching the screen and the primary button has been pressed, or if a mouse's right button is 3534 * pressed. This is false once the button is released or if the stylus has been lifted. 3535 */ 3536 private boolean mInContextButtonPress; 3537 3538 /** 3539 * Whether the next up event should be ignored for the purposes of gesture recognition. This is 3540 * true after a stylus button press has occured, when the next up event should not be recognized 3541 * as a tap. 3542 */ 3543 private boolean mIgnoreNextUpEvent; 3544 3545 /** 3546 * The minimum height of the view. We'll try our best to have the height 3547 * of this view to at least this amount. 3548 */ 3549 @ViewDebug.ExportedProperty(category = "measurement") 3550 private int mMinHeight; 3551 3552 /** 3553 * The minimum width of the view. We'll try our best to have the width 3554 * of this view to at least this amount. 3555 */ 3556 @ViewDebug.ExportedProperty(category = "measurement") 3557 private int mMinWidth; 3558 3559 /** 3560 * The delegate to handle touch events that are physically in this view 3561 * but should be handled by another view. 3562 */ 3563 private TouchDelegate mTouchDelegate = null; 3564 3565 /** 3566 * Solid color to use as a background when creating the drawing cache. Enables 3567 * the cache to use 16 bit bitmaps instead of 32 bit. 3568 */ 3569 private int mDrawingCacheBackgroundColor = 0; 3570 3571 /** 3572 * Special tree observer used when mAttachInfo is null. 3573 */ 3574 private ViewTreeObserver mFloatingTreeObserver; 3575 3576 /** 3577 * Cache the touch slop from the context that created the view. 3578 */ 3579 private int mTouchSlop; 3580 3581 /** 3582 * Object that handles automatic animation of view properties. 3583 */ 3584 private ViewPropertyAnimator mAnimator = null; 3585 3586 /** 3587 * Flag indicating that a drag can cross window boundaries. When 3588 * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called 3589 * with this flag set, all visible applications will be able to participate 3590 * in the drag operation and receive the dragged content. 3591 * 3592 * @hide 3593 */ 3594 public static final int DRAG_FLAG_GLOBAL = 1; 3595 3596 /** 3597 * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. 3598 */ 3599 private float mVerticalScrollFactor; 3600 3601 /** 3602 * Position of the vertical scroll bar. 3603 */ 3604 private int mVerticalScrollbarPosition; 3605 3606 /** 3607 * Position the scroll bar at the default position as determined by the system. 3608 */ 3609 public static final int SCROLLBAR_POSITION_DEFAULT = 0; 3610 3611 /** 3612 * Position the scroll bar along the left edge. 3613 */ 3614 public static final int SCROLLBAR_POSITION_LEFT = 1; 3615 3616 /** 3617 * Position the scroll bar along the right edge. 3618 */ 3619 public static final int SCROLLBAR_POSITION_RIGHT = 2; 3620 3621 /** 3622 * Indicates that the view does not have a layer. 3623 * 3624 * @see #getLayerType() 3625 * @see #setLayerType(int, android.graphics.Paint) 3626 * @see #LAYER_TYPE_SOFTWARE 3627 * @see #LAYER_TYPE_HARDWARE 3628 */ 3629 public static final int LAYER_TYPE_NONE = 0; 3630 3631 /** 3632 * <p>Indicates that the view has a software layer. A software layer is backed 3633 * by a bitmap and causes the view to be rendered using Android's software 3634 * rendering pipeline, even if hardware acceleration is enabled.</p> 3635 * 3636 * <p>Software layers have various usages:</p> 3637 * <p>When the application is not using hardware acceleration, a software layer 3638 * is useful to apply a specific color filter and/or blending mode and/or 3639 * translucency to a view and all its children.</p> 3640 * <p>When the application is using hardware acceleration, a software layer 3641 * is useful to render drawing primitives not supported by the hardware 3642 * accelerated pipeline. It can also be used to cache a complex view tree 3643 * into a texture and reduce the complexity of drawing operations. For instance, 3644 * when animating a complex view tree with a translation, a software layer can 3645 * be used to render the view tree only once.</p> 3646 * <p>Software layers should be avoided when the affected view tree updates 3647 * often. Every update will require to re-render the software layer, which can 3648 * potentially be slow (particularly when hardware acceleration is turned on 3649 * since the layer will have to be uploaded into a hardware texture after every 3650 * update.)</p> 3651 * 3652 * @see #getLayerType() 3653 * @see #setLayerType(int, android.graphics.Paint) 3654 * @see #LAYER_TYPE_NONE 3655 * @see #LAYER_TYPE_HARDWARE 3656 */ 3657 public static final int LAYER_TYPE_SOFTWARE = 1; 3658 3659 /** 3660 * <p>Indicates that the view has a hardware layer. A hardware layer is backed 3661 * by a hardware specific texture (generally Frame Buffer Objects or FBO on 3662 * OpenGL hardware) and causes the view to be rendered using Android's hardware 3663 * rendering pipeline, but only if hardware acceleration is turned on for the 3664 * view hierarchy. When hardware acceleration is turned off, hardware layers 3665 * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> 3666 * 3667 * <p>A hardware layer is useful to apply a specific color filter and/or 3668 * blending mode and/or translucency to a view and all its children.</p> 3669 * <p>A hardware layer can be used to cache a complex view tree into a 3670 * texture and reduce the complexity of drawing operations. For instance, 3671 * when animating a complex view tree with a translation, a hardware layer can 3672 * be used to render the view tree only once.</p> 3673 * <p>A hardware layer can also be used to increase the rendering quality when 3674 * rotation transformations are applied on a view. It can also be used to 3675 * prevent potential clipping issues when applying 3D transforms on a view.</p> 3676 * 3677 * @see #getLayerType() 3678 * @see #setLayerType(int, android.graphics.Paint) 3679 * @see #LAYER_TYPE_NONE 3680 * @see #LAYER_TYPE_SOFTWARE 3681 */ 3682 public static final int LAYER_TYPE_HARDWARE = 2; 3683 3684 @ViewDebug.ExportedProperty(category = "drawing", mapping = { 3685 @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), 3686 @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), 3687 @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") 3688 }) 3689 int mLayerType = LAYER_TYPE_NONE; 3690 Paint mLayerPaint; 3691 3692 /** 3693 * Set to true when drawing cache is enabled and cannot be created. 3694 * 3695 * @hide 3696 */ 3697 public boolean mCachingFailed; 3698 private Bitmap mDrawingCache; 3699 private Bitmap mUnscaledDrawingCache; 3700 3701 /** 3702 * RenderNode holding View properties, potentially holding a DisplayList of View content. 3703 * <p> 3704 * When non-null and valid, this is expected to contain an up-to-date copy 3705 * of the View content. Its DisplayList content is cleared on temporary detach and reset on 3706 * cleanup. 3707 */ 3708 final RenderNode mRenderNode; 3709 3710 /** 3711 * Set to true when the view is sending hover accessibility events because it 3712 * is the innermost hovered view. 3713 */ 3714 private boolean mSendingHoverAccessibilityEvents; 3715 3716 /** 3717 * Delegate for injecting accessibility functionality. 3718 */ 3719 AccessibilityDelegate mAccessibilityDelegate; 3720 3721 /** 3722 * The view's overlay layer. Developers get a reference to the overlay via getOverlay() 3723 * and add/remove objects to/from the overlay directly through the Overlay methods. 3724 */ 3725 ViewOverlay mOverlay; 3726 3727 /** 3728 * The currently active parent view for receiving delegated nested scrolling events. 3729 * This is set by {@link #startNestedScroll(int)} during a touch interaction and cleared 3730 * by {@link #stopNestedScroll()} at the same point where we clear 3731 * requestDisallowInterceptTouchEvent. 3732 */ 3733 private ViewParent mNestedScrollingParent; 3734 3735 /** 3736 * Consistency verifier for debugging purposes. 3737 * @hide 3738 */ 3739 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 3740 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 3741 new InputEventConsistencyVerifier(this, 0) : null; 3742 3743 private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); 3744 3745 private int[] mTempNestedScrollConsumed; 3746 3747 /** 3748 * An overlay is going to draw this View instead of being drawn as part of this 3749 * View's parent. mGhostView is the View in the Overlay that must be invalidated 3750 * when this view is invalidated. 3751 */ 3752 GhostView mGhostView; 3753 3754 /** 3755 * Holds pairs of adjacent attribute data: attribute name followed by its value. 3756 * @hide 3757 */ 3758 @ViewDebug.ExportedProperty(category = "attributes", hasAdjacentMapping = true) 3759 public String[] mAttributes; 3760 3761 /** 3762 * Maps a Resource id to its name. 3763 */ 3764 private static SparseArray<String> mAttributeMap; 3765 3766 /** 3767 * @hide 3768 */ 3769 String mStartActivityRequestWho; 3770 3771 /** 3772 * Simple constructor to use when creating a view from code. 3773 * 3774 * @param context The Context the view is running in, through which it can 3775 * access the current theme, resources, etc. 3776 */ 3777 public View(Context context) { 3778 mContext = context; 3779 mResources = context != null ? context.getResources() : null; 3780 mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; 3781 // Set some flags defaults 3782 mPrivateFlags2 = 3783 (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | 3784 (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | 3785 (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | 3786 (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | 3787 (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | 3788 (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); 3789 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 3790 setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); 3791 mUserPaddingStart = UNDEFINED_PADDING; 3792 mUserPaddingEnd = UNDEFINED_PADDING; 3793 mRenderNode = RenderNode.create(getClass().getName(), this); 3794 3795 if (!sCompatibilityDone && context != null) { 3796 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3797 3798 // Older apps may need this compatibility hack for measurement. 3799 sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1; 3800 3801 // Older apps expect onMeasure() to always be called on a layout pass, regardless 3802 // of whether a layout was requested on that View. 3803 sIgnoreMeasureCache = targetSdkVersion < KITKAT; 3804 3805 Canvas.sCompatibilityRestore = targetSdkVersion < MNC; 3806 3807 // In MNC and newer, our widgets can pass a "hint" value in the size 3808 // for UNSPECIFIED MeasureSpecs. This lets child views of scrolling containers 3809 // know what the expected parent size is going to be, so e.g. list items can size 3810 // themselves at 1/3 the size of their container. It breaks older apps though, 3811 // specifically apps that use some popular open source libraries. 3812 sUseZeroUnspecifiedMeasureSpec = targetSdkVersion < MNC; 3813 3814 sCompatibilityDone = true; 3815 } 3816 } 3817 3818 /** 3819 * Constructor that is called when inflating a view from XML. This is called 3820 * when a view is being constructed from an XML file, supplying attributes 3821 * that were specified in the XML file. This version uses a default style of 3822 * 0, so the only attribute values applied are those in the Context's Theme 3823 * and the given AttributeSet. 3824 * 3825 * <p> 3826 * The method onFinishInflate() will be called after all children have been 3827 * added. 3828 * 3829 * @param context The Context the view is running in, through which it can 3830 * access the current theme, resources, etc. 3831 * @param attrs The attributes of the XML tag that is inflating the view. 3832 * @see #View(Context, AttributeSet, int) 3833 */ 3834 public View(Context context, @Nullable AttributeSet attrs) { 3835 this(context, attrs, 0); 3836 } 3837 3838 /** 3839 * Perform inflation from XML and apply a class-specific base style from a 3840 * theme attribute. This constructor of View allows subclasses to use their 3841 * own base style when they are inflating. For example, a Button class's 3842 * constructor would call this version of the super class constructor and 3843 * supply <code>R.attr.buttonStyle</code> for <var>defStyleAttr</var>; this 3844 * allows the theme's button style to modify all of the base view attributes 3845 * (in particular its background) as well as the Button class's attributes. 3846 * 3847 * @param context The Context the view is running in, through which it can 3848 * access the current theme, resources, etc. 3849 * @param attrs The attributes of the XML tag that is inflating the view. 3850 * @param defStyleAttr An attribute in the current theme that contains a 3851 * reference to a style resource that supplies default values for 3852 * the view. Can be 0 to not look for defaults. 3853 * @see #View(Context, AttributeSet) 3854 */ 3855 public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 3856 this(context, attrs, defStyleAttr, 0); 3857 } 3858 3859 /** 3860 * Perform inflation from XML and apply a class-specific base style from a 3861 * theme attribute or style resource. This constructor of View allows 3862 * subclasses to use their own base style when they are inflating. 3863 * <p> 3864 * When determining the final value of a particular attribute, there are 3865 * four inputs that come into play: 3866 * <ol> 3867 * <li>Any attribute values in the given AttributeSet. 3868 * <li>The style resource specified in the AttributeSet (named "style"). 3869 * <li>The default style specified by <var>defStyleAttr</var>. 3870 * <li>The default style specified by <var>defStyleRes</var>. 3871 * <li>The base values in this theme. 3872 * </ol> 3873 * <p> 3874 * Each of these inputs is considered in-order, with the first listed taking 3875 * precedence over the following ones. In other words, if in the 3876 * AttributeSet you have supplied <code><Button * textColor="#ff000000"></code> 3877 * , then the button's text will <em>always</em> be black, regardless of 3878 * what is specified in any of the styles. 3879 * 3880 * @param context The Context the view is running in, through which it can 3881 * access the current theme, resources, etc. 3882 * @param attrs The attributes of the XML tag that is inflating the view. 3883 * @param defStyleAttr An attribute in the current theme that contains a 3884 * reference to a style resource that supplies default values for 3885 * the view. Can be 0 to not look for defaults. 3886 * @param defStyleRes A resource identifier of a style resource that 3887 * supplies default values for the view, used only if 3888 * defStyleAttr is 0 or can not be found in the theme. Can be 0 3889 * to not look for defaults. 3890 * @see #View(Context, AttributeSet, int) 3891 */ 3892 public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) { 3893 this(context); 3894 3895 final TypedArray a = context.obtainStyledAttributes( 3896 attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes); 3897 3898 if (mDebugViewAttributes) { 3899 saveAttributeData(attrs, a); 3900 } 3901 3902 Drawable background = null; 3903 3904 int leftPadding = -1; 3905 int topPadding = -1; 3906 int rightPadding = -1; 3907 int bottomPadding = -1; 3908 int startPadding = UNDEFINED_PADDING; 3909 int endPadding = UNDEFINED_PADDING; 3910 3911 int padding = -1; 3912 3913 int viewFlagValues = 0; 3914 int viewFlagMasks = 0; 3915 3916 boolean setScrollContainer = false; 3917 3918 int x = 0; 3919 int y = 0; 3920 3921 float tx = 0; 3922 float ty = 0; 3923 float tz = 0; 3924 float elevation = 0; 3925 float rotation = 0; 3926 float rotationX = 0; 3927 float rotationY = 0; 3928 float sx = 1f; 3929 float sy = 1f; 3930 boolean transformSet = false; 3931 3932 int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; 3933 int overScrollMode = mOverScrollMode; 3934 boolean initializeScrollbars = false; 3935 boolean initializeScrollIndicators = false; 3936 3937 boolean startPaddingDefined = false; 3938 boolean endPaddingDefined = false; 3939 boolean leftPaddingDefined = false; 3940 boolean rightPaddingDefined = false; 3941 3942 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3943 3944 final int N = a.getIndexCount(); 3945 for (int i = 0; i < N; i++) { 3946 int attr = a.getIndex(i); 3947 switch (attr) { 3948 case com.android.internal.R.styleable.View_background: 3949 background = a.getDrawable(attr); 3950 break; 3951 case com.android.internal.R.styleable.View_padding: 3952 padding = a.getDimensionPixelSize(attr, -1); 3953 mUserPaddingLeftInitial = padding; 3954 mUserPaddingRightInitial = padding; 3955 leftPaddingDefined = true; 3956 rightPaddingDefined = true; 3957 break; 3958 case com.android.internal.R.styleable.View_paddingLeft: 3959 leftPadding = a.getDimensionPixelSize(attr, -1); 3960 mUserPaddingLeftInitial = leftPadding; 3961 leftPaddingDefined = true; 3962 break; 3963 case com.android.internal.R.styleable.View_paddingTop: 3964 topPadding = a.getDimensionPixelSize(attr, -1); 3965 break; 3966 case com.android.internal.R.styleable.View_paddingRight: 3967 rightPadding = a.getDimensionPixelSize(attr, -1); 3968 mUserPaddingRightInitial = rightPadding; 3969 rightPaddingDefined = true; 3970 break; 3971 case com.android.internal.R.styleable.View_paddingBottom: 3972 bottomPadding = a.getDimensionPixelSize(attr, -1); 3973 break; 3974 case com.android.internal.R.styleable.View_paddingStart: 3975 startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3976 startPaddingDefined = (startPadding != UNDEFINED_PADDING); 3977 break; 3978 case com.android.internal.R.styleable.View_paddingEnd: 3979 endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3980 endPaddingDefined = (endPadding != UNDEFINED_PADDING); 3981 break; 3982 case com.android.internal.R.styleable.View_scrollX: 3983 x = a.getDimensionPixelOffset(attr, 0); 3984 break; 3985 case com.android.internal.R.styleable.View_scrollY: 3986 y = a.getDimensionPixelOffset(attr, 0); 3987 break; 3988 case com.android.internal.R.styleable.View_alpha: 3989 setAlpha(a.getFloat(attr, 1f)); 3990 break; 3991 case com.android.internal.R.styleable.View_transformPivotX: 3992 setPivotX(a.getDimensionPixelOffset(attr, 0)); 3993 break; 3994 case com.android.internal.R.styleable.View_transformPivotY: 3995 setPivotY(a.getDimensionPixelOffset(attr, 0)); 3996 break; 3997 case com.android.internal.R.styleable.View_translationX: 3998 tx = a.getDimensionPixelOffset(attr, 0); 3999 transformSet = true; 4000 break; 4001 case com.android.internal.R.styleable.View_translationY: 4002 ty = a.getDimensionPixelOffset(attr, 0); 4003 transformSet = true; 4004 break; 4005 case com.android.internal.R.styleable.View_translationZ: 4006 tz = a.getDimensionPixelOffset(attr, 0); 4007 transformSet = true; 4008 break; 4009 case com.android.internal.R.styleable.View_elevation: 4010 elevation = a.getDimensionPixelOffset(attr, 0); 4011 transformSet = true; 4012 break; 4013 case com.android.internal.R.styleable.View_rotation: 4014 rotation = a.getFloat(attr, 0); 4015 transformSet = true; 4016 break; 4017 case com.android.internal.R.styleable.View_rotationX: 4018 rotationX = a.getFloat(attr, 0); 4019 transformSet = true; 4020 break; 4021 case com.android.internal.R.styleable.View_rotationY: 4022 rotationY = a.getFloat(attr, 0); 4023 transformSet = true; 4024 break; 4025 case com.android.internal.R.styleable.View_scaleX: 4026 sx = a.getFloat(attr, 1f); 4027 transformSet = true; 4028 break; 4029 case com.android.internal.R.styleable.View_scaleY: 4030 sy = a.getFloat(attr, 1f); 4031 transformSet = true; 4032 break; 4033 case com.android.internal.R.styleable.View_id: 4034 mID = a.getResourceId(attr, NO_ID); 4035 break; 4036 case com.android.internal.R.styleable.View_tag: 4037 mTag = a.getText(attr); 4038 break; 4039 case com.android.internal.R.styleable.View_fitsSystemWindows: 4040 if (a.getBoolean(attr, false)) { 4041 viewFlagValues |= FITS_SYSTEM_WINDOWS; 4042 viewFlagMasks |= FITS_SYSTEM_WINDOWS; 4043 } 4044 break; 4045 case com.android.internal.R.styleable.View_focusable: 4046 if (a.getBoolean(attr, false)) { 4047 viewFlagValues |= FOCUSABLE; 4048 viewFlagMasks |= FOCUSABLE_MASK; 4049 } 4050 break; 4051 case com.android.internal.R.styleable.View_focusableInTouchMode: 4052 if (a.getBoolean(attr, false)) { 4053 viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; 4054 viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; 4055 } 4056 break; 4057 case com.android.internal.R.styleable.View_clickable: 4058 if (a.getBoolean(attr, false)) { 4059 viewFlagValues |= CLICKABLE; 4060 viewFlagMasks |= CLICKABLE; 4061 } 4062 break; 4063 case com.android.internal.R.styleable.View_longClickable: 4064 if (a.getBoolean(attr, false)) { 4065 viewFlagValues |= LONG_CLICKABLE; 4066 viewFlagMasks |= LONG_CLICKABLE; 4067 } 4068 break; 4069 case com.android.internal.R.styleable.View_contextClickable: 4070 if (a.getBoolean(attr, false)) { 4071 viewFlagValues |= CONTEXT_CLICKABLE; 4072 viewFlagMasks |= CONTEXT_CLICKABLE; 4073 } 4074 break; 4075 case com.android.internal.R.styleable.View_saveEnabled: 4076 if (!a.getBoolean(attr, true)) { 4077 viewFlagValues |= SAVE_DISABLED; 4078 viewFlagMasks |= SAVE_DISABLED_MASK; 4079 } 4080 break; 4081 case com.android.internal.R.styleable.View_duplicateParentState: 4082 if (a.getBoolean(attr, false)) { 4083 viewFlagValues |= DUPLICATE_PARENT_STATE; 4084 viewFlagMasks |= DUPLICATE_PARENT_STATE; 4085 } 4086 break; 4087 case com.android.internal.R.styleable.View_visibility: 4088 final int visibility = a.getInt(attr, 0); 4089 if (visibility != 0) { 4090 viewFlagValues |= VISIBILITY_FLAGS[visibility]; 4091 viewFlagMasks |= VISIBILITY_MASK; 4092 } 4093 break; 4094 case com.android.internal.R.styleable.View_layoutDirection: 4095 // Clear any layout direction flags (included resolved bits) already set 4096 mPrivateFlags2 &= 4097 ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); 4098 // Set the layout direction flags depending on the value of the attribute 4099 final int layoutDirection = a.getInt(attr, -1); 4100 final int value = (layoutDirection != -1) ? 4101 LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; 4102 mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); 4103 break; 4104 case com.android.internal.R.styleable.View_drawingCacheQuality: 4105 final int cacheQuality = a.getInt(attr, 0); 4106 if (cacheQuality != 0) { 4107 viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; 4108 viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; 4109 } 4110 break; 4111 case com.android.internal.R.styleable.View_contentDescription: 4112 setContentDescription(a.getString(attr)); 4113 break; 4114 case com.android.internal.R.styleable.View_accessibilityTraversalBefore: 4115 setAccessibilityTraversalBefore(a.getResourceId(attr, NO_ID)); 4116 break; 4117 case com.android.internal.R.styleable.View_accessibilityTraversalAfter: 4118 setAccessibilityTraversalAfter(a.getResourceId(attr, NO_ID)); 4119 break; 4120 case com.android.internal.R.styleable.View_labelFor: 4121 setLabelFor(a.getResourceId(attr, NO_ID)); 4122 break; 4123 case com.android.internal.R.styleable.View_soundEffectsEnabled: 4124 if (!a.getBoolean(attr, true)) { 4125 viewFlagValues &= ~SOUND_EFFECTS_ENABLED; 4126 viewFlagMasks |= SOUND_EFFECTS_ENABLED; 4127 } 4128 break; 4129 case com.android.internal.R.styleable.View_hapticFeedbackEnabled: 4130 if (!a.getBoolean(attr, true)) { 4131 viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; 4132 viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; 4133 } 4134 break; 4135 case R.styleable.View_scrollbars: 4136 final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); 4137 if (scrollbars != SCROLLBARS_NONE) { 4138 viewFlagValues |= scrollbars; 4139 viewFlagMasks |= SCROLLBARS_MASK; 4140 initializeScrollbars = true; 4141 } 4142 break; 4143 //noinspection deprecation 4144 case R.styleable.View_fadingEdge: 4145 if (targetSdkVersion >= ICE_CREAM_SANDWICH) { 4146 // Ignore the attribute starting with ICS 4147 break; 4148 } 4149 // With builds < ICS, fall through and apply fading edges 4150 case R.styleable.View_requiresFadingEdge: 4151 final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); 4152 if (fadingEdge != FADING_EDGE_NONE) { 4153 viewFlagValues |= fadingEdge; 4154 viewFlagMasks |= FADING_EDGE_MASK; 4155 initializeFadingEdgeInternal(a); 4156 } 4157 break; 4158 case R.styleable.View_scrollbarStyle: 4159 scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); 4160 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4161 viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; 4162 viewFlagMasks |= SCROLLBARS_STYLE_MASK; 4163 } 4164 break; 4165 case R.styleable.View_isScrollContainer: 4166 setScrollContainer = true; 4167 if (a.getBoolean(attr, false)) { 4168 setScrollContainer(true); 4169 } 4170 break; 4171 case com.android.internal.R.styleable.View_keepScreenOn: 4172 if (a.getBoolean(attr, false)) { 4173 viewFlagValues |= KEEP_SCREEN_ON; 4174 viewFlagMasks |= KEEP_SCREEN_ON; 4175 } 4176 break; 4177 case R.styleable.View_filterTouchesWhenObscured: 4178 if (a.getBoolean(attr, false)) { 4179 viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; 4180 viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; 4181 } 4182 break; 4183 case R.styleable.View_nextFocusLeft: 4184 mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); 4185 break; 4186 case R.styleable.View_nextFocusRight: 4187 mNextFocusRightId = a.getResourceId(attr, View.NO_ID); 4188 break; 4189 case R.styleable.View_nextFocusUp: 4190 mNextFocusUpId = a.getResourceId(attr, View.NO_ID); 4191 break; 4192 case R.styleable.View_nextFocusDown: 4193 mNextFocusDownId = a.getResourceId(attr, View.NO_ID); 4194 break; 4195 case R.styleable.View_nextFocusForward: 4196 mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); 4197 break; 4198 case R.styleable.View_minWidth: 4199 mMinWidth = a.getDimensionPixelSize(attr, 0); 4200 break; 4201 case R.styleable.View_minHeight: 4202 mMinHeight = a.getDimensionPixelSize(attr, 0); 4203 break; 4204 case R.styleable.View_onClick: 4205 if (context.isRestricted()) { 4206 throw new IllegalStateException("The android:onClick attribute cannot " 4207 + "be used within a restricted context"); 4208 } 4209 4210 final String handlerName = a.getString(attr); 4211 if (handlerName != null) { 4212 setOnClickListener(new DeclaredOnClickListener(this, handlerName)); 4213 } 4214 break; 4215 case R.styleable.View_overScrollMode: 4216 overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); 4217 break; 4218 case R.styleable.View_verticalScrollbarPosition: 4219 mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); 4220 break; 4221 case R.styleable.View_layerType: 4222 setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); 4223 break; 4224 case R.styleable.View_textDirection: 4225 // Clear any text direction flag already set 4226 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 4227 // Set the text direction flags depending on the value of the attribute 4228 final int textDirection = a.getInt(attr, -1); 4229 if (textDirection != -1) { 4230 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; 4231 } 4232 break; 4233 case R.styleable.View_textAlignment: 4234 // Clear any text alignment flag already set 4235 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 4236 // Set the text alignment flag depending on the value of the attribute 4237 final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); 4238 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; 4239 break; 4240 case R.styleable.View_importantForAccessibility: 4241 setImportantForAccessibility(a.getInt(attr, 4242 IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); 4243 break; 4244 case R.styleable.View_accessibilityLiveRegion: 4245 setAccessibilityLiveRegion(a.getInt(attr, ACCESSIBILITY_LIVE_REGION_DEFAULT)); 4246 break; 4247 case R.styleable.View_transitionName: 4248 setTransitionName(a.getString(attr)); 4249 break; 4250 case R.styleable.View_nestedScrollingEnabled: 4251 setNestedScrollingEnabled(a.getBoolean(attr, false)); 4252 break; 4253 case R.styleable.View_stateListAnimator: 4254 setStateListAnimator(AnimatorInflater.loadStateListAnimator(context, 4255 a.getResourceId(attr, 0))); 4256 break; 4257 case R.styleable.View_backgroundTint: 4258 // This will get applied later during setBackground(). 4259 if (mBackgroundTint == null) { 4260 mBackgroundTint = new TintInfo(); 4261 } 4262 mBackgroundTint.mTintList = a.getColorStateList( 4263 R.styleable.View_backgroundTint); 4264 mBackgroundTint.mHasTintList = true; 4265 break; 4266 case R.styleable.View_backgroundTintMode: 4267 // This will get applied later during setBackground(). 4268 if (mBackgroundTint == null) { 4269 mBackgroundTint = new TintInfo(); 4270 } 4271 mBackgroundTint.mTintMode = Drawable.parseTintMode(a.getInt( 4272 R.styleable.View_backgroundTintMode, -1), null); 4273 mBackgroundTint.mHasTintMode = true; 4274 break; 4275 case R.styleable.View_outlineProvider: 4276 setOutlineProviderFromAttribute(a.getInt(R.styleable.View_outlineProvider, 4277 PROVIDER_BACKGROUND)); 4278 break; 4279 case R.styleable.View_foreground: 4280 if (targetSdkVersion >= VERSION_CODES.MNC || this instanceof FrameLayout) { 4281 setForeground(a.getDrawable(attr)); 4282 } 4283 break; 4284 case R.styleable.View_foregroundGravity: 4285 if (targetSdkVersion >= VERSION_CODES.MNC || this instanceof FrameLayout) { 4286 setForegroundGravity(a.getInt(attr, Gravity.NO_GRAVITY)); 4287 } 4288 break; 4289 case R.styleable.View_foregroundTintMode: 4290 if (targetSdkVersion >= VERSION_CODES.MNC || this instanceof FrameLayout) { 4291 setForegroundTintMode(Drawable.parseTintMode(a.getInt(attr, -1), null)); 4292 } 4293 break; 4294 case R.styleable.View_foregroundTint: 4295 if (targetSdkVersion >= VERSION_CODES.MNC || this instanceof FrameLayout) { 4296 setForegroundTintList(a.getColorStateList(attr)); 4297 } 4298 break; 4299 case R.styleable.View_foregroundInsidePadding: 4300 if (targetSdkVersion >= VERSION_CODES.MNC || this instanceof FrameLayout) { 4301 if (mForegroundInfo == null) { 4302 mForegroundInfo = new ForegroundInfo(); 4303 } 4304 mForegroundInfo.mInsidePadding = a.getBoolean(attr, 4305 mForegroundInfo.mInsidePadding); 4306 } 4307 break; 4308 case R.styleable.View_scrollIndicators: 4309 final int scrollIndicators = 4310 (a.getInt(attr, 0) << SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT) 4311 & SCROLL_INDICATORS_PFLAG3_MASK; 4312 if (scrollIndicators != 0) { 4313 mPrivateFlags3 |= scrollIndicators; 4314 initializeScrollIndicators = true; 4315 } 4316 break; 4317 } 4318 } 4319 4320 setOverScrollMode(overScrollMode); 4321 4322 // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet 4323 // the resolved layout direction). Those cached values will be used later during padding 4324 // resolution. 4325 mUserPaddingStart = startPadding; 4326 mUserPaddingEnd = endPadding; 4327 4328 if (background != null) { 4329 setBackground(background); 4330 } 4331 4332 // setBackground above will record that padding is currently provided by the background. 4333 // If we have padding specified via xml, record that here instead and use it. 4334 mLeftPaddingDefined = leftPaddingDefined; 4335 mRightPaddingDefined = rightPaddingDefined; 4336 4337 if (padding >= 0) { 4338 leftPadding = padding; 4339 topPadding = padding; 4340 rightPadding = padding; 4341 bottomPadding = padding; 4342 mUserPaddingLeftInitial = padding; 4343 mUserPaddingRightInitial = padding; 4344 } 4345 4346 if (isRtlCompatibilityMode()) { 4347 // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. 4348 // left / right padding are used if defined (meaning here nothing to do). If they are not 4349 // defined and start / end padding are defined (e.g. in Frameworks resources), then we use 4350 // start / end and resolve them as left / right (layout direction is not taken into account). 4351 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4352 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4353 // defined. 4354 if (!mLeftPaddingDefined && startPaddingDefined) { 4355 leftPadding = startPadding; 4356 } 4357 mUserPaddingLeftInitial = (leftPadding >= 0) ? leftPadding : mUserPaddingLeftInitial; 4358 if (!mRightPaddingDefined && endPaddingDefined) { 4359 rightPadding = endPadding; 4360 } 4361 mUserPaddingRightInitial = (rightPadding >= 0) ? rightPadding : mUserPaddingRightInitial; 4362 } else { 4363 // Jelly Bean MR1 and after case: if start/end defined, they will override any left/right 4364 // values defined. Otherwise, left /right values are used. 4365 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4366 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4367 // defined. 4368 final boolean hasRelativePadding = startPaddingDefined || endPaddingDefined; 4369 4370 if (mLeftPaddingDefined && !hasRelativePadding) { 4371 mUserPaddingLeftInitial = leftPadding; 4372 } 4373 if (mRightPaddingDefined && !hasRelativePadding) { 4374 mUserPaddingRightInitial = rightPadding; 4375 } 4376 } 4377 4378 internalSetPadding( 4379 mUserPaddingLeftInitial, 4380 topPadding >= 0 ? topPadding : mPaddingTop, 4381 mUserPaddingRightInitial, 4382 bottomPadding >= 0 ? bottomPadding : mPaddingBottom); 4383 4384 if (viewFlagMasks != 0) { 4385 setFlags(viewFlagValues, viewFlagMasks); 4386 } 4387 4388 if (initializeScrollbars) { 4389 initializeScrollbarsInternal(a); 4390 } 4391 4392 if (initializeScrollIndicators) { 4393 initializeScrollIndicatorsInternal(); 4394 } 4395 4396 a.recycle(); 4397 4398 // Needs to be called after mViewFlags is set 4399 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4400 recomputePadding(); 4401 } 4402 4403 if (x != 0 || y != 0) { 4404 scrollTo(x, y); 4405 } 4406 4407 if (transformSet) { 4408 setTranslationX(tx); 4409 setTranslationY(ty); 4410 setTranslationZ(tz); 4411 setElevation(elevation); 4412 setRotation(rotation); 4413 setRotationX(rotationX); 4414 setRotationY(rotationY); 4415 setScaleX(sx); 4416 setScaleY(sy); 4417 } 4418 4419 if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { 4420 setScrollContainer(true); 4421 } 4422 4423 computeOpaqueFlags(); 4424 } 4425 4426 /** 4427 * An implementation of OnClickListener that attempts to lazily load a 4428 * named click handling method from a parent or ancestor context. 4429 */ 4430 private static class DeclaredOnClickListener implements OnClickListener { 4431 private final View mHostView; 4432 private final String mMethodName; 4433 4434 private Method mMethod; 4435 4436 public DeclaredOnClickListener(@NonNull View hostView, @NonNull String methodName) { 4437 mHostView = hostView; 4438 mMethodName = methodName; 4439 } 4440 4441 @Override 4442 public void onClick(@NonNull View v) { 4443 if (mMethod == null) { 4444 mMethod = resolveMethod(mHostView.getContext(), mMethodName); 4445 } 4446 4447 try { 4448 mMethod.invoke(mHostView.getContext(), v); 4449 } catch (IllegalAccessException e) { 4450 throw new IllegalStateException( 4451 "Could not execute non-public method for android:onClick", e); 4452 } catch (InvocationTargetException e) { 4453 throw new IllegalStateException( 4454 "Could not execute method for android:onClick", e); 4455 } 4456 } 4457 4458 @NonNull 4459 private Method resolveMethod(@Nullable Context context, @NonNull String name) { 4460 while (context != null) { 4461 try { 4462 if (!context.isRestricted()) { 4463 return context.getClass().getMethod(mMethodName, View.class); 4464 } 4465 } catch (NoSuchMethodException e) { 4466 // Failed to find method, keep searching up the hierarchy. 4467 } 4468 4469 if (context instanceof ContextWrapper) { 4470 context = ((ContextWrapper) context).getBaseContext(); 4471 } else { 4472 // Can't search up the hierarchy, null out and fail. 4473 context = null; 4474 } 4475 } 4476 4477 final int id = mHostView.getId(); 4478 final String idText = id == NO_ID ? "" : " with id '" 4479 + mHostView.getContext().getResources().getResourceEntryName(id) + "'"; 4480 throw new IllegalStateException("Could not find method " + mMethodName 4481 + "(View) in a parent or ancestor Context for android:onClick " 4482 + "attribute defined on view " + mHostView.getClass() + idText); 4483 } 4484 } 4485 4486 /** 4487 * Non-public constructor for use in testing 4488 */ 4489 View() { 4490 mResources = null; 4491 mRenderNode = RenderNode.create(getClass().getName(), this); 4492 } 4493 4494 private static SparseArray<String> getAttributeMap() { 4495 if (mAttributeMap == null) { 4496 mAttributeMap = new SparseArray<>(); 4497 } 4498 return mAttributeMap; 4499 } 4500 4501 private void saveAttributeData(@Nullable AttributeSet attrs, @NonNull TypedArray t) { 4502 final int attrsCount = attrs == null ? 0 : attrs.getAttributeCount(); 4503 final int indexCount = t.getIndexCount(); 4504 final String[] attributes = new String[(attrsCount + indexCount) * 2]; 4505 4506 int i = 0; 4507 4508 // Store raw XML attributes. 4509 for (int j = 0; j < attrsCount; ++j) { 4510 attributes[i] = attrs.getAttributeName(j); 4511 attributes[i + 1] = attrs.getAttributeValue(j); 4512 i += 2; 4513 } 4514 4515 // Store resolved styleable attributes. 4516 final Resources res = t.getResources(); 4517 final SparseArray<String> attributeMap = getAttributeMap(); 4518 for (int j = 0; j < indexCount; ++j) { 4519 final int index = t.getIndex(j); 4520 if (!t.hasValueOrEmpty(index)) { 4521 // Value is undefined. Skip it. 4522 continue; 4523 } 4524 4525 final int resourceId = t.getResourceId(index, 0); 4526 if (resourceId == 0) { 4527 // Value is not a reference. Skip it. 4528 continue; 4529 } 4530 4531 String resourceName = attributeMap.get(resourceId); 4532 if (resourceName == null) { 4533 try { 4534 resourceName = res.getResourceName(resourceId); 4535 } catch (Resources.NotFoundException e) { 4536 resourceName = "0x" + Integer.toHexString(resourceId); 4537 } 4538 attributeMap.put(resourceId, resourceName); 4539 } 4540 4541 attributes[i] = resourceName; 4542 attributes[i + 1] = t.getString(index); 4543 i += 2; 4544 } 4545 4546 // Trim to fit contents. 4547 final String[] trimmed = new String[i]; 4548 System.arraycopy(attributes, 0, trimmed, 0, i); 4549 mAttributes = trimmed; 4550 } 4551 4552 public String toString() { 4553 StringBuilder out = new StringBuilder(128); 4554 out.append(getClass().getName()); 4555 out.append('{'); 4556 out.append(Integer.toHexString(System.identityHashCode(this))); 4557 out.append(' '); 4558 switch (mViewFlags&VISIBILITY_MASK) { 4559 case VISIBLE: out.append('V'); break; 4560 case INVISIBLE: out.append('I'); break; 4561 case GONE: out.append('G'); break; 4562 default: out.append('.'); break; 4563 } 4564 out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); 4565 out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); 4566 out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); 4567 out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); 4568 out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); 4569 out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); 4570 out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); 4571 out.append((mViewFlags&CONTEXT_CLICKABLE) != 0 ? 'X' : '.'); 4572 out.append(' '); 4573 out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); 4574 out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); 4575 out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); 4576 if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { 4577 out.append('p'); 4578 } else { 4579 out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); 4580 } 4581 out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); 4582 out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); 4583 out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); 4584 out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); 4585 out.append(' '); 4586 out.append(mLeft); 4587 out.append(','); 4588 out.append(mTop); 4589 out.append('-'); 4590 out.append(mRight); 4591 out.append(','); 4592 out.append(mBottom); 4593 final int id = getId(); 4594 if (id != NO_ID) { 4595 out.append(" #"); 4596 out.append(Integer.toHexString(id)); 4597 final Resources r = mResources; 4598 if (Resources.resourceHasPackage(id) && r != null) { 4599 try { 4600 String pkgname; 4601 switch (id&0xff000000) { 4602 case 0x7f000000: 4603 pkgname="app"; 4604 break; 4605 case 0x01000000: 4606 pkgname="android"; 4607 break; 4608 default: 4609 pkgname = r.getResourcePackageName(id); 4610 break; 4611 } 4612 String typename = r.getResourceTypeName(id); 4613 String entryname = r.getResourceEntryName(id); 4614 out.append(" "); 4615 out.append(pkgname); 4616 out.append(":"); 4617 out.append(typename); 4618 out.append("/"); 4619 out.append(entryname); 4620 } catch (Resources.NotFoundException e) { 4621 } 4622 } 4623 } 4624 out.append("}"); 4625 return out.toString(); 4626 } 4627 4628 /** 4629 * <p> 4630 * Initializes the fading edges from a given set of styled attributes. This 4631 * method should be called by subclasses that need fading edges and when an 4632 * instance of these subclasses is created programmatically rather than 4633 * being inflated from XML. This method is automatically called when the XML 4634 * is inflated. 4635 * </p> 4636 * 4637 * @param a the styled attributes set to initialize the fading edges from 4638 * 4639 * @removed 4640 */ 4641 protected void initializeFadingEdge(TypedArray a) { 4642 // This method probably shouldn't have been included in the SDK to begin with. 4643 // It relies on 'a' having been initialized using an attribute filter array that is 4644 // not publicly available to the SDK. The old method has been renamed 4645 // to initializeFadingEdgeInternal and hidden for framework use only; 4646 // this one initializes using defaults to make it safe to call for apps. 4647 4648 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4649 4650 initializeFadingEdgeInternal(arr); 4651 4652 arr.recycle(); 4653 } 4654 4655 /** 4656 * <p> 4657 * Initializes the fading edges from a given set of styled attributes. This 4658 * method should be called by subclasses that need fading edges and when an 4659 * instance of these subclasses is created programmatically rather than 4660 * being inflated from XML. This method is automatically called when the XML 4661 * is inflated. 4662 * </p> 4663 * 4664 * @param a the styled attributes set to initialize the fading edges from 4665 * @hide This is the real method; the public one is shimmed to be safe to call from apps. 4666 */ 4667 protected void initializeFadingEdgeInternal(TypedArray a) { 4668 initScrollCache(); 4669 4670 mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( 4671 R.styleable.View_fadingEdgeLength, 4672 ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); 4673 } 4674 4675 /** 4676 * Returns the size of the vertical faded edges used to indicate that more 4677 * content in this view is visible. 4678 * 4679 * @return The size in pixels of the vertical faded edge or 0 if vertical 4680 * faded edges are not enabled for this view. 4681 * @attr ref android.R.styleable#View_fadingEdgeLength 4682 */ 4683 public int getVerticalFadingEdgeLength() { 4684 if (isVerticalFadingEdgeEnabled()) { 4685 ScrollabilityCache cache = mScrollCache; 4686 if (cache != null) { 4687 return cache.fadingEdgeLength; 4688 } 4689 } 4690 return 0; 4691 } 4692 4693 /** 4694 * Set the size of the faded edge used to indicate that more content in this 4695 * view is available. Will not change whether the fading edge is enabled; use 4696 * {@link #setVerticalFadingEdgeEnabled(boolean)} or 4697 * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge 4698 * for the vertical or horizontal fading edges. 4699 * 4700 * @param length The size in pixels of the faded edge used to indicate that more 4701 * content in this view is visible. 4702 */ 4703 public void setFadingEdgeLength(int length) { 4704 initScrollCache(); 4705 mScrollCache.fadingEdgeLength = length; 4706 } 4707 4708 /** 4709 * Returns the size of the horizontal faded edges used to indicate that more 4710 * content in this view is visible. 4711 * 4712 * @return The size in pixels of the horizontal faded edge or 0 if horizontal 4713 * faded edges are not enabled for this view. 4714 * @attr ref android.R.styleable#View_fadingEdgeLength 4715 */ 4716 public int getHorizontalFadingEdgeLength() { 4717 if (isHorizontalFadingEdgeEnabled()) { 4718 ScrollabilityCache cache = mScrollCache; 4719 if (cache != null) { 4720 return cache.fadingEdgeLength; 4721 } 4722 } 4723 return 0; 4724 } 4725 4726 /** 4727 * Returns the width of the vertical scrollbar. 4728 * 4729 * @return The width in pixels of the vertical scrollbar or 0 if there 4730 * is no vertical scrollbar. 4731 */ 4732 public int getVerticalScrollbarWidth() { 4733 ScrollabilityCache cache = mScrollCache; 4734 if (cache != null) { 4735 ScrollBarDrawable scrollBar = cache.scrollBar; 4736 if (scrollBar != null) { 4737 int size = scrollBar.getSize(true); 4738 if (size <= 0) { 4739 size = cache.scrollBarSize; 4740 } 4741 return size; 4742 } 4743 return 0; 4744 } 4745 return 0; 4746 } 4747 4748 /** 4749 * Returns the height of the horizontal scrollbar. 4750 * 4751 * @return The height in pixels of the horizontal scrollbar or 0 if 4752 * there is no horizontal scrollbar. 4753 */ 4754 protected int getHorizontalScrollbarHeight() { 4755 ScrollabilityCache cache = mScrollCache; 4756 if (cache != null) { 4757 ScrollBarDrawable scrollBar = cache.scrollBar; 4758 if (scrollBar != null) { 4759 int size = scrollBar.getSize(false); 4760 if (size <= 0) { 4761 size = cache.scrollBarSize; 4762 } 4763 return size; 4764 } 4765 return 0; 4766 } 4767 return 0; 4768 } 4769 4770 /** 4771 * <p> 4772 * Initializes the scrollbars from a given set of styled attributes. This 4773 * method should be called by subclasses that need scrollbars and when an 4774 * instance of these subclasses is created programmatically rather than 4775 * being inflated from XML. This method is automatically called when the XML 4776 * is inflated. 4777 * </p> 4778 * 4779 * @param a the styled attributes set to initialize the scrollbars from 4780 * 4781 * @removed 4782 */ 4783 protected void initializeScrollbars(TypedArray a) { 4784 // It's not safe to use this method from apps. The parameter 'a' must have been obtained 4785 // using the View filter array which is not available to the SDK. As such, internal 4786 // framework usage now uses initializeScrollbarsInternal and we grab a default 4787 // TypedArray with the right filter instead here. 4788 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4789 4790 initializeScrollbarsInternal(arr); 4791 4792 // We ignored the method parameter. Recycle the one we actually did use. 4793 arr.recycle(); 4794 } 4795 4796 /** 4797 * <p> 4798 * Initializes the scrollbars from a given set of styled attributes. This 4799 * method should be called by subclasses that need scrollbars and when an 4800 * instance of these subclasses is created programmatically rather than 4801 * being inflated from XML. This method is automatically called when the XML 4802 * is inflated. 4803 * </p> 4804 * 4805 * @param a the styled attributes set to initialize the scrollbars from 4806 * @hide 4807 */ 4808 protected void initializeScrollbarsInternal(TypedArray a) { 4809 initScrollCache(); 4810 4811 final ScrollabilityCache scrollabilityCache = mScrollCache; 4812 4813 if (scrollabilityCache.scrollBar == null) { 4814 scrollabilityCache.scrollBar = new ScrollBarDrawable(); 4815 scrollabilityCache.scrollBar.setCallback(this); 4816 scrollabilityCache.scrollBar.setState(getDrawableState()); 4817 } 4818 4819 final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); 4820 4821 if (!fadeScrollbars) { 4822 scrollabilityCache.state = ScrollabilityCache.ON; 4823 } 4824 scrollabilityCache.fadeScrollBars = fadeScrollbars; 4825 4826 4827 scrollabilityCache.scrollBarFadeDuration = a.getInt( 4828 R.styleable.View_scrollbarFadeDuration, ViewConfiguration 4829 .getScrollBarFadeDuration()); 4830 scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( 4831 R.styleable.View_scrollbarDefaultDelayBeforeFade, 4832 ViewConfiguration.getScrollDefaultDelay()); 4833 4834 4835 scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( 4836 com.android.internal.R.styleable.View_scrollbarSize, 4837 ViewConfiguration.get(mContext).getScaledScrollBarSize()); 4838 4839 Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); 4840 scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); 4841 4842 Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); 4843 if (thumb != null) { 4844 scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); 4845 } 4846 4847 boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, 4848 false); 4849 if (alwaysDraw) { 4850 scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); 4851 } 4852 4853 track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); 4854 scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); 4855 4856 thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); 4857 if (thumb != null) { 4858 scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); 4859 } 4860 4861 alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, 4862 false); 4863 if (alwaysDraw) { 4864 scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); 4865 } 4866 4867 // Apply layout direction to the new Drawables if needed 4868 final int layoutDirection = getLayoutDirection(); 4869 if (track != null) { 4870 track.setLayoutDirection(layoutDirection); 4871 } 4872 if (thumb != null) { 4873 thumb.setLayoutDirection(layoutDirection); 4874 } 4875 4876 // Re-apply user/background padding so that scrollbar(s) get added 4877 resolvePadding(); 4878 } 4879 4880 private void initializeScrollIndicatorsInternal() { 4881 // Some day maybe we'll break this into top/left/start/etc. and let the 4882 // client control it. Until then, you can have any scroll indicator you 4883 // want as long as it's a 1dp foreground-colored rectangle. 4884 if (mScrollIndicatorDrawable == null) { 4885 mScrollIndicatorDrawable = mContext.getDrawable(R.drawable.scroll_indicator_material); 4886 } 4887 } 4888 4889 /** 4890 * <p> 4891 * Initalizes the scrollability cache if necessary. 4892 * </p> 4893 */ 4894 private void initScrollCache() { 4895 if (mScrollCache == null) { 4896 mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); 4897 } 4898 } 4899 4900 private ScrollabilityCache getScrollCache() { 4901 initScrollCache(); 4902 return mScrollCache; 4903 } 4904 4905 /** 4906 * Set the position of the vertical scroll bar. Should be one of 4907 * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or 4908 * {@link #SCROLLBAR_POSITION_RIGHT}. 4909 * 4910 * @param position Where the vertical scroll bar should be positioned. 4911 */ 4912 public void setVerticalScrollbarPosition(int position) { 4913 if (mVerticalScrollbarPosition != position) { 4914 mVerticalScrollbarPosition = position; 4915 computeOpaqueFlags(); 4916 resolvePadding(); 4917 } 4918 } 4919 4920 /** 4921 * @return The position where the vertical scroll bar will show, if applicable. 4922 * @see #setVerticalScrollbarPosition(int) 4923 */ 4924 public int getVerticalScrollbarPosition() { 4925 return mVerticalScrollbarPosition; 4926 } 4927 4928 /** 4929 * Sets the state of all scroll indicators. 4930 * <p> 4931 * See {@link #setScrollIndicators(int, int)} for usage information. 4932 * 4933 * @param indicators a bitmask of indicators that should be enabled, or 4934 * {@code 0} to disable all indicators 4935 * @see #setScrollIndicators(int, int) 4936 * @see #getScrollIndicators() 4937 * @attr ref android.R.styleable#View_scrollIndicators 4938 */ 4939 public void setScrollIndicators(@ScrollIndicators int indicators) { 4940 setScrollIndicators(indicators, 4941 SCROLL_INDICATORS_PFLAG3_MASK >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT); 4942 } 4943 4944 /** 4945 * Sets the state of the scroll indicators specified by the mask. To change 4946 * all scroll indicators at once, see {@link #setScrollIndicators(int)}. 4947 * <p> 4948 * When a scroll indicator is enabled, it will be displayed if the view 4949 * can scroll in the direction of the indicator. 4950 * <p> 4951 * Multiple indicator types may be enabled or disabled by passing the 4952 * logical OR of the desired types. If multiple types are specified, they 4953 * will all be set to the same enabled state. 4954 * <p> 4955 * For example, to enable the top scroll indicatorExample: {@code setScrollIndicators 4956 * 4957 * @param indicators the indicator direction, or the logical OR of multiple 4958 * indicator directions. One or more of: 4959 * <ul> 4960 * <li>{@link #SCROLL_INDICATOR_TOP}</li> 4961 * <li>{@link #SCROLL_INDICATOR_BOTTOM}</li> 4962 * <li>{@link #SCROLL_INDICATOR_LEFT}</li> 4963 * <li>{@link #SCROLL_INDICATOR_RIGHT}</li> 4964 * <li>{@link #SCROLL_INDICATOR_START}</li> 4965 * <li>{@link #SCROLL_INDICATOR_END}</li> 4966 * </ul> 4967 * @see #setScrollIndicators(int) 4968 * @see #getScrollIndicators() 4969 * @attr ref android.R.styleable#View_scrollIndicators 4970 */ 4971 public void setScrollIndicators(@ScrollIndicators int indicators, @ScrollIndicators int mask) { 4972 // Shift and sanitize mask. 4973 mask <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 4974 mask &= SCROLL_INDICATORS_PFLAG3_MASK; 4975 4976 // Shift and mask indicators. 4977 indicators <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 4978 indicators &= mask; 4979 4980 // Merge with non-masked flags. 4981 final int updatedFlags = indicators | (mPrivateFlags3 & ~mask); 4982 4983 if (mPrivateFlags3 != updatedFlags) { 4984 mPrivateFlags3 = updatedFlags; 4985 4986 if (indicators != 0) { 4987 initializeScrollIndicatorsInternal(); 4988 } 4989 invalidate(); 4990 } 4991 } 4992 4993 /** 4994 * Returns a bitmask representing the enabled scroll indicators. 4995 * <p> 4996 * For example, if the top and left scroll indicators are enabled and all 4997 * other indicators are disabled, the return value will be 4998 * {@code View.SCROLL_INDICATOR_TOP | View.SCROLL_INDICATOR_LEFT}. 4999 * <p> 5000 * To check whether the bottom scroll indicator is enabled, use the value 5001 * of {@code (getScrollIndicators() & View.SCROLL_INDICATOR_BOTTOM) != 0}. 5002 * 5003 * @return a bitmask representing the enabled scroll indicators 5004 */ 5005 @ScrollIndicators 5006 public int getScrollIndicators() { 5007 return (mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) 5008 >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 5009 } 5010 5011 ListenerInfo getListenerInfo() { 5012 if (mListenerInfo != null) { 5013 return mListenerInfo; 5014 } 5015 mListenerInfo = new ListenerInfo(); 5016 return mListenerInfo; 5017 } 5018 5019 /** 5020 * Register a callback to be invoked when the scroll X or Y positions of 5021 * this view change. 5022 * <p> 5023 * <b>Note:</b> Some views handle scrolling independently from View and may 5024 * have their own separate listeners for scroll-type events. For example, 5025 * {@link android.widget.ListView ListView} allows clients to register an 5026 * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} 5027 * to listen for changes in list scroll position. 5028 * 5029 * @param l The listener to notify when the scroll X or Y position changes. 5030 * @see android.view.View#getScrollX() 5031 * @see android.view.View#getScrollY() 5032 */ 5033 public void setOnScrollChangeListener(OnScrollChangeListener l) { 5034 getListenerInfo().mOnScrollChangeListener = l; 5035 } 5036 5037 /** 5038 * Register a callback to be invoked when focus of this view changed. 5039 * 5040 * @param l The callback that will run. 5041 */ 5042 public void setOnFocusChangeListener(OnFocusChangeListener l) { 5043 getListenerInfo().mOnFocusChangeListener = l; 5044 } 5045 5046 /** 5047 * Add a listener that will be called when the bounds of the view change due to 5048 * layout processing. 5049 * 5050 * @param listener The listener that will be called when layout bounds change. 5051 */ 5052 public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { 5053 ListenerInfo li = getListenerInfo(); 5054 if (li.mOnLayoutChangeListeners == null) { 5055 li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); 5056 } 5057 if (!li.mOnLayoutChangeListeners.contains(listener)) { 5058 li.mOnLayoutChangeListeners.add(listener); 5059 } 5060 } 5061 5062 /** 5063 * Remove a listener for layout changes. 5064 * 5065 * @param listener The listener for layout bounds change. 5066 */ 5067 public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { 5068 ListenerInfo li = mListenerInfo; 5069 if (li == null || li.mOnLayoutChangeListeners == null) { 5070 return; 5071 } 5072 li.mOnLayoutChangeListeners.remove(listener); 5073 } 5074 5075 /** 5076 * Add a listener for attach state changes. 5077 * 5078 * This listener will be called whenever this view is attached or detached 5079 * from a window. Remove the listener using 5080 * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. 5081 * 5082 * @param listener Listener to attach 5083 * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) 5084 */ 5085 public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 5086 ListenerInfo li = getListenerInfo(); 5087 if (li.mOnAttachStateChangeListeners == null) { 5088 li.mOnAttachStateChangeListeners 5089 = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); 5090 } 5091 li.mOnAttachStateChangeListeners.add(listener); 5092 } 5093 5094 /** 5095 * Remove a listener for attach state changes. The listener will receive no further 5096 * notification of window attach/detach events. 5097 * 5098 * @param listener Listener to remove 5099 * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) 5100 */ 5101 public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 5102 ListenerInfo li = mListenerInfo; 5103 if (li == null || li.mOnAttachStateChangeListeners == null) { 5104 return; 5105 } 5106 li.mOnAttachStateChangeListeners.remove(listener); 5107 } 5108 5109 /** 5110 * Returns the focus-change callback registered for this view. 5111 * 5112 * @return The callback, or null if one is not registered. 5113 */ 5114 public OnFocusChangeListener getOnFocusChangeListener() { 5115 ListenerInfo li = mListenerInfo; 5116 return li != null ? li.mOnFocusChangeListener : null; 5117 } 5118 5119 /** 5120 * Register a callback to be invoked when this view is clicked. If this view is not 5121 * clickable, it becomes clickable. 5122 * 5123 * @param l The callback that will run 5124 * 5125 * @see #setClickable(boolean) 5126 */ 5127 public void setOnClickListener(@Nullable OnClickListener l) { 5128 if (!isClickable()) { 5129 setClickable(true); 5130 } 5131 getListenerInfo().mOnClickListener = l; 5132 } 5133 5134 /** 5135 * Return whether this view has an attached OnClickListener. Returns 5136 * true if there is a listener, false if there is none. 5137 */ 5138 public boolean hasOnClickListeners() { 5139 ListenerInfo li = mListenerInfo; 5140 return (li != null && li.mOnClickListener != null); 5141 } 5142 5143 /** 5144 * Register a callback to be invoked when this view is clicked and held. If this view is not 5145 * long clickable, it becomes long clickable. 5146 * 5147 * @param l The callback that will run 5148 * 5149 * @see #setLongClickable(boolean) 5150 */ 5151 public void setOnLongClickListener(@Nullable OnLongClickListener l) { 5152 if (!isLongClickable()) { 5153 setLongClickable(true); 5154 } 5155 getListenerInfo().mOnLongClickListener = l; 5156 } 5157 5158 /** 5159 * Register a callback to be invoked when this view is context clicked. If the view is not 5160 * context clickable, it becomes context clickable. 5161 * 5162 * @param l The callback that will run 5163 * @see #setContextClickable(boolean) 5164 */ 5165 public void setOnContextClickListener(@Nullable OnContextClickListener l) { 5166 if (!isContextClickable()) { 5167 setContextClickable(true); 5168 } 5169 getListenerInfo().mOnContextClickListener = l; 5170 } 5171 5172 /** 5173 * Register a callback to be invoked when the context menu for this view is 5174 * being built. If this view is not long clickable, it becomes long clickable. 5175 * 5176 * @param l The callback that will run 5177 * 5178 */ 5179 public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { 5180 if (!isLongClickable()) { 5181 setLongClickable(true); 5182 } 5183 getListenerInfo().mOnCreateContextMenuListener = l; 5184 } 5185 5186 /** 5187 * Call this view's OnClickListener, if it is defined. Performs all normal 5188 * actions associated with clicking: reporting accessibility event, playing 5189 * a sound, etc. 5190 * 5191 * @return True there was an assigned OnClickListener that was called, false 5192 * otherwise is returned. 5193 */ 5194 public boolean performClick() { 5195 final boolean result; 5196 final ListenerInfo li = mListenerInfo; 5197 if (li != null && li.mOnClickListener != null) { 5198 playSoundEffect(SoundEffectConstants.CLICK); 5199 li.mOnClickListener.onClick(this); 5200 result = true; 5201 } else { 5202 result = false; 5203 } 5204 5205 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 5206 return result; 5207 } 5208 5209 /** 5210 * Directly call any attached OnClickListener. Unlike {@link #performClick()}, 5211 * this only calls the listener, and does not do any associated clicking 5212 * actions like reporting an accessibility event. 5213 * 5214 * @return True there was an assigned OnClickListener that was called, false 5215 * otherwise is returned. 5216 */ 5217 public boolean callOnClick() { 5218 ListenerInfo li = mListenerInfo; 5219 if (li != null && li.mOnClickListener != null) { 5220 li.mOnClickListener.onClick(this); 5221 return true; 5222 } 5223 return false; 5224 } 5225 5226 /** 5227 * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the 5228 * OnLongClickListener did not consume the event. 5229 * 5230 * @return True if one of the above receivers consumed the event, false otherwise. 5231 */ 5232 public boolean performLongClick() { 5233 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); 5234 5235 boolean handled = false; 5236 ListenerInfo li = mListenerInfo; 5237 if (li != null && li.mOnLongClickListener != null) { 5238 handled = li.mOnLongClickListener.onLongClick(View.this); 5239 } 5240 if (!handled) { 5241 handled = showContextMenu(); 5242 } 5243 if (handled) { 5244 performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 5245 } 5246 return handled; 5247 } 5248 5249 /** 5250 * Call this view's OnContextClickListener, if it is defined. 5251 * 5252 * @return True if there was an assigned OnContextClickListener that consumed the event, false 5253 * otherwise. 5254 */ 5255 public boolean performContextClick() { 5256 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED); 5257 5258 boolean handled = false; 5259 ListenerInfo li = mListenerInfo; 5260 if (li != null && li.mOnContextClickListener != null) { 5261 handled = li.mOnContextClickListener.onContextClick(View.this); 5262 } 5263 if (handled) { 5264 performHapticFeedback(HapticFeedbackConstants.CONTEXT_CLICK); 5265 } 5266 return handled; 5267 } 5268 5269 /** 5270 * Performs button-related actions during a touch down event. 5271 * 5272 * @param event The event. 5273 * @return True if the down was consumed. 5274 * 5275 * @hide 5276 */ 5277 protected boolean performButtonActionOnTouchDown(MotionEvent event) { 5278 if (event.getToolType(0) == MotionEvent.TOOL_TYPE_MOUSE && 5279 (event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { 5280 showContextMenu(event.getX(), event.getY(), event.getMetaState()); 5281 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 5282 return true; 5283 } 5284 return false; 5285 } 5286 5287 /** 5288 * Bring up the context menu for this view. 5289 * 5290 * @return Whether a context menu was displayed. 5291 */ 5292 public boolean showContextMenu() { 5293 return getParent().showContextMenuForChild(this); 5294 } 5295 5296 /** 5297 * Bring up the context menu for this view, referring to the item under the specified point. 5298 * 5299 * @param x The referenced x coordinate. 5300 * @param y The referenced y coordinate. 5301 * @param metaState The keyboard modifiers that were pressed. 5302 * @return Whether a context menu was displayed. 5303 * 5304 * @hide 5305 */ 5306 public boolean showContextMenu(float x, float y, int metaState) { 5307 return showContextMenu(); 5308 } 5309 5310 /** 5311 * Start an action mode with the default type {@link ActionMode#TYPE_PRIMARY}. 5312 * 5313 * @param callback Callback that will control the lifecycle of the action mode 5314 * @return The new action mode if it is started, null otherwise 5315 * 5316 * @see ActionMode 5317 * @see #startActionMode(android.view.ActionMode.Callback, int) 5318 */ 5319 public ActionMode startActionMode(ActionMode.Callback callback) { 5320 return startActionMode(callback, ActionMode.TYPE_PRIMARY); 5321 } 5322 5323 /** 5324 * Start an action mode with the given type. 5325 * 5326 * @param callback Callback that will control the lifecycle of the action mode 5327 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 5328 * @return The new action mode if it is started, null otherwise 5329 * 5330 * @see ActionMode 5331 */ 5332 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 5333 ViewParent parent = getParent(); 5334 if (parent == null) return null; 5335 try { 5336 return parent.startActionModeForChild(this, callback, type); 5337 } catch (AbstractMethodError ame) { 5338 // Older implementations of custom views might not implement this. 5339 return parent.startActionModeForChild(this, callback); 5340 } 5341 } 5342 5343 /** 5344 * Call {@link Context#startActivityForResult(String, Intent, int, Bundle)} for the View's 5345 * Context, creating a unique View identifier to retrieve the result. 5346 * 5347 * @param intent The Intent to be started. 5348 * @param requestCode The request code to use. 5349 * @hide 5350 */ 5351 public void startActivityForResult(Intent intent, int requestCode) { 5352 mStartActivityRequestWho = "@android:view:" + System.identityHashCode(this); 5353 getContext().startActivityForResult(mStartActivityRequestWho, intent, requestCode, null); 5354 } 5355 5356 /** 5357 * If this View corresponds to the calling who, dispatches the activity result. 5358 * @param who The identifier for the targeted View to receive the result. 5359 * @param requestCode The integer request code originally supplied to 5360 * startActivityForResult(), allowing you to identify who this 5361 * result came from. 5362 * @param resultCode The integer result code returned by the child activity 5363 * through its setResult(). 5364 * @param data An Intent, which can return result data to the caller 5365 * (various data can be attached to Intent "extras"). 5366 * @return {@code true} if the activity result was dispatched. 5367 * @hide 5368 */ 5369 public boolean dispatchActivityResult( 5370 String who, int requestCode, int resultCode, Intent data) { 5371 if (mStartActivityRequestWho != null && mStartActivityRequestWho.equals(who)) { 5372 onActivityResult(requestCode, resultCode, data); 5373 mStartActivityRequestWho = null; 5374 return true; 5375 } 5376 return false; 5377 } 5378 5379 /** 5380 * Receive the result from a previous call to {@link #startActivityForResult(Intent, int)}. 5381 * 5382 * @param requestCode The integer request code originally supplied to 5383 * startActivityForResult(), allowing you to identify who this 5384 * result came from. 5385 * @param resultCode The integer result code returned by the child activity 5386 * through its setResult(). 5387 * @param data An Intent, which can return result data to the caller 5388 * (various data can be attached to Intent "extras"). 5389 * @hide 5390 */ 5391 public void onActivityResult(int requestCode, int resultCode, Intent data) { 5392 // Do nothing. 5393 } 5394 5395 /** 5396 * Register a callback to be invoked when a hardware key is pressed in this view. 5397 * Key presses in software input methods will generally not trigger the methods of 5398 * this listener. 5399 * @param l the key listener to attach to this view 5400 */ 5401 public void setOnKeyListener(OnKeyListener l) { 5402 getListenerInfo().mOnKeyListener = l; 5403 } 5404 5405 /** 5406 * Register a callback to be invoked when a touch event is sent to this view. 5407 * @param l the touch listener to attach to this view 5408 */ 5409 public void setOnTouchListener(OnTouchListener l) { 5410 getListenerInfo().mOnTouchListener = l; 5411 } 5412 5413 /** 5414 * Register a callback to be invoked when a generic motion event is sent to this view. 5415 * @param l the generic motion listener to attach to this view 5416 */ 5417 public void setOnGenericMotionListener(OnGenericMotionListener l) { 5418 getListenerInfo().mOnGenericMotionListener = l; 5419 } 5420 5421 /** 5422 * Register a callback to be invoked when a hover event is sent to this view. 5423 * @param l the hover listener to attach to this view 5424 */ 5425 public void setOnHoverListener(OnHoverListener l) { 5426 getListenerInfo().mOnHoverListener = l; 5427 } 5428 5429 /** 5430 * Register a drag event listener callback object for this View. The parameter is 5431 * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a 5432 * View, the system calls the 5433 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. 5434 * @param l An implementation of {@link android.view.View.OnDragListener}. 5435 */ 5436 public void setOnDragListener(OnDragListener l) { 5437 getListenerInfo().mOnDragListener = l; 5438 } 5439 5440 /** 5441 * Give this view focus. This will cause 5442 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. 5443 * 5444 * Note: this does not check whether this {@link View} should get focus, it just 5445 * gives it focus no matter what. It should only be called internally by framework 5446 * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. 5447 * 5448 * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, 5449 * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which 5450 * focus moved when requestFocus() is called. It may not always 5451 * apply, in which case use the default View.FOCUS_DOWN. 5452 * @param previouslyFocusedRect The rectangle of the view that had focus 5453 * prior in this View's coordinate system. 5454 */ 5455 void handleFocusGainInternal(@FocusRealDirection int direction, Rect previouslyFocusedRect) { 5456 if (DBG) { 5457 System.out.println(this + " requestFocus()"); 5458 } 5459 5460 if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { 5461 mPrivateFlags |= PFLAG_FOCUSED; 5462 5463 View oldFocus = (mAttachInfo != null) ? getRootView().findFocus() : null; 5464 5465 if (mParent != null) { 5466 mParent.requestChildFocus(this, this); 5467 } 5468 5469 if (mAttachInfo != null) { 5470 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, this); 5471 } 5472 5473 onFocusChanged(true, direction, previouslyFocusedRect); 5474 refreshDrawableState(); 5475 } 5476 } 5477 5478 /** 5479 * Populates <code>outRect</code> with the hotspot bounds. By default, 5480 * the hotspot bounds are identical to the screen bounds. 5481 * 5482 * @param outRect rect to populate with hotspot bounds 5483 * @hide Only for internal use by views and widgets. 5484 */ 5485 public void getHotspotBounds(Rect outRect) { 5486 final Drawable background = getBackground(); 5487 if (background != null) { 5488 background.getHotspotBounds(outRect); 5489 } else { 5490 getBoundsOnScreen(outRect); 5491 } 5492 } 5493 5494 /** 5495 * Request that a rectangle of this view be visible on the screen, 5496 * scrolling if necessary just enough. 5497 * 5498 * <p>A View should call this if it maintains some notion of which part 5499 * of its content is interesting. For example, a text editing view 5500 * should call this when its cursor moves. 5501 * 5502 * @param rectangle The rectangle. 5503 * @return Whether any parent scrolled. 5504 */ 5505 public boolean requestRectangleOnScreen(Rect rectangle) { 5506 return requestRectangleOnScreen(rectangle, false); 5507 } 5508 5509 /** 5510 * Request that a rectangle of this view be visible on the screen, 5511 * scrolling if necessary just enough. 5512 * 5513 * <p>A View should call this if it maintains some notion of which part 5514 * of its content is interesting. For example, a text editing view 5515 * should call this when its cursor moves. 5516 * 5517 * <p>When <code>immediate</code> is set to true, scrolling will not be 5518 * animated. 5519 * 5520 * @param rectangle The rectangle. 5521 * @param immediate True to forbid animated scrolling, false otherwise 5522 * @return Whether any parent scrolled. 5523 */ 5524 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 5525 if (mParent == null) { 5526 return false; 5527 } 5528 5529 View child = this; 5530 5531 RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); 5532 position.set(rectangle); 5533 5534 ViewParent parent = mParent; 5535 boolean scrolled = false; 5536 while (parent != null) { 5537 rectangle.set((int) position.left, (int) position.top, 5538 (int) position.right, (int) position.bottom); 5539 5540 scrolled |= parent.requestChildRectangleOnScreen(child, 5541 rectangle, immediate); 5542 5543 if (!child.hasIdentityMatrix()) { 5544 child.getMatrix().mapRect(position); 5545 } 5546 5547 position.offset(child.mLeft, child.mTop); 5548 5549 if (!(parent instanceof View)) { 5550 break; 5551 } 5552 5553 View parentView = (View) parent; 5554 5555 position.offset(-parentView.getScrollX(), -parentView.getScrollY()); 5556 5557 child = parentView; 5558 parent = child.getParent(); 5559 } 5560 5561 return scrolled; 5562 } 5563 5564 /** 5565 * Called when this view wants to give up focus. If focus is cleared 5566 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. 5567 * <p> 5568 * <strong>Note:</strong> When a View clears focus the framework is trying 5569 * to give focus to the first focusable View from the top. Hence, if this 5570 * View is the first from the top that can take focus, then all callbacks 5571 * related to clearing focus will be invoked after which the framework will 5572 * give focus to this view. 5573 * </p> 5574 */ 5575 public void clearFocus() { 5576 if (DBG) { 5577 System.out.println(this + " clearFocus()"); 5578 } 5579 5580 clearFocusInternal(null, true, true); 5581 } 5582 5583 /** 5584 * Clears focus from the view, optionally propagating the change up through 5585 * the parent hierarchy and requesting that the root view place new focus. 5586 * 5587 * @param propagate whether to propagate the change up through the parent 5588 * hierarchy 5589 * @param refocus when propagate is true, specifies whether to request the 5590 * root view place new focus 5591 */ 5592 void clearFocusInternal(View focused, boolean propagate, boolean refocus) { 5593 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 5594 mPrivateFlags &= ~PFLAG_FOCUSED; 5595 5596 if (propagate && mParent != null) { 5597 mParent.clearChildFocus(this); 5598 } 5599 5600 onFocusChanged(false, 0, null); 5601 refreshDrawableState(); 5602 5603 if (propagate && (!refocus || !rootViewRequestFocus())) { 5604 notifyGlobalFocusCleared(this); 5605 } 5606 } 5607 } 5608 5609 void notifyGlobalFocusCleared(View oldFocus) { 5610 if (oldFocus != null && mAttachInfo != null) { 5611 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, null); 5612 } 5613 } 5614 5615 boolean rootViewRequestFocus() { 5616 final View root = getRootView(); 5617 return root != null && root.requestFocus(); 5618 } 5619 5620 /** 5621 * Called internally by the view system when a new view is getting focus. 5622 * This is what clears the old focus. 5623 * <p> 5624 * <b>NOTE:</b> The parent view's focused child must be updated manually 5625 * after calling this method. Otherwise, the view hierarchy may be left in 5626 * an inconstent state. 5627 */ 5628 void unFocus(View focused) { 5629 if (DBG) { 5630 System.out.println(this + " unFocus()"); 5631 } 5632 5633 clearFocusInternal(focused, false, false); 5634 } 5635 5636 /** 5637 * Returns true if this view has focus itself, or is the ancestor of the 5638 * view that has focus. 5639 * 5640 * @return True if this view has or contains focus, false otherwise. 5641 */ 5642 @ViewDebug.ExportedProperty(category = "focus") 5643 public boolean hasFocus() { 5644 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 5645 } 5646 5647 /** 5648 * Returns true if this view is focusable or if it contains a reachable View 5649 * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" 5650 * is a View whose parents do not block descendants focus. 5651 * 5652 * Only {@link #VISIBLE} views are considered focusable. 5653 * 5654 * @return True if the view is focusable or if the view contains a focusable 5655 * View, false otherwise. 5656 * 5657 * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS 5658 * @see ViewGroup#getTouchscreenBlocksFocus() 5659 */ 5660 public boolean hasFocusable() { 5661 if (!isFocusableInTouchMode()) { 5662 for (ViewParent p = mParent; p instanceof ViewGroup; p = p.getParent()) { 5663 final ViewGroup g = (ViewGroup) p; 5664 if (g.shouldBlockFocusForTouchscreen()) { 5665 return false; 5666 } 5667 } 5668 } 5669 return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); 5670 } 5671 5672 /** 5673 * Called by the view system when the focus state of this view changes. 5674 * When the focus change event is caused by directional navigation, direction 5675 * and previouslyFocusedRect provide insight into where the focus is coming from. 5676 * When overriding, be sure to call up through to the super class so that 5677 * the standard focus handling will occur. 5678 * 5679 * @param gainFocus True if the View has focus; false otherwise. 5680 * @param direction The direction focus has moved when requestFocus() 5681 * is called to give this view focus. Values are 5682 * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, 5683 * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. 5684 * It may not always apply, in which case use the default. 5685 * @param previouslyFocusedRect The rectangle, in this view's coordinate 5686 * system, of the previously focused view. If applicable, this will be 5687 * passed in as finer grained information about where the focus is coming 5688 * from (in addition to direction). Will be <code>null</code> otherwise. 5689 */ 5690 @CallSuper 5691 protected void onFocusChanged(boolean gainFocus, @FocusDirection int direction, 5692 @Nullable Rect previouslyFocusedRect) { 5693 if (gainFocus) { 5694 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 5695 } else { 5696 notifyViewAccessibilityStateChangedIfNeeded( 5697 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 5698 } 5699 5700 InputMethodManager imm = InputMethodManager.peekInstance(); 5701 if (!gainFocus) { 5702 if (isPressed()) { 5703 setPressed(false); 5704 } 5705 if (imm != null && mAttachInfo != null 5706 && mAttachInfo.mHasWindowFocus) { 5707 imm.focusOut(this); 5708 } 5709 onFocusLost(); 5710 } else if (imm != null && mAttachInfo != null 5711 && mAttachInfo.mHasWindowFocus) { 5712 imm.focusIn(this); 5713 } 5714 5715 invalidate(true); 5716 ListenerInfo li = mListenerInfo; 5717 if (li != null && li.mOnFocusChangeListener != null) { 5718 li.mOnFocusChangeListener.onFocusChange(this, gainFocus); 5719 } 5720 5721 if (mAttachInfo != null) { 5722 mAttachInfo.mKeyDispatchState.reset(this); 5723 } 5724 } 5725 5726 /** 5727 * Sends an accessibility event of the given type. If accessibility is 5728 * not enabled this method has no effect. The default implementation calls 5729 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first 5730 * to populate information about the event source (this View), then calls 5731 * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to 5732 * populate the text content of the event source including its descendants, 5733 * and last calls 5734 * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} 5735 * on its parent to request sending of the event to interested parties. 5736 * <p> 5737 * If an {@link AccessibilityDelegate} has been specified via calling 5738 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5739 * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is 5740 * responsible for handling this call. 5741 * </p> 5742 * 5743 * @param eventType The type of the event to send, as defined by several types from 5744 * {@link android.view.accessibility.AccessibilityEvent}, such as 5745 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or 5746 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. 5747 * 5748 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5749 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5750 * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) 5751 * @see AccessibilityDelegate 5752 */ 5753 public void sendAccessibilityEvent(int eventType) { 5754 if (mAccessibilityDelegate != null) { 5755 mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); 5756 } else { 5757 sendAccessibilityEventInternal(eventType); 5758 } 5759 } 5760 5761 /** 5762 * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} 5763 * {@link AccessibilityEvent} to make an announcement which is related to some 5764 * sort of a context change for which none of the events representing UI transitions 5765 * is a good fit. For example, announcing a new page in a book. If accessibility 5766 * is not enabled this method does nothing. 5767 * 5768 * @param text The announcement text. 5769 */ 5770 public void announceForAccessibility(CharSequence text) { 5771 if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { 5772 AccessibilityEvent event = AccessibilityEvent.obtain( 5773 AccessibilityEvent.TYPE_ANNOUNCEMENT); 5774 onInitializeAccessibilityEvent(event); 5775 event.getText().add(text); 5776 event.setContentDescription(null); 5777 mParent.requestSendAccessibilityEvent(this, event); 5778 } 5779 } 5780 5781 /** 5782 * @see #sendAccessibilityEvent(int) 5783 * 5784 * Note: Called from the default {@link AccessibilityDelegate}. 5785 * 5786 * @hide 5787 */ 5788 public void sendAccessibilityEventInternal(int eventType) { 5789 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 5790 sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); 5791 } 5792 } 5793 5794 /** 5795 * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but 5796 * takes as an argument an empty {@link AccessibilityEvent} and does not 5797 * perform a check whether accessibility is enabled. 5798 * <p> 5799 * If an {@link AccessibilityDelegate} has been specified via calling 5800 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5801 * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} 5802 * is responsible for handling this call. 5803 * </p> 5804 * 5805 * @param event The event to send. 5806 * 5807 * @see #sendAccessibilityEvent(int) 5808 */ 5809 public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { 5810 if (mAccessibilityDelegate != null) { 5811 mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); 5812 } else { 5813 sendAccessibilityEventUncheckedInternal(event); 5814 } 5815 } 5816 5817 /** 5818 * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) 5819 * 5820 * Note: Called from the default {@link AccessibilityDelegate}. 5821 * 5822 * @hide 5823 */ 5824 public void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { 5825 if (!isShown()) { 5826 return; 5827 } 5828 onInitializeAccessibilityEvent(event); 5829 // Only a subset of accessibility events populates text content. 5830 if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { 5831 dispatchPopulateAccessibilityEvent(event); 5832 } 5833 // In the beginning we called #isShown(), so we know that getParent() is not null. 5834 getParent().requestSendAccessibilityEvent(this, event); 5835 } 5836 5837 /** 5838 * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then 5839 * to its children for adding their text content to the event. Note that the 5840 * event text is populated in a separate dispatch path since we add to the 5841 * event not only the text of the source but also the text of all its descendants. 5842 * A typical implementation will call 5843 * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view 5844 * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5845 * on each child. Override this method if custom population of the event text 5846 * content is required. 5847 * <p> 5848 * If an {@link AccessibilityDelegate} has been specified via calling 5849 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5850 * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} 5851 * is responsible for handling this call. 5852 * </p> 5853 * <p> 5854 * <em>Note:</em> Accessibility events of certain types are not dispatched for 5855 * populating the event text via this method. For details refer to {@link AccessibilityEvent}. 5856 * </p> 5857 * 5858 * @param event The event. 5859 * 5860 * @return True if the event population was completed. 5861 */ 5862 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 5863 if (mAccessibilityDelegate != null) { 5864 return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); 5865 } else { 5866 return dispatchPopulateAccessibilityEventInternal(event); 5867 } 5868 } 5869 5870 /** 5871 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5872 * 5873 * Note: Called from the default {@link AccessibilityDelegate}. 5874 * 5875 * @hide 5876 */ 5877 public boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5878 onPopulateAccessibilityEvent(event); 5879 return false; 5880 } 5881 5882 /** 5883 * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5884 * giving a chance to this View to populate the accessibility event with its 5885 * text content. While this method is free to modify event 5886 * attributes other than text content, doing so should normally be performed in 5887 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. 5888 * <p> 5889 * Example: Adding formatted date string to an accessibility event in addition 5890 * to the text added by the super implementation: 5891 * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5892 * super.onPopulateAccessibilityEvent(event); 5893 * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; 5894 * String selectedDateUtterance = DateUtils.formatDateTime(mContext, 5895 * mCurrentDate.getTimeInMillis(), flags); 5896 * event.getText().add(selectedDateUtterance); 5897 * }</pre> 5898 * <p> 5899 * If an {@link AccessibilityDelegate} has been specified via calling 5900 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5901 * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} 5902 * is responsible for handling this call. 5903 * </p> 5904 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5905 * information to the event, in case the default implementation has basic information to add. 5906 * </p> 5907 * 5908 * @param event The accessibility event which to populate. 5909 * 5910 * @see #sendAccessibilityEvent(int) 5911 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5912 */ 5913 @CallSuper 5914 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5915 if (mAccessibilityDelegate != null) { 5916 mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); 5917 } else { 5918 onPopulateAccessibilityEventInternal(event); 5919 } 5920 } 5921 5922 /** 5923 * @see #onPopulateAccessibilityEvent(AccessibilityEvent) 5924 * 5925 * Note: Called from the default {@link AccessibilityDelegate}. 5926 * 5927 * @hide 5928 */ 5929 public void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5930 } 5931 5932 /** 5933 * Initializes an {@link AccessibilityEvent} with information about 5934 * this View which is the event source. In other words, the source of 5935 * an accessibility event is the view whose state change triggered firing 5936 * the event. 5937 * <p> 5938 * Example: Setting the password property of an event in addition 5939 * to properties set by the super implementation: 5940 * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5941 * super.onInitializeAccessibilityEvent(event); 5942 * event.setPassword(true); 5943 * }</pre> 5944 * <p> 5945 * If an {@link AccessibilityDelegate} has been specified via calling 5946 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5947 * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} 5948 * is responsible for handling this call. 5949 * </p> 5950 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5951 * information to the event, in case the default implementation has basic information to add. 5952 * </p> 5953 * @param event The event to initialize. 5954 * 5955 * @see #sendAccessibilityEvent(int) 5956 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5957 */ 5958 @CallSuper 5959 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5960 if (mAccessibilityDelegate != null) { 5961 mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); 5962 } else { 5963 onInitializeAccessibilityEventInternal(event); 5964 } 5965 } 5966 5967 /** 5968 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5969 * 5970 * Note: Called from the default {@link AccessibilityDelegate}. 5971 * 5972 * @hide 5973 */ 5974 public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 5975 event.setSource(this); 5976 event.setClassName(getAccessibilityClassName()); 5977 event.setPackageName(getContext().getPackageName()); 5978 event.setEnabled(isEnabled()); 5979 event.setContentDescription(mContentDescription); 5980 5981 switch (event.getEventType()) { 5982 case AccessibilityEvent.TYPE_VIEW_FOCUSED: { 5983 ArrayList<View> focusablesTempList = (mAttachInfo != null) 5984 ? mAttachInfo.mTempArrayList : new ArrayList<View>(); 5985 getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL); 5986 event.setItemCount(focusablesTempList.size()); 5987 event.setCurrentItemIndex(focusablesTempList.indexOf(this)); 5988 if (mAttachInfo != null) { 5989 focusablesTempList.clear(); 5990 } 5991 } break; 5992 case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED: { 5993 CharSequence text = getIterableTextForAccessibility(); 5994 if (text != null && text.length() > 0) { 5995 event.setFromIndex(getAccessibilitySelectionStart()); 5996 event.setToIndex(getAccessibilitySelectionEnd()); 5997 event.setItemCount(text.length()); 5998 } 5999 } break; 6000 } 6001 } 6002 6003 /** 6004 * Returns an {@link AccessibilityNodeInfo} representing this view from the 6005 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 6006 * This method is responsible for obtaining an accessibility node info from a 6007 * pool of reusable instances and calling 6008 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to 6009 * initialize the former. 6010 * <p> 6011 * Note: The client is responsible for recycling the obtained instance by calling 6012 * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. 6013 * </p> 6014 * 6015 * @return A populated {@link AccessibilityNodeInfo}. 6016 * 6017 * @see AccessibilityNodeInfo 6018 */ 6019 public AccessibilityNodeInfo createAccessibilityNodeInfo() { 6020 if (mAccessibilityDelegate != null) { 6021 return mAccessibilityDelegate.createAccessibilityNodeInfo(this); 6022 } else { 6023 return createAccessibilityNodeInfoInternal(); 6024 } 6025 } 6026 6027 /** 6028 * @see #createAccessibilityNodeInfo() 6029 * 6030 * @hide 6031 */ 6032 public AccessibilityNodeInfo createAccessibilityNodeInfoInternal() { 6033 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 6034 if (provider != null) { 6035 return provider.createAccessibilityNodeInfo(AccessibilityNodeProvider.HOST_VIEW_ID); 6036 } else { 6037 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); 6038 onInitializeAccessibilityNodeInfo(info); 6039 return info; 6040 } 6041 } 6042 6043 /** 6044 * Initializes an {@link AccessibilityNodeInfo} with information about this view. 6045 * The base implementation sets: 6046 * <ul> 6047 * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> 6048 * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> 6049 * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> 6050 * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> 6051 * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> 6052 * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> 6053 * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> 6054 * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> 6055 * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> 6056 * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> 6057 * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> 6058 * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> 6059 * <li>{@link AccessibilityNodeInfo#setContextClickable(boolean)}</li> 6060 * </ul> 6061 * <p> 6062 * Subclasses should override this method, call the super implementation, 6063 * and set additional attributes. 6064 * </p> 6065 * <p> 6066 * If an {@link AccessibilityDelegate} has been specified via calling 6067 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6068 * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} 6069 * is responsible for handling this call. 6070 * </p> 6071 * 6072 * @param info The instance to initialize. 6073 */ 6074 @CallSuper 6075 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 6076 if (mAccessibilityDelegate != null) { 6077 mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); 6078 } else { 6079 onInitializeAccessibilityNodeInfoInternal(info); 6080 } 6081 } 6082 6083 /** 6084 * Gets the location of this view in screen coordinates. 6085 * 6086 * @param outRect The output location 6087 * @hide 6088 */ 6089 public void getBoundsOnScreen(Rect outRect) { 6090 getBoundsOnScreen(outRect, false); 6091 } 6092 6093 /** 6094 * Gets the location of this view in screen coordinates. 6095 * 6096 * @param outRect The output location 6097 * @param clipToParent Whether to clip child bounds to the parent ones. 6098 * @hide 6099 */ 6100 public void getBoundsOnScreen(Rect outRect, boolean clipToParent) { 6101 if (mAttachInfo == null) { 6102 return; 6103 } 6104 6105 RectF position = mAttachInfo.mTmpTransformRect; 6106 position.set(0, 0, mRight - mLeft, mBottom - mTop); 6107 6108 if (!hasIdentityMatrix()) { 6109 getMatrix().mapRect(position); 6110 } 6111 6112 position.offset(mLeft, mTop); 6113 6114 ViewParent parent = mParent; 6115 while (parent instanceof View) { 6116 View parentView = (View) parent; 6117 6118 position.offset(-parentView.mScrollX, -parentView.mScrollY); 6119 6120 if (clipToParent) { 6121 position.left = Math.max(position.left, 0); 6122 position.top = Math.max(position.top, 0); 6123 position.right = Math.min(position.right, parentView.getWidth()); 6124 position.bottom = Math.min(position.bottom, parentView.getHeight()); 6125 } 6126 6127 if (!parentView.hasIdentityMatrix()) { 6128 parentView.getMatrix().mapRect(position); 6129 } 6130 6131 position.offset(parentView.mLeft, parentView.mTop); 6132 6133 parent = parentView.mParent; 6134 } 6135 6136 if (parent instanceof ViewRootImpl) { 6137 ViewRootImpl viewRootImpl = (ViewRootImpl) parent; 6138 position.offset(0, -viewRootImpl.mCurScrollY); 6139 } 6140 6141 position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 6142 6143 outRect.set((int) (position.left + 0.5f), (int) (position.top + 0.5f), 6144 (int) (position.right + 0.5f), (int) (position.bottom + 0.5f)); 6145 } 6146 6147 /** 6148 * Return the class name of this object to be used for accessibility purposes. 6149 * Subclasses should only override this if they are implementing something that 6150 * should be seen as a completely new class of view when used by accessibility, 6151 * unrelated to the class it is deriving from. This is used to fill in 6152 * {@link AccessibilityNodeInfo#setClassName AccessibilityNodeInfo.setClassName}. 6153 */ 6154 public CharSequence getAccessibilityClassName() { 6155 return View.class.getName(); 6156 } 6157 6158 /** 6159 * Called when assist structure is being retrieved from a view as part of 6160 * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData}. 6161 * @param structure Fill in with structured view data. The default implementation 6162 * fills in all data that can be inferred from the view itself. 6163 */ 6164 public void onProvideStructure(ViewStructure structure) { 6165 final int id = mID; 6166 if (id > 0 && (id&0xff000000) != 0 && (id&0x00ff0000) != 0 6167 && (id&0x0000ffff) != 0) { 6168 String pkg, type, entry; 6169 try { 6170 final Resources res = getResources(); 6171 entry = res.getResourceEntryName(id); 6172 type = res.getResourceTypeName(id); 6173 pkg = res.getResourcePackageName(id); 6174 } catch (Resources.NotFoundException e) { 6175 entry = type = pkg = null; 6176 } 6177 structure.setId(id, pkg, type, entry); 6178 } else { 6179 structure.setId(id, null, null, null); 6180 } 6181 structure.setDimens(mLeft, mTop, mScrollX, mScrollY, mRight - mLeft, mBottom - mTop); 6182 structure.setVisibility(getVisibility()); 6183 structure.setEnabled(isEnabled()); 6184 if (isClickable()) { 6185 structure.setClickable(true); 6186 } 6187 if (isFocusable()) { 6188 structure.setFocusable(true); 6189 } 6190 if (isFocused()) { 6191 structure.setFocused(true); 6192 } 6193 if (isAccessibilityFocused()) { 6194 structure.setAccessibilityFocused(true); 6195 } 6196 if (isSelected()) { 6197 structure.setSelected(true); 6198 } 6199 if (isActivated()) { 6200 structure.setActivated(true); 6201 } 6202 if (isLongClickable()) { 6203 structure.setLongClickable(true); 6204 } 6205 if (this instanceof Checkable) { 6206 structure.setCheckable(true); 6207 if (((Checkable)this).isChecked()) { 6208 structure.setChecked(true); 6209 } 6210 } 6211 if (isContextClickable()) { 6212 structure.setContextClickable(true); 6213 } 6214 structure.setClassName(getAccessibilityClassName().toString()); 6215 structure.setContentDescription(getContentDescription()); 6216 } 6217 6218 /** @hide */ 6219 public void onProvideAssistStructure(ViewStructure structure) { 6220 onProvideStructure(structure); 6221 } 6222 6223 /** 6224 * Called when assist structure is being retrieved from a view as part of 6225 * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData} to 6226 * generate additional virtual structure under this view. The defaullt implementation 6227 * uses {@link #getAccessibilityNodeProvider()} to try to generate this from the 6228 * view's virtual accessibility nodes, if any. You can override this for a more 6229 * optimal implementation providing this data. 6230 */ 6231 public void onProvideVirtualStructure(ViewStructure structure) { 6232 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 6233 if (provider != null) { 6234 AccessibilityNodeInfo info = createAccessibilityNodeInfo(); 6235 Log.i("View", "Provider of " + this + ": children=" + info.getChildCount()); 6236 structure.setChildCount(1); 6237 ViewStructure root = structure.newChild(0); 6238 populateVirtualStructure(root, provider, info); 6239 info.recycle(); 6240 } 6241 } 6242 6243 /** @hide */ 6244 public void onProvideVirtualAssistStructure(ViewStructure structure) { 6245 onProvideVirtualStructure(structure); 6246 } 6247 6248 private void populateVirtualStructure(ViewStructure structure, 6249 AccessibilityNodeProvider provider, AccessibilityNodeInfo info) { 6250 structure.setId(AccessibilityNodeInfo.getVirtualDescendantId(info.getSourceNodeId()), 6251 null, null, null); 6252 Rect rect = structure.getTempRect(); 6253 info.getBoundsInParent(rect); 6254 structure.setDimens(rect.left, rect.top, 0, 0, rect.width(), rect.height()); 6255 structure.setVisibility(VISIBLE); 6256 structure.setEnabled(info.isEnabled()); 6257 if (info.isClickable()) { 6258 structure.setClickable(true); 6259 } 6260 if (info.isFocusable()) { 6261 structure.setFocusable(true); 6262 } 6263 if (info.isFocused()) { 6264 structure.setFocused(true); 6265 } 6266 if (info.isAccessibilityFocused()) { 6267 structure.setAccessibilityFocused(true); 6268 } 6269 if (info.isSelected()) { 6270 structure.setSelected(true); 6271 } 6272 if (info.isLongClickable()) { 6273 structure.setLongClickable(true); 6274 } 6275 if (info.isCheckable()) { 6276 structure.setCheckable(true); 6277 if (info.isChecked()) { 6278 structure.setChecked(true); 6279 } 6280 } 6281 if (info.isContextClickable()) { 6282 structure.setContextClickable(true); 6283 } 6284 CharSequence cname = info.getClassName(); 6285 structure.setClassName(cname != null ? cname.toString() : null); 6286 structure.setContentDescription(info.getContentDescription()); 6287 Log.i("View", "vassist " + cname + " @ " + rect.toShortString() 6288 + " text=" + info.getText() + " cd=" + info.getContentDescription()); 6289 if (info.getText() != null || info.getError() != null) { 6290 structure.setText(info.getText(), info.getTextSelectionStart(), 6291 info.getTextSelectionEnd()); 6292 } 6293 final int NCHILDREN = info.getChildCount(); 6294 if (NCHILDREN > 0) { 6295 structure.setChildCount(NCHILDREN); 6296 for (int i=0; i<NCHILDREN; i++) { 6297 AccessibilityNodeInfo cinfo = provider.createAccessibilityNodeInfo( 6298 AccessibilityNodeInfo.getVirtualDescendantId(info.getChildId(i))); 6299 ViewStructure child = structure.newChild(i); 6300 populateVirtualStructure(child, provider, cinfo); 6301 cinfo.recycle(); 6302 } 6303 } 6304 } 6305 6306 /** 6307 * Dispatch creation of {@link ViewStructure} down the hierarchy. The default 6308 * implementation calls {@link #onProvideStructure} and 6309 * {@link #onProvideVirtualStructure}. 6310 */ 6311 public void dispatchProvideStructure(ViewStructure structure) { 6312 if (!isAssistBlocked()) { 6313 onProvideAssistStructure(structure); 6314 onProvideVirtualAssistStructure(structure); 6315 } else { 6316 structure.setClassName(getAccessibilityClassName().toString()); 6317 structure.setAssistBlocked(true); 6318 } 6319 } 6320 6321 /** 6322 * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 6323 * 6324 * Note: Called from the default {@link AccessibilityDelegate}. 6325 * 6326 * @hide 6327 */ 6328 public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 6329 if (mAttachInfo == null) { 6330 return; 6331 } 6332 6333 Rect bounds = mAttachInfo.mTmpInvalRect; 6334 6335 getDrawingRect(bounds); 6336 info.setBoundsInParent(bounds); 6337 6338 getBoundsOnScreen(bounds, true); 6339 info.setBoundsInScreen(bounds); 6340 6341 ViewParent parent = getParentForAccessibility(); 6342 if (parent instanceof View) { 6343 info.setParent((View) parent); 6344 } 6345 6346 if (mID != View.NO_ID) { 6347 View rootView = getRootView(); 6348 if (rootView == null) { 6349 rootView = this; 6350 } 6351 6352 View label = rootView.findLabelForView(this, mID); 6353 if (label != null) { 6354 info.setLabeledBy(label); 6355 } 6356 6357 if ((mAttachInfo.mAccessibilityFetchFlags 6358 & AccessibilityNodeInfo.FLAG_REPORT_VIEW_IDS) != 0 6359 && Resources.resourceHasPackage(mID)) { 6360 try { 6361 String viewId = getResources().getResourceName(mID); 6362 info.setViewIdResourceName(viewId); 6363 } catch (Resources.NotFoundException nfe) { 6364 /* ignore */ 6365 } 6366 } 6367 } 6368 6369 if (mLabelForId != View.NO_ID) { 6370 View rootView = getRootView(); 6371 if (rootView == null) { 6372 rootView = this; 6373 } 6374 View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); 6375 if (labeled != null) { 6376 info.setLabelFor(labeled); 6377 } 6378 } 6379 6380 if (mAccessibilityTraversalBeforeId != View.NO_ID) { 6381 View rootView = getRootView(); 6382 if (rootView == null) { 6383 rootView = this; 6384 } 6385 View next = rootView.findViewInsideOutShouldExist(this, 6386 mAccessibilityTraversalBeforeId); 6387 if (next != null && next.includeForAccessibility()) { 6388 info.setTraversalBefore(next); 6389 } 6390 } 6391 6392 if (mAccessibilityTraversalAfterId != View.NO_ID) { 6393 View rootView = getRootView(); 6394 if (rootView == null) { 6395 rootView = this; 6396 } 6397 View next = rootView.findViewInsideOutShouldExist(this, 6398 mAccessibilityTraversalAfterId); 6399 if (next != null && next.includeForAccessibility()) { 6400 info.setTraversalAfter(next); 6401 } 6402 } 6403 6404 info.setVisibleToUser(isVisibleToUser()); 6405 6406 info.setPackageName(mContext.getPackageName()); 6407 info.setClassName(getAccessibilityClassName()); 6408 info.setContentDescription(getContentDescription()); 6409 6410 info.setEnabled(isEnabled()); 6411 info.setClickable(isClickable()); 6412 info.setFocusable(isFocusable()); 6413 info.setFocused(isFocused()); 6414 info.setAccessibilityFocused(isAccessibilityFocused()); 6415 info.setSelected(isSelected()); 6416 info.setLongClickable(isLongClickable()); 6417 info.setContextClickable(isContextClickable()); 6418 info.setLiveRegion(getAccessibilityLiveRegion()); 6419 6420 // TODO: These make sense only if we are in an AdapterView but all 6421 // views can be selected. Maybe from accessibility perspective 6422 // we should report as selectable view in an AdapterView. 6423 info.addAction(AccessibilityNodeInfo.ACTION_SELECT); 6424 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); 6425 6426 if (isFocusable()) { 6427 if (isFocused()) { 6428 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); 6429 } else { 6430 info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); 6431 } 6432 } 6433 6434 if (!isAccessibilityFocused()) { 6435 info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); 6436 } else { 6437 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 6438 } 6439 6440 if (isClickable() && isEnabled()) { 6441 info.addAction(AccessibilityNodeInfo.ACTION_CLICK); 6442 } 6443 6444 if (isLongClickable() && isEnabled()) { 6445 info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); 6446 } 6447 6448 if (isContextClickable() && isEnabled()) { 6449 info.addAction(AccessibilityAction.ACTION_CONTEXT_CLICK); 6450 } 6451 6452 CharSequence text = getIterableTextForAccessibility(); 6453 if (text != null && text.length() > 0) { 6454 info.setTextSelection(getAccessibilitySelectionStart(), getAccessibilitySelectionEnd()); 6455 6456 info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION); 6457 info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY); 6458 info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY); 6459 info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER 6460 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD 6461 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH); 6462 } 6463 6464 info.addAction(AccessibilityAction.ACTION_SHOW_ON_SCREEN); 6465 } 6466 6467 private View findLabelForView(View view, int labeledId) { 6468 if (mMatchLabelForPredicate == null) { 6469 mMatchLabelForPredicate = new MatchLabelForPredicate(); 6470 } 6471 mMatchLabelForPredicate.mLabeledId = labeledId; 6472 return findViewByPredicateInsideOut(view, mMatchLabelForPredicate); 6473 } 6474 6475 /** 6476 * Computes whether this view is visible to the user. Such a view is 6477 * attached, visible, all its predecessors are visible, it is not clipped 6478 * entirely by its predecessors, and has an alpha greater than zero. 6479 * 6480 * @return Whether the view is visible on the screen. 6481 * 6482 * @hide 6483 */ 6484 protected boolean isVisibleToUser() { 6485 return isVisibleToUser(null); 6486 } 6487 6488 /** 6489 * Computes whether the given portion of this view is visible to the user. 6490 * Such a view is attached, visible, all its predecessors are visible, 6491 * has an alpha greater than zero, and the specified portion is not 6492 * clipped entirely by its predecessors. 6493 * 6494 * @param boundInView the portion of the view to test; coordinates should be relative; may be 6495 * <code>null</code>, and the entire view will be tested in this case. 6496 * When <code>true</code> is returned by the function, the actual visible 6497 * region will be stored in this parameter; that is, if boundInView is fully 6498 * contained within the view, no modification will be made, otherwise regions 6499 * outside of the visible area of the view will be clipped. 6500 * 6501 * @return Whether the specified portion of the view is visible on the screen. 6502 * 6503 * @hide 6504 */ 6505 protected boolean isVisibleToUser(Rect boundInView) { 6506 if (mAttachInfo != null) { 6507 // Attached to invisible window means this view is not visible. 6508 if (mAttachInfo.mWindowVisibility != View.VISIBLE) { 6509 return false; 6510 } 6511 // An invisible predecessor or one with alpha zero means 6512 // that this view is not visible to the user. 6513 Object current = this; 6514 while (current instanceof View) { 6515 View view = (View) current; 6516 // We have attach info so this view is attached and there is no 6517 // need to check whether we reach to ViewRootImpl on the way up. 6518 if (view.getAlpha() <= 0 || view.getTransitionAlpha() <= 0 || 6519 view.getVisibility() != VISIBLE) { 6520 return false; 6521 } 6522 current = view.mParent; 6523 } 6524 // Check if the view is entirely covered by its predecessors. 6525 Rect visibleRect = mAttachInfo.mTmpInvalRect; 6526 Point offset = mAttachInfo.mPoint; 6527 if (!getGlobalVisibleRect(visibleRect, offset)) { 6528 return false; 6529 } 6530 // Check if the visible portion intersects the rectangle of interest. 6531 if (boundInView != null) { 6532 visibleRect.offset(-offset.x, -offset.y); 6533 return boundInView.intersect(visibleRect); 6534 } 6535 return true; 6536 } 6537 return false; 6538 } 6539 6540 /** 6541 * Returns the delegate for implementing accessibility support via 6542 * composition. For more details see {@link AccessibilityDelegate}. 6543 * 6544 * @return The delegate, or null if none set. 6545 * 6546 * @hide 6547 */ 6548 public AccessibilityDelegate getAccessibilityDelegate() { 6549 return mAccessibilityDelegate; 6550 } 6551 6552 /** 6553 * Sets a delegate for implementing accessibility support via composition as 6554 * opposed to inheritance. The delegate's primary use is for implementing 6555 * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. 6556 * 6557 * @param delegate The delegate instance. 6558 * 6559 * @see AccessibilityDelegate 6560 */ 6561 public void setAccessibilityDelegate(@Nullable AccessibilityDelegate delegate) { 6562 mAccessibilityDelegate = delegate; 6563 } 6564 6565 /** 6566 * Gets the provider for managing a virtual view hierarchy rooted at this View 6567 * and reported to {@link android.accessibilityservice.AccessibilityService}s 6568 * that explore the window content. 6569 * <p> 6570 * If this method returns an instance, this instance is responsible for managing 6571 * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this 6572 * View including the one representing the View itself. Similarly the returned 6573 * instance is responsible for performing accessibility actions on any virtual 6574 * view or the root view itself. 6575 * </p> 6576 * <p> 6577 * If an {@link AccessibilityDelegate} has been specified via calling 6578 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6579 * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} 6580 * is responsible for handling this call. 6581 * </p> 6582 * 6583 * @return The provider. 6584 * 6585 * @see AccessibilityNodeProvider 6586 */ 6587 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 6588 if (mAccessibilityDelegate != null) { 6589 return mAccessibilityDelegate.getAccessibilityNodeProvider(this); 6590 } else { 6591 return null; 6592 } 6593 } 6594 6595 /** 6596 * Gets the unique identifier of this view on the screen for accessibility purposes. 6597 * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. 6598 * 6599 * @return The view accessibility id. 6600 * 6601 * @hide 6602 */ 6603 public int getAccessibilityViewId() { 6604 if (mAccessibilityViewId == NO_ID) { 6605 mAccessibilityViewId = sNextAccessibilityViewId++; 6606 } 6607 return mAccessibilityViewId; 6608 } 6609 6610 /** 6611 * Gets the unique identifier of the window in which this View reseides. 6612 * 6613 * @return The window accessibility id. 6614 * 6615 * @hide 6616 */ 6617 public int getAccessibilityWindowId() { 6618 return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId 6619 : AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 6620 } 6621 6622 /** 6623 * Gets the {@link View} description. It briefly describes the view and is 6624 * primarily used for accessibility support. Set this property to enable 6625 * better accessibility support for your application. This is especially 6626 * true for views that do not have textual representation (For example, 6627 * ImageButton). 6628 * 6629 * @return The content description. 6630 * 6631 * @attr ref android.R.styleable#View_contentDescription 6632 */ 6633 @ViewDebug.ExportedProperty(category = "accessibility") 6634 public CharSequence getContentDescription() { 6635 return mContentDescription; 6636 } 6637 6638 /** 6639 * Sets the {@link View} description. It briefly describes the view and is 6640 * primarily used for accessibility support. Set this property to enable 6641 * better accessibility support for your application. This is especially 6642 * true for views that do not have textual representation (For example, 6643 * ImageButton). 6644 * 6645 * @param contentDescription The content description. 6646 * 6647 * @attr ref android.R.styleable#View_contentDescription 6648 */ 6649 @RemotableViewMethod 6650 public void setContentDescription(CharSequence contentDescription) { 6651 if (mContentDescription == null) { 6652 if (contentDescription == null) { 6653 return; 6654 } 6655 } else if (mContentDescription.equals(contentDescription)) { 6656 return; 6657 } 6658 mContentDescription = contentDescription; 6659 final boolean nonEmptyDesc = contentDescription != null && contentDescription.length() > 0; 6660 if (nonEmptyDesc && getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 6661 setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); 6662 notifySubtreeAccessibilityStateChangedIfNeeded(); 6663 } else { 6664 notifyViewAccessibilityStateChangedIfNeeded( 6665 AccessibilityEvent.CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION); 6666 } 6667 } 6668 6669 /** 6670 * Sets the id of a view before which this one is visited in accessibility traversal. 6671 * A screen-reader must visit the content of this view before the content of the one 6672 * it precedes. For example, if view B is set to be before view A, then a screen-reader 6673 * will traverse the entire content of B before traversing the entire content of A, 6674 * regardles of what traversal strategy it is using. 6675 * <p> 6676 * Views that do not have specified before/after relationships are traversed in order 6677 * determined by the screen-reader. 6678 * </p> 6679 * <p> 6680 * Setting that this view is before a view that is not important for accessibility 6681 * or if this view is not important for accessibility will have no effect as the 6682 * screen-reader is not aware of unimportant views. 6683 * </p> 6684 * 6685 * @param beforeId The id of a view this one precedes in accessibility traversal. 6686 * 6687 * @attr ref android.R.styleable#View_accessibilityTraversalBefore 6688 * 6689 * @see #setImportantForAccessibility(int) 6690 */ 6691 @RemotableViewMethod 6692 public void setAccessibilityTraversalBefore(int beforeId) { 6693 if (mAccessibilityTraversalBeforeId == beforeId) { 6694 return; 6695 } 6696 mAccessibilityTraversalBeforeId = beforeId; 6697 notifyViewAccessibilityStateChangedIfNeeded( 6698 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6699 } 6700 6701 /** 6702 * Gets the id of a view before which this one is visited in accessibility traversal. 6703 * 6704 * @return The id of a view this one precedes in accessibility traversal if 6705 * specified, otherwise {@link #NO_ID}. 6706 * 6707 * @see #setAccessibilityTraversalBefore(int) 6708 */ 6709 public int getAccessibilityTraversalBefore() { 6710 return mAccessibilityTraversalBeforeId; 6711 } 6712 6713 /** 6714 * Sets the id of a view after which this one is visited in accessibility traversal. 6715 * A screen-reader must visit the content of the other view before the content of this 6716 * one. For example, if view B is set to be after view A, then a screen-reader 6717 * will traverse the entire content of A before traversing the entire content of B, 6718 * regardles of what traversal strategy it is using. 6719 * <p> 6720 * Views that do not have specified before/after relationships are traversed in order 6721 * determined by the screen-reader. 6722 * </p> 6723 * <p> 6724 * Setting that this view is after a view that is not important for accessibility 6725 * or if this view is not important for accessibility will have no effect as the 6726 * screen-reader is not aware of unimportant views. 6727 * </p> 6728 * 6729 * @param afterId The id of a view this one succedees in accessibility traversal. 6730 * 6731 * @attr ref android.R.styleable#View_accessibilityTraversalAfter 6732 * 6733 * @see #setImportantForAccessibility(int) 6734 */ 6735 @RemotableViewMethod 6736 public void setAccessibilityTraversalAfter(int afterId) { 6737 if (mAccessibilityTraversalAfterId == afterId) { 6738 return; 6739 } 6740 mAccessibilityTraversalAfterId = afterId; 6741 notifyViewAccessibilityStateChangedIfNeeded( 6742 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6743 } 6744 6745 /** 6746 * Gets the id of a view after which this one is visited in accessibility traversal. 6747 * 6748 * @return The id of a view this one succeedes in accessibility traversal if 6749 * specified, otherwise {@link #NO_ID}. 6750 * 6751 * @see #setAccessibilityTraversalAfter(int) 6752 */ 6753 public int getAccessibilityTraversalAfter() { 6754 return mAccessibilityTraversalAfterId; 6755 } 6756 6757 /** 6758 * Gets the id of a view for which this view serves as a label for 6759 * accessibility purposes. 6760 * 6761 * @return The labeled view id. 6762 */ 6763 @ViewDebug.ExportedProperty(category = "accessibility") 6764 public int getLabelFor() { 6765 return mLabelForId; 6766 } 6767 6768 /** 6769 * Sets the id of a view for which this view serves as a label for 6770 * accessibility purposes. 6771 * 6772 * @param id The labeled view id. 6773 */ 6774 @RemotableViewMethod 6775 public void setLabelFor(@IdRes int id) { 6776 if (mLabelForId == id) { 6777 return; 6778 } 6779 mLabelForId = id; 6780 if (mLabelForId != View.NO_ID 6781 && mID == View.NO_ID) { 6782 mID = generateViewId(); 6783 } 6784 notifyViewAccessibilityStateChangedIfNeeded( 6785 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6786 } 6787 6788 /** 6789 * Invoked whenever this view loses focus, either by losing window focus or by losing 6790 * focus within its window. This method can be used to clear any state tied to the 6791 * focus. For instance, if a button is held pressed with the trackball and the window 6792 * loses focus, this method can be used to cancel the press. 6793 * 6794 * Subclasses of View overriding this method should always call super.onFocusLost(). 6795 * 6796 * @see #onFocusChanged(boolean, int, android.graphics.Rect) 6797 * @see #onWindowFocusChanged(boolean) 6798 * 6799 * @hide pending API council approval 6800 */ 6801 @CallSuper 6802 protected void onFocusLost() { 6803 resetPressedState(); 6804 } 6805 6806 private void resetPressedState() { 6807 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 6808 return; 6809 } 6810 6811 if (isPressed()) { 6812 setPressed(false); 6813 6814 if (!mHasPerformedLongPress) { 6815 removeLongPressCallback(); 6816 } 6817 } 6818 } 6819 6820 /** 6821 * Returns true if this view has focus 6822 * 6823 * @return True if this view has focus, false otherwise. 6824 */ 6825 @ViewDebug.ExportedProperty(category = "focus") 6826 public boolean isFocused() { 6827 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 6828 } 6829 6830 /** 6831 * Find the view in the hierarchy rooted at this view that currently has 6832 * focus. 6833 * 6834 * @return The view that currently has focus, or null if no focused view can 6835 * be found. 6836 */ 6837 public View findFocus() { 6838 return (mPrivateFlags & PFLAG_FOCUSED) != 0 ? this : null; 6839 } 6840 6841 /** 6842 * Indicates whether this view is one of the set of scrollable containers in 6843 * its window. 6844 * 6845 * @return whether this view is one of the set of scrollable containers in 6846 * its window 6847 * 6848 * @attr ref android.R.styleable#View_isScrollContainer 6849 */ 6850 public boolean isScrollContainer() { 6851 return (mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0; 6852 } 6853 6854 /** 6855 * Change whether this view is one of the set of scrollable containers in 6856 * its window. This will be used to determine whether the window can 6857 * resize or must pan when a soft input area is open -- scrollable 6858 * containers allow the window to use resize mode since the container 6859 * will appropriately shrink. 6860 * 6861 * @attr ref android.R.styleable#View_isScrollContainer 6862 */ 6863 public void setScrollContainer(boolean isScrollContainer) { 6864 if (isScrollContainer) { 6865 if (mAttachInfo != null && (mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) == 0) { 6866 mAttachInfo.mScrollContainers.add(this); 6867 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 6868 } 6869 mPrivateFlags |= PFLAG_SCROLL_CONTAINER; 6870 } else { 6871 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 6872 mAttachInfo.mScrollContainers.remove(this); 6873 } 6874 mPrivateFlags &= ~(PFLAG_SCROLL_CONTAINER|PFLAG_SCROLL_CONTAINER_ADDED); 6875 } 6876 } 6877 6878 /** 6879 * Returns the quality of the drawing cache. 6880 * 6881 * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 6882 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 6883 * 6884 * @see #setDrawingCacheQuality(int) 6885 * @see #setDrawingCacheEnabled(boolean) 6886 * @see #isDrawingCacheEnabled() 6887 * 6888 * @attr ref android.R.styleable#View_drawingCacheQuality 6889 */ 6890 @DrawingCacheQuality 6891 public int getDrawingCacheQuality() { 6892 return mViewFlags & DRAWING_CACHE_QUALITY_MASK; 6893 } 6894 6895 /** 6896 * Set the drawing cache quality of this view. This value is used only when the 6897 * drawing cache is enabled 6898 * 6899 * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 6900 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 6901 * 6902 * @see #getDrawingCacheQuality() 6903 * @see #setDrawingCacheEnabled(boolean) 6904 * @see #isDrawingCacheEnabled() 6905 * 6906 * @attr ref android.R.styleable#View_drawingCacheQuality 6907 */ 6908 public void setDrawingCacheQuality(@DrawingCacheQuality int quality) { 6909 setFlags(quality, DRAWING_CACHE_QUALITY_MASK); 6910 } 6911 6912 /** 6913 * Returns whether the screen should remain on, corresponding to the current 6914 * value of {@link #KEEP_SCREEN_ON}. 6915 * 6916 * @return Returns true if {@link #KEEP_SCREEN_ON} is set. 6917 * 6918 * @see #setKeepScreenOn(boolean) 6919 * 6920 * @attr ref android.R.styleable#View_keepScreenOn 6921 */ 6922 public boolean getKeepScreenOn() { 6923 return (mViewFlags & KEEP_SCREEN_ON) != 0; 6924 } 6925 6926 /** 6927 * Controls whether the screen should remain on, modifying the 6928 * value of {@link #KEEP_SCREEN_ON}. 6929 * 6930 * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. 6931 * 6932 * @see #getKeepScreenOn() 6933 * 6934 * @attr ref android.R.styleable#View_keepScreenOn 6935 */ 6936 public void setKeepScreenOn(boolean keepScreenOn) { 6937 setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); 6938 } 6939 6940 /** 6941 * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 6942 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6943 * 6944 * @attr ref android.R.styleable#View_nextFocusLeft 6945 */ 6946 public int getNextFocusLeftId() { 6947 return mNextFocusLeftId; 6948 } 6949 6950 /** 6951 * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 6952 * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should 6953 * decide automatically. 6954 * 6955 * @attr ref android.R.styleable#View_nextFocusLeft 6956 */ 6957 public void setNextFocusLeftId(int nextFocusLeftId) { 6958 mNextFocusLeftId = nextFocusLeftId; 6959 } 6960 6961 /** 6962 * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 6963 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6964 * 6965 * @attr ref android.R.styleable#View_nextFocusRight 6966 */ 6967 public int getNextFocusRightId() { 6968 return mNextFocusRightId; 6969 } 6970 6971 /** 6972 * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 6973 * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should 6974 * decide automatically. 6975 * 6976 * @attr ref android.R.styleable#View_nextFocusRight 6977 */ 6978 public void setNextFocusRightId(int nextFocusRightId) { 6979 mNextFocusRightId = nextFocusRightId; 6980 } 6981 6982 /** 6983 * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. 6984 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6985 * 6986 * @attr ref android.R.styleable#View_nextFocusUp 6987 */ 6988 public int getNextFocusUpId() { 6989 return mNextFocusUpId; 6990 } 6991 6992 /** 6993 * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. 6994 * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should 6995 * decide automatically. 6996 * 6997 * @attr ref android.R.styleable#View_nextFocusUp 6998 */ 6999 public void setNextFocusUpId(int nextFocusUpId) { 7000 mNextFocusUpId = nextFocusUpId; 7001 } 7002 7003 /** 7004 * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 7005 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 7006 * 7007 * @attr ref android.R.styleable#View_nextFocusDown 7008 */ 7009 public int getNextFocusDownId() { 7010 return mNextFocusDownId; 7011 } 7012 7013 /** 7014 * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 7015 * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should 7016 * decide automatically. 7017 * 7018 * @attr ref android.R.styleable#View_nextFocusDown 7019 */ 7020 public void setNextFocusDownId(int nextFocusDownId) { 7021 mNextFocusDownId = nextFocusDownId; 7022 } 7023 7024 /** 7025 * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 7026 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 7027 * 7028 * @attr ref android.R.styleable#View_nextFocusForward 7029 */ 7030 public int getNextFocusForwardId() { 7031 return mNextFocusForwardId; 7032 } 7033 7034 /** 7035 * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 7036 * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should 7037 * decide automatically. 7038 * 7039 * @attr ref android.R.styleable#View_nextFocusForward 7040 */ 7041 public void setNextFocusForwardId(int nextFocusForwardId) { 7042 mNextFocusForwardId = nextFocusForwardId; 7043 } 7044 7045 /** 7046 * Returns the visibility of this view and all of its ancestors 7047 * 7048 * @return True if this view and all of its ancestors are {@link #VISIBLE} 7049 */ 7050 public boolean isShown() { 7051 View current = this; 7052 //noinspection ConstantConditions 7053 do { 7054 if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { 7055 return false; 7056 } 7057 ViewParent parent = current.mParent; 7058 if (parent == null) { 7059 return false; // We are not attached to the view root 7060 } 7061 if (!(parent instanceof View)) { 7062 return true; 7063 } 7064 current = (View) parent; 7065 } while (current != null); 7066 7067 return false; 7068 } 7069 7070 /** 7071 * Called by the view hierarchy when the content insets for a window have 7072 * changed, to allow it to adjust its content to fit within those windows. 7073 * The content insets tell you the space that the status bar, input method, 7074 * and other system windows infringe on the application's window. 7075 * 7076 * <p>You do not normally need to deal with this function, since the default 7077 * window decoration given to applications takes care of applying it to the 7078 * content of the window. If you use {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 7079 * or {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} this will not be the case, 7080 * and your content can be placed under those system elements. You can then 7081 * use this method within your view hierarchy if you have parts of your UI 7082 * which you would like to ensure are not being covered. 7083 * 7084 * <p>The default implementation of this method simply applies the content 7085 * insets to the view's padding, consuming that content (modifying the 7086 * insets to be 0), and returning true. This behavior is off by default, but can 7087 * be enabled through {@link #setFitsSystemWindows(boolean)}. 7088 * 7089 * <p>This function's traversal down the hierarchy is depth-first. The same content 7090 * insets object is propagated down the hierarchy, so any changes made to it will 7091 * be seen by all following views (including potentially ones above in 7092 * the hierarchy since this is a depth-first traversal). The first view 7093 * that returns true will abort the entire traversal. 7094 * 7095 * <p>The default implementation works well for a situation where it is 7096 * used with a container that covers the entire window, allowing it to 7097 * apply the appropriate insets to its content on all edges. If you need 7098 * a more complicated layout (such as two different views fitting system 7099 * windows, one on the top of the window, and one on the bottom), 7100 * you can override the method and handle the insets however you would like. 7101 * Note that the insets provided by the framework are always relative to the 7102 * far edges of the window, not accounting for the location of the called view 7103 * within that window. (In fact when this method is called you do not yet know 7104 * where the layout will place the view, as it is done before layout happens.) 7105 * 7106 * <p>Note: unlike many View methods, there is no dispatch phase to this 7107 * call. If you are overriding it in a ViewGroup and want to allow the 7108 * call to continue to your children, you must be sure to call the super 7109 * implementation. 7110 * 7111 * <p>Here is a sample layout that makes use of fitting system windows 7112 * to have controls for a video view placed inside of the window decorations 7113 * that it hides and shows. This can be used with code like the second 7114 * sample (video player) shown in {@link #setSystemUiVisibility(int)}. 7115 * 7116 * {@sample development/samples/ApiDemos/res/layout/video_player.xml complete} 7117 * 7118 * @param insets Current content insets of the window. Prior to 7119 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN} you must not modify 7120 * the insets or else you and Android will be unhappy. 7121 * 7122 * @return {@code true} if this view applied the insets and it should not 7123 * continue propagating further down the hierarchy, {@code false} otherwise. 7124 * @see #getFitsSystemWindows() 7125 * @see #setFitsSystemWindows(boolean) 7126 * @see #setSystemUiVisibility(int) 7127 * 7128 * @deprecated As of API 20 use {@link #dispatchApplyWindowInsets(WindowInsets)} to apply 7129 * insets to views. Views should override {@link #onApplyWindowInsets(WindowInsets)} or use 7130 * {@link #setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)} 7131 * to implement handling their own insets. 7132 */ 7133 protected boolean fitSystemWindows(Rect insets) { 7134 if ((mPrivateFlags3 & PFLAG3_APPLYING_INSETS) == 0) { 7135 if (insets == null) { 7136 // Null insets by definition have already been consumed. 7137 // This call cannot apply insets since there are none to apply, 7138 // so return false. 7139 return false; 7140 } 7141 // If we're not in the process of dispatching the newer apply insets call, 7142 // that means we're not in the compatibility path. Dispatch into the newer 7143 // apply insets path and take things from there. 7144 try { 7145 mPrivateFlags3 |= PFLAG3_FITTING_SYSTEM_WINDOWS; 7146 return dispatchApplyWindowInsets(new WindowInsets(insets)).isConsumed(); 7147 } finally { 7148 mPrivateFlags3 &= ~PFLAG3_FITTING_SYSTEM_WINDOWS; 7149 } 7150 } else { 7151 // We're being called from the newer apply insets path. 7152 // Perform the standard fallback behavior. 7153 return fitSystemWindowsInt(insets); 7154 } 7155 } 7156 7157 private boolean fitSystemWindowsInt(Rect insets) { 7158 if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { 7159 mUserPaddingStart = UNDEFINED_PADDING; 7160 mUserPaddingEnd = UNDEFINED_PADDING; 7161 Rect localInsets = sThreadLocal.get(); 7162 if (localInsets == null) { 7163 localInsets = new Rect(); 7164 sThreadLocal.set(localInsets); 7165 } 7166 boolean res = computeFitSystemWindows(insets, localInsets); 7167 mUserPaddingLeftInitial = localInsets.left; 7168 mUserPaddingRightInitial = localInsets.right; 7169 internalSetPadding(localInsets.left, localInsets.top, 7170 localInsets.right, localInsets.bottom); 7171 return res; 7172 } 7173 return false; 7174 } 7175 7176 /** 7177 * Called when the view should apply {@link WindowInsets} according to its internal policy. 7178 * 7179 * <p>This method should be overridden by views that wish to apply a policy different from or 7180 * in addition to the default behavior. Clients that wish to force a view subtree 7181 * to apply insets should call {@link #dispatchApplyWindowInsets(WindowInsets)}.</p> 7182 * 7183 * <p>Clients may supply an {@link OnApplyWindowInsetsListener} to a view. If one is set 7184 * it will be called during dispatch instead of this method. The listener may optionally 7185 * call this method from its own implementation if it wishes to apply the view's default 7186 * insets policy in addition to its own.</p> 7187 * 7188 * <p>Implementations of this method should either return the insets parameter unchanged 7189 * or a new {@link WindowInsets} cloned from the supplied insets with any insets consumed 7190 * that this view applied itself. This allows new inset types added in future platform 7191 * versions to pass through existing implementations unchanged without being erroneously 7192 * consumed.</p> 7193 * 7194 * <p>By default if a view's {@link #setFitsSystemWindows(boolean) fitsSystemWindows} 7195 * property is set then the view will consume the system window insets and apply them 7196 * as padding for the view.</p> 7197 * 7198 * @param insets Insets to apply 7199 * @return The supplied insets with any applied insets consumed 7200 */ 7201 public WindowInsets onApplyWindowInsets(WindowInsets insets) { 7202 if ((mPrivateFlags3 & PFLAG3_FITTING_SYSTEM_WINDOWS) == 0) { 7203 // We weren't called from within a direct call to fitSystemWindows, 7204 // call into it as a fallback in case we're in a class that overrides it 7205 // and has logic to perform. 7206 if (fitSystemWindows(insets.getSystemWindowInsets())) { 7207 return insets.consumeSystemWindowInsets(); 7208 } 7209 } else { 7210 // We were called from within a direct call to fitSystemWindows. 7211 if (fitSystemWindowsInt(insets.getSystemWindowInsets())) { 7212 return insets.consumeSystemWindowInsets(); 7213 } 7214 } 7215 return insets; 7216 } 7217 7218 /** 7219 * Set an {@link OnApplyWindowInsetsListener} to take over the policy for applying 7220 * window insets to this view. The listener's 7221 * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} 7222 * method will be called instead of the view's 7223 * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. 7224 * 7225 * @param listener Listener to set 7226 * 7227 * @see #onApplyWindowInsets(WindowInsets) 7228 */ 7229 public void setOnApplyWindowInsetsListener(OnApplyWindowInsetsListener listener) { 7230 getListenerInfo().mOnApplyWindowInsetsListener = listener; 7231 } 7232 7233 /** 7234 * Request to apply the given window insets to this view or another view in its subtree. 7235 * 7236 * <p>This method should be called by clients wishing to apply insets corresponding to areas 7237 * obscured by window decorations or overlays. This can include the status and navigation bars, 7238 * action bars, input methods and more. New inset categories may be added in the future. 7239 * The method returns the insets provided minus any that were applied by this view or its 7240 * children.</p> 7241 * 7242 * <p>Clients wishing to provide custom behavior should override the 7243 * {@link #onApplyWindowInsets(WindowInsets)} method or alternatively provide a 7244 * {@link OnApplyWindowInsetsListener} via the 7245 * {@link #setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) setOnApplyWindowInsetsListener} 7246 * method.</p> 7247 * 7248 * <p>This method replaces the older {@link #fitSystemWindows(Rect) fitSystemWindows} method. 7249 * </p> 7250 * 7251 * @param insets Insets to apply 7252 * @return The provided insets minus the insets that were consumed 7253 */ 7254 public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { 7255 try { 7256 mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; 7257 if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { 7258 return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); 7259 } else { 7260 return onApplyWindowInsets(insets); 7261 } 7262 } finally { 7263 mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; 7264 } 7265 } 7266 7267 /** 7268 * Provide original WindowInsets that are dispatched to the view hierarchy. The insets are 7269 * only available if the view is attached. 7270 * 7271 * @return WindowInsets from the top of the view hierarchy or null if View is detached 7272 */ 7273 public WindowInsets getRootWindowInsets() { 7274 if (mAttachInfo != null) { 7275 return mAttachInfo.mViewRootImpl.getWindowInsets(false /* forceConstruct */); 7276 } 7277 return null; 7278 } 7279 7280 /** 7281 * @hide Compute the insets that should be consumed by this view and the ones 7282 * that should propagate to those under it. 7283 */ 7284 protected boolean computeFitSystemWindows(Rect inoutInsets, Rect outLocalInsets) { 7285 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 7286 || mAttachInfo == null 7287 || ((mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0 7288 && !mAttachInfo.mOverscanRequested)) { 7289 outLocalInsets.set(inoutInsets); 7290 inoutInsets.set(0, 0, 0, 0); 7291 return true; 7292 } else { 7293 // The application wants to take care of fitting system window for 7294 // the content... however we still need to take care of any overscan here. 7295 final Rect overscan = mAttachInfo.mOverscanInsets; 7296 outLocalInsets.set(overscan); 7297 inoutInsets.left -= overscan.left; 7298 inoutInsets.top -= overscan.top; 7299 inoutInsets.right -= overscan.right; 7300 inoutInsets.bottom -= overscan.bottom; 7301 return false; 7302 } 7303 } 7304 7305 /** 7306 * Compute insets that should be consumed by this view and the ones that should propagate 7307 * to those under it. 7308 * 7309 * @param in Insets currently being processed by this View, likely received as a parameter 7310 * to {@link #onApplyWindowInsets(WindowInsets)}. 7311 * @param outLocalInsets A Rect that will receive the insets that should be consumed 7312 * by this view 7313 * @return Insets that should be passed along to views under this one 7314 */ 7315 public WindowInsets computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets) { 7316 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 7317 || mAttachInfo == null 7318 || (mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0) { 7319 outLocalInsets.set(in.getSystemWindowInsets()); 7320 return in.consumeSystemWindowInsets(); 7321 } else { 7322 outLocalInsets.set(0, 0, 0, 0); 7323 return in; 7324 } 7325 } 7326 7327 /** 7328 * Sets whether or not this view should account for system screen decorations 7329 * such as the status bar and inset its content; that is, controlling whether 7330 * the default implementation of {@link #fitSystemWindows(Rect)} will be 7331 * executed. See that method for more details. 7332 * 7333 * <p>Note that if you are providing your own implementation of 7334 * {@link #fitSystemWindows(Rect)}, then there is no need to set this 7335 * flag to true -- your implementation will be overriding the default 7336 * implementation that checks this flag. 7337 * 7338 * @param fitSystemWindows If true, then the default implementation of 7339 * {@link #fitSystemWindows(Rect)} will be executed. 7340 * 7341 * @attr ref android.R.styleable#View_fitsSystemWindows 7342 * @see #getFitsSystemWindows() 7343 * @see #fitSystemWindows(Rect) 7344 * @see #setSystemUiVisibility(int) 7345 */ 7346 public void setFitsSystemWindows(boolean fitSystemWindows) { 7347 setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); 7348 } 7349 7350 /** 7351 * Check for state of {@link #setFitsSystemWindows(boolean)}. If this method 7352 * returns {@code true}, the default implementation of {@link #fitSystemWindows(Rect)} 7353 * will be executed. 7354 * 7355 * @return {@code true} if the default implementation of 7356 * {@link #fitSystemWindows(Rect)} will be executed. 7357 * 7358 * @attr ref android.R.styleable#View_fitsSystemWindows 7359 * @see #setFitsSystemWindows(boolean) 7360 * @see #fitSystemWindows(Rect) 7361 * @see #setSystemUiVisibility(int) 7362 */ 7363 @ViewDebug.ExportedProperty 7364 public boolean getFitsSystemWindows() { 7365 return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; 7366 } 7367 7368 /** @hide */ 7369 public boolean fitsSystemWindows() { 7370 return getFitsSystemWindows(); 7371 } 7372 7373 /** 7374 * Ask that a new dispatch of {@link #fitSystemWindows(Rect)} be performed. 7375 * @deprecated Use {@link #requestApplyInsets()} for newer platform versions. 7376 */ 7377 public void requestFitSystemWindows() { 7378 if (mParent != null) { 7379 mParent.requestFitSystemWindows(); 7380 } 7381 } 7382 7383 /** 7384 * Ask that a new dispatch of {@link #onApplyWindowInsets(WindowInsets)} be performed. 7385 */ 7386 public void requestApplyInsets() { 7387 requestFitSystemWindows(); 7388 } 7389 7390 /** 7391 * For use by PhoneWindow to make its own system window fitting optional. 7392 * @hide 7393 */ 7394 public void makeOptionalFitsSystemWindows() { 7395 setFlags(OPTIONAL_FITS_SYSTEM_WINDOWS, OPTIONAL_FITS_SYSTEM_WINDOWS); 7396 } 7397 7398 /** 7399 * Returns the outsets, which areas of the device that aren't a surface, but we would like to 7400 * treat them as such. 7401 * @hide 7402 */ 7403 public void getOutsets(Rect outOutsetRect) { 7404 if (mAttachInfo != null) { 7405 outOutsetRect.set(mAttachInfo.mOutsets); 7406 } else { 7407 outOutsetRect.setEmpty(); 7408 } 7409 } 7410 7411 /** 7412 * Returns the visibility status for this view. 7413 * 7414 * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 7415 * @attr ref android.R.styleable#View_visibility 7416 */ 7417 @ViewDebug.ExportedProperty(mapping = { 7418 @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), 7419 @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), 7420 @ViewDebug.IntToString(from = GONE, to = "GONE") 7421 }) 7422 @Visibility 7423 public int getVisibility() { 7424 return mViewFlags & VISIBILITY_MASK; 7425 } 7426 7427 /** 7428 * Set the enabled state of this view. 7429 * 7430 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 7431 * @attr ref android.R.styleable#View_visibility 7432 */ 7433 @RemotableViewMethod 7434 public void setVisibility(@Visibility int visibility) { 7435 setFlags(visibility, VISIBILITY_MASK); 7436 } 7437 7438 /** 7439 * Returns the enabled status for this view. The interpretation of the 7440 * enabled state varies by subclass. 7441 * 7442 * @return True if this view is enabled, false otherwise. 7443 */ 7444 @ViewDebug.ExportedProperty 7445 public boolean isEnabled() { 7446 return (mViewFlags & ENABLED_MASK) == ENABLED; 7447 } 7448 7449 /** 7450 * Set the enabled state of this view. The interpretation of the enabled 7451 * state varies by subclass. 7452 * 7453 * @param enabled True if this view is enabled, false otherwise. 7454 */ 7455 @RemotableViewMethod 7456 public void setEnabled(boolean enabled) { 7457 if (enabled == isEnabled()) return; 7458 7459 setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); 7460 7461 /* 7462 * The View most likely has to change its appearance, so refresh 7463 * the drawable state. 7464 */ 7465 refreshDrawableState(); 7466 7467 // Invalidate too, since the default behavior for views is to be 7468 // be drawn at 50% alpha rather than to change the drawable. 7469 invalidate(true); 7470 7471 if (!enabled) { 7472 cancelPendingInputEvents(); 7473 } 7474 } 7475 7476 /** 7477 * Set whether this view can receive the focus. 7478 * 7479 * Setting this to false will also ensure that this view is not focusable 7480 * in touch mode. 7481 * 7482 * @param focusable If true, this view can receive the focus. 7483 * 7484 * @see #setFocusableInTouchMode(boolean) 7485 * @attr ref android.R.styleable#View_focusable 7486 */ 7487 public void setFocusable(boolean focusable) { 7488 if (!focusable) { 7489 setFlags(0, FOCUSABLE_IN_TOUCH_MODE); 7490 } 7491 setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); 7492 } 7493 7494 /** 7495 * Set whether this view can receive focus while in touch mode. 7496 * 7497 * Setting this to true will also ensure that this view is focusable. 7498 * 7499 * @param focusableInTouchMode If true, this view can receive the focus while 7500 * in touch mode. 7501 * 7502 * @see #setFocusable(boolean) 7503 * @attr ref android.R.styleable#View_focusableInTouchMode 7504 */ 7505 public void setFocusableInTouchMode(boolean focusableInTouchMode) { 7506 // Focusable in touch mode should always be set before the focusable flag 7507 // otherwise, setting the focusable flag will trigger a focusableViewAvailable() 7508 // which, in touch mode, will not successfully request focus on this view 7509 // because the focusable in touch mode flag is not set 7510 setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); 7511 if (focusableInTouchMode) { 7512 setFlags(FOCUSABLE, FOCUSABLE_MASK); 7513 } 7514 } 7515 7516 /** 7517 * Set whether this view should have sound effects enabled for events such as 7518 * clicking and touching. 7519 * 7520 * <p>You may wish to disable sound effects for a view if you already play sounds, 7521 * for instance, a dial key that plays dtmf tones. 7522 * 7523 * @param soundEffectsEnabled whether sound effects are enabled for this view. 7524 * @see #isSoundEffectsEnabled() 7525 * @see #playSoundEffect(int) 7526 * @attr ref android.R.styleable#View_soundEffectsEnabled 7527 */ 7528 public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { 7529 setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); 7530 } 7531 7532 /** 7533 * @return whether this view should have sound effects enabled for events such as 7534 * clicking and touching. 7535 * 7536 * @see #setSoundEffectsEnabled(boolean) 7537 * @see #playSoundEffect(int) 7538 * @attr ref android.R.styleable#View_soundEffectsEnabled 7539 */ 7540 @ViewDebug.ExportedProperty 7541 public boolean isSoundEffectsEnabled() { 7542 return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); 7543 } 7544 7545 /** 7546 * Set whether this view should have haptic feedback for events such as 7547 * long presses. 7548 * 7549 * <p>You may wish to disable haptic feedback if your view already controls 7550 * its own haptic feedback. 7551 * 7552 * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. 7553 * @see #isHapticFeedbackEnabled() 7554 * @see #performHapticFeedback(int) 7555 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 7556 */ 7557 public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { 7558 setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); 7559 } 7560 7561 /** 7562 * @return whether this view should have haptic feedback enabled for events 7563 * long presses. 7564 * 7565 * @see #setHapticFeedbackEnabled(boolean) 7566 * @see #performHapticFeedback(int) 7567 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 7568 */ 7569 @ViewDebug.ExportedProperty 7570 public boolean isHapticFeedbackEnabled() { 7571 return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); 7572 } 7573 7574 /** 7575 * Returns the layout direction for this view. 7576 * 7577 * @return One of {@link #LAYOUT_DIRECTION_LTR}, 7578 * {@link #LAYOUT_DIRECTION_RTL}, 7579 * {@link #LAYOUT_DIRECTION_INHERIT} or 7580 * {@link #LAYOUT_DIRECTION_LOCALE}. 7581 * 7582 * @attr ref android.R.styleable#View_layoutDirection 7583 * 7584 * @hide 7585 */ 7586 @ViewDebug.ExportedProperty(category = "layout", mapping = { 7587 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), 7588 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), 7589 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), 7590 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") 7591 }) 7592 @LayoutDir 7593 public int getRawLayoutDirection() { 7594 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 7595 } 7596 7597 /** 7598 * Set the layout direction for this view. This will propagate a reset of layout direction 7599 * resolution to the view's children and resolve layout direction for this view. 7600 * 7601 * @param layoutDirection the layout direction to set. Should be one of: 7602 * 7603 * {@link #LAYOUT_DIRECTION_LTR}, 7604 * {@link #LAYOUT_DIRECTION_RTL}, 7605 * {@link #LAYOUT_DIRECTION_INHERIT}, 7606 * {@link #LAYOUT_DIRECTION_LOCALE}. 7607 * 7608 * Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution 7609 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 7610 * will return the default {@link #LAYOUT_DIRECTION_LTR}. 7611 * 7612 * @attr ref android.R.styleable#View_layoutDirection 7613 */ 7614 @RemotableViewMethod 7615 public void setLayoutDirection(@LayoutDir int layoutDirection) { 7616 if (getRawLayoutDirection() != layoutDirection) { 7617 // Reset the current layout direction and the resolved one 7618 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_MASK; 7619 resetRtlProperties(); 7620 // Set the new layout direction (filtered) 7621 mPrivateFlags2 |= 7622 ((layoutDirection << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) & PFLAG2_LAYOUT_DIRECTION_MASK); 7623 // We need to resolve all RTL properties as they all depend on layout direction 7624 resolveRtlPropertiesIfNeeded(); 7625 requestLayout(); 7626 invalidate(true); 7627 } 7628 } 7629 7630 /** 7631 * Returns the resolved layout direction for this view. 7632 * 7633 * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns 7634 * {@link #LAYOUT_DIRECTION_LTR} if the layout direction is not RTL. 7635 * 7636 * For compatibility, this will return {@link #LAYOUT_DIRECTION_LTR} if API version 7637 * is lower than {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}. 7638 * 7639 * @attr ref android.R.styleable#View_layoutDirection 7640 */ 7641 @ViewDebug.ExportedProperty(category = "layout", mapping = { 7642 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), 7643 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") 7644 }) 7645 @ResolvedLayoutDir 7646 public int getLayoutDirection() { 7647 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 7648 if (targetSdkVersion < JELLY_BEAN_MR1) { 7649 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 7650 return LAYOUT_DIRECTION_RESOLVED_DEFAULT; 7651 } 7652 return ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) == 7653 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) ? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; 7654 } 7655 7656 /** 7657 * Indicates whether or not this view's layout is right-to-left. This is resolved from 7658 * layout attribute and/or the inherited value from the parent 7659 * 7660 * @return true if the layout is right-to-left. 7661 * 7662 * @hide 7663 */ 7664 @ViewDebug.ExportedProperty(category = "layout") 7665 public boolean isLayoutRtl() { 7666 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 7667 } 7668 7669 /** 7670 * Indicates whether the view is currently tracking transient state that the 7671 * app should not need to concern itself with saving and restoring, but that 7672 * the framework should take special note to preserve when possible. 7673 * 7674 * <p>A view with transient state cannot be trivially rebound from an external 7675 * data source, such as an adapter binding item views in a list. This may be 7676 * because the view is performing an animation, tracking user selection 7677 * of content, or similar.</p> 7678 * 7679 * @return true if the view has transient state 7680 */ 7681 @ViewDebug.ExportedProperty(category = "layout") 7682 public boolean hasTransientState() { 7683 return (mPrivateFlags2 & PFLAG2_HAS_TRANSIENT_STATE) == PFLAG2_HAS_TRANSIENT_STATE; 7684 } 7685 7686 /** 7687 * Set whether this view is currently tracking transient state that the 7688 * framework should attempt to preserve when possible. This flag is reference counted, 7689 * so every call to setHasTransientState(true) should be paired with a later call 7690 * to setHasTransientState(false). 7691 * 7692 * <p>A view with transient state cannot be trivially rebound from an external 7693 * data source, such as an adapter binding item views in a list. This may be 7694 * because the view is performing an animation, tracking user selection 7695 * of content, or similar.</p> 7696 * 7697 * @param hasTransientState true if this view has transient state 7698 */ 7699 public void setHasTransientState(boolean hasTransientState) { 7700 mTransientStateCount = hasTransientState ? mTransientStateCount + 1 : 7701 mTransientStateCount - 1; 7702 if (mTransientStateCount < 0) { 7703 mTransientStateCount = 0; 7704 Log.e(VIEW_LOG_TAG, "hasTransientState decremented below 0: " + 7705 "unmatched pair of setHasTransientState calls"); 7706 } else if ((hasTransientState && mTransientStateCount == 1) || 7707 (!hasTransientState && mTransientStateCount == 0)) { 7708 // update flag if we've just incremented up from 0 or decremented down to 0 7709 mPrivateFlags2 = (mPrivateFlags2 & ~PFLAG2_HAS_TRANSIENT_STATE) | 7710 (hasTransientState ? PFLAG2_HAS_TRANSIENT_STATE : 0); 7711 if (mParent != null) { 7712 try { 7713 mParent.childHasTransientStateChanged(this, hasTransientState); 7714 } catch (AbstractMethodError e) { 7715 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 7716 " does not fully implement ViewParent", e); 7717 } 7718 } 7719 } 7720 } 7721 7722 /** 7723 * Returns true if this view is currently attached to a window. 7724 */ 7725 public boolean isAttachedToWindow() { 7726 return mAttachInfo != null; 7727 } 7728 7729 /** 7730 * Returns true if this view has been through at least one layout since it 7731 * was last attached to or detached from a window. 7732 */ 7733 public boolean isLaidOut() { 7734 return (mPrivateFlags3 & PFLAG3_IS_LAID_OUT) == PFLAG3_IS_LAID_OUT; 7735 } 7736 7737 /** 7738 * If this view doesn't do any drawing on its own, set this flag to 7739 * allow further optimizations. By default, this flag is not set on 7740 * View, but could be set on some View subclasses such as ViewGroup. 7741 * 7742 * Typically, if you override {@link #onDraw(android.graphics.Canvas)} 7743 * you should clear this flag. 7744 * 7745 * @param willNotDraw whether or not this View draw on its own 7746 */ 7747 public void setWillNotDraw(boolean willNotDraw) { 7748 setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); 7749 } 7750 7751 /** 7752 * Returns whether or not this View draws on its own. 7753 * 7754 * @return true if this view has nothing to draw, false otherwise 7755 */ 7756 @ViewDebug.ExportedProperty(category = "drawing") 7757 public boolean willNotDraw() { 7758 return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; 7759 } 7760 7761 /** 7762 * When a View's drawing cache is enabled, drawing is redirected to an 7763 * offscreen bitmap. Some views, like an ImageView, must be able to 7764 * bypass this mechanism if they already draw a single bitmap, to avoid 7765 * unnecessary usage of the memory. 7766 * 7767 * @param willNotCacheDrawing true if this view does not cache its 7768 * drawing, false otherwise 7769 */ 7770 public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { 7771 setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); 7772 } 7773 7774 /** 7775 * Returns whether or not this View can cache its drawing or not. 7776 * 7777 * @return true if this view does not cache its drawing, false otherwise 7778 */ 7779 @ViewDebug.ExportedProperty(category = "drawing") 7780 public boolean willNotCacheDrawing() { 7781 return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; 7782 } 7783 7784 /** 7785 * Indicates whether this view reacts to click events or not. 7786 * 7787 * @return true if the view is clickable, false otherwise 7788 * 7789 * @see #setClickable(boolean) 7790 * @attr ref android.R.styleable#View_clickable 7791 */ 7792 @ViewDebug.ExportedProperty 7793 public boolean isClickable() { 7794 return (mViewFlags & CLICKABLE) == CLICKABLE; 7795 } 7796 7797 /** 7798 * Enables or disables click events for this view. When a view 7799 * is clickable it will change its state to "pressed" on every click. 7800 * Subclasses should set the view clickable to visually react to 7801 * user's clicks. 7802 * 7803 * @param clickable true to make the view clickable, false otherwise 7804 * 7805 * @see #isClickable() 7806 * @attr ref android.R.styleable#View_clickable 7807 */ 7808 public void setClickable(boolean clickable) { 7809 setFlags(clickable ? CLICKABLE : 0, CLICKABLE); 7810 } 7811 7812 /** 7813 * Indicates whether this view reacts to long click events or not. 7814 * 7815 * @return true if the view is long clickable, false otherwise 7816 * 7817 * @see #setLongClickable(boolean) 7818 * @attr ref android.R.styleable#View_longClickable 7819 */ 7820 public boolean isLongClickable() { 7821 return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 7822 } 7823 7824 /** 7825 * Enables or disables long click events for this view. When a view is long 7826 * clickable it reacts to the user holding down the button for a longer 7827 * duration than a tap. This event can either launch the listener or a 7828 * context menu. 7829 * 7830 * @param longClickable true to make the view long clickable, false otherwise 7831 * @see #isLongClickable() 7832 * @attr ref android.R.styleable#View_longClickable 7833 */ 7834 public void setLongClickable(boolean longClickable) { 7835 setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); 7836 } 7837 7838 /** 7839 * Indicates whether this view reacts to context clicks or not. 7840 * 7841 * @return true if the view is context clickable, false otherwise 7842 * @see #setContextClickable(boolean) 7843 * @attr ref android.R.styleable#View_contextClickable 7844 */ 7845 public boolean isContextClickable() { 7846 return (mViewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE; 7847 } 7848 7849 /** 7850 * Enables or disables context clicking for this view. This event can launch the listener. 7851 * 7852 * @param contextClickable true to make the view react to a context click, false otherwise 7853 * @see #isContextClickable() 7854 * @attr ref android.R.styleable#View_contextClickable 7855 */ 7856 public void setContextClickable(boolean contextClickable) { 7857 setFlags(contextClickable ? CONTEXT_CLICKABLE : 0, CONTEXT_CLICKABLE); 7858 } 7859 7860 /** 7861 * Sets the pressed state for this view and provides a touch coordinate for 7862 * animation hinting. 7863 * 7864 * @param pressed Pass true to set the View's internal state to "pressed", 7865 * or false to reverts the View's internal state from a 7866 * previously set "pressed" state. 7867 * @param x The x coordinate of the touch that caused the press 7868 * @param y The y coordinate of the touch that caused the press 7869 */ 7870 private void setPressed(boolean pressed, float x, float y) { 7871 if (pressed) { 7872 drawableHotspotChanged(x, y); 7873 } 7874 7875 setPressed(pressed); 7876 } 7877 7878 /** 7879 * Sets the pressed state for this view. 7880 * 7881 * @see #isClickable() 7882 * @see #setClickable(boolean) 7883 * 7884 * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts 7885 * the View's internal state from a previously set "pressed" state. 7886 */ 7887 public void setPressed(boolean pressed) { 7888 final boolean needsRefresh = pressed != ((mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED); 7889 7890 if (pressed) { 7891 mPrivateFlags |= PFLAG_PRESSED; 7892 } else { 7893 mPrivateFlags &= ~PFLAG_PRESSED; 7894 } 7895 7896 if (needsRefresh) { 7897 refreshDrawableState(); 7898 } 7899 dispatchSetPressed(pressed); 7900 } 7901 7902 /** 7903 * Dispatch setPressed to all of this View's children. 7904 * 7905 * @see #setPressed(boolean) 7906 * 7907 * @param pressed The new pressed state 7908 */ 7909 protected void dispatchSetPressed(boolean pressed) { 7910 } 7911 7912 /** 7913 * Indicates whether the view is currently in pressed state. Unless 7914 * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter 7915 * the pressed state. 7916 * 7917 * @see #setPressed(boolean) 7918 * @see #isClickable() 7919 * @see #setClickable(boolean) 7920 * 7921 * @return true if the view is currently pressed, false otherwise 7922 */ 7923 @ViewDebug.ExportedProperty 7924 public boolean isPressed() { 7925 return (mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED; 7926 } 7927 7928 /** 7929 * @hide 7930 * Indicates whether this view will participate in data collection through 7931 * {@link ViewStructure}. If true, it will not provide any data 7932 * for itself or its children. If false, the normal data collection will be allowed. 7933 * 7934 * @return Returns false if assist data collection is not blocked, else true. 7935 * 7936 * @see #setAssistBlocked(boolean) 7937 * @attr ref android.R.styleable#View_assistBlocked 7938 */ 7939 public boolean isAssistBlocked() { 7940 return (mPrivateFlags3 & PFLAG3_ASSIST_BLOCKED) != 0; 7941 } 7942 7943 /** 7944 * @hide 7945 * Controls whether assist data collection from this view and its children is enabled 7946 * (that is, whether {@link #onProvideStructure} and 7947 * {@link #onProvideVirtualStructure} will be called). The default value is false, 7948 * allowing normal assist collection. Setting this to false will disable assist collection. 7949 * 7950 * @param enabled Set to true to <em>disable</em> assist data collection, or false 7951 * (the default) to allow it. 7952 * 7953 * @see #isAssistBlocked() 7954 * @see #onProvideStructure 7955 * @see #onProvideVirtualStructure 7956 * @attr ref android.R.styleable#View_assistBlocked 7957 */ 7958 public void setAssistBlocked(boolean enabled) { 7959 if (enabled) { 7960 mPrivateFlags3 |= PFLAG3_ASSIST_BLOCKED; 7961 } else { 7962 mPrivateFlags3 &= ~PFLAG3_ASSIST_BLOCKED; 7963 } 7964 } 7965 7966 /** 7967 * Indicates whether this view will save its state (that is, 7968 * whether its {@link #onSaveInstanceState} method will be called). 7969 * 7970 * @return Returns true if the view state saving is enabled, else false. 7971 * 7972 * @see #setSaveEnabled(boolean) 7973 * @attr ref android.R.styleable#View_saveEnabled 7974 */ 7975 public boolean isSaveEnabled() { 7976 return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; 7977 } 7978 7979 /** 7980 * Controls whether the saving of this view's state is 7981 * enabled (that is, whether its {@link #onSaveInstanceState} method 7982 * will be called). Note that even if freezing is enabled, the 7983 * view still must have an id assigned to it (via {@link #setId(int)}) 7984 * for its state to be saved. This flag can only disable the 7985 * saving of this view; any child views may still have their state saved. 7986 * 7987 * @param enabled Set to false to <em>disable</em> state saving, or true 7988 * (the default) to allow it. 7989 * 7990 * @see #isSaveEnabled() 7991 * @see #setId(int) 7992 * @see #onSaveInstanceState() 7993 * @attr ref android.R.styleable#View_saveEnabled 7994 */ 7995 public void setSaveEnabled(boolean enabled) { 7996 setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); 7997 } 7998 7999 /** 8000 * Gets whether the framework should discard touches when the view's 8001 * window is obscured by another visible window. 8002 * Refer to the {@link View} security documentation for more details. 8003 * 8004 * @return True if touch filtering is enabled. 8005 * 8006 * @see #setFilterTouchesWhenObscured(boolean) 8007 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 8008 */ 8009 @ViewDebug.ExportedProperty 8010 public boolean getFilterTouchesWhenObscured() { 8011 return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; 8012 } 8013 8014 /** 8015 * Sets whether the framework should discard touches when the view's 8016 * window is obscured by another visible window. 8017 * Refer to the {@link View} security documentation for more details. 8018 * 8019 * @param enabled True if touch filtering should be enabled. 8020 * 8021 * @see #getFilterTouchesWhenObscured 8022 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 8023 */ 8024 public void setFilterTouchesWhenObscured(boolean enabled) { 8025 setFlags(enabled ? FILTER_TOUCHES_WHEN_OBSCURED : 0, 8026 FILTER_TOUCHES_WHEN_OBSCURED); 8027 } 8028 8029 /** 8030 * Indicates whether the entire hierarchy under this view will save its 8031 * state when a state saving traversal occurs from its parent. The default 8032 * is true; if false, these views will not be saved unless 8033 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 8034 * 8035 * @return Returns true if the view state saving from parent is enabled, else false. 8036 * 8037 * @see #setSaveFromParentEnabled(boolean) 8038 */ 8039 public boolean isSaveFromParentEnabled() { 8040 return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; 8041 } 8042 8043 /** 8044 * Controls whether the entire hierarchy under this view will save its 8045 * state when a state saving traversal occurs from its parent. The default 8046 * is true; if false, these views will not be saved unless 8047 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 8048 * 8049 * @param enabled Set to false to <em>disable</em> state saving, or true 8050 * (the default) to allow it. 8051 * 8052 * @see #isSaveFromParentEnabled() 8053 * @see #setId(int) 8054 * @see #onSaveInstanceState() 8055 */ 8056 public void setSaveFromParentEnabled(boolean enabled) { 8057 setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); 8058 } 8059 8060 8061 /** 8062 * Returns whether this View is able to take focus. 8063 * 8064 * @return True if this view can take focus, or false otherwise. 8065 * @attr ref android.R.styleable#View_focusable 8066 */ 8067 @ViewDebug.ExportedProperty(category = "focus") 8068 public final boolean isFocusable() { 8069 return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); 8070 } 8071 8072 /** 8073 * When a view is focusable, it may not want to take focus when in touch mode. 8074 * For example, a button would like focus when the user is navigating via a D-pad 8075 * so that the user can click on it, but once the user starts touching the screen, 8076 * the button shouldn't take focus 8077 * @return Whether the view is focusable in touch mode. 8078 * @attr ref android.R.styleable#View_focusableInTouchMode 8079 */ 8080 @ViewDebug.ExportedProperty 8081 public final boolean isFocusableInTouchMode() { 8082 return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); 8083 } 8084 8085 /** 8086 * Find the nearest view in the specified direction that can take focus. 8087 * This does not actually give focus to that view. 8088 * 8089 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 8090 * 8091 * @return The nearest focusable in the specified direction, or null if none 8092 * can be found. 8093 */ 8094 public View focusSearch(@FocusRealDirection int direction) { 8095 if (mParent != null) { 8096 return mParent.focusSearch(this, direction); 8097 } else { 8098 return null; 8099 } 8100 } 8101 8102 /** 8103 * This method is the last chance for the focused view and its ancestors to 8104 * respond to an arrow key. This is called when the focused view did not 8105 * consume the key internally, nor could the view system find a new view in 8106 * the requested direction to give focus to. 8107 * 8108 * @param focused The currently focused view. 8109 * @param direction The direction focus wants to move. One of FOCUS_UP, 8110 * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. 8111 * @return True if the this view consumed this unhandled move. 8112 */ 8113 public boolean dispatchUnhandledMove(View focused, @FocusRealDirection int direction) { 8114 return false; 8115 } 8116 8117 /** 8118 * If a user manually specified the next view id for a particular direction, 8119 * use the root to look up the view. 8120 * @param root The root view of the hierarchy containing this view. 8121 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, 8122 * or FOCUS_BACKWARD. 8123 * @return The user specified next view, or null if there is none. 8124 */ 8125 View findUserSetNextFocus(View root, @FocusDirection int direction) { 8126 switch (direction) { 8127 case FOCUS_LEFT: 8128 if (mNextFocusLeftId == View.NO_ID) return null; 8129 return findViewInsideOutShouldExist(root, mNextFocusLeftId); 8130 case FOCUS_RIGHT: 8131 if (mNextFocusRightId == View.NO_ID) return null; 8132 return findViewInsideOutShouldExist(root, mNextFocusRightId); 8133 case FOCUS_UP: 8134 if (mNextFocusUpId == View.NO_ID) return null; 8135 return findViewInsideOutShouldExist(root, mNextFocusUpId); 8136 case FOCUS_DOWN: 8137 if (mNextFocusDownId == View.NO_ID) return null; 8138 return findViewInsideOutShouldExist(root, mNextFocusDownId); 8139 case FOCUS_FORWARD: 8140 if (mNextFocusForwardId == View.NO_ID) return null; 8141 return findViewInsideOutShouldExist(root, mNextFocusForwardId); 8142 case FOCUS_BACKWARD: { 8143 if (mID == View.NO_ID) return null; 8144 final int id = mID; 8145 return root.findViewByPredicateInsideOut(this, new Predicate<View>() { 8146 @Override 8147 public boolean apply(View t) { 8148 return t.mNextFocusForwardId == id; 8149 } 8150 }); 8151 } 8152 } 8153 return null; 8154 } 8155 8156 private View findViewInsideOutShouldExist(View root, int id) { 8157 if (mMatchIdPredicate == null) { 8158 mMatchIdPredicate = new MatchIdPredicate(); 8159 } 8160 mMatchIdPredicate.mId = id; 8161 View result = root.findViewByPredicateInsideOut(this, mMatchIdPredicate); 8162 if (result == null) { 8163 Log.w(VIEW_LOG_TAG, "couldn't find view with id " + id); 8164 } 8165 return result; 8166 } 8167 8168 /** 8169 * Find and return all focusable views that are descendants of this view, 8170 * possibly including this view if it is focusable itself. 8171 * 8172 * @param direction The direction of the focus 8173 * @return A list of focusable views 8174 */ 8175 public ArrayList<View> getFocusables(@FocusDirection int direction) { 8176 ArrayList<View> result = new ArrayList<View>(24); 8177 addFocusables(result, direction); 8178 return result; 8179 } 8180 8181 /** 8182 * Add any focusable views that are descendants of this view (possibly 8183 * including this view if it is focusable itself) to views. If we are in touch mode, 8184 * only add views that are also focusable in touch mode. 8185 * 8186 * @param views Focusable views found so far 8187 * @param direction The direction of the focus 8188 */ 8189 public void addFocusables(ArrayList<View> views, @FocusDirection int direction) { 8190 addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); 8191 } 8192 8193 /** 8194 * Adds any focusable views that are descendants of this view (possibly 8195 * including this view if it is focusable itself) to views. This method 8196 * adds all focusable views regardless if we are in touch mode or 8197 * only views focusable in touch mode if we are in touch mode or 8198 * only views that can take accessibility focus if accessibility is enabled 8199 * depending on the focusable mode parameter. 8200 * 8201 * @param views Focusable views found so far or null if all we are interested is 8202 * the number of focusables. 8203 * @param direction The direction of the focus. 8204 * @param focusableMode The type of focusables to be added. 8205 * 8206 * @see #FOCUSABLES_ALL 8207 * @see #FOCUSABLES_TOUCH_MODE 8208 */ 8209 public void addFocusables(ArrayList<View> views, @FocusDirection int direction, 8210 @FocusableMode int focusableMode) { 8211 if (views == null) { 8212 return; 8213 } 8214 if (!isFocusable()) { 8215 return; 8216 } 8217 if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE 8218 && isInTouchMode() && !isFocusableInTouchMode()) { 8219 return; 8220 } 8221 views.add(this); 8222 } 8223 8224 /** 8225 * Finds the Views that contain given text. The containment is case insensitive. 8226 * The search is performed by either the text that the View renders or the content 8227 * description that describes the view for accessibility purposes and the view does 8228 * not render or both. Clients can specify how the search is to be performed via 8229 * passing the {@link #FIND_VIEWS_WITH_TEXT} and 8230 * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. 8231 * 8232 * @param outViews The output list of matching Views. 8233 * @param searched The text to match against. 8234 * 8235 * @see #FIND_VIEWS_WITH_TEXT 8236 * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION 8237 * @see #setContentDescription(CharSequence) 8238 */ 8239 public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, 8240 @FindViewFlags int flags) { 8241 if (getAccessibilityNodeProvider() != null) { 8242 if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { 8243 outViews.add(this); 8244 } 8245 } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 8246 && (searched != null && searched.length() > 0) 8247 && (mContentDescription != null && mContentDescription.length() > 0)) { 8248 String searchedLowerCase = searched.toString().toLowerCase(); 8249 String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); 8250 if (contentDescriptionLowerCase.contains(searchedLowerCase)) { 8251 outViews.add(this); 8252 } 8253 } 8254 } 8255 8256 /** 8257 * Find and return all touchable views that are descendants of this view, 8258 * possibly including this view if it is touchable itself. 8259 * 8260 * @return A list of touchable views 8261 */ 8262 public ArrayList<View> getTouchables() { 8263 ArrayList<View> result = new ArrayList<View>(); 8264 addTouchables(result); 8265 return result; 8266 } 8267 8268 /** 8269 * Add any touchable views that are descendants of this view (possibly 8270 * including this view if it is touchable itself) to views. 8271 * 8272 * @param views Touchable views found so far 8273 */ 8274 public void addTouchables(ArrayList<View> views) { 8275 final int viewFlags = mViewFlags; 8276 8277 if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE 8278 || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) 8279 && (viewFlags & ENABLED_MASK) == ENABLED) { 8280 views.add(this); 8281 } 8282 } 8283 8284 /** 8285 * Returns whether this View is accessibility focused. 8286 * 8287 * @return True if this View is accessibility focused. 8288 */ 8289 public boolean isAccessibilityFocused() { 8290 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0; 8291 } 8292 8293 /** 8294 * Call this to try to give accessibility focus to this view. 8295 * 8296 * A view will not actually take focus if {@link AccessibilityManager#isEnabled()} 8297 * returns false or the view is no visible or the view already has accessibility 8298 * focus. 8299 * 8300 * See also {@link #focusSearch(int)}, which is what you call to say that you 8301 * have focus, and you want your parent to look for the next one. 8302 * 8303 * @return Whether this view actually took accessibility focus. 8304 * 8305 * @hide 8306 */ 8307 public boolean requestAccessibilityFocus() { 8308 AccessibilityManager manager = AccessibilityManager.getInstance(mContext); 8309 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 8310 return false; 8311 } 8312 if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { 8313 return false; 8314 } 8315 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) == 0) { 8316 mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_FOCUSED; 8317 ViewRootImpl viewRootImpl = getViewRootImpl(); 8318 if (viewRootImpl != null) { 8319 viewRootImpl.setAccessibilityFocus(this, null); 8320 } 8321 invalidate(); 8322 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 8323 return true; 8324 } 8325 return false; 8326 } 8327 8328 /** 8329 * Call this to try to clear accessibility focus of this view. 8330 * 8331 * See also {@link #focusSearch(int)}, which is what you call to say that you 8332 * have focus, and you want your parent to look for the next one. 8333 * 8334 * @hide 8335 */ 8336 public void clearAccessibilityFocus() { 8337 clearAccessibilityFocusNoCallbacks(); 8338 // Clear the global reference of accessibility focus if this 8339 // view or any of its descendants had accessibility focus. 8340 ViewRootImpl viewRootImpl = getViewRootImpl(); 8341 if (viewRootImpl != null) { 8342 View focusHost = viewRootImpl.getAccessibilityFocusedHost(); 8343 if (focusHost != null && ViewRootImpl.isViewDescendantOf(focusHost, this)) { 8344 viewRootImpl.setAccessibilityFocus(null, null); 8345 } 8346 } 8347 } 8348 8349 private void sendAccessibilityHoverEvent(int eventType) { 8350 // Since we are not delivering to a client accessibility events from not 8351 // important views (unless the clinet request that) we need to fire the 8352 // event from the deepest view exposed to the client. As a consequence if 8353 // the user crosses a not exposed view the client will see enter and exit 8354 // of the exposed predecessor followed by and enter and exit of that same 8355 // predecessor when entering and exiting the not exposed descendant. This 8356 // is fine since the client has a clear idea which view is hovered at the 8357 // price of a couple more events being sent. This is a simple and 8358 // working solution. 8359 View source = this; 8360 while (true) { 8361 if (source.includeForAccessibility()) { 8362 source.sendAccessibilityEvent(eventType); 8363 return; 8364 } 8365 ViewParent parent = source.getParent(); 8366 if (parent instanceof View) { 8367 source = (View) parent; 8368 } else { 8369 return; 8370 } 8371 } 8372 } 8373 8374 /** 8375 * Clears accessibility focus without calling any callback methods 8376 * normally invoked in {@link #clearAccessibilityFocus()}. This method 8377 * is used for clearing accessibility focus when giving this focus to 8378 * another view. 8379 */ 8380 void clearAccessibilityFocusNoCallbacks() { 8381 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { 8382 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; 8383 invalidate(); 8384 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 8385 } 8386 } 8387 8388 /** 8389 * Call this to try to give focus to a specific view or to one of its 8390 * descendants. 8391 * 8392 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 8393 * false), or if it is focusable and it is not focusable in touch mode 8394 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 8395 * 8396 * See also {@link #focusSearch(int)}, which is what you call to say that you 8397 * have focus, and you want your parent to look for the next one. 8398 * 8399 * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments 8400 * {@link #FOCUS_DOWN} and <code>null</code>. 8401 * 8402 * @return Whether this view or one of its descendants actually took focus. 8403 */ 8404 public final boolean requestFocus() { 8405 return requestFocus(View.FOCUS_DOWN); 8406 } 8407 8408 /** 8409 * Call this to try to give focus to a specific view or to one of its 8410 * descendants and give it a hint about what direction focus is heading. 8411 * 8412 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 8413 * false), or if it is focusable and it is not focusable in touch mode 8414 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 8415 * 8416 * See also {@link #focusSearch(int)}, which is what you call to say that you 8417 * have focus, and you want your parent to look for the next one. 8418 * 8419 * This is equivalent to calling {@link #requestFocus(int, Rect)} with 8420 * <code>null</code> set for the previously focused rectangle. 8421 * 8422 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 8423 * @return Whether this view or one of its descendants actually took focus. 8424 */ 8425 public final boolean requestFocus(int direction) { 8426 return requestFocus(direction, null); 8427 } 8428 8429 /** 8430 * Call this to try to give focus to a specific view or to one of its descendants 8431 * and give it hints about the direction and a specific rectangle that the focus 8432 * is coming from. The rectangle can help give larger views a finer grained hint 8433 * about where focus is coming from, and therefore, where to show selection, or 8434 * forward focus change internally. 8435 * 8436 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 8437 * false), or if it is focusable and it is not focusable in touch mode 8438 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 8439 * 8440 * A View will not take focus if it is not visible. 8441 * 8442 * A View will not take focus if one of its parents has 8443 * {@link android.view.ViewGroup#getDescendantFocusability()} equal to 8444 * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. 8445 * 8446 * See also {@link #focusSearch(int)}, which is what you call to say that you 8447 * have focus, and you want your parent to look for the next one. 8448 * 8449 * You may wish to override this method if your custom {@link View} has an internal 8450 * {@link View} that it wishes to forward the request to. 8451 * 8452 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 8453 * @param previouslyFocusedRect The rectangle (in this View's coordinate system) 8454 * to give a finer grained hint about where focus is coming from. May be null 8455 * if there is no hint. 8456 * @return Whether this view or one of its descendants actually took focus. 8457 */ 8458 public boolean requestFocus(int direction, Rect previouslyFocusedRect) { 8459 return requestFocusNoSearch(direction, previouslyFocusedRect); 8460 } 8461 8462 private boolean requestFocusNoSearch(int direction, Rect previouslyFocusedRect) { 8463 // need to be focusable 8464 if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || 8465 (mViewFlags & VISIBILITY_MASK) != VISIBLE) { 8466 return false; 8467 } 8468 8469 // need to be focusable in touch mode if in touch mode 8470 if (isInTouchMode() && 8471 (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { 8472 return false; 8473 } 8474 8475 // need to not have any parents blocking us 8476 if (hasAncestorThatBlocksDescendantFocus()) { 8477 return false; 8478 } 8479 8480 handleFocusGainInternal(direction, previouslyFocusedRect); 8481 return true; 8482 } 8483 8484 /** 8485 * Call this to try to give focus to a specific view or to one of its descendants. This is a 8486 * special variant of {@link #requestFocus() } that will allow views that are not focusable in 8487 * touch mode to request focus when they are touched. 8488 * 8489 * @return Whether this view or one of its descendants actually took focus. 8490 * 8491 * @see #isInTouchMode() 8492 * 8493 */ 8494 public final boolean requestFocusFromTouch() { 8495 // Leave touch mode if we need to 8496 if (isInTouchMode()) { 8497 ViewRootImpl viewRoot = getViewRootImpl(); 8498 if (viewRoot != null) { 8499 viewRoot.ensureTouchMode(false); 8500 } 8501 } 8502 return requestFocus(View.FOCUS_DOWN); 8503 } 8504 8505 /** 8506 * @return Whether any ancestor of this view blocks descendant focus. 8507 */ 8508 private boolean hasAncestorThatBlocksDescendantFocus() { 8509 final boolean focusableInTouchMode = isFocusableInTouchMode(); 8510 ViewParent ancestor = mParent; 8511 while (ancestor instanceof ViewGroup) { 8512 final ViewGroup vgAncestor = (ViewGroup) ancestor; 8513 if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS 8514 || (!focusableInTouchMode && vgAncestor.shouldBlockFocusForTouchscreen())) { 8515 return true; 8516 } else { 8517 ancestor = vgAncestor.getParent(); 8518 } 8519 } 8520 return false; 8521 } 8522 8523 /** 8524 * Gets the mode for determining whether this View is important for accessibility 8525 * which is if it fires accessibility events and if it is reported to 8526 * accessibility services that query the screen. 8527 * 8528 * @return The mode for determining whether a View is important for accessibility. 8529 * 8530 * @attr ref android.R.styleable#View_importantForAccessibility 8531 * 8532 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 8533 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 8534 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 8535 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 8536 */ 8537 @ViewDebug.ExportedProperty(category = "accessibility", mapping = { 8538 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"), 8539 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"), 8540 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no"), 8541 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, 8542 to = "noHideDescendants") 8543 }) 8544 public int getImportantForAccessibility() { 8545 return (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 8546 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 8547 } 8548 8549 /** 8550 * Sets the live region mode for this view. This indicates to accessibility 8551 * services whether they should automatically notify the user about changes 8552 * to the view's content description or text, or to the content descriptions 8553 * or text of the view's children (where applicable). 8554 * <p> 8555 * For example, in a login screen with a TextView that displays an "incorrect 8556 * password" notification, that view should be marked as a live region with 8557 * mode {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 8558 * <p> 8559 * To disable change notifications for this view, use 8560 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. This is the default live region 8561 * mode for most views. 8562 * <p> 8563 * To indicate that the user should be notified of changes, use 8564 * {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 8565 * <p> 8566 * If the view's changes should interrupt ongoing speech and notify the user 8567 * immediately, use {@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE}. 8568 * 8569 * @param mode The live region mode for this view, one of: 8570 * <ul> 8571 * <li>{@link #ACCESSIBILITY_LIVE_REGION_NONE} 8572 * <li>{@link #ACCESSIBILITY_LIVE_REGION_POLITE} 8573 * <li>{@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE} 8574 * </ul> 8575 * @attr ref android.R.styleable#View_accessibilityLiveRegion 8576 */ 8577 public void setAccessibilityLiveRegion(int mode) { 8578 if (mode != getAccessibilityLiveRegion()) { 8579 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 8580 mPrivateFlags2 |= (mode << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT) 8581 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 8582 notifyViewAccessibilityStateChangedIfNeeded( 8583 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 8584 } 8585 } 8586 8587 /** 8588 * Gets the live region mode for this View. 8589 * 8590 * @return The live region mode for the view. 8591 * 8592 * @attr ref android.R.styleable#View_accessibilityLiveRegion 8593 * 8594 * @see #setAccessibilityLiveRegion(int) 8595 */ 8596 public int getAccessibilityLiveRegion() { 8597 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK) 8598 >> PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 8599 } 8600 8601 /** 8602 * Sets how to determine whether this view is important for accessibility 8603 * which is if it fires accessibility events and if it is reported to 8604 * accessibility services that query the screen. 8605 * 8606 * @param mode How to determine whether this view is important for accessibility. 8607 * 8608 * @attr ref android.R.styleable#View_importantForAccessibility 8609 * 8610 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 8611 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 8612 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 8613 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 8614 */ 8615 public void setImportantForAccessibility(int mode) { 8616 final int oldMode = getImportantForAccessibility(); 8617 if (mode != oldMode) { 8618 // If we're moving between AUTO and another state, we might not need 8619 // to send a subtree changed notification. We'll store the computed 8620 // importance, since we'll need to check it later to make sure. 8621 final boolean maySkipNotify = oldMode == IMPORTANT_FOR_ACCESSIBILITY_AUTO 8622 || mode == IMPORTANT_FOR_ACCESSIBILITY_AUTO; 8623 final boolean oldIncludeForAccessibility = maySkipNotify && includeForAccessibility(); 8624 mPrivateFlags2 &= ~PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 8625 mPrivateFlags2 |= (mode << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT) 8626 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 8627 if (!maySkipNotify || oldIncludeForAccessibility != includeForAccessibility()) { 8628 notifySubtreeAccessibilityStateChangedIfNeeded(); 8629 } else { 8630 notifyViewAccessibilityStateChangedIfNeeded( 8631 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 8632 } 8633 } 8634 } 8635 8636 /** 8637 * Computes whether this view should be exposed for accessibility. In 8638 * general, views that are interactive or provide information are exposed 8639 * while views that serve only as containers are hidden. 8640 * <p> 8641 * If an ancestor of this view has importance 8642 * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, this method 8643 * returns <code>false</code>. 8644 * <p> 8645 * Otherwise, the value is computed according to the view's 8646 * {@link #getImportantForAccessibility()} value: 8647 * <ol> 8648 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_NO} or 8649 * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, return <code>false 8650 * </code> 8651 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_YES}, return <code>true</code> 8652 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_AUTO}, return <code>true</code> if 8653 * view satisfies any of the following: 8654 * <ul> 8655 * <li>Is actionable, e.g. {@link #isClickable()}, 8656 * {@link #isLongClickable()}, or {@link #isFocusable()} 8657 * <li>Has an {@link AccessibilityDelegate} 8658 * <li>Has an interaction listener, e.g. {@link OnTouchListener}, 8659 * {@link OnKeyListener}, etc. 8660 * <li>Is an accessibility live region, e.g. 8661 * {@link #getAccessibilityLiveRegion()} is not 8662 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. 8663 * </ul> 8664 * </ol> 8665 * 8666 * @return Whether the view is exposed for accessibility. 8667 * @see #setImportantForAccessibility(int) 8668 * @see #getImportantForAccessibility() 8669 */ 8670 public boolean isImportantForAccessibility() { 8671 final int mode = (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 8672 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 8673 if (mode == IMPORTANT_FOR_ACCESSIBILITY_NO 8674 || mode == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 8675 return false; 8676 } 8677 8678 // Check parent mode to ensure we're not hidden. 8679 ViewParent parent = mParent; 8680 while (parent instanceof View) { 8681 if (((View) parent).getImportantForAccessibility() 8682 == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 8683 return false; 8684 } 8685 parent = parent.getParent(); 8686 } 8687 8688 return mode == IMPORTANT_FOR_ACCESSIBILITY_YES || isActionableForAccessibility() 8689 || hasListenersForAccessibility() || getAccessibilityNodeProvider() != null 8690 || getAccessibilityLiveRegion() != ACCESSIBILITY_LIVE_REGION_NONE; 8691 } 8692 8693 /** 8694 * Gets the parent for accessibility purposes. Note that the parent for 8695 * accessibility is not necessary the immediate parent. It is the first 8696 * predecessor that is important for accessibility. 8697 * 8698 * @return The parent for accessibility purposes. 8699 */ 8700 public ViewParent getParentForAccessibility() { 8701 if (mParent instanceof View) { 8702 View parentView = (View) mParent; 8703 if (parentView.includeForAccessibility()) { 8704 return mParent; 8705 } else { 8706 return mParent.getParentForAccessibility(); 8707 } 8708 } 8709 return null; 8710 } 8711 8712 /** 8713 * Adds the children of a given View for accessibility. Since some Views are 8714 * not important for accessibility the children for accessibility are not 8715 * necessarily direct children of the view, rather they are the first level of 8716 * descendants important for accessibility. 8717 * 8718 * @param children The list of children for accessibility. 8719 */ 8720 public void addChildrenForAccessibility(ArrayList<View> children) { 8721 8722 } 8723 8724 /** 8725 * Whether to regard this view for accessibility. A view is regarded for 8726 * accessibility if it is important for accessibility or the querying 8727 * accessibility service has explicitly requested that view not 8728 * important for accessibility are regarded. 8729 * 8730 * @return Whether to regard the view for accessibility. 8731 * 8732 * @hide 8733 */ 8734 public boolean includeForAccessibility() { 8735 if (mAttachInfo != null) { 8736 return (mAttachInfo.mAccessibilityFetchFlags 8737 & AccessibilityNodeInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0 8738 || isImportantForAccessibility(); 8739 } 8740 return false; 8741 } 8742 8743 /** 8744 * Returns whether the View is considered actionable from 8745 * accessibility perspective. Such view are important for 8746 * accessibility. 8747 * 8748 * @return True if the view is actionable for accessibility. 8749 * 8750 * @hide 8751 */ 8752 public boolean isActionableForAccessibility() { 8753 return (isClickable() || isLongClickable() || isFocusable()); 8754 } 8755 8756 /** 8757 * Returns whether the View has registered callbacks which makes it 8758 * important for accessibility. 8759 * 8760 * @return True if the view is actionable for accessibility. 8761 */ 8762 private boolean hasListenersForAccessibility() { 8763 ListenerInfo info = getListenerInfo(); 8764 return mTouchDelegate != null || info.mOnKeyListener != null 8765 || info.mOnTouchListener != null || info.mOnGenericMotionListener != null 8766 || info.mOnHoverListener != null || info.mOnDragListener != null; 8767 } 8768 8769 /** 8770 * Notifies that the accessibility state of this view changed. The change 8771 * is local to this view and does not represent structural changes such 8772 * as children and parent. For example, the view became focusable. The 8773 * notification is at at most once every 8774 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 8775 * to avoid unnecessary load to the system. Also once a view has a pending 8776 * notification this method is a NOP until the notification has been sent. 8777 * 8778 * @hide 8779 */ 8780 public void notifyViewAccessibilityStateChangedIfNeeded(int changeType) { 8781 if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) { 8782 return; 8783 } 8784 if (mSendViewStateChangedAccessibilityEvent == null) { 8785 mSendViewStateChangedAccessibilityEvent = 8786 new SendViewStateChangedAccessibilityEvent(); 8787 } 8788 mSendViewStateChangedAccessibilityEvent.runOrPost(changeType); 8789 } 8790 8791 /** 8792 * Notifies that the accessibility state of this view changed. The change 8793 * is *not* local to this view and does represent structural changes such 8794 * as children and parent. For example, the view size changed. The 8795 * notification is at at most once every 8796 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 8797 * to avoid unnecessary load to the system. Also once a view has a pending 8798 * notification this method is a NOP until the notification has been sent. 8799 * 8800 * @hide 8801 */ 8802 public void notifySubtreeAccessibilityStateChangedIfNeeded() { 8803 if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) { 8804 return; 8805 } 8806 if ((mPrivateFlags2 & PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED) == 0) { 8807 mPrivateFlags2 |= PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 8808 if (mParent != null) { 8809 try { 8810 mParent.notifySubtreeAccessibilityStateChanged( 8811 this, this, AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); 8812 } catch (AbstractMethodError e) { 8813 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 8814 " does not fully implement ViewParent", e); 8815 } 8816 } 8817 } 8818 } 8819 8820 /** 8821 * Change the visibility of the View without triggering any other changes. This is 8822 * important for transitions, where visibility changes should not adjust focus or 8823 * trigger a new layout. This is only used when the visibility has already been changed 8824 * and we need a transient value during an animation. When the animation completes, 8825 * the original visibility value is always restored. 8826 * 8827 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 8828 * @hide 8829 */ 8830 public void setTransitionVisibility(@Visibility int visibility) { 8831 mViewFlags = (mViewFlags & ~View.VISIBILITY_MASK) | visibility; 8832 } 8833 8834 /** 8835 * Reset the flag indicating the accessibility state of the subtree rooted 8836 * at this view changed. 8837 */ 8838 void resetSubtreeAccessibilityStateChanged() { 8839 mPrivateFlags2 &= ~PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 8840 } 8841 8842 /** 8843 * Report an accessibility action to this view's parents for delegated processing. 8844 * 8845 * <p>Implementations of {@link #performAccessibilityAction(int, Bundle)} may internally 8846 * call this method to delegate an accessibility action to a supporting parent. If the parent 8847 * returns true from its 8848 * {@link ViewParent#onNestedPrePerformAccessibilityAction(View, int, android.os.Bundle)} 8849 * method this method will return true to signify that the action was consumed.</p> 8850 * 8851 * <p>This method is useful for implementing nested scrolling child views. If 8852 * {@link #isNestedScrollingEnabled()} returns true and the action is a scrolling action 8853 * a custom view implementation may invoke this method to allow a parent to consume the 8854 * scroll first. If this method returns true the custom view should skip its own scrolling 8855 * behavior.</p> 8856 * 8857 * @param action Accessibility action to delegate 8858 * @param arguments Optional action arguments 8859 * @return true if the action was consumed by a parent 8860 */ 8861 public boolean dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments) { 8862 for (ViewParent p = getParent(); p != null; p = p.getParent()) { 8863 if (p.onNestedPrePerformAccessibilityAction(this, action, arguments)) { 8864 return true; 8865 } 8866 } 8867 return false; 8868 } 8869 8870 /** 8871 * Performs the specified accessibility action on the view. For 8872 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 8873 * <p> 8874 * If an {@link AccessibilityDelegate} has been specified via calling 8875 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 8876 * {@link AccessibilityDelegate#performAccessibilityAction(View, int, Bundle)} 8877 * is responsible for handling this call. 8878 * </p> 8879 * 8880 * <p>The default implementation will delegate 8881 * {@link AccessibilityNodeInfo#ACTION_SCROLL_BACKWARD} and 8882 * {@link AccessibilityNodeInfo#ACTION_SCROLL_FORWARD} to nested scrolling parents if 8883 * {@link #isNestedScrollingEnabled() nested scrolling is enabled} on this view.</p> 8884 * 8885 * @param action The action to perform. 8886 * @param arguments Optional action arguments. 8887 * @return Whether the action was performed. 8888 */ 8889 public boolean performAccessibilityAction(int action, Bundle arguments) { 8890 if (mAccessibilityDelegate != null) { 8891 return mAccessibilityDelegate.performAccessibilityAction(this, action, arguments); 8892 } else { 8893 return performAccessibilityActionInternal(action, arguments); 8894 } 8895 } 8896 8897 /** 8898 * @see #performAccessibilityAction(int, Bundle) 8899 * 8900 * Note: Called from the default {@link AccessibilityDelegate}. 8901 * 8902 * @hide 8903 */ 8904 public boolean performAccessibilityActionInternal(int action, Bundle arguments) { 8905 if (isNestedScrollingEnabled() 8906 && (action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD 8907 || action == AccessibilityNodeInfo.ACTION_SCROLL_FORWARD 8908 || action == R.id.accessibilityActionScrollUp 8909 || action == R.id.accessibilityActionScrollLeft 8910 || action == R.id.accessibilityActionScrollDown 8911 || action == R.id.accessibilityActionScrollRight)) { 8912 if (dispatchNestedPrePerformAccessibilityAction(action, arguments)) { 8913 return true; 8914 } 8915 } 8916 8917 switch (action) { 8918 case AccessibilityNodeInfo.ACTION_CLICK: { 8919 if (isClickable()) { 8920 performClick(); 8921 return true; 8922 } 8923 } break; 8924 case AccessibilityNodeInfo.ACTION_LONG_CLICK: { 8925 if (isLongClickable()) { 8926 performLongClick(); 8927 return true; 8928 } 8929 } break; 8930 case AccessibilityNodeInfo.ACTION_FOCUS: { 8931 if (!hasFocus()) { 8932 // Get out of touch mode since accessibility 8933 // wants to move focus around. 8934 getViewRootImpl().ensureTouchMode(false); 8935 return requestFocus(); 8936 } 8937 } break; 8938 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 8939 if (hasFocus()) { 8940 clearFocus(); 8941 return !isFocused(); 8942 } 8943 } break; 8944 case AccessibilityNodeInfo.ACTION_SELECT: { 8945 if (!isSelected()) { 8946 setSelected(true); 8947 return isSelected(); 8948 } 8949 } break; 8950 case AccessibilityNodeInfo.ACTION_CLEAR_SELECTION: { 8951 if (isSelected()) { 8952 setSelected(false); 8953 return !isSelected(); 8954 } 8955 } break; 8956 case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: { 8957 if (!isAccessibilityFocused()) { 8958 return requestAccessibilityFocus(); 8959 } 8960 } break; 8961 case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: { 8962 if (isAccessibilityFocused()) { 8963 clearAccessibilityFocus(); 8964 return true; 8965 } 8966 } break; 8967 case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY: { 8968 if (arguments != null) { 8969 final int granularity = arguments.getInt( 8970 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 8971 final boolean extendSelection = arguments.getBoolean( 8972 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 8973 return traverseAtGranularity(granularity, true, extendSelection); 8974 } 8975 } break; 8976 case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: { 8977 if (arguments != null) { 8978 final int granularity = arguments.getInt( 8979 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 8980 final boolean extendSelection = arguments.getBoolean( 8981 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 8982 return traverseAtGranularity(granularity, false, extendSelection); 8983 } 8984 } break; 8985 case AccessibilityNodeInfo.ACTION_SET_SELECTION: { 8986 CharSequence text = getIterableTextForAccessibility(); 8987 if (text == null) { 8988 return false; 8989 } 8990 final int start = (arguments != null) ? arguments.getInt( 8991 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1; 8992 final int end = (arguments != null) ? arguments.getInt( 8993 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1; 8994 // Only cursor position can be specified (selection length == 0) 8995 if ((getAccessibilitySelectionStart() != start 8996 || getAccessibilitySelectionEnd() != end) 8997 && (start == end)) { 8998 setAccessibilitySelection(start, end); 8999 notifyViewAccessibilityStateChangedIfNeeded( 9000 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 9001 return true; 9002 } 9003 } break; 9004 case R.id.accessibilityActionShowOnScreen: { 9005 if (mAttachInfo != null) { 9006 final Rect r = mAttachInfo.mTmpInvalRect; 9007 getDrawingRect(r); 9008 return requestRectangleOnScreen(r, true); 9009 } 9010 } break; 9011 case R.id.accessibilityActionContextClick: { 9012 if (isContextClickable()) { 9013 performContextClick(); 9014 return true; 9015 } 9016 } break; 9017 } 9018 return false; 9019 } 9020 9021 private boolean traverseAtGranularity(int granularity, boolean forward, 9022 boolean extendSelection) { 9023 CharSequence text = getIterableTextForAccessibility(); 9024 if (text == null || text.length() == 0) { 9025 return false; 9026 } 9027 TextSegmentIterator iterator = getIteratorForGranularity(granularity); 9028 if (iterator == null) { 9029 return false; 9030 } 9031 int current = getAccessibilitySelectionEnd(); 9032 if (current == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 9033 current = forward ? 0 : text.length(); 9034 } 9035 final int[] range = forward ? iterator.following(current) : iterator.preceding(current); 9036 if (range == null) { 9037 return false; 9038 } 9039 final int segmentStart = range[0]; 9040 final int segmentEnd = range[1]; 9041 int selectionStart; 9042 int selectionEnd; 9043 if (extendSelection && isAccessibilitySelectionExtendable()) { 9044 selectionStart = getAccessibilitySelectionStart(); 9045 if (selectionStart == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 9046 selectionStart = forward ? segmentStart : segmentEnd; 9047 } 9048 selectionEnd = forward ? segmentEnd : segmentStart; 9049 } else { 9050 selectionStart = selectionEnd= forward ? segmentEnd : segmentStart; 9051 } 9052 setAccessibilitySelection(selectionStart, selectionEnd); 9053 final int action = forward ? AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY 9054 : AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY; 9055 sendViewTextTraversedAtGranularityEvent(action, granularity, segmentStart, segmentEnd); 9056 return true; 9057 } 9058 9059 /** 9060 * Gets the text reported for accessibility purposes. 9061 * 9062 * @return The accessibility text. 9063 * 9064 * @hide 9065 */ 9066 public CharSequence getIterableTextForAccessibility() { 9067 return getContentDescription(); 9068 } 9069 9070 /** 9071 * Gets whether accessibility selection can be extended. 9072 * 9073 * @return If selection is extensible. 9074 * 9075 * @hide 9076 */ 9077 public boolean isAccessibilitySelectionExtendable() { 9078 return false; 9079 } 9080 9081 /** 9082 * @hide 9083 */ 9084 public int getAccessibilitySelectionStart() { 9085 return mAccessibilityCursorPosition; 9086 } 9087 9088 /** 9089 * @hide 9090 */ 9091 public int getAccessibilitySelectionEnd() { 9092 return getAccessibilitySelectionStart(); 9093 } 9094 9095 /** 9096 * @hide 9097 */ 9098 public void setAccessibilitySelection(int start, int end) { 9099 if (start == end && end == mAccessibilityCursorPosition) { 9100 return; 9101 } 9102 if (start >= 0 && start == end && end <= getIterableTextForAccessibility().length()) { 9103 mAccessibilityCursorPosition = start; 9104 } else { 9105 mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 9106 } 9107 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED); 9108 } 9109 9110 private void sendViewTextTraversedAtGranularityEvent(int action, int granularity, 9111 int fromIndex, int toIndex) { 9112 if (mParent == null) { 9113 return; 9114 } 9115 AccessibilityEvent event = AccessibilityEvent.obtain( 9116 AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY); 9117 onInitializeAccessibilityEvent(event); 9118 onPopulateAccessibilityEvent(event); 9119 event.setFromIndex(fromIndex); 9120 event.setToIndex(toIndex); 9121 event.setAction(action); 9122 event.setMovementGranularity(granularity); 9123 mParent.requestSendAccessibilityEvent(this, event); 9124 } 9125 9126 /** 9127 * @hide 9128 */ 9129 public TextSegmentIterator getIteratorForGranularity(int granularity) { 9130 switch (granularity) { 9131 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER: { 9132 CharSequence text = getIterableTextForAccessibility(); 9133 if (text != null && text.length() > 0) { 9134 CharacterTextSegmentIterator iterator = 9135 CharacterTextSegmentIterator.getInstance( 9136 mContext.getResources().getConfiguration().locale); 9137 iterator.initialize(text.toString()); 9138 return iterator; 9139 } 9140 } break; 9141 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD: { 9142 CharSequence text = getIterableTextForAccessibility(); 9143 if (text != null && text.length() > 0) { 9144 WordTextSegmentIterator iterator = 9145 WordTextSegmentIterator.getInstance( 9146 mContext.getResources().getConfiguration().locale); 9147 iterator.initialize(text.toString()); 9148 return iterator; 9149 } 9150 } break; 9151 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH: { 9152 CharSequence text = getIterableTextForAccessibility(); 9153 if (text != null && text.length() > 0) { 9154 ParagraphTextSegmentIterator iterator = 9155 ParagraphTextSegmentIterator.getInstance(); 9156 iterator.initialize(text.toString()); 9157 return iterator; 9158 } 9159 } break; 9160 } 9161 return null; 9162 } 9163 9164 /** 9165 * @hide 9166 */ 9167 public void dispatchStartTemporaryDetach() { 9168 onStartTemporaryDetach(); 9169 } 9170 9171 /** 9172 * This is called when a container is going to temporarily detach a child, with 9173 * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. 9174 * It will either be followed by {@link #onFinishTemporaryDetach()} or 9175 * {@link #onDetachedFromWindow()} when the container is done. 9176 */ 9177 public void onStartTemporaryDetach() { 9178 removeUnsetPressCallback(); 9179 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 9180 } 9181 9182 /** 9183 * @hide 9184 */ 9185 public void dispatchFinishTemporaryDetach() { 9186 onFinishTemporaryDetach(); 9187 } 9188 9189 /** 9190 * Called after {@link #onStartTemporaryDetach} when the container is done 9191 * changing the view. 9192 */ 9193 public void onFinishTemporaryDetach() { 9194 } 9195 9196 /** 9197 * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} 9198 * for this view's window. Returns null if the view is not currently attached 9199 * to the window. Normally you will not need to use this directly, but 9200 * just use the standard high-level event callbacks like 9201 * {@link #onKeyDown(int, KeyEvent)}. 9202 */ 9203 public KeyEvent.DispatcherState getKeyDispatcherState() { 9204 return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; 9205 } 9206 9207 /** 9208 * Dispatch a key event before it is processed by any input method 9209 * associated with the view hierarchy. This can be used to intercept 9210 * key events in special situations before the IME consumes them; a 9211 * typical example would be handling the BACK key to update the application's 9212 * UI instead of allowing the IME to see it and close itself. 9213 * 9214 * @param event The key event to be dispatched. 9215 * @return True if the event was handled, false otherwise. 9216 */ 9217 public boolean dispatchKeyEventPreIme(KeyEvent event) { 9218 return onKeyPreIme(event.getKeyCode(), event); 9219 } 9220 9221 /** 9222 * Dispatch a key event to the next view on the focus path. This path runs 9223 * from the top of the view tree down to the currently focused view. If this 9224 * view has focus, it will dispatch to itself. Otherwise it will dispatch 9225 * the next node down the focus path. This method also fires any key 9226 * listeners. 9227 * 9228 * @param event The key event to be dispatched. 9229 * @return True if the event was handled, false otherwise. 9230 */ 9231 public boolean dispatchKeyEvent(KeyEvent event) { 9232 if (mInputEventConsistencyVerifier != null) { 9233 mInputEventConsistencyVerifier.onKeyEvent(event, 0); 9234 } 9235 9236 // Give any attached key listener a first crack at the event. 9237 //noinspection SimplifiableIfStatement 9238 ListenerInfo li = mListenerInfo; 9239 if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 9240 && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { 9241 return true; 9242 } 9243 9244 if (event.dispatch(this, mAttachInfo != null 9245 ? mAttachInfo.mKeyDispatchState : null, this)) { 9246 return true; 9247 } 9248 9249 if (mInputEventConsistencyVerifier != null) { 9250 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9251 } 9252 return false; 9253 } 9254 9255 /** 9256 * Dispatches a key shortcut event. 9257 * 9258 * @param event The key event to be dispatched. 9259 * @return True if the event was handled by the view, false otherwise. 9260 */ 9261 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 9262 return onKeyShortcut(event.getKeyCode(), event); 9263 } 9264 9265 /** 9266 * Pass the touch screen motion event down to the target view, or this 9267 * view if it is the target. 9268 * 9269 * @param event The motion event to be dispatched. 9270 * @return True if the event was handled by the view, false otherwise. 9271 */ 9272 public boolean dispatchTouchEvent(MotionEvent event) { 9273 // If the event should be handled by accessibility focus first. 9274 if (event.isTargetAccessibilityFocus()) { 9275 // We don't have focus or no virtual descendant has it, do not handle the event. 9276 if (!isAccessibilityFocusedViewOrHost()) { 9277 return false; 9278 } 9279 // We have focus and got the event, then use normal event dispatch. 9280 event.setTargetAccessibilityFocus(false); 9281 } 9282 9283 boolean result = false; 9284 9285 if (mInputEventConsistencyVerifier != null) { 9286 mInputEventConsistencyVerifier.onTouchEvent(event, 0); 9287 } 9288 9289 final int actionMasked = event.getActionMasked(); 9290 if (actionMasked == MotionEvent.ACTION_DOWN) { 9291 // Defensive cleanup for new gesture 9292 stopNestedScroll(); 9293 } 9294 9295 if (onFilterTouchEventForSecurity(event)) { 9296 //noinspection SimplifiableIfStatement 9297 ListenerInfo li = mListenerInfo; 9298 if (li != null && li.mOnTouchListener != null 9299 && (mViewFlags & ENABLED_MASK) == ENABLED 9300 && li.mOnTouchListener.onTouch(this, event)) { 9301 result = true; 9302 } 9303 9304 if (!result && onTouchEvent(event)) { 9305 result = true; 9306 } 9307 } 9308 9309 if (!result && mInputEventConsistencyVerifier != null) { 9310 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9311 } 9312 9313 // Clean up after nested scrolls if this is the end of a gesture; 9314 // also cancel it if we tried an ACTION_DOWN but we didn't want the rest 9315 // of the gesture. 9316 if (actionMasked == MotionEvent.ACTION_UP || 9317 actionMasked == MotionEvent.ACTION_CANCEL || 9318 (actionMasked == MotionEvent.ACTION_DOWN && !result)) { 9319 stopNestedScroll(); 9320 } 9321 9322 return result; 9323 } 9324 9325 boolean isAccessibilityFocusedViewOrHost() { 9326 return isAccessibilityFocused() || (getViewRootImpl() != null && getViewRootImpl() 9327 .getAccessibilityFocusedHost() == this); 9328 } 9329 9330 /** 9331 * Filter the touch event to apply security policies. 9332 * 9333 * @param event The motion event to be filtered. 9334 * @return True if the event should be dispatched, false if the event should be dropped. 9335 * 9336 * @see #getFilterTouchesWhenObscured 9337 */ 9338 public boolean onFilterTouchEventForSecurity(MotionEvent event) { 9339 //noinspection RedundantIfStatement 9340 if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 9341 && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { 9342 // Window is obscured, drop this touch. 9343 return false; 9344 } 9345 return true; 9346 } 9347 9348 /** 9349 * Pass a trackball motion event down to the focused view. 9350 * 9351 * @param event The motion event to be dispatched. 9352 * @return True if the event was handled by the view, false otherwise. 9353 */ 9354 public boolean dispatchTrackballEvent(MotionEvent event) { 9355 if (mInputEventConsistencyVerifier != null) { 9356 mInputEventConsistencyVerifier.onTrackballEvent(event, 0); 9357 } 9358 9359 return onTrackballEvent(event); 9360 } 9361 9362 /** 9363 * Dispatch a generic motion event. 9364 * <p> 9365 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 9366 * are delivered to the view under the pointer. All other generic motion events are 9367 * delivered to the focused view. Hover events are handled specially and are delivered 9368 * to {@link #onHoverEvent(MotionEvent)}. 9369 * </p> 9370 * 9371 * @param event The motion event to be dispatched. 9372 * @return True if the event was handled by the view, false otherwise. 9373 */ 9374 public boolean dispatchGenericMotionEvent(MotionEvent event) { 9375 if (mInputEventConsistencyVerifier != null) { 9376 mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); 9377 } 9378 9379 final int source = event.getSource(); 9380 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 9381 final int action = event.getAction(); 9382 if (action == MotionEvent.ACTION_HOVER_ENTER 9383 || action == MotionEvent.ACTION_HOVER_MOVE 9384 || action == MotionEvent.ACTION_HOVER_EXIT) { 9385 if (dispatchHoverEvent(event)) { 9386 return true; 9387 } 9388 } else if (dispatchGenericPointerEvent(event)) { 9389 return true; 9390 } 9391 } else if (dispatchGenericFocusedEvent(event)) { 9392 return true; 9393 } 9394 9395 if (dispatchGenericMotionEventInternal(event)) { 9396 return true; 9397 } 9398 9399 if (mInputEventConsistencyVerifier != null) { 9400 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9401 } 9402 return false; 9403 } 9404 9405 private boolean dispatchGenericMotionEventInternal(MotionEvent event) { 9406 //noinspection SimplifiableIfStatement 9407 ListenerInfo li = mListenerInfo; 9408 if (li != null && li.mOnGenericMotionListener != null 9409 && (mViewFlags & ENABLED_MASK) == ENABLED 9410 && li.mOnGenericMotionListener.onGenericMotion(this, event)) { 9411 return true; 9412 } 9413 9414 if (onGenericMotionEvent(event)) { 9415 return true; 9416 } 9417 9418 final int actionButton = event.getActionButton(); 9419 switch (event.getActionMasked()) { 9420 case MotionEvent.ACTION_BUTTON_PRESS: 9421 if (isContextClickable() && !mInContextButtonPress && !mHasPerformedLongPress 9422 && (actionButton == MotionEvent.BUTTON_STYLUS_PRIMARY 9423 || actionButton == MotionEvent.BUTTON_SECONDARY)) { 9424 if (performContextClick()) { 9425 mInContextButtonPress = true; 9426 setPressed(true, event.getX(), event.getY()); 9427 removeTapCallback(); 9428 removeLongPressCallback(); 9429 return true; 9430 } 9431 } 9432 break; 9433 9434 case MotionEvent.ACTION_BUTTON_RELEASE: 9435 if (mInContextButtonPress && (actionButton == MotionEvent.BUTTON_STYLUS_PRIMARY 9436 || actionButton == MotionEvent.BUTTON_SECONDARY)) { 9437 mInContextButtonPress = false; 9438 mIgnoreNextUpEvent = true; 9439 } 9440 break; 9441 } 9442 9443 if (mInputEventConsistencyVerifier != null) { 9444 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9445 } 9446 return false; 9447 } 9448 9449 /** 9450 * Dispatch a hover event. 9451 * <p> 9452 * Do not call this method directly. 9453 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 9454 * </p> 9455 * 9456 * @param event The motion event to be dispatched. 9457 * @return True if the event was handled by the view, false otherwise. 9458 */ 9459 protected boolean dispatchHoverEvent(MotionEvent event) { 9460 ListenerInfo li = mListenerInfo; 9461 //noinspection SimplifiableIfStatement 9462 if (li != null && li.mOnHoverListener != null 9463 && (mViewFlags & ENABLED_MASK) == ENABLED 9464 && li.mOnHoverListener.onHover(this, event)) { 9465 return true; 9466 } 9467 9468 return onHoverEvent(event); 9469 } 9470 9471 /** 9472 * Returns true if the view has a child to which it has recently sent 9473 * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and 9474 * it does not have a hovered child, then it must be the innermost hovered view. 9475 * @hide 9476 */ 9477 protected boolean hasHoveredChild() { 9478 return false; 9479 } 9480 9481 /** 9482 * Dispatch a generic motion event to the view under the first pointer. 9483 * <p> 9484 * Do not call this method directly. 9485 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 9486 * </p> 9487 * 9488 * @param event The motion event to be dispatched. 9489 * @return True if the event was handled by the view, false otherwise. 9490 */ 9491 protected boolean dispatchGenericPointerEvent(MotionEvent event) { 9492 return false; 9493 } 9494 9495 /** 9496 * Dispatch a generic motion event to the currently focused view. 9497 * <p> 9498 * Do not call this method directly. 9499 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 9500 * </p> 9501 * 9502 * @param event The motion event to be dispatched. 9503 * @return True if the event was handled by the view, false otherwise. 9504 */ 9505 protected boolean dispatchGenericFocusedEvent(MotionEvent event) { 9506 return false; 9507 } 9508 9509 /** 9510 * Dispatch a pointer event. 9511 * <p> 9512 * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all 9513 * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns 9514 * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches 9515 * and should not be expected to handle other pointing device features. 9516 * </p> 9517 * 9518 * @param event The motion event to be dispatched. 9519 * @return True if the event was handled by the view, false otherwise. 9520 * @hide 9521 */ 9522 public final boolean dispatchPointerEvent(MotionEvent event) { 9523 if (event.isTouchEvent()) { 9524 return dispatchTouchEvent(event); 9525 } else { 9526 return dispatchGenericMotionEvent(event); 9527 } 9528 } 9529 9530 /** 9531 * Called when the window containing this view gains or loses window focus. 9532 * ViewGroups should override to route to their children. 9533 * 9534 * @param hasFocus True if the window containing this view now has focus, 9535 * false otherwise. 9536 */ 9537 public void dispatchWindowFocusChanged(boolean hasFocus) { 9538 onWindowFocusChanged(hasFocus); 9539 } 9540 9541 /** 9542 * Called when the window containing this view gains or loses focus. Note 9543 * that this is separate from view focus: to receive key events, both 9544 * your view and its window must have focus. If a window is displayed 9545 * on top of yours that takes input focus, then your own window will lose 9546 * focus but the view focus will remain unchanged. 9547 * 9548 * @param hasWindowFocus True if the window containing this view now has 9549 * focus, false otherwise. 9550 */ 9551 public void onWindowFocusChanged(boolean hasWindowFocus) { 9552 InputMethodManager imm = InputMethodManager.peekInstance(); 9553 if (!hasWindowFocus) { 9554 if (isPressed()) { 9555 setPressed(false); 9556 } 9557 if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 9558 imm.focusOut(this); 9559 } 9560 removeLongPressCallback(); 9561 removeTapCallback(); 9562 onFocusLost(); 9563 } else if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 9564 imm.focusIn(this); 9565 } 9566 refreshDrawableState(); 9567 } 9568 9569 /** 9570 * Returns true if this view is in a window that currently has window focus. 9571 * Note that this is not the same as the view itself having focus. 9572 * 9573 * @return True if this view is in a window that currently has window focus. 9574 */ 9575 public boolean hasWindowFocus() { 9576 return mAttachInfo != null && mAttachInfo.mHasWindowFocus; 9577 } 9578 9579 /** 9580 * Dispatch a view visibility change down the view hierarchy. 9581 * ViewGroups should override to route to their children. 9582 * @param changedView The view whose visibility changed. Could be 'this' or 9583 * an ancestor view. 9584 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 9585 * {@link #INVISIBLE} or {@link #GONE}. 9586 */ 9587 protected void dispatchVisibilityChanged(@NonNull View changedView, 9588 @Visibility int visibility) { 9589 onVisibilityChanged(changedView, visibility); 9590 } 9591 9592 /** 9593 * Called when the visibility of the view or an ancestor of the view has 9594 * changed. 9595 * 9596 * @param changedView The view whose visibility changed. May be 9597 * {@code this} or an ancestor view. 9598 * @param visibility The new visibility, one of {@link #VISIBLE}, 9599 * {@link #INVISIBLE} or {@link #GONE}. 9600 */ 9601 protected void onVisibilityChanged(@NonNull View changedView, @Visibility int visibility) { 9602 final boolean visible = visibility == VISIBLE && getVisibility() == VISIBLE; 9603 if (visible && mAttachInfo != null) { 9604 initialAwakenScrollBars(); 9605 } 9606 9607 final Drawable dr = mBackground; 9608 if (dr != null && visible != dr.isVisible()) { 9609 dr.setVisible(visible, false); 9610 } 9611 final Drawable fg = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 9612 if (fg != null && visible != fg.isVisible()) { 9613 fg.setVisible(visible, false); 9614 } 9615 } 9616 9617 /** 9618 * Dispatch a hint about whether this view is displayed. For instance, when 9619 * a View moves out of the screen, it might receives a display hint indicating 9620 * the view is not displayed. Applications should not <em>rely</em> on this hint 9621 * as there is no guarantee that they will receive one. 9622 * 9623 * @param hint A hint about whether or not this view is displayed: 9624 * {@link #VISIBLE} or {@link #INVISIBLE}. 9625 */ 9626 public void dispatchDisplayHint(@Visibility int hint) { 9627 onDisplayHint(hint); 9628 } 9629 9630 /** 9631 * Gives this view a hint about whether is displayed or not. For instance, when 9632 * a View moves out of the screen, it might receives a display hint indicating 9633 * the view is not displayed. Applications should not <em>rely</em> on this hint 9634 * as there is no guarantee that they will receive one. 9635 * 9636 * @param hint A hint about whether or not this view is displayed: 9637 * {@link #VISIBLE} or {@link #INVISIBLE}. 9638 */ 9639 protected void onDisplayHint(@Visibility int hint) { 9640 } 9641 9642 /** 9643 * Dispatch a window visibility change down the view hierarchy. 9644 * ViewGroups should override to route to their children. 9645 * 9646 * @param visibility The new visibility of the window. 9647 * 9648 * @see #onWindowVisibilityChanged(int) 9649 */ 9650 public void dispatchWindowVisibilityChanged(@Visibility int visibility) { 9651 onWindowVisibilityChanged(visibility); 9652 } 9653 9654 /** 9655 * Called when the window containing has change its visibility 9656 * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note 9657 * that this tells you whether or not your window is being made visible 9658 * to the window manager; this does <em>not</em> tell you whether or not 9659 * your window is obscured by other windows on the screen, even if it 9660 * is itself visible. 9661 * 9662 * @param visibility The new visibility of the window. 9663 */ 9664 protected void onWindowVisibilityChanged(@Visibility int visibility) { 9665 if (visibility == VISIBLE) { 9666 initialAwakenScrollBars(); 9667 } 9668 } 9669 9670 /** 9671 * Returns the current visibility of the window this view is attached to 9672 * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). 9673 * 9674 * @return Returns the current visibility of the view's window. 9675 */ 9676 @Visibility 9677 public int getWindowVisibility() { 9678 return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; 9679 } 9680 9681 /** 9682 * Retrieve the overall visible display size in which the window this view is 9683 * attached to has been positioned in. This takes into account screen 9684 * decorations above the window, for both cases where the window itself 9685 * is being position inside of them or the window is being placed under 9686 * then and covered insets are used for the window to position its content 9687 * inside. In effect, this tells you the available area where content can 9688 * be placed and remain visible to users. 9689 * 9690 * <p>This function requires an IPC back to the window manager to retrieve 9691 * the requested information, so should not be used in performance critical 9692 * code like drawing. 9693 * 9694 * @param outRect Filled in with the visible display frame. If the view 9695 * is not attached to a window, this is simply the raw display size. 9696 */ 9697 public void getWindowVisibleDisplayFrame(Rect outRect) { 9698 if (mAttachInfo != null) { 9699 try { 9700 mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); 9701 } catch (RemoteException e) { 9702 return; 9703 } 9704 // XXX This is really broken, and probably all needs to be done 9705 // in the window manager, and we need to know more about whether 9706 // we want the area behind or in front of the IME. 9707 final Rect insets = mAttachInfo.mVisibleInsets; 9708 outRect.left += insets.left; 9709 outRect.top += insets.top; 9710 outRect.right -= insets.right; 9711 outRect.bottom -= insets.bottom; 9712 return; 9713 } 9714 // The view is not attached to a display so we don't have a context. 9715 // Make a best guess about the display size. 9716 Display d = DisplayManagerGlobal.getInstance().getRealDisplay(Display.DEFAULT_DISPLAY); 9717 d.getRectSize(outRect); 9718 } 9719 9720 /** 9721 * Dispatch a notification about a resource configuration change down 9722 * the view hierarchy. 9723 * ViewGroups should override to route to their children. 9724 * 9725 * @param newConfig The new resource configuration. 9726 * 9727 * @see #onConfigurationChanged(android.content.res.Configuration) 9728 */ 9729 public void dispatchConfigurationChanged(Configuration newConfig) { 9730 onConfigurationChanged(newConfig); 9731 } 9732 9733 /** 9734 * Called when the current configuration of the resources being used 9735 * by the application have changed. You can use this to decide when 9736 * to reload resources that can changed based on orientation and other 9737 * configuration characteristics. You only need to use this if you are 9738 * not relying on the normal {@link android.app.Activity} mechanism of 9739 * recreating the activity instance upon a configuration change. 9740 * 9741 * @param newConfig The new resource configuration. 9742 */ 9743 protected void onConfigurationChanged(Configuration newConfig) { 9744 } 9745 9746 /** 9747 * Private function to aggregate all per-view attributes in to the view 9748 * root. 9749 */ 9750 void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) { 9751 performCollectViewAttributes(attachInfo, visibility); 9752 } 9753 9754 void performCollectViewAttributes(AttachInfo attachInfo, int visibility) { 9755 if ((visibility & VISIBILITY_MASK) == VISIBLE) { 9756 if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { 9757 attachInfo.mKeepScreenOn = true; 9758 } 9759 attachInfo.mSystemUiVisibility |= mSystemUiVisibility; 9760 ListenerInfo li = mListenerInfo; 9761 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 9762 attachInfo.mHasSystemUiListeners = true; 9763 } 9764 } 9765 } 9766 9767 void needGlobalAttributesUpdate(boolean force) { 9768 final AttachInfo ai = mAttachInfo; 9769 if (ai != null && !ai.mRecomputeGlobalAttributes) { 9770 if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) 9771 || ai.mHasSystemUiListeners) { 9772 ai.mRecomputeGlobalAttributes = true; 9773 } 9774 } 9775 } 9776 9777 /** 9778 * Returns whether the device is currently in touch mode. Touch mode is entered 9779 * once the user begins interacting with the device by touch, and affects various 9780 * things like whether focus is always visible to the user. 9781 * 9782 * @return Whether the device is in touch mode. 9783 */ 9784 @ViewDebug.ExportedProperty 9785 public boolean isInTouchMode() { 9786 if (mAttachInfo != null) { 9787 return mAttachInfo.mInTouchMode; 9788 } else { 9789 return ViewRootImpl.isInTouchMode(); 9790 } 9791 } 9792 9793 /** 9794 * Returns the context the view is running in, through which it can 9795 * access the current theme, resources, etc. 9796 * 9797 * @return The view's Context. 9798 */ 9799 @ViewDebug.CapturedViewProperty 9800 public final Context getContext() { 9801 return mContext; 9802 } 9803 9804 /** 9805 * Handle a key event before it is processed by any input method 9806 * associated with the view hierarchy. This can be used to intercept 9807 * key events in special situations before the IME consumes them; a 9808 * typical example would be handling the BACK key to update the application's 9809 * UI instead of allowing the IME to see it and close itself. 9810 * 9811 * @param keyCode The value in event.getKeyCode(). 9812 * @param event Description of the key event. 9813 * @return If you handled the event, return true. If you want to allow the 9814 * event to be handled by the next receiver, return false. 9815 */ 9816 public boolean onKeyPreIme(int keyCode, KeyEvent event) { 9817 return false; 9818 } 9819 9820 /** 9821 * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) 9822 * KeyEvent.Callback.onKeyDown()}: perform press of the view 9823 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} 9824 * is released, if the view is enabled and clickable. 9825 * 9826 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9827 * although some may elect to do so in some situations. Do not rely on this to 9828 * catch software key presses. 9829 * 9830 * @param keyCode A key code that represents the button pressed, from 9831 * {@link android.view.KeyEvent}. 9832 * @param event The KeyEvent object that defines the button action. 9833 */ 9834 public boolean onKeyDown(int keyCode, KeyEvent event) { 9835 boolean result = false; 9836 9837 if (KeyEvent.isConfirmKey(keyCode)) { 9838 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 9839 return true; 9840 } 9841 // Long clickable items don't necessarily have to be clickable 9842 if (((mViewFlags & CLICKABLE) == CLICKABLE || 9843 (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && 9844 (event.getRepeatCount() == 0)) { 9845 setPressed(true); 9846 checkForLongClick(0); 9847 return true; 9848 } 9849 } 9850 return result; 9851 } 9852 9853 /** 9854 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 9855 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 9856 * the event). 9857 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9858 * although some may elect to do so in some situations. Do not rely on this to 9859 * catch software key presses. 9860 */ 9861 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 9862 return false; 9863 } 9864 9865 /** 9866 * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) 9867 * KeyEvent.Callback.onKeyUp()}: perform clicking of the view 9868 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or 9869 * {@link KeyEvent#KEYCODE_ENTER} is released. 9870 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9871 * although some may elect to do so in some situations. Do not rely on this to 9872 * catch software key presses. 9873 * 9874 * @param keyCode A key code that represents the button pressed, from 9875 * {@link android.view.KeyEvent}. 9876 * @param event The KeyEvent object that defines the button action. 9877 */ 9878 public boolean onKeyUp(int keyCode, KeyEvent event) { 9879 if (KeyEvent.isConfirmKey(keyCode)) { 9880 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 9881 return true; 9882 } 9883 if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { 9884 setPressed(false); 9885 9886 if (!mHasPerformedLongPress) { 9887 // This is a tap, so remove the longpress check 9888 removeLongPressCallback(); 9889 return performClick(); 9890 } 9891 } 9892 } 9893 return false; 9894 } 9895 9896 /** 9897 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 9898 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 9899 * the event). 9900 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9901 * although some may elect to do so in some situations. Do not rely on this to 9902 * catch software key presses. 9903 * 9904 * @param keyCode A key code that represents the button pressed, from 9905 * {@link android.view.KeyEvent}. 9906 * @param repeatCount The number of times the action was made. 9907 * @param event The KeyEvent object that defines the button action. 9908 */ 9909 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 9910 return false; 9911 } 9912 9913 /** 9914 * Called on the focused view when a key shortcut event is not handled. 9915 * Override this method to implement local key shortcuts for the View. 9916 * Key shortcuts can also be implemented by setting the 9917 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 9918 * 9919 * @param keyCode The value in event.getKeyCode(). 9920 * @param event Description of the key event. 9921 * @return If you handled the event, return true. If you want to allow the 9922 * event to be handled by the next receiver, return false. 9923 */ 9924 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 9925 return false; 9926 } 9927 9928 /** 9929 * Check whether the called view is a text editor, in which case it 9930 * would make sense to automatically display a soft input window for 9931 * it. Subclasses should override this if they implement 9932 * {@link #onCreateInputConnection(EditorInfo)} to return true if 9933 * a call on that method would return a non-null InputConnection, and 9934 * they are really a first-class editor that the user would normally 9935 * start typing on when the go into a window containing your view. 9936 * 9937 * <p>The default implementation always returns false. This does 9938 * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} 9939 * will not be called or the user can not otherwise perform edits on your 9940 * view; it is just a hint to the system that this is not the primary 9941 * purpose of this view. 9942 * 9943 * @return Returns true if this view is a text editor, else false. 9944 */ 9945 public boolean onCheckIsTextEditor() { 9946 return false; 9947 } 9948 9949 /** 9950 * Create a new InputConnection for an InputMethod to interact 9951 * with the view. The default implementation returns null, since it doesn't 9952 * support input methods. You can override this to implement such support. 9953 * This is only needed for views that take focus and text input. 9954 * 9955 * <p>When implementing this, you probably also want to implement 9956 * {@link #onCheckIsTextEditor()} to indicate you will return a 9957 * non-null InputConnection.</p> 9958 * 9959 * <p>Also, take good care to fill in the {@link android.view.inputmethod.EditorInfo} 9960 * object correctly and in its entirety, so that the connected IME can rely 9961 * on its values. For example, {@link android.view.inputmethod.EditorInfo#initialSelStart} 9962 * and {@link android.view.inputmethod.EditorInfo#initialSelEnd} members 9963 * must be filled in with the correct cursor position for IMEs to work correctly 9964 * with your application.</p> 9965 * 9966 * @param outAttrs Fill in with attribute information about the connection. 9967 */ 9968 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { 9969 return null; 9970 } 9971 9972 /** 9973 * Called by the {@link android.view.inputmethod.InputMethodManager} 9974 * when a view who is not the current 9975 * input connection target is trying to make a call on the manager. The 9976 * default implementation returns false; you can override this to return 9977 * true for certain views if you are performing InputConnection proxying 9978 * to them. 9979 * @param view The View that is making the InputMethodManager call. 9980 * @return Return true to allow the call, false to reject. 9981 */ 9982 public boolean checkInputConnectionProxy(View view) { 9983 return false; 9984 } 9985 9986 /** 9987 * Show the context menu for this view. It is not safe to hold on to the 9988 * menu after returning from this method. 9989 * 9990 * You should normally not overload this method. Overload 9991 * {@link #onCreateContextMenu(ContextMenu)} or define an 9992 * {@link OnCreateContextMenuListener} to add items to the context menu. 9993 * 9994 * @param menu The context menu to populate 9995 */ 9996 public void createContextMenu(ContextMenu menu) { 9997 ContextMenuInfo menuInfo = getContextMenuInfo(); 9998 9999 // Sets the current menu info so all items added to menu will have 10000 // my extra info set. 10001 ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); 10002 10003 onCreateContextMenu(menu); 10004 ListenerInfo li = mListenerInfo; 10005 if (li != null && li.mOnCreateContextMenuListener != null) { 10006 li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); 10007 } 10008 10009 // Clear the extra information so subsequent items that aren't mine don't 10010 // have my extra info. 10011 ((MenuBuilder)menu).setCurrentMenuInfo(null); 10012 10013 if (mParent != null) { 10014 mParent.createContextMenu(menu); 10015 } 10016 } 10017 10018 /** 10019 * Views should implement this if they have extra information to associate 10020 * with the context menu. The return result is supplied as a parameter to 10021 * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} 10022 * callback. 10023 * 10024 * @return Extra information about the item for which the context menu 10025 * should be shown. This information will vary across different 10026 * subclasses of View. 10027 */ 10028 protected ContextMenuInfo getContextMenuInfo() { 10029 return null; 10030 } 10031 10032 /** 10033 * Views should implement this if the view itself is going to add items to 10034 * the context menu. 10035 * 10036 * @param menu the context menu to populate 10037 */ 10038 protected void onCreateContextMenu(ContextMenu menu) { 10039 } 10040 10041 /** 10042 * Implement this method to handle trackball motion events. The 10043 * <em>relative</em> movement of the trackball since the last event 10044 * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and 10045 * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so 10046 * that a movement of 1 corresponds to the user pressing one DPAD key (so 10047 * they will often be fractional values, representing the more fine-grained 10048 * movement information available from a trackball). 10049 * 10050 * @param event The motion event. 10051 * @return True if the event was handled, false otherwise. 10052 */ 10053 public boolean onTrackballEvent(MotionEvent event) { 10054 return false; 10055 } 10056 10057 /** 10058 * Implement this method to handle generic motion events. 10059 * <p> 10060 * Generic motion events describe joystick movements, mouse hovers, track pad 10061 * touches, scroll wheel movements and other input events. The 10062 * {@link MotionEvent#getSource() source} of the motion event specifies 10063 * the class of input that was received. Implementations of this method 10064 * must examine the bits in the source before processing the event. 10065 * The following code example shows how this is done. 10066 * </p><p> 10067 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 10068 * are delivered to the view under the pointer. All other generic motion events are 10069 * delivered to the focused view. 10070 * </p> 10071 * <pre> public boolean onGenericMotionEvent(MotionEvent event) { 10072 * if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) { 10073 * if (event.getAction() == MotionEvent.ACTION_MOVE) { 10074 * // process the joystick movement... 10075 * return true; 10076 * } 10077 * } 10078 * if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) { 10079 * switch (event.getAction()) { 10080 * case MotionEvent.ACTION_HOVER_MOVE: 10081 * // process the mouse hover movement... 10082 * return true; 10083 * case MotionEvent.ACTION_SCROLL: 10084 * // process the scroll wheel movement... 10085 * return true; 10086 * } 10087 * } 10088 * return super.onGenericMotionEvent(event); 10089 * }</pre> 10090 * 10091 * @param event The generic motion event being processed. 10092 * @return True if the event was handled, false otherwise. 10093 */ 10094 public boolean onGenericMotionEvent(MotionEvent event) { 10095 return false; 10096 } 10097 10098 /** 10099 * Implement this method to handle hover events. 10100 * <p> 10101 * This method is called whenever a pointer is hovering into, over, or out of the 10102 * bounds of a view and the view is not currently being touched. 10103 * Hover events are represented as pointer events with action 10104 * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, 10105 * or {@link MotionEvent#ACTION_HOVER_EXIT}. 10106 * </p> 10107 * <ul> 10108 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} 10109 * when the pointer enters the bounds of the view.</li> 10110 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} 10111 * when the pointer has already entered the bounds of the view and has moved.</li> 10112 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} 10113 * when the pointer has exited the bounds of the view or when the pointer is 10114 * about to go down due to a button click, tap, or similar user action that 10115 * causes the view to be touched.</li> 10116 * </ul> 10117 * <p> 10118 * The view should implement this method to return true to indicate that it is 10119 * handling the hover event, such as by changing its drawable state. 10120 * </p><p> 10121 * The default implementation calls {@link #setHovered} to update the hovered state 10122 * of the view when a hover enter or hover exit event is received, if the view 10123 * is enabled and is clickable. The default implementation also sends hover 10124 * accessibility events. 10125 * </p> 10126 * 10127 * @param event The motion event that describes the hover. 10128 * @return True if the view handled the hover event. 10129 * 10130 * @see #isHovered 10131 * @see #setHovered 10132 * @see #onHoverChanged 10133 */ 10134 public boolean onHoverEvent(MotionEvent event) { 10135 // The root view may receive hover (or touch) events that are outside the bounds of 10136 // the window. This code ensures that we only send accessibility events for 10137 // hovers that are actually within the bounds of the root view. 10138 final int action = event.getActionMasked(); 10139 if (!mSendingHoverAccessibilityEvents) { 10140 if ((action == MotionEvent.ACTION_HOVER_ENTER 10141 || action == MotionEvent.ACTION_HOVER_MOVE) 10142 && !hasHoveredChild() 10143 && pointInView(event.getX(), event.getY())) { 10144 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 10145 mSendingHoverAccessibilityEvents = true; 10146 } 10147 } else { 10148 if (action == MotionEvent.ACTION_HOVER_EXIT 10149 || (action == MotionEvent.ACTION_MOVE 10150 && !pointInView(event.getX(), event.getY()))) { 10151 mSendingHoverAccessibilityEvents = false; 10152 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 10153 } 10154 } 10155 10156 if (isHoverable()) { 10157 switch (action) { 10158 case MotionEvent.ACTION_HOVER_ENTER: 10159 setHovered(true); 10160 break; 10161 case MotionEvent.ACTION_HOVER_EXIT: 10162 setHovered(false); 10163 break; 10164 } 10165 10166 // Dispatch the event to onGenericMotionEvent before returning true. 10167 // This is to provide compatibility with existing applications that 10168 // handled HOVER_MOVE events in onGenericMotionEvent and that would 10169 // break because of the new default handling for hoverable views 10170 // in onHoverEvent. 10171 // Note that onGenericMotionEvent will be called by default when 10172 // onHoverEvent returns false (refer to dispatchGenericMotionEvent). 10173 dispatchGenericMotionEventInternal(event); 10174 // The event was already handled by calling setHovered(), so always 10175 // return true. 10176 return true; 10177 } 10178 10179 return false; 10180 } 10181 10182 /** 10183 * Returns true if the view should handle {@link #onHoverEvent} 10184 * by calling {@link #setHovered} to change its hovered state. 10185 * 10186 * @return True if the view is hoverable. 10187 */ 10188 private boolean isHoverable() { 10189 final int viewFlags = mViewFlags; 10190 if ((viewFlags & ENABLED_MASK) == DISABLED) { 10191 return false; 10192 } 10193 10194 return (viewFlags & CLICKABLE) == CLICKABLE 10195 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE 10196 || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE; 10197 } 10198 10199 /** 10200 * Returns true if the view is currently hovered. 10201 * 10202 * @return True if the view is currently hovered. 10203 * 10204 * @see #setHovered 10205 * @see #onHoverChanged 10206 */ 10207 @ViewDebug.ExportedProperty 10208 public boolean isHovered() { 10209 return (mPrivateFlags & PFLAG_HOVERED) != 0; 10210 } 10211 10212 /** 10213 * Sets whether the view is currently hovered. 10214 * <p> 10215 * Calling this method also changes the drawable state of the view. This 10216 * enables the view to react to hover by using different drawable resources 10217 * to change its appearance. 10218 * </p><p> 10219 * The {@link #onHoverChanged} method is called when the hovered state changes. 10220 * </p> 10221 * 10222 * @param hovered True if the view is hovered. 10223 * 10224 * @see #isHovered 10225 * @see #onHoverChanged 10226 */ 10227 public void setHovered(boolean hovered) { 10228 if (hovered) { 10229 if ((mPrivateFlags & PFLAG_HOVERED) == 0) { 10230 mPrivateFlags |= PFLAG_HOVERED; 10231 refreshDrawableState(); 10232 onHoverChanged(true); 10233 } 10234 } else { 10235 if ((mPrivateFlags & PFLAG_HOVERED) != 0) { 10236 mPrivateFlags &= ~PFLAG_HOVERED; 10237 refreshDrawableState(); 10238 onHoverChanged(false); 10239 } 10240 } 10241 } 10242 10243 /** 10244 * Implement this method to handle hover state changes. 10245 * <p> 10246 * This method is called whenever the hover state changes as a result of a 10247 * call to {@link #setHovered}. 10248 * </p> 10249 * 10250 * @param hovered The current hover state, as returned by {@link #isHovered}. 10251 * 10252 * @see #isHovered 10253 * @see #setHovered 10254 */ 10255 public void onHoverChanged(boolean hovered) { 10256 } 10257 10258 /** 10259 * Implement this method to handle touch screen motion events. 10260 * <p> 10261 * If this method is used to detect click actions, it is recommended that 10262 * the actions be performed by implementing and calling 10263 * {@link #performClick()}. This will ensure consistent system behavior, 10264 * including: 10265 * <ul> 10266 * <li>obeying click sound preferences 10267 * <li>dispatching OnClickListener calls 10268 * <li>handling {@link AccessibilityNodeInfo#ACTION_CLICK ACTION_CLICK} when 10269 * accessibility features are enabled 10270 * </ul> 10271 * 10272 * @param event The motion event. 10273 * @return True if the event was handled, false otherwise. 10274 */ 10275 public boolean onTouchEvent(MotionEvent event) { 10276 final float x = event.getX(); 10277 final float y = event.getY(); 10278 final int viewFlags = mViewFlags; 10279 final int action = event.getAction(); 10280 10281 if ((viewFlags & ENABLED_MASK) == DISABLED) { 10282 if (action == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) { 10283 setPressed(false); 10284 } 10285 // A disabled view that is clickable still consumes the touch 10286 // events, it just doesn't respond to them. 10287 return (((viewFlags & CLICKABLE) == CLICKABLE 10288 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) 10289 || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE); 10290 } 10291 10292 if (mTouchDelegate != null) { 10293 if (mTouchDelegate.onTouchEvent(event)) { 10294 return true; 10295 } 10296 } 10297 10298 if (((viewFlags & CLICKABLE) == CLICKABLE || 10299 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) || 10300 (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) { 10301 switch (action) { 10302 case MotionEvent.ACTION_UP: 10303 boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; 10304 if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { 10305 // take focus if we don't have it already and we should in 10306 // touch mode. 10307 boolean focusTaken = false; 10308 if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { 10309 focusTaken = requestFocus(); 10310 } 10311 10312 if (prepressed) { 10313 // The button is being released before we actually 10314 // showed it as pressed. Make it show the pressed 10315 // state now (before scheduling the click) to ensure 10316 // the user sees it. 10317 setPressed(true, x, y); 10318 } 10319 10320 if (!mHasPerformedLongPress && !mIgnoreNextUpEvent) { 10321 // This is a tap, so remove the longpress check 10322 removeLongPressCallback(); 10323 10324 // Only perform take click actions if we were in the pressed state 10325 if (!focusTaken) { 10326 // Use a Runnable and post this rather than calling 10327 // performClick directly. This lets other visual state 10328 // of the view update before click actions start. 10329 if (mPerformClick == null) { 10330 mPerformClick = new PerformClick(); 10331 } 10332 if (!post(mPerformClick)) { 10333 performClick(); 10334 } 10335 } 10336 } 10337 10338 if (mUnsetPressedState == null) { 10339 mUnsetPressedState = new UnsetPressedState(); 10340 } 10341 10342 if (prepressed) { 10343 postDelayed(mUnsetPressedState, 10344 ViewConfiguration.getPressedStateDuration()); 10345 } else if (!post(mUnsetPressedState)) { 10346 // If the post failed, unpress right now 10347 mUnsetPressedState.run(); 10348 } 10349 10350 removeTapCallback(); 10351 } 10352 mIgnoreNextUpEvent = false; 10353 break; 10354 10355 case MotionEvent.ACTION_DOWN: 10356 mHasPerformedLongPress = false; 10357 10358 if (performButtonActionOnTouchDown(event)) { 10359 break; 10360 } 10361 10362 // Walk up the hierarchy to determine if we're inside a scrolling container. 10363 boolean isInScrollingContainer = isInScrollingContainer(); 10364 10365 // For views inside a scrolling container, delay the pressed feedback for 10366 // a short period in case this is a scroll. 10367 if (isInScrollingContainer) { 10368 mPrivateFlags |= PFLAG_PREPRESSED; 10369 if (mPendingCheckForTap == null) { 10370 mPendingCheckForTap = new CheckForTap(); 10371 } 10372 mPendingCheckForTap.x = event.getX(); 10373 mPendingCheckForTap.y = event.getY(); 10374 postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); 10375 } else { 10376 // Not inside a scrolling container, so show the feedback right away 10377 setPressed(true, x, y); 10378 checkForLongClick(0); 10379 } 10380 break; 10381 10382 case MotionEvent.ACTION_CANCEL: 10383 setPressed(false); 10384 removeTapCallback(); 10385 removeLongPressCallback(); 10386 mInContextButtonPress = false; 10387 mHasPerformedLongPress = false; 10388 mIgnoreNextUpEvent = false; 10389 break; 10390 10391 case MotionEvent.ACTION_MOVE: 10392 drawableHotspotChanged(x, y); 10393 10394 // Be lenient about moving outside of buttons 10395 if (!pointInView(x, y, mTouchSlop)) { 10396 // Outside button 10397 removeTapCallback(); 10398 if ((mPrivateFlags & PFLAG_PRESSED) != 0) { 10399 // Remove any future long press/tap checks 10400 removeLongPressCallback(); 10401 10402 setPressed(false); 10403 } 10404 } 10405 break; 10406 } 10407 10408 return true; 10409 } 10410 10411 return false; 10412 } 10413 10414 /** 10415 * @hide 10416 */ 10417 public boolean isInScrollingContainer() { 10418 ViewParent p = getParent(); 10419 while (p != null && p instanceof ViewGroup) { 10420 if (((ViewGroup) p).shouldDelayChildPressedState()) { 10421 return true; 10422 } 10423 p = p.getParent(); 10424 } 10425 return false; 10426 } 10427 10428 /** 10429 * Remove the longpress detection timer. 10430 */ 10431 private void removeLongPressCallback() { 10432 if (mPendingCheckForLongPress != null) { 10433 removeCallbacks(mPendingCheckForLongPress); 10434 } 10435 } 10436 10437 /** 10438 * Remove the pending click action 10439 */ 10440 private void removePerformClickCallback() { 10441 if (mPerformClick != null) { 10442 removeCallbacks(mPerformClick); 10443 } 10444 } 10445 10446 /** 10447 * Remove the prepress detection timer. 10448 */ 10449 private void removeUnsetPressCallback() { 10450 if ((mPrivateFlags & PFLAG_PRESSED) != 0 && mUnsetPressedState != null) { 10451 setPressed(false); 10452 removeCallbacks(mUnsetPressedState); 10453 } 10454 } 10455 10456 /** 10457 * Remove the tap detection timer. 10458 */ 10459 private void removeTapCallback() { 10460 if (mPendingCheckForTap != null) { 10461 mPrivateFlags &= ~PFLAG_PREPRESSED; 10462 removeCallbacks(mPendingCheckForTap); 10463 } 10464 } 10465 10466 /** 10467 * Cancels a pending long press. Your subclass can use this if you 10468 * want the context menu to come up if the user presses and holds 10469 * at the same place, but you don't want it to come up if they press 10470 * and then move around enough to cause scrolling. 10471 */ 10472 public void cancelLongPress() { 10473 removeLongPressCallback(); 10474 10475 /* 10476 * The prepressed state handled by the tap callback is a display 10477 * construct, but the tap callback will post a long press callback 10478 * less its own timeout. Remove it here. 10479 */ 10480 removeTapCallback(); 10481 } 10482 10483 /** 10484 * Remove the pending callback for sending a 10485 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 10486 */ 10487 private void removeSendViewScrolledAccessibilityEventCallback() { 10488 if (mSendViewScrolledAccessibilityEvent != null) { 10489 removeCallbacks(mSendViewScrolledAccessibilityEvent); 10490 mSendViewScrolledAccessibilityEvent.mIsPending = false; 10491 } 10492 } 10493 10494 /** 10495 * Sets the TouchDelegate for this View. 10496 */ 10497 public void setTouchDelegate(TouchDelegate delegate) { 10498 mTouchDelegate = delegate; 10499 } 10500 10501 /** 10502 * Gets the TouchDelegate for this View. 10503 */ 10504 public TouchDelegate getTouchDelegate() { 10505 return mTouchDelegate; 10506 } 10507 10508 /** 10509 * Request unbuffered dispatch of the given stream of MotionEvents to this View. 10510 * 10511 * Until this View receives a corresponding {@link MotionEvent#ACTION_UP}, ask that the input 10512 * system not batch {@link MotionEvent}s but instead deliver them as soon as they're 10513 * available. This method should only be called for touch events. 10514 * 10515 * <p class="note">This api is not intended for most applications. Buffered dispatch 10516 * provides many of benefits, and just requesting unbuffered dispatch on most MotionEvent 10517 * streams will not improve your input latency. Side effects include: increased latency, 10518 * jittery scrolls and inability to take advantage of system resampling. Talk to your input 10519 * professional to see if {@link #requestUnbufferedDispatch(MotionEvent)} is right for 10520 * you.</p> 10521 */ 10522 public final void requestUnbufferedDispatch(MotionEvent event) { 10523 final int action = event.getAction(); 10524 if (mAttachInfo == null 10525 || action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_MOVE 10526 || !event.isTouchEvent()) { 10527 return; 10528 } 10529 mAttachInfo.mUnbufferedDispatchRequested = true; 10530 } 10531 10532 /** 10533 * Set flags controlling behavior of this view. 10534 * 10535 * @param flags Constant indicating the value which should be set 10536 * @param mask Constant indicating the bit range that should be changed 10537 */ 10538 void setFlags(int flags, int mask) { 10539 final boolean accessibilityEnabled = 10540 AccessibilityManager.getInstance(mContext).isEnabled(); 10541 final boolean oldIncludeForAccessibility = accessibilityEnabled && includeForAccessibility(); 10542 10543 int old = mViewFlags; 10544 mViewFlags = (mViewFlags & ~mask) | (flags & mask); 10545 10546 int changed = mViewFlags ^ old; 10547 if (changed == 0) { 10548 return; 10549 } 10550 int privateFlags = mPrivateFlags; 10551 10552 /* Check if the FOCUSABLE bit has changed */ 10553 if (((changed & FOCUSABLE_MASK) != 0) && 10554 ((privateFlags & PFLAG_HAS_BOUNDS) !=0)) { 10555 if (((old & FOCUSABLE_MASK) == FOCUSABLE) 10556 && ((privateFlags & PFLAG_FOCUSED) != 0)) { 10557 /* Give up focus if we are no longer focusable */ 10558 clearFocus(); 10559 } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) 10560 && ((privateFlags & PFLAG_FOCUSED) == 0)) { 10561 /* 10562 * Tell the view system that we are now available to take focus 10563 * if no one else already has it. 10564 */ 10565 if (mParent != null) mParent.focusableViewAvailable(this); 10566 } 10567 } 10568 10569 final int newVisibility = flags & VISIBILITY_MASK; 10570 if (newVisibility == VISIBLE) { 10571 if ((changed & VISIBILITY_MASK) != 0) { 10572 /* 10573 * If this view is becoming visible, invalidate it in case it changed while 10574 * it was not visible. Marking it drawn ensures that the invalidation will 10575 * go through. 10576 */ 10577 mPrivateFlags |= PFLAG_DRAWN; 10578 invalidate(true); 10579 10580 needGlobalAttributesUpdate(true); 10581 10582 // a view becoming visible is worth notifying the parent 10583 // about in case nothing has focus. even if this specific view 10584 // isn't focusable, it may contain something that is, so let 10585 // the root view try to give this focus if nothing else does. 10586 if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { 10587 mParent.focusableViewAvailable(this); 10588 } 10589 } 10590 } 10591 10592 /* Check if the GONE bit has changed */ 10593 if ((changed & GONE) != 0) { 10594 needGlobalAttributesUpdate(false); 10595 requestLayout(); 10596 10597 if (((mViewFlags & VISIBILITY_MASK) == GONE)) { 10598 if (hasFocus()) clearFocus(); 10599 clearAccessibilityFocus(); 10600 destroyDrawingCache(); 10601 if (mParent instanceof View) { 10602 // GONE views noop invalidation, so invalidate the parent 10603 ((View) mParent).invalidate(true); 10604 } 10605 // Mark the view drawn to ensure that it gets invalidated properly the next 10606 // time it is visible and gets invalidated 10607 mPrivateFlags |= PFLAG_DRAWN; 10608 } 10609 if (mAttachInfo != null) { 10610 mAttachInfo.mViewVisibilityChanged = true; 10611 } 10612 } 10613 10614 /* Check if the VISIBLE bit has changed */ 10615 if ((changed & INVISIBLE) != 0) { 10616 needGlobalAttributesUpdate(false); 10617 /* 10618 * If this view is becoming invisible, set the DRAWN flag so that 10619 * the next invalidate() will not be skipped. 10620 */ 10621 mPrivateFlags |= PFLAG_DRAWN; 10622 10623 if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE)) { 10624 // root view becoming invisible shouldn't clear focus and accessibility focus 10625 if (getRootView() != this) { 10626 if (hasFocus()) clearFocus(); 10627 clearAccessibilityFocus(); 10628 } 10629 } 10630 if (mAttachInfo != null) { 10631 mAttachInfo.mViewVisibilityChanged = true; 10632 } 10633 } 10634 10635 if ((changed & VISIBILITY_MASK) != 0) { 10636 // If the view is invisible, cleanup its display list to free up resources 10637 if (newVisibility != VISIBLE && mAttachInfo != null) { 10638 cleanupDraw(); 10639 } 10640 10641 if (mParent instanceof ViewGroup) { 10642 ((ViewGroup) mParent).onChildVisibilityChanged(this, 10643 (changed & VISIBILITY_MASK), newVisibility); 10644 ((View) mParent).invalidate(true); 10645 } else if (mParent != null) { 10646 mParent.invalidateChild(this, null); 10647 } 10648 10649 if (mAttachInfo != null) { 10650 dispatchVisibilityChanged(this, newVisibility); 10651 notifySubtreeAccessibilityStateChangedIfNeeded(); 10652 } 10653 } 10654 10655 if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { 10656 destroyDrawingCache(); 10657 } 10658 10659 if ((changed & DRAWING_CACHE_ENABLED) != 0) { 10660 destroyDrawingCache(); 10661 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10662 invalidateParentCaches(); 10663 } 10664 10665 if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { 10666 destroyDrawingCache(); 10667 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10668 } 10669 10670 if ((changed & DRAW_MASK) != 0) { 10671 if ((mViewFlags & WILL_NOT_DRAW) != 0) { 10672 if (mBackground != null 10673 || (mForegroundInfo != null && mForegroundInfo.mDrawable != null)) { 10674 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 10675 } else { 10676 mPrivateFlags |= PFLAG_SKIP_DRAW; 10677 } 10678 } else { 10679 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 10680 } 10681 requestLayout(); 10682 invalidate(true); 10683 } 10684 10685 if ((changed & KEEP_SCREEN_ON) != 0) { 10686 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 10687 mParent.recomputeViewAttributes(this); 10688 } 10689 } 10690 10691 if (accessibilityEnabled) { 10692 if ((changed & FOCUSABLE_MASK) != 0 || (changed & VISIBILITY_MASK) != 0 10693 || (changed & CLICKABLE) != 0 || (changed & LONG_CLICKABLE) != 0 10694 || (changed & CONTEXT_CLICKABLE) != 0) { 10695 if (oldIncludeForAccessibility != includeForAccessibility()) { 10696 notifySubtreeAccessibilityStateChangedIfNeeded(); 10697 } else { 10698 notifyViewAccessibilityStateChangedIfNeeded( 10699 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 10700 } 10701 } else if ((changed & ENABLED_MASK) != 0) { 10702 notifyViewAccessibilityStateChangedIfNeeded( 10703 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 10704 } 10705 } 10706 } 10707 10708 /** 10709 * Change the view's z order in the tree, so it's on top of other sibling 10710 * views. This ordering change may affect layout, if the parent container 10711 * uses an order-dependent layout scheme (e.g., LinearLayout). Prior 10712 * to {@link android.os.Build.VERSION_CODES#KITKAT} this 10713 * method should be followed by calls to {@link #requestLayout()} and 10714 * {@link View#invalidate()} on the view's parent to force the parent to redraw 10715 * with the new child ordering. 10716 * 10717 * @see ViewGroup#bringChildToFront(View) 10718 */ 10719 public void bringToFront() { 10720 if (mParent != null) { 10721 mParent.bringChildToFront(this); 10722 } 10723 } 10724 10725 /** 10726 * This is called in response to an internal scroll in this view (i.e., the 10727 * view scrolled its own contents). This is typically as a result of 10728 * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been 10729 * called. 10730 * 10731 * @param l Current horizontal scroll origin. 10732 * @param t Current vertical scroll origin. 10733 * @param oldl Previous horizontal scroll origin. 10734 * @param oldt Previous vertical scroll origin. 10735 */ 10736 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 10737 notifySubtreeAccessibilityStateChangedIfNeeded(); 10738 10739 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 10740 postSendViewScrolledAccessibilityEventCallback(); 10741 } 10742 10743 mBackgroundSizeChanged = true; 10744 if (mForegroundInfo != null) { 10745 mForegroundInfo.mBoundsChanged = true; 10746 } 10747 10748 final AttachInfo ai = mAttachInfo; 10749 if (ai != null) { 10750 ai.mViewScrollChanged = true; 10751 } 10752 10753 if (mListenerInfo != null && mListenerInfo.mOnScrollChangeListener != null) { 10754 mListenerInfo.mOnScrollChangeListener.onScrollChange(this, l, t, oldl, oldt); 10755 } 10756 } 10757 10758 /** 10759 * Interface definition for a callback to be invoked when the scroll 10760 * X or Y positions of a view change. 10761 * <p> 10762 * <b>Note:</b> Some views handle scrolling independently from View and may 10763 * have their own separate listeners for scroll-type events. For example, 10764 * {@link android.widget.ListView ListView} allows clients to register an 10765 * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} 10766 * to listen for changes in list scroll position. 10767 * 10768 * @see #setOnScrollChangeListener(View.OnScrollChangeListener) 10769 */ 10770 public interface OnScrollChangeListener { 10771 /** 10772 * Called when the scroll position of a view changes. 10773 * 10774 * @param v The view whose scroll position has changed. 10775 * @param scrollX Current horizontal scroll origin. 10776 * @param scrollY Current vertical scroll origin. 10777 * @param oldScrollX Previous horizontal scroll origin. 10778 * @param oldScrollY Previous vertical scroll origin. 10779 */ 10780 void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY); 10781 } 10782 10783 /** 10784 * Interface definition for a callback to be invoked when the layout bounds of a view 10785 * changes due to layout processing. 10786 */ 10787 public interface OnLayoutChangeListener { 10788 /** 10789 * Called when the layout bounds of a view changes due to layout processing. 10790 * 10791 * @param v The view whose bounds have changed. 10792 * @param left The new value of the view's left property. 10793 * @param top The new value of the view's top property. 10794 * @param right The new value of the view's right property. 10795 * @param bottom The new value of the view's bottom property. 10796 * @param oldLeft The previous value of the view's left property. 10797 * @param oldTop The previous value of the view's top property. 10798 * @param oldRight The previous value of the view's right property. 10799 * @param oldBottom The previous value of the view's bottom property. 10800 */ 10801 void onLayoutChange(View v, int left, int top, int right, int bottom, 10802 int oldLeft, int oldTop, int oldRight, int oldBottom); 10803 } 10804 10805 /** 10806 * This is called during layout when the size of this view has changed. If 10807 * you were just added to the view hierarchy, you're called with the old 10808 * values of 0. 10809 * 10810 * @param w Current width of this view. 10811 * @param h Current height of this view. 10812 * @param oldw Old width of this view. 10813 * @param oldh Old height of this view. 10814 */ 10815 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 10816 } 10817 10818 /** 10819 * Called by draw to draw the child views. This may be overridden 10820 * by derived classes to gain control just before its children are drawn 10821 * (but after its own view has been drawn). 10822 * @param canvas the canvas on which to draw the view 10823 */ 10824 protected void dispatchDraw(Canvas canvas) { 10825 10826 } 10827 10828 /** 10829 * Gets the parent of this view. Note that the parent is a 10830 * ViewParent and not necessarily a View. 10831 * 10832 * @return Parent of this view. 10833 */ 10834 public final ViewParent getParent() { 10835 return mParent; 10836 } 10837 10838 /** 10839 * Set the horizontal scrolled position of your view. This will cause a call to 10840 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10841 * invalidated. 10842 * @param value the x position to scroll to 10843 */ 10844 public void setScrollX(int value) { 10845 scrollTo(value, mScrollY); 10846 } 10847 10848 /** 10849 * Set the vertical scrolled position of your view. This will cause a call to 10850 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10851 * invalidated. 10852 * @param value the y position to scroll to 10853 */ 10854 public void setScrollY(int value) { 10855 scrollTo(mScrollX, value); 10856 } 10857 10858 /** 10859 * Return the scrolled left position of this view. This is the left edge of 10860 * the displayed part of your view. You do not need to draw any pixels 10861 * farther left, since those are outside of the frame of your view on 10862 * screen. 10863 * 10864 * @return The left edge of the displayed part of your view, in pixels. 10865 */ 10866 public final int getScrollX() { 10867 return mScrollX; 10868 } 10869 10870 /** 10871 * Return the scrolled top position of this view. This is the top edge of 10872 * the displayed part of your view. You do not need to draw any pixels above 10873 * it, since those are outside of the frame of your view on screen. 10874 * 10875 * @return The top edge of the displayed part of your view, in pixels. 10876 */ 10877 public final int getScrollY() { 10878 return mScrollY; 10879 } 10880 10881 /** 10882 * Return the width of the your view. 10883 * 10884 * @return The width of your view, in pixels. 10885 */ 10886 @ViewDebug.ExportedProperty(category = "layout") 10887 public final int getWidth() { 10888 return mRight - mLeft; 10889 } 10890 10891 /** 10892 * Return the height of your view. 10893 * 10894 * @return The height of your view, in pixels. 10895 */ 10896 @ViewDebug.ExportedProperty(category = "layout") 10897 public final int getHeight() { 10898 return mBottom - mTop; 10899 } 10900 10901 /** 10902 * Return the visible drawing bounds of your view. Fills in the output 10903 * rectangle with the values from getScrollX(), getScrollY(), 10904 * getWidth(), and getHeight(). These bounds do not account for any 10905 * transformation properties currently set on the view, such as 10906 * {@link #setScaleX(float)} or {@link #setRotation(float)}. 10907 * 10908 * @param outRect The (scrolled) drawing bounds of the view. 10909 */ 10910 public void getDrawingRect(Rect outRect) { 10911 outRect.left = mScrollX; 10912 outRect.top = mScrollY; 10913 outRect.right = mScrollX + (mRight - mLeft); 10914 outRect.bottom = mScrollY + (mBottom - mTop); 10915 } 10916 10917 /** 10918 * Like {@link #getMeasuredWidthAndState()}, but only returns the 10919 * raw width component (that is the result is masked by 10920 * {@link #MEASURED_SIZE_MASK}). 10921 * 10922 * @return The raw measured width of this view. 10923 */ 10924 public final int getMeasuredWidth() { 10925 return mMeasuredWidth & MEASURED_SIZE_MASK; 10926 } 10927 10928 /** 10929 * Return the full width measurement information for this view as computed 10930 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 10931 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 10932 * This should be used during measurement and layout calculations only. Use 10933 * {@link #getWidth()} to see how wide a view is after layout. 10934 * 10935 * @return The measured width of this view as a bit mask. 10936 */ 10937 @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { 10938 @ViewDebug.FlagToString(mask = MEASURED_STATE_MASK, equals = MEASURED_STATE_TOO_SMALL, 10939 name = "MEASURED_STATE_TOO_SMALL"), 10940 }) 10941 public final int getMeasuredWidthAndState() { 10942 return mMeasuredWidth; 10943 } 10944 10945 /** 10946 * Like {@link #getMeasuredHeightAndState()}, but only returns the 10947 * raw width component (that is the result is masked by 10948 * {@link #MEASURED_SIZE_MASK}). 10949 * 10950 * @return The raw measured height of this view. 10951 */ 10952 public final int getMeasuredHeight() { 10953 return mMeasuredHeight & MEASURED_SIZE_MASK; 10954 } 10955 10956 /** 10957 * Return the full height measurement information for this view as computed 10958 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 10959 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 10960 * This should be used during measurement and layout calculations only. Use 10961 * {@link #getHeight()} to see how wide a view is after layout. 10962 * 10963 * @return The measured width of this view as a bit mask. 10964 */ 10965 @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { 10966 @ViewDebug.FlagToString(mask = MEASURED_STATE_MASK, equals = MEASURED_STATE_TOO_SMALL, 10967 name = "MEASURED_STATE_TOO_SMALL"), 10968 }) 10969 public final int getMeasuredHeightAndState() { 10970 return mMeasuredHeight; 10971 } 10972 10973 /** 10974 * Return only the state bits of {@link #getMeasuredWidthAndState()} 10975 * and {@link #getMeasuredHeightAndState()}, combined into one integer. 10976 * The width component is in the regular bits {@link #MEASURED_STATE_MASK} 10977 * and the height component is at the shifted bits 10978 * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. 10979 */ 10980 public final int getMeasuredState() { 10981 return (mMeasuredWidth&MEASURED_STATE_MASK) 10982 | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) 10983 & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); 10984 } 10985 10986 /** 10987 * The transform matrix of this view, which is calculated based on the current 10988 * rotation, scale, and pivot properties. 10989 * 10990 * @see #getRotation() 10991 * @see #getScaleX() 10992 * @see #getScaleY() 10993 * @see #getPivotX() 10994 * @see #getPivotY() 10995 * @return The current transform matrix for the view 10996 */ 10997 public Matrix getMatrix() { 10998 ensureTransformationInfo(); 10999 final Matrix matrix = mTransformationInfo.mMatrix; 11000 mRenderNode.getMatrix(matrix); 11001 return matrix; 11002 } 11003 11004 /** 11005 * Returns true if the transform matrix is the identity matrix. 11006 * Recomputes the matrix if necessary. 11007 * 11008 * @return True if the transform matrix is the identity matrix, false otherwise. 11009 */ 11010 final boolean hasIdentityMatrix() { 11011 return mRenderNode.hasIdentityMatrix(); 11012 } 11013 11014 void ensureTransformationInfo() { 11015 if (mTransformationInfo == null) { 11016 mTransformationInfo = new TransformationInfo(); 11017 } 11018 } 11019 11020 /** 11021 * Utility method to retrieve the inverse of the current mMatrix property. 11022 * We cache the matrix to avoid recalculating it when transform properties 11023 * have not changed. 11024 * 11025 * @return The inverse of the current matrix of this view. 11026 * @hide 11027 */ 11028 public final Matrix getInverseMatrix() { 11029 ensureTransformationInfo(); 11030 if (mTransformationInfo.mInverseMatrix == null) { 11031 mTransformationInfo.mInverseMatrix = new Matrix(); 11032 } 11033 final Matrix matrix = mTransformationInfo.mInverseMatrix; 11034 mRenderNode.getInverseMatrix(matrix); 11035 return matrix; 11036 } 11037 11038 /** 11039 * Gets the distance along the Z axis from the camera to this view. 11040 * 11041 * @see #setCameraDistance(float) 11042 * 11043 * @return The distance along the Z axis. 11044 */ 11045 public float getCameraDistance() { 11046 final float dpi = mResources.getDisplayMetrics().densityDpi; 11047 return -(mRenderNode.getCameraDistance() * dpi); 11048 } 11049 11050 /** 11051 * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which 11052 * views are drawn) from the camera to this view. The camera's distance 11053 * affects 3D transformations, for instance rotations around the X and Y 11054 * axis. If the rotationX or rotationY properties are changed and this view is 11055 * large (more than half the size of the screen), it is recommended to always 11056 * use a camera distance that's greater than the height (X axis rotation) or 11057 * the width (Y axis rotation) of this view.</p> 11058 * 11059 * <p>The distance of the camera from the view plane can have an affect on the 11060 * perspective distortion of the view when it is rotated around the x or y axis. 11061 * For example, a large distance will result in a large viewing angle, and there 11062 * will not be much perspective distortion of the view as it rotates. A short 11063 * distance may cause much more perspective distortion upon rotation, and can 11064 * also result in some drawing artifacts if the rotated view ends up partially 11065 * behind the camera (which is why the recommendation is to use a distance at 11066 * least as far as the size of the view, if the view is to be rotated.)</p> 11067 * 11068 * <p>The distance is expressed in "depth pixels." The default distance depends 11069 * on the screen density. For instance, on a medium density display, the 11070 * default distance is 1280. On a high density display, the default distance 11071 * is 1920.</p> 11072 * 11073 * <p>If you want to specify a distance that leads to visually consistent 11074 * results across various densities, use the following formula:</p> 11075 * <pre> 11076 * float scale = context.getResources().getDisplayMetrics().density; 11077 * view.setCameraDistance(distance * scale); 11078 * </pre> 11079 * 11080 * <p>The density scale factor of a high density display is 1.5, 11081 * and 1920 = 1280 * 1.5.</p> 11082 * 11083 * @param distance The distance in "depth pixels", if negative the opposite 11084 * value is used 11085 * 11086 * @see #setRotationX(float) 11087 * @see #setRotationY(float) 11088 */ 11089 public void setCameraDistance(float distance) { 11090 final float dpi = mResources.getDisplayMetrics().densityDpi; 11091 11092 invalidateViewProperty(true, false); 11093 mRenderNode.setCameraDistance(-Math.abs(distance) / dpi); 11094 invalidateViewProperty(false, false); 11095 11096 invalidateParentIfNeededAndWasQuickRejected(); 11097 } 11098 11099 /** 11100 * The degrees that the view is rotated around the pivot point. 11101 * 11102 * @see #setRotation(float) 11103 * @see #getPivotX() 11104 * @see #getPivotY() 11105 * 11106 * @return The degrees of rotation. 11107 */ 11108 @ViewDebug.ExportedProperty(category = "drawing") 11109 public float getRotation() { 11110 return mRenderNode.getRotation(); 11111 } 11112 11113 /** 11114 * Sets the degrees that the view is rotated around the pivot point. Increasing values 11115 * result in clockwise rotation. 11116 * 11117 * @param rotation The degrees of rotation. 11118 * 11119 * @see #getRotation() 11120 * @see #getPivotX() 11121 * @see #getPivotY() 11122 * @see #setRotationX(float) 11123 * @see #setRotationY(float) 11124 * 11125 * @attr ref android.R.styleable#View_rotation 11126 */ 11127 public void setRotation(float rotation) { 11128 if (rotation != getRotation()) { 11129 // Double-invalidation is necessary to capture view's old and new areas 11130 invalidateViewProperty(true, false); 11131 mRenderNode.setRotation(rotation); 11132 invalidateViewProperty(false, true); 11133 11134 invalidateParentIfNeededAndWasQuickRejected(); 11135 notifySubtreeAccessibilityStateChangedIfNeeded(); 11136 } 11137 } 11138 11139 /** 11140 * The degrees that the view is rotated around the vertical axis through the pivot point. 11141 * 11142 * @see #getPivotX() 11143 * @see #getPivotY() 11144 * @see #setRotationY(float) 11145 * 11146 * @return The degrees of Y rotation. 11147 */ 11148 @ViewDebug.ExportedProperty(category = "drawing") 11149 public float getRotationY() { 11150 return mRenderNode.getRotationY(); 11151 } 11152 11153 /** 11154 * Sets the degrees that the view is rotated around the vertical axis through the pivot point. 11155 * Increasing values result in counter-clockwise rotation from the viewpoint of looking 11156 * down the y axis. 11157 * 11158 * When rotating large views, it is recommended to adjust the camera distance 11159 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 11160 * 11161 * @param rotationY The degrees of Y rotation. 11162 * 11163 * @see #getRotationY() 11164 * @see #getPivotX() 11165 * @see #getPivotY() 11166 * @see #setRotation(float) 11167 * @see #setRotationX(float) 11168 * @see #setCameraDistance(float) 11169 * 11170 * @attr ref android.R.styleable#View_rotationY 11171 */ 11172 public void setRotationY(float rotationY) { 11173 if (rotationY != getRotationY()) { 11174 invalidateViewProperty(true, false); 11175 mRenderNode.setRotationY(rotationY); 11176 invalidateViewProperty(false, true); 11177 11178 invalidateParentIfNeededAndWasQuickRejected(); 11179 notifySubtreeAccessibilityStateChangedIfNeeded(); 11180 } 11181 } 11182 11183 /** 11184 * The degrees that the view is rotated around the horizontal axis through the pivot point. 11185 * 11186 * @see #getPivotX() 11187 * @see #getPivotY() 11188 * @see #setRotationX(float) 11189 * 11190 * @return The degrees of X rotation. 11191 */ 11192 @ViewDebug.ExportedProperty(category = "drawing") 11193 public float getRotationX() { 11194 return mRenderNode.getRotationX(); 11195 } 11196 11197 /** 11198 * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. 11199 * Increasing values result in clockwise rotation from the viewpoint of looking down the 11200 * x axis. 11201 * 11202 * When rotating large views, it is recommended to adjust the camera distance 11203 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 11204 * 11205 * @param rotationX The degrees of X rotation. 11206 * 11207 * @see #getRotationX() 11208 * @see #getPivotX() 11209 * @see #getPivotY() 11210 * @see #setRotation(float) 11211 * @see #setRotationY(float) 11212 * @see #setCameraDistance(float) 11213 * 11214 * @attr ref android.R.styleable#View_rotationX 11215 */ 11216 public void setRotationX(float rotationX) { 11217 if (rotationX != getRotationX()) { 11218 invalidateViewProperty(true, false); 11219 mRenderNode.setRotationX(rotationX); 11220 invalidateViewProperty(false, true); 11221 11222 invalidateParentIfNeededAndWasQuickRejected(); 11223 notifySubtreeAccessibilityStateChangedIfNeeded(); 11224 } 11225 } 11226 11227 /** 11228 * The amount that the view is scaled in x around the pivot point, as a proportion of 11229 * the view's unscaled width. A value of 1, the default, means that no scaling is applied. 11230 * 11231 * <p>By default, this is 1.0f. 11232 * 11233 * @see #getPivotX() 11234 * @see #getPivotY() 11235 * @return The scaling factor. 11236 */ 11237 @ViewDebug.ExportedProperty(category = "drawing") 11238 public float getScaleX() { 11239 return mRenderNode.getScaleX(); 11240 } 11241 11242 /** 11243 * Sets the amount that the view is scaled in x around the pivot point, as a proportion of 11244 * the view's unscaled width. A value of 1 means that no scaling is applied. 11245 * 11246 * @param scaleX The scaling factor. 11247 * @see #getPivotX() 11248 * @see #getPivotY() 11249 * 11250 * @attr ref android.R.styleable#View_scaleX 11251 */ 11252 public void setScaleX(float scaleX) { 11253 if (scaleX != getScaleX()) { 11254 invalidateViewProperty(true, false); 11255 mRenderNode.setScaleX(scaleX); 11256 invalidateViewProperty(false, true); 11257 11258 invalidateParentIfNeededAndWasQuickRejected(); 11259 notifySubtreeAccessibilityStateChangedIfNeeded(); 11260 } 11261 } 11262 11263 /** 11264 * The amount that the view is scaled in y around the pivot point, as a proportion of 11265 * the view's unscaled height. A value of 1, the default, means that no scaling is applied. 11266 * 11267 * <p>By default, this is 1.0f. 11268 * 11269 * @see #getPivotX() 11270 * @see #getPivotY() 11271 * @return The scaling factor. 11272 */ 11273 @ViewDebug.ExportedProperty(category = "drawing") 11274 public float getScaleY() { 11275 return mRenderNode.getScaleY(); 11276 } 11277 11278 /** 11279 * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of 11280 * the view's unscaled width. A value of 1 means that no scaling is applied. 11281 * 11282 * @param scaleY The scaling factor. 11283 * @see #getPivotX() 11284 * @see #getPivotY() 11285 * 11286 * @attr ref android.R.styleable#View_scaleY 11287 */ 11288 public void setScaleY(float scaleY) { 11289 if (scaleY != getScaleY()) { 11290 invalidateViewProperty(true, false); 11291 mRenderNode.setScaleY(scaleY); 11292 invalidateViewProperty(false, true); 11293 11294 invalidateParentIfNeededAndWasQuickRejected(); 11295 notifySubtreeAccessibilityStateChangedIfNeeded(); 11296 } 11297 } 11298 11299 /** 11300 * The x location of the point around which the view is {@link #setRotation(float) rotated} 11301 * and {@link #setScaleX(float) scaled}. 11302 * 11303 * @see #getRotation() 11304 * @see #getScaleX() 11305 * @see #getScaleY() 11306 * @see #getPivotY() 11307 * @return The x location of the pivot point. 11308 * 11309 * @attr ref android.R.styleable#View_transformPivotX 11310 */ 11311 @ViewDebug.ExportedProperty(category = "drawing") 11312 public float getPivotX() { 11313 return mRenderNode.getPivotX(); 11314 } 11315 11316 /** 11317 * Sets the x location of the point around which the view is 11318 * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. 11319 * By default, the pivot point is centered on the object. 11320 * Setting this property disables this behavior and causes the view to use only the 11321 * explicitly set pivotX and pivotY values. 11322 * 11323 * @param pivotX The x location of the pivot point. 11324 * @see #getRotation() 11325 * @see #getScaleX() 11326 * @see #getScaleY() 11327 * @see #getPivotY() 11328 * 11329 * @attr ref android.R.styleable#View_transformPivotX 11330 */ 11331 public void setPivotX(float pivotX) { 11332 if (!mRenderNode.isPivotExplicitlySet() || pivotX != getPivotX()) { 11333 invalidateViewProperty(true, false); 11334 mRenderNode.setPivotX(pivotX); 11335 invalidateViewProperty(false, true); 11336 11337 invalidateParentIfNeededAndWasQuickRejected(); 11338 } 11339 } 11340 11341 /** 11342 * The y location of the point around which the view is {@link #setRotation(float) rotated} 11343 * and {@link #setScaleY(float) scaled}. 11344 * 11345 * @see #getRotation() 11346 * @see #getScaleX() 11347 * @see #getScaleY() 11348 * @see #getPivotY() 11349 * @return The y location of the pivot point. 11350 * 11351 * @attr ref android.R.styleable#View_transformPivotY 11352 */ 11353 @ViewDebug.ExportedProperty(category = "drawing") 11354 public float getPivotY() { 11355 return mRenderNode.getPivotY(); 11356 } 11357 11358 /** 11359 * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} 11360 * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. 11361 * Setting this property disables this behavior and causes the view to use only the 11362 * explicitly set pivotX and pivotY values. 11363 * 11364 * @param pivotY The y location of the pivot point. 11365 * @see #getRotation() 11366 * @see #getScaleX() 11367 * @see #getScaleY() 11368 * @see #getPivotY() 11369 * 11370 * @attr ref android.R.styleable#View_transformPivotY 11371 */ 11372 public void setPivotY(float pivotY) { 11373 if (!mRenderNode.isPivotExplicitlySet() || pivotY != getPivotY()) { 11374 invalidateViewProperty(true, false); 11375 mRenderNode.setPivotY(pivotY); 11376 invalidateViewProperty(false, true); 11377 11378 invalidateParentIfNeededAndWasQuickRejected(); 11379 } 11380 } 11381 11382 /** 11383 * The opacity of the view. This is a value from 0 to 1, where 0 means the view is 11384 * completely transparent and 1 means the view is completely opaque. 11385 * 11386 * <p>By default this is 1.0f. 11387 * @return The opacity of the view. 11388 */ 11389 @ViewDebug.ExportedProperty(category = "drawing") 11390 public float getAlpha() { 11391 return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; 11392 } 11393 11394 /** 11395 * Returns whether this View has content which overlaps. 11396 * 11397 * <p>This function, intended to be overridden by specific View types, is an optimization when 11398 * alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to 11399 * an offscreen buffer and then composited into place, which can be expensive. If the view has 11400 * no overlapping rendering, the view can draw each primitive with the appropriate alpha value 11401 * directly. An example of overlapping rendering is a TextView with a background image, such as 11402 * a Button. An example of non-overlapping rendering is a TextView with no background, or an 11403 * ImageView with only the foreground image. The default implementation returns true; subclasses 11404 * should override if they have cases which can be optimized.</p> 11405 * 11406 * <p>The current implementation of the saveLayer and saveLayerAlpha methods in {@link Canvas} 11407 * necessitates that a View return true if it uses the methods internally without passing the 11408 * {@link Canvas#CLIP_TO_LAYER_SAVE_FLAG}.</p> 11409 * 11410 * @return true if the content in this view might overlap, false otherwise. 11411 */ 11412 @ViewDebug.ExportedProperty(category = "drawing") 11413 public boolean hasOverlappingRendering() { 11414 return true; 11415 } 11416 11417 /** 11418 * Sets the opacity of the view to a value from 0 to 1, where 0 means the view is 11419 * completely transparent and 1 means the view is completely opaque. 11420 * 11421 * <p class="note"><strong>Note:</strong> setting alpha to a translucent value (0 < alpha < 1) 11422 * can have significant performance implications, especially for large views. It is best to use 11423 * the alpha property sparingly and transiently, as in the case of fading animations.</p> 11424 * 11425 * <p>For a view with a frequently changing alpha, such as during a fading animation, it is 11426 * strongly recommended for performance reasons to either override 11427 * {@link #hasOverlappingRendering()} to return <code>false</code> if appropriate, or setting a 11428 * {@link #setLayerType(int, android.graphics.Paint) layer type} on the view for the duration 11429 * of the animation. On versions {@link android.os.Build.VERSION_CODES#MNC} and below, 11430 * the default path for rendering an unlayered View with alpha could add multiple milliseconds 11431 * of rendering cost, even for simple or small views. Starting with 11432 * {@link android.os.Build.VERSION_CODES#MNC}, {@link #LAYER_TYPE_HARDWARE} is automatically 11433 * applied to the view at the rendering level.</p> 11434 * 11435 * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is 11436 * responsible for applying the opacity itself.</p> 11437 * 11438 * <p>On versions {@link android.os.Build.VERSION_CODES#LOLLIPOP_MR1} and below, note that if 11439 * the view is backed by a {@link #setLayerType(int, android.graphics.Paint) layer} and is 11440 * associated with a {@link #setLayerPaint(android.graphics.Paint) layer paint}, setting an 11441 * alpha value less than 1.0 will supersede the alpha of the layer paint.</p> 11442 * 11443 * <p>Starting with {@link android.os.Build.VERSION_CODES#MNC}, setting a translucent alpha 11444 * value will clip a View to its bounds, unless the View returns <code>false</code> from 11445 * {@link #hasOverlappingRendering}.</p> 11446 * 11447 * @param alpha The opacity of the view. 11448 * 11449 * @see #hasOverlappingRendering() 11450 * @see #setLayerType(int, android.graphics.Paint) 11451 * 11452 * @attr ref android.R.styleable#View_alpha 11453 */ 11454 public void setAlpha(@FloatRange(from=0.0, to=1.0) float alpha) { 11455 ensureTransformationInfo(); 11456 if (mTransformationInfo.mAlpha != alpha) { 11457 mTransformationInfo.mAlpha = alpha; 11458 if (onSetAlpha((int) (alpha * 255))) { 11459 mPrivateFlags |= PFLAG_ALPHA_SET; 11460 // subclass is handling alpha - don't optimize rendering cache invalidation 11461 invalidateParentCaches(); 11462 invalidate(true); 11463 } else { 11464 mPrivateFlags &= ~PFLAG_ALPHA_SET; 11465 invalidateViewProperty(true, false); 11466 mRenderNode.setAlpha(getFinalAlpha()); 11467 notifyViewAccessibilityStateChangedIfNeeded( 11468 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 11469 } 11470 } 11471 } 11472 11473 /** 11474 * Faster version of setAlpha() which performs the same steps except there are 11475 * no calls to invalidate(). The caller of this function should perform proper invalidation 11476 * on the parent and this object. The return value indicates whether the subclass handles 11477 * alpha (the return value for onSetAlpha()). 11478 * 11479 * @param alpha The new value for the alpha property 11480 * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and 11481 * the new value for the alpha property is different from the old value 11482 */ 11483 boolean setAlphaNoInvalidation(float alpha) { 11484 ensureTransformationInfo(); 11485 if (mTransformationInfo.mAlpha != alpha) { 11486 mTransformationInfo.mAlpha = alpha; 11487 boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); 11488 if (subclassHandlesAlpha) { 11489 mPrivateFlags |= PFLAG_ALPHA_SET; 11490 return true; 11491 } else { 11492 mPrivateFlags &= ~PFLAG_ALPHA_SET; 11493 mRenderNode.setAlpha(getFinalAlpha()); 11494 } 11495 } 11496 return false; 11497 } 11498 11499 /** 11500 * This property is hidden and intended only for use by the Fade transition, which 11501 * animates it to produce a visual translucency that does not side-effect (or get 11502 * affected by) the real alpha property. This value is composited with the other 11503 * alpha value (and the AlphaAnimation value, when that is present) to produce 11504 * a final visual translucency result, which is what is passed into the DisplayList. 11505 * 11506 * @hide 11507 */ 11508 public void setTransitionAlpha(float alpha) { 11509 ensureTransformationInfo(); 11510 if (mTransformationInfo.mTransitionAlpha != alpha) { 11511 mTransformationInfo.mTransitionAlpha = alpha; 11512 mPrivateFlags &= ~PFLAG_ALPHA_SET; 11513 invalidateViewProperty(true, false); 11514 mRenderNode.setAlpha(getFinalAlpha()); 11515 } 11516 } 11517 11518 /** 11519 * Calculates the visual alpha of this view, which is a combination of the actual 11520 * alpha value and the transitionAlpha value (if set). 11521 */ 11522 private float getFinalAlpha() { 11523 if (mTransformationInfo != null) { 11524 return mTransformationInfo.mAlpha * mTransformationInfo.mTransitionAlpha; 11525 } 11526 return 1; 11527 } 11528 11529 /** 11530 * This property is hidden and intended only for use by the Fade transition, which 11531 * animates it to produce a visual translucency that does not side-effect (or get 11532 * affected by) the real alpha property. This value is composited with the other 11533 * alpha value (and the AlphaAnimation value, when that is present) to produce 11534 * a final visual translucency result, which is what is passed into the DisplayList. 11535 * 11536 * @hide 11537 */ 11538 @ViewDebug.ExportedProperty(category = "drawing") 11539 public float getTransitionAlpha() { 11540 return mTransformationInfo != null ? mTransformationInfo.mTransitionAlpha : 1; 11541 } 11542 11543 /** 11544 * Top position of this view relative to its parent. 11545 * 11546 * @return The top of this view, in pixels. 11547 */ 11548 @ViewDebug.CapturedViewProperty 11549 public final int getTop() { 11550 return mTop; 11551 } 11552 11553 /** 11554 * Sets the top position of this view relative to its parent. This method is meant to be called 11555 * by the layout system and should not generally be called otherwise, because the property 11556 * may be changed at any time by the layout. 11557 * 11558 * @param top The top of this view, in pixels. 11559 */ 11560 public final void setTop(int top) { 11561 if (top != mTop) { 11562 final boolean matrixIsIdentity = hasIdentityMatrix(); 11563 if (matrixIsIdentity) { 11564 if (mAttachInfo != null) { 11565 int minTop; 11566 int yLoc; 11567 if (top < mTop) { 11568 minTop = top; 11569 yLoc = top - mTop; 11570 } else { 11571 minTop = mTop; 11572 yLoc = 0; 11573 } 11574 invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); 11575 } 11576 } else { 11577 // Double-invalidation is necessary to capture view's old and new areas 11578 invalidate(true); 11579 } 11580 11581 int width = mRight - mLeft; 11582 int oldHeight = mBottom - mTop; 11583 11584 mTop = top; 11585 mRenderNode.setTop(mTop); 11586 11587 sizeChange(width, mBottom - mTop, width, oldHeight); 11588 11589 if (!matrixIsIdentity) { 11590 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11591 invalidate(true); 11592 } 11593 mBackgroundSizeChanged = true; 11594 if (mForegroundInfo != null) { 11595 mForegroundInfo.mBoundsChanged = true; 11596 } 11597 invalidateParentIfNeeded(); 11598 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11599 // View was rejected last time it was drawn by its parent; this may have changed 11600 invalidateParentIfNeeded(); 11601 } 11602 } 11603 } 11604 11605 /** 11606 * Bottom position of this view relative to its parent. 11607 * 11608 * @return The bottom of this view, in pixels. 11609 */ 11610 @ViewDebug.CapturedViewProperty 11611 public final int getBottom() { 11612 return mBottom; 11613 } 11614 11615 /** 11616 * True if this view has changed since the last time being drawn. 11617 * 11618 * @return The dirty state of this view. 11619 */ 11620 public boolean isDirty() { 11621 return (mPrivateFlags & PFLAG_DIRTY_MASK) != 0; 11622 } 11623 11624 /** 11625 * Sets the bottom position of this view relative to its parent. This method is meant to be 11626 * called by the layout system and should not generally be called otherwise, because the 11627 * property may be changed at any time by the layout. 11628 * 11629 * @param bottom The bottom of this view, in pixels. 11630 */ 11631 public final void setBottom(int bottom) { 11632 if (bottom != mBottom) { 11633 final boolean matrixIsIdentity = hasIdentityMatrix(); 11634 if (matrixIsIdentity) { 11635 if (mAttachInfo != null) { 11636 int maxBottom; 11637 if (bottom < mBottom) { 11638 maxBottom = mBottom; 11639 } else { 11640 maxBottom = bottom; 11641 } 11642 invalidate(0, 0, mRight - mLeft, maxBottom - mTop); 11643 } 11644 } else { 11645 // Double-invalidation is necessary to capture view's old and new areas 11646 invalidate(true); 11647 } 11648 11649 int width = mRight - mLeft; 11650 int oldHeight = mBottom - mTop; 11651 11652 mBottom = bottom; 11653 mRenderNode.setBottom(mBottom); 11654 11655 sizeChange(width, mBottom - mTop, width, oldHeight); 11656 11657 if (!matrixIsIdentity) { 11658 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11659 invalidate(true); 11660 } 11661 mBackgroundSizeChanged = true; 11662 if (mForegroundInfo != null) { 11663 mForegroundInfo.mBoundsChanged = true; 11664 } 11665 invalidateParentIfNeeded(); 11666 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11667 // View was rejected last time it was drawn by its parent; this may have changed 11668 invalidateParentIfNeeded(); 11669 } 11670 } 11671 } 11672 11673 /** 11674 * Left position of this view relative to its parent. 11675 * 11676 * @return The left edge of this view, in pixels. 11677 */ 11678 @ViewDebug.CapturedViewProperty 11679 public final int getLeft() { 11680 return mLeft; 11681 } 11682 11683 /** 11684 * Sets the left position of this view relative to its parent. This method is meant to be called 11685 * by the layout system and should not generally be called otherwise, because the property 11686 * may be changed at any time by the layout. 11687 * 11688 * @param left The left of this view, in pixels. 11689 */ 11690 public final void setLeft(int left) { 11691 if (left != mLeft) { 11692 final boolean matrixIsIdentity = hasIdentityMatrix(); 11693 if (matrixIsIdentity) { 11694 if (mAttachInfo != null) { 11695 int minLeft; 11696 int xLoc; 11697 if (left < mLeft) { 11698 minLeft = left; 11699 xLoc = left - mLeft; 11700 } else { 11701 minLeft = mLeft; 11702 xLoc = 0; 11703 } 11704 invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); 11705 } 11706 } else { 11707 // Double-invalidation is necessary to capture view's old and new areas 11708 invalidate(true); 11709 } 11710 11711 int oldWidth = mRight - mLeft; 11712 int height = mBottom - mTop; 11713 11714 mLeft = left; 11715 mRenderNode.setLeft(left); 11716 11717 sizeChange(mRight - mLeft, height, oldWidth, height); 11718 11719 if (!matrixIsIdentity) { 11720 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11721 invalidate(true); 11722 } 11723 mBackgroundSizeChanged = true; 11724 if (mForegroundInfo != null) { 11725 mForegroundInfo.mBoundsChanged = true; 11726 } 11727 invalidateParentIfNeeded(); 11728 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11729 // View was rejected last time it was drawn by its parent; this may have changed 11730 invalidateParentIfNeeded(); 11731 } 11732 } 11733 } 11734 11735 /** 11736 * Right position of this view relative to its parent. 11737 * 11738 * @return The right edge of this view, in pixels. 11739 */ 11740 @ViewDebug.CapturedViewProperty 11741 public final int getRight() { 11742 return mRight; 11743 } 11744 11745 /** 11746 * Sets the right position of this view relative to its parent. This method is meant to be called 11747 * by the layout system and should not generally be called otherwise, because the property 11748 * may be changed at any time by the layout. 11749 * 11750 * @param right The right of this view, in pixels. 11751 */ 11752 public final void setRight(int right) { 11753 if (right != mRight) { 11754 final boolean matrixIsIdentity = hasIdentityMatrix(); 11755 if (matrixIsIdentity) { 11756 if (mAttachInfo != null) { 11757 int maxRight; 11758 if (right < mRight) { 11759 maxRight = mRight; 11760 } else { 11761 maxRight = right; 11762 } 11763 invalidate(0, 0, maxRight - mLeft, mBottom - mTop); 11764 } 11765 } else { 11766 // Double-invalidation is necessary to capture view's old and new areas 11767 invalidate(true); 11768 } 11769 11770 int oldWidth = mRight - mLeft; 11771 int height = mBottom - mTop; 11772 11773 mRight = right; 11774 mRenderNode.setRight(mRight); 11775 11776 sizeChange(mRight - mLeft, height, oldWidth, height); 11777 11778 if (!matrixIsIdentity) { 11779 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11780 invalidate(true); 11781 } 11782 mBackgroundSizeChanged = true; 11783 if (mForegroundInfo != null) { 11784 mForegroundInfo.mBoundsChanged = true; 11785 } 11786 invalidateParentIfNeeded(); 11787 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11788 // View was rejected last time it was drawn by its parent; this may have changed 11789 invalidateParentIfNeeded(); 11790 } 11791 } 11792 } 11793 11794 /** 11795 * The visual x position of this view, in pixels. This is equivalent to the 11796 * {@link #setTranslationX(float) translationX} property plus the current 11797 * {@link #getLeft() left} property. 11798 * 11799 * @return The visual x position of this view, in pixels. 11800 */ 11801 @ViewDebug.ExportedProperty(category = "drawing") 11802 public float getX() { 11803 return mLeft + getTranslationX(); 11804 } 11805 11806 /** 11807 * Sets the visual x position of this view, in pixels. This is equivalent to setting the 11808 * {@link #setTranslationX(float) translationX} property to be the difference between 11809 * the x value passed in and the current {@link #getLeft() left} property. 11810 * 11811 * @param x The visual x position of this view, in pixels. 11812 */ 11813 public void setX(float x) { 11814 setTranslationX(x - mLeft); 11815 } 11816 11817 /** 11818 * The visual y position of this view, in pixels. This is equivalent to the 11819 * {@link #setTranslationY(float) translationY} property plus the current 11820 * {@link #getTop() top} property. 11821 * 11822 * @return The visual y position of this view, in pixels. 11823 */ 11824 @ViewDebug.ExportedProperty(category = "drawing") 11825 public float getY() { 11826 return mTop + getTranslationY(); 11827 } 11828 11829 /** 11830 * Sets the visual y position of this view, in pixels. This is equivalent to setting the 11831 * {@link #setTranslationY(float) translationY} property to be the difference between 11832 * the y value passed in and the current {@link #getTop() top} property. 11833 * 11834 * @param y The visual y position of this view, in pixels. 11835 */ 11836 public void setY(float y) { 11837 setTranslationY(y - mTop); 11838 } 11839 11840 /** 11841 * The visual z position of this view, in pixels. This is equivalent to the 11842 * {@link #setTranslationZ(float) translationZ} property plus the current 11843 * {@link #getElevation() elevation} property. 11844 * 11845 * @return The visual z position of this view, in pixels. 11846 */ 11847 @ViewDebug.ExportedProperty(category = "drawing") 11848 public float getZ() { 11849 return getElevation() + getTranslationZ(); 11850 } 11851 11852 /** 11853 * Sets the visual z position of this view, in pixels. This is equivalent to setting the 11854 * {@link #setTranslationZ(float) translationZ} property to be the difference between 11855 * the x value passed in and the current {@link #getElevation() elevation} property. 11856 * 11857 * @param z The visual z position of this view, in pixels. 11858 */ 11859 public void setZ(float z) { 11860 setTranslationZ(z - getElevation()); 11861 } 11862 11863 /** 11864 * The base elevation of this view relative to its parent, in pixels. 11865 * 11866 * @return The base depth position of the view, in pixels. 11867 */ 11868 @ViewDebug.ExportedProperty(category = "drawing") 11869 public float getElevation() { 11870 return mRenderNode.getElevation(); 11871 } 11872 11873 /** 11874 * Sets the base elevation of this view, in pixels. 11875 * 11876 * @attr ref android.R.styleable#View_elevation 11877 */ 11878 public void setElevation(float elevation) { 11879 if (elevation != getElevation()) { 11880 invalidateViewProperty(true, false); 11881 mRenderNode.setElevation(elevation); 11882 invalidateViewProperty(false, true); 11883 11884 invalidateParentIfNeededAndWasQuickRejected(); 11885 } 11886 } 11887 11888 /** 11889 * The horizontal location of this view relative to its {@link #getLeft() left} position. 11890 * This position is post-layout, in addition to wherever the object's 11891 * layout placed it. 11892 * 11893 * @return The horizontal position of this view relative to its left position, in pixels. 11894 */ 11895 @ViewDebug.ExportedProperty(category = "drawing") 11896 public float getTranslationX() { 11897 return mRenderNode.getTranslationX(); 11898 } 11899 11900 /** 11901 * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. 11902 * This effectively positions the object post-layout, in addition to wherever the object's 11903 * layout placed it. 11904 * 11905 * @param translationX The horizontal position of this view relative to its left position, 11906 * in pixels. 11907 * 11908 * @attr ref android.R.styleable#View_translationX 11909 */ 11910 public void setTranslationX(float translationX) { 11911 if (translationX != getTranslationX()) { 11912 invalidateViewProperty(true, false); 11913 mRenderNode.setTranslationX(translationX); 11914 invalidateViewProperty(false, true); 11915 11916 invalidateParentIfNeededAndWasQuickRejected(); 11917 notifySubtreeAccessibilityStateChangedIfNeeded(); 11918 } 11919 } 11920 11921 /** 11922 * The vertical location of this view relative to its {@link #getTop() top} position. 11923 * This position is post-layout, in addition to wherever the object's 11924 * layout placed it. 11925 * 11926 * @return The vertical position of this view relative to its top position, 11927 * in pixels. 11928 */ 11929 @ViewDebug.ExportedProperty(category = "drawing") 11930 public float getTranslationY() { 11931 return mRenderNode.getTranslationY(); 11932 } 11933 11934 /** 11935 * Sets the vertical location of this view relative to its {@link #getTop() top} position. 11936 * This effectively positions the object post-layout, in addition to wherever the object's 11937 * layout placed it. 11938 * 11939 * @param translationY The vertical position of this view relative to its top position, 11940 * in pixels. 11941 * 11942 * @attr ref android.R.styleable#View_translationY 11943 */ 11944 public void setTranslationY(float translationY) { 11945 if (translationY != getTranslationY()) { 11946 invalidateViewProperty(true, false); 11947 mRenderNode.setTranslationY(translationY); 11948 invalidateViewProperty(false, true); 11949 11950 invalidateParentIfNeededAndWasQuickRejected(); 11951 notifySubtreeAccessibilityStateChangedIfNeeded(); 11952 } 11953 } 11954 11955 /** 11956 * The depth location of this view relative to its {@link #getElevation() elevation}. 11957 * 11958 * @return The depth of this view relative to its elevation. 11959 */ 11960 @ViewDebug.ExportedProperty(category = "drawing") 11961 public float getTranslationZ() { 11962 return mRenderNode.getTranslationZ(); 11963 } 11964 11965 /** 11966 * Sets the depth location of this view relative to its {@link #getElevation() elevation}. 11967 * 11968 * @attr ref android.R.styleable#View_translationZ 11969 */ 11970 public void setTranslationZ(float translationZ) { 11971 if (translationZ != getTranslationZ()) { 11972 invalidateViewProperty(true, false); 11973 mRenderNode.setTranslationZ(translationZ); 11974 invalidateViewProperty(false, true); 11975 11976 invalidateParentIfNeededAndWasQuickRejected(); 11977 } 11978 } 11979 11980 /** @hide */ 11981 public void setAnimationMatrix(Matrix matrix) { 11982 invalidateViewProperty(true, false); 11983 mRenderNode.setAnimationMatrix(matrix); 11984 invalidateViewProperty(false, true); 11985 11986 invalidateParentIfNeededAndWasQuickRejected(); 11987 } 11988 11989 /** 11990 * Returns the current StateListAnimator if exists. 11991 * 11992 * @return StateListAnimator or null if it does not exists 11993 * @see #setStateListAnimator(android.animation.StateListAnimator) 11994 */ 11995 public StateListAnimator getStateListAnimator() { 11996 return mStateListAnimator; 11997 } 11998 11999 /** 12000 * Attaches the provided StateListAnimator to this View. 12001 * <p> 12002 * Any previously attached StateListAnimator will be detached. 12003 * 12004 * @param stateListAnimator The StateListAnimator to update the view 12005 * @see {@link android.animation.StateListAnimator} 12006 */ 12007 public void setStateListAnimator(StateListAnimator stateListAnimator) { 12008 if (mStateListAnimator == stateListAnimator) { 12009 return; 12010 } 12011 if (mStateListAnimator != null) { 12012 mStateListAnimator.setTarget(null); 12013 } 12014 mStateListAnimator = stateListAnimator; 12015 if (stateListAnimator != null) { 12016 stateListAnimator.setTarget(this); 12017 if (isAttachedToWindow()) { 12018 stateListAnimator.setState(getDrawableState()); 12019 } 12020 } 12021 } 12022 12023 /** 12024 * Returns whether the Outline should be used to clip the contents of the View. 12025 * <p> 12026 * Note that this flag will only be respected if the View's Outline returns true from 12027 * {@link Outline#canClip()}. 12028 * 12029 * @see #setOutlineProvider(ViewOutlineProvider) 12030 * @see #setClipToOutline(boolean) 12031 */ 12032 public final boolean getClipToOutline() { 12033 return mRenderNode.getClipToOutline(); 12034 } 12035 12036 /** 12037 * Sets whether the View's Outline should be used to clip the contents of the View. 12038 * <p> 12039 * Only a single non-rectangular clip can be applied on a View at any time. 12040 * Circular clips from a {@link ViewAnimationUtils#createCircularReveal(View, int, int, float, float) 12041 * circular reveal} animation take priority over Outline clipping, and 12042 * child Outline clipping takes priority over Outline clipping done by a 12043 * parent. 12044 * <p> 12045 * Note that this flag will only be respected if the View's Outline returns true from 12046 * {@link Outline#canClip()}. 12047 * 12048 * @see #setOutlineProvider(ViewOutlineProvider) 12049 * @see #getClipToOutline() 12050 */ 12051 public void setClipToOutline(boolean clipToOutline) { 12052 damageInParent(); 12053 if (getClipToOutline() != clipToOutline) { 12054 mRenderNode.setClipToOutline(clipToOutline); 12055 } 12056 } 12057 12058 // correspond to the enum values of View_outlineProvider 12059 private static final int PROVIDER_BACKGROUND = 0; 12060 private static final int PROVIDER_NONE = 1; 12061 private static final int PROVIDER_BOUNDS = 2; 12062 private static final int PROVIDER_PADDED_BOUNDS = 3; 12063 private void setOutlineProviderFromAttribute(int providerInt) { 12064 switch (providerInt) { 12065 case PROVIDER_BACKGROUND: 12066 setOutlineProvider(ViewOutlineProvider.BACKGROUND); 12067 break; 12068 case PROVIDER_NONE: 12069 setOutlineProvider(null); 12070 break; 12071 case PROVIDER_BOUNDS: 12072 setOutlineProvider(ViewOutlineProvider.BOUNDS); 12073 break; 12074 case PROVIDER_PADDED_BOUNDS: 12075 setOutlineProvider(ViewOutlineProvider.PADDED_BOUNDS); 12076 break; 12077 } 12078 } 12079 12080 /** 12081 * Sets the {@link ViewOutlineProvider} of the view, which generates the Outline that defines 12082 * the shape of the shadow it casts, and enables outline clipping. 12083 * <p> 12084 * The default ViewOutlineProvider, {@link ViewOutlineProvider#BACKGROUND}, queries the Outline 12085 * from the View's background drawable, via {@link Drawable#getOutline(Outline)}. Changing the 12086 * outline provider with this method allows this behavior to be overridden. 12087 * <p> 12088 * If the ViewOutlineProvider is null, if querying it for an outline returns false, 12089 * or if the produced Outline is {@link Outline#isEmpty()}, shadows will not be cast. 12090 * <p> 12091 * Only outlines that return true from {@link Outline#canClip()} may be used for clipping. 12092 * 12093 * @see #setClipToOutline(boolean) 12094 * @see #getClipToOutline() 12095 * @see #getOutlineProvider() 12096 */ 12097 public void setOutlineProvider(ViewOutlineProvider provider) { 12098 mOutlineProvider = provider; 12099 invalidateOutline(); 12100 } 12101 12102 /** 12103 * Returns the current {@link ViewOutlineProvider} of the view, which generates the Outline 12104 * that defines the shape of the shadow it casts, and enables outline clipping. 12105 * 12106 * @see #setOutlineProvider(ViewOutlineProvider) 12107 */ 12108 public ViewOutlineProvider getOutlineProvider() { 12109 return mOutlineProvider; 12110 } 12111 12112 /** 12113 * Called to rebuild this View's Outline from its {@link ViewOutlineProvider outline provider} 12114 * 12115 * @see #setOutlineProvider(ViewOutlineProvider) 12116 */ 12117 public void invalidateOutline() { 12118 rebuildOutline(); 12119 12120 notifySubtreeAccessibilityStateChangedIfNeeded(); 12121 invalidateViewProperty(false, false); 12122 } 12123 12124 /** 12125 * Internal version of {@link #invalidateOutline()} which invalidates the 12126 * outline without invalidating the view itself. This is intended to be called from 12127 * within methods in the View class itself which are the result of the view being 12128 * invalidated already. For example, when we are drawing the background of a View, 12129 * we invalidate the outline in case it changed in the meantime, but we do not 12130 * need to invalidate the view because we're already drawing the background as part 12131 * of drawing the view in response to an earlier invalidation of the view. 12132 */ 12133 private void rebuildOutline() { 12134 // Unattached views ignore this signal, and outline is recomputed in onAttachedToWindow() 12135 if (mAttachInfo == null) return; 12136 12137 if (mOutlineProvider == null) { 12138 // no provider, remove outline 12139 mRenderNode.setOutline(null); 12140 } else { 12141 final Outline outline = mAttachInfo.mTmpOutline; 12142 outline.setEmpty(); 12143 outline.setAlpha(1.0f); 12144 12145 mOutlineProvider.getOutline(this, outline); 12146 mRenderNode.setOutline(outline); 12147 } 12148 } 12149 12150 /** 12151 * HierarchyViewer only 12152 * 12153 * @hide 12154 */ 12155 @ViewDebug.ExportedProperty(category = "drawing") 12156 public boolean hasShadow() { 12157 return mRenderNode.hasShadow(); 12158 } 12159 12160 12161 /** @hide */ 12162 public void setRevealClip(boolean shouldClip, float x, float y, float radius) { 12163 mRenderNode.setRevealClip(shouldClip, x, y, radius); 12164 invalidateViewProperty(false, false); 12165 } 12166 12167 /** 12168 * Hit rectangle in parent's coordinates 12169 * 12170 * @param outRect The hit rectangle of the view. 12171 */ 12172 public void getHitRect(Rect outRect) { 12173 if (hasIdentityMatrix() || mAttachInfo == null) { 12174 outRect.set(mLeft, mTop, mRight, mBottom); 12175 } else { 12176 final RectF tmpRect = mAttachInfo.mTmpTransformRect; 12177 tmpRect.set(0, 0, getWidth(), getHeight()); 12178 getMatrix().mapRect(tmpRect); // TODO: mRenderNode.mapRect(tmpRect) 12179 outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, 12180 (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); 12181 } 12182 } 12183 12184 /** 12185 * Determines whether the given point, in local coordinates is inside the view. 12186 */ 12187 /*package*/ final boolean pointInView(float localX, float localY) { 12188 return localX >= 0 && localX < (mRight - mLeft) 12189 && localY >= 0 && localY < (mBottom - mTop); 12190 } 12191 12192 /** 12193 * Utility method to determine whether the given point, in local coordinates, 12194 * is inside the view, where the area of the view is expanded by the slop factor. 12195 * This method is called while processing touch-move events to determine if the event 12196 * is still within the view. 12197 * 12198 * @hide 12199 */ 12200 public boolean pointInView(float localX, float localY, float slop) { 12201 return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && 12202 localY < ((mBottom - mTop) + slop); 12203 } 12204 12205 /** 12206 * When a view has focus and the user navigates away from it, the next view is searched for 12207 * starting from the rectangle filled in by this method. 12208 * 12209 * By default, the rectangle is the {@link #getDrawingRect(android.graphics.Rect)}) 12210 * of the view. However, if your view maintains some idea of internal selection, 12211 * such as a cursor, or a selected row or column, you should override this method and 12212 * fill in a more specific rectangle. 12213 * 12214 * @param r The rectangle to fill in, in this view's coordinates. 12215 */ 12216 public void getFocusedRect(Rect r) { 12217 getDrawingRect(r); 12218 } 12219 12220 /** 12221 * If some part of this view is not clipped by any of its parents, then 12222 * return that area in r in global (root) coordinates. To convert r to local 12223 * coordinates (without taking possible View rotations into account), offset 12224 * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). 12225 * If the view is completely clipped or translated out, return false. 12226 * 12227 * @param r If true is returned, r holds the global coordinates of the 12228 * visible portion of this view. 12229 * @param globalOffset If true is returned, globalOffset holds the dx,dy 12230 * between this view and its root. globalOffet may be null. 12231 * @return true if r is non-empty (i.e. part of the view is visible at the 12232 * root level. 12233 */ 12234 public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { 12235 int width = mRight - mLeft; 12236 int height = mBottom - mTop; 12237 if (width > 0 && height > 0) { 12238 r.set(0, 0, width, height); 12239 if (globalOffset != null) { 12240 globalOffset.set(-mScrollX, -mScrollY); 12241 } 12242 return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); 12243 } 12244 return false; 12245 } 12246 12247 public final boolean getGlobalVisibleRect(Rect r) { 12248 return getGlobalVisibleRect(r, null); 12249 } 12250 12251 public final boolean getLocalVisibleRect(Rect r) { 12252 final Point offset = mAttachInfo != null ? mAttachInfo.mPoint : new Point(); 12253 if (getGlobalVisibleRect(r, offset)) { 12254 r.offset(-offset.x, -offset.y); // make r local 12255 return true; 12256 } 12257 return false; 12258 } 12259 12260 /** 12261 * Offset this view's vertical location by the specified number of pixels. 12262 * 12263 * @param offset the number of pixels to offset the view by 12264 */ 12265 public void offsetTopAndBottom(int offset) { 12266 if (offset != 0) { 12267 final boolean matrixIsIdentity = hasIdentityMatrix(); 12268 if (matrixIsIdentity) { 12269 if (isHardwareAccelerated()) { 12270 invalidateViewProperty(false, false); 12271 } else { 12272 final ViewParent p = mParent; 12273 if (p != null && mAttachInfo != null) { 12274 final Rect r = mAttachInfo.mTmpInvalRect; 12275 int minTop; 12276 int maxBottom; 12277 int yLoc; 12278 if (offset < 0) { 12279 minTop = mTop + offset; 12280 maxBottom = mBottom; 12281 yLoc = offset; 12282 } else { 12283 minTop = mTop; 12284 maxBottom = mBottom + offset; 12285 yLoc = 0; 12286 } 12287 r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); 12288 p.invalidateChild(this, r); 12289 } 12290 } 12291 } else { 12292 invalidateViewProperty(false, false); 12293 } 12294 12295 mTop += offset; 12296 mBottom += offset; 12297 mRenderNode.offsetTopAndBottom(offset); 12298 if (isHardwareAccelerated()) { 12299 invalidateViewProperty(false, false); 12300 } else { 12301 if (!matrixIsIdentity) { 12302 invalidateViewProperty(false, true); 12303 } 12304 invalidateParentIfNeeded(); 12305 } 12306 notifySubtreeAccessibilityStateChangedIfNeeded(); 12307 } 12308 } 12309 12310 /** 12311 * Offset this view's horizontal location by the specified amount of pixels. 12312 * 12313 * @param offset the number of pixels to offset the view by 12314 */ 12315 public void offsetLeftAndRight(int offset) { 12316 if (offset != 0) { 12317 final boolean matrixIsIdentity = hasIdentityMatrix(); 12318 if (matrixIsIdentity) { 12319 if (isHardwareAccelerated()) { 12320 invalidateViewProperty(false, false); 12321 } else { 12322 final ViewParent p = mParent; 12323 if (p != null && mAttachInfo != null) { 12324 final Rect r = mAttachInfo.mTmpInvalRect; 12325 int minLeft; 12326 int maxRight; 12327 if (offset < 0) { 12328 minLeft = mLeft + offset; 12329 maxRight = mRight; 12330 } else { 12331 minLeft = mLeft; 12332 maxRight = mRight + offset; 12333 } 12334 r.set(0, 0, maxRight - minLeft, mBottom - mTop); 12335 p.invalidateChild(this, r); 12336 } 12337 } 12338 } else { 12339 invalidateViewProperty(false, false); 12340 } 12341 12342 mLeft += offset; 12343 mRight += offset; 12344 mRenderNode.offsetLeftAndRight(offset); 12345 if (isHardwareAccelerated()) { 12346 invalidateViewProperty(false, false); 12347 } else { 12348 if (!matrixIsIdentity) { 12349 invalidateViewProperty(false, true); 12350 } 12351 invalidateParentIfNeeded(); 12352 } 12353 notifySubtreeAccessibilityStateChangedIfNeeded(); 12354 } 12355 } 12356 12357 /** 12358 * Get the LayoutParams associated with this view. All views should have 12359 * layout parameters. These supply parameters to the <i>parent</i> of this 12360 * view specifying how it should be arranged. There are many subclasses of 12361 * ViewGroup.LayoutParams, and these correspond to the different subclasses 12362 * of ViewGroup that are responsible for arranging their children. 12363 * 12364 * This method may return null if this View is not attached to a parent 12365 * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} 12366 * was not invoked successfully. When a View is attached to a parent 12367 * ViewGroup, this method must not return null. 12368 * 12369 * @return The LayoutParams associated with this view, or null if no 12370 * parameters have been set yet 12371 */ 12372 @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") 12373 public ViewGroup.LayoutParams getLayoutParams() { 12374 return mLayoutParams; 12375 } 12376 12377 /** 12378 * Set the layout parameters associated with this view. These supply 12379 * parameters to the <i>parent</i> of this view specifying how it should be 12380 * arranged. There are many subclasses of ViewGroup.LayoutParams, and these 12381 * correspond to the different subclasses of ViewGroup that are responsible 12382 * for arranging their children. 12383 * 12384 * @param params The layout parameters for this view, cannot be null 12385 */ 12386 public void setLayoutParams(ViewGroup.LayoutParams params) { 12387 if (params == null) { 12388 throw new NullPointerException("Layout parameters cannot be null"); 12389 } 12390 mLayoutParams = params; 12391 resolveLayoutParams(); 12392 if (mParent instanceof ViewGroup) { 12393 ((ViewGroup) mParent).onSetLayoutParams(this, params); 12394 } 12395 requestLayout(); 12396 } 12397 12398 /** 12399 * Resolve the layout parameters depending on the resolved layout direction 12400 * 12401 * @hide 12402 */ 12403 public void resolveLayoutParams() { 12404 if (mLayoutParams != null) { 12405 mLayoutParams.resolveLayoutDirection(getLayoutDirection()); 12406 } 12407 } 12408 12409 /** 12410 * Set the scrolled position of your view. This will cause a call to 12411 * {@link #onScrollChanged(int, int, int, int)} and the view will be 12412 * invalidated. 12413 * @param x the x position to scroll to 12414 * @param y the y position to scroll to 12415 */ 12416 public void scrollTo(int x, int y) { 12417 if (mScrollX != x || mScrollY != y) { 12418 int oldX = mScrollX; 12419 int oldY = mScrollY; 12420 mScrollX = x; 12421 mScrollY = y; 12422 invalidateParentCaches(); 12423 onScrollChanged(mScrollX, mScrollY, oldX, oldY); 12424 if (!awakenScrollBars()) { 12425 postInvalidateOnAnimation(); 12426 } 12427 } 12428 } 12429 12430 /** 12431 * Move the scrolled position of your view. This will cause a call to 12432 * {@link #onScrollChanged(int, int, int, int)} and the view will be 12433 * invalidated. 12434 * @param x the amount of pixels to scroll by horizontally 12435 * @param y the amount of pixels to scroll by vertically 12436 */ 12437 public void scrollBy(int x, int y) { 12438 scrollTo(mScrollX + x, mScrollY + y); 12439 } 12440 12441 /** 12442 * <p>Trigger the scrollbars to draw. When invoked this method starts an 12443 * animation to fade the scrollbars out after a default delay. If a subclass 12444 * provides animated scrolling, the start delay should equal the duration 12445 * of the scrolling animation.</p> 12446 * 12447 * <p>The animation starts only if at least one of the scrollbars is 12448 * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and 12449 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 12450 * this method returns true, and false otherwise. If the animation is 12451 * started, this method calls {@link #invalidate()}; in that case the 12452 * caller should not call {@link #invalidate()}.</p> 12453 * 12454 * <p>This method should be invoked every time a subclass directly updates 12455 * the scroll parameters.</p> 12456 * 12457 * <p>This method is automatically invoked by {@link #scrollBy(int, int)} 12458 * and {@link #scrollTo(int, int)}.</p> 12459 * 12460 * @return true if the animation is played, false otherwise 12461 * 12462 * @see #awakenScrollBars(int) 12463 * @see #scrollBy(int, int) 12464 * @see #scrollTo(int, int) 12465 * @see #isHorizontalScrollBarEnabled() 12466 * @see #isVerticalScrollBarEnabled() 12467 * @see #setHorizontalScrollBarEnabled(boolean) 12468 * @see #setVerticalScrollBarEnabled(boolean) 12469 */ 12470 protected boolean awakenScrollBars() { 12471 return mScrollCache != null && 12472 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); 12473 } 12474 12475 /** 12476 * Trigger the scrollbars to draw. 12477 * This method differs from awakenScrollBars() only in its default duration. 12478 * initialAwakenScrollBars() will show the scroll bars for longer than 12479 * usual to give the user more of a chance to notice them. 12480 * 12481 * @return true if the animation is played, false otherwise. 12482 */ 12483 private boolean initialAwakenScrollBars() { 12484 return mScrollCache != null && 12485 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); 12486 } 12487 12488 /** 12489 * <p> 12490 * Trigger the scrollbars to draw. When invoked this method starts an 12491 * animation to fade the scrollbars out after a fixed delay. If a subclass 12492 * provides animated scrolling, the start delay should equal the duration of 12493 * the scrolling animation. 12494 * </p> 12495 * 12496 * <p> 12497 * The animation starts only if at least one of the scrollbars is enabled, 12498 * as specified by {@link #isHorizontalScrollBarEnabled()} and 12499 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 12500 * this method returns true, and false otherwise. If the animation is 12501 * started, this method calls {@link #invalidate()}; in that case the caller 12502 * should not call {@link #invalidate()}. 12503 * </p> 12504 * 12505 * <p> 12506 * This method should be invoked every time a subclass directly updates the 12507 * scroll parameters. 12508 * </p> 12509 * 12510 * @param startDelay the delay, in milliseconds, after which the animation 12511 * should start; when the delay is 0, the animation starts 12512 * immediately 12513 * @return true if the animation is played, false otherwise 12514 * 12515 * @see #scrollBy(int, int) 12516 * @see #scrollTo(int, int) 12517 * @see #isHorizontalScrollBarEnabled() 12518 * @see #isVerticalScrollBarEnabled() 12519 * @see #setHorizontalScrollBarEnabled(boolean) 12520 * @see #setVerticalScrollBarEnabled(boolean) 12521 */ 12522 protected boolean awakenScrollBars(int startDelay) { 12523 return awakenScrollBars(startDelay, true); 12524 } 12525 12526 /** 12527 * <p> 12528 * Trigger the scrollbars to draw. When invoked this method starts an 12529 * animation to fade the scrollbars out after a fixed delay. If a subclass 12530 * provides animated scrolling, the start delay should equal the duration of 12531 * the scrolling animation. 12532 * </p> 12533 * 12534 * <p> 12535 * The animation starts only if at least one of the scrollbars is enabled, 12536 * as specified by {@link #isHorizontalScrollBarEnabled()} and 12537 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 12538 * this method returns true, and false otherwise. If the animation is 12539 * started, this method calls {@link #invalidate()} if the invalidate parameter 12540 * is set to true; in that case the caller 12541 * should not call {@link #invalidate()}. 12542 * </p> 12543 * 12544 * <p> 12545 * This method should be invoked every time a subclass directly updates the 12546 * scroll parameters. 12547 * </p> 12548 * 12549 * @param startDelay the delay, in milliseconds, after which the animation 12550 * should start; when the delay is 0, the animation starts 12551 * immediately 12552 * 12553 * @param invalidate Whether this method should call invalidate 12554 * 12555 * @return true if the animation is played, false otherwise 12556 * 12557 * @see #scrollBy(int, int) 12558 * @see #scrollTo(int, int) 12559 * @see #isHorizontalScrollBarEnabled() 12560 * @see #isVerticalScrollBarEnabled() 12561 * @see #setHorizontalScrollBarEnabled(boolean) 12562 * @see #setVerticalScrollBarEnabled(boolean) 12563 */ 12564 protected boolean awakenScrollBars(int startDelay, boolean invalidate) { 12565 final ScrollabilityCache scrollCache = mScrollCache; 12566 12567 if (scrollCache == null || !scrollCache.fadeScrollBars) { 12568 return false; 12569 } 12570 12571 if (scrollCache.scrollBar == null) { 12572 scrollCache.scrollBar = new ScrollBarDrawable(); 12573 scrollCache.scrollBar.setCallback(this); 12574 scrollCache.scrollBar.setState(getDrawableState()); 12575 } 12576 12577 if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { 12578 12579 if (invalidate) { 12580 // Invalidate to show the scrollbars 12581 postInvalidateOnAnimation(); 12582 } 12583 12584 if (scrollCache.state == ScrollabilityCache.OFF) { 12585 // FIXME: this is copied from WindowManagerService. 12586 // We should get this value from the system when it 12587 // is possible to do so. 12588 final int KEY_REPEAT_FIRST_DELAY = 750; 12589 startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); 12590 } 12591 12592 // Tell mScrollCache when we should start fading. This may 12593 // extend the fade start time if one was already scheduled 12594 long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; 12595 scrollCache.fadeStartTime = fadeStartTime; 12596 scrollCache.state = ScrollabilityCache.ON; 12597 12598 // Schedule our fader to run, unscheduling any old ones first 12599 if (mAttachInfo != null) { 12600 mAttachInfo.mHandler.removeCallbacks(scrollCache); 12601 mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); 12602 } 12603 12604 return true; 12605 } 12606 12607 return false; 12608 } 12609 12610 /** 12611 * Do not invalidate views which are not visible and which are not running an animation. They 12612 * will not get drawn and they should not set dirty flags as if they will be drawn 12613 */ 12614 private boolean skipInvalidate() { 12615 return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && 12616 (!(mParent instanceof ViewGroup) || 12617 !((ViewGroup) mParent).isViewTransitioning(this)); 12618 } 12619 12620 /** 12621 * Mark the area defined by dirty as needing to be drawn. If the view is 12622 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some 12623 * point in the future. 12624 * <p> 12625 * This must be called from a UI thread. To call from a non-UI thread, call 12626 * {@link #postInvalidate()}. 12627 * <p> 12628 * <b>WARNING:</b> In API 19 and below, this method may be destructive to 12629 * {@code dirty}. 12630 * 12631 * @param dirty the rectangle representing the bounds of the dirty region 12632 */ 12633 public void invalidate(Rect dirty) { 12634 final int scrollX = mScrollX; 12635 final int scrollY = mScrollY; 12636 invalidateInternal(dirty.left - scrollX, dirty.top - scrollY, 12637 dirty.right - scrollX, dirty.bottom - scrollY, true, false); 12638 } 12639 12640 /** 12641 * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. The 12642 * coordinates of the dirty rect are relative to the view. If the view is 12643 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some 12644 * point in the future. 12645 * <p> 12646 * This must be called from a UI thread. To call from a non-UI thread, call 12647 * {@link #postInvalidate()}. 12648 * 12649 * @param l the left position of the dirty region 12650 * @param t the top position of the dirty region 12651 * @param r the right position of the dirty region 12652 * @param b the bottom position of the dirty region 12653 */ 12654 public void invalidate(int l, int t, int r, int b) { 12655 final int scrollX = mScrollX; 12656 final int scrollY = mScrollY; 12657 invalidateInternal(l - scrollX, t - scrollY, r - scrollX, b - scrollY, true, false); 12658 } 12659 12660 /** 12661 * Invalidate the whole view. If the view is visible, 12662 * {@link #onDraw(android.graphics.Canvas)} will be called at some point in 12663 * the future. 12664 * <p> 12665 * This must be called from a UI thread. To call from a non-UI thread, call 12666 * {@link #postInvalidate()}. 12667 */ 12668 public void invalidate() { 12669 invalidate(true); 12670 } 12671 12672 /** 12673 * This is where the invalidate() work actually happens. A full invalidate() 12674 * causes the drawing cache to be invalidated, but this function can be 12675 * called with invalidateCache set to false to skip that invalidation step 12676 * for cases that do not need it (for example, a component that remains at 12677 * the same dimensions with the same content). 12678 * 12679 * @param invalidateCache Whether the drawing cache for this view should be 12680 * invalidated as well. This is usually true for a full 12681 * invalidate, but may be set to false if the View's contents or 12682 * dimensions have not changed. 12683 */ 12684 void invalidate(boolean invalidateCache) { 12685 invalidateInternal(0, 0, mRight - mLeft, mBottom - mTop, invalidateCache, true); 12686 } 12687 12688 void invalidateInternal(int l, int t, int r, int b, boolean invalidateCache, 12689 boolean fullInvalidate) { 12690 if (mGhostView != null) { 12691 mGhostView.invalidate(true); 12692 return; 12693 } 12694 12695 if (skipInvalidate()) { 12696 return; 12697 } 12698 12699 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) 12700 || (invalidateCache && (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID) 12701 || (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED 12702 || (fullInvalidate && isOpaque() != mLastIsOpaque)) { 12703 if (fullInvalidate) { 12704 mLastIsOpaque = isOpaque(); 12705 mPrivateFlags &= ~PFLAG_DRAWN; 12706 } 12707 12708 mPrivateFlags |= PFLAG_DIRTY; 12709 12710 if (invalidateCache) { 12711 mPrivateFlags |= PFLAG_INVALIDATED; 12712 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 12713 } 12714 12715 // Propagate the damage rectangle to the parent view. 12716 final AttachInfo ai = mAttachInfo; 12717 final ViewParent p = mParent; 12718 if (p != null && ai != null && l < r && t < b) { 12719 final Rect damage = ai.mTmpInvalRect; 12720 damage.set(l, t, r, b); 12721 p.invalidateChild(this, damage); 12722 } 12723 12724 // Damage the entire projection receiver, if necessary. 12725 if (mBackground != null && mBackground.isProjected()) { 12726 final View receiver = getProjectionReceiver(); 12727 if (receiver != null) { 12728 receiver.damageInParent(); 12729 } 12730 } 12731 12732 // Damage the entire IsolatedZVolume receiving this view's shadow. 12733 if (isHardwareAccelerated() && getZ() != 0) { 12734 damageShadowReceiver(); 12735 } 12736 } 12737 } 12738 12739 /** 12740 * @return this view's projection receiver, or {@code null} if none exists 12741 */ 12742 private View getProjectionReceiver() { 12743 ViewParent p = getParent(); 12744 while (p != null && p instanceof View) { 12745 final View v = (View) p; 12746 if (v.isProjectionReceiver()) { 12747 return v; 12748 } 12749 p = p.getParent(); 12750 } 12751 12752 return null; 12753 } 12754 12755 /** 12756 * @return whether the view is a projection receiver 12757 */ 12758 private boolean isProjectionReceiver() { 12759 return mBackground != null; 12760 } 12761 12762 /** 12763 * Damage area of the screen that can be covered by this View's shadow. 12764 * 12765 * This method will guarantee that any changes to shadows cast by a View 12766 * are damaged on the screen for future redraw. 12767 */ 12768 private void damageShadowReceiver() { 12769 final AttachInfo ai = mAttachInfo; 12770 if (ai != null) { 12771 ViewParent p = getParent(); 12772 if (p != null && p instanceof ViewGroup) { 12773 final ViewGroup vg = (ViewGroup) p; 12774 vg.damageInParent(); 12775 } 12776 } 12777 } 12778 12779 /** 12780 * Quick invalidation for View property changes (alpha, translationXY, etc.). We don't want to 12781 * set any flags or handle all of the cases handled by the default invalidation methods. 12782 * Instead, we just want to schedule a traversal in ViewRootImpl with the appropriate 12783 * dirty rect. This method calls into fast invalidation methods in ViewGroup that 12784 * walk up the hierarchy, transforming the dirty rect as necessary. 12785 * 12786 * The method also handles normal invalidation logic if display list properties are not 12787 * being used in this view. The invalidateParent and forceRedraw flags are used by that 12788 * backup approach, to handle these cases used in the various property-setting methods. 12789 * 12790 * @param invalidateParent Force a call to invalidateParentCaches() if display list properties 12791 * are not being used in this view 12792 * @param forceRedraw Mark the view as DRAWN to force the invalidation to propagate, if display 12793 * list properties are not being used in this view 12794 */ 12795 void invalidateViewProperty(boolean invalidateParent, boolean forceRedraw) { 12796 if (!isHardwareAccelerated() 12797 || !mRenderNode.isValid() 12798 || (mPrivateFlags & PFLAG_DRAW_ANIMATION) != 0) { 12799 if (invalidateParent) { 12800 invalidateParentCaches(); 12801 } 12802 if (forceRedraw) { 12803 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 12804 } 12805 invalidate(false); 12806 } else { 12807 damageInParent(); 12808 } 12809 if (isHardwareAccelerated() && invalidateParent && getZ() != 0) { 12810 damageShadowReceiver(); 12811 } 12812 } 12813 12814 /** 12815 * Tells the parent view to damage this view's bounds. 12816 * 12817 * @hide 12818 */ 12819 protected void damageInParent() { 12820 final AttachInfo ai = mAttachInfo; 12821 final ViewParent p = mParent; 12822 if (p != null && ai != null) { 12823 final Rect r = ai.mTmpInvalRect; 12824 r.set(0, 0, mRight - mLeft, mBottom - mTop); 12825 if (mParent instanceof ViewGroup) { 12826 ((ViewGroup) mParent).damageChild(this, r); 12827 } else { 12828 mParent.invalidateChild(this, r); 12829 } 12830 } 12831 } 12832 12833 /** 12834 * Utility method to transform a given Rect by the current matrix of this view. 12835 */ 12836 void transformRect(final Rect rect) { 12837 if (!getMatrix().isIdentity()) { 12838 RectF boundingRect = mAttachInfo.mTmpTransformRect; 12839 boundingRect.set(rect); 12840 getMatrix().mapRect(boundingRect); 12841 rect.set((int) Math.floor(boundingRect.left), 12842 (int) Math.floor(boundingRect.top), 12843 (int) Math.ceil(boundingRect.right), 12844 (int) Math.ceil(boundingRect.bottom)); 12845 } 12846 } 12847 12848 /** 12849 * Used to indicate that the parent of this view should clear its caches. This functionality 12850 * is used to force the parent to rebuild its display list (when hardware-accelerated), 12851 * which is necessary when various parent-managed properties of the view change, such as 12852 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only 12853 * clears the parent caches and does not causes an invalidate event. 12854 * 12855 * @hide 12856 */ 12857 protected void invalidateParentCaches() { 12858 if (mParent instanceof View) { 12859 ((View) mParent).mPrivateFlags |= PFLAG_INVALIDATED; 12860 } 12861 } 12862 12863 /** 12864 * Used to indicate that the parent of this view should be invalidated. This functionality 12865 * is used to force the parent to rebuild its display list (when hardware-accelerated), 12866 * which is necessary when various parent-managed properties of the view change, such as 12867 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate 12868 * an invalidation event to the parent. 12869 * 12870 * @hide 12871 */ 12872 protected void invalidateParentIfNeeded() { 12873 if (isHardwareAccelerated() && mParent instanceof View) { 12874 ((View) mParent).invalidate(true); 12875 } 12876 } 12877 12878 /** 12879 * @hide 12880 */ 12881 protected void invalidateParentIfNeededAndWasQuickRejected() { 12882 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) != 0) { 12883 // View was rejected last time it was drawn by its parent; this may have changed 12884 invalidateParentIfNeeded(); 12885 } 12886 } 12887 12888 /** 12889 * Indicates whether this View is opaque. An opaque View guarantees that it will 12890 * draw all the pixels overlapping its bounds using a fully opaque color. 12891 * 12892 * Subclasses of View should override this method whenever possible to indicate 12893 * whether an instance is opaque. Opaque Views are treated in a special way by 12894 * the View hierarchy, possibly allowing it to perform optimizations during 12895 * invalidate/draw passes. 12896 * 12897 * @return True if this View is guaranteed to be fully opaque, false otherwise. 12898 */ 12899 @ViewDebug.ExportedProperty(category = "drawing") 12900 public boolean isOpaque() { 12901 return (mPrivateFlags & PFLAG_OPAQUE_MASK) == PFLAG_OPAQUE_MASK && 12902 getFinalAlpha() >= 1.0f; 12903 } 12904 12905 /** 12906 * @hide 12907 */ 12908 protected void computeOpaqueFlags() { 12909 // Opaque if: 12910 // - Has a background 12911 // - Background is opaque 12912 // - Doesn't have scrollbars or scrollbars overlay 12913 12914 if (mBackground != null && mBackground.getOpacity() == PixelFormat.OPAQUE) { 12915 mPrivateFlags |= PFLAG_OPAQUE_BACKGROUND; 12916 } else { 12917 mPrivateFlags &= ~PFLAG_OPAQUE_BACKGROUND; 12918 } 12919 12920 final int flags = mViewFlags; 12921 if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || 12922 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY || 12923 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_OUTSIDE_OVERLAY) { 12924 mPrivateFlags |= PFLAG_OPAQUE_SCROLLBARS; 12925 } else { 12926 mPrivateFlags &= ~PFLAG_OPAQUE_SCROLLBARS; 12927 } 12928 } 12929 12930 /** 12931 * @hide 12932 */ 12933 protected boolean hasOpaqueScrollbars() { 12934 return (mPrivateFlags & PFLAG_OPAQUE_SCROLLBARS) == PFLAG_OPAQUE_SCROLLBARS; 12935 } 12936 12937 /** 12938 * @return A handler associated with the thread running the View. This 12939 * handler can be used to pump events in the UI events queue. 12940 */ 12941 public Handler getHandler() { 12942 final AttachInfo attachInfo = mAttachInfo; 12943 if (attachInfo != null) { 12944 return attachInfo.mHandler; 12945 } 12946 return null; 12947 } 12948 12949 /** 12950 * Gets the view root associated with the View. 12951 * @return The view root, or null if none. 12952 * @hide 12953 */ 12954 public ViewRootImpl getViewRootImpl() { 12955 if (mAttachInfo != null) { 12956 return mAttachInfo.mViewRootImpl; 12957 } 12958 return null; 12959 } 12960 12961 /** 12962 * @hide 12963 */ 12964 public HardwareRenderer getHardwareRenderer() { 12965 return mAttachInfo != null ? mAttachInfo.mHardwareRenderer : null; 12966 } 12967 12968 /** 12969 * <p>Causes the Runnable to be added to the message queue. 12970 * The runnable will be run on the user interface thread.</p> 12971 * 12972 * @param action The Runnable that will be executed. 12973 * 12974 * @return Returns true if the Runnable was successfully placed in to the 12975 * message queue. Returns false on failure, usually because the 12976 * looper processing the message queue is exiting. 12977 * 12978 * @see #postDelayed 12979 * @see #removeCallbacks 12980 */ 12981 public boolean post(Runnable action) { 12982 final AttachInfo attachInfo = mAttachInfo; 12983 if (attachInfo != null) { 12984 return attachInfo.mHandler.post(action); 12985 } 12986 // Assume that post will succeed later 12987 ViewRootImpl.getRunQueue().post(action); 12988 return true; 12989 } 12990 12991 /** 12992 * <p>Causes the Runnable to be added to the message queue, to be run 12993 * after the specified amount of time elapses. 12994 * The runnable will be run on the user interface thread.</p> 12995 * 12996 * @param action The Runnable that will be executed. 12997 * @param delayMillis The delay (in milliseconds) until the Runnable 12998 * will be executed. 12999 * 13000 * @return true if the Runnable was successfully placed in to the 13001 * message queue. Returns false on failure, usually because the 13002 * looper processing the message queue is exiting. Note that a 13003 * result of true does not mean the Runnable will be processed -- 13004 * if the looper is quit before the delivery time of the message 13005 * occurs then the message will be dropped. 13006 * 13007 * @see #post 13008 * @see #removeCallbacks 13009 */ 13010 public boolean postDelayed(Runnable action, long delayMillis) { 13011 final AttachInfo attachInfo = mAttachInfo; 13012 if (attachInfo != null) { 13013 return attachInfo.mHandler.postDelayed(action, delayMillis); 13014 } 13015 // Assume that post will succeed later 13016 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 13017 return true; 13018 } 13019 13020 /** 13021 * <p>Causes the Runnable to execute on the next animation time step. 13022 * The runnable will be run on the user interface thread.</p> 13023 * 13024 * @param action The Runnable that will be executed. 13025 * 13026 * @see #postOnAnimationDelayed 13027 * @see #removeCallbacks 13028 */ 13029 public void postOnAnimation(Runnable action) { 13030 final AttachInfo attachInfo = mAttachInfo; 13031 if (attachInfo != null) { 13032 attachInfo.mViewRootImpl.mChoreographer.postCallback( 13033 Choreographer.CALLBACK_ANIMATION, action, null); 13034 } else { 13035 // Assume that post will succeed later 13036 ViewRootImpl.getRunQueue().post(action); 13037 } 13038 } 13039 13040 /** 13041 * <p>Causes the Runnable to execute on the next animation time step, 13042 * after the specified amount of time elapses. 13043 * The runnable will be run on the user interface thread.</p> 13044 * 13045 * @param action The Runnable that will be executed. 13046 * @param delayMillis The delay (in milliseconds) until the Runnable 13047 * will be executed. 13048 * 13049 * @see #postOnAnimation 13050 * @see #removeCallbacks 13051 */ 13052 public void postOnAnimationDelayed(Runnable action, long delayMillis) { 13053 final AttachInfo attachInfo = mAttachInfo; 13054 if (attachInfo != null) { 13055 attachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 13056 Choreographer.CALLBACK_ANIMATION, action, null, delayMillis); 13057 } else { 13058 // Assume that post will succeed later 13059 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 13060 } 13061 } 13062 13063 /** 13064 * <p>Removes the specified Runnable from the message queue.</p> 13065 * 13066 * @param action The Runnable to remove from the message handling queue 13067 * 13068 * @return true if this view could ask the Handler to remove the Runnable, 13069 * false otherwise. When the returned value is true, the Runnable 13070 * may or may not have been actually removed from the message queue 13071 * (for instance, if the Runnable was not in the queue already.) 13072 * 13073 * @see #post 13074 * @see #postDelayed 13075 * @see #postOnAnimation 13076 * @see #postOnAnimationDelayed 13077 */ 13078 public boolean removeCallbacks(Runnable action) { 13079 if (action != null) { 13080 final AttachInfo attachInfo = mAttachInfo; 13081 if (attachInfo != null) { 13082 attachInfo.mHandler.removeCallbacks(action); 13083 attachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 13084 Choreographer.CALLBACK_ANIMATION, action, null); 13085 } 13086 // Assume that post will succeed later 13087 ViewRootImpl.getRunQueue().removeCallbacks(action); 13088 } 13089 return true; 13090 } 13091 13092 /** 13093 * <p>Cause an invalidate to happen on a subsequent cycle through the event loop. 13094 * Use this to invalidate the View from a non-UI thread.</p> 13095 * 13096 * <p>This method can be invoked from outside of the UI thread 13097 * only when this View is attached to a window.</p> 13098 * 13099 * @see #invalidate() 13100 * @see #postInvalidateDelayed(long) 13101 */ 13102 public void postInvalidate() { 13103 postInvalidateDelayed(0); 13104 } 13105 13106 /** 13107 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 13108 * through the event loop. Use this to invalidate the View from a non-UI thread.</p> 13109 * 13110 * <p>This method can be invoked from outside of the UI thread 13111 * only when this View is attached to a window.</p> 13112 * 13113 * @param left The left coordinate of the rectangle to invalidate. 13114 * @param top The top coordinate of the rectangle to invalidate. 13115 * @param right The right coordinate of the rectangle to invalidate. 13116 * @param bottom The bottom coordinate of the rectangle to invalidate. 13117 * 13118 * @see #invalidate(int, int, int, int) 13119 * @see #invalidate(Rect) 13120 * @see #postInvalidateDelayed(long, int, int, int, int) 13121 */ 13122 public void postInvalidate(int left, int top, int right, int bottom) { 13123 postInvalidateDelayed(0, left, top, right, bottom); 13124 } 13125 13126 /** 13127 * <p>Cause an invalidate to happen on a subsequent cycle through the event 13128 * loop. Waits for the specified amount of time.</p> 13129 * 13130 * <p>This method can be invoked from outside of the UI thread 13131 * only when this View is attached to a window.</p> 13132 * 13133 * @param delayMilliseconds the duration in milliseconds to delay the 13134 * invalidation by 13135 * 13136 * @see #invalidate() 13137 * @see #postInvalidate() 13138 */ 13139 public void postInvalidateDelayed(long delayMilliseconds) { 13140 // We try only with the AttachInfo because there's no point in invalidating 13141 // if we are not attached to our window 13142 final AttachInfo attachInfo = mAttachInfo; 13143 if (attachInfo != null) { 13144 attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); 13145 } 13146 } 13147 13148 /** 13149 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 13150 * through the event loop. Waits for the specified amount of time.</p> 13151 * 13152 * <p>This method can be invoked from outside of the UI thread 13153 * only when this View is attached to a window.</p> 13154 * 13155 * @param delayMilliseconds the duration in milliseconds to delay the 13156 * invalidation by 13157 * @param left The left coordinate of the rectangle to invalidate. 13158 * @param top The top coordinate of the rectangle to invalidate. 13159 * @param right The right coordinate of the rectangle to invalidate. 13160 * @param bottom The bottom coordinate of the rectangle to invalidate. 13161 * 13162 * @see #invalidate(int, int, int, int) 13163 * @see #invalidate(Rect) 13164 * @see #postInvalidate(int, int, int, int) 13165 */ 13166 public void postInvalidateDelayed(long delayMilliseconds, int left, int top, 13167 int right, int bottom) { 13168 13169 // We try only with the AttachInfo because there's no point in invalidating 13170 // if we are not attached to our window 13171 final AttachInfo attachInfo = mAttachInfo; 13172 if (attachInfo != null) { 13173 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 13174 info.target = this; 13175 info.left = left; 13176 info.top = top; 13177 info.right = right; 13178 info.bottom = bottom; 13179 13180 attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); 13181 } 13182 } 13183 13184 /** 13185 * <p>Cause an invalidate to happen on the next animation time step, typically the 13186 * next display frame.</p> 13187 * 13188 * <p>This method can be invoked from outside of the UI thread 13189 * only when this View is attached to a window.</p> 13190 * 13191 * @see #invalidate() 13192 */ 13193 public void postInvalidateOnAnimation() { 13194 // We try only with the AttachInfo because there's no point in invalidating 13195 // if we are not attached to our window 13196 final AttachInfo attachInfo = mAttachInfo; 13197 if (attachInfo != null) { 13198 attachInfo.mViewRootImpl.dispatchInvalidateOnAnimation(this); 13199 } 13200 } 13201 13202 /** 13203 * <p>Cause an invalidate of the specified area to happen on the next animation 13204 * time step, typically the next display frame.</p> 13205 * 13206 * <p>This method can be invoked from outside of the UI thread 13207 * only when this View is attached to a window.</p> 13208 * 13209 * @param left The left coordinate of the rectangle to invalidate. 13210 * @param top The top coordinate of the rectangle to invalidate. 13211 * @param right The right coordinate of the rectangle to invalidate. 13212 * @param bottom The bottom coordinate of the rectangle to invalidate. 13213 * 13214 * @see #invalidate(int, int, int, int) 13215 * @see #invalidate(Rect) 13216 */ 13217 public void postInvalidateOnAnimation(int left, int top, int right, int bottom) { 13218 // We try only with the AttachInfo because there's no point in invalidating 13219 // if we are not attached to our window 13220 final AttachInfo attachInfo = mAttachInfo; 13221 if (attachInfo != null) { 13222 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 13223 info.target = this; 13224 info.left = left; 13225 info.top = top; 13226 info.right = right; 13227 info.bottom = bottom; 13228 13229 attachInfo.mViewRootImpl.dispatchInvalidateRectOnAnimation(info); 13230 } 13231 } 13232 13233 /** 13234 * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. 13235 * This event is sent at most once every 13236 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. 13237 */ 13238 private void postSendViewScrolledAccessibilityEventCallback() { 13239 if (mSendViewScrolledAccessibilityEvent == null) { 13240 mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); 13241 } 13242 if (!mSendViewScrolledAccessibilityEvent.mIsPending) { 13243 mSendViewScrolledAccessibilityEvent.mIsPending = true; 13244 postDelayed(mSendViewScrolledAccessibilityEvent, 13245 ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); 13246 } 13247 } 13248 13249 /** 13250 * Called by a parent to request that a child update its values for mScrollX 13251 * and mScrollY if necessary. This will typically be done if the child is 13252 * animating a scroll using a {@link android.widget.Scroller Scroller} 13253 * object. 13254 */ 13255 public void computeScroll() { 13256 } 13257 13258 /** 13259 * <p>Indicate whether the horizontal edges are faded when the view is 13260 * scrolled horizontally.</p> 13261 * 13262 * @return true if the horizontal edges should are faded on scroll, false 13263 * otherwise 13264 * 13265 * @see #setHorizontalFadingEdgeEnabled(boolean) 13266 * 13267 * @attr ref android.R.styleable#View_requiresFadingEdge 13268 */ 13269 public boolean isHorizontalFadingEdgeEnabled() { 13270 return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; 13271 } 13272 13273 /** 13274 * <p>Define whether the horizontal edges should be faded when this view 13275 * is scrolled horizontally.</p> 13276 * 13277 * @param horizontalFadingEdgeEnabled true if the horizontal edges should 13278 * be faded when the view is scrolled 13279 * horizontally 13280 * 13281 * @see #isHorizontalFadingEdgeEnabled() 13282 * 13283 * @attr ref android.R.styleable#View_requiresFadingEdge 13284 */ 13285 public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { 13286 if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { 13287 if (horizontalFadingEdgeEnabled) { 13288 initScrollCache(); 13289 } 13290 13291 mViewFlags ^= FADING_EDGE_HORIZONTAL; 13292 } 13293 } 13294 13295 /** 13296 * <p>Indicate whether the vertical edges are faded when the view is 13297 * scrolled horizontally.</p> 13298 * 13299 * @return true if the vertical edges should are faded on scroll, false 13300 * otherwise 13301 * 13302 * @see #setVerticalFadingEdgeEnabled(boolean) 13303 * 13304 * @attr ref android.R.styleable#View_requiresFadingEdge 13305 */ 13306 public boolean isVerticalFadingEdgeEnabled() { 13307 return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; 13308 } 13309 13310 /** 13311 * <p>Define whether the vertical edges should be faded when this view 13312 * is scrolled vertically.</p> 13313 * 13314 * @param verticalFadingEdgeEnabled true if the vertical edges should 13315 * be faded when the view is scrolled 13316 * vertically 13317 * 13318 * @see #isVerticalFadingEdgeEnabled() 13319 * 13320 * @attr ref android.R.styleable#View_requiresFadingEdge 13321 */ 13322 public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { 13323 if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { 13324 if (verticalFadingEdgeEnabled) { 13325 initScrollCache(); 13326 } 13327 13328 mViewFlags ^= FADING_EDGE_VERTICAL; 13329 } 13330 } 13331 13332 /** 13333 * Returns the strength, or intensity, of the top faded edge. The strength is 13334 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13335 * returns 0.0 or 1.0 but no value in between. 13336 * 13337 * Subclasses should override this method to provide a smoother fade transition 13338 * when scrolling occurs. 13339 * 13340 * @return the intensity of the top fade as a float between 0.0f and 1.0f 13341 */ 13342 protected float getTopFadingEdgeStrength() { 13343 return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; 13344 } 13345 13346 /** 13347 * Returns the strength, or intensity, of the bottom faded edge. The strength is 13348 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13349 * returns 0.0 or 1.0 but no value in between. 13350 * 13351 * Subclasses should override this method to provide a smoother fade transition 13352 * when scrolling occurs. 13353 * 13354 * @return the intensity of the bottom fade as a float between 0.0f and 1.0f 13355 */ 13356 protected float getBottomFadingEdgeStrength() { 13357 return computeVerticalScrollOffset() + computeVerticalScrollExtent() < 13358 computeVerticalScrollRange() ? 1.0f : 0.0f; 13359 } 13360 13361 /** 13362 * Returns the strength, or intensity, of the left faded edge. The strength is 13363 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13364 * returns 0.0 or 1.0 but no value in between. 13365 * 13366 * Subclasses should override this method to provide a smoother fade transition 13367 * when scrolling occurs. 13368 * 13369 * @return the intensity of the left fade as a float between 0.0f and 1.0f 13370 */ 13371 protected float getLeftFadingEdgeStrength() { 13372 return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; 13373 } 13374 13375 /** 13376 * Returns the strength, or intensity, of the right faded edge. The strength is 13377 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13378 * returns 0.0 or 1.0 but no value in between. 13379 * 13380 * Subclasses should override this method to provide a smoother fade transition 13381 * when scrolling occurs. 13382 * 13383 * @return the intensity of the right fade as a float between 0.0f and 1.0f 13384 */ 13385 protected float getRightFadingEdgeStrength() { 13386 return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < 13387 computeHorizontalScrollRange() ? 1.0f : 0.0f; 13388 } 13389 13390 /** 13391 * <p>Indicate whether the horizontal scrollbar should be drawn or not. The 13392 * scrollbar is not drawn by default.</p> 13393 * 13394 * @return true if the horizontal scrollbar should be painted, false 13395 * otherwise 13396 * 13397 * @see #setHorizontalScrollBarEnabled(boolean) 13398 */ 13399 public boolean isHorizontalScrollBarEnabled() { 13400 return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 13401 } 13402 13403 /** 13404 * <p>Define whether the horizontal scrollbar should be drawn or not. The 13405 * scrollbar is not drawn by default.</p> 13406 * 13407 * @param horizontalScrollBarEnabled true if the horizontal scrollbar should 13408 * be painted 13409 * 13410 * @see #isHorizontalScrollBarEnabled() 13411 */ 13412 public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { 13413 if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { 13414 mViewFlags ^= SCROLLBARS_HORIZONTAL; 13415 computeOpaqueFlags(); 13416 resolvePadding(); 13417 } 13418 } 13419 13420 /** 13421 * <p>Indicate whether the vertical scrollbar should be drawn or not. The 13422 * scrollbar is not drawn by default.</p> 13423 * 13424 * @return true if the vertical scrollbar should be painted, false 13425 * otherwise 13426 * 13427 * @see #setVerticalScrollBarEnabled(boolean) 13428 */ 13429 public boolean isVerticalScrollBarEnabled() { 13430 return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; 13431 } 13432 13433 /** 13434 * <p>Define whether the vertical scrollbar should be drawn or not. The 13435 * scrollbar is not drawn by default.</p> 13436 * 13437 * @param verticalScrollBarEnabled true if the vertical scrollbar should 13438 * be painted 13439 * 13440 * @see #isVerticalScrollBarEnabled() 13441 */ 13442 public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { 13443 if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { 13444 mViewFlags ^= SCROLLBARS_VERTICAL; 13445 computeOpaqueFlags(); 13446 resolvePadding(); 13447 } 13448 } 13449 13450 /** 13451 * @hide 13452 */ 13453 protected void recomputePadding() { 13454 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 13455 } 13456 13457 /** 13458 * Define whether scrollbars will fade when the view is not scrolling. 13459 * 13460 * @param fadeScrollbars whether to enable fading 13461 * 13462 * @attr ref android.R.styleable#View_fadeScrollbars 13463 */ 13464 public void setScrollbarFadingEnabled(boolean fadeScrollbars) { 13465 initScrollCache(); 13466 final ScrollabilityCache scrollabilityCache = mScrollCache; 13467 scrollabilityCache.fadeScrollBars = fadeScrollbars; 13468 if (fadeScrollbars) { 13469 scrollabilityCache.state = ScrollabilityCache.OFF; 13470 } else { 13471 scrollabilityCache.state = ScrollabilityCache.ON; 13472 } 13473 } 13474 13475 /** 13476 * 13477 * Returns true if scrollbars will fade when this view is not scrolling 13478 * 13479 * @return true if scrollbar fading is enabled 13480 * 13481 * @attr ref android.R.styleable#View_fadeScrollbars 13482 */ 13483 public boolean isScrollbarFadingEnabled() { 13484 return mScrollCache != null && mScrollCache.fadeScrollBars; 13485 } 13486 13487 /** 13488 * 13489 * Returns the delay before scrollbars fade. 13490 * 13491 * @return the delay before scrollbars fade 13492 * 13493 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 13494 */ 13495 public int getScrollBarDefaultDelayBeforeFade() { 13496 return mScrollCache == null ? ViewConfiguration.getScrollDefaultDelay() : 13497 mScrollCache.scrollBarDefaultDelayBeforeFade; 13498 } 13499 13500 /** 13501 * Define the delay before scrollbars fade. 13502 * 13503 * @param scrollBarDefaultDelayBeforeFade - the delay before scrollbars fade 13504 * 13505 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 13506 */ 13507 public void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) { 13508 getScrollCache().scrollBarDefaultDelayBeforeFade = scrollBarDefaultDelayBeforeFade; 13509 } 13510 13511 /** 13512 * 13513 * Returns the scrollbar fade duration. 13514 * 13515 * @return the scrollbar fade duration 13516 * 13517 * @attr ref android.R.styleable#View_scrollbarFadeDuration 13518 */ 13519 public int getScrollBarFadeDuration() { 13520 return mScrollCache == null ? ViewConfiguration.getScrollBarFadeDuration() : 13521 mScrollCache.scrollBarFadeDuration; 13522 } 13523 13524 /** 13525 * Define the scrollbar fade duration. 13526 * 13527 * @param scrollBarFadeDuration - the scrollbar fade duration 13528 * 13529 * @attr ref android.R.styleable#View_scrollbarFadeDuration 13530 */ 13531 public void setScrollBarFadeDuration(int scrollBarFadeDuration) { 13532 getScrollCache().scrollBarFadeDuration = scrollBarFadeDuration; 13533 } 13534 13535 /** 13536 * 13537 * Returns the scrollbar size. 13538 * 13539 * @return the scrollbar size 13540 * 13541 * @attr ref android.R.styleable#View_scrollbarSize 13542 */ 13543 public int getScrollBarSize() { 13544 return mScrollCache == null ? ViewConfiguration.get(mContext).getScaledScrollBarSize() : 13545 mScrollCache.scrollBarSize; 13546 } 13547 13548 /** 13549 * Define the scrollbar size. 13550 * 13551 * @param scrollBarSize - the scrollbar size 13552 * 13553 * @attr ref android.R.styleable#View_scrollbarSize 13554 */ 13555 public void setScrollBarSize(int scrollBarSize) { 13556 getScrollCache().scrollBarSize = scrollBarSize; 13557 } 13558 13559 /** 13560 * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or 13561 * inset. When inset, they add to the padding of the view. And the scrollbars 13562 * can be drawn inside the padding area or on the edge of the view. For example, 13563 * if a view has a background drawable and you want to draw the scrollbars 13564 * inside the padding specified by the drawable, you can use 13565 * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to 13566 * appear at the edge of the view, ignoring the padding, then you can use 13567 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> 13568 * @param style the style of the scrollbars. Should be one of 13569 * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, 13570 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. 13571 * @see #SCROLLBARS_INSIDE_OVERLAY 13572 * @see #SCROLLBARS_INSIDE_INSET 13573 * @see #SCROLLBARS_OUTSIDE_OVERLAY 13574 * @see #SCROLLBARS_OUTSIDE_INSET 13575 * 13576 * @attr ref android.R.styleable#View_scrollbarStyle 13577 */ 13578 public void setScrollBarStyle(@ScrollBarStyle int style) { 13579 if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { 13580 mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); 13581 computeOpaqueFlags(); 13582 resolvePadding(); 13583 } 13584 } 13585 13586 /** 13587 * <p>Returns the current scrollbar style.</p> 13588 * @return the current scrollbar style 13589 * @see #SCROLLBARS_INSIDE_OVERLAY 13590 * @see #SCROLLBARS_INSIDE_INSET 13591 * @see #SCROLLBARS_OUTSIDE_OVERLAY 13592 * @see #SCROLLBARS_OUTSIDE_INSET 13593 * 13594 * @attr ref android.R.styleable#View_scrollbarStyle 13595 */ 13596 @ViewDebug.ExportedProperty(mapping = { 13597 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), 13598 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), 13599 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), 13600 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") 13601 }) 13602 @ScrollBarStyle 13603 public int getScrollBarStyle() { 13604 return mViewFlags & SCROLLBARS_STYLE_MASK; 13605 } 13606 13607 /** 13608 * <p>Compute the horizontal range that the horizontal scrollbar 13609 * represents.</p> 13610 * 13611 * <p>The range is expressed in arbitrary units that must be the same as the 13612 * units used by {@link #computeHorizontalScrollExtent()} and 13613 * {@link #computeHorizontalScrollOffset()}.</p> 13614 * 13615 * <p>The default range is the drawing width of this view.</p> 13616 * 13617 * @return the total horizontal range represented by the horizontal 13618 * scrollbar 13619 * 13620 * @see #computeHorizontalScrollExtent() 13621 * @see #computeHorizontalScrollOffset() 13622 * @see android.widget.ScrollBarDrawable 13623 */ 13624 protected int computeHorizontalScrollRange() { 13625 return getWidth(); 13626 } 13627 13628 /** 13629 * <p>Compute the horizontal offset of the horizontal scrollbar's thumb 13630 * within the horizontal range. This value is used to compute the position 13631 * of the thumb within the scrollbar's track.</p> 13632 * 13633 * <p>The range is expressed in arbitrary units that must be the same as the 13634 * units used by {@link #computeHorizontalScrollRange()} and 13635 * {@link #computeHorizontalScrollExtent()}.</p> 13636 * 13637 * <p>The default offset is the scroll offset of this view.</p> 13638 * 13639 * @return the horizontal offset of the scrollbar's thumb 13640 * 13641 * @see #computeHorizontalScrollRange() 13642 * @see #computeHorizontalScrollExtent() 13643 * @see android.widget.ScrollBarDrawable 13644 */ 13645 protected int computeHorizontalScrollOffset() { 13646 return mScrollX; 13647 } 13648 13649 /** 13650 * <p>Compute the horizontal extent of the horizontal scrollbar's thumb 13651 * within the horizontal range. This value is used to compute the length 13652 * of the thumb within the scrollbar's track.</p> 13653 * 13654 * <p>The range is expressed in arbitrary units that must be the same as the 13655 * units used by {@link #computeHorizontalScrollRange()} and 13656 * {@link #computeHorizontalScrollOffset()}.</p> 13657 * 13658 * <p>The default extent is the drawing width of this view.</p> 13659 * 13660 * @return the horizontal extent of the scrollbar's thumb 13661 * 13662 * @see #computeHorizontalScrollRange() 13663 * @see #computeHorizontalScrollOffset() 13664 * @see android.widget.ScrollBarDrawable 13665 */ 13666 protected int computeHorizontalScrollExtent() { 13667 return getWidth(); 13668 } 13669 13670 /** 13671 * <p>Compute the vertical range that the vertical scrollbar represents.</p> 13672 * 13673 * <p>The range is expressed in arbitrary units that must be the same as the 13674 * units used by {@link #computeVerticalScrollExtent()} and 13675 * {@link #computeVerticalScrollOffset()}.</p> 13676 * 13677 * @return the total vertical range represented by the vertical scrollbar 13678 * 13679 * <p>The default range is the drawing height of this view.</p> 13680 * 13681 * @see #computeVerticalScrollExtent() 13682 * @see #computeVerticalScrollOffset() 13683 * @see android.widget.ScrollBarDrawable 13684 */ 13685 protected int computeVerticalScrollRange() { 13686 return getHeight(); 13687 } 13688 13689 /** 13690 * <p>Compute the vertical offset of the vertical scrollbar's thumb 13691 * within the horizontal range. This value is used to compute the position 13692 * of the thumb within the scrollbar's track.</p> 13693 * 13694 * <p>The range is expressed in arbitrary units that must be the same as the 13695 * units used by {@link #computeVerticalScrollRange()} and 13696 * {@link #computeVerticalScrollExtent()}.</p> 13697 * 13698 * <p>The default offset is the scroll offset of this view.</p> 13699 * 13700 * @return the vertical offset of the scrollbar's thumb 13701 * 13702 * @see #computeVerticalScrollRange() 13703 * @see #computeVerticalScrollExtent() 13704 * @see android.widget.ScrollBarDrawable 13705 */ 13706 protected int computeVerticalScrollOffset() { 13707 return mScrollY; 13708 } 13709 13710 /** 13711 * <p>Compute the vertical extent of the vertical scrollbar's thumb 13712 * within the vertical range. This value is used to compute the length 13713 * of the thumb within the scrollbar's track.</p> 13714 * 13715 * <p>The range is expressed in arbitrary units that must be the same as the 13716 * units used by {@link #computeVerticalScrollRange()} and 13717 * {@link #computeVerticalScrollOffset()}.</p> 13718 * 13719 * <p>The default extent is the drawing height of this view.</p> 13720 * 13721 * @return the vertical extent of the scrollbar's thumb 13722 * 13723 * @see #computeVerticalScrollRange() 13724 * @see #computeVerticalScrollOffset() 13725 * @see android.widget.ScrollBarDrawable 13726 */ 13727 protected int computeVerticalScrollExtent() { 13728 return getHeight(); 13729 } 13730 13731 /** 13732 * Check if this view can be scrolled horizontally in a certain direction. 13733 * 13734 * @param direction Negative to check scrolling left, positive to check scrolling right. 13735 * @return true if this view can be scrolled in the specified direction, false otherwise. 13736 */ 13737 public boolean canScrollHorizontally(int direction) { 13738 final int offset = computeHorizontalScrollOffset(); 13739 final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); 13740 if (range == 0) return false; 13741 if (direction < 0) { 13742 return offset > 0; 13743 } else { 13744 return offset < range - 1; 13745 } 13746 } 13747 13748 /** 13749 * Check if this view can be scrolled vertically in a certain direction. 13750 * 13751 * @param direction Negative to check scrolling up, positive to check scrolling down. 13752 * @return true if this view can be scrolled in the specified direction, false otherwise. 13753 */ 13754 public boolean canScrollVertically(int direction) { 13755 final int offset = computeVerticalScrollOffset(); 13756 final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); 13757 if (range == 0) return false; 13758 if (direction < 0) { 13759 return offset > 0; 13760 } else { 13761 return offset < range - 1; 13762 } 13763 } 13764 13765 void getScrollIndicatorBounds(@NonNull Rect out) { 13766 out.left = mScrollX; 13767 out.right = mScrollX + mRight - mLeft; 13768 out.top = mScrollY; 13769 out.bottom = mScrollY + mBottom - mTop; 13770 } 13771 13772 private void onDrawScrollIndicators(Canvas c) { 13773 if ((mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) == 0) { 13774 // No scroll indicators enabled. 13775 return; 13776 } 13777 13778 final Drawable dr = mScrollIndicatorDrawable; 13779 if (dr == null) { 13780 // Scroll indicators aren't supported here. 13781 return; 13782 } 13783 13784 final int h = dr.getIntrinsicHeight(); 13785 final int w = dr.getIntrinsicWidth(); 13786 final Rect rect = mAttachInfo.mTmpInvalRect; 13787 getScrollIndicatorBounds(rect); 13788 13789 if ((mPrivateFlags3 & PFLAG3_SCROLL_INDICATOR_TOP) != 0) { 13790 final boolean canScrollUp = canScrollVertically(-1); 13791 if (canScrollUp) { 13792 dr.setBounds(rect.left, rect.top, rect.right, rect.top + h); 13793 dr.draw(c); 13794 } 13795 } 13796 13797 if ((mPrivateFlags3 & PFLAG3_SCROLL_INDICATOR_BOTTOM) != 0) { 13798 final boolean canScrollDown = canScrollVertically(1); 13799 if (canScrollDown) { 13800 dr.setBounds(rect.left, rect.bottom - h, rect.right, rect.bottom); 13801 dr.draw(c); 13802 } 13803 } 13804 13805 final int leftRtl; 13806 final int rightRtl; 13807 if (getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 13808 leftRtl = PFLAG3_SCROLL_INDICATOR_END; 13809 rightRtl = PFLAG3_SCROLL_INDICATOR_START; 13810 } else { 13811 leftRtl = PFLAG3_SCROLL_INDICATOR_START; 13812 rightRtl = PFLAG3_SCROLL_INDICATOR_END; 13813 } 13814 13815 final int leftMask = PFLAG3_SCROLL_INDICATOR_LEFT | leftRtl; 13816 if ((mPrivateFlags3 & leftMask) != 0) { 13817 final boolean canScrollLeft = canScrollHorizontally(-1); 13818 if (canScrollLeft) { 13819 dr.setBounds(rect.left, rect.top, rect.left + w, rect.bottom); 13820 dr.draw(c); 13821 } 13822 } 13823 13824 final int rightMask = PFLAG3_SCROLL_INDICATOR_RIGHT | rightRtl; 13825 if ((mPrivateFlags3 & rightMask) != 0) { 13826 final boolean canScrollRight = canScrollHorizontally(1); 13827 if (canScrollRight) { 13828 dr.setBounds(rect.right - w, rect.top, rect.right, rect.bottom); 13829 dr.draw(c); 13830 } 13831 } 13832 } 13833 13834 /** 13835 * <p>Request the drawing of the horizontal and the vertical scrollbar. The 13836 * scrollbars are painted only if they have been awakened first.</p> 13837 * 13838 * @param canvas the canvas on which to draw the scrollbars 13839 * 13840 * @see #awakenScrollBars(int) 13841 */ 13842 protected final void onDrawScrollBars(Canvas canvas) { 13843 // scrollbars are drawn only when the animation is running 13844 final ScrollabilityCache cache = mScrollCache; 13845 if (cache != null) { 13846 13847 int state = cache.state; 13848 13849 if (state == ScrollabilityCache.OFF) { 13850 return; 13851 } 13852 13853 boolean invalidate = false; 13854 13855 if (state == ScrollabilityCache.FADING) { 13856 // We're fading -- get our fade interpolation 13857 if (cache.interpolatorValues == null) { 13858 cache.interpolatorValues = new float[1]; 13859 } 13860 13861 float[] values = cache.interpolatorValues; 13862 13863 // Stops the animation if we're done 13864 if (cache.scrollBarInterpolator.timeToValues(values) == 13865 Interpolator.Result.FREEZE_END) { 13866 cache.state = ScrollabilityCache.OFF; 13867 } else { 13868 cache.scrollBar.mutate().setAlpha(Math.round(values[0])); 13869 } 13870 13871 // This will make the scroll bars inval themselves after 13872 // drawing. We only want this when we're fading so that 13873 // we prevent excessive redraws 13874 invalidate = true; 13875 } else { 13876 // We're just on -- but we may have been fading before so 13877 // reset alpha 13878 cache.scrollBar.mutate().setAlpha(255); 13879 } 13880 13881 13882 final int viewFlags = mViewFlags; 13883 13884 final boolean drawHorizontalScrollBar = 13885 (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 13886 final boolean drawVerticalScrollBar = 13887 (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL 13888 && !isVerticalScrollBarHidden(); 13889 13890 if (drawVerticalScrollBar || drawHorizontalScrollBar) { 13891 final int width = mRight - mLeft; 13892 final int height = mBottom - mTop; 13893 13894 final ScrollBarDrawable scrollBar = cache.scrollBar; 13895 13896 final int scrollX = mScrollX; 13897 final int scrollY = mScrollY; 13898 final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; 13899 13900 int left; 13901 int top; 13902 int right; 13903 int bottom; 13904 13905 if (drawHorizontalScrollBar) { 13906 int size = scrollBar.getSize(false); 13907 if (size <= 0) { 13908 size = cache.scrollBarSize; 13909 } 13910 13911 scrollBar.setParameters(computeHorizontalScrollRange(), 13912 computeHorizontalScrollOffset(), 13913 computeHorizontalScrollExtent(), false); 13914 final int verticalScrollBarGap = drawVerticalScrollBar ? 13915 getVerticalScrollbarWidth() : 0; 13916 top = scrollY + height - size - (mUserPaddingBottom & inside); 13917 left = scrollX + (mPaddingLeft & inside); 13918 right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; 13919 bottom = top + size; 13920 onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); 13921 if (invalidate) { 13922 invalidate(left, top, right, bottom); 13923 } 13924 } 13925 13926 if (drawVerticalScrollBar) { 13927 int size = scrollBar.getSize(true); 13928 if (size <= 0) { 13929 size = cache.scrollBarSize; 13930 } 13931 13932 scrollBar.setParameters(computeVerticalScrollRange(), 13933 computeVerticalScrollOffset(), 13934 computeVerticalScrollExtent(), true); 13935 int verticalScrollbarPosition = mVerticalScrollbarPosition; 13936 if (verticalScrollbarPosition == SCROLLBAR_POSITION_DEFAULT) { 13937 verticalScrollbarPosition = isLayoutRtl() ? 13938 SCROLLBAR_POSITION_LEFT : SCROLLBAR_POSITION_RIGHT; 13939 } 13940 switch (verticalScrollbarPosition) { 13941 default: 13942 case SCROLLBAR_POSITION_RIGHT: 13943 left = scrollX + width - size - (mUserPaddingRight & inside); 13944 break; 13945 case SCROLLBAR_POSITION_LEFT: 13946 left = scrollX + (mUserPaddingLeft & inside); 13947 break; 13948 } 13949 top = scrollY + (mPaddingTop & inside); 13950 right = left + size; 13951 bottom = scrollY + height - (mUserPaddingBottom & inside); 13952 onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); 13953 if (invalidate) { 13954 invalidate(left, top, right, bottom); 13955 } 13956 } 13957 } 13958 } 13959 } 13960 13961 /** 13962 * Override this if the vertical scrollbar needs to be hidden in a subclass, like when 13963 * FastScroller is visible. 13964 * @return whether to temporarily hide the vertical scrollbar 13965 * @hide 13966 */ 13967 protected boolean isVerticalScrollBarHidden() { 13968 return false; 13969 } 13970 13971 /** 13972 * <p>Draw the horizontal scrollbar if 13973 * {@link #isHorizontalScrollBarEnabled()} returns true.</p> 13974 * 13975 * @param canvas the canvas on which to draw the scrollbar 13976 * @param scrollBar the scrollbar's drawable 13977 * 13978 * @see #isHorizontalScrollBarEnabled() 13979 * @see #computeHorizontalScrollRange() 13980 * @see #computeHorizontalScrollExtent() 13981 * @see #computeHorizontalScrollOffset() 13982 * @see android.widget.ScrollBarDrawable 13983 * @hide 13984 */ 13985 protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, 13986 int l, int t, int r, int b) { 13987 scrollBar.setBounds(l, t, r, b); 13988 scrollBar.draw(canvas); 13989 } 13990 13991 /** 13992 * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} 13993 * returns true.</p> 13994 * 13995 * @param canvas the canvas on which to draw the scrollbar 13996 * @param scrollBar the scrollbar's drawable 13997 * 13998 * @see #isVerticalScrollBarEnabled() 13999 * @see #computeVerticalScrollRange() 14000 * @see #computeVerticalScrollExtent() 14001 * @see #computeVerticalScrollOffset() 14002 * @see android.widget.ScrollBarDrawable 14003 * @hide 14004 */ 14005 protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, 14006 int l, int t, int r, int b) { 14007 scrollBar.setBounds(l, t, r, b); 14008 scrollBar.draw(canvas); 14009 } 14010 14011 /** 14012 * Implement this to do your drawing. 14013 * 14014 * @param canvas the canvas on which the background will be drawn 14015 */ 14016 protected void onDraw(Canvas canvas) { 14017 } 14018 14019 /* 14020 * Caller is responsible for calling requestLayout if necessary. 14021 * (This allows addViewInLayout to not request a new layout.) 14022 */ 14023 void assignParent(ViewParent parent) { 14024 if (mParent == null) { 14025 mParent = parent; 14026 } else if (parent == null) { 14027 mParent = null; 14028 } else { 14029 throw new RuntimeException("view " + this + " being added, but" 14030 + " it already has a parent"); 14031 } 14032 } 14033 14034 /** 14035 * This is called when the view is attached to a window. At this point it 14036 * has a Surface and will start drawing. Note that this function is 14037 * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, 14038 * however it may be called any time before the first onDraw -- including 14039 * before or after {@link #onMeasure(int, int)}. 14040 * 14041 * @see #onDetachedFromWindow() 14042 */ 14043 @CallSuper 14044 protected void onAttachedToWindow() { 14045 if ((mPrivateFlags & PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 14046 mParent.requestTransparentRegion(this); 14047 } 14048 14049 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 14050 14051 jumpDrawablesToCurrentState(); 14052 14053 resetSubtreeAccessibilityStateChanged(); 14054 14055 // rebuild, since Outline not maintained while View is detached 14056 rebuildOutline(); 14057 14058 if (isFocused()) { 14059 InputMethodManager imm = InputMethodManager.peekInstance(); 14060 if (imm != null) { 14061 imm.focusIn(this); 14062 } 14063 } 14064 } 14065 14066 /** 14067 * Resolve all RTL related properties. 14068 * 14069 * @return true if resolution of RTL properties has been done 14070 * 14071 * @hide 14072 */ 14073 public boolean resolveRtlPropertiesIfNeeded() { 14074 if (!needRtlPropertiesResolution()) return false; 14075 14076 // Order is important here: LayoutDirection MUST be resolved first 14077 if (!isLayoutDirectionResolved()) { 14078 resolveLayoutDirection(); 14079 resolveLayoutParams(); 14080 } 14081 // ... then we can resolve the others properties depending on the resolved LayoutDirection. 14082 if (!isTextDirectionResolved()) { 14083 resolveTextDirection(); 14084 } 14085 if (!isTextAlignmentResolved()) { 14086 resolveTextAlignment(); 14087 } 14088 // Should resolve Drawables before Padding because we need the layout direction of the 14089 // Drawable to correctly resolve Padding. 14090 if (!areDrawablesResolved()) { 14091 resolveDrawables(); 14092 } 14093 if (!isPaddingResolved()) { 14094 resolvePadding(); 14095 } 14096 onRtlPropertiesChanged(getLayoutDirection()); 14097 return true; 14098 } 14099 14100 /** 14101 * Reset resolution of all RTL related properties. 14102 * 14103 * @hide 14104 */ 14105 public void resetRtlProperties() { 14106 resetResolvedLayoutDirection(); 14107 resetResolvedTextDirection(); 14108 resetResolvedTextAlignment(); 14109 resetResolvedPadding(); 14110 resetResolvedDrawables(); 14111 } 14112 14113 /** 14114 * @see #onScreenStateChanged(int) 14115 */ 14116 void dispatchScreenStateChanged(int screenState) { 14117 onScreenStateChanged(screenState); 14118 } 14119 14120 /** 14121 * This method is called whenever the state of the screen this view is 14122 * attached to changes. A state change will usually occurs when the screen 14123 * turns on or off (whether it happens automatically or the user does it 14124 * manually.) 14125 * 14126 * @param screenState The new state of the screen. Can be either 14127 * {@link #SCREEN_STATE_ON} or {@link #SCREEN_STATE_OFF} 14128 */ 14129 public void onScreenStateChanged(int screenState) { 14130 } 14131 14132 /** 14133 * Return true if the application tag in the AndroidManifest has set "supportRtl" to true 14134 */ 14135 private boolean hasRtlSupport() { 14136 return mContext.getApplicationInfo().hasRtlSupport(); 14137 } 14138 14139 /** 14140 * Return true if we are in RTL compatibility mode (either before Jelly Bean MR1 or 14141 * RTL not supported) 14142 */ 14143 private boolean isRtlCompatibilityMode() { 14144 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 14145 return targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport(); 14146 } 14147 14148 /** 14149 * @return true if RTL properties need resolution. 14150 * 14151 */ 14152 private boolean needRtlPropertiesResolution() { 14153 return (mPrivateFlags2 & ALL_RTL_PROPERTIES_RESOLVED) != ALL_RTL_PROPERTIES_RESOLVED; 14154 } 14155 14156 /** 14157 * Called when any RTL property (layout direction or text direction or text alignment) has 14158 * been changed. 14159 * 14160 * Subclasses need to override this method to take care of cached information that depends on the 14161 * resolved layout direction, or to inform child views that inherit their layout direction. 14162 * 14163 * The default implementation does nothing. 14164 * 14165 * @param layoutDirection the direction of the layout 14166 * 14167 * @see #LAYOUT_DIRECTION_LTR 14168 * @see #LAYOUT_DIRECTION_RTL 14169 */ 14170 public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { 14171 } 14172 14173 /** 14174 * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing 14175 * that the parent directionality can and will be resolved before its children. 14176 * 14177 * @return true if resolution has been done, false otherwise. 14178 * 14179 * @hide 14180 */ 14181 public boolean resolveLayoutDirection() { 14182 // Clear any previous layout direction resolution 14183 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 14184 14185 if (hasRtlSupport()) { 14186 // Set resolved depending on layout direction 14187 switch ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> 14188 PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) { 14189 case LAYOUT_DIRECTION_INHERIT: 14190 // We cannot resolve yet. LTR is by default and let the resolution happen again 14191 // later to get the correct resolved value 14192 if (!canResolveLayoutDirection()) return false; 14193 14194 // Parent has not yet resolved, LTR is still the default 14195 try { 14196 if (!mParent.isLayoutDirectionResolved()) return false; 14197 14198 if (mParent.getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 14199 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 14200 } 14201 } catch (AbstractMethodError e) { 14202 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 14203 " does not fully implement ViewParent", e); 14204 } 14205 break; 14206 case LAYOUT_DIRECTION_RTL: 14207 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 14208 break; 14209 case LAYOUT_DIRECTION_LOCALE: 14210 if((LAYOUT_DIRECTION_RTL == 14211 TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()))) { 14212 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 14213 } 14214 break; 14215 default: 14216 // Nothing to do, LTR by default 14217 } 14218 } 14219 14220 // Set to resolved 14221 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 14222 return true; 14223 } 14224 14225 /** 14226 * Check if layout direction resolution can be done. 14227 * 14228 * @return true if layout direction resolution can be done otherwise return false. 14229 */ 14230 public boolean canResolveLayoutDirection() { 14231 switch (getRawLayoutDirection()) { 14232 case LAYOUT_DIRECTION_INHERIT: 14233 if (mParent != null) { 14234 try { 14235 return mParent.canResolveLayoutDirection(); 14236 } catch (AbstractMethodError e) { 14237 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 14238 " does not fully implement ViewParent", e); 14239 } 14240 } 14241 return false; 14242 14243 default: 14244 return true; 14245 } 14246 } 14247 14248 /** 14249 * Reset the resolved layout direction. Layout direction will be resolved during a call to 14250 * {@link #onMeasure(int, int)}. 14251 * 14252 * @hide 14253 */ 14254 public void resetResolvedLayoutDirection() { 14255 // Reset the current resolved bits 14256 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 14257 } 14258 14259 /** 14260 * @return true if the layout direction is inherited. 14261 * 14262 * @hide 14263 */ 14264 public boolean isLayoutDirectionInherited() { 14265 return (getRawLayoutDirection() == LAYOUT_DIRECTION_INHERIT); 14266 } 14267 14268 /** 14269 * @return true if layout direction has been resolved. 14270 */ 14271 public boolean isLayoutDirectionResolved() { 14272 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED) == PFLAG2_LAYOUT_DIRECTION_RESOLVED; 14273 } 14274 14275 /** 14276 * Return if padding has been resolved 14277 * 14278 * @hide 14279 */ 14280 boolean isPaddingResolved() { 14281 return (mPrivateFlags2 & PFLAG2_PADDING_RESOLVED) == PFLAG2_PADDING_RESOLVED; 14282 } 14283 14284 /** 14285 * Resolves padding depending on layout direction, if applicable, and 14286 * recomputes internal padding values to adjust for scroll bars. 14287 * 14288 * @hide 14289 */ 14290 public void resolvePadding() { 14291 final int resolvedLayoutDirection = getLayoutDirection(); 14292 14293 if (!isRtlCompatibilityMode()) { 14294 // Post Jelly Bean MR1 case: we need to take the resolved layout direction into account. 14295 // If start / end padding are defined, they will be resolved (hence overriding) to 14296 // left / right or right / left depending on the resolved layout direction. 14297 // If start / end padding are not defined, use the left / right ones. 14298 if (mBackground != null && (!mLeftPaddingDefined || !mRightPaddingDefined)) { 14299 Rect padding = sThreadLocal.get(); 14300 if (padding == null) { 14301 padding = new Rect(); 14302 sThreadLocal.set(padding); 14303 } 14304 mBackground.getPadding(padding); 14305 if (!mLeftPaddingDefined) { 14306 mUserPaddingLeftInitial = padding.left; 14307 } 14308 if (!mRightPaddingDefined) { 14309 mUserPaddingRightInitial = padding.right; 14310 } 14311 } 14312 switch (resolvedLayoutDirection) { 14313 case LAYOUT_DIRECTION_RTL: 14314 if (mUserPaddingStart != UNDEFINED_PADDING) { 14315 mUserPaddingRight = mUserPaddingStart; 14316 } else { 14317 mUserPaddingRight = mUserPaddingRightInitial; 14318 } 14319 if (mUserPaddingEnd != UNDEFINED_PADDING) { 14320 mUserPaddingLeft = mUserPaddingEnd; 14321 } else { 14322 mUserPaddingLeft = mUserPaddingLeftInitial; 14323 } 14324 break; 14325 case LAYOUT_DIRECTION_LTR: 14326 default: 14327 if (mUserPaddingStart != UNDEFINED_PADDING) { 14328 mUserPaddingLeft = mUserPaddingStart; 14329 } else { 14330 mUserPaddingLeft = mUserPaddingLeftInitial; 14331 } 14332 if (mUserPaddingEnd != UNDEFINED_PADDING) { 14333 mUserPaddingRight = mUserPaddingEnd; 14334 } else { 14335 mUserPaddingRight = mUserPaddingRightInitial; 14336 } 14337 } 14338 14339 mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; 14340 } 14341 14342 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 14343 onRtlPropertiesChanged(resolvedLayoutDirection); 14344 14345 mPrivateFlags2 |= PFLAG2_PADDING_RESOLVED; 14346 } 14347 14348 /** 14349 * Reset the resolved layout direction. 14350 * 14351 * @hide 14352 */ 14353 public void resetResolvedPadding() { 14354 resetResolvedPaddingInternal(); 14355 } 14356 14357 /** 14358 * Used when we only want to reset *this* view's padding and not trigger overrides 14359 * in ViewGroup that reset children too. 14360 */ 14361 void resetResolvedPaddingInternal() { 14362 mPrivateFlags2 &= ~PFLAG2_PADDING_RESOLVED; 14363 } 14364 14365 /** 14366 * This is called when the view is detached from a window. At this point it 14367 * no longer has a surface for drawing. 14368 * 14369 * @see #onAttachedToWindow() 14370 */ 14371 @CallSuper 14372 protected void onDetachedFromWindow() { 14373 } 14374 14375 /** 14376 * This is a framework-internal mirror of onDetachedFromWindow() that's called 14377 * after onDetachedFromWindow(). 14378 * 14379 * If you override this you *MUST* call super.onDetachedFromWindowInternal()! 14380 * The super method should be called at the end of the overridden method to ensure 14381 * subclasses are destroyed first 14382 * 14383 * @hide 14384 */ 14385 @CallSuper 14386 protected void onDetachedFromWindowInternal() { 14387 mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT; 14388 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 14389 14390 removeUnsetPressCallback(); 14391 removeLongPressCallback(); 14392 removePerformClickCallback(); 14393 removeSendViewScrolledAccessibilityEventCallback(); 14394 stopNestedScroll(); 14395 14396 // Anything that started animating right before detach should already 14397 // be in its final state when re-attached. 14398 jumpDrawablesToCurrentState(); 14399 14400 destroyDrawingCache(); 14401 14402 cleanupDraw(); 14403 mCurrentAnimation = null; 14404 } 14405 14406 private void cleanupDraw() { 14407 resetDisplayList(); 14408 if (mAttachInfo != null) { 14409 mAttachInfo.mViewRootImpl.cancelInvalidate(this); 14410 } 14411 } 14412 14413 void invalidateInheritedLayoutMode(int layoutModeOfRoot) { 14414 } 14415 14416 /** 14417 * @return The number of times this view has been attached to a window 14418 */ 14419 protected int getWindowAttachCount() { 14420 return mWindowAttachCount; 14421 } 14422 14423 /** 14424 * Retrieve a unique token identifying the window this view is attached to. 14425 * @return Return the window's token for use in 14426 * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. 14427 */ 14428 public IBinder getWindowToken() { 14429 return mAttachInfo != null ? mAttachInfo.mWindowToken : null; 14430 } 14431 14432 /** 14433 * Retrieve the {@link WindowId} for the window this view is 14434 * currently attached to. 14435 */ 14436 public WindowId getWindowId() { 14437 if (mAttachInfo == null) { 14438 return null; 14439 } 14440 if (mAttachInfo.mWindowId == null) { 14441 try { 14442 mAttachInfo.mIWindowId = mAttachInfo.mSession.getWindowId( 14443 mAttachInfo.mWindowToken); 14444 mAttachInfo.mWindowId = new WindowId( 14445 mAttachInfo.mIWindowId); 14446 } catch (RemoteException e) { 14447 } 14448 } 14449 return mAttachInfo.mWindowId; 14450 } 14451 14452 /** 14453 * Retrieve a unique token identifying the top-level "real" window of 14454 * the window that this view is attached to. That is, this is like 14455 * {@link #getWindowToken}, except if the window this view in is a panel 14456 * window (attached to another containing window), then the token of 14457 * the containing window is returned instead. 14458 * 14459 * @return Returns the associated window token, either 14460 * {@link #getWindowToken()} or the containing window's token. 14461 */ 14462 public IBinder getApplicationWindowToken() { 14463 AttachInfo ai = mAttachInfo; 14464 if (ai != null) { 14465 IBinder appWindowToken = ai.mPanelParentWindowToken; 14466 if (appWindowToken == null) { 14467 appWindowToken = ai.mWindowToken; 14468 } 14469 return appWindowToken; 14470 } 14471 return null; 14472 } 14473 14474 /** 14475 * Gets the logical display to which the view's window has been attached. 14476 * 14477 * @return The logical display, or null if the view is not currently attached to a window. 14478 */ 14479 public Display getDisplay() { 14480 return mAttachInfo != null ? mAttachInfo.mDisplay : null; 14481 } 14482 14483 /** 14484 * Retrieve private session object this view hierarchy is using to 14485 * communicate with the window manager. 14486 * @return the session object to communicate with the window manager 14487 */ 14488 /*package*/ IWindowSession getWindowSession() { 14489 return mAttachInfo != null ? mAttachInfo.mSession : null; 14490 } 14491 14492 /** 14493 * Return the visibility value of the least visible component passed. 14494 */ 14495 int combineVisibility(int vis1, int vis2) { 14496 // This works because VISIBLE < INVISIBLE < GONE. 14497 return Math.max(vis1, vis2); 14498 } 14499 14500 /** 14501 * @param info the {@link android.view.View.AttachInfo} to associated with 14502 * this view 14503 */ 14504 void dispatchAttachedToWindow(AttachInfo info, int visibility) { 14505 //System.out.println("Attached! " + this); 14506 mAttachInfo = info; 14507 if (mOverlay != null) { 14508 mOverlay.getOverlayView().dispatchAttachedToWindow(info, visibility); 14509 } 14510 mWindowAttachCount++; 14511 // We will need to evaluate the drawable state at least once. 14512 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 14513 if (mFloatingTreeObserver != null) { 14514 info.mTreeObserver.merge(mFloatingTreeObserver); 14515 mFloatingTreeObserver = null; 14516 } 14517 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER) != 0) { 14518 mAttachInfo.mScrollContainers.add(this); 14519 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 14520 } 14521 performCollectViewAttributes(mAttachInfo, visibility); 14522 onAttachedToWindow(); 14523 14524 ListenerInfo li = mListenerInfo; 14525 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 14526 li != null ? li.mOnAttachStateChangeListeners : null; 14527 if (listeners != null && listeners.size() > 0) { 14528 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 14529 // perform the dispatching. The iterator is a safe guard against listeners that 14530 // could mutate the list by calling the various add/remove methods. This prevents 14531 // the array from being modified while we iterate it. 14532 for (OnAttachStateChangeListener listener : listeners) { 14533 listener.onViewAttachedToWindow(this); 14534 } 14535 } 14536 14537 int vis = info.mWindowVisibility; 14538 if (vis != GONE) { 14539 onWindowVisibilityChanged(vis); 14540 } 14541 14542 // Send onVisibilityChanged directly instead of dispatchVisibilityChanged. 14543 // As all views in the subtree will already receive dispatchAttachedToWindow 14544 // traversing the subtree again here is not desired. 14545 onVisibilityChanged(this, visibility); 14546 14547 if ((mPrivateFlags&PFLAG_DRAWABLE_STATE_DIRTY) != 0) { 14548 // If nobody has evaluated the drawable state yet, then do it now. 14549 refreshDrawableState(); 14550 } 14551 needGlobalAttributesUpdate(false); 14552 } 14553 14554 void dispatchDetachedFromWindow() { 14555 AttachInfo info = mAttachInfo; 14556 if (info != null) { 14557 int vis = info.mWindowVisibility; 14558 if (vis != GONE) { 14559 onWindowVisibilityChanged(GONE); 14560 } 14561 } 14562 14563 onDetachedFromWindow(); 14564 onDetachedFromWindowInternal(); 14565 14566 InputMethodManager imm = InputMethodManager.peekInstance(); 14567 if (imm != null) { 14568 imm.onViewDetachedFromWindow(this); 14569 } 14570 14571 ListenerInfo li = mListenerInfo; 14572 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 14573 li != null ? li.mOnAttachStateChangeListeners : null; 14574 if (listeners != null && listeners.size() > 0) { 14575 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 14576 // perform the dispatching. The iterator is a safe guard against listeners that 14577 // could mutate the list by calling the various add/remove methods. This prevents 14578 // the array from being modified while we iterate it. 14579 for (OnAttachStateChangeListener listener : listeners) { 14580 listener.onViewDetachedFromWindow(this); 14581 } 14582 } 14583 14584 if ((mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 14585 mAttachInfo.mScrollContainers.remove(this); 14586 mPrivateFlags &= ~PFLAG_SCROLL_CONTAINER_ADDED; 14587 } 14588 14589 mAttachInfo = null; 14590 if (mOverlay != null) { 14591 mOverlay.getOverlayView().dispatchDetachedFromWindow(); 14592 } 14593 } 14594 14595 /** 14596 * Cancel any deferred high-level input events that were previously posted to the event queue. 14597 * 14598 * <p>Many views post high-level events such as click handlers to the event queue 14599 * to run deferred in order to preserve a desired user experience - clearing visible 14600 * pressed states before executing, etc. This method will abort any events of this nature 14601 * that are currently in flight.</p> 14602 * 14603 * <p>Custom views that generate their own high-level deferred input events should override 14604 * {@link #onCancelPendingInputEvents()} and remove those pending events from the queue.</p> 14605 * 14606 * <p>This will also cancel pending input events for any child views.</p> 14607 * 14608 * <p>Note that this may not be sufficient as a debouncing strategy for clicks in all cases. 14609 * This will not impact newer events posted after this call that may occur as a result of 14610 * lower-level input events still waiting in the queue. If you are trying to prevent 14611 * double-submitted events for the duration of some sort of asynchronous transaction 14612 * you should also take other steps to protect against unexpected double inputs e.g. calling 14613 * {@link #setEnabled(boolean) setEnabled(false)} and re-enabling the view when 14614 * the transaction completes, tracking already submitted transaction IDs, etc.</p> 14615 */ 14616 public final void cancelPendingInputEvents() { 14617 dispatchCancelPendingInputEvents(); 14618 } 14619 14620 /** 14621 * Called by {@link #cancelPendingInputEvents()} to cancel input events in flight. 14622 * Overridden by ViewGroup to dispatch. Package scoped to prevent app-side meddling. 14623 */ 14624 void dispatchCancelPendingInputEvents() { 14625 mPrivateFlags3 &= ~PFLAG3_CALLED_SUPER; 14626 onCancelPendingInputEvents(); 14627 if ((mPrivateFlags3 & PFLAG3_CALLED_SUPER) != PFLAG3_CALLED_SUPER) { 14628 throw new SuperNotCalledException("View " + getClass().getSimpleName() + 14629 " did not call through to super.onCancelPendingInputEvents()"); 14630 } 14631 } 14632 14633 /** 14634 * Called as the result of a call to {@link #cancelPendingInputEvents()} on this view or 14635 * a parent view. 14636 * 14637 * <p>This method is responsible for removing any pending high-level input events that were 14638 * posted to the event queue to run later. Custom view classes that post their own deferred 14639 * high-level events via {@link #post(Runnable)}, {@link #postDelayed(Runnable, long)} or 14640 * {@link android.os.Handler} should override this method, call 14641 * <code>super.onCancelPendingInputEvents()</code> and remove those callbacks as appropriate. 14642 * </p> 14643 */ 14644 public void onCancelPendingInputEvents() { 14645 removePerformClickCallback(); 14646 cancelLongPress(); 14647 mPrivateFlags3 |= PFLAG3_CALLED_SUPER; 14648 } 14649 14650 /** 14651 * Store this view hierarchy's frozen state into the given container. 14652 * 14653 * @param container The SparseArray in which to save the view's state. 14654 * 14655 * @see #restoreHierarchyState(android.util.SparseArray) 14656 * @see #dispatchSaveInstanceState(android.util.SparseArray) 14657 * @see #onSaveInstanceState() 14658 */ 14659 public void saveHierarchyState(SparseArray<Parcelable> container) { 14660 dispatchSaveInstanceState(container); 14661 } 14662 14663 /** 14664 * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for 14665 * this view and its children. May be overridden to modify how freezing happens to a 14666 * view's children; for example, some views may want to not store state for their children. 14667 * 14668 * @param container The SparseArray in which to save the view's state. 14669 * 14670 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 14671 * @see #saveHierarchyState(android.util.SparseArray) 14672 * @see #onSaveInstanceState() 14673 */ 14674 protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { 14675 if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { 14676 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 14677 Parcelable state = onSaveInstanceState(); 14678 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 14679 throw new IllegalStateException( 14680 "Derived class did not call super.onSaveInstanceState()"); 14681 } 14682 if (state != null) { 14683 // Log.i("View", "Freezing #" + Integer.toHexString(mID) 14684 // + ": " + state); 14685 container.put(mID, state); 14686 } 14687 } 14688 } 14689 14690 /** 14691 * Hook allowing a view to generate a representation of its internal state 14692 * that can later be used to create a new instance with that same state. 14693 * This state should only contain information that is not persistent or can 14694 * not be reconstructed later. For example, you will never store your 14695 * current position on screen because that will be computed again when a 14696 * new instance of the view is placed in its view hierarchy. 14697 * <p> 14698 * Some examples of things you may store here: the current cursor position 14699 * in a text view (but usually not the text itself since that is stored in a 14700 * content provider or other persistent storage), the currently selected 14701 * item in a list view. 14702 * 14703 * @return Returns a Parcelable object containing the view's current dynamic 14704 * state, or null if there is nothing interesting to save. The 14705 * default implementation returns null. 14706 * @see #onRestoreInstanceState(android.os.Parcelable) 14707 * @see #saveHierarchyState(android.util.SparseArray) 14708 * @see #dispatchSaveInstanceState(android.util.SparseArray) 14709 * @see #setSaveEnabled(boolean) 14710 */ 14711 @CallSuper 14712 protected Parcelable onSaveInstanceState() { 14713 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 14714 if (mStartActivityRequestWho != null) { 14715 BaseSavedState state = new BaseSavedState(AbsSavedState.EMPTY_STATE); 14716 state.mStartActivityRequestWhoSaved = mStartActivityRequestWho; 14717 return state; 14718 } 14719 return BaseSavedState.EMPTY_STATE; 14720 } 14721 14722 /** 14723 * Restore this view hierarchy's frozen state from the given container. 14724 * 14725 * @param container The SparseArray which holds previously frozen states. 14726 * 14727 * @see #saveHierarchyState(android.util.SparseArray) 14728 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 14729 * @see #onRestoreInstanceState(android.os.Parcelable) 14730 */ 14731 public void restoreHierarchyState(SparseArray<Parcelable> container) { 14732 dispatchRestoreInstanceState(container); 14733 } 14734 14735 /** 14736 * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the 14737 * state for this view and its children. May be overridden to modify how restoring 14738 * happens to a view's children; for example, some views may want to not store state 14739 * for their children. 14740 * 14741 * @param container The SparseArray which holds previously saved state. 14742 * 14743 * @see #dispatchSaveInstanceState(android.util.SparseArray) 14744 * @see #restoreHierarchyState(android.util.SparseArray) 14745 * @see #onRestoreInstanceState(android.os.Parcelable) 14746 */ 14747 protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { 14748 if (mID != NO_ID) { 14749 Parcelable state = container.get(mID); 14750 if (state != null) { 14751 // Log.i("View", "Restoreing #" + Integer.toHexString(mID) 14752 // + ": " + state); 14753 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 14754 onRestoreInstanceState(state); 14755 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 14756 throw new IllegalStateException( 14757 "Derived class did not call super.onRestoreInstanceState()"); 14758 } 14759 } 14760 } 14761 } 14762 14763 /** 14764 * Hook allowing a view to re-apply a representation of its internal state that had previously 14765 * been generated by {@link #onSaveInstanceState}. This function will never be called with a 14766 * null state. 14767 * 14768 * @param state The frozen state that had previously been returned by 14769 * {@link #onSaveInstanceState}. 14770 * 14771 * @see #onSaveInstanceState() 14772 * @see #restoreHierarchyState(android.util.SparseArray) 14773 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 14774 */ 14775 @CallSuper 14776 protected void onRestoreInstanceState(Parcelable state) { 14777 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 14778 if (state != null && !(state instanceof AbsSavedState)) { 14779 throw new IllegalArgumentException("Wrong state class, expecting View State but " 14780 + "received " + state.getClass().toString() + " instead. This usually happens " 14781 + "when two views of different type have the same id in the same hierarchy. " 14782 + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " 14783 + "other views do not use the same id."); 14784 } 14785 if (state != null && state instanceof BaseSavedState) { 14786 mStartActivityRequestWho = ((BaseSavedState) state).mStartActivityRequestWhoSaved; 14787 } 14788 } 14789 14790 /** 14791 * <p>Return the time at which the drawing of the view hierarchy started.</p> 14792 * 14793 * @return the drawing start time in milliseconds 14794 */ 14795 public long getDrawingTime() { 14796 return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; 14797 } 14798 14799 /** 14800 * <p>Enables or disables the duplication of the parent's state into this view. When 14801 * duplication is enabled, this view gets its drawable state from its parent rather 14802 * than from its own internal properties.</p> 14803 * 14804 * <p>Note: in the current implementation, setting this property to true after the 14805 * view was added to a ViewGroup might have no effect at all. This property should 14806 * always be used from XML or set to true before adding this view to a ViewGroup.</p> 14807 * 14808 * <p>Note: if this view's parent addStateFromChildren property is enabled and this 14809 * property is enabled, an exception will be thrown.</p> 14810 * 14811 * <p>Note: if the child view uses and updates additional states which are unknown to the 14812 * parent, these states should not be affected by this method.</p> 14813 * 14814 * @param enabled True to enable duplication of the parent's drawable state, false 14815 * to disable it. 14816 * 14817 * @see #getDrawableState() 14818 * @see #isDuplicateParentStateEnabled() 14819 */ 14820 public void setDuplicateParentStateEnabled(boolean enabled) { 14821 setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); 14822 } 14823 14824 /** 14825 * <p>Indicates whether this duplicates its drawable state from its parent.</p> 14826 * 14827 * @return True if this view's drawable state is duplicated from the parent, 14828 * false otherwise 14829 * 14830 * @see #getDrawableState() 14831 * @see #setDuplicateParentStateEnabled(boolean) 14832 */ 14833 public boolean isDuplicateParentStateEnabled() { 14834 return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; 14835 } 14836 14837 /** 14838 * <p>Specifies the type of layer backing this view. The layer can be 14839 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 14840 * {@link #LAYER_TYPE_HARDWARE}.</p> 14841 * 14842 * <p>A layer is associated with an optional {@link android.graphics.Paint} 14843 * instance that controls how the layer is composed on screen. The following 14844 * properties of the paint are taken into account when composing the layer:</p> 14845 * <ul> 14846 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 14847 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 14848 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 14849 * </ul> 14850 * 14851 * <p>If this view has an alpha value set to < 1.0 by calling 14852 * {@link #setAlpha(float)}, the alpha value of the layer's paint is superseded 14853 * by this view's alpha value.</p> 14854 * 14855 * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE}, 14856 * {@link #LAYER_TYPE_SOFTWARE} and {@link #LAYER_TYPE_HARDWARE} 14857 * for more information on when and how to use layers.</p> 14858 * 14859 * @param layerType The type of layer to use with this view, must be one of 14860 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 14861 * {@link #LAYER_TYPE_HARDWARE} 14862 * @param paint The paint used to compose the layer. This argument is optional 14863 * and can be null. It is ignored when the layer type is 14864 * {@link #LAYER_TYPE_NONE} 14865 * 14866 * @see #getLayerType() 14867 * @see #LAYER_TYPE_NONE 14868 * @see #LAYER_TYPE_SOFTWARE 14869 * @see #LAYER_TYPE_HARDWARE 14870 * @see #setAlpha(float) 14871 * 14872 * @attr ref android.R.styleable#View_layerType 14873 */ 14874 public void setLayerType(int layerType, Paint paint) { 14875 if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { 14876 throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " 14877 + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); 14878 } 14879 14880 boolean typeChanged = mRenderNode.setLayerType(layerType); 14881 14882 if (!typeChanged) { 14883 setLayerPaint(paint); 14884 return; 14885 } 14886 14887 // Destroy any previous software drawing cache if needed 14888 if (mLayerType == LAYER_TYPE_SOFTWARE) { 14889 destroyDrawingCache(); 14890 } 14891 14892 mLayerType = layerType; 14893 final boolean layerDisabled = (mLayerType == LAYER_TYPE_NONE); 14894 mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); 14895 mRenderNode.setLayerPaint(mLayerPaint); 14896 14897 // draw() behaves differently if we are on a layer, so we need to 14898 // invalidate() here 14899 invalidateParentCaches(); 14900 invalidate(true); 14901 } 14902 14903 /** 14904 * Updates the {@link Paint} object used with the current layer (used only if the current 14905 * layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint 14906 * provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time 14907 * the View is redrawn, but {@link #setLayerPaint(android.graphics.Paint)} must be called to 14908 * ensure that the view gets redrawn immediately. 14909 * 14910 * <p>A layer is associated with an optional {@link android.graphics.Paint} 14911 * instance that controls how the layer is composed on screen. The following 14912 * properties of the paint are taken into account when composing the layer:</p> 14913 * <ul> 14914 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 14915 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 14916 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 14917 * </ul> 14918 * 14919 * <p>If this view has an alpha value set to < 1.0 by calling {@link #setAlpha(float)}, the 14920 * alpha value of the layer's paint is superseded by this view's alpha value.</p> 14921 * 14922 * @param paint The paint used to compose the layer. This argument is optional 14923 * and can be null. It is ignored when the layer type is 14924 * {@link #LAYER_TYPE_NONE} 14925 * 14926 * @see #setLayerType(int, android.graphics.Paint) 14927 */ 14928 public void setLayerPaint(Paint paint) { 14929 int layerType = getLayerType(); 14930 if (layerType != LAYER_TYPE_NONE) { 14931 mLayerPaint = paint == null ? new Paint() : paint; 14932 if (layerType == LAYER_TYPE_HARDWARE) { 14933 if (mRenderNode.setLayerPaint(mLayerPaint)) { 14934 invalidateViewProperty(false, false); 14935 } 14936 } else { 14937 invalidate(); 14938 } 14939 } 14940 } 14941 14942 /** 14943 * Indicates what type of layer is currently associated with this view. By default 14944 * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. 14945 * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} 14946 * for more information on the different types of layers. 14947 * 14948 * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 14949 * {@link #LAYER_TYPE_HARDWARE} 14950 * 14951 * @see #setLayerType(int, android.graphics.Paint) 14952 * @see #buildLayer() 14953 * @see #LAYER_TYPE_NONE 14954 * @see #LAYER_TYPE_SOFTWARE 14955 * @see #LAYER_TYPE_HARDWARE 14956 */ 14957 public int getLayerType() { 14958 return mLayerType; 14959 } 14960 14961 /** 14962 * Forces this view's layer to be created and this view to be rendered 14963 * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, 14964 * invoking this method will have no effect. 14965 * 14966 * This method can for instance be used to render a view into its layer before 14967 * starting an animation. If this view is complex, rendering into the layer 14968 * before starting the animation will avoid skipping frames. 14969 * 14970 * @throws IllegalStateException If this view is not attached to a window 14971 * 14972 * @see #setLayerType(int, android.graphics.Paint) 14973 */ 14974 public void buildLayer() { 14975 if (mLayerType == LAYER_TYPE_NONE) return; 14976 14977 final AttachInfo attachInfo = mAttachInfo; 14978 if (attachInfo == null) { 14979 throw new IllegalStateException("This view must be attached to a window first"); 14980 } 14981 14982 if (getWidth() == 0 || getHeight() == 0) { 14983 return; 14984 } 14985 14986 switch (mLayerType) { 14987 case LAYER_TYPE_HARDWARE: 14988 updateDisplayListIfDirty(); 14989 if (attachInfo.mHardwareRenderer != null && mRenderNode.isValid()) { 14990 attachInfo.mHardwareRenderer.buildLayer(mRenderNode); 14991 } 14992 break; 14993 case LAYER_TYPE_SOFTWARE: 14994 buildDrawingCache(true); 14995 break; 14996 } 14997 } 14998 14999 /** 15000 * If this View draws with a HardwareLayer, returns it. 15001 * Otherwise returns null 15002 * 15003 * TODO: Only TextureView uses this, can we eliminate it? 15004 */ 15005 HardwareLayer getHardwareLayer() { 15006 return null; 15007 } 15008 15009 /** 15010 * Destroys all hardware rendering resources. This method is invoked 15011 * when the system needs to reclaim resources. Upon execution of this 15012 * method, you should free any OpenGL resources created by the view. 15013 * 15014 * Note: you <strong>must</strong> call 15015 * <code>super.destroyHardwareResources()</code> when overriding 15016 * this method. 15017 * 15018 * @hide 15019 */ 15020 @CallSuper 15021 protected void destroyHardwareResources() { 15022 // Although the Layer will be destroyed by RenderNode, we want to release 15023 // the staging display list, which is also a signal to RenderNode that it's 15024 // safe to free its copy of the display list as it knows that we will 15025 // push an updated DisplayList if we try to draw again 15026 resetDisplayList(); 15027 } 15028 15029 /** 15030 * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call 15031 * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a 15032 * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when 15033 * the cache is enabled. To benefit from the cache, you must request the drawing cache by 15034 * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not 15035 * null.</p> 15036 * 15037 * <p>Enabling the drawing cache is similar to 15038 * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware 15039 * acceleration is turned off. When hardware acceleration is turned on, enabling the 15040 * drawing cache has no effect on rendering because the system uses a different mechanism 15041 * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even 15042 * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} 15043 * for information on how to enable software and hardware layers.</p> 15044 * 15045 * <p>This API can be used to manually generate 15046 * a bitmap copy of this view, by setting the flag to <code>true</code> and calling 15047 * {@link #getDrawingCache()}.</p> 15048 * 15049 * @param enabled true to enable the drawing cache, false otherwise 15050 * 15051 * @see #isDrawingCacheEnabled() 15052 * @see #getDrawingCache() 15053 * @see #buildDrawingCache() 15054 * @see #setLayerType(int, android.graphics.Paint) 15055 */ 15056 public void setDrawingCacheEnabled(boolean enabled) { 15057 mCachingFailed = false; 15058 setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); 15059 } 15060 15061 /** 15062 * <p>Indicates whether the drawing cache is enabled for this view.</p> 15063 * 15064 * @return true if the drawing cache is enabled 15065 * 15066 * @see #setDrawingCacheEnabled(boolean) 15067 * @see #getDrawingCache() 15068 */ 15069 @ViewDebug.ExportedProperty(category = "drawing") 15070 public boolean isDrawingCacheEnabled() { 15071 return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; 15072 } 15073 15074 /** 15075 * Debugging utility which recursively outputs the dirty state of a view and its 15076 * descendants. 15077 * 15078 * @hide 15079 */ 15080 @SuppressWarnings({"UnusedDeclaration"}) 15081 public void outputDirtyFlags(String indent, boolean clear, int clearMask) { 15082 Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.PFLAG_DIRTY_MASK) + 15083 ") DRAWN(" + (mPrivateFlags & PFLAG_DRAWN) + ")" + " CACHE_VALID(" + 15084 (mPrivateFlags & View.PFLAG_DRAWING_CACHE_VALID) + 15085 ") INVALIDATED(" + (mPrivateFlags & PFLAG_INVALIDATED) + ")"); 15086 if (clear) { 15087 mPrivateFlags &= clearMask; 15088 } 15089 if (this instanceof ViewGroup) { 15090 ViewGroup parent = (ViewGroup) this; 15091 final int count = parent.getChildCount(); 15092 for (int i = 0; i < count; i++) { 15093 final View child = parent.getChildAt(i); 15094 child.outputDirtyFlags(indent + " ", clear, clearMask); 15095 } 15096 } 15097 } 15098 15099 /** 15100 * This method is used by ViewGroup to cause its children to restore or recreate their 15101 * display lists. It is called by getDisplayList() when the parent ViewGroup does not need 15102 * to recreate its own display list, which would happen if it went through the normal 15103 * draw/dispatchDraw mechanisms. 15104 * 15105 * @hide 15106 */ 15107 protected void dispatchGetDisplayList() {} 15108 15109 /** 15110 * A view that is not attached or hardware accelerated cannot create a display list. 15111 * This method checks these conditions and returns the appropriate result. 15112 * 15113 * @return true if view has the ability to create a display list, false otherwise. 15114 * 15115 * @hide 15116 */ 15117 public boolean canHaveDisplayList() { 15118 return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); 15119 } 15120 15121 /** 15122 * Gets the RenderNode for the view, and updates its DisplayList (if needed and supported) 15123 * @hide 15124 */ 15125 @NonNull 15126 public RenderNode updateDisplayListIfDirty() { 15127 final RenderNode renderNode = mRenderNode; 15128 if (!canHaveDisplayList()) { 15129 // can't populate RenderNode, don't try 15130 return renderNode; 15131 } 15132 15133 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 15134 || !renderNode.isValid() 15135 || (mRecreateDisplayList)) { 15136 // Don't need to recreate the display list, just need to tell our 15137 // children to restore/recreate theirs 15138 if (renderNode.isValid() 15139 && !mRecreateDisplayList) { 15140 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 15141 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15142 dispatchGetDisplayList(); 15143 15144 return renderNode; // no work needed 15145 } 15146 15147 // If we got here, we're recreating it. Mark it as such to ensure that 15148 // we copy in child display lists into ours in drawChild() 15149 mRecreateDisplayList = true; 15150 15151 int width = mRight - mLeft; 15152 int height = mBottom - mTop; 15153 int layerType = getLayerType(); 15154 15155 final DisplayListCanvas canvas = renderNode.start(width, height); 15156 canvas.setHighContrastText(mAttachInfo.mHighContrastText); 15157 15158 try { 15159 final HardwareLayer layer = getHardwareLayer(); 15160 if (layer != null && layer.isValid()) { 15161 canvas.drawHardwareLayer(layer, 0, 0, mLayerPaint); 15162 } else if (layerType == LAYER_TYPE_SOFTWARE) { 15163 buildDrawingCache(true); 15164 Bitmap cache = getDrawingCache(true); 15165 if (cache != null) { 15166 canvas.drawBitmap(cache, 0, 0, mLayerPaint); 15167 } 15168 } else { 15169 computeScroll(); 15170 15171 canvas.translate(-mScrollX, -mScrollY); 15172 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 15173 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15174 15175 // Fast path for layouts with no backgrounds 15176 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 15177 dispatchDraw(canvas); 15178 if (mOverlay != null && !mOverlay.isEmpty()) { 15179 mOverlay.getOverlayView().draw(canvas); 15180 } 15181 } else { 15182 draw(canvas); 15183 } 15184 } 15185 } finally { 15186 renderNode.end(canvas); 15187 setDisplayListProperties(renderNode); 15188 } 15189 } else { 15190 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 15191 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15192 } 15193 return renderNode; 15194 } 15195 15196 private void resetDisplayList() { 15197 if (mRenderNode.isValid()) { 15198 mRenderNode.destroyDisplayListData(); 15199 } 15200 15201 if (mBackgroundRenderNode != null && mBackgroundRenderNode.isValid()) { 15202 mBackgroundRenderNode.destroyDisplayListData(); 15203 } 15204 } 15205 15206 /** 15207 * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> 15208 * 15209 * @return A non-scaled bitmap representing this view or null if cache is disabled. 15210 * 15211 * @see #getDrawingCache(boolean) 15212 */ 15213 public Bitmap getDrawingCache() { 15214 return getDrawingCache(false); 15215 } 15216 15217 /** 15218 * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap 15219 * is null when caching is disabled. If caching is enabled and the cache is not ready, 15220 * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not 15221 * draw from the cache when the cache is enabled. To benefit from the cache, you must 15222 * request the drawing cache by calling this method and draw it on screen if the 15223 * returned bitmap is not null.</p> 15224 * 15225 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 15226 * this method will create a bitmap of the same size as this view. Because this bitmap 15227 * will be drawn scaled by the parent ViewGroup, the result on screen might show 15228 * scaling artifacts. To avoid such artifacts, you should call this method by setting 15229 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 15230 * size than the view. This implies that your application must be able to handle this 15231 * size.</p> 15232 * 15233 * @param autoScale Indicates whether the generated bitmap should be scaled based on 15234 * the current density of the screen when the application is in compatibility 15235 * mode. 15236 * 15237 * @return A bitmap representing this view or null if cache is disabled. 15238 * 15239 * @see #setDrawingCacheEnabled(boolean) 15240 * @see #isDrawingCacheEnabled() 15241 * @see #buildDrawingCache(boolean) 15242 * @see #destroyDrawingCache() 15243 */ 15244 public Bitmap getDrawingCache(boolean autoScale) { 15245 if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { 15246 return null; 15247 } 15248 if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { 15249 buildDrawingCache(autoScale); 15250 } 15251 return autoScale ? mDrawingCache : mUnscaledDrawingCache; 15252 } 15253 15254 /** 15255 * <p>Frees the resources used by the drawing cache. If you call 15256 * {@link #buildDrawingCache()} manually without calling 15257 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 15258 * should cleanup the cache with this method afterwards.</p> 15259 * 15260 * @see #setDrawingCacheEnabled(boolean) 15261 * @see #buildDrawingCache() 15262 * @see #getDrawingCache() 15263 */ 15264 public void destroyDrawingCache() { 15265 if (mDrawingCache != null) { 15266 mDrawingCache.recycle(); 15267 mDrawingCache = null; 15268 } 15269 if (mUnscaledDrawingCache != null) { 15270 mUnscaledDrawingCache.recycle(); 15271 mUnscaledDrawingCache = null; 15272 } 15273 } 15274 15275 /** 15276 * Setting a solid background color for the drawing cache's bitmaps will improve 15277 * performance and memory usage. Note, though that this should only be used if this 15278 * view will always be drawn on top of a solid color. 15279 * 15280 * @param color The background color to use for the drawing cache's bitmap 15281 * 15282 * @see #setDrawingCacheEnabled(boolean) 15283 * @see #buildDrawingCache() 15284 * @see #getDrawingCache() 15285 */ 15286 public void setDrawingCacheBackgroundColor(@ColorInt int color) { 15287 if (color != mDrawingCacheBackgroundColor) { 15288 mDrawingCacheBackgroundColor = color; 15289 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 15290 } 15291 } 15292 15293 /** 15294 * @see #setDrawingCacheBackgroundColor(int) 15295 * 15296 * @return The background color to used for the drawing cache's bitmap 15297 */ 15298 @ColorInt 15299 public int getDrawingCacheBackgroundColor() { 15300 return mDrawingCacheBackgroundColor; 15301 } 15302 15303 /** 15304 * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> 15305 * 15306 * @see #buildDrawingCache(boolean) 15307 */ 15308 public void buildDrawingCache() { 15309 buildDrawingCache(false); 15310 } 15311 15312 /** 15313 * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> 15314 * 15315 * <p>If you call {@link #buildDrawingCache()} manually without calling 15316 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 15317 * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> 15318 * 15319 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 15320 * this method will create a bitmap of the same size as this view. Because this bitmap 15321 * will be drawn scaled by the parent ViewGroup, the result on screen might show 15322 * scaling artifacts. To avoid such artifacts, you should call this method by setting 15323 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 15324 * size than the view. This implies that your application must be able to handle this 15325 * size.</p> 15326 * 15327 * <p>You should avoid calling this method when hardware acceleration is enabled. If 15328 * you do not need the drawing cache bitmap, calling this method will increase memory 15329 * usage and cause the view to be rendered in software once, thus negatively impacting 15330 * performance.</p> 15331 * 15332 * @see #getDrawingCache() 15333 * @see #destroyDrawingCache() 15334 */ 15335 public void buildDrawingCache(boolean autoScale) { 15336 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || (autoScale ? 15337 mDrawingCache == null : mUnscaledDrawingCache == null)) { 15338 if (Trace.isTagEnabled(Trace.TRACE_TAG_VIEW)) { 15339 Trace.traceBegin(Trace.TRACE_TAG_VIEW, 15340 "buildDrawingCache/SW Layer for " + getClass().getSimpleName()); 15341 } 15342 try { 15343 buildDrawingCacheImpl(autoScale); 15344 } finally { 15345 Trace.traceEnd(Trace.TRACE_TAG_VIEW); 15346 } 15347 } 15348 } 15349 15350 /** 15351 * private, internal implementation of buildDrawingCache, used to enable tracing 15352 */ 15353 private void buildDrawingCacheImpl(boolean autoScale) { 15354 mCachingFailed = false; 15355 15356 int width = mRight - mLeft; 15357 int height = mBottom - mTop; 15358 15359 final AttachInfo attachInfo = mAttachInfo; 15360 final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; 15361 15362 if (autoScale && scalingRequired) { 15363 width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); 15364 height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); 15365 } 15366 15367 final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; 15368 final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); 15369 final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; 15370 15371 final long projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4); 15372 final long drawingCacheSize = 15373 ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize(); 15374 if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) { 15375 if (width > 0 && height > 0) { 15376 Log.w(VIEW_LOG_TAG, "View too large to fit into drawing cache, needs " 15377 + projectedBitmapSize + " bytes, only " 15378 + drawingCacheSize + " available"); 15379 } 15380 destroyDrawingCache(); 15381 mCachingFailed = true; 15382 return; 15383 } 15384 15385 boolean clear = true; 15386 Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; 15387 15388 if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { 15389 Bitmap.Config quality; 15390 if (!opaque) { 15391 // Never pick ARGB_4444 because it looks awful 15392 // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case 15393 switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { 15394 case DRAWING_CACHE_QUALITY_AUTO: 15395 case DRAWING_CACHE_QUALITY_LOW: 15396 case DRAWING_CACHE_QUALITY_HIGH: 15397 default: 15398 quality = Bitmap.Config.ARGB_8888; 15399 break; 15400 } 15401 } else { 15402 // Optimization for translucent windows 15403 // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() 15404 quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 15405 } 15406 15407 // Try to cleanup memory 15408 if (bitmap != null) bitmap.recycle(); 15409 15410 try { 15411 bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 15412 width, height, quality); 15413 bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); 15414 if (autoScale) { 15415 mDrawingCache = bitmap; 15416 } else { 15417 mUnscaledDrawingCache = bitmap; 15418 } 15419 if (opaque && use32BitCache) bitmap.setHasAlpha(false); 15420 } catch (OutOfMemoryError e) { 15421 // If there is not enough memory to create the bitmap cache, just 15422 // ignore the issue as bitmap caches are not required to draw the 15423 // view hierarchy 15424 if (autoScale) { 15425 mDrawingCache = null; 15426 } else { 15427 mUnscaledDrawingCache = null; 15428 } 15429 mCachingFailed = true; 15430 return; 15431 } 15432 15433 clear = drawingCacheBackgroundColor != 0; 15434 } 15435 15436 Canvas canvas; 15437 if (attachInfo != null) { 15438 canvas = attachInfo.mCanvas; 15439 if (canvas == null) { 15440 canvas = new Canvas(); 15441 } 15442 canvas.setBitmap(bitmap); 15443 // Temporarily clobber the cached Canvas in case one of our children 15444 // is also using a drawing cache. Without this, the children would 15445 // steal the canvas by attaching their own bitmap to it and bad, bad 15446 // thing would happen (invisible views, corrupted drawings, etc.) 15447 attachInfo.mCanvas = null; 15448 } else { 15449 // This case should hopefully never or seldom happen 15450 canvas = new Canvas(bitmap); 15451 } 15452 15453 if (clear) { 15454 bitmap.eraseColor(drawingCacheBackgroundColor); 15455 } 15456 15457 computeScroll(); 15458 final int restoreCount = canvas.save(); 15459 15460 if (autoScale && scalingRequired) { 15461 final float scale = attachInfo.mApplicationScale; 15462 canvas.scale(scale, scale); 15463 } 15464 15465 canvas.translate(-mScrollX, -mScrollY); 15466 15467 mPrivateFlags |= PFLAG_DRAWN; 15468 if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || 15469 mLayerType != LAYER_TYPE_NONE) { 15470 mPrivateFlags |= PFLAG_DRAWING_CACHE_VALID; 15471 } 15472 15473 // Fast path for layouts with no backgrounds 15474 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 15475 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15476 dispatchDraw(canvas); 15477 if (mOverlay != null && !mOverlay.isEmpty()) { 15478 mOverlay.getOverlayView().draw(canvas); 15479 } 15480 } else { 15481 draw(canvas); 15482 } 15483 15484 canvas.restoreToCount(restoreCount); 15485 canvas.setBitmap(null); 15486 15487 if (attachInfo != null) { 15488 // Restore the cached Canvas for our siblings 15489 attachInfo.mCanvas = canvas; 15490 } 15491 } 15492 15493 /** 15494 * Create a snapshot of the view into a bitmap. We should probably make 15495 * some form of this public, but should think about the API. 15496 */ 15497 Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { 15498 int width = mRight - mLeft; 15499 int height = mBottom - mTop; 15500 15501 final AttachInfo attachInfo = mAttachInfo; 15502 final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; 15503 width = (int) ((width * scale) + 0.5f); 15504 height = (int) ((height * scale) + 0.5f); 15505 15506 Bitmap bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 15507 width > 0 ? width : 1, height > 0 ? height : 1, quality); 15508 if (bitmap == null) { 15509 throw new OutOfMemoryError(); 15510 } 15511 15512 Resources resources = getResources(); 15513 if (resources != null) { 15514 bitmap.setDensity(resources.getDisplayMetrics().densityDpi); 15515 } 15516 15517 Canvas canvas; 15518 if (attachInfo != null) { 15519 canvas = attachInfo.mCanvas; 15520 if (canvas == null) { 15521 canvas = new Canvas(); 15522 } 15523 canvas.setBitmap(bitmap); 15524 // Temporarily clobber the cached Canvas in case one of our children 15525 // is also using a drawing cache. Without this, the children would 15526 // steal the canvas by attaching their own bitmap to it and bad, bad 15527 // things would happen (invisible views, corrupted drawings, etc.) 15528 attachInfo.mCanvas = null; 15529 } else { 15530 // This case should hopefully never or seldom happen 15531 canvas = new Canvas(bitmap); 15532 } 15533 15534 if ((backgroundColor & 0xff000000) != 0) { 15535 bitmap.eraseColor(backgroundColor); 15536 } 15537 15538 computeScroll(); 15539 final int restoreCount = canvas.save(); 15540 canvas.scale(scale, scale); 15541 canvas.translate(-mScrollX, -mScrollY); 15542 15543 // Temporarily remove the dirty mask 15544 int flags = mPrivateFlags; 15545 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15546 15547 // Fast path for layouts with no backgrounds 15548 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 15549 dispatchDraw(canvas); 15550 if (mOverlay != null && !mOverlay.isEmpty()) { 15551 mOverlay.getOverlayView().draw(canvas); 15552 } 15553 } else { 15554 draw(canvas); 15555 } 15556 15557 mPrivateFlags = flags; 15558 15559 canvas.restoreToCount(restoreCount); 15560 canvas.setBitmap(null); 15561 15562 if (attachInfo != null) { 15563 // Restore the cached Canvas for our siblings 15564 attachInfo.mCanvas = canvas; 15565 } 15566 15567 return bitmap; 15568 } 15569 15570 /** 15571 * Indicates whether this View is currently in edit mode. A View is usually 15572 * in edit mode when displayed within a developer tool. For instance, if 15573 * this View is being drawn by a visual user interface builder, this method 15574 * should return true. 15575 * 15576 * Subclasses should check the return value of this method to provide 15577 * different behaviors if their normal behavior might interfere with the 15578 * host environment. For instance: the class spawns a thread in its 15579 * constructor, the drawing code relies on device-specific features, etc. 15580 * 15581 * This method is usually checked in the drawing code of custom widgets. 15582 * 15583 * @return True if this View is in edit mode, false otherwise. 15584 */ 15585 public boolean isInEditMode() { 15586 return false; 15587 } 15588 15589 /** 15590 * If the View draws content inside its padding and enables fading edges, 15591 * it needs to support padding offsets. Padding offsets are added to the 15592 * fading edges to extend the length of the fade so that it covers pixels 15593 * drawn inside the padding. 15594 * 15595 * Subclasses of this class should override this method if they need 15596 * to draw content inside the padding. 15597 * 15598 * @return True if padding offset must be applied, false otherwise. 15599 * 15600 * @see #getLeftPaddingOffset() 15601 * @see #getRightPaddingOffset() 15602 * @see #getTopPaddingOffset() 15603 * @see #getBottomPaddingOffset() 15604 * 15605 * @since CURRENT 15606 */ 15607 protected boolean isPaddingOffsetRequired() { 15608 return false; 15609 } 15610 15611 /** 15612 * Amount by which to extend the left fading region. Called only when 15613 * {@link #isPaddingOffsetRequired()} returns true. 15614 * 15615 * @return The left padding offset in pixels. 15616 * 15617 * @see #isPaddingOffsetRequired() 15618 * 15619 * @since CURRENT 15620 */ 15621 protected int getLeftPaddingOffset() { 15622 return 0; 15623 } 15624 15625 /** 15626 * Amount by which to extend the right fading region. Called only when 15627 * {@link #isPaddingOffsetRequired()} returns true. 15628 * 15629 * @return The right padding offset in pixels. 15630 * 15631 * @see #isPaddingOffsetRequired() 15632 * 15633 * @since CURRENT 15634 */ 15635 protected int getRightPaddingOffset() { 15636 return 0; 15637 } 15638 15639 /** 15640 * Amount by which to extend the top fading region. Called only when 15641 * {@link #isPaddingOffsetRequired()} returns true. 15642 * 15643 * @return The top padding offset in pixels. 15644 * 15645 * @see #isPaddingOffsetRequired() 15646 * 15647 * @since CURRENT 15648 */ 15649 protected int getTopPaddingOffset() { 15650 return 0; 15651 } 15652 15653 /** 15654 * Amount by which to extend the bottom fading region. Called only when 15655 * {@link #isPaddingOffsetRequired()} returns true. 15656 * 15657 * @return The bottom padding offset in pixels. 15658 * 15659 * @see #isPaddingOffsetRequired() 15660 * 15661 * @since CURRENT 15662 */ 15663 protected int getBottomPaddingOffset() { 15664 return 0; 15665 } 15666 15667 /** 15668 * @hide 15669 * @param offsetRequired 15670 */ 15671 protected int getFadeTop(boolean offsetRequired) { 15672 int top = mPaddingTop; 15673 if (offsetRequired) top += getTopPaddingOffset(); 15674 return top; 15675 } 15676 15677 /** 15678 * @hide 15679 * @param offsetRequired 15680 */ 15681 protected int getFadeHeight(boolean offsetRequired) { 15682 int padding = mPaddingTop; 15683 if (offsetRequired) padding += getTopPaddingOffset(); 15684 return mBottom - mTop - mPaddingBottom - padding; 15685 } 15686 15687 /** 15688 * <p>Indicates whether this view is attached to a hardware accelerated 15689 * window or not.</p> 15690 * 15691 * <p>Even if this method returns true, it does not mean that every call 15692 * to {@link #draw(android.graphics.Canvas)} will be made with an hardware 15693 * accelerated {@link android.graphics.Canvas}. For instance, if this view 15694 * is drawn onto an offscreen {@link android.graphics.Bitmap} and its 15695 * window is hardware accelerated, 15696 * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely 15697 * return false, and this method will return true.</p> 15698 * 15699 * @return True if the view is attached to a window and the window is 15700 * hardware accelerated; false in any other case. 15701 */ 15702 @ViewDebug.ExportedProperty(category = "drawing") 15703 public boolean isHardwareAccelerated() { 15704 return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 15705 } 15706 15707 /** 15708 * Sets a rectangular area on this view to which the view will be clipped 15709 * when it is drawn. Setting the value to null will remove the clip bounds 15710 * and the view will draw normally, using its full bounds. 15711 * 15712 * @param clipBounds The rectangular area, in the local coordinates of 15713 * this view, to which future drawing operations will be clipped. 15714 */ 15715 public void setClipBounds(Rect clipBounds) { 15716 if (clipBounds == mClipBounds 15717 || (clipBounds != null && clipBounds.equals(mClipBounds))) { 15718 return; 15719 } 15720 if (clipBounds != null) { 15721 if (mClipBounds == null) { 15722 mClipBounds = new Rect(clipBounds); 15723 } else { 15724 mClipBounds.set(clipBounds); 15725 } 15726 } else { 15727 mClipBounds = null; 15728 } 15729 mRenderNode.setClipBounds(mClipBounds); 15730 invalidateViewProperty(false, false); 15731 } 15732 15733 /** 15734 * Returns a copy of the current {@link #setClipBounds(Rect) clipBounds}. 15735 * 15736 * @return A copy of the current clip bounds if clip bounds are set, 15737 * otherwise null. 15738 */ 15739 public Rect getClipBounds() { 15740 return (mClipBounds != null) ? new Rect(mClipBounds) : null; 15741 } 15742 15743 15744 /** 15745 * Populates an output rectangle with the clip bounds of the view, 15746 * returning {@code true} if successful or {@code false} if the view's 15747 * clip bounds are {@code null}. 15748 * 15749 * @param outRect rectangle in which to place the clip bounds of the view 15750 * @return {@code true} if successful or {@code false} if the view's 15751 * clip bounds are {@code null} 15752 */ 15753 public boolean getClipBounds(Rect outRect) { 15754 if (mClipBounds != null) { 15755 outRect.set(mClipBounds); 15756 return true; 15757 } 15758 return false; 15759 } 15760 15761 /** 15762 * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common 15763 * case of an active Animation being run on the view. 15764 */ 15765 private boolean applyLegacyAnimation(ViewGroup parent, long drawingTime, 15766 Animation a, boolean scalingRequired) { 15767 Transformation invalidationTransform; 15768 final int flags = parent.mGroupFlags; 15769 final boolean initialized = a.isInitialized(); 15770 if (!initialized) { 15771 a.initialize(mRight - mLeft, mBottom - mTop, parent.getWidth(), parent.getHeight()); 15772 a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); 15773 if (mAttachInfo != null) a.setListenerHandler(mAttachInfo.mHandler); 15774 onAnimationStart(); 15775 } 15776 15777 final Transformation t = parent.getChildTransformation(); 15778 boolean more = a.getTransformation(drawingTime, t, 1f); 15779 if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { 15780 if (parent.mInvalidationTransformation == null) { 15781 parent.mInvalidationTransformation = new Transformation(); 15782 } 15783 invalidationTransform = parent.mInvalidationTransformation; 15784 a.getTransformation(drawingTime, invalidationTransform, 1f); 15785 } else { 15786 invalidationTransform = t; 15787 } 15788 15789 if (more) { 15790 if (!a.willChangeBounds()) { 15791 if ((flags & (ViewGroup.FLAG_OPTIMIZE_INVALIDATE | ViewGroup.FLAG_ANIMATION_DONE)) == 15792 ViewGroup.FLAG_OPTIMIZE_INVALIDATE) { 15793 parent.mGroupFlags |= ViewGroup.FLAG_INVALIDATE_REQUIRED; 15794 } else if ((flags & ViewGroup.FLAG_INVALIDATE_REQUIRED) == 0) { 15795 // The child need to draw an animation, potentially offscreen, so 15796 // make sure we do not cancel invalidate requests 15797 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 15798 parent.invalidate(mLeft, mTop, mRight, mBottom); 15799 } 15800 } else { 15801 if (parent.mInvalidateRegion == null) { 15802 parent.mInvalidateRegion = new RectF(); 15803 } 15804 final RectF region = parent.mInvalidateRegion; 15805 a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, 15806 invalidationTransform); 15807 15808 // The child need to draw an animation, potentially offscreen, so 15809 // make sure we do not cancel invalidate requests 15810 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 15811 15812 final int left = mLeft + (int) region.left; 15813 final int top = mTop + (int) region.top; 15814 parent.invalidate(left, top, left + (int) (region.width() + .5f), 15815 top + (int) (region.height() + .5f)); 15816 } 15817 } 15818 return more; 15819 } 15820 15821 /** 15822 * This method is called by getDisplayList() when a display list is recorded for a View. 15823 * It pushes any properties to the RenderNode that aren't managed by the RenderNode. 15824 */ 15825 void setDisplayListProperties(RenderNode renderNode) { 15826 if (renderNode != null) { 15827 renderNode.setHasOverlappingRendering(hasOverlappingRendering()); 15828 renderNode.setClipToBounds(mParent instanceof ViewGroup 15829 && ((ViewGroup) mParent).getClipChildren()); 15830 15831 float alpha = 1; 15832 if (mParent instanceof ViewGroup && (((ViewGroup) mParent).mGroupFlags & 15833 ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 15834 ViewGroup parentVG = (ViewGroup) mParent; 15835 final Transformation t = parentVG.getChildTransformation(); 15836 if (parentVG.getChildStaticTransformation(this, t)) { 15837 final int transformType = t.getTransformationType(); 15838 if (transformType != Transformation.TYPE_IDENTITY) { 15839 if ((transformType & Transformation.TYPE_ALPHA) != 0) { 15840 alpha = t.getAlpha(); 15841 } 15842 if ((transformType & Transformation.TYPE_MATRIX) != 0) { 15843 renderNode.setStaticMatrix(t.getMatrix()); 15844 } 15845 } 15846 } 15847 } 15848 if (mTransformationInfo != null) { 15849 alpha *= getFinalAlpha(); 15850 if (alpha < 1) { 15851 final int multipliedAlpha = (int) (255 * alpha); 15852 if (onSetAlpha(multipliedAlpha)) { 15853 alpha = 1; 15854 } 15855 } 15856 renderNode.setAlpha(alpha); 15857 } else if (alpha < 1) { 15858 renderNode.setAlpha(alpha); 15859 } 15860 } 15861 } 15862 15863 /** 15864 * This method is called by ViewGroup.drawChild() to have each child view draw itself. 15865 * 15866 * This is where the View specializes rendering behavior based on layer type, 15867 * and hardware acceleration. 15868 */ 15869 boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { 15870 final boolean hardwareAcceleratedCanvas = canvas.isHardwareAccelerated(); 15871 /* If an attached view draws to a HW canvas, it may use its RenderNode + DisplayList. 15872 * 15873 * If a view is dettached, its DisplayList shouldn't exist. If the canvas isn't 15874 * HW accelerated, it can't handle drawing RenderNodes. 15875 */ 15876 boolean drawingWithRenderNode = mAttachInfo != null 15877 && mAttachInfo.mHardwareAccelerated 15878 && hardwareAcceleratedCanvas; 15879 15880 boolean more = false; 15881 final boolean childHasIdentityMatrix = hasIdentityMatrix(); 15882 final int parentFlags = parent.mGroupFlags; 15883 15884 if ((parentFlags & ViewGroup.FLAG_CLEAR_TRANSFORMATION) != 0) { 15885 parent.getChildTransformation().clear(); 15886 parent.mGroupFlags &= ~ViewGroup.FLAG_CLEAR_TRANSFORMATION; 15887 } 15888 15889 Transformation transformToApply = null; 15890 boolean concatMatrix = false; 15891 final boolean scalingRequired = mAttachInfo != null && mAttachInfo.mScalingRequired; 15892 final Animation a = getAnimation(); 15893 if (a != null) { 15894 more = applyLegacyAnimation(parent, drawingTime, a, scalingRequired); 15895 concatMatrix = a.willChangeTransformationMatrix(); 15896 if (concatMatrix) { 15897 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 15898 } 15899 transformToApply = parent.getChildTransformation(); 15900 } else { 15901 if ((mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_TRANSFORM) != 0) { 15902 // No longer animating: clear out old animation matrix 15903 mRenderNode.setAnimationMatrix(null); 15904 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 15905 } 15906 if (!drawingWithRenderNode 15907 && (parentFlags & ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 15908 final Transformation t = parent.getChildTransformation(); 15909 final boolean hasTransform = parent.getChildStaticTransformation(this, t); 15910 if (hasTransform) { 15911 final int transformType = t.getTransformationType(); 15912 transformToApply = transformType != Transformation.TYPE_IDENTITY ? t : null; 15913 concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; 15914 } 15915 } 15916 } 15917 15918 concatMatrix |= !childHasIdentityMatrix; 15919 15920 // Sets the flag as early as possible to allow draw() implementations 15921 // to call invalidate() successfully when doing animations 15922 mPrivateFlags |= PFLAG_DRAWN; 15923 15924 if (!concatMatrix && 15925 (parentFlags & (ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS | 15926 ViewGroup.FLAG_CLIP_CHILDREN)) == ViewGroup.FLAG_CLIP_CHILDREN && 15927 canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && 15928 (mPrivateFlags & PFLAG_DRAW_ANIMATION) == 0) { 15929 mPrivateFlags2 |= PFLAG2_VIEW_QUICK_REJECTED; 15930 return more; 15931 } 15932 mPrivateFlags2 &= ~PFLAG2_VIEW_QUICK_REJECTED; 15933 15934 if (hardwareAcceleratedCanvas) { 15935 // Clear INVALIDATED flag to allow invalidation to occur during rendering, but 15936 // retain the flag's value temporarily in the mRecreateDisplayList flag 15937 mRecreateDisplayList = (mPrivateFlags & PFLAG_INVALIDATED) != 0; 15938 mPrivateFlags &= ~PFLAG_INVALIDATED; 15939 } 15940 15941 RenderNode renderNode = null; 15942 Bitmap cache = null; 15943 int layerType = getLayerType(); // TODO: signify cache state with just 'cache' local 15944 if (layerType == LAYER_TYPE_SOFTWARE 15945 || (!drawingWithRenderNode && layerType != LAYER_TYPE_NONE)) { 15946 // If not drawing with RenderNode, treat HW layers as SW 15947 layerType = LAYER_TYPE_SOFTWARE; 15948 buildDrawingCache(true); 15949 cache = getDrawingCache(true); 15950 } 15951 15952 if (drawingWithRenderNode) { 15953 // Delay getting the display list until animation-driven alpha values are 15954 // set up and possibly passed on to the view 15955 renderNode = updateDisplayListIfDirty(); 15956 if (!renderNode.isValid()) { 15957 // Uncommon, but possible. If a view is removed from the hierarchy during the call 15958 // to getDisplayList(), the display list will be marked invalid and we should not 15959 // try to use it again. 15960 renderNode = null; 15961 drawingWithRenderNode = false; 15962 } 15963 } 15964 15965 int sx = 0; 15966 int sy = 0; 15967 if (!drawingWithRenderNode) { 15968 computeScroll(); 15969 sx = mScrollX; 15970 sy = mScrollY; 15971 } 15972 15973 final boolean drawingWithDrawingCache = cache != null && !drawingWithRenderNode; 15974 final boolean offsetForScroll = cache == null && !drawingWithRenderNode; 15975 15976 int restoreTo = -1; 15977 if (!drawingWithRenderNode || transformToApply != null) { 15978 restoreTo = canvas.save(); 15979 } 15980 if (offsetForScroll) { 15981 canvas.translate(mLeft - sx, mTop - sy); 15982 } else { 15983 if (!drawingWithRenderNode) { 15984 canvas.translate(mLeft, mTop); 15985 } 15986 if (scalingRequired) { 15987 if (drawingWithRenderNode) { 15988 // TODO: Might not need this if we put everything inside the DL 15989 restoreTo = canvas.save(); 15990 } 15991 // mAttachInfo cannot be null, otherwise scalingRequired == false 15992 final float scale = 1.0f / mAttachInfo.mApplicationScale; 15993 canvas.scale(scale, scale); 15994 } 15995 } 15996 15997 float alpha = drawingWithRenderNode ? 1 : (getAlpha() * getTransitionAlpha()); 15998 if (transformToApply != null 15999 || alpha < 1 16000 || !hasIdentityMatrix() 16001 || (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) != 0) { 16002 if (transformToApply != null || !childHasIdentityMatrix) { 16003 int transX = 0; 16004 int transY = 0; 16005 16006 if (offsetForScroll) { 16007 transX = -sx; 16008 transY = -sy; 16009 } 16010 16011 if (transformToApply != null) { 16012 if (concatMatrix) { 16013 if (drawingWithRenderNode) { 16014 renderNode.setAnimationMatrix(transformToApply.getMatrix()); 16015 } else { 16016 // Undo the scroll translation, apply the transformation matrix, 16017 // then redo the scroll translate to get the correct result. 16018 canvas.translate(-transX, -transY); 16019 canvas.concat(transformToApply.getMatrix()); 16020 canvas.translate(transX, transY); 16021 } 16022 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 16023 } 16024 16025 float transformAlpha = transformToApply.getAlpha(); 16026 if (transformAlpha < 1) { 16027 alpha *= transformAlpha; 16028 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 16029 } 16030 } 16031 16032 if (!childHasIdentityMatrix && !drawingWithRenderNode) { 16033 canvas.translate(-transX, -transY); 16034 canvas.concat(getMatrix()); 16035 canvas.translate(transX, transY); 16036 } 16037 } 16038 16039 // Deal with alpha if it is or used to be <1 16040 if (alpha < 1 || (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) != 0) { 16041 if (alpha < 1) { 16042 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_ALPHA; 16043 } else { 16044 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_ALPHA; 16045 } 16046 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 16047 if (!drawingWithDrawingCache) { 16048 final int multipliedAlpha = (int) (255 * alpha); 16049 if (!onSetAlpha(multipliedAlpha)) { 16050 if (drawingWithRenderNode) { 16051 renderNode.setAlpha(alpha * getAlpha() * getTransitionAlpha()); 16052 } else if (layerType == LAYER_TYPE_NONE) { 16053 canvas.saveLayerAlpha(sx, sy, sx + getWidth(), sy + getHeight(), 16054 multipliedAlpha); 16055 } 16056 } else { 16057 // Alpha is handled by the child directly, clobber the layer's alpha 16058 mPrivateFlags |= PFLAG_ALPHA_SET; 16059 } 16060 } 16061 } 16062 } else if ((mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 16063 onSetAlpha(255); 16064 mPrivateFlags &= ~PFLAG_ALPHA_SET; 16065 } 16066 16067 if (!drawingWithRenderNode) { 16068 // apply clips directly, since RenderNode won't do it for this draw 16069 if ((parentFlags & ViewGroup.FLAG_CLIP_CHILDREN) != 0 && cache == null) { 16070 if (offsetForScroll) { 16071 canvas.clipRect(sx, sy, sx + getWidth(), sy + getHeight()); 16072 } else { 16073 if (!scalingRequired || cache == null) { 16074 canvas.clipRect(0, 0, getWidth(), getHeight()); 16075 } else { 16076 canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); 16077 } 16078 } 16079 } 16080 16081 if (mClipBounds != null) { 16082 // clip bounds ignore scroll 16083 canvas.clipRect(mClipBounds); 16084 } 16085 } 16086 16087 if (!drawingWithDrawingCache) { 16088 if (drawingWithRenderNode) { 16089 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 16090 ((DisplayListCanvas) canvas).drawRenderNode(renderNode); 16091 } else { 16092 // Fast path for layouts with no backgrounds 16093 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 16094 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 16095 dispatchDraw(canvas); 16096 } else { 16097 draw(canvas); 16098 } 16099 } 16100 } else if (cache != null) { 16101 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 16102 if (layerType == LAYER_TYPE_NONE) { 16103 // no layer paint, use temporary paint to draw bitmap 16104 Paint cachePaint = parent.mCachePaint; 16105 if (cachePaint == null) { 16106 cachePaint = new Paint(); 16107 cachePaint.setDither(false); 16108 parent.mCachePaint = cachePaint; 16109 } 16110 cachePaint.setAlpha((int) (alpha * 255)); 16111 canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); 16112 } else { 16113 // use layer paint to draw the bitmap, merging the two alphas, but also restore 16114 int layerPaintAlpha = mLayerPaint.getAlpha(); 16115 mLayerPaint.setAlpha((int) (alpha * layerPaintAlpha)); 16116 canvas.drawBitmap(cache, 0.0f, 0.0f, mLayerPaint); 16117 mLayerPaint.setAlpha(layerPaintAlpha); 16118 } 16119 } 16120 16121 if (restoreTo >= 0) { 16122 canvas.restoreToCount(restoreTo); 16123 } 16124 16125 if (a != null && !more) { 16126 if (!hardwareAcceleratedCanvas && !a.getFillAfter()) { 16127 onSetAlpha(255); 16128 } 16129 parent.finishAnimatingView(this, a); 16130 } 16131 16132 if (more && hardwareAcceleratedCanvas) { 16133 if (a.hasAlpha() && (mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 16134 // alpha animations should cause the child to recreate its display list 16135 invalidate(true); 16136 } 16137 } 16138 16139 mRecreateDisplayList = false; 16140 16141 return more; 16142 } 16143 16144 /** 16145 * Manually render this view (and all of its children) to the given Canvas. 16146 * The view must have already done a full layout before this function is 16147 * called. When implementing a view, implement 16148 * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. 16149 * If you do need to override this method, call the superclass version. 16150 * 16151 * @param canvas The Canvas to which the View is rendered. 16152 */ 16153 @CallSuper 16154 public void draw(Canvas canvas) { 16155 final int privateFlags = mPrivateFlags; 16156 final boolean dirtyOpaque = (privateFlags & PFLAG_DIRTY_MASK) == PFLAG_DIRTY_OPAQUE && 16157 (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); 16158 mPrivateFlags = (privateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN; 16159 16160 /* 16161 * Draw traversal performs several drawing steps which must be executed 16162 * in the appropriate order: 16163 * 16164 * 1. Draw the background 16165 * 2. If necessary, save the canvas' layers to prepare for fading 16166 * 3. Draw view's content 16167 * 4. Draw children 16168 * 5. If necessary, draw the fading edges and restore layers 16169 * 6. Draw decorations (scrollbars for instance) 16170 */ 16171 16172 // Step 1, draw the background, if needed 16173 int saveCount; 16174 16175 if (!dirtyOpaque) { 16176 drawBackground(canvas); 16177 } 16178 16179 // skip step 2 & 5 if possible (common case) 16180 final int viewFlags = mViewFlags; 16181 boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; 16182 boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; 16183 if (!verticalEdges && !horizontalEdges) { 16184 // Step 3, draw the content 16185 if (!dirtyOpaque) onDraw(canvas); 16186 16187 // Step 4, draw the children 16188 dispatchDraw(canvas); 16189 16190 // Overlay is part of the content and draws beneath Foreground 16191 if (mOverlay != null && !mOverlay.isEmpty()) { 16192 mOverlay.getOverlayView().dispatchDraw(canvas); 16193 } 16194 16195 // Step 6, draw decorations (foreground, scrollbars) 16196 onDrawForeground(canvas); 16197 16198 // we're done... 16199 return; 16200 } 16201 16202 /* 16203 * Here we do the full fledged routine... 16204 * (this is an uncommon case where speed matters less, 16205 * this is why we repeat some of the tests that have been 16206 * done above) 16207 */ 16208 16209 boolean drawTop = false; 16210 boolean drawBottom = false; 16211 boolean drawLeft = false; 16212 boolean drawRight = false; 16213 16214 float topFadeStrength = 0.0f; 16215 float bottomFadeStrength = 0.0f; 16216 float leftFadeStrength = 0.0f; 16217 float rightFadeStrength = 0.0f; 16218 16219 // Step 2, save the canvas' layers 16220 int paddingLeft = mPaddingLeft; 16221 16222 final boolean offsetRequired = isPaddingOffsetRequired(); 16223 if (offsetRequired) { 16224 paddingLeft += getLeftPaddingOffset(); 16225 } 16226 16227 int left = mScrollX + paddingLeft; 16228 int right = left + mRight - mLeft - mPaddingRight - paddingLeft; 16229 int top = mScrollY + getFadeTop(offsetRequired); 16230 int bottom = top + getFadeHeight(offsetRequired); 16231 16232 if (offsetRequired) { 16233 right += getRightPaddingOffset(); 16234 bottom += getBottomPaddingOffset(); 16235 } 16236 16237 final ScrollabilityCache scrollabilityCache = mScrollCache; 16238 final float fadeHeight = scrollabilityCache.fadingEdgeLength; 16239 int length = (int) fadeHeight; 16240 16241 // clip the fade length if top and bottom fades overlap 16242 // overlapping fades produce odd-looking artifacts 16243 if (verticalEdges && (top + length > bottom - length)) { 16244 length = (bottom - top) / 2; 16245 } 16246 16247 // also clip horizontal fades if necessary 16248 if (horizontalEdges && (left + length > right - length)) { 16249 length = (right - left) / 2; 16250 } 16251 16252 if (verticalEdges) { 16253 topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); 16254 drawTop = topFadeStrength * fadeHeight > 1.0f; 16255 bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); 16256 drawBottom = bottomFadeStrength * fadeHeight > 1.0f; 16257 } 16258 16259 if (horizontalEdges) { 16260 leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); 16261 drawLeft = leftFadeStrength * fadeHeight > 1.0f; 16262 rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); 16263 drawRight = rightFadeStrength * fadeHeight > 1.0f; 16264 } 16265 16266 saveCount = canvas.getSaveCount(); 16267 16268 int solidColor = getSolidColor(); 16269 if (solidColor == 0) { 16270 final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 16271 16272 if (drawTop) { 16273 canvas.saveLayer(left, top, right, top + length, null, flags); 16274 } 16275 16276 if (drawBottom) { 16277 canvas.saveLayer(left, bottom - length, right, bottom, null, flags); 16278 } 16279 16280 if (drawLeft) { 16281 canvas.saveLayer(left, top, left + length, bottom, null, flags); 16282 } 16283 16284 if (drawRight) { 16285 canvas.saveLayer(right - length, top, right, bottom, null, flags); 16286 } 16287 } else { 16288 scrollabilityCache.setFadeColor(solidColor); 16289 } 16290 16291 // Step 3, draw the content 16292 if (!dirtyOpaque) onDraw(canvas); 16293 16294 // Step 4, draw the children 16295 dispatchDraw(canvas); 16296 16297 // Step 5, draw the fade effect and restore layers 16298 final Paint p = scrollabilityCache.paint; 16299 final Matrix matrix = scrollabilityCache.matrix; 16300 final Shader fade = scrollabilityCache.shader; 16301 16302 if (drawTop) { 16303 matrix.setScale(1, fadeHeight * topFadeStrength); 16304 matrix.postTranslate(left, top); 16305 fade.setLocalMatrix(matrix); 16306 p.setShader(fade); 16307 canvas.drawRect(left, top, right, top + length, p); 16308 } 16309 16310 if (drawBottom) { 16311 matrix.setScale(1, fadeHeight * bottomFadeStrength); 16312 matrix.postRotate(180); 16313 matrix.postTranslate(left, bottom); 16314 fade.setLocalMatrix(matrix); 16315 p.setShader(fade); 16316 canvas.drawRect(left, bottom - length, right, bottom, p); 16317 } 16318 16319 if (drawLeft) { 16320 matrix.setScale(1, fadeHeight * leftFadeStrength); 16321 matrix.postRotate(-90); 16322 matrix.postTranslate(left, top); 16323 fade.setLocalMatrix(matrix); 16324 p.setShader(fade); 16325 canvas.drawRect(left, top, left + length, bottom, p); 16326 } 16327 16328 if (drawRight) { 16329 matrix.setScale(1, fadeHeight * rightFadeStrength); 16330 matrix.postRotate(90); 16331 matrix.postTranslate(right, top); 16332 fade.setLocalMatrix(matrix); 16333 p.setShader(fade); 16334 canvas.drawRect(right - length, top, right, bottom, p); 16335 } 16336 16337 canvas.restoreToCount(saveCount); 16338 16339 // Overlay is part of the content and draws beneath Foreground 16340 if (mOverlay != null && !mOverlay.isEmpty()) { 16341 mOverlay.getOverlayView().dispatchDraw(canvas); 16342 } 16343 16344 // Step 6, draw decorations (foreground, scrollbars) 16345 onDrawForeground(canvas); 16346 } 16347 16348 /** 16349 * Draws the background onto the specified canvas. 16350 * 16351 * @param canvas Canvas on which to draw the background 16352 */ 16353 private void drawBackground(Canvas canvas) { 16354 final Drawable background = mBackground; 16355 if (background == null) { 16356 return; 16357 } 16358 16359 setBackgroundBounds(); 16360 16361 // Attempt to use a display list if requested. 16362 if (canvas.isHardwareAccelerated() && mAttachInfo != null 16363 && mAttachInfo.mHardwareRenderer != null) { 16364 mBackgroundRenderNode = getDrawableRenderNode(background, mBackgroundRenderNode); 16365 16366 final RenderNode renderNode = mBackgroundRenderNode; 16367 if (renderNode != null && renderNode.isValid()) { 16368 setBackgroundRenderNodeProperties(renderNode); 16369 ((DisplayListCanvas) canvas).drawRenderNode(renderNode); 16370 return; 16371 } 16372 } 16373 16374 final int scrollX = mScrollX; 16375 final int scrollY = mScrollY; 16376 if ((scrollX | scrollY) == 0) { 16377 background.draw(canvas); 16378 } else { 16379 canvas.translate(scrollX, scrollY); 16380 background.draw(canvas); 16381 canvas.translate(-scrollX, -scrollY); 16382 } 16383 } 16384 16385 /** 16386 * Sets the correct background bounds and rebuilds the outline, if needed. 16387 * <p/> 16388 * This is called by LayoutLib. 16389 */ 16390 void setBackgroundBounds() { 16391 if (mBackgroundSizeChanged && mBackground != null) { 16392 mBackground.setBounds(0, 0, mRight - mLeft, mBottom - mTop); 16393 mBackgroundSizeChanged = false; 16394 rebuildOutline(); 16395 } 16396 } 16397 16398 private void setBackgroundRenderNodeProperties(RenderNode renderNode) { 16399 renderNode.setTranslationX(mScrollX); 16400 renderNode.setTranslationY(mScrollY); 16401 } 16402 16403 /** 16404 * Creates a new display list or updates the existing display list for the 16405 * specified Drawable. 16406 * 16407 * @param drawable Drawable for which to create a display list 16408 * @param renderNode Existing RenderNode, or {@code null} 16409 * @return A valid display list for the specified drawable 16410 */ 16411 private RenderNode getDrawableRenderNode(Drawable drawable, RenderNode renderNode) { 16412 if (renderNode == null) { 16413 renderNode = RenderNode.create(drawable.getClass().getName(), this); 16414 } 16415 16416 final Rect bounds = drawable.getBounds(); 16417 final int width = bounds.width(); 16418 final int height = bounds.height(); 16419 final DisplayListCanvas canvas = renderNode.start(width, height); 16420 16421 // Reverse left/top translation done by drawable canvas, which will 16422 // instead be applied by rendernode's LTRB bounds below. This way, the 16423 // drawable's bounds match with its rendernode bounds and its content 16424 // will lie within those bounds in the rendernode tree. 16425 canvas.translate(-bounds.left, -bounds.top); 16426 16427 try { 16428 drawable.draw(canvas); 16429 } finally { 16430 renderNode.end(canvas); 16431 } 16432 16433 // Set up drawable properties that are view-independent. 16434 renderNode.setLeftTopRightBottom(bounds.left, bounds.top, bounds.right, bounds.bottom); 16435 renderNode.setProjectBackwards(drawable.isProjected()); 16436 renderNode.setProjectionReceiver(true); 16437 renderNode.setClipToBounds(false); 16438 return renderNode; 16439 } 16440 16441 /** 16442 * Returns the overlay for this view, creating it if it does not yet exist. 16443 * Adding drawables to the overlay will cause them to be displayed whenever 16444 * the view itself is redrawn. Objects in the overlay should be actively 16445 * managed: remove them when they should not be displayed anymore. The 16446 * overlay will always have the same size as its host view. 16447 * 16448 * <p>Note: Overlays do not currently work correctly with {@link 16449 * SurfaceView} or {@link TextureView}; contents in overlays for these 16450 * types of views may not display correctly.</p> 16451 * 16452 * @return The ViewOverlay object for this view. 16453 * @see ViewOverlay 16454 */ 16455 public ViewOverlay getOverlay() { 16456 if (mOverlay == null) { 16457 mOverlay = new ViewOverlay(mContext, this); 16458 } 16459 return mOverlay; 16460 } 16461 16462 /** 16463 * Override this if your view is known to always be drawn on top of a solid color background, 16464 * and needs to draw fading edges. Returning a non-zero color enables the view system to 16465 * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha 16466 * should be set to 0xFF. 16467 * 16468 * @see #setVerticalFadingEdgeEnabled(boolean) 16469 * @see #setHorizontalFadingEdgeEnabled(boolean) 16470 * 16471 * @return The known solid color background for this view, or 0 if the color may vary 16472 */ 16473 @ViewDebug.ExportedProperty(category = "drawing") 16474 @ColorInt 16475 public int getSolidColor() { 16476 return 0; 16477 } 16478 16479 /** 16480 * Build a human readable string representation of the specified view flags. 16481 * 16482 * @param flags the view flags to convert to a string 16483 * @return a String representing the supplied flags 16484 */ 16485 private static String printFlags(int flags) { 16486 String output = ""; 16487 int numFlags = 0; 16488 if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { 16489 output += "TAKES_FOCUS"; 16490 numFlags++; 16491 } 16492 16493 switch (flags & VISIBILITY_MASK) { 16494 case INVISIBLE: 16495 if (numFlags > 0) { 16496 output += " "; 16497 } 16498 output += "INVISIBLE"; 16499 // USELESS HERE numFlags++; 16500 break; 16501 case GONE: 16502 if (numFlags > 0) { 16503 output += " "; 16504 } 16505 output += "GONE"; 16506 // USELESS HERE numFlags++; 16507 break; 16508 default: 16509 break; 16510 } 16511 return output; 16512 } 16513 16514 /** 16515 * Build a human readable string representation of the specified private 16516 * view flags. 16517 * 16518 * @param privateFlags the private view flags to convert to a string 16519 * @return a String representing the supplied flags 16520 */ 16521 private static String printPrivateFlags(int privateFlags) { 16522 String output = ""; 16523 int numFlags = 0; 16524 16525 if ((privateFlags & PFLAG_WANTS_FOCUS) == PFLAG_WANTS_FOCUS) { 16526 output += "WANTS_FOCUS"; 16527 numFlags++; 16528 } 16529 16530 if ((privateFlags & PFLAG_FOCUSED) == PFLAG_FOCUSED) { 16531 if (numFlags > 0) { 16532 output += " "; 16533 } 16534 output += "FOCUSED"; 16535 numFlags++; 16536 } 16537 16538 if ((privateFlags & PFLAG_SELECTED) == PFLAG_SELECTED) { 16539 if (numFlags > 0) { 16540 output += " "; 16541 } 16542 output += "SELECTED"; 16543 numFlags++; 16544 } 16545 16546 if ((privateFlags & PFLAG_IS_ROOT_NAMESPACE) == PFLAG_IS_ROOT_NAMESPACE) { 16547 if (numFlags > 0) { 16548 output += " "; 16549 } 16550 output += "IS_ROOT_NAMESPACE"; 16551 numFlags++; 16552 } 16553 16554 if ((privateFlags & PFLAG_HAS_BOUNDS) == PFLAG_HAS_BOUNDS) { 16555 if (numFlags > 0) { 16556 output += " "; 16557 } 16558 output += "HAS_BOUNDS"; 16559 numFlags++; 16560 } 16561 16562 if ((privateFlags & PFLAG_DRAWN) == PFLAG_DRAWN) { 16563 if (numFlags > 0) { 16564 output += " "; 16565 } 16566 output += "DRAWN"; 16567 // USELESS HERE numFlags++; 16568 } 16569 return output; 16570 } 16571 16572 /** 16573 * <p>Indicates whether or not this view's layout will be requested during 16574 * the next hierarchy layout pass.</p> 16575 * 16576 * @return true if the layout will be forced during next layout pass 16577 */ 16578 public boolean isLayoutRequested() { 16579 return (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; 16580 } 16581 16582 /** 16583 * Return true if o is a ViewGroup that is laying out using optical bounds. 16584 * @hide 16585 */ 16586 public static boolean isLayoutModeOptical(Object o) { 16587 return o instanceof ViewGroup && ((ViewGroup) o).isLayoutModeOptical(); 16588 } 16589 16590 private boolean setOpticalFrame(int left, int top, int right, int bottom) { 16591 Insets parentInsets = mParent instanceof View ? 16592 ((View) mParent).getOpticalInsets() : Insets.NONE; 16593 Insets childInsets = getOpticalInsets(); 16594 return setFrame( 16595 left + parentInsets.left - childInsets.left, 16596 top + parentInsets.top - childInsets.top, 16597 right + parentInsets.left + childInsets.right, 16598 bottom + parentInsets.top + childInsets.bottom); 16599 } 16600 16601 /** 16602 * Assign a size and position to a view and all of its 16603 * descendants 16604 * 16605 * <p>This is the second phase of the layout mechanism. 16606 * (The first is measuring). In this phase, each parent calls 16607 * layout on all of its children to position them. 16608 * This is typically done using the child measurements 16609 * that were stored in the measure pass().</p> 16610 * 16611 * <p>Derived classes should not override this method. 16612 * Derived classes with children should override 16613 * onLayout. In that method, they should 16614 * call layout on each of their children.</p> 16615 * 16616 * @param l Left position, relative to parent 16617 * @param t Top position, relative to parent 16618 * @param r Right position, relative to parent 16619 * @param b Bottom position, relative to parent 16620 */ 16621 @SuppressWarnings({"unchecked"}) 16622 public void layout(int l, int t, int r, int b) { 16623 if ((mPrivateFlags3 & PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT) != 0) { 16624 onMeasure(mOldWidthMeasureSpec, mOldHeightMeasureSpec); 16625 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 16626 } 16627 16628 int oldL = mLeft; 16629 int oldT = mTop; 16630 int oldB = mBottom; 16631 int oldR = mRight; 16632 16633 boolean changed = isLayoutModeOptical(mParent) ? 16634 setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b); 16635 16636 if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) { 16637 onLayout(changed, l, t, r, b); 16638 mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED; 16639 16640 ListenerInfo li = mListenerInfo; 16641 if (li != null && li.mOnLayoutChangeListeners != null) { 16642 ArrayList<OnLayoutChangeListener> listenersCopy = 16643 (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone(); 16644 int numListeners = listenersCopy.size(); 16645 for (int i = 0; i < numListeners; ++i) { 16646 listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); 16647 } 16648 } 16649 } 16650 16651 mPrivateFlags &= ~PFLAG_FORCE_LAYOUT; 16652 mPrivateFlags3 |= PFLAG3_IS_LAID_OUT; 16653 } 16654 16655 /** 16656 * Called from layout when this view should 16657 * assign a size and position to each of its children. 16658 * 16659 * Derived classes with children should override 16660 * this method and call layout on each of 16661 * their children. 16662 * @param changed This is a new size or position for this view 16663 * @param left Left position, relative to parent 16664 * @param top Top position, relative to parent 16665 * @param right Right position, relative to parent 16666 * @param bottom Bottom position, relative to parent 16667 */ 16668 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 16669 } 16670 16671 /** 16672 * Assign a size and position to this view. 16673 * 16674 * This is called from layout. 16675 * 16676 * @param left Left position, relative to parent 16677 * @param top Top position, relative to parent 16678 * @param right Right position, relative to parent 16679 * @param bottom Bottom position, relative to parent 16680 * @return true if the new size and position are different than the 16681 * previous ones 16682 * {@hide} 16683 */ 16684 protected boolean setFrame(int left, int top, int right, int bottom) { 16685 boolean changed = false; 16686 16687 if (DBG) { 16688 Log.d("View", this + " View.setFrame(" + left + "," + top + "," 16689 + right + "," + bottom + ")"); 16690 } 16691 16692 if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { 16693 changed = true; 16694 16695 // Remember our drawn bit 16696 int drawn = mPrivateFlags & PFLAG_DRAWN; 16697 16698 int oldWidth = mRight - mLeft; 16699 int oldHeight = mBottom - mTop; 16700 int newWidth = right - left; 16701 int newHeight = bottom - top; 16702 boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); 16703 16704 // Invalidate our old position 16705 invalidate(sizeChanged); 16706 16707 mLeft = left; 16708 mTop = top; 16709 mRight = right; 16710 mBottom = bottom; 16711 mRenderNode.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 16712 16713 mPrivateFlags |= PFLAG_HAS_BOUNDS; 16714 16715 16716 if (sizeChanged) { 16717 sizeChange(newWidth, newHeight, oldWidth, oldHeight); 16718 } 16719 16720 if ((mViewFlags & VISIBILITY_MASK) == VISIBLE || mGhostView != null) { 16721 // If we are visible, force the DRAWN bit to on so that 16722 // this invalidate will go through (at least to our parent). 16723 // This is because someone may have invalidated this view 16724 // before this call to setFrame came in, thereby clearing 16725 // the DRAWN bit. 16726 mPrivateFlags |= PFLAG_DRAWN; 16727 invalidate(sizeChanged); 16728 // parent display list may need to be recreated based on a change in the bounds 16729 // of any child 16730 invalidateParentCaches(); 16731 } 16732 16733 // Reset drawn bit to original value (invalidate turns it off) 16734 mPrivateFlags |= drawn; 16735 16736 mBackgroundSizeChanged = true; 16737 if (mForegroundInfo != null) { 16738 mForegroundInfo.mBoundsChanged = true; 16739 } 16740 16741 notifySubtreeAccessibilityStateChangedIfNeeded(); 16742 } 16743 return changed; 16744 } 16745 16746 /** 16747 * Same as setFrame, but public and hidden. For use in {@link android.transition.ChangeBounds}. 16748 * @hide 16749 */ 16750 public void setLeftTopRightBottom(int left, int top, int right, int bottom) { 16751 setFrame(left, top, right, bottom); 16752 } 16753 16754 private void sizeChange(int newWidth, int newHeight, int oldWidth, int oldHeight) { 16755 onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); 16756 if (mOverlay != null) { 16757 mOverlay.getOverlayView().setRight(newWidth); 16758 mOverlay.getOverlayView().setBottom(newHeight); 16759 } 16760 rebuildOutline(); 16761 } 16762 16763 /** 16764 * Finalize inflating a view from XML. This is called as the last phase 16765 * of inflation, after all child views have been added. 16766 * 16767 * <p>Even if the subclass overrides onFinishInflate, they should always be 16768 * sure to call the super method, so that we get called. 16769 */ 16770 @CallSuper 16771 protected void onFinishInflate() { 16772 } 16773 16774 /** 16775 * Returns the resources associated with this view. 16776 * 16777 * @return Resources object. 16778 */ 16779 public Resources getResources() { 16780 return mResources; 16781 } 16782 16783 /** 16784 * Invalidates the specified Drawable. 16785 * 16786 * @param drawable the drawable to invalidate 16787 */ 16788 @Override 16789 public void invalidateDrawable(@NonNull Drawable drawable) { 16790 if (verifyDrawable(drawable)) { 16791 final Rect dirty = drawable.getDirtyBounds(); 16792 final int scrollX = mScrollX; 16793 final int scrollY = mScrollY; 16794 16795 invalidate(dirty.left + scrollX, dirty.top + scrollY, 16796 dirty.right + scrollX, dirty.bottom + scrollY); 16797 rebuildOutline(); 16798 } 16799 } 16800 16801 /** 16802 * Schedules an action on a drawable to occur at a specified time. 16803 * 16804 * @param who the recipient of the action 16805 * @param what the action to run on the drawable 16806 * @param when the time at which the action must occur. Uses the 16807 * {@link SystemClock#uptimeMillis} timebase. 16808 */ 16809 @Override 16810 public void scheduleDrawable(Drawable who, Runnable what, long when) { 16811 if (verifyDrawable(who) && what != null) { 16812 final long delay = when - SystemClock.uptimeMillis(); 16813 if (mAttachInfo != null) { 16814 mAttachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 16815 Choreographer.CALLBACK_ANIMATION, what, who, 16816 Choreographer.subtractFrameDelay(delay)); 16817 } else { 16818 ViewRootImpl.getRunQueue().postDelayed(what, delay); 16819 } 16820 } 16821 } 16822 16823 /** 16824 * Cancels a scheduled action on a drawable. 16825 * 16826 * @param who the recipient of the action 16827 * @param what the action to cancel 16828 */ 16829 @Override 16830 public void unscheduleDrawable(Drawable who, Runnable what) { 16831 if (verifyDrawable(who) && what != null) { 16832 if (mAttachInfo != null) { 16833 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 16834 Choreographer.CALLBACK_ANIMATION, what, who); 16835 } 16836 ViewRootImpl.getRunQueue().removeCallbacks(what); 16837 } 16838 } 16839 16840 /** 16841 * Unschedule any events associated with the given Drawable. This can be 16842 * used when selecting a new Drawable into a view, so that the previous 16843 * one is completely unscheduled. 16844 * 16845 * @param who The Drawable to unschedule. 16846 * 16847 * @see #drawableStateChanged 16848 */ 16849 public void unscheduleDrawable(Drawable who) { 16850 if (mAttachInfo != null && who != null) { 16851 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 16852 Choreographer.CALLBACK_ANIMATION, null, who); 16853 } 16854 } 16855 16856 /** 16857 * Resolve the Drawables depending on the layout direction. This is implicitly supposing 16858 * that the View directionality can and will be resolved before its Drawables. 16859 * 16860 * Will call {@link View#onResolveDrawables} when resolution is done. 16861 * 16862 * @hide 16863 */ 16864 protected void resolveDrawables() { 16865 // Drawables resolution may need to happen before resolving the layout direction (which is 16866 // done only during the measure() call). 16867 // If the layout direction is not resolved yet, we cannot resolve the Drawables except in 16868 // one case: when the raw layout direction has not been defined as LAYOUT_DIRECTION_INHERIT. 16869 // So, if the raw layout direction is LAYOUT_DIRECTION_LTR or LAYOUT_DIRECTION_RTL or 16870 // LAYOUT_DIRECTION_LOCALE, we can "cheat" and we don't need to wait for the layout 16871 // direction to be resolved as its resolved value will be the same as its raw value. 16872 if (!isLayoutDirectionResolved() && 16873 getRawLayoutDirection() == View.LAYOUT_DIRECTION_INHERIT) { 16874 return; 16875 } 16876 16877 final int layoutDirection = isLayoutDirectionResolved() ? 16878 getLayoutDirection() : getRawLayoutDirection(); 16879 16880 if (mBackground != null) { 16881 mBackground.setLayoutDirection(layoutDirection); 16882 } 16883 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { 16884 mForegroundInfo.mDrawable.setLayoutDirection(layoutDirection); 16885 } 16886 mPrivateFlags2 |= PFLAG2_DRAWABLE_RESOLVED; 16887 onResolveDrawables(layoutDirection); 16888 } 16889 16890 boolean areDrawablesResolved() { 16891 return (mPrivateFlags2 & PFLAG2_DRAWABLE_RESOLVED) == PFLAG2_DRAWABLE_RESOLVED; 16892 } 16893 16894 /** 16895 * Called when layout direction has been resolved. 16896 * 16897 * The default implementation does nothing. 16898 * 16899 * @param layoutDirection The resolved layout direction. 16900 * 16901 * @see #LAYOUT_DIRECTION_LTR 16902 * @see #LAYOUT_DIRECTION_RTL 16903 * 16904 * @hide 16905 */ 16906 public void onResolveDrawables(@ResolvedLayoutDir int layoutDirection) { 16907 } 16908 16909 /** 16910 * @hide 16911 */ 16912 protected void resetResolvedDrawables() { 16913 resetResolvedDrawablesInternal(); 16914 } 16915 16916 void resetResolvedDrawablesInternal() { 16917 mPrivateFlags2 &= ~PFLAG2_DRAWABLE_RESOLVED; 16918 } 16919 16920 /** 16921 * If your view subclass is displaying its own Drawable objects, it should 16922 * override this function and return true for any Drawable it is 16923 * displaying. This allows animations for those drawables to be 16924 * scheduled. 16925 * 16926 * <p>Be sure to call through to the super class when overriding this 16927 * function. 16928 * 16929 * @param who The Drawable to verify. Return true if it is one you are 16930 * displaying, else return the result of calling through to the 16931 * super class. 16932 * 16933 * @return boolean If true than the Drawable is being displayed in the 16934 * view; else false and it is not allowed to animate. 16935 * 16936 * @see #unscheduleDrawable(android.graphics.drawable.Drawable) 16937 * @see #drawableStateChanged() 16938 */ 16939 @CallSuper 16940 protected boolean verifyDrawable(Drawable who) { 16941 return who == mBackground || (mScrollCache != null && mScrollCache.scrollBar == who) 16942 || (mForegroundInfo != null && mForegroundInfo.mDrawable == who); 16943 } 16944 16945 /** 16946 * This function is called whenever the state of the view changes in such 16947 * a way that it impacts the state of drawables being shown. 16948 * <p> 16949 * If the View has a StateListAnimator, it will also be called to run necessary state 16950 * change animations. 16951 * <p> 16952 * Be sure to call through to the superclass when overriding this function. 16953 * 16954 * @see Drawable#setState(int[]) 16955 */ 16956 @CallSuper 16957 protected void drawableStateChanged() { 16958 final int[] state = getDrawableState(); 16959 16960 final Drawable bg = mBackground; 16961 if (bg != null && bg.isStateful()) { 16962 bg.setState(state); 16963 } 16964 16965 final Drawable fg = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 16966 if (fg != null && fg.isStateful()) { 16967 fg.setState(state); 16968 } 16969 16970 if (mScrollCache != null) { 16971 final Drawable scrollBar = mScrollCache.scrollBar; 16972 if (scrollBar != null && scrollBar.isStateful()) { 16973 scrollBar.setState(state); 16974 } 16975 } 16976 16977 if (mStateListAnimator != null) { 16978 mStateListAnimator.setState(state); 16979 } 16980 } 16981 16982 /** 16983 * This function is called whenever the view hotspot changes and needs to 16984 * be propagated to drawables or child views managed by the view. 16985 * <p> 16986 * Dispatching to child views is handled by 16987 * {@link #dispatchDrawableHotspotChanged(float, float)}. 16988 * <p> 16989 * Be sure to call through to the superclass when overriding this function. 16990 * 16991 * @param x hotspot x coordinate 16992 * @param y hotspot y coordinate 16993 */ 16994 @CallSuper 16995 public void drawableHotspotChanged(float x, float y) { 16996 if (mBackground != null) { 16997 mBackground.setHotspot(x, y); 16998 } 16999 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { 17000 mForegroundInfo.mDrawable.setHotspot(x, y); 17001 } 17002 17003 dispatchDrawableHotspotChanged(x, y); 17004 } 17005 17006 /** 17007 * Dispatches drawableHotspotChanged to all of this View's children. 17008 * 17009 * @param x hotspot x coordinate 17010 * @param y hotspot y coordinate 17011 * @see #drawableHotspotChanged(float, float) 17012 */ 17013 public void dispatchDrawableHotspotChanged(float x, float y) { 17014 } 17015 17016 /** 17017 * Call this to force a view to update its drawable state. This will cause 17018 * drawableStateChanged to be called on this view. Views that are interested 17019 * in the new state should call getDrawableState. 17020 * 17021 * @see #drawableStateChanged 17022 * @see #getDrawableState 17023 */ 17024 public void refreshDrawableState() { 17025 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 17026 drawableStateChanged(); 17027 17028 ViewParent parent = mParent; 17029 if (parent != null) { 17030 parent.childDrawableStateChanged(this); 17031 } 17032 } 17033 17034 /** 17035 * Return an array of resource IDs of the drawable states representing the 17036 * current state of the view. 17037 * 17038 * @return The current drawable state 17039 * 17040 * @see Drawable#setState(int[]) 17041 * @see #drawableStateChanged() 17042 * @see #onCreateDrawableState(int) 17043 */ 17044 public final int[] getDrawableState() { 17045 if ((mDrawableState != null) && ((mPrivateFlags & PFLAG_DRAWABLE_STATE_DIRTY) == 0)) { 17046 return mDrawableState; 17047 } else { 17048 mDrawableState = onCreateDrawableState(0); 17049 mPrivateFlags &= ~PFLAG_DRAWABLE_STATE_DIRTY; 17050 return mDrawableState; 17051 } 17052 } 17053 17054 /** 17055 * Generate the new {@link android.graphics.drawable.Drawable} state for 17056 * this view. This is called by the view 17057 * system when the cached Drawable state is determined to be invalid. To 17058 * retrieve the current state, you should use {@link #getDrawableState}. 17059 * 17060 * @param extraSpace if non-zero, this is the number of extra entries you 17061 * would like in the returned array in which you can place your own 17062 * states. 17063 * 17064 * @return Returns an array holding the current {@link Drawable} state of 17065 * the view. 17066 * 17067 * @see #mergeDrawableStates(int[], int[]) 17068 */ 17069 protected int[] onCreateDrawableState(int extraSpace) { 17070 if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && 17071 mParent instanceof View) { 17072 return ((View) mParent).onCreateDrawableState(extraSpace); 17073 } 17074 17075 int[] drawableState; 17076 17077 int privateFlags = mPrivateFlags; 17078 17079 int viewStateIndex = 0; 17080 if ((privateFlags & PFLAG_PRESSED) != 0) viewStateIndex |= StateSet.VIEW_STATE_PRESSED; 17081 if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= StateSet.VIEW_STATE_ENABLED; 17082 if (isFocused()) viewStateIndex |= StateSet.VIEW_STATE_FOCUSED; 17083 if ((privateFlags & PFLAG_SELECTED) != 0) viewStateIndex |= StateSet.VIEW_STATE_SELECTED; 17084 if (hasWindowFocus()) viewStateIndex |= StateSet.VIEW_STATE_WINDOW_FOCUSED; 17085 if ((privateFlags & PFLAG_ACTIVATED) != 0) viewStateIndex |= StateSet.VIEW_STATE_ACTIVATED; 17086 if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && 17087 HardwareRenderer.isAvailable()) { 17088 // This is set if HW acceleration is requested, even if the current 17089 // process doesn't allow it. This is just to allow app preview 17090 // windows to better match their app. 17091 viewStateIndex |= StateSet.VIEW_STATE_ACCELERATED; 17092 } 17093 if ((privateFlags & PFLAG_HOVERED) != 0) viewStateIndex |= StateSet.VIEW_STATE_HOVERED; 17094 17095 final int privateFlags2 = mPrivateFlags2; 17096 if ((privateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0) { 17097 viewStateIndex |= StateSet.VIEW_STATE_DRAG_CAN_ACCEPT; 17098 } 17099 if ((privateFlags2 & PFLAG2_DRAG_HOVERED) != 0) { 17100 viewStateIndex |= StateSet.VIEW_STATE_DRAG_HOVERED; 17101 } 17102 17103 drawableState = StateSet.get(viewStateIndex); 17104 17105 //noinspection ConstantIfStatement 17106 if (false) { 17107 Log.i("View", "drawableStateIndex=" + viewStateIndex); 17108 Log.i("View", toString() 17109 + " pressed=" + ((privateFlags & PFLAG_PRESSED) != 0) 17110 + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) 17111 + " fo=" + hasFocus() 17112 + " sl=" + ((privateFlags & PFLAG_SELECTED) != 0) 17113 + " wf=" + hasWindowFocus() 17114 + ": " + Arrays.toString(drawableState)); 17115 } 17116 17117 if (extraSpace == 0) { 17118 return drawableState; 17119 } 17120 17121 final int[] fullState; 17122 if (drawableState != null) { 17123 fullState = new int[drawableState.length + extraSpace]; 17124 System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); 17125 } else { 17126 fullState = new int[extraSpace]; 17127 } 17128 17129 return fullState; 17130 } 17131 17132 /** 17133 * Merge your own state values in <var>additionalState</var> into the base 17134 * state values <var>baseState</var> that were returned by 17135 * {@link #onCreateDrawableState(int)}. 17136 * 17137 * @param baseState The base state values returned by 17138 * {@link #onCreateDrawableState(int)}, which will be modified to also hold your 17139 * own additional state values. 17140 * 17141 * @param additionalState The additional state values you would like 17142 * added to <var>baseState</var>; this array is not modified. 17143 * 17144 * @return As a convenience, the <var>baseState</var> array you originally 17145 * passed into the function is returned. 17146 * 17147 * @see #onCreateDrawableState(int) 17148 */ 17149 protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { 17150 final int N = baseState.length; 17151 int i = N - 1; 17152 while (i >= 0 && baseState[i] == 0) { 17153 i--; 17154 } 17155 System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); 17156 return baseState; 17157 } 17158 17159 /** 17160 * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} 17161 * on all Drawable objects associated with this view. 17162 * <p> 17163 * Also calls {@link StateListAnimator#jumpToCurrentState()} if there is a StateListAnimator 17164 * attached to this view. 17165 */ 17166 @CallSuper 17167 public void jumpDrawablesToCurrentState() { 17168 if (mBackground != null) { 17169 mBackground.jumpToCurrentState(); 17170 } 17171 if (mStateListAnimator != null) { 17172 mStateListAnimator.jumpToCurrentState(); 17173 } 17174 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { 17175 mForegroundInfo.mDrawable.jumpToCurrentState(); 17176 } 17177 } 17178 17179 /** 17180 * Sets the background color for this view. 17181 * @param color the color of the background 17182 */ 17183 @RemotableViewMethod 17184 public void setBackgroundColor(@ColorInt int color) { 17185 if (mBackground instanceof ColorDrawable) { 17186 ((ColorDrawable) mBackground.mutate()).setColor(color); 17187 computeOpaqueFlags(); 17188 mBackgroundResource = 0; 17189 } else { 17190 setBackground(new ColorDrawable(color)); 17191 } 17192 } 17193 17194 /** 17195 * Set the background to a given resource. The resource should refer to 17196 * a Drawable object or 0 to remove the background. 17197 * @param resid The identifier of the resource. 17198 * 17199 * @attr ref android.R.styleable#View_background 17200 */ 17201 @RemotableViewMethod 17202 public void setBackgroundResource(@DrawableRes int resid) { 17203 if (resid != 0 && resid == mBackgroundResource) { 17204 return; 17205 } 17206 17207 Drawable d = null; 17208 if (resid != 0) { 17209 d = mContext.getDrawable(resid); 17210 } 17211 setBackground(d); 17212 17213 mBackgroundResource = resid; 17214 } 17215 17216 /** 17217 * Set the background to a given Drawable, or remove the background. If the 17218 * background has padding, this View's padding is set to the background's 17219 * padding. However, when a background is removed, this View's padding isn't 17220 * touched. If setting the padding is desired, please use 17221 * {@link #setPadding(int, int, int, int)}. 17222 * 17223 * @param background The Drawable to use as the background, or null to remove the 17224 * background 17225 */ 17226 public void setBackground(Drawable background) { 17227 //noinspection deprecation 17228 setBackgroundDrawable(background); 17229 } 17230 17231 /** 17232 * @deprecated use {@link #setBackground(Drawable)} instead 17233 */ 17234 @Deprecated 17235 public void setBackgroundDrawable(Drawable background) { 17236 computeOpaqueFlags(); 17237 17238 if (background == mBackground) { 17239 return; 17240 } 17241 17242 boolean requestLayout = false; 17243 17244 mBackgroundResource = 0; 17245 17246 /* 17247 * Regardless of whether we're setting a new background or not, we want 17248 * to clear the previous drawable. 17249 */ 17250 if (mBackground != null) { 17251 mBackground.setCallback(null); 17252 unscheduleDrawable(mBackground); 17253 } 17254 17255 if (background != null) { 17256 Rect padding = sThreadLocal.get(); 17257 if (padding == null) { 17258 padding = new Rect(); 17259 sThreadLocal.set(padding); 17260 } 17261 resetResolvedDrawablesInternal(); 17262 background.setLayoutDirection(getLayoutDirection()); 17263 if (background.getPadding(padding)) { 17264 resetResolvedPaddingInternal(); 17265 switch (background.getLayoutDirection()) { 17266 case LAYOUT_DIRECTION_RTL: 17267 mUserPaddingLeftInitial = padding.right; 17268 mUserPaddingRightInitial = padding.left; 17269 internalSetPadding(padding.right, padding.top, padding.left, padding.bottom); 17270 break; 17271 case LAYOUT_DIRECTION_LTR: 17272 default: 17273 mUserPaddingLeftInitial = padding.left; 17274 mUserPaddingRightInitial = padding.right; 17275 internalSetPadding(padding.left, padding.top, padding.right, padding.bottom); 17276 } 17277 mLeftPaddingDefined = false; 17278 mRightPaddingDefined = false; 17279 } 17280 17281 // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or 17282 // if it has a different minimum size, we should layout again 17283 if (mBackground == null 17284 || mBackground.getMinimumHeight() != background.getMinimumHeight() 17285 || mBackground.getMinimumWidth() != background.getMinimumWidth()) { 17286 requestLayout = true; 17287 } 17288 17289 background.setCallback(this); 17290 if (background.isStateful()) { 17291 background.setState(getDrawableState()); 17292 } 17293 background.setVisible(getVisibility() == VISIBLE, false); 17294 mBackground = background; 17295 17296 applyBackgroundTint(); 17297 17298 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 17299 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 17300 requestLayout = true; 17301 } 17302 } else { 17303 /* Remove the background */ 17304 mBackground = null; 17305 if ((mViewFlags & WILL_NOT_DRAW) != 0 17306 && (mForegroundInfo == null || mForegroundInfo.mDrawable == null)) { 17307 mPrivateFlags |= PFLAG_SKIP_DRAW; 17308 } 17309 17310 /* 17311 * When the background is set, we try to apply its padding to this 17312 * View. When the background is removed, we don't touch this View's 17313 * padding. This is noted in the Javadocs. Hence, we don't need to 17314 * requestLayout(), the invalidate() below is sufficient. 17315 */ 17316 17317 // The old background's minimum size could have affected this 17318 // View's layout, so let's requestLayout 17319 requestLayout = true; 17320 } 17321 17322 computeOpaqueFlags(); 17323 17324 if (requestLayout) { 17325 requestLayout(); 17326 } 17327 17328 mBackgroundSizeChanged = true; 17329 invalidate(true); 17330 } 17331 17332 /** 17333 * Gets the background drawable 17334 * 17335 * @return The drawable used as the background for this view, if any. 17336 * 17337 * @see #setBackground(Drawable) 17338 * 17339 * @attr ref android.R.styleable#View_background 17340 */ 17341 public Drawable getBackground() { 17342 return mBackground; 17343 } 17344 17345 /** 17346 * Applies a tint to the background drawable. Does not modify the current tint 17347 * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. 17348 * <p> 17349 * Subsequent calls to {@link #setBackground(Drawable)} will automatically 17350 * mutate the drawable and apply the specified tint and tint mode using 17351 * {@link Drawable#setTintList(ColorStateList)}. 17352 * 17353 * @param tint the tint to apply, may be {@code null} to clear tint 17354 * 17355 * @attr ref android.R.styleable#View_backgroundTint 17356 * @see #getBackgroundTintList() 17357 * @see Drawable#setTintList(ColorStateList) 17358 */ 17359 public void setBackgroundTintList(@Nullable ColorStateList tint) { 17360 if (mBackgroundTint == null) { 17361 mBackgroundTint = new TintInfo(); 17362 } 17363 mBackgroundTint.mTintList = tint; 17364 mBackgroundTint.mHasTintList = true; 17365 17366 applyBackgroundTint(); 17367 } 17368 17369 /** 17370 * Return the tint applied to the background drawable, if specified. 17371 * 17372 * @return the tint applied to the background drawable 17373 * @attr ref android.R.styleable#View_backgroundTint 17374 * @see #setBackgroundTintList(ColorStateList) 17375 */ 17376 @Nullable 17377 public ColorStateList getBackgroundTintList() { 17378 return mBackgroundTint != null ? mBackgroundTint.mTintList : null; 17379 } 17380 17381 /** 17382 * Specifies the blending mode used to apply the tint specified by 17383 * {@link #setBackgroundTintList(ColorStateList)}} to the background 17384 * drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. 17385 * 17386 * @param tintMode the blending mode used to apply the tint, may be 17387 * {@code null} to clear tint 17388 * @attr ref android.R.styleable#View_backgroundTintMode 17389 * @see #getBackgroundTintMode() 17390 * @see Drawable#setTintMode(PorterDuff.Mode) 17391 */ 17392 public void setBackgroundTintMode(@Nullable PorterDuff.Mode tintMode) { 17393 if (mBackgroundTint == null) { 17394 mBackgroundTint = new TintInfo(); 17395 } 17396 mBackgroundTint.mTintMode = tintMode; 17397 mBackgroundTint.mHasTintMode = true; 17398 17399 applyBackgroundTint(); 17400 } 17401 17402 /** 17403 * Return the blending mode used to apply the tint to the background 17404 * drawable, if specified. 17405 * 17406 * @return the blending mode used to apply the tint to the background 17407 * drawable 17408 * @attr ref android.R.styleable#View_backgroundTintMode 17409 * @see #setBackgroundTintMode(PorterDuff.Mode) 17410 */ 17411 @Nullable 17412 public PorterDuff.Mode getBackgroundTintMode() { 17413 return mBackgroundTint != null ? mBackgroundTint.mTintMode : null; 17414 } 17415 17416 private void applyBackgroundTint() { 17417 if (mBackground != null && mBackgroundTint != null) { 17418 final TintInfo tintInfo = mBackgroundTint; 17419 if (tintInfo.mHasTintList || tintInfo.mHasTintMode) { 17420 mBackground = mBackground.mutate(); 17421 17422 if (tintInfo.mHasTintList) { 17423 mBackground.setTintList(tintInfo.mTintList); 17424 } 17425 17426 if (tintInfo.mHasTintMode) { 17427 mBackground.setTintMode(tintInfo.mTintMode); 17428 } 17429 17430 // The drawable (or one of its children) may not have been 17431 // stateful before applying the tint, so let's try again. 17432 if (mBackground.isStateful()) { 17433 mBackground.setState(getDrawableState()); 17434 } 17435 } 17436 } 17437 } 17438 17439 /** 17440 * Returns the drawable used as the foreground of this View. The 17441 * foreground drawable, if non-null, is always drawn on top of the view's content. 17442 * 17443 * @return a Drawable or null if no foreground was set 17444 * 17445 * @see #onDrawForeground(Canvas) 17446 */ 17447 public Drawable getForeground() { 17448 return mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 17449 } 17450 17451 /** 17452 * Supply a Drawable that is to be rendered on top of all of the content in the view. 17453 * 17454 * @param foreground the Drawable to be drawn on top of the children 17455 * 17456 * @attr ref android.R.styleable#View_foreground 17457 */ 17458 public void setForeground(Drawable foreground) { 17459 if (mForegroundInfo == null) { 17460 if (foreground == null) { 17461 // Nothing to do. 17462 return; 17463 } 17464 mForegroundInfo = new ForegroundInfo(); 17465 } 17466 17467 if (foreground == mForegroundInfo.mDrawable) { 17468 // Nothing to do 17469 return; 17470 } 17471 17472 if (mForegroundInfo.mDrawable != null) { 17473 mForegroundInfo.mDrawable.setCallback(null); 17474 unscheduleDrawable(mForegroundInfo.mDrawable); 17475 } 17476 17477 mForegroundInfo.mDrawable = foreground; 17478 mForegroundInfo.mBoundsChanged = true; 17479 if (foreground != null) { 17480 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 17481 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 17482 } 17483 foreground.setCallback(this); 17484 foreground.setLayoutDirection(getLayoutDirection()); 17485 if (foreground.isStateful()) { 17486 foreground.setState(getDrawableState()); 17487 } 17488 applyForegroundTint(); 17489 } else if ((mViewFlags & WILL_NOT_DRAW) != 0 && mBackground == null) { 17490 mPrivateFlags |= PFLAG_SKIP_DRAW; 17491 } 17492 requestLayout(); 17493 invalidate(); 17494 } 17495 17496 /** 17497 * Magic bit used to support features of framework-internal window decor implementation details. 17498 * This used to live exclusively in FrameLayout. 17499 * 17500 * @return true if the foreground should draw inside the padding region or false 17501 * if it should draw inset by the view's padding 17502 * @hide internal use only; only used by FrameLayout and internal screen layouts. 17503 */ 17504 public boolean isForegroundInsidePadding() { 17505 return mForegroundInfo != null ? mForegroundInfo.mInsidePadding : true; 17506 } 17507 17508 /** 17509 * Describes how the foreground is positioned. 17510 * 17511 * @return foreground gravity. 17512 * 17513 * @see #setForegroundGravity(int) 17514 * 17515 * @attr ref android.R.styleable#View_foregroundGravity 17516 */ 17517 public int getForegroundGravity() { 17518 return mForegroundInfo != null ? mForegroundInfo.mGravity 17519 : Gravity.START | Gravity.TOP; 17520 } 17521 17522 /** 17523 * Describes how the foreground is positioned. Defaults to START and TOP. 17524 * 17525 * @param gravity see {@link android.view.Gravity} 17526 * 17527 * @see #getForegroundGravity() 17528 * 17529 * @attr ref android.R.styleable#View_foregroundGravity 17530 */ 17531 public void setForegroundGravity(int gravity) { 17532 if (mForegroundInfo == null) { 17533 mForegroundInfo = new ForegroundInfo(); 17534 } 17535 17536 if (mForegroundInfo.mGravity != gravity) { 17537 if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) { 17538 gravity |= Gravity.START; 17539 } 17540 17541 if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { 17542 gravity |= Gravity.TOP; 17543 } 17544 17545 mForegroundInfo.mGravity = gravity; 17546 requestLayout(); 17547 } 17548 } 17549 17550 /** 17551 * Applies a tint to the foreground drawable. Does not modify the current tint 17552 * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. 17553 * <p> 17554 * Subsequent calls to {@link #setForeground(Drawable)} will automatically 17555 * mutate the drawable and apply the specified tint and tint mode using 17556 * {@link Drawable#setTintList(ColorStateList)}. 17557 * 17558 * @param tint the tint to apply, may be {@code null} to clear tint 17559 * 17560 * @attr ref android.R.styleable#View_foregroundTint 17561 * @see #getForegroundTintList() 17562 * @see Drawable#setTintList(ColorStateList) 17563 */ 17564 public void setForegroundTintList(@Nullable ColorStateList tint) { 17565 if (mForegroundInfo == null) { 17566 mForegroundInfo = new ForegroundInfo(); 17567 } 17568 if (mForegroundInfo.mTintInfo == null) { 17569 mForegroundInfo.mTintInfo = new TintInfo(); 17570 } 17571 mForegroundInfo.mTintInfo.mTintList = tint; 17572 mForegroundInfo.mTintInfo.mHasTintList = true; 17573 17574 applyForegroundTint(); 17575 } 17576 17577 /** 17578 * Return the tint applied to the foreground drawable, if specified. 17579 * 17580 * @return the tint applied to the foreground drawable 17581 * @attr ref android.R.styleable#View_foregroundTint 17582 * @see #setForegroundTintList(ColorStateList) 17583 */ 17584 @Nullable 17585 public ColorStateList getForegroundTintList() { 17586 return mForegroundInfo != null && mForegroundInfo.mTintInfo != null 17587 ? mForegroundInfo.mTintInfo.mTintList : null; 17588 } 17589 17590 /** 17591 * Specifies the blending mode used to apply the tint specified by 17592 * {@link #setForegroundTintList(ColorStateList)}} to the background 17593 * drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. 17594 * 17595 * @param tintMode the blending mode used to apply the tint, may be 17596 * {@code null} to clear tint 17597 * @attr ref android.R.styleable#View_foregroundTintMode 17598 * @see #getForegroundTintMode() 17599 * @see Drawable#setTintMode(PorterDuff.Mode) 17600 */ 17601 public void setForegroundTintMode(@Nullable PorterDuff.Mode tintMode) { 17602 if (mForegroundInfo == null) { 17603 mForegroundInfo = new ForegroundInfo(); 17604 } 17605 if (mForegroundInfo.mTintInfo == null) { 17606 mForegroundInfo.mTintInfo = new TintInfo(); 17607 } 17608 mForegroundInfo.mTintInfo.mTintMode = tintMode; 17609 mForegroundInfo.mTintInfo.mHasTintMode = true; 17610 17611 applyForegroundTint(); 17612 } 17613 17614 /** 17615 * Return the blending mode used to apply the tint to the foreground 17616 * drawable, if specified. 17617 * 17618 * @return the blending mode used to apply the tint to the foreground 17619 * drawable 17620 * @attr ref android.R.styleable#View_foregroundTintMode 17621 * @see #setForegroundTintMode(PorterDuff.Mode) 17622 */ 17623 @Nullable 17624 public PorterDuff.Mode getForegroundTintMode() { 17625 return mForegroundInfo != null && mForegroundInfo.mTintInfo != null 17626 ? mForegroundInfo.mTintInfo.mTintMode : null; 17627 } 17628 17629 private void applyForegroundTint() { 17630 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null 17631 && mForegroundInfo.mTintInfo != null) { 17632 final TintInfo tintInfo = mForegroundInfo.mTintInfo; 17633 if (tintInfo.mHasTintList || tintInfo.mHasTintMode) { 17634 mForegroundInfo.mDrawable = mForegroundInfo.mDrawable.mutate(); 17635 17636 if (tintInfo.mHasTintList) { 17637 mForegroundInfo.mDrawable.setTintList(tintInfo.mTintList); 17638 } 17639 17640 if (tintInfo.mHasTintMode) { 17641 mForegroundInfo.mDrawable.setTintMode(tintInfo.mTintMode); 17642 } 17643 17644 // The drawable (or one of its children) may not have been 17645 // stateful before applying the tint, so let's try again. 17646 if (mForegroundInfo.mDrawable.isStateful()) { 17647 mForegroundInfo.mDrawable.setState(getDrawableState()); 17648 } 17649 } 17650 } 17651 } 17652 17653 /** 17654 * Draw any foreground content for this view. 17655 * 17656 * <p>Foreground content may consist of scroll bars, a {@link #setForeground foreground} 17657 * drawable or other view-specific decorations. The foreground is drawn on top of the 17658 * primary view content.</p> 17659 * 17660 * @param canvas canvas to draw into 17661 */ 17662 public void onDrawForeground(Canvas canvas) { 17663 onDrawScrollIndicators(canvas); 17664 onDrawScrollBars(canvas); 17665 17666 final Drawable foreground = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 17667 if (foreground != null) { 17668 if (mForegroundInfo.mBoundsChanged) { 17669 mForegroundInfo.mBoundsChanged = false; 17670 final Rect selfBounds = mForegroundInfo.mSelfBounds; 17671 final Rect overlayBounds = mForegroundInfo.mOverlayBounds; 17672 17673 if (mForegroundInfo.mInsidePadding) { 17674 selfBounds.set(0, 0, getWidth(), getHeight()); 17675 } else { 17676 selfBounds.set(getPaddingLeft(), getPaddingTop(), 17677 getWidth() - getPaddingRight(), getHeight() - getPaddingBottom()); 17678 } 17679 17680 final int ld = getLayoutDirection(); 17681 Gravity.apply(mForegroundInfo.mGravity, foreground.getIntrinsicWidth(), 17682 foreground.getIntrinsicHeight(), selfBounds, overlayBounds, ld); 17683 foreground.setBounds(overlayBounds); 17684 } 17685 17686 foreground.draw(canvas); 17687 } 17688 } 17689 17690 /** 17691 * Sets the padding. The view may add on the space required to display 17692 * the scrollbars, depending on the style and visibility of the scrollbars. 17693 * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, 17694 * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different 17695 * from the values set in this call. 17696 * 17697 * @attr ref android.R.styleable#View_padding 17698 * @attr ref android.R.styleable#View_paddingBottom 17699 * @attr ref android.R.styleable#View_paddingLeft 17700 * @attr ref android.R.styleable#View_paddingRight 17701 * @attr ref android.R.styleable#View_paddingTop 17702 * @param left the left padding in pixels 17703 * @param top the top padding in pixels 17704 * @param right the right padding in pixels 17705 * @param bottom the bottom padding in pixels 17706 */ 17707 public void setPadding(int left, int top, int right, int bottom) { 17708 resetResolvedPaddingInternal(); 17709 17710 mUserPaddingStart = UNDEFINED_PADDING; 17711 mUserPaddingEnd = UNDEFINED_PADDING; 17712 17713 mUserPaddingLeftInitial = left; 17714 mUserPaddingRightInitial = right; 17715 17716 mLeftPaddingDefined = true; 17717 mRightPaddingDefined = true; 17718 17719 internalSetPadding(left, top, right, bottom); 17720 } 17721 17722 /** 17723 * @hide 17724 */ 17725 protected void internalSetPadding(int left, int top, int right, int bottom) { 17726 mUserPaddingLeft = left; 17727 mUserPaddingRight = right; 17728 mUserPaddingBottom = bottom; 17729 17730 final int viewFlags = mViewFlags; 17731 boolean changed = false; 17732 17733 // Common case is there are no scroll bars. 17734 if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { 17735 if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { 17736 final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 17737 ? 0 : getVerticalScrollbarWidth(); 17738 switch (mVerticalScrollbarPosition) { 17739 case SCROLLBAR_POSITION_DEFAULT: 17740 if (isLayoutRtl()) { 17741 left += offset; 17742 } else { 17743 right += offset; 17744 } 17745 break; 17746 case SCROLLBAR_POSITION_RIGHT: 17747 right += offset; 17748 break; 17749 case SCROLLBAR_POSITION_LEFT: 17750 left += offset; 17751 break; 17752 } 17753 } 17754 if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { 17755 bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 17756 ? 0 : getHorizontalScrollbarHeight(); 17757 } 17758 } 17759 17760 if (mPaddingLeft != left) { 17761 changed = true; 17762 mPaddingLeft = left; 17763 } 17764 if (mPaddingTop != top) { 17765 changed = true; 17766 mPaddingTop = top; 17767 } 17768 if (mPaddingRight != right) { 17769 changed = true; 17770 mPaddingRight = right; 17771 } 17772 if (mPaddingBottom != bottom) { 17773 changed = true; 17774 mPaddingBottom = bottom; 17775 } 17776 17777 if (changed) { 17778 requestLayout(); 17779 invalidateOutline(); 17780 } 17781 } 17782 17783 /** 17784 * Sets the relative padding. The view may add on the space required to display 17785 * the scrollbars, depending on the style and visibility of the scrollbars. 17786 * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, 17787 * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different 17788 * from the values set in this call. 17789 * 17790 * @attr ref android.R.styleable#View_padding 17791 * @attr ref android.R.styleable#View_paddingBottom 17792 * @attr ref android.R.styleable#View_paddingStart 17793 * @attr ref android.R.styleable#View_paddingEnd 17794 * @attr ref android.R.styleable#View_paddingTop 17795 * @param start the start padding in pixels 17796 * @param top the top padding in pixels 17797 * @param end the end padding in pixels 17798 * @param bottom the bottom padding in pixels 17799 */ 17800 public void setPaddingRelative(int start, int top, int end, int bottom) { 17801 resetResolvedPaddingInternal(); 17802 17803 mUserPaddingStart = start; 17804 mUserPaddingEnd = end; 17805 mLeftPaddingDefined = true; 17806 mRightPaddingDefined = true; 17807 17808 switch(getLayoutDirection()) { 17809 case LAYOUT_DIRECTION_RTL: 17810 mUserPaddingLeftInitial = end; 17811 mUserPaddingRightInitial = start; 17812 internalSetPadding(end, top, start, bottom); 17813 break; 17814 case LAYOUT_DIRECTION_LTR: 17815 default: 17816 mUserPaddingLeftInitial = start; 17817 mUserPaddingRightInitial = end; 17818 internalSetPadding(start, top, end, bottom); 17819 } 17820 } 17821 17822 /** 17823 * Returns the top padding of this view. 17824 * 17825 * @return the top padding in pixels 17826 */ 17827 public int getPaddingTop() { 17828 return mPaddingTop; 17829 } 17830 17831 /** 17832 * Returns the bottom padding of this view. If there are inset and enabled 17833 * scrollbars, this value may include the space required to display the 17834 * scrollbars as well. 17835 * 17836 * @return the bottom padding in pixels 17837 */ 17838 public int getPaddingBottom() { 17839 return mPaddingBottom; 17840 } 17841 17842 /** 17843 * Returns the left padding of this view. If there are inset and enabled 17844 * scrollbars, this value may include the space required to display the 17845 * scrollbars as well. 17846 * 17847 * @return the left padding in pixels 17848 */ 17849 public int getPaddingLeft() { 17850 if (!isPaddingResolved()) { 17851 resolvePadding(); 17852 } 17853 return mPaddingLeft; 17854 } 17855 17856 /** 17857 * Returns the start padding of this view depending on its resolved layout direction. 17858 * If there are inset and enabled scrollbars, this value may include the space 17859 * required to display the scrollbars as well. 17860 * 17861 * @return the start padding in pixels 17862 */ 17863 public int getPaddingStart() { 17864 if (!isPaddingResolved()) { 17865 resolvePadding(); 17866 } 17867 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 17868 mPaddingRight : mPaddingLeft; 17869 } 17870 17871 /** 17872 * Returns the right padding of this view. If there are inset and enabled 17873 * scrollbars, this value may include the space required to display the 17874 * scrollbars as well. 17875 * 17876 * @return the right padding in pixels 17877 */ 17878 public int getPaddingRight() { 17879 if (!isPaddingResolved()) { 17880 resolvePadding(); 17881 } 17882 return mPaddingRight; 17883 } 17884 17885 /** 17886 * Returns the end padding of this view depending on its resolved layout direction. 17887 * If there are inset and enabled scrollbars, this value may include the space 17888 * required to display the scrollbars as well. 17889 * 17890 * @return the end padding in pixels 17891 */ 17892 public int getPaddingEnd() { 17893 if (!isPaddingResolved()) { 17894 resolvePadding(); 17895 } 17896 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 17897 mPaddingLeft : mPaddingRight; 17898 } 17899 17900 /** 17901 * Return if the padding has been set through relative values 17902 * {@link #setPaddingRelative(int, int, int, int)} or through 17903 * @attr ref android.R.styleable#View_paddingStart or 17904 * @attr ref android.R.styleable#View_paddingEnd 17905 * 17906 * @return true if the padding is relative or false if it is not. 17907 */ 17908 public boolean isPaddingRelative() { 17909 return (mUserPaddingStart != UNDEFINED_PADDING || mUserPaddingEnd != UNDEFINED_PADDING); 17910 } 17911 17912 Insets computeOpticalInsets() { 17913 return (mBackground == null) ? Insets.NONE : mBackground.getOpticalInsets(); 17914 } 17915 17916 /** 17917 * @hide 17918 */ 17919 public void resetPaddingToInitialValues() { 17920 if (isRtlCompatibilityMode()) { 17921 mPaddingLeft = mUserPaddingLeftInitial; 17922 mPaddingRight = mUserPaddingRightInitial; 17923 return; 17924 } 17925 if (isLayoutRtl()) { 17926 mPaddingLeft = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingLeftInitial; 17927 mPaddingRight = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingRightInitial; 17928 } else { 17929 mPaddingLeft = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingLeftInitial; 17930 mPaddingRight = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingRightInitial; 17931 } 17932 } 17933 17934 /** 17935 * @hide 17936 */ 17937 public Insets getOpticalInsets() { 17938 if (mLayoutInsets == null) { 17939 mLayoutInsets = computeOpticalInsets(); 17940 } 17941 return mLayoutInsets; 17942 } 17943 17944 /** 17945 * Set this view's optical insets. 17946 * 17947 * <p>This method should be treated similarly to setMeasuredDimension and not as a general 17948 * property. Views that compute their own optical insets should call it as part of measurement. 17949 * This method does not request layout. If you are setting optical insets outside of 17950 * measure/layout itself you will want to call requestLayout() yourself. 17951 * </p> 17952 * @hide 17953 */ 17954 public void setOpticalInsets(Insets insets) { 17955 mLayoutInsets = insets; 17956 } 17957 17958 /** 17959 * Changes the selection state of this view. A view can be selected or not. 17960 * Note that selection is not the same as focus. Views are typically 17961 * selected in the context of an AdapterView like ListView or GridView; 17962 * the selected view is the view that is highlighted. 17963 * 17964 * @param selected true if the view must be selected, false otherwise 17965 */ 17966 public void setSelected(boolean selected) { 17967 //noinspection DoubleNegation 17968 if (((mPrivateFlags & PFLAG_SELECTED) != 0) != selected) { 17969 mPrivateFlags = (mPrivateFlags & ~PFLAG_SELECTED) | (selected ? PFLAG_SELECTED : 0); 17970 if (!selected) resetPressedState(); 17971 invalidate(true); 17972 refreshDrawableState(); 17973 dispatchSetSelected(selected); 17974 if (selected) { 17975 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED); 17976 } else { 17977 notifyViewAccessibilityStateChangedIfNeeded( 17978 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 17979 } 17980 } 17981 } 17982 17983 /** 17984 * Dispatch setSelected to all of this View's children. 17985 * 17986 * @see #setSelected(boolean) 17987 * 17988 * @param selected The new selected state 17989 */ 17990 protected void dispatchSetSelected(boolean selected) { 17991 } 17992 17993 /** 17994 * Indicates the selection state of this view. 17995 * 17996 * @return true if the view is selected, false otherwise 17997 */ 17998 @ViewDebug.ExportedProperty 17999 public boolean isSelected() { 18000 return (mPrivateFlags & PFLAG_SELECTED) != 0; 18001 } 18002 18003 /** 18004 * Changes the activated state of this view. A view can be activated or not. 18005 * Note that activation is not the same as selection. Selection is 18006 * a transient property, representing the view (hierarchy) the user is 18007 * currently interacting with. Activation is a longer-term state that the 18008 * user can move views in and out of. For example, in a list view with 18009 * single or multiple selection enabled, the views in the current selection 18010 * set are activated. (Um, yeah, we are deeply sorry about the terminology 18011 * here.) The activated state is propagated down to children of the view it 18012 * is set on. 18013 * 18014 * @param activated true if the view must be activated, false otherwise 18015 */ 18016 public void setActivated(boolean activated) { 18017 //noinspection DoubleNegation 18018 if (((mPrivateFlags & PFLAG_ACTIVATED) != 0) != activated) { 18019 mPrivateFlags = (mPrivateFlags & ~PFLAG_ACTIVATED) | (activated ? PFLAG_ACTIVATED : 0); 18020 invalidate(true); 18021 refreshDrawableState(); 18022 dispatchSetActivated(activated); 18023 } 18024 } 18025 18026 /** 18027 * Dispatch setActivated to all of this View's children. 18028 * 18029 * @see #setActivated(boolean) 18030 * 18031 * @param activated The new activated state 18032 */ 18033 protected void dispatchSetActivated(boolean activated) { 18034 } 18035 18036 /** 18037 * Indicates the activation state of this view. 18038 * 18039 * @return true if the view is activated, false otherwise 18040 */ 18041 @ViewDebug.ExportedProperty 18042 public boolean isActivated() { 18043 return (mPrivateFlags & PFLAG_ACTIVATED) != 0; 18044 } 18045 18046 /** 18047 * Returns the ViewTreeObserver for this view's hierarchy. The view tree 18048 * observer can be used to get notifications when global events, like 18049 * layout, happen. 18050 * 18051 * The returned ViewTreeObserver observer is not guaranteed to remain 18052 * valid for the lifetime of this View. If the caller of this method keeps 18053 * a long-lived reference to ViewTreeObserver, it should always check for 18054 * the return value of {@link ViewTreeObserver#isAlive()}. 18055 * 18056 * @return The ViewTreeObserver for this view's hierarchy. 18057 */ 18058 public ViewTreeObserver getViewTreeObserver() { 18059 if (mAttachInfo != null) { 18060 return mAttachInfo.mTreeObserver; 18061 } 18062 if (mFloatingTreeObserver == null) { 18063 mFloatingTreeObserver = new ViewTreeObserver(); 18064 } 18065 return mFloatingTreeObserver; 18066 } 18067 18068 /** 18069 * <p>Finds the topmost view in the current view hierarchy.</p> 18070 * 18071 * @return the topmost view containing this view 18072 */ 18073 public View getRootView() { 18074 if (mAttachInfo != null) { 18075 final View v = mAttachInfo.mRootView; 18076 if (v != null) { 18077 return v; 18078 } 18079 } 18080 18081 View parent = this; 18082 18083 while (parent.mParent != null && parent.mParent instanceof View) { 18084 parent = (View) parent.mParent; 18085 } 18086 18087 return parent; 18088 } 18089 18090 /** 18091 * Transforms a motion event from view-local coordinates to on-screen 18092 * coordinates. 18093 * 18094 * @param ev the view-local motion event 18095 * @return false if the transformation could not be applied 18096 * @hide 18097 */ 18098 public boolean toGlobalMotionEvent(MotionEvent ev) { 18099 final AttachInfo info = mAttachInfo; 18100 if (info == null) { 18101 return false; 18102 } 18103 18104 final Matrix m = info.mTmpMatrix; 18105 m.set(Matrix.IDENTITY_MATRIX); 18106 transformMatrixToGlobal(m); 18107 ev.transform(m); 18108 return true; 18109 } 18110 18111 /** 18112 * Transforms a motion event from on-screen coordinates to view-local 18113 * coordinates. 18114 * 18115 * @param ev the on-screen motion event 18116 * @return false if the transformation could not be applied 18117 * @hide 18118 */ 18119 public boolean toLocalMotionEvent(MotionEvent ev) { 18120 final AttachInfo info = mAttachInfo; 18121 if (info == null) { 18122 return false; 18123 } 18124 18125 final Matrix m = info.mTmpMatrix; 18126 m.set(Matrix.IDENTITY_MATRIX); 18127 transformMatrixToLocal(m); 18128 ev.transform(m); 18129 return true; 18130 } 18131 18132 /** 18133 * Modifies the input matrix such that it maps view-local coordinates to 18134 * on-screen coordinates. 18135 * 18136 * @param m input matrix to modify 18137 * @hide 18138 */ 18139 public void transformMatrixToGlobal(Matrix m) { 18140 final ViewParent parent = mParent; 18141 if (parent instanceof View) { 18142 final View vp = (View) parent; 18143 vp.transformMatrixToGlobal(m); 18144 m.preTranslate(-vp.mScrollX, -vp.mScrollY); 18145 } else if (parent instanceof ViewRootImpl) { 18146 final ViewRootImpl vr = (ViewRootImpl) parent; 18147 vr.transformMatrixToGlobal(m); 18148 m.preTranslate(0, -vr.mCurScrollY); 18149 } 18150 18151 m.preTranslate(mLeft, mTop); 18152 18153 if (!hasIdentityMatrix()) { 18154 m.preConcat(getMatrix()); 18155 } 18156 } 18157 18158 /** 18159 * Modifies the input matrix such that it maps on-screen coordinates to 18160 * view-local coordinates. 18161 * 18162 * @param m input matrix to modify 18163 * @hide 18164 */ 18165 public void transformMatrixToLocal(Matrix m) { 18166 final ViewParent parent = mParent; 18167 if (parent instanceof View) { 18168 final View vp = (View) parent; 18169 vp.transformMatrixToLocal(m); 18170 m.postTranslate(vp.mScrollX, vp.mScrollY); 18171 } else if (parent instanceof ViewRootImpl) { 18172 final ViewRootImpl vr = (ViewRootImpl) parent; 18173 vr.transformMatrixToLocal(m); 18174 m.postTranslate(0, vr.mCurScrollY); 18175 } 18176 18177 m.postTranslate(-mLeft, -mTop); 18178 18179 if (!hasIdentityMatrix()) { 18180 m.postConcat(getInverseMatrix()); 18181 } 18182 } 18183 18184 /** 18185 * @hide 18186 */ 18187 @ViewDebug.ExportedProperty(category = "layout", indexMapping = { 18188 @ViewDebug.IntToString(from = 0, to = "x"), 18189 @ViewDebug.IntToString(from = 1, to = "y") 18190 }) 18191 public int[] getLocationOnScreen() { 18192 int[] location = new int[2]; 18193 getLocationOnScreen(location); 18194 return location; 18195 } 18196 18197 /** 18198 * <p>Computes the coordinates of this view on the screen. The argument 18199 * must be an array of two integers. After the method returns, the array 18200 * contains the x and y location in that order.</p> 18201 * 18202 * @param location an array of two integers in which to hold the coordinates 18203 */ 18204 public void getLocationOnScreen(@Size(2) int[] location) { 18205 getLocationInWindow(location); 18206 18207 final AttachInfo info = mAttachInfo; 18208 if (info != null) { 18209 location[0] += info.mWindowLeft; 18210 location[1] += info.mWindowTop; 18211 } 18212 } 18213 18214 /** 18215 * <p>Computes the coordinates of this view in its window. The argument 18216 * must be an array of two integers. After the method returns, the array 18217 * contains the x and y location in that order.</p> 18218 * 18219 * @param location an array of two integers in which to hold the coordinates 18220 */ 18221 public void getLocationInWindow(@Size(2) int[] location) { 18222 if (location == null || location.length < 2) { 18223 throw new IllegalArgumentException("location must be an array of two integers"); 18224 } 18225 18226 if (mAttachInfo == null) { 18227 // When the view is not attached to a window, this method does not make sense 18228 location[0] = location[1] = 0; 18229 return; 18230 } 18231 18232 float[] position = mAttachInfo.mTmpTransformLocation; 18233 position[0] = position[1] = 0.0f; 18234 18235 if (!hasIdentityMatrix()) { 18236 getMatrix().mapPoints(position); 18237 } 18238 18239 position[0] += mLeft; 18240 position[1] += mTop; 18241 18242 ViewParent viewParent = mParent; 18243 while (viewParent instanceof View) { 18244 final View view = (View) viewParent; 18245 18246 position[0] -= view.mScrollX; 18247 position[1] -= view.mScrollY; 18248 18249 if (!view.hasIdentityMatrix()) { 18250 view.getMatrix().mapPoints(position); 18251 } 18252 18253 position[0] += view.mLeft; 18254 position[1] += view.mTop; 18255 18256 viewParent = view.mParent; 18257 } 18258 18259 if (viewParent instanceof ViewRootImpl) { 18260 // *cough* 18261 final ViewRootImpl vr = (ViewRootImpl) viewParent; 18262 position[1] -= vr.mCurScrollY; 18263 } 18264 18265 location[0] = (int) (position[0] + 0.5f); 18266 location[1] = (int) (position[1] + 0.5f); 18267 } 18268 18269 /** 18270 * {@hide} 18271 * @param id the id of the view to be found 18272 * @return the view of the specified id, null if cannot be found 18273 */ 18274 protected View findViewTraversal(@IdRes int id) { 18275 if (id == mID) { 18276 return this; 18277 } 18278 return null; 18279 } 18280 18281 /** 18282 * {@hide} 18283 * @param tag the tag of the view to be found 18284 * @return the view of specified tag, null if cannot be found 18285 */ 18286 protected View findViewWithTagTraversal(Object tag) { 18287 if (tag != null && tag.equals(mTag)) { 18288 return this; 18289 } 18290 return null; 18291 } 18292 18293 /** 18294 * {@hide} 18295 * @param predicate The predicate to evaluate. 18296 * @param childToSkip If not null, ignores this child during the recursive traversal. 18297 * @return The first view that matches the predicate or null. 18298 */ 18299 protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 18300 if (predicate.apply(this)) { 18301 return this; 18302 } 18303 return null; 18304 } 18305 18306 /** 18307 * Look for a child view with the given id. If this view has the given 18308 * id, return this view. 18309 * 18310 * @param id The id to search for. 18311 * @return The view that has the given id in the hierarchy or null 18312 */ 18313 @Nullable 18314 public final View findViewById(@IdRes int id) { 18315 if (id < 0) { 18316 return null; 18317 } 18318 return findViewTraversal(id); 18319 } 18320 18321 /** 18322 * Finds a view by its unuque and stable accessibility id. 18323 * 18324 * @param accessibilityId The searched accessibility id. 18325 * @return The found view. 18326 */ 18327 final View findViewByAccessibilityId(int accessibilityId) { 18328 if (accessibilityId < 0) { 18329 return null; 18330 } 18331 View view = findViewByAccessibilityIdTraversal(accessibilityId); 18332 if (view != null) { 18333 return view.includeForAccessibility() ? view : null; 18334 } 18335 return null; 18336 } 18337 18338 /** 18339 * Performs the traversal to find a view by its unuque and stable accessibility id. 18340 * 18341 * <strong>Note:</strong>This method does not stop at the root namespace 18342 * boundary since the user can touch the screen at an arbitrary location 18343 * potentially crossing the root namespace bounday which will send an 18344 * accessibility event to accessibility services and they should be able 18345 * to obtain the event source. Also accessibility ids are guaranteed to be 18346 * unique in the window. 18347 * 18348 * @param accessibilityId The accessibility id. 18349 * @return The found view. 18350 * 18351 * @hide 18352 */ 18353 public View findViewByAccessibilityIdTraversal(int accessibilityId) { 18354 if (getAccessibilityViewId() == accessibilityId) { 18355 return this; 18356 } 18357 return null; 18358 } 18359 18360 /** 18361 * Look for a child view with the given tag. If this view has the given 18362 * tag, return this view. 18363 * 18364 * @param tag The tag to search for, using "tag.equals(getTag())". 18365 * @return The View that has the given tag in the hierarchy or null 18366 */ 18367 public final View findViewWithTag(Object tag) { 18368 if (tag == null) { 18369 return null; 18370 } 18371 return findViewWithTagTraversal(tag); 18372 } 18373 18374 /** 18375 * {@hide} 18376 * Look for a child view that matches the specified predicate. 18377 * If this view matches the predicate, return this view. 18378 * 18379 * @param predicate The predicate to evaluate. 18380 * @return The first view that matches the predicate or null. 18381 */ 18382 public final View findViewByPredicate(Predicate<View> predicate) { 18383 return findViewByPredicateTraversal(predicate, null); 18384 } 18385 18386 /** 18387 * {@hide} 18388 * Look for a child view that matches the specified predicate, 18389 * starting with the specified view and its descendents and then 18390 * recusively searching the ancestors and siblings of that view 18391 * until this view is reached. 18392 * 18393 * This method is useful in cases where the predicate does not match 18394 * a single unique view (perhaps multiple views use the same id) 18395 * and we are trying to find the view that is "closest" in scope to the 18396 * starting view. 18397 * 18398 * @param start The view to start from. 18399 * @param predicate The predicate to evaluate. 18400 * @return The first view that matches the predicate or null. 18401 */ 18402 public final View findViewByPredicateInsideOut(View start, Predicate<View> predicate) { 18403 View childToSkip = null; 18404 for (;;) { 18405 View view = start.findViewByPredicateTraversal(predicate, childToSkip); 18406 if (view != null || start == this) { 18407 return view; 18408 } 18409 18410 ViewParent parent = start.getParent(); 18411 if (parent == null || !(parent instanceof View)) { 18412 return null; 18413 } 18414 18415 childToSkip = start; 18416 start = (View) parent; 18417 } 18418 } 18419 18420 /** 18421 * Sets the identifier for this view. The identifier does not have to be 18422 * unique in this view's hierarchy. The identifier should be a positive 18423 * number. 18424 * 18425 * @see #NO_ID 18426 * @see #getId() 18427 * @see #findViewById(int) 18428 * 18429 * @param id a number used to identify the view 18430 * 18431 * @attr ref android.R.styleable#View_id 18432 */ 18433 public void setId(@IdRes int id) { 18434 mID = id; 18435 if (mID == View.NO_ID && mLabelForId != View.NO_ID) { 18436 mID = generateViewId(); 18437 } 18438 } 18439 18440 /** 18441 * {@hide} 18442 * 18443 * @param isRoot true if the view belongs to the root namespace, false 18444 * otherwise 18445 */ 18446 public void setIsRootNamespace(boolean isRoot) { 18447 if (isRoot) { 18448 mPrivateFlags |= PFLAG_IS_ROOT_NAMESPACE; 18449 } else { 18450 mPrivateFlags &= ~PFLAG_IS_ROOT_NAMESPACE; 18451 } 18452 } 18453 18454 /** 18455 * {@hide} 18456 * 18457 * @return true if the view belongs to the root namespace, false otherwise 18458 */ 18459 public boolean isRootNamespace() { 18460 return (mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0; 18461 } 18462 18463 /** 18464 * Returns this view's identifier. 18465 * 18466 * @return a positive integer used to identify the view or {@link #NO_ID} 18467 * if the view has no ID 18468 * 18469 * @see #setId(int) 18470 * @see #findViewById(int) 18471 * @attr ref android.R.styleable#View_id 18472 */ 18473 @IdRes 18474 @ViewDebug.CapturedViewProperty 18475 public int getId() { 18476 return mID; 18477 } 18478 18479 /** 18480 * Returns this view's tag. 18481 * 18482 * @return the Object stored in this view as a tag, or {@code null} if not 18483 * set 18484 * 18485 * @see #setTag(Object) 18486 * @see #getTag(int) 18487 */ 18488 @ViewDebug.ExportedProperty 18489 public Object getTag() { 18490 return mTag; 18491 } 18492 18493 /** 18494 * Sets the tag associated with this view. A tag can be used to mark 18495 * a view in its hierarchy and does not have to be unique within the 18496 * hierarchy. Tags can also be used to store data within a view without 18497 * resorting to another data structure. 18498 * 18499 * @param tag an Object to tag the view with 18500 * 18501 * @see #getTag() 18502 * @see #setTag(int, Object) 18503 */ 18504 public void setTag(final Object tag) { 18505 mTag = tag; 18506 } 18507 18508 /** 18509 * Returns the tag associated with this view and the specified key. 18510 * 18511 * @param key The key identifying the tag 18512 * 18513 * @return the Object stored in this view as a tag, or {@code null} if not 18514 * set 18515 * 18516 * @see #setTag(int, Object) 18517 * @see #getTag() 18518 */ 18519 public Object getTag(int key) { 18520 if (mKeyedTags != null) return mKeyedTags.get(key); 18521 return null; 18522 } 18523 18524 /** 18525 * Sets a tag associated with this view and a key. A tag can be used 18526 * to mark a view in its hierarchy and does not have to be unique within 18527 * the hierarchy. Tags can also be used to store data within a view 18528 * without resorting to another data structure. 18529 * 18530 * The specified key should be an id declared in the resources of the 18531 * application to ensure it is unique (see the <a 18532 * href="{@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). 18533 * Keys identified as belonging to 18534 * the Android framework or not associated with any package will cause 18535 * an {@link IllegalArgumentException} to be thrown. 18536 * 18537 * @param key The key identifying the tag 18538 * @param tag An Object to tag the view with 18539 * 18540 * @throws IllegalArgumentException If they specified key is not valid 18541 * 18542 * @see #setTag(Object) 18543 * @see #getTag(int) 18544 */ 18545 public void setTag(int key, final Object tag) { 18546 // If the package id is 0x00 or 0x01, it's either an undefined package 18547 // or a framework id 18548 if ((key >>> 24) < 2) { 18549 throw new IllegalArgumentException("The key must be an application-specific " 18550 + "resource id."); 18551 } 18552 18553 setKeyedTag(key, tag); 18554 } 18555 18556 /** 18557 * Variation of {@link #setTag(int, Object)} that enforces the key to be a 18558 * framework id. 18559 * 18560 * @hide 18561 */ 18562 public void setTagInternal(int key, Object tag) { 18563 if ((key >>> 24) != 0x1) { 18564 throw new IllegalArgumentException("The key must be a framework-specific " 18565 + "resource id."); 18566 } 18567 18568 setKeyedTag(key, tag); 18569 } 18570 18571 private void setKeyedTag(int key, Object tag) { 18572 if (mKeyedTags == null) { 18573 mKeyedTags = new SparseArray<Object>(2); 18574 } 18575 18576 mKeyedTags.put(key, tag); 18577 } 18578 18579 /** 18580 * Prints information about this view in the log output, with the tag 18581 * {@link #VIEW_LOG_TAG}. 18582 * 18583 * @hide 18584 */ 18585 public void debug() { 18586 debug(0); 18587 } 18588 18589 /** 18590 * Prints information about this view in the log output, with the tag 18591 * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an 18592 * indentation defined by the <code>depth</code>. 18593 * 18594 * @param depth the indentation level 18595 * 18596 * @hide 18597 */ 18598 protected void debug(int depth) { 18599 String output = debugIndent(depth - 1); 18600 18601 output += "+ " + this; 18602 int id = getId(); 18603 if (id != -1) { 18604 output += " (id=" + id + ")"; 18605 } 18606 Object tag = getTag(); 18607 if (tag != null) { 18608 output += " (tag=" + tag + ")"; 18609 } 18610 Log.d(VIEW_LOG_TAG, output); 18611 18612 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 18613 output = debugIndent(depth) + " FOCUSED"; 18614 Log.d(VIEW_LOG_TAG, output); 18615 } 18616 18617 output = debugIndent(depth); 18618 output += "frame={" + mLeft + ", " + mTop + ", " + mRight 18619 + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY 18620 + "} "; 18621 Log.d(VIEW_LOG_TAG, output); 18622 18623 if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 18624 || mPaddingBottom != 0) { 18625 output = debugIndent(depth); 18626 output += "padding={" + mPaddingLeft + ", " + mPaddingTop 18627 + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; 18628 Log.d(VIEW_LOG_TAG, output); 18629 } 18630 18631 output = debugIndent(depth); 18632 output += "mMeasureWidth=" + mMeasuredWidth + 18633 " mMeasureHeight=" + mMeasuredHeight; 18634 Log.d(VIEW_LOG_TAG, output); 18635 18636 output = debugIndent(depth); 18637 if (mLayoutParams == null) { 18638 output += "BAD! no layout params"; 18639 } else { 18640 output = mLayoutParams.debug(output); 18641 } 18642 Log.d(VIEW_LOG_TAG, output); 18643 18644 output = debugIndent(depth); 18645 output += "flags={"; 18646 output += View.printFlags(mViewFlags); 18647 output += "}"; 18648 Log.d(VIEW_LOG_TAG, output); 18649 18650 output = debugIndent(depth); 18651 output += "privateFlags={"; 18652 output += View.printPrivateFlags(mPrivateFlags); 18653 output += "}"; 18654 Log.d(VIEW_LOG_TAG, output); 18655 } 18656 18657 /** 18658 * Creates a string of whitespaces used for indentation. 18659 * 18660 * @param depth the indentation level 18661 * @return a String containing (depth * 2 + 3) * 2 white spaces 18662 * 18663 * @hide 18664 */ 18665 protected static String debugIndent(int depth) { 18666 StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); 18667 for (int i = 0; i < (depth * 2) + 3; i++) { 18668 spaces.append(' ').append(' '); 18669 } 18670 return spaces.toString(); 18671 } 18672 18673 /** 18674 * <p>Return the offset of the widget's text baseline from the widget's top 18675 * boundary. If this widget does not support baseline alignment, this 18676 * method returns -1. </p> 18677 * 18678 * @return the offset of the baseline within the widget's bounds or -1 18679 * if baseline alignment is not supported 18680 */ 18681 @ViewDebug.ExportedProperty(category = "layout") 18682 public int getBaseline() { 18683 return -1; 18684 } 18685 18686 /** 18687 * Returns whether the view hierarchy is currently undergoing a layout pass. This 18688 * information is useful to avoid situations such as calling {@link #requestLayout()} during 18689 * a layout pass. 18690 * 18691 * @return whether the view hierarchy is currently undergoing a layout pass 18692 */ 18693 public boolean isInLayout() { 18694 ViewRootImpl viewRoot = getViewRootImpl(); 18695 return (viewRoot != null && viewRoot.isInLayout()); 18696 } 18697 18698 /** 18699 * Call this when something has changed which has invalidated the 18700 * layout of this view. This will schedule a layout pass of the view 18701 * tree. This should not be called while the view hierarchy is currently in a layout 18702 * pass ({@link #isInLayout()}. If layout is happening, the request may be honored at the 18703 * end of the current layout pass (and then layout will run again) or after the current 18704 * frame is drawn and the next layout occurs. 18705 * 18706 * <p>Subclasses which override this method should call the superclass method to 18707 * handle possible request-during-layout errors correctly.</p> 18708 */ 18709 @CallSuper 18710 public void requestLayout() { 18711 if (mMeasureCache != null) mMeasureCache.clear(); 18712 18713 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == null) { 18714 // Only trigger request-during-layout logic if this is the view requesting it, 18715 // not the views in its parent hierarchy 18716 ViewRootImpl viewRoot = getViewRootImpl(); 18717 if (viewRoot != null && viewRoot.isInLayout()) { 18718 if (!viewRoot.requestLayoutDuringLayout(this)) { 18719 return; 18720 } 18721 } 18722 mAttachInfo.mViewRequestingLayout = this; 18723 } 18724 18725 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 18726 mPrivateFlags |= PFLAG_INVALIDATED; 18727 18728 if (mParent != null && !mParent.isLayoutRequested()) { 18729 mParent.requestLayout(); 18730 } 18731 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == this) { 18732 mAttachInfo.mViewRequestingLayout = null; 18733 } 18734 } 18735 18736 /** 18737 * Forces this view to be laid out during the next layout pass. 18738 * This method does not call requestLayout() or forceLayout() 18739 * on the parent. 18740 */ 18741 public void forceLayout() { 18742 if (mMeasureCache != null) mMeasureCache.clear(); 18743 18744 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 18745 mPrivateFlags |= PFLAG_INVALIDATED; 18746 } 18747 18748 /** 18749 * <p> 18750 * This is called to find out how big a view should be. The parent 18751 * supplies constraint information in the width and height parameters. 18752 * </p> 18753 * 18754 * <p> 18755 * The actual measurement work of a view is performed in 18756 * {@link #onMeasure(int, int)}, called by this method. Therefore, only 18757 * {@link #onMeasure(int, int)} can and must be overridden by subclasses. 18758 * </p> 18759 * 18760 * 18761 * @param widthMeasureSpec Horizontal space requirements as imposed by the 18762 * parent 18763 * @param heightMeasureSpec Vertical space requirements as imposed by the 18764 * parent 18765 * 18766 * @see #onMeasure(int, int) 18767 */ 18768 public final void measure(int widthMeasureSpec, int heightMeasureSpec) { 18769 boolean optical = isLayoutModeOptical(this); 18770 if (optical != isLayoutModeOptical(mParent)) { 18771 Insets insets = getOpticalInsets(); 18772 int oWidth = insets.left + insets.right; 18773 int oHeight = insets.top + insets.bottom; 18774 widthMeasureSpec = MeasureSpec.adjust(widthMeasureSpec, optical ? -oWidth : oWidth); 18775 heightMeasureSpec = MeasureSpec.adjust(heightMeasureSpec, optical ? -oHeight : oHeight); 18776 } 18777 18778 // Suppress sign extension for the low bytes 18779 long key = (long) widthMeasureSpec << 32 | (long) heightMeasureSpec & 0xffffffffL; 18780 if (mMeasureCache == null) mMeasureCache = new LongSparseLongArray(2); 18781 18782 final boolean forceLayout = (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; 18783 final boolean isExactly = MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY && 18784 MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.EXACTLY; 18785 final boolean matchingSize = isExactly && 18786 getMeasuredWidth() == MeasureSpec.getSize(widthMeasureSpec) && 18787 getMeasuredHeight() == MeasureSpec.getSize(heightMeasureSpec); 18788 if (forceLayout || !matchingSize && 18789 (widthMeasureSpec != mOldWidthMeasureSpec || 18790 heightMeasureSpec != mOldHeightMeasureSpec)) { 18791 18792 // first clears the measured dimension flag 18793 mPrivateFlags &= ~PFLAG_MEASURED_DIMENSION_SET; 18794 18795 resolveRtlPropertiesIfNeeded(); 18796 18797 int cacheIndex = forceLayout ? -1 : mMeasureCache.indexOfKey(key); 18798 if (cacheIndex < 0 || sIgnoreMeasureCache) { 18799 // measure ourselves, this should set the measured dimension flag back 18800 onMeasure(widthMeasureSpec, heightMeasureSpec); 18801 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 18802 } else { 18803 long value = mMeasureCache.valueAt(cacheIndex); 18804 // Casting a long to int drops the high 32 bits, no mask needed 18805 setMeasuredDimensionRaw((int) (value >> 32), (int) value); 18806 mPrivateFlags3 |= PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 18807 } 18808 18809 // flag not set, setMeasuredDimension() was not invoked, we raise 18810 // an exception to warn the developer 18811 if ((mPrivateFlags & PFLAG_MEASURED_DIMENSION_SET) != PFLAG_MEASURED_DIMENSION_SET) { 18812 throw new IllegalStateException("View with id " + getId() + ": " 18813 + getClass().getName() + "#onMeasure() did not set the" 18814 + " measured dimension by calling" 18815 + " setMeasuredDimension()"); 18816 } 18817 18818 mPrivateFlags |= PFLAG_LAYOUT_REQUIRED; 18819 } 18820 18821 mOldWidthMeasureSpec = widthMeasureSpec; 18822 mOldHeightMeasureSpec = heightMeasureSpec; 18823 18824 mMeasureCache.put(key, ((long) mMeasuredWidth) << 32 | 18825 (long) mMeasuredHeight & 0xffffffffL); // suppress sign extension 18826 } 18827 18828 /** 18829 * <p> 18830 * Measure the view and its content to determine the measured width and the 18831 * measured height. This method is invoked by {@link #measure(int, int)} and 18832 * should be overridden by subclasses to provide accurate and efficient 18833 * measurement of their contents. 18834 * </p> 18835 * 18836 * <p> 18837 * <strong>CONTRACT:</strong> When overriding this method, you 18838 * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the 18839 * measured width and height of this view. Failure to do so will trigger an 18840 * <code>IllegalStateException</code>, thrown by 18841 * {@link #measure(int, int)}. Calling the superclass' 18842 * {@link #onMeasure(int, int)} is a valid use. 18843 * </p> 18844 * 18845 * <p> 18846 * The base class implementation of measure defaults to the background size, 18847 * unless a larger size is allowed by the MeasureSpec. Subclasses should 18848 * override {@link #onMeasure(int, int)} to provide better measurements of 18849 * their content. 18850 * </p> 18851 * 18852 * <p> 18853 * If this method is overridden, it is the subclass's responsibility to make 18854 * sure the measured height and width are at least the view's minimum height 18855 * and width ({@link #getSuggestedMinimumHeight()} and 18856 * {@link #getSuggestedMinimumWidth()}). 18857 * </p> 18858 * 18859 * @param widthMeasureSpec horizontal space requirements as imposed by the parent. 18860 * The requirements are encoded with 18861 * {@link android.view.View.MeasureSpec}. 18862 * @param heightMeasureSpec vertical space requirements as imposed by the parent. 18863 * The requirements are encoded with 18864 * {@link android.view.View.MeasureSpec}. 18865 * 18866 * @see #getMeasuredWidth() 18867 * @see #getMeasuredHeight() 18868 * @see #setMeasuredDimension(int, int) 18869 * @see #getSuggestedMinimumHeight() 18870 * @see #getSuggestedMinimumWidth() 18871 * @see android.view.View.MeasureSpec#getMode(int) 18872 * @see android.view.View.MeasureSpec#getSize(int) 18873 */ 18874 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 18875 setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), 18876 getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); 18877 } 18878 18879 /** 18880 * <p>This method must be called by {@link #onMeasure(int, int)} to store the 18881 * measured width and measured height. Failing to do so will trigger an 18882 * exception at measurement time.</p> 18883 * 18884 * @param measuredWidth The measured width of this view. May be a complex 18885 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18886 * {@link #MEASURED_STATE_TOO_SMALL}. 18887 * @param measuredHeight The measured height of this view. May be a complex 18888 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18889 * {@link #MEASURED_STATE_TOO_SMALL}. 18890 */ 18891 protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { 18892 boolean optical = isLayoutModeOptical(this); 18893 if (optical != isLayoutModeOptical(mParent)) { 18894 Insets insets = getOpticalInsets(); 18895 int opticalWidth = insets.left + insets.right; 18896 int opticalHeight = insets.top + insets.bottom; 18897 18898 measuredWidth += optical ? opticalWidth : -opticalWidth; 18899 measuredHeight += optical ? opticalHeight : -opticalHeight; 18900 } 18901 setMeasuredDimensionRaw(measuredWidth, measuredHeight); 18902 } 18903 18904 /** 18905 * Sets the measured dimension without extra processing for things like optical bounds. 18906 * Useful for reapplying consistent values that have already been cooked with adjustments 18907 * for optical bounds, etc. such as those from the measurement cache. 18908 * 18909 * @param measuredWidth The measured width of this view. May be a complex 18910 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18911 * {@link #MEASURED_STATE_TOO_SMALL}. 18912 * @param measuredHeight The measured height of this view. May be a complex 18913 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18914 * {@link #MEASURED_STATE_TOO_SMALL}. 18915 */ 18916 private void setMeasuredDimensionRaw(int measuredWidth, int measuredHeight) { 18917 mMeasuredWidth = measuredWidth; 18918 mMeasuredHeight = measuredHeight; 18919 18920 mPrivateFlags |= PFLAG_MEASURED_DIMENSION_SET; 18921 } 18922 18923 /** 18924 * Merge two states as returned by {@link #getMeasuredState()}. 18925 * @param curState The current state as returned from a view or the result 18926 * of combining multiple views. 18927 * @param newState The new view state to combine. 18928 * @return Returns a new integer reflecting the combination of the two 18929 * states. 18930 */ 18931 public static int combineMeasuredStates(int curState, int newState) { 18932 return curState | newState; 18933 } 18934 18935 /** 18936 * Version of {@link #resolveSizeAndState(int, int, int)} 18937 * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. 18938 */ 18939 public static int resolveSize(int size, int measureSpec) { 18940 return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; 18941 } 18942 18943 /** 18944 * Utility to reconcile a desired size and state, with constraints imposed 18945 * by a MeasureSpec. Will take the desired size, unless a different size 18946 * is imposed by the constraints. The returned value is a compound integer, 18947 * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and 18948 * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the 18949 * resulting size is smaller than the size the view wants to be. 18950 * 18951 * @param size How big the view wants to be. 18952 * @param measureSpec Constraints imposed by the parent. 18953 * @param childMeasuredState Size information bit mask for the view's 18954 * children. 18955 * @return Size information bit mask as defined by 18956 * {@link #MEASURED_SIZE_MASK} and 18957 * {@link #MEASURED_STATE_TOO_SMALL}. 18958 */ 18959 public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { 18960 final int specMode = MeasureSpec.getMode(measureSpec); 18961 final int specSize = MeasureSpec.getSize(measureSpec); 18962 final int result; 18963 switch (specMode) { 18964 case MeasureSpec.AT_MOST: 18965 if (specSize < size) { 18966 result = specSize | MEASURED_STATE_TOO_SMALL; 18967 } else { 18968 result = size; 18969 } 18970 break; 18971 case MeasureSpec.EXACTLY: 18972 result = specSize; 18973 break; 18974 case MeasureSpec.UNSPECIFIED: 18975 default: 18976 result = size; 18977 } 18978 return result | (childMeasuredState & MEASURED_STATE_MASK); 18979 } 18980 18981 /** 18982 * Utility to return a default size. Uses the supplied size if the 18983 * MeasureSpec imposed no constraints. Will get larger if allowed 18984 * by the MeasureSpec. 18985 * 18986 * @param size Default size for this view 18987 * @param measureSpec Constraints imposed by the parent 18988 * @return The size this view should be. 18989 */ 18990 public static int getDefaultSize(int size, int measureSpec) { 18991 int result = size; 18992 int specMode = MeasureSpec.getMode(measureSpec); 18993 int specSize = MeasureSpec.getSize(measureSpec); 18994 18995 switch (specMode) { 18996 case MeasureSpec.UNSPECIFIED: 18997 result = size; 18998 break; 18999 case MeasureSpec.AT_MOST: 19000 case MeasureSpec.EXACTLY: 19001 result = specSize; 19002 break; 19003 } 19004 return result; 19005 } 19006 19007 /** 19008 * Returns the suggested minimum height that the view should use. This 19009 * returns the maximum of the view's minimum height 19010 * and the background's minimum height 19011 * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). 19012 * <p> 19013 * When being used in {@link #onMeasure(int, int)}, the caller should still 19014 * ensure the returned height is within the requirements of the parent. 19015 * 19016 * @return The suggested minimum height of the view. 19017 */ 19018 protected int getSuggestedMinimumHeight() { 19019 return (mBackground == null) ? mMinHeight : max(mMinHeight, mBackground.getMinimumHeight()); 19020 19021 } 19022 19023 /** 19024 * Returns the suggested minimum width that the view should use. This 19025 * returns the maximum of the view's minimum width) 19026 * and the background's minimum width 19027 * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). 19028 * <p> 19029 * When being used in {@link #onMeasure(int, int)}, the caller should still 19030 * ensure the returned width is within the requirements of the parent. 19031 * 19032 * @return The suggested minimum width of the view. 19033 */ 19034 protected int getSuggestedMinimumWidth() { 19035 return (mBackground == null) ? mMinWidth : max(mMinWidth, mBackground.getMinimumWidth()); 19036 } 19037 19038 /** 19039 * Returns the minimum height of the view. 19040 * 19041 * @return the minimum height the view will try to be. 19042 * 19043 * @see #setMinimumHeight(int) 19044 * 19045 * @attr ref android.R.styleable#View_minHeight 19046 */ 19047 public int getMinimumHeight() { 19048 return mMinHeight; 19049 } 19050 19051 /** 19052 * Sets the minimum height of the view. It is not guaranteed the view will 19053 * be able to achieve this minimum height (for example, if its parent layout 19054 * constrains it with less available height). 19055 * 19056 * @param minHeight The minimum height the view will try to be. 19057 * 19058 * @see #getMinimumHeight() 19059 * 19060 * @attr ref android.R.styleable#View_minHeight 19061 */ 19062 public void setMinimumHeight(int minHeight) { 19063 mMinHeight = minHeight; 19064 requestLayout(); 19065 } 19066 19067 /** 19068 * Returns the minimum width of the view. 19069 * 19070 * @return the minimum width the view will try to be. 19071 * 19072 * @see #setMinimumWidth(int) 19073 * 19074 * @attr ref android.R.styleable#View_minWidth 19075 */ 19076 public int getMinimumWidth() { 19077 return mMinWidth; 19078 } 19079 19080 /** 19081 * Sets the minimum width of the view. It is not guaranteed the view will 19082 * be able to achieve this minimum width (for example, if its parent layout 19083 * constrains it with less available width). 19084 * 19085 * @param minWidth The minimum width the view will try to be. 19086 * 19087 * @see #getMinimumWidth() 19088 * 19089 * @attr ref android.R.styleable#View_minWidth 19090 */ 19091 public void setMinimumWidth(int minWidth) { 19092 mMinWidth = minWidth; 19093 requestLayout(); 19094 19095 } 19096 19097 /** 19098 * Get the animation currently associated with this view. 19099 * 19100 * @return The animation that is currently playing or 19101 * scheduled to play for this view. 19102 */ 19103 public Animation getAnimation() { 19104 return mCurrentAnimation; 19105 } 19106 19107 /** 19108 * Start the specified animation now. 19109 * 19110 * @param animation the animation to start now 19111 */ 19112 public void startAnimation(Animation animation) { 19113 animation.setStartTime(Animation.START_ON_FIRST_FRAME); 19114 setAnimation(animation); 19115 invalidateParentCaches(); 19116 invalidate(true); 19117 } 19118 19119 /** 19120 * Cancels any animations for this view. 19121 */ 19122 public void clearAnimation() { 19123 if (mCurrentAnimation != null) { 19124 mCurrentAnimation.detach(); 19125 } 19126 mCurrentAnimation = null; 19127 invalidateParentIfNeeded(); 19128 } 19129 19130 /** 19131 * Sets the next animation to play for this view. 19132 * If you want the animation to play immediately, use 19133 * {@link #startAnimation(android.view.animation.Animation)} instead. 19134 * This method provides allows fine-grained 19135 * control over the start time and invalidation, but you 19136 * must make sure that 1) the animation has a start time set, and 19137 * 2) the view's parent (which controls animations on its children) 19138 * will be invalidated when the animation is supposed to 19139 * start. 19140 * 19141 * @param animation The next animation, or null. 19142 */ 19143 public void setAnimation(Animation animation) { 19144 mCurrentAnimation = animation; 19145 19146 if (animation != null) { 19147 // If the screen is off assume the animation start time is now instead of 19148 // the next frame we draw. Keeping the START_ON_FIRST_FRAME start time 19149 // would cause the animation to start when the screen turns back on 19150 if (mAttachInfo != null && mAttachInfo.mDisplayState == Display.STATE_OFF 19151 && animation.getStartTime() == Animation.START_ON_FIRST_FRAME) { 19152 animation.setStartTime(AnimationUtils.currentAnimationTimeMillis()); 19153 } 19154 animation.reset(); 19155 } 19156 } 19157 19158 /** 19159 * Invoked by a parent ViewGroup to notify the start of the animation 19160 * currently associated with this view. If you override this method, 19161 * always call super.onAnimationStart(); 19162 * 19163 * @see #setAnimation(android.view.animation.Animation) 19164 * @see #getAnimation() 19165 */ 19166 @CallSuper 19167 protected void onAnimationStart() { 19168 mPrivateFlags |= PFLAG_ANIMATION_STARTED; 19169 } 19170 19171 /** 19172 * Invoked by a parent ViewGroup to notify the end of the animation 19173 * currently associated with this view. If you override this method, 19174 * always call super.onAnimationEnd(); 19175 * 19176 * @see #setAnimation(android.view.animation.Animation) 19177 * @see #getAnimation() 19178 */ 19179 @CallSuper 19180 protected void onAnimationEnd() { 19181 mPrivateFlags &= ~PFLAG_ANIMATION_STARTED; 19182 } 19183 19184 /** 19185 * Invoked if there is a Transform that involves alpha. Subclass that can 19186 * draw themselves with the specified alpha should return true, and then 19187 * respect that alpha when their onDraw() is called. If this returns false 19188 * then the view may be redirected to draw into an offscreen buffer to 19189 * fulfill the request, which will look fine, but may be slower than if the 19190 * subclass handles it internally. The default implementation returns false. 19191 * 19192 * @param alpha The alpha (0..255) to apply to the view's drawing 19193 * @return true if the view can draw with the specified alpha. 19194 */ 19195 protected boolean onSetAlpha(int alpha) { 19196 return false; 19197 } 19198 19199 /** 19200 * This is used by the RootView to perform an optimization when 19201 * the view hierarchy contains one or several SurfaceView. 19202 * SurfaceView is always considered transparent, but its children are not, 19203 * therefore all View objects remove themselves from the global transparent 19204 * region (passed as a parameter to this function). 19205 * 19206 * @param region The transparent region for this ViewAncestor (window). 19207 * 19208 * @return Returns true if the effective visibility of the view at this 19209 * point is opaque, regardless of the transparent region; returns false 19210 * if it is possible for underlying windows to be seen behind the view. 19211 * 19212 * {@hide} 19213 */ 19214 public boolean gatherTransparentRegion(Region region) { 19215 final AttachInfo attachInfo = mAttachInfo; 19216 if (region != null && attachInfo != null) { 19217 final int pflags = mPrivateFlags; 19218 if ((pflags & PFLAG_SKIP_DRAW) == 0) { 19219 // The SKIP_DRAW flag IS NOT set, so this view draws. We need to 19220 // remove it from the transparent region. 19221 final int[] location = attachInfo.mTransparentLocation; 19222 getLocationInWindow(location); 19223 region.op(location[0], location[1], location[0] + mRight - mLeft, 19224 location[1] + mBottom - mTop, Region.Op.DIFFERENCE); 19225 } else { 19226 if (mBackground != null && mBackground.getOpacity() != PixelFormat.TRANSPARENT) { 19227 // The SKIP_DRAW flag IS set and the background drawable exists, we remove 19228 // the background drawable's non-transparent parts from this transparent region. 19229 applyDrawableToTransparentRegion(mBackground, region); 19230 } 19231 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null 19232 && mForegroundInfo.mDrawable.getOpacity() != PixelFormat.TRANSPARENT) { 19233 // Similarly, we remove the foreground drawable's non-transparent parts. 19234 applyDrawableToTransparentRegion(mForegroundInfo.mDrawable, region); 19235 } 19236 } 19237 } 19238 return true; 19239 } 19240 19241 /** 19242 * Play a sound effect for this view. 19243 * 19244 * <p>The framework will play sound effects for some built in actions, such as 19245 * clicking, but you may wish to play these effects in your widget, 19246 * for instance, for internal navigation. 19247 * 19248 * <p>The sound effect will only be played if sound effects are enabled by the user, and 19249 * {@link #isSoundEffectsEnabled()} is true. 19250 * 19251 * @param soundConstant One of the constants defined in {@link SoundEffectConstants} 19252 */ 19253 public void playSoundEffect(int soundConstant) { 19254 if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { 19255 return; 19256 } 19257 mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); 19258 } 19259 19260 /** 19261 * BZZZTT!!1! 19262 * 19263 * <p>Provide haptic feedback to the user for this view. 19264 * 19265 * <p>The framework will provide haptic feedback for some built in actions, 19266 * such as long presses, but you may wish to provide feedback for your 19267 * own widget. 19268 * 19269 * <p>The feedback will only be performed if 19270 * {@link #isHapticFeedbackEnabled()} is true. 19271 * 19272 * @param feedbackConstant One of the constants defined in 19273 * {@link HapticFeedbackConstants} 19274 */ 19275 public boolean performHapticFeedback(int feedbackConstant) { 19276 return performHapticFeedback(feedbackConstant, 0); 19277 } 19278 19279 /** 19280 * BZZZTT!!1! 19281 * 19282 * <p>Like {@link #performHapticFeedback(int)}, with additional options. 19283 * 19284 * @param feedbackConstant One of the constants defined in 19285 * {@link HapticFeedbackConstants} 19286 * @param flags Additional flags as per {@link HapticFeedbackConstants}. 19287 */ 19288 public boolean performHapticFeedback(int feedbackConstant, int flags) { 19289 if (mAttachInfo == null) { 19290 return false; 19291 } 19292 //noinspection SimplifiableIfStatement 19293 if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 19294 && !isHapticFeedbackEnabled()) { 19295 return false; 19296 } 19297 return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, 19298 (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); 19299 } 19300 19301 /** 19302 * Request that the visibility of the status bar or other screen/window 19303 * decorations be changed. 19304 * 19305 * <p>This method is used to put the over device UI into temporary modes 19306 * where the user's attention is focused more on the application content, 19307 * by dimming or hiding surrounding system affordances. This is typically 19308 * used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY 19309 * Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content 19310 * to be placed behind the action bar (and with these flags other system 19311 * affordances) so that smooth transitions between hiding and showing them 19312 * can be done. 19313 * 19314 * <p>Two representative examples of the use of system UI visibility is 19315 * implementing a content browsing application (like a magazine reader) 19316 * and a video playing application. 19317 * 19318 * <p>The first code shows a typical implementation of a View in a content 19319 * browsing application. In this implementation, the application goes 19320 * into a content-oriented mode by hiding the status bar and action bar, 19321 * and putting the navigation elements into lights out mode. The user can 19322 * then interact with content while in this mode. Such an application should 19323 * provide an easy way for the user to toggle out of the mode (such as to 19324 * check information in the status bar or access notifications). In the 19325 * implementation here, this is done simply by tapping on the content. 19326 * 19327 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java 19328 * content} 19329 * 19330 * <p>This second code sample shows a typical implementation of a View 19331 * in a video playing application. In this situation, while the video is 19332 * playing the application would like to go into a complete full-screen mode, 19333 * to use as much of the display as possible for the video. When in this state 19334 * the user can not interact with the application; the system intercepts 19335 * touching on the screen to pop the UI out of full screen mode. See 19336 * {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code. 19337 * 19338 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java 19339 * content} 19340 * 19341 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 19342 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 19343 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 19344 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 19345 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 19346 */ 19347 public void setSystemUiVisibility(int visibility) { 19348 if (visibility != mSystemUiVisibility) { 19349 mSystemUiVisibility = visibility; 19350 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 19351 mParent.recomputeViewAttributes(this); 19352 } 19353 } 19354 } 19355 19356 /** 19357 * Returns the last {@link #setSystemUiVisibility(int)} that this view has requested. 19358 * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 19359 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 19360 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 19361 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 19362 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 19363 */ 19364 public int getSystemUiVisibility() { 19365 return mSystemUiVisibility; 19366 } 19367 19368 /** 19369 * Returns the current system UI visibility that is currently set for 19370 * the entire window. This is the combination of the 19371 * {@link #setSystemUiVisibility(int)} values supplied by all of the 19372 * views in the window. 19373 */ 19374 public int getWindowSystemUiVisibility() { 19375 return mAttachInfo != null ? mAttachInfo.mSystemUiVisibility : 0; 19376 } 19377 19378 /** 19379 * Override to find out when the window's requested system UI visibility 19380 * has changed, that is the value returned by {@link #getWindowSystemUiVisibility()}. 19381 * This is different from the callbacks received through 19382 * {@link #setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener)} 19383 * in that this is only telling you about the local request of the window, 19384 * not the actual values applied by the system. 19385 */ 19386 public void onWindowSystemUiVisibilityChanged(int visible) { 19387 } 19388 19389 /** 19390 * Dispatch callbacks to {@link #onWindowSystemUiVisibilityChanged(int)} down 19391 * the view hierarchy. 19392 */ 19393 public void dispatchWindowSystemUiVisiblityChanged(int visible) { 19394 onWindowSystemUiVisibilityChanged(visible); 19395 } 19396 19397 /** 19398 * Set a listener to receive callbacks when the visibility of the system bar changes. 19399 * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. 19400 */ 19401 public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { 19402 getListenerInfo().mOnSystemUiVisibilityChangeListener = l; 19403 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 19404 mParent.recomputeViewAttributes(this); 19405 } 19406 } 19407 19408 /** 19409 * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down 19410 * the view hierarchy. 19411 */ 19412 public void dispatchSystemUiVisibilityChanged(int visibility) { 19413 ListenerInfo li = mListenerInfo; 19414 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 19415 li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( 19416 visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); 19417 } 19418 } 19419 19420 boolean updateLocalSystemUiVisibility(int localValue, int localChanges) { 19421 int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); 19422 if (val != mSystemUiVisibility) { 19423 setSystemUiVisibility(val); 19424 return true; 19425 } 19426 return false; 19427 } 19428 19429 /** @hide */ 19430 public void setDisabledSystemUiVisibility(int flags) { 19431 if (mAttachInfo != null) { 19432 if (mAttachInfo.mDisabledSystemUiVisibility != flags) { 19433 mAttachInfo.mDisabledSystemUiVisibility = flags; 19434 if (mParent != null) { 19435 mParent.recomputeViewAttributes(this); 19436 } 19437 } 19438 } 19439 } 19440 19441 /** 19442 * Creates an image that the system displays during the drag and drop 19443 * operation. This is called a "drag shadow". The default implementation 19444 * for a DragShadowBuilder based on a View returns an image that has exactly the same 19445 * appearance as the given View. The default also positions the center of the drag shadow 19446 * directly under the touch point. If no View is provided (the constructor with no parameters 19447 * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and 19448 * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overridden, then the 19449 * default is an invisible drag shadow. 19450 * <p> 19451 * You are not required to use the View you provide to the constructor as the basis of the 19452 * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw 19453 * anything you want as the drag shadow. 19454 * </p> 19455 * <p> 19456 * You pass a DragShadowBuilder object to the system when you start the drag. The system 19457 * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the 19458 * size and position of the drag shadow. It uses this data to construct a 19459 * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} 19460 * so that your application can draw the shadow image in the Canvas. 19461 * </p> 19462 * 19463 * <div class="special reference"> 19464 * <h3>Developer Guides</h3> 19465 * <p>For a guide to implementing drag and drop features, read the 19466 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 19467 * </div> 19468 */ 19469 public static class DragShadowBuilder { 19470 private final WeakReference<View> mView; 19471 19472 /** 19473 * Constructs a shadow image builder based on a View. By default, the resulting drag 19474 * shadow will have the same appearance and dimensions as the View, with the touch point 19475 * over the center of the View. 19476 * @param view A View. Any View in scope can be used. 19477 */ 19478 public DragShadowBuilder(View view) { 19479 mView = new WeakReference<View>(view); 19480 } 19481 19482 /** 19483 * Construct a shadow builder object with no associated View. This 19484 * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} 19485 * and {@link #onDrawShadow(Canvas)} methods are also overridden in order 19486 * to supply the drag shadow's dimensions and appearance without 19487 * reference to any View object. If they are not overridden, then the result is an 19488 * invisible drag shadow. 19489 */ 19490 public DragShadowBuilder() { 19491 mView = new WeakReference<View>(null); 19492 } 19493 19494 /** 19495 * Returns the View object that had been passed to the 19496 * {@link #View.DragShadowBuilder(View)} 19497 * constructor. If that View parameter was {@code null} or if the 19498 * {@link #View.DragShadowBuilder()} 19499 * constructor was used to instantiate the builder object, this method will return 19500 * null. 19501 * 19502 * @return The View object associate with this builder object. 19503 */ 19504 @SuppressWarnings({"JavadocReference"}) 19505 final public View getView() { 19506 return mView.get(); 19507 } 19508 19509 /** 19510 * Provides the metrics for the shadow image. These include the dimensions of 19511 * the shadow image, and the point within that shadow that should 19512 * be centered under the touch location while dragging. 19513 * <p> 19514 * The default implementation sets the dimensions of the shadow to be the 19515 * same as the dimensions of the View itself and centers the shadow under 19516 * the touch point. 19517 * </p> 19518 * 19519 * @param shadowSize A {@link android.graphics.Point} containing the width and height 19520 * of the shadow image. Your application must set {@link android.graphics.Point#x} to the 19521 * desired width and must set {@link android.graphics.Point#y} to the desired height of the 19522 * image. 19523 * 19524 * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the 19525 * shadow image that should be underneath the touch point during the drag and drop 19526 * operation. Your application must set {@link android.graphics.Point#x} to the 19527 * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. 19528 */ 19529 public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 19530 final View view = mView.get(); 19531 if (view != null) { 19532 shadowSize.set(view.getWidth(), view.getHeight()); 19533 shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); 19534 } else { 19535 Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); 19536 } 19537 } 19538 19539 /** 19540 * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object 19541 * based on the dimensions it received from the 19542 * {@link #onProvideShadowMetrics(Point, Point)} callback. 19543 * 19544 * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. 19545 */ 19546 public void onDrawShadow(Canvas canvas) { 19547 final View view = mView.get(); 19548 if (view != null) { 19549 view.draw(canvas); 19550 } else { 19551 Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); 19552 } 19553 } 19554 } 19555 19556 /** 19557 * Starts a drag and drop operation. When your application calls this method, it passes a 19558 * {@link android.view.View.DragShadowBuilder} object to the system. The 19559 * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} 19560 * to get metrics for the drag shadow, and then calls the object's 19561 * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. 19562 * <p> 19563 * Once the system has the drag shadow, it begins the drag and drop operation by sending 19564 * drag events to all the View objects in your application that are currently visible. It does 19565 * this either by calling the View object's drag listener (an implementation of 19566 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the 19567 * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. 19568 * Both are passed a {@link android.view.DragEvent} object that has a 19569 * {@link android.view.DragEvent#getAction()} value of 19570 * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. 19571 * </p> 19572 * <p> 19573 * Your application can invoke startDrag() on any attached View object. The View object does not 19574 * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to 19575 * be related to the View the user selected for dragging. 19576 * </p> 19577 * @param data A {@link android.content.ClipData} object pointing to the data to be 19578 * transferred by the drag and drop operation. 19579 * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the 19580 * drag shadow. 19581 * @param myLocalState An {@link java.lang.Object} containing local data about the drag and 19582 * drop operation. This Object is put into every DragEvent object sent by the system during the 19583 * current drag. 19584 * <p> 19585 * myLocalState is a lightweight mechanism for the sending information from the dragged View 19586 * to the target Views. For example, it can contain flags that differentiate between a 19587 * a copy operation and a move operation. 19588 * </p> 19589 * @param flags Flags that control the drag and drop operation. No flags are currently defined, 19590 * so the parameter should be set to 0. 19591 * @return {@code true} if the method completes successfully, or 19592 * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to 19593 * do a drag, and so no drag operation is in progress. 19594 */ 19595 public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, 19596 Object myLocalState, int flags) { 19597 if (ViewDebug.DEBUG_DRAG) { 19598 Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); 19599 } 19600 boolean okay = false; 19601 19602 Point shadowSize = new Point(); 19603 Point shadowTouchPoint = new Point(); 19604 shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); 19605 19606 if ((shadowSize.x < 0) || (shadowSize.y < 0) || 19607 (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { 19608 throw new IllegalStateException("Drag shadow dimensions must not be negative"); 19609 } 19610 19611 if (ViewDebug.DEBUG_DRAG) { 19612 Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y 19613 + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); 19614 } 19615 Surface surface = new Surface(); 19616 try { 19617 IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, 19618 flags, shadowSize.x, shadowSize.y, surface); 19619 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token 19620 + " surface=" + surface); 19621 if (token != null) { 19622 Canvas canvas = surface.lockCanvas(null); 19623 try { 19624 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 19625 shadowBuilder.onDrawShadow(canvas); 19626 } finally { 19627 surface.unlockCanvasAndPost(canvas); 19628 } 19629 19630 final ViewRootImpl root = getViewRootImpl(); 19631 19632 // Cache the local state object for delivery with DragEvents 19633 root.setLocalDragState(myLocalState); 19634 19635 // repurpose 'shadowSize' for the last touch point 19636 root.getLastTouchPoint(shadowSize); 19637 19638 okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, 19639 shadowSize.x, shadowSize.y, 19640 shadowTouchPoint.x, shadowTouchPoint.y, data); 19641 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); 19642 19643 // Off and running! Release our local surface instance; the drag 19644 // shadow surface is now managed by the system process. 19645 surface.release(); 19646 } 19647 } catch (Exception e) { 19648 Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); 19649 surface.destroy(); 19650 } 19651 19652 return okay; 19653 } 19654 19655 /** 19656 * Handles drag events sent by the system following a call to 19657 * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. 19658 *<p> 19659 * When the system calls this method, it passes a 19660 * {@link android.view.DragEvent} object. A call to 19661 * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined 19662 * in DragEvent. The method uses these to determine what is happening in the drag and drop 19663 * operation. 19664 * @param event The {@link android.view.DragEvent} sent by the system. 19665 * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined 19666 * in DragEvent, indicating the type of drag event represented by this object. 19667 * @return {@code true} if the method was successful, otherwise {@code false}. 19668 * <p> 19669 * The method should return {@code true} in response to an action type of 19670 * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current 19671 * operation. 19672 * </p> 19673 * <p> 19674 * The method should also return {@code true} in response to an action type of 19675 * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or 19676 * {@code false} if it didn't. 19677 * </p> 19678 */ 19679 public boolean onDragEvent(DragEvent event) { 19680 return false; 19681 } 19682 19683 /** 19684 * Detects if this View is enabled and has a drag event listener. 19685 * If both are true, then it calls the drag event listener with the 19686 * {@link android.view.DragEvent} it received. If the drag event listener returns 19687 * {@code true}, then dispatchDragEvent() returns {@code true}. 19688 * <p> 19689 * For all other cases, the method calls the 19690 * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler 19691 * method and returns its result. 19692 * </p> 19693 * <p> 19694 * This ensures that a drag event is always consumed, even if the View does not have a drag 19695 * event listener. However, if the View has a listener and the listener returns true, then 19696 * onDragEvent() is not called. 19697 * </p> 19698 */ 19699 public boolean dispatchDragEvent(DragEvent event) { 19700 ListenerInfo li = mListenerInfo; 19701 //noinspection SimplifiableIfStatement 19702 if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 19703 && li.mOnDragListener.onDrag(this, event)) { 19704 return true; 19705 } 19706 return onDragEvent(event); 19707 } 19708 19709 boolean canAcceptDrag() { 19710 return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0; 19711 } 19712 19713 /** 19714 * This needs to be a better API (NOT ON VIEW) before it is exposed. If 19715 * it is ever exposed at all. 19716 * @hide 19717 */ 19718 public void onCloseSystemDialogs(String reason) { 19719 } 19720 19721 /** 19722 * Given a Drawable whose bounds have been set to draw into this view, 19723 * update a Region being computed for 19724 * {@link #gatherTransparentRegion(android.graphics.Region)} so 19725 * that any non-transparent parts of the Drawable are removed from the 19726 * given transparent region. 19727 * 19728 * @param dr The Drawable whose transparency is to be applied to the region. 19729 * @param region A Region holding the current transparency information, 19730 * where any parts of the region that are set are considered to be 19731 * transparent. On return, this region will be modified to have the 19732 * transparency information reduced by the corresponding parts of the 19733 * Drawable that are not transparent. 19734 * {@hide} 19735 */ 19736 public void applyDrawableToTransparentRegion(Drawable dr, Region region) { 19737 if (DBG) { 19738 Log.i("View", "Getting transparent region for: " + this); 19739 } 19740 final Region r = dr.getTransparentRegion(); 19741 final Rect db = dr.getBounds(); 19742 final AttachInfo attachInfo = mAttachInfo; 19743 if (r != null && attachInfo != null) { 19744 final int w = getRight()-getLeft(); 19745 final int h = getBottom()-getTop(); 19746 if (db.left > 0) { 19747 //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); 19748 r.op(0, 0, db.left, h, Region.Op.UNION); 19749 } 19750 if (db.right < w) { 19751 //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); 19752 r.op(db.right, 0, w, h, Region.Op.UNION); 19753 } 19754 if (db.top > 0) { 19755 //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); 19756 r.op(0, 0, w, db.top, Region.Op.UNION); 19757 } 19758 if (db.bottom < h) { 19759 //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); 19760 r.op(0, db.bottom, w, h, Region.Op.UNION); 19761 } 19762 final int[] location = attachInfo.mTransparentLocation; 19763 getLocationInWindow(location); 19764 r.translate(location[0], location[1]); 19765 region.op(r, Region.Op.INTERSECT); 19766 } else { 19767 region.op(db, Region.Op.DIFFERENCE); 19768 } 19769 } 19770 19771 private void checkForLongClick(int delayOffset) { 19772 if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { 19773 mHasPerformedLongPress = false; 19774 19775 if (mPendingCheckForLongPress == null) { 19776 mPendingCheckForLongPress = new CheckForLongPress(); 19777 } 19778 mPendingCheckForLongPress.rememberWindowAttachCount(); 19779 postDelayed(mPendingCheckForLongPress, 19780 ViewConfiguration.getLongPressTimeout() - delayOffset); 19781 } 19782 } 19783 19784 /** 19785 * Inflate a view from an XML resource. This convenience method wraps the {@link 19786 * LayoutInflater} class, which provides a full range of options for view inflation. 19787 * 19788 * @param context The Context object for your activity or application. 19789 * @param resource The resource ID to inflate 19790 * @param root A view group that will be the parent. Used to properly inflate the 19791 * layout_* parameters. 19792 * @see LayoutInflater 19793 */ 19794 public static View inflate(Context context, @LayoutRes int resource, ViewGroup root) { 19795 LayoutInflater factory = LayoutInflater.from(context); 19796 return factory.inflate(resource, root); 19797 } 19798 19799 /** 19800 * Scroll the view with standard behavior for scrolling beyond the normal 19801 * content boundaries. Views that call this method should override 19802 * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the 19803 * results of an over-scroll operation. 19804 * 19805 * Views can use this method to handle any touch or fling-based scrolling. 19806 * 19807 * @param deltaX Change in X in pixels 19808 * @param deltaY Change in Y in pixels 19809 * @param scrollX Current X scroll value in pixels before applying deltaX 19810 * @param scrollY Current Y scroll value in pixels before applying deltaY 19811 * @param scrollRangeX Maximum content scroll range along the X axis 19812 * @param scrollRangeY Maximum content scroll range along the Y axis 19813 * @param maxOverScrollX Number of pixels to overscroll by in either direction 19814 * along the X axis. 19815 * @param maxOverScrollY Number of pixels to overscroll by in either direction 19816 * along the Y axis. 19817 * @param isTouchEvent true if this scroll operation is the result of a touch event. 19818 * @return true if scrolling was clamped to an over-scroll boundary along either 19819 * axis, false otherwise. 19820 */ 19821 @SuppressWarnings({"UnusedParameters"}) 19822 protected boolean overScrollBy(int deltaX, int deltaY, 19823 int scrollX, int scrollY, 19824 int scrollRangeX, int scrollRangeY, 19825 int maxOverScrollX, int maxOverScrollY, 19826 boolean isTouchEvent) { 19827 final int overScrollMode = mOverScrollMode; 19828 final boolean canScrollHorizontal = 19829 computeHorizontalScrollRange() > computeHorizontalScrollExtent(); 19830 final boolean canScrollVertical = 19831 computeVerticalScrollRange() > computeVerticalScrollExtent(); 19832 final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || 19833 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); 19834 final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || 19835 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); 19836 19837 int newScrollX = scrollX + deltaX; 19838 if (!overScrollHorizontal) { 19839 maxOverScrollX = 0; 19840 } 19841 19842 int newScrollY = scrollY + deltaY; 19843 if (!overScrollVertical) { 19844 maxOverScrollY = 0; 19845 } 19846 19847 // Clamp values if at the limits and record 19848 final int left = -maxOverScrollX; 19849 final int right = maxOverScrollX + scrollRangeX; 19850 final int top = -maxOverScrollY; 19851 final int bottom = maxOverScrollY + scrollRangeY; 19852 19853 boolean clampedX = false; 19854 if (newScrollX > right) { 19855 newScrollX = right; 19856 clampedX = true; 19857 } else if (newScrollX < left) { 19858 newScrollX = left; 19859 clampedX = true; 19860 } 19861 19862 boolean clampedY = false; 19863 if (newScrollY > bottom) { 19864 newScrollY = bottom; 19865 clampedY = true; 19866 } else if (newScrollY < top) { 19867 newScrollY = top; 19868 clampedY = true; 19869 } 19870 19871 onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); 19872 19873 return clampedX || clampedY; 19874 } 19875 19876 /** 19877 * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to 19878 * respond to the results of an over-scroll operation. 19879 * 19880 * @param scrollX New X scroll value in pixels 19881 * @param scrollY New Y scroll value in pixels 19882 * @param clampedX True if scrollX was clamped to an over-scroll boundary 19883 * @param clampedY True if scrollY was clamped to an over-scroll boundary 19884 */ 19885 protected void onOverScrolled(int scrollX, int scrollY, 19886 boolean clampedX, boolean clampedY) { 19887 // Intentionally empty. 19888 } 19889 19890 /** 19891 * Returns the over-scroll mode for this view. The result will be 19892 * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 19893 * (allow over-scrolling only if the view content is larger than the container), 19894 * or {@link #OVER_SCROLL_NEVER}. 19895 * 19896 * @return This view's over-scroll mode. 19897 */ 19898 public int getOverScrollMode() { 19899 return mOverScrollMode; 19900 } 19901 19902 /** 19903 * Set the over-scroll mode for this view. Valid over-scroll modes are 19904 * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 19905 * (allow over-scrolling only if the view content is larger than the container), 19906 * or {@link #OVER_SCROLL_NEVER}. 19907 * 19908 * Setting the over-scroll mode of a view will have an effect only if the 19909 * view is capable of scrolling. 19910 * 19911 * @param overScrollMode The new over-scroll mode for this view. 19912 */ 19913 public void setOverScrollMode(int overScrollMode) { 19914 if (overScrollMode != OVER_SCROLL_ALWAYS && 19915 overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && 19916 overScrollMode != OVER_SCROLL_NEVER) { 19917 throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); 19918 } 19919 mOverScrollMode = overScrollMode; 19920 } 19921 19922 /** 19923 * Enable or disable nested scrolling for this view. 19924 * 19925 * <p>If this property is set to true the view will be permitted to initiate nested 19926 * scrolling operations with a compatible parent view in the current hierarchy. If this 19927 * view does not implement nested scrolling this will have no effect. Disabling nested scrolling 19928 * while a nested scroll is in progress has the effect of {@link #stopNestedScroll() stopping} 19929 * the nested scroll.</p> 19930 * 19931 * @param enabled true to enable nested scrolling, false to disable 19932 * 19933 * @see #isNestedScrollingEnabled() 19934 */ 19935 public void setNestedScrollingEnabled(boolean enabled) { 19936 if (enabled) { 19937 mPrivateFlags3 |= PFLAG3_NESTED_SCROLLING_ENABLED; 19938 } else { 19939 stopNestedScroll(); 19940 mPrivateFlags3 &= ~PFLAG3_NESTED_SCROLLING_ENABLED; 19941 } 19942 } 19943 19944 /** 19945 * Returns true if nested scrolling is enabled for this view. 19946 * 19947 * <p>If nested scrolling is enabled and this View class implementation supports it, 19948 * this view will act as a nested scrolling child view when applicable, forwarding data 19949 * about the scroll operation in progress to a compatible and cooperating nested scrolling 19950 * parent.</p> 19951 * 19952 * @return true if nested scrolling is enabled 19953 * 19954 * @see #setNestedScrollingEnabled(boolean) 19955 */ 19956 public boolean isNestedScrollingEnabled() { 19957 return (mPrivateFlags3 & PFLAG3_NESTED_SCROLLING_ENABLED) == 19958 PFLAG3_NESTED_SCROLLING_ENABLED; 19959 } 19960 19961 /** 19962 * Begin a nestable scroll operation along the given axes. 19963 * 19964 * <p>A view starting a nested scroll promises to abide by the following contract:</p> 19965 * 19966 * <p>The view will call startNestedScroll upon initiating a scroll operation. In the case 19967 * of a touch scroll this corresponds to the initial {@link MotionEvent#ACTION_DOWN}. 19968 * In the case of touch scrolling the nested scroll will be terminated automatically in 19969 * the same manner as {@link ViewParent#requestDisallowInterceptTouchEvent(boolean)}. 19970 * In the event of programmatic scrolling the caller must explicitly call 19971 * {@link #stopNestedScroll()} to indicate the end of the nested scroll.</p> 19972 * 19973 * <p>If <code>startNestedScroll</code> returns true, a cooperative parent was found. 19974 * If it returns false the caller may ignore the rest of this contract until the next scroll. 19975 * Calling startNestedScroll while a nested scroll is already in progress will return true.</p> 19976 * 19977 * <p>At each incremental step of the scroll the caller should invoke 19978 * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} 19979 * once it has calculated the requested scrolling delta. If it returns true the nested scrolling 19980 * parent at least partially consumed the scroll and the caller should adjust the amount it 19981 * scrolls by.</p> 19982 * 19983 * <p>After applying the remainder of the scroll delta the caller should invoke 19984 * {@link #dispatchNestedScroll(int, int, int, int, int[]) dispatchNestedScroll}, passing 19985 * both the delta consumed and the delta unconsumed. A nested scrolling parent may treat 19986 * these values differently. See {@link ViewParent#onNestedScroll(View, int, int, int, int)}. 19987 * </p> 19988 * 19989 * @param axes Flags consisting of a combination of {@link #SCROLL_AXIS_HORIZONTAL} and/or 19990 * {@link #SCROLL_AXIS_VERTICAL}. 19991 * @return true if a cooperative parent was found and nested scrolling has been enabled for 19992 * the current gesture. 19993 * 19994 * @see #stopNestedScroll() 19995 * @see #dispatchNestedPreScroll(int, int, int[], int[]) 19996 * @see #dispatchNestedScroll(int, int, int, int, int[]) 19997 */ 19998 public boolean startNestedScroll(int axes) { 19999 if (hasNestedScrollingParent()) { 20000 // Already in progress 20001 return true; 20002 } 20003 if (isNestedScrollingEnabled()) { 20004 ViewParent p = getParent(); 20005 View child = this; 20006 while (p != null) { 20007 try { 20008 if (p.onStartNestedScroll(child, this, axes)) { 20009 mNestedScrollingParent = p; 20010 p.onNestedScrollAccepted(child, this, axes); 20011 return true; 20012 } 20013 } catch (AbstractMethodError e) { 20014 Log.e(VIEW_LOG_TAG, "ViewParent " + p + " does not implement interface " + 20015 "method onStartNestedScroll", e); 20016 // Allow the search upward to continue 20017 } 20018 if (p instanceof View) { 20019 child = (View) p; 20020 } 20021 p = p.getParent(); 20022 } 20023 } 20024 return false; 20025 } 20026 20027 /** 20028 * Stop a nested scroll in progress. 20029 * 20030 * <p>Calling this method when a nested scroll is not currently in progress is harmless.</p> 20031 * 20032 * @see #startNestedScroll(int) 20033 */ 20034 public void stopNestedScroll() { 20035 if (mNestedScrollingParent != null) { 20036 mNestedScrollingParent.onStopNestedScroll(this); 20037 mNestedScrollingParent = null; 20038 } 20039 } 20040 20041 /** 20042 * Returns true if this view has a nested scrolling parent. 20043 * 20044 * <p>The presence of a nested scrolling parent indicates that this view has initiated 20045 * a nested scroll and it was accepted by an ancestor view further up the view hierarchy.</p> 20046 * 20047 * @return whether this view has a nested scrolling parent 20048 */ 20049 public boolean hasNestedScrollingParent() { 20050 return mNestedScrollingParent != null; 20051 } 20052 20053 /** 20054 * Dispatch one step of a nested scroll in progress. 20055 * 20056 * <p>Implementations of views that support nested scrolling should call this to report 20057 * info about a scroll in progress to the current nested scrolling parent. If a nested scroll 20058 * is not currently in progress or nested scrolling is not 20059 * {@link #isNestedScrollingEnabled() enabled} for this view this method does nothing.</p> 20060 * 20061 * <p>Compatible View implementations should also call 20062 * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} before 20063 * consuming a component of the scroll event themselves.</p> 20064 * 20065 * @param dxConsumed Horizontal distance in pixels consumed by this view during this scroll step 20066 * @param dyConsumed Vertical distance in pixels consumed by this view during this scroll step 20067 * @param dxUnconsumed Horizontal scroll distance in pixels not consumed by this view 20068 * @param dyUnconsumed Horizontal scroll distance in pixels not consumed by this view 20069 * @param offsetInWindow Optional. If not null, on return this will contain the offset 20070 * in local view coordinates of this view from before this operation 20071 * to after it completes. View implementations may use this to adjust 20072 * expected input coordinate tracking. 20073 * @return true if the event was dispatched, false if it could not be dispatched. 20074 * @see #dispatchNestedPreScroll(int, int, int[], int[]) 20075 */ 20076 public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, 20077 int dxUnconsumed, int dyUnconsumed, @Nullable @Size(2) int[] offsetInWindow) { 20078 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20079 if (dxConsumed != 0 || dyConsumed != 0 || dxUnconsumed != 0 || dyUnconsumed != 0) { 20080 int startX = 0; 20081 int startY = 0; 20082 if (offsetInWindow != null) { 20083 getLocationInWindow(offsetInWindow); 20084 startX = offsetInWindow[0]; 20085 startY = offsetInWindow[1]; 20086 } 20087 20088 mNestedScrollingParent.onNestedScroll(this, dxConsumed, dyConsumed, 20089 dxUnconsumed, dyUnconsumed); 20090 20091 if (offsetInWindow != null) { 20092 getLocationInWindow(offsetInWindow); 20093 offsetInWindow[0] -= startX; 20094 offsetInWindow[1] -= startY; 20095 } 20096 return true; 20097 } else if (offsetInWindow != null) { 20098 // No motion, no dispatch. Keep offsetInWindow up to date. 20099 offsetInWindow[0] = 0; 20100 offsetInWindow[1] = 0; 20101 } 20102 } 20103 return false; 20104 } 20105 20106 /** 20107 * Dispatch one step of a nested scroll in progress before this view consumes any portion of it. 20108 * 20109 * <p>Nested pre-scroll events are to nested scroll events what touch intercept is to touch. 20110 * <code>dispatchNestedPreScroll</code> offers an opportunity for the parent view in a nested 20111 * scrolling operation to consume some or all of the scroll operation before the child view 20112 * consumes it.</p> 20113 * 20114 * @param dx Horizontal scroll distance in pixels 20115 * @param dy Vertical scroll distance in pixels 20116 * @param consumed Output. If not null, consumed[0] will contain the consumed component of dx 20117 * and consumed[1] the consumed dy. 20118 * @param offsetInWindow Optional. If not null, on return this will contain the offset 20119 * in local view coordinates of this view from before this operation 20120 * to after it completes. View implementations may use this to adjust 20121 * expected input coordinate tracking. 20122 * @return true if the parent consumed some or all of the scroll delta 20123 * @see #dispatchNestedScroll(int, int, int, int, int[]) 20124 */ 20125 public boolean dispatchNestedPreScroll(int dx, int dy, 20126 @Nullable @Size(2) int[] consumed, @Nullable @Size(2) int[] offsetInWindow) { 20127 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20128 if (dx != 0 || dy != 0) { 20129 int startX = 0; 20130 int startY = 0; 20131 if (offsetInWindow != null) { 20132 getLocationInWindow(offsetInWindow); 20133 startX = offsetInWindow[0]; 20134 startY = offsetInWindow[1]; 20135 } 20136 20137 if (consumed == null) { 20138 if (mTempNestedScrollConsumed == null) { 20139 mTempNestedScrollConsumed = new int[2]; 20140 } 20141 consumed = mTempNestedScrollConsumed; 20142 } 20143 consumed[0] = 0; 20144 consumed[1] = 0; 20145 mNestedScrollingParent.onNestedPreScroll(this, dx, dy, consumed); 20146 20147 if (offsetInWindow != null) { 20148 getLocationInWindow(offsetInWindow); 20149 offsetInWindow[0] -= startX; 20150 offsetInWindow[1] -= startY; 20151 } 20152 return consumed[0] != 0 || consumed[1] != 0; 20153 } else if (offsetInWindow != null) { 20154 offsetInWindow[0] = 0; 20155 offsetInWindow[1] = 0; 20156 } 20157 } 20158 return false; 20159 } 20160 20161 /** 20162 * Dispatch a fling to a nested scrolling parent. 20163 * 20164 * <p>This method should be used to indicate that a nested scrolling child has detected 20165 * suitable conditions for a fling. Generally this means that a touch scroll has ended with a 20166 * {@link VelocityTracker velocity} in the direction of scrolling that meets or exceeds 20167 * the {@link ViewConfiguration#getScaledMinimumFlingVelocity() minimum fling velocity} 20168 * along a scrollable axis.</p> 20169 * 20170 * <p>If a nested scrolling child view would normally fling but it is at the edge of 20171 * its own content, it can use this method to delegate the fling to its nested scrolling 20172 * parent instead. The parent may optionally consume the fling or observe a child fling.</p> 20173 * 20174 * @param velocityX Horizontal fling velocity in pixels per second 20175 * @param velocityY Vertical fling velocity in pixels per second 20176 * @param consumed true if the child consumed the fling, false otherwise 20177 * @return true if the nested scrolling parent consumed or otherwise reacted to the fling 20178 */ 20179 public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) { 20180 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20181 return mNestedScrollingParent.onNestedFling(this, velocityX, velocityY, consumed); 20182 } 20183 return false; 20184 } 20185 20186 /** 20187 * Dispatch a fling to a nested scrolling parent before it is processed by this view. 20188 * 20189 * <p>Nested pre-fling events are to nested fling events what touch intercept is to touch 20190 * and what nested pre-scroll is to nested scroll. <code>dispatchNestedPreFling</code> 20191 * offsets an opportunity for the parent view in a nested fling to fully consume the fling 20192 * before the child view consumes it. If this method returns <code>true</code>, a nested 20193 * parent view consumed the fling and this view should not scroll as a result.</p> 20194 * 20195 * <p>For a better user experience, only one view in a nested scrolling chain should consume 20196 * the fling at a time. If a parent view consumed the fling this method will return false. 20197 * Custom view implementations should account for this in two ways:</p> 20198 * 20199 * <ul> 20200 * <li>If a custom view is paged and needs to settle to a fixed page-point, do not 20201 * call <code>dispatchNestedPreFling</code>; consume the fling and settle to a valid 20202 * position regardless.</li> 20203 * <li>If a nested parent does consume the fling, this view should not scroll at all, 20204 * even to settle back to a valid idle position.</li> 20205 * </ul> 20206 * 20207 * <p>Views should also not offer fling velocities to nested parent views along an axis 20208 * where scrolling is not currently supported; a {@link android.widget.ScrollView ScrollView} 20209 * should not offer a horizontal fling velocity to its parents since scrolling along that 20210 * axis is not permitted and carrying velocity along that motion does not make sense.</p> 20211 * 20212 * @param velocityX Horizontal fling velocity in pixels per second 20213 * @param velocityY Vertical fling velocity in pixels per second 20214 * @return true if a nested scrolling parent consumed the fling 20215 */ 20216 public boolean dispatchNestedPreFling(float velocityX, float velocityY) { 20217 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20218 return mNestedScrollingParent.onNestedPreFling(this, velocityX, velocityY); 20219 } 20220 return false; 20221 } 20222 20223 /** 20224 * Gets a scale factor that determines the distance the view should scroll 20225 * vertically in response to {@link MotionEvent#ACTION_SCROLL}. 20226 * @return The vertical scroll scale factor. 20227 * @hide 20228 */ 20229 protected float getVerticalScrollFactor() { 20230 if (mVerticalScrollFactor == 0) { 20231 TypedValue outValue = new TypedValue(); 20232 if (!mContext.getTheme().resolveAttribute( 20233 com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { 20234 throw new IllegalStateException( 20235 "Expected theme to define listPreferredItemHeight."); 20236 } 20237 mVerticalScrollFactor = outValue.getDimension( 20238 mContext.getResources().getDisplayMetrics()); 20239 } 20240 return mVerticalScrollFactor; 20241 } 20242 20243 /** 20244 * Gets a scale factor that determines the distance the view should scroll 20245 * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. 20246 * @return The horizontal scroll scale factor. 20247 * @hide 20248 */ 20249 protected float getHorizontalScrollFactor() { 20250 // TODO: Should use something else. 20251 return getVerticalScrollFactor(); 20252 } 20253 20254 /** 20255 * Return the value specifying the text direction or policy that was set with 20256 * {@link #setTextDirection(int)}. 20257 * 20258 * @return the defined text direction. It can be one of: 20259 * 20260 * {@link #TEXT_DIRECTION_INHERIT}, 20261 * {@link #TEXT_DIRECTION_FIRST_STRONG}, 20262 * {@link #TEXT_DIRECTION_ANY_RTL}, 20263 * {@link #TEXT_DIRECTION_LTR}, 20264 * {@link #TEXT_DIRECTION_RTL}, 20265 * {@link #TEXT_DIRECTION_LOCALE}, 20266 * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, 20267 * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL} 20268 * 20269 * @attr ref android.R.styleable#View_textDirection 20270 * 20271 * @hide 20272 */ 20273 @ViewDebug.ExportedProperty(category = "text", mapping = { 20274 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 20275 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 20276 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 20277 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 20278 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 20279 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE"), 20280 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_LTR, to = "FIRST_STRONG_LTR"), 20281 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_RTL, to = "FIRST_STRONG_RTL") 20282 }) 20283 public int getRawTextDirection() { 20284 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_MASK) >> PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 20285 } 20286 20287 /** 20288 * Set the text direction. 20289 * 20290 * @param textDirection the direction to set. Should be one of: 20291 * 20292 * {@link #TEXT_DIRECTION_INHERIT}, 20293 * {@link #TEXT_DIRECTION_FIRST_STRONG}, 20294 * {@link #TEXT_DIRECTION_ANY_RTL}, 20295 * {@link #TEXT_DIRECTION_LTR}, 20296 * {@link #TEXT_DIRECTION_RTL}, 20297 * {@link #TEXT_DIRECTION_LOCALE} 20298 * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, 20299 * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL}, 20300 * 20301 * Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution 20302 * proceeds up the parent chain of the view to get the value. If there is no parent, then it will 20303 * return the default {@link #TEXT_DIRECTION_FIRST_STRONG}. 20304 * 20305 * @attr ref android.R.styleable#View_textDirection 20306 */ 20307 public void setTextDirection(int textDirection) { 20308 if (getRawTextDirection() != textDirection) { 20309 // Reset the current text direction and the resolved one 20310 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 20311 resetResolvedTextDirection(); 20312 // Set the new text direction 20313 mPrivateFlags2 |= ((textDirection << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) & PFLAG2_TEXT_DIRECTION_MASK); 20314 // Do resolution 20315 resolveTextDirection(); 20316 // Notify change 20317 onRtlPropertiesChanged(getLayoutDirection()); 20318 // Refresh 20319 requestLayout(); 20320 invalidate(true); 20321 } 20322 } 20323 20324 /** 20325 * Return the resolved text direction. 20326 * 20327 * @return the resolved text direction. Returns one of: 20328 * 20329 * {@link #TEXT_DIRECTION_FIRST_STRONG}, 20330 * {@link #TEXT_DIRECTION_ANY_RTL}, 20331 * {@link #TEXT_DIRECTION_LTR}, 20332 * {@link #TEXT_DIRECTION_RTL}, 20333 * {@link #TEXT_DIRECTION_LOCALE}, 20334 * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, 20335 * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL} 20336 * 20337 * @attr ref android.R.styleable#View_textDirection 20338 */ 20339 @ViewDebug.ExportedProperty(category = "text", mapping = { 20340 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 20341 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 20342 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 20343 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 20344 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 20345 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE"), 20346 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_LTR, to = "FIRST_STRONG_LTR"), 20347 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_RTL, to = "FIRST_STRONG_RTL") 20348 }) 20349 public int getTextDirection() { 20350 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED_MASK) >> PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 20351 } 20352 20353 /** 20354 * Resolve the text direction. 20355 * 20356 * @return true if resolution has been done, false otherwise. 20357 * 20358 * @hide 20359 */ 20360 public boolean resolveTextDirection() { 20361 // Reset any previous text direction resolution 20362 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 20363 20364 if (hasRtlSupport()) { 20365 // Set resolved text direction flag depending on text direction flag 20366 final int textDirection = getRawTextDirection(); 20367 switch(textDirection) { 20368 case TEXT_DIRECTION_INHERIT: 20369 if (!canResolveTextDirection()) { 20370 // We cannot do the resolution if there is no parent, so use the default one 20371 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20372 // Resolution will need to happen again later 20373 return false; 20374 } 20375 20376 // Parent has not yet resolved, so we still return the default 20377 try { 20378 if (!mParent.isTextDirectionResolved()) { 20379 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20380 // Resolution will need to happen again later 20381 return false; 20382 } 20383 } catch (AbstractMethodError e) { 20384 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20385 " does not fully implement ViewParent", e); 20386 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED | 20387 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20388 return true; 20389 } 20390 20391 // Set current resolved direction to the same value as the parent's one 20392 int parentResolvedDirection; 20393 try { 20394 parentResolvedDirection = mParent.getTextDirection(); 20395 } catch (AbstractMethodError e) { 20396 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20397 " does not fully implement ViewParent", e); 20398 parentResolvedDirection = TEXT_DIRECTION_LTR; 20399 } 20400 switch (parentResolvedDirection) { 20401 case TEXT_DIRECTION_FIRST_STRONG: 20402 case TEXT_DIRECTION_ANY_RTL: 20403 case TEXT_DIRECTION_LTR: 20404 case TEXT_DIRECTION_RTL: 20405 case TEXT_DIRECTION_LOCALE: 20406 case TEXT_DIRECTION_FIRST_STRONG_LTR: 20407 case TEXT_DIRECTION_FIRST_STRONG_RTL: 20408 mPrivateFlags2 |= 20409 (parentResolvedDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 20410 break; 20411 default: 20412 // Default resolved direction is "first strong" heuristic 20413 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20414 } 20415 break; 20416 case TEXT_DIRECTION_FIRST_STRONG: 20417 case TEXT_DIRECTION_ANY_RTL: 20418 case TEXT_DIRECTION_LTR: 20419 case TEXT_DIRECTION_RTL: 20420 case TEXT_DIRECTION_LOCALE: 20421 case TEXT_DIRECTION_FIRST_STRONG_LTR: 20422 case TEXT_DIRECTION_FIRST_STRONG_RTL: 20423 // Resolved direction is the same as text direction 20424 mPrivateFlags2 |= (textDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 20425 break; 20426 default: 20427 // Default resolved direction is "first strong" heuristic 20428 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20429 } 20430 } else { 20431 // Default resolved direction is "first strong" heuristic 20432 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20433 } 20434 20435 // Set to resolved 20436 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED; 20437 return true; 20438 } 20439 20440 /** 20441 * Check if text direction resolution can be done. 20442 * 20443 * @return true if text direction resolution can be done otherwise return false. 20444 */ 20445 public boolean canResolveTextDirection() { 20446 switch (getRawTextDirection()) { 20447 case TEXT_DIRECTION_INHERIT: 20448 if (mParent != null) { 20449 try { 20450 return mParent.canResolveTextDirection(); 20451 } catch (AbstractMethodError e) { 20452 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20453 " does not fully implement ViewParent", e); 20454 } 20455 } 20456 return false; 20457 20458 default: 20459 return true; 20460 } 20461 } 20462 20463 /** 20464 * Reset resolved text direction. Text direction will be resolved during a call to 20465 * {@link #onMeasure(int, int)}. 20466 * 20467 * @hide 20468 */ 20469 public void resetResolvedTextDirection() { 20470 // Reset any previous text direction resolution 20471 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 20472 // Set to default value 20473 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20474 } 20475 20476 /** 20477 * @return true if text direction is inherited. 20478 * 20479 * @hide 20480 */ 20481 public boolean isTextDirectionInherited() { 20482 return (getRawTextDirection() == TEXT_DIRECTION_INHERIT); 20483 } 20484 20485 /** 20486 * @return true if text direction is resolved. 20487 */ 20488 public boolean isTextDirectionResolved() { 20489 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED) == PFLAG2_TEXT_DIRECTION_RESOLVED; 20490 } 20491 20492 /** 20493 * Return the value specifying the text alignment or policy that was set with 20494 * {@link #setTextAlignment(int)}. 20495 * 20496 * @return the defined text alignment. It can be one of: 20497 * 20498 * {@link #TEXT_ALIGNMENT_INHERIT}, 20499 * {@link #TEXT_ALIGNMENT_GRAVITY}, 20500 * {@link #TEXT_ALIGNMENT_CENTER}, 20501 * {@link #TEXT_ALIGNMENT_TEXT_START}, 20502 * {@link #TEXT_ALIGNMENT_TEXT_END}, 20503 * {@link #TEXT_ALIGNMENT_VIEW_START}, 20504 * {@link #TEXT_ALIGNMENT_VIEW_END} 20505 * 20506 * @attr ref android.R.styleable#View_textAlignment 20507 * 20508 * @hide 20509 */ 20510 @ViewDebug.ExportedProperty(category = "text", mapping = { 20511 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 20512 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 20513 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 20514 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 20515 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 20516 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 20517 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 20518 }) 20519 @TextAlignment 20520 public int getRawTextAlignment() { 20521 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_MASK) >> PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 20522 } 20523 20524 /** 20525 * Set the text alignment. 20526 * 20527 * @param textAlignment The text alignment to set. Should be one of 20528 * 20529 * {@link #TEXT_ALIGNMENT_INHERIT}, 20530 * {@link #TEXT_ALIGNMENT_GRAVITY}, 20531 * {@link #TEXT_ALIGNMENT_CENTER}, 20532 * {@link #TEXT_ALIGNMENT_TEXT_START}, 20533 * {@link #TEXT_ALIGNMENT_TEXT_END}, 20534 * {@link #TEXT_ALIGNMENT_VIEW_START}, 20535 * {@link #TEXT_ALIGNMENT_VIEW_END} 20536 * 20537 * Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution 20538 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 20539 * will return the default {@link #TEXT_ALIGNMENT_GRAVITY}. 20540 * 20541 * @attr ref android.R.styleable#View_textAlignment 20542 */ 20543 public void setTextAlignment(@TextAlignment int textAlignment) { 20544 if (textAlignment != getRawTextAlignment()) { 20545 // Reset the current and resolved text alignment 20546 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 20547 resetResolvedTextAlignment(); 20548 // Set the new text alignment 20549 mPrivateFlags2 |= 20550 ((textAlignment << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) & PFLAG2_TEXT_ALIGNMENT_MASK); 20551 // Do resolution 20552 resolveTextAlignment(); 20553 // Notify change 20554 onRtlPropertiesChanged(getLayoutDirection()); 20555 // Refresh 20556 requestLayout(); 20557 invalidate(true); 20558 } 20559 } 20560 20561 /** 20562 * Return the resolved text alignment. 20563 * 20564 * @return the resolved text alignment. Returns one of: 20565 * 20566 * {@link #TEXT_ALIGNMENT_GRAVITY}, 20567 * {@link #TEXT_ALIGNMENT_CENTER}, 20568 * {@link #TEXT_ALIGNMENT_TEXT_START}, 20569 * {@link #TEXT_ALIGNMENT_TEXT_END}, 20570 * {@link #TEXT_ALIGNMENT_VIEW_START}, 20571 * {@link #TEXT_ALIGNMENT_VIEW_END} 20572 * 20573 * @attr ref android.R.styleable#View_textAlignment 20574 */ 20575 @ViewDebug.ExportedProperty(category = "text", mapping = { 20576 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 20577 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 20578 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 20579 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 20580 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 20581 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 20582 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 20583 }) 20584 @TextAlignment 20585 public int getTextAlignment() { 20586 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK) >> 20587 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 20588 } 20589 20590 /** 20591 * Resolve the text alignment. 20592 * 20593 * @return true if resolution has been done, false otherwise. 20594 * 20595 * @hide 20596 */ 20597 public boolean resolveTextAlignment() { 20598 // Reset any previous text alignment resolution 20599 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 20600 20601 if (hasRtlSupport()) { 20602 // Set resolved text alignment flag depending on text alignment flag 20603 final int textAlignment = getRawTextAlignment(); 20604 switch (textAlignment) { 20605 case TEXT_ALIGNMENT_INHERIT: 20606 // Check if we can resolve the text alignment 20607 if (!canResolveTextAlignment()) { 20608 // We cannot do the resolution if there is no parent so use the default 20609 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20610 // Resolution will need to happen again later 20611 return false; 20612 } 20613 20614 // Parent has not yet resolved, so we still return the default 20615 try { 20616 if (!mParent.isTextAlignmentResolved()) { 20617 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20618 // Resolution will need to happen again later 20619 return false; 20620 } 20621 } catch (AbstractMethodError e) { 20622 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20623 " does not fully implement ViewParent", e); 20624 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED | 20625 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20626 return true; 20627 } 20628 20629 int parentResolvedTextAlignment; 20630 try { 20631 parentResolvedTextAlignment = mParent.getTextAlignment(); 20632 } catch (AbstractMethodError e) { 20633 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20634 " does not fully implement ViewParent", e); 20635 parentResolvedTextAlignment = TEXT_ALIGNMENT_GRAVITY; 20636 } 20637 switch (parentResolvedTextAlignment) { 20638 case TEXT_ALIGNMENT_GRAVITY: 20639 case TEXT_ALIGNMENT_TEXT_START: 20640 case TEXT_ALIGNMENT_TEXT_END: 20641 case TEXT_ALIGNMENT_CENTER: 20642 case TEXT_ALIGNMENT_VIEW_START: 20643 case TEXT_ALIGNMENT_VIEW_END: 20644 // Resolved text alignment is the same as the parent resolved 20645 // text alignment 20646 mPrivateFlags2 |= 20647 (parentResolvedTextAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 20648 break; 20649 default: 20650 // Use default resolved text alignment 20651 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20652 } 20653 break; 20654 case TEXT_ALIGNMENT_GRAVITY: 20655 case TEXT_ALIGNMENT_TEXT_START: 20656 case TEXT_ALIGNMENT_TEXT_END: 20657 case TEXT_ALIGNMENT_CENTER: 20658 case TEXT_ALIGNMENT_VIEW_START: 20659 case TEXT_ALIGNMENT_VIEW_END: 20660 // Resolved text alignment is the same as text alignment 20661 mPrivateFlags2 |= (textAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 20662 break; 20663 default: 20664 // Use default resolved text alignment 20665 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20666 } 20667 } else { 20668 // Use default resolved text alignment 20669 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20670 } 20671 20672 // Set the resolved 20673 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED; 20674 return true; 20675 } 20676 20677 /** 20678 * Check if text alignment resolution can be done. 20679 * 20680 * @return true if text alignment resolution can be done otherwise return false. 20681 */ 20682 public boolean canResolveTextAlignment() { 20683 switch (getRawTextAlignment()) { 20684 case TEXT_DIRECTION_INHERIT: 20685 if (mParent != null) { 20686 try { 20687 return mParent.canResolveTextAlignment(); 20688 } catch (AbstractMethodError e) { 20689 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20690 " does not fully implement ViewParent", e); 20691 } 20692 } 20693 return false; 20694 20695 default: 20696 return true; 20697 } 20698 } 20699 20700 /** 20701 * Reset resolved text alignment. Text alignment will be resolved during a call to 20702 * {@link #onMeasure(int, int)}. 20703 * 20704 * @hide 20705 */ 20706 public void resetResolvedTextAlignment() { 20707 // Reset any previous text alignment resolution 20708 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 20709 // Set to default 20710 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20711 } 20712 20713 /** 20714 * @return true if text alignment is inherited. 20715 * 20716 * @hide 20717 */ 20718 public boolean isTextAlignmentInherited() { 20719 return (getRawTextAlignment() == TEXT_ALIGNMENT_INHERIT); 20720 } 20721 20722 /** 20723 * @return true if text alignment is resolved. 20724 */ 20725 public boolean isTextAlignmentResolved() { 20726 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED) == PFLAG2_TEXT_ALIGNMENT_RESOLVED; 20727 } 20728 20729 /** 20730 * Generate a value suitable for use in {@link #setId(int)}. 20731 * This value will not collide with ID values generated at build time by aapt for R.id. 20732 * 20733 * @return a generated ID value 20734 */ 20735 public static int generateViewId() { 20736 for (;;) { 20737 final int result = sNextGeneratedId.get(); 20738 // aapt-generated IDs have the high byte nonzero; clamp to the range under that. 20739 int newValue = result + 1; 20740 if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. 20741 if (sNextGeneratedId.compareAndSet(result, newValue)) { 20742 return result; 20743 } 20744 } 20745 } 20746 20747 /** 20748 * Gets the Views in the hierarchy affected by entering and exiting Activity Scene transitions. 20749 * @param transitioningViews This View will be added to transitioningViews if it is VISIBLE and 20750 * a normal View or a ViewGroup with 20751 * {@link android.view.ViewGroup#isTransitionGroup()} true. 20752 * @hide 20753 */ 20754 public void captureTransitioningViews(List<View> transitioningViews) { 20755 if (getVisibility() == View.VISIBLE) { 20756 transitioningViews.add(this); 20757 } 20758 } 20759 20760 /** 20761 * Adds all Views that have {@link #getTransitionName()} non-null to namedElements. 20762 * @param namedElements Will contain all Views in the hierarchy having a transitionName. 20763 * @hide 20764 */ 20765 public void findNamedViews(Map<String, View> namedElements) { 20766 if (getVisibility() == VISIBLE || mGhostView != null) { 20767 String transitionName = getTransitionName(); 20768 if (transitionName != null) { 20769 namedElements.put(transitionName, this); 20770 } 20771 } 20772 } 20773 20774 // 20775 // Properties 20776 // 20777 /** 20778 * A Property wrapper around the <code>alpha</code> functionality handled by the 20779 * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. 20780 */ 20781 public static final Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { 20782 @Override 20783 public void setValue(View object, float value) { 20784 object.setAlpha(value); 20785 } 20786 20787 @Override 20788 public Float get(View object) { 20789 return object.getAlpha(); 20790 } 20791 }; 20792 20793 /** 20794 * A Property wrapper around the <code>translationX</code> functionality handled by the 20795 * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. 20796 */ 20797 public static final Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { 20798 @Override 20799 public void setValue(View object, float value) { 20800 object.setTranslationX(value); 20801 } 20802 20803 @Override 20804 public Float get(View object) { 20805 return object.getTranslationX(); 20806 } 20807 }; 20808 20809 /** 20810 * A Property wrapper around the <code>translationY</code> functionality handled by the 20811 * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. 20812 */ 20813 public static final Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { 20814 @Override 20815 public void setValue(View object, float value) { 20816 object.setTranslationY(value); 20817 } 20818 20819 @Override 20820 public Float get(View object) { 20821 return object.getTranslationY(); 20822 } 20823 }; 20824 20825 /** 20826 * A Property wrapper around the <code>translationZ</code> functionality handled by the 20827 * {@link View#setTranslationZ(float)} and {@link View#getTranslationZ()} methods. 20828 */ 20829 public static final Property<View, Float> TRANSLATION_Z = new FloatProperty<View>("translationZ") { 20830 @Override 20831 public void setValue(View object, float value) { 20832 object.setTranslationZ(value); 20833 } 20834 20835 @Override 20836 public Float get(View object) { 20837 return object.getTranslationZ(); 20838 } 20839 }; 20840 20841 /** 20842 * A Property wrapper around the <code>x</code> functionality handled by the 20843 * {@link View#setX(float)} and {@link View#getX()} methods. 20844 */ 20845 public static final Property<View, Float> X = new FloatProperty<View>("x") { 20846 @Override 20847 public void setValue(View object, float value) { 20848 object.setX(value); 20849 } 20850 20851 @Override 20852 public Float get(View object) { 20853 return object.getX(); 20854 } 20855 }; 20856 20857 /** 20858 * A Property wrapper around the <code>y</code> functionality handled by the 20859 * {@link View#setY(float)} and {@link View#getY()} methods. 20860 */ 20861 public static final Property<View, Float> Y = new FloatProperty<View>("y") { 20862 @Override 20863 public void setValue(View object, float value) { 20864 object.setY(value); 20865 } 20866 20867 @Override 20868 public Float get(View object) { 20869 return object.getY(); 20870 } 20871 }; 20872 20873 /** 20874 * A Property wrapper around the <code>z</code> functionality handled by the 20875 * {@link View#setZ(float)} and {@link View#getZ()} methods. 20876 */ 20877 public static final Property<View, Float> Z = new FloatProperty<View>("z") { 20878 @Override 20879 public void setValue(View object, float value) { 20880 object.setZ(value); 20881 } 20882 20883 @Override 20884 public Float get(View object) { 20885 return object.getZ(); 20886 } 20887 }; 20888 20889 /** 20890 * A Property wrapper around the <code>rotation</code> functionality handled by the 20891 * {@link View#setRotation(float)} and {@link View#getRotation()} methods. 20892 */ 20893 public static final Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { 20894 @Override 20895 public void setValue(View object, float value) { 20896 object.setRotation(value); 20897 } 20898 20899 @Override 20900 public Float get(View object) { 20901 return object.getRotation(); 20902 } 20903 }; 20904 20905 /** 20906 * A Property wrapper around the <code>rotationX</code> functionality handled by the 20907 * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. 20908 */ 20909 public static final Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { 20910 @Override 20911 public void setValue(View object, float value) { 20912 object.setRotationX(value); 20913 } 20914 20915 @Override 20916 public Float get(View object) { 20917 return object.getRotationX(); 20918 } 20919 }; 20920 20921 /** 20922 * A Property wrapper around the <code>rotationY</code> functionality handled by the 20923 * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. 20924 */ 20925 public static final Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { 20926 @Override 20927 public void setValue(View object, float value) { 20928 object.setRotationY(value); 20929 } 20930 20931 @Override 20932 public Float get(View object) { 20933 return object.getRotationY(); 20934 } 20935 }; 20936 20937 /** 20938 * A Property wrapper around the <code>scaleX</code> functionality handled by the 20939 * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. 20940 */ 20941 public static final Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { 20942 @Override 20943 public void setValue(View object, float value) { 20944 object.setScaleX(value); 20945 } 20946 20947 @Override 20948 public Float get(View object) { 20949 return object.getScaleX(); 20950 } 20951 }; 20952 20953 /** 20954 * A Property wrapper around the <code>scaleY</code> functionality handled by the 20955 * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. 20956 */ 20957 public static final Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { 20958 @Override 20959 public void setValue(View object, float value) { 20960 object.setScaleY(value); 20961 } 20962 20963 @Override 20964 public Float get(View object) { 20965 return object.getScaleY(); 20966 } 20967 }; 20968 20969 /** 20970 * A MeasureSpec encapsulates the layout requirements passed from parent to child. 20971 * Each MeasureSpec represents a requirement for either the width or the height. 20972 * A MeasureSpec is comprised of a size and a mode. There are three possible 20973 * modes: 20974 * <dl> 20975 * <dt>UNSPECIFIED</dt> 20976 * <dd> 20977 * The parent has not imposed any constraint on the child. It can be whatever size 20978 * it wants. 20979 * </dd> 20980 * 20981 * <dt>EXACTLY</dt> 20982 * <dd> 20983 * The parent has determined an exact size for the child. The child is going to be 20984 * given those bounds regardless of how big it wants to be. 20985 * </dd> 20986 * 20987 * <dt>AT_MOST</dt> 20988 * <dd> 20989 * The child can be as large as it wants up to the specified size. 20990 * </dd> 20991 * </dl> 20992 * 20993 * MeasureSpecs are implemented as ints to reduce object allocation. This class 20994 * is provided to pack and unpack the <size, mode> tuple into the int. 20995 */ 20996 public static class MeasureSpec { 20997 private static final int MODE_SHIFT = 30; 20998 private static final int MODE_MASK = 0x3 << MODE_SHIFT; 20999 21000 /** 21001 * Measure specification mode: The parent has not imposed any constraint 21002 * on the child. It can be whatever size it wants. 21003 */ 21004 public static final int UNSPECIFIED = 0 << MODE_SHIFT; 21005 21006 /** 21007 * Measure specification mode: The parent has determined an exact size 21008 * for the child. The child is going to be given those bounds regardless 21009 * of how big it wants to be. 21010 */ 21011 public static final int EXACTLY = 1 << MODE_SHIFT; 21012 21013 /** 21014 * Measure specification mode: The child can be as large as it wants up 21015 * to the specified size. 21016 */ 21017 public static final int AT_MOST = 2 << MODE_SHIFT; 21018 21019 /** 21020 * Creates a measure specification based on the supplied size and mode. 21021 * 21022 * The mode must always be one of the following: 21023 * <ul> 21024 * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> 21025 * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> 21026 * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> 21027 * </ul> 21028 * 21029 * <p><strong>Note:</strong> On API level 17 and lower, makeMeasureSpec's 21030 * implementation was such that the order of arguments did not matter 21031 * and overflow in either value could impact the resulting MeasureSpec. 21032 * {@link android.widget.RelativeLayout} was affected by this bug. 21033 * Apps targeting API levels greater than 17 will get the fixed, more strict 21034 * behavior.</p> 21035 * 21036 * @param size the size of the measure specification 21037 * @param mode the mode of the measure specification 21038 * @return the measure specification based on size and mode 21039 */ 21040 public static int makeMeasureSpec(int size, int mode) { 21041 if (sUseBrokenMakeMeasureSpec) { 21042 return size + mode; 21043 } else { 21044 return (size & ~MODE_MASK) | (mode & MODE_MASK); 21045 } 21046 } 21047 21048 /** 21049 * Like {@link #makeMeasureSpec(int, int)}, but any spec with a mode of UNSPECIFIED 21050 * will automatically get a size of 0. Older apps expect this. 21051 * 21052 * @hide internal use only for compatibility with system widgets and older apps 21053 */ 21054 public static int makeSafeMeasureSpec(int size, int mode) { 21055 if (sUseZeroUnspecifiedMeasureSpec && mode == UNSPECIFIED) { 21056 return 0; 21057 } 21058 return makeMeasureSpec(size, mode); 21059 } 21060 21061 /** 21062 * Extracts the mode from the supplied measure specification. 21063 * 21064 * @param measureSpec the measure specification to extract the mode from 21065 * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, 21066 * {@link android.view.View.MeasureSpec#AT_MOST} or 21067 * {@link android.view.View.MeasureSpec#EXACTLY} 21068 */ 21069 public static int getMode(int measureSpec) { 21070 return (measureSpec & MODE_MASK); 21071 } 21072 21073 /** 21074 * Extracts the size from the supplied measure specification. 21075 * 21076 * @param measureSpec the measure specification to extract the size from 21077 * @return the size in pixels defined in the supplied measure specification 21078 */ 21079 public static int getSize(int measureSpec) { 21080 return (measureSpec & ~MODE_MASK); 21081 } 21082 21083 static int adjust(int measureSpec, int delta) { 21084 final int mode = getMode(measureSpec); 21085 int size = getSize(measureSpec); 21086 if (mode == UNSPECIFIED) { 21087 // No need to adjust size for UNSPECIFIED mode. 21088 return makeMeasureSpec(size, UNSPECIFIED); 21089 } 21090 size += delta; 21091 if (size < 0) { 21092 Log.e(VIEW_LOG_TAG, "MeasureSpec.adjust: new size would be negative! (" + size + 21093 ") spec: " + toString(measureSpec) + " delta: " + delta); 21094 size = 0; 21095 } 21096 return makeMeasureSpec(size, mode); 21097 } 21098 21099 /** 21100 * Returns a String representation of the specified measure 21101 * specification. 21102 * 21103 * @param measureSpec the measure specification to convert to a String 21104 * @return a String with the following format: "MeasureSpec: MODE SIZE" 21105 */ 21106 public static String toString(int measureSpec) { 21107 int mode = getMode(measureSpec); 21108 int size = getSize(measureSpec); 21109 21110 StringBuilder sb = new StringBuilder("MeasureSpec: "); 21111 21112 if (mode == UNSPECIFIED) 21113 sb.append("UNSPECIFIED "); 21114 else if (mode == EXACTLY) 21115 sb.append("EXACTLY "); 21116 else if (mode == AT_MOST) 21117 sb.append("AT_MOST "); 21118 else 21119 sb.append(mode).append(" "); 21120 21121 sb.append(size); 21122 return sb.toString(); 21123 } 21124 } 21125 21126 private final class CheckForLongPress implements Runnable { 21127 private int mOriginalWindowAttachCount; 21128 21129 @Override 21130 public void run() { 21131 if (isPressed() && (mParent != null) 21132 && mOriginalWindowAttachCount == mWindowAttachCount) { 21133 if (performLongClick()) { 21134 mHasPerformedLongPress = true; 21135 } 21136 } 21137 } 21138 21139 public void rememberWindowAttachCount() { 21140 mOriginalWindowAttachCount = mWindowAttachCount; 21141 } 21142 } 21143 21144 private final class CheckForTap implements Runnable { 21145 public float x; 21146 public float y; 21147 21148 @Override 21149 public void run() { 21150 mPrivateFlags &= ~PFLAG_PREPRESSED; 21151 setPressed(true, x, y); 21152 checkForLongClick(ViewConfiguration.getTapTimeout()); 21153 } 21154 } 21155 21156 private final class PerformClick implements Runnable { 21157 @Override 21158 public void run() { 21159 performClick(); 21160 } 21161 } 21162 21163 /** @hide */ 21164 public void hackTurnOffWindowResizeAnim(boolean off) { 21165 mAttachInfo.mTurnOffWindowResizeAnim = off; 21166 } 21167 21168 /** 21169 * This method returns a ViewPropertyAnimator object, which can be used to animate 21170 * specific properties on this View. 21171 * 21172 * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. 21173 */ 21174 public ViewPropertyAnimator animate() { 21175 if (mAnimator == null) { 21176 mAnimator = new ViewPropertyAnimator(this); 21177 } 21178 return mAnimator; 21179 } 21180 21181 /** 21182 * Sets the name of the View to be used to identify Views in Transitions. 21183 * Names should be unique in the View hierarchy. 21184 * 21185 * @param transitionName The name of the View to uniquely identify it for Transitions. 21186 */ 21187 public final void setTransitionName(String transitionName) { 21188 mTransitionName = transitionName; 21189 } 21190 21191 /** 21192 * Returns the name of the View to be used to identify Views in Transitions. 21193 * Names should be unique in the View hierarchy. 21194 * 21195 * <p>This returns null if the View has not been given a name.</p> 21196 * 21197 * @return The name used of the View to be used to identify Views in Transitions or null 21198 * if no name has been given. 21199 */ 21200 @ViewDebug.ExportedProperty 21201 public String getTransitionName() { 21202 return mTransitionName; 21203 } 21204 21205 /** 21206 * Interface definition for a callback to be invoked when a hardware key event is 21207 * dispatched to this view. The callback will be invoked before the key event is 21208 * given to the view. This is only useful for hardware keyboards; a software input 21209 * method has no obligation to trigger this listener. 21210 */ 21211 public interface OnKeyListener { 21212 /** 21213 * Called when a hardware key is dispatched to a view. This allows listeners to 21214 * get a chance to respond before the target view. 21215 * <p>Key presses in software keyboards will generally NOT trigger this method, 21216 * although some may elect to do so in some situations. Do not assume a 21217 * software input method has to be key-based; even if it is, it may use key presses 21218 * in a different way than you expect, so there is no way to reliably catch soft 21219 * input key presses. 21220 * 21221 * @param v The view the key has been dispatched to. 21222 * @param keyCode The code for the physical key that was pressed 21223 * @param event The KeyEvent object containing full information about 21224 * the event. 21225 * @return True if the listener has consumed the event, false otherwise. 21226 */ 21227 boolean onKey(View v, int keyCode, KeyEvent event); 21228 } 21229 21230 /** 21231 * Interface definition for a callback to be invoked when a touch event is 21232 * dispatched to this view. The callback will be invoked before the touch 21233 * event is given to the view. 21234 */ 21235 public interface OnTouchListener { 21236 /** 21237 * Called when a touch event is dispatched to a view. This allows listeners to 21238 * get a chance to respond before the target view. 21239 * 21240 * @param v The view the touch event has been dispatched to. 21241 * @param event The MotionEvent object containing full information about 21242 * the event. 21243 * @return True if the listener has consumed the event, false otherwise. 21244 */ 21245 boolean onTouch(View v, MotionEvent event); 21246 } 21247 21248 /** 21249 * Interface definition for a callback to be invoked when a hover event is 21250 * dispatched to this view. The callback will be invoked before the hover 21251 * event is given to the view. 21252 */ 21253 public interface OnHoverListener { 21254 /** 21255 * Called when a hover event is dispatched to a view. This allows listeners to 21256 * get a chance to respond before the target view. 21257 * 21258 * @param v The view the hover event has been dispatched to. 21259 * @param event The MotionEvent object containing full information about 21260 * the event. 21261 * @return True if the listener has consumed the event, false otherwise. 21262 */ 21263 boolean onHover(View v, MotionEvent event); 21264 } 21265 21266 /** 21267 * Interface definition for a callback to be invoked when a generic motion event is 21268 * dispatched to this view. The callback will be invoked before the generic motion 21269 * event is given to the view. 21270 */ 21271 public interface OnGenericMotionListener { 21272 /** 21273 * Called when a generic motion event is dispatched to a view. This allows listeners to 21274 * get a chance to respond before the target view. 21275 * 21276 * @param v The view the generic motion event has been dispatched to. 21277 * @param event The MotionEvent object containing full information about 21278 * the event. 21279 * @return True if the listener has consumed the event, false otherwise. 21280 */ 21281 boolean onGenericMotion(View v, MotionEvent event); 21282 } 21283 21284 /** 21285 * Interface definition for a callback to be invoked when a view has been clicked and held. 21286 */ 21287 public interface OnLongClickListener { 21288 /** 21289 * Called when a view has been clicked and held. 21290 * 21291 * @param v The view that was clicked and held. 21292 * 21293 * @return true if the callback consumed the long click, false otherwise. 21294 */ 21295 boolean onLongClick(View v); 21296 } 21297 21298 /** 21299 * Interface definition for a callback to be invoked when a drag is being dispatched 21300 * to this view. The callback will be invoked before the hosting view's own 21301 * onDrag(event) method. If the listener wants to fall back to the hosting view's 21302 * onDrag(event) behavior, it should return 'false' from this callback. 21303 * 21304 * <div class="special reference"> 21305 * <h3>Developer Guides</h3> 21306 * <p>For a guide to implementing drag and drop features, read the 21307 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 21308 * </div> 21309 */ 21310 public interface OnDragListener { 21311 /** 21312 * Called when a drag event is dispatched to a view. This allows listeners 21313 * to get a chance to override base View behavior. 21314 * 21315 * @param v The View that received the drag event. 21316 * @param event The {@link android.view.DragEvent} object for the drag event. 21317 * @return {@code true} if the drag event was handled successfully, or {@code false} 21318 * if the drag event was not handled. Note that {@code false} will trigger the View 21319 * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. 21320 */ 21321 boolean onDrag(View v, DragEvent event); 21322 } 21323 21324 /** 21325 * Interface definition for a callback to be invoked when the focus state of 21326 * a view changed. 21327 */ 21328 public interface OnFocusChangeListener { 21329 /** 21330 * Called when the focus state of a view has changed. 21331 * 21332 * @param v The view whose state has changed. 21333 * @param hasFocus The new focus state of v. 21334 */ 21335 void onFocusChange(View v, boolean hasFocus); 21336 } 21337 21338 /** 21339 * Interface definition for a callback to be invoked when a view is clicked. 21340 */ 21341 public interface OnClickListener { 21342 /** 21343 * Called when a view has been clicked. 21344 * 21345 * @param v The view that was clicked. 21346 */ 21347 void onClick(View v); 21348 } 21349 21350 /** 21351 * Interface definition for a callback to be invoked when a view is context clicked. 21352 */ 21353 public interface OnContextClickListener { 21354 /** 21355 * Called when a view is context clicked. 21356 * 21357 * @param v The view that has been context clicked. 21358 * @return true if the callback consumed the context click, false otherwise. 21359 */ 21360 boolean onContextClick(View v); 21361 } 21362 21363 /** 21364 * Interface definition for a callback to be invoked when the context menu 21365 * for this view is being built. 21366 */ 21367 public interface OnCreateContextMenuListener { 21368 /** 21369 * Called when the context menu for this view is being built. It is not 21370 * safe to hold onto the menu after this method returns. 21371 * 21372 * @param menu The context menu that is being built 21373 * @param v The view for which the context menu is being built 21374 * @param menuInfo Extra information about the item for which the 21375 * context menu should be shown. This information will vary 21376 * depending on the class of v. 21377 */ 21378 void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); 21379 } 21380 21381 /** 21382 * Interface definition for a callback to be invoked when the status bar changes 21383 * visibility. This reports <strong>global</strong> changes to the system UI 21384 * state, not what the application is requesting. 21385 * 21386 * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) 21387 */ 21388 public interface OnSystemUiVisibilityChangeListener { 21389 /** 21390 * Called when the status bar changes visibility because of a call to 21391 * {@link View#setSystemUiVisibility(int)}. 21392 * 21393 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 21394 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, and {@link #SYSTEM_UI_FLAG_FULLSCREEN}. 21395 * This tells you the <strong>global</strong> state of these UI visibility 21396 * flags, not what your app is currently applying. 21397 */ 21398 public void onSystemUiVisibilityChange(int visibility); 21399 } 21400 21401 /** 21402 * Interface definition for a callback to be invoked when this view is attached 21403 * or detached from its window. 21404 */ 21405 public interface OnAttachStateChangeListener { 21406 /** 21407 * Called when the view is attached to a window. 21408 * @param v The view that was attached 21409 */ 21410 public void onViewAttachedToWindow(View v); 21411 /** 21412 * Called when the view is detached from a window. 21413 * @param v The view that was detached 21414 */ 21415 public void onViewDetachedFromWindow(View v); 21416 } 21417 21418 /** 21419 * Listener for applying window insets on a view in a custom way. 21420 * 21421 * <p>Apps may choose to implement this interface if they want to apply custom policy 21422 * to the way that window insets are treated for a view. If an OnApplyWindowInsetsListener 21423 * is set, its 21424 * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} 21425 * method will be called instead of the View's own 21426 * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. The listener 21427 * may optionally call the parameter View's <code>onApplyWindowInsets</code> method to apply 21428 * the View's normal behavior as part of its own.</p> 21429 */ 21430 public interface OnApplyWindowInsetsListener { 21431 /** 21432 * When {@link View#setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) set} 21433 * on a View, this listener method will be called instead of the view's own 21434 * {@link View#onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. 21435 * 21436 * @param v The view applying window insets 21437 * @param insets The insets to apply 21438 * @return The insets supplied, minus any insets that were consumed 21439 */ 21440 public WindowInsets onApplyWindowInsets(View v, WindowInsets insets); 21441 } 21442 21443 private final class UnsetPressedState implements Runnable { 21444 @Override 21445 public void run() { 21446 setPressed(false); 21447 } 21448 } 21449 21450 /** 21451 * Base class for derived classes that want to save and restore their own 21452 * state in {@link android.view.View#onSaveInstanceState()}. 21453 */ 21454 public static class BaseSavedState extends AbsSavedState { 21455 String mStartActivityRequestWhoSaved; 21456 21457 /** 21458 * Constructor used when reading from a parcel. Reads the state of the superclass. 21459 * 21460 * @param source 21461 */ 21462 public BaseSavedState(Parcel source) { 21463 super(source); 21464 mStartActivityRequestWhoSaved = source.readString(); 21465 } 21466 21467 /** 21468 * Constructor called by derived classes when creating their SavedState objects 21469 * 21470 * @param superState The state of the superclass of this view 21471 */ 21472 public BaseSavedState(Parcelable superState) { 21473 super(superState); 21474 } 21475 21476 @Override 21477 public void writeToParcel(Parcel out, int flags) { 21478 super.writeToParcel(out, flags); 21479 out.writeString(mStartActivityRequestWhoSaved); 21480 } 21481 21482 public static final Parcelable.Creator<BaseSavedState> CREATOR = 21483 new Parcelable.Creator<BaseSavedState>() { 21484 public BaseSavedState createFromParcel(Parcel in) { 21485 return new BaseSavedState(in); 21486 } 21487 21488 public BaseSavedState[] newArray(int size) { 21489 return new BaseSavedState[size]; 21490 } 21491 }; 21492 } 21493 21494 /** 21495 * A set of information given to a view when it is attached to its parent 21496 * window. 21497 */ 21498 final static class AttachInfo { 21499 interface Callbacks { 21500 void playSoundEffect(int effectId); 21501 boolean performHapticFeedback(int effectId, boolean always); 21502 } 21503 21504 /** 21505 * InvalidateInfo is used to post invalidate(int, int, int, int) messages 21506 * to a Handler. This class contains the target (View) to invalidate and 21507 * the coordinates of the dirty rectangle. 21508 * 21509 * For performance purposes, this class also implements a pool of up to 21510 * POOL_LIMIT objects that get reused. This reduces memory allocations 21511 * whenever possible. 21512 */ 21513 static class InvalidateInfo { 21514 private static final int POOL_LIMIT = 10; 21515 21516 private static final SynchronizedPool<InvalidateInfo> sPool = 21517 new SynchronizedPool<InvalidateInfo>(POOL_LIMIT); 21518 21519 View target; 21520 21521 int left; 21522 int top; 21523 int right; 21524 int bottom; 21525 21526 public static InvalidateInfo obtain() { 21527 InvalidateInfo instance = sPool.acquire(); 21528 return (instance != null) ? instance : new InvalidateInfo(); 21529 } 21530 21531 public void recycle() { 21532 target = null; 21533 sPool.release(this); 21534 } 21535 } 21536 21537 final IWindowSession mSession; 21538 21539 final IWindow mWindow; 21540 21541 final IBinder mWindowToken; 21542 21543 final Display mDisplay; 21544 21545 final Callbacks mRootCallbacks; 21546 21547 IWindowId mIWindowId; 21548 WindowId mWindowId; 21549 21550 /** 21551 * The top view of the hierarchy. 21552 */ 21553 View mRootView; 21554 21555 IBinder mPanelParentWindowToken; 21556 21557 boolean mHardwareAccelerated; 21558 boolean mHardwareAccelerationRequested; 21559 HardwareRenderer mHardwareRenderer; 21560 List<RenderNode> mPendingAnimatingRenderNodes; 21561 21562 /** 21563 * The state of the display to which the window is attached, as reported 21564 * by {@link Display#getState()}. Note that the display state constants 21565 * declared by {@link Display} do not exactly line up with the screen state 21566 * constants declared by {@link View} (there are more display states than 21567 * screen states). 21568 */ 21569 int mDisplayState = Display.STATE_UNKNOWN; 21570 21571 /** 21572 * Scale factor used by the compatibility mode 21573 */ 21574 float mApplicationScale; 21575 21576 /** 21577 * Indicates whether the application is in compatibility mode 21578 */ 21579 boolean mScalingRequired; 21580 21581 /** 21582 * If set, ViewRootImpl doesn't use its lame animation for when the window resizes. 21583 */ 21584 boolean mTurnOffWindowResizeAnim; 21585 21586 /** 21587 * Left position of this view's window 21588 */ 21589 int mWindowLeft; 21590 21591 /** 21592 * Top position of this view's window 21593 */ 21594 int mWindowTop; 21595 21596 /** 21597 * Indicates whether views need to use 32-bit drawing caches 21598 */ 21599 boolean mUse32BitDrawingCache; 21600 21601 /** 21602 * For windows that are full-screen but using insets to layout inside 21603 * of the screen areas, these are the current insets to appear inside 21604 * the overscan area of the display. 21605 */ 21606 final Rect mOverscanInsets = new Rect(); 21607 21608 /** 21609 * For windows that are full-screen but using insets to layout inside 21610 * of the screen decorations, these are the current insets for the 21611 * content of the window. 21612 */ 21613 final Rect mContentInsets = new Rect(); 21614 21615 /** 21616 * For windows that are full-screen but using insets to layout inside 21617 * of the screen decorations, these are the current insets for the 21618 * actual visible parts of the window. 21619 */ 21620 final Rect mVisibleInsets = new Rect(); 21621 21622 /** 21623 * For windows that are full-screen but using insets to layout inside 21624 * of the screen decorations, these are the current insets for the 21625 * stable system windows. 21626 */ 21627 final Rect mStableInsets = new Rect(); 21628 21629 /** 21630 * For windows that include areas that are not covered by real surface these are the outsets 21631 * for real surface. 21632 */ 21633 final Rect mOutsets = new Rect(); 21634 21635 /** 21636 * The internal insets given by this window. This value is 21637 * supplied by the client (through 21638 * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will 21639 * be given to the window manager when changed to be used in laying 21640 * out windows behind it. 21641 */ 21642 final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets 21643 = new ViewTreeObserver.InternalInsetsInfo(); 21644 21645 /** 21646 * Set to true when mGivenInternalInsets is non-empty. 21647 */ 21648 boolean mHasNonEmptyGivenInternalInsets; 21649 21650 /** 21651 * All views in the window's hierarchy that serve as scroll containers, 21652 * used to determine if the window can be resized or must be panned 21653 * to adjust for a soft input area. 21654 */ 21655 final ArrayList<View> mScrollContainers = new ArrayList<View>(); 21656 21657 final KeyEvent.DispatcherState mKeyDispatchState 21658 = new KeyEvent.DispatcherState(); 21659 21660 /** 21661 * Indicates whether the view's window currently has the focus. 21662 */ 21663 boolean mHasWindowFocus; 21664 21665 /** 21666 * The current visibility of the window. 21667 */ 21668 int mWindowVisibility; 21669 21670 /** 21671 * Indicates the time at which drawing started to occur. 21672 */ 21673 long mDrawingTime; 21674 21675 /** 21676 * Indicates whether or not ignoring the DIRTY_MASK flags. 21677 */ 21678 boolean mIgnoreDirtyState; 21679 21680 /** 21681 * This flag tracks when the mIgnoreDirtyState flag is set during draw(), 21682 * to avoid clearing that flag prematurely. 21683 */ 21684 boolean mSetIgnoreDirtyState = false; 21685 21686 /** 21687 * Indicates whether the view's window is currently in touch mode. 21688 */ 21689 boolean mInTouchMode; 21690 21691 /** 21692 * Indicates whether the view has requested unbuffered input dispatching for the current 21693 * event stream. 21694 */ 21695 boolean mUnbufferedDispatchRequested; 21696 21697 /** 21698 * Indicates that ViewAncestor should trigger a global layout change 21699 * the next time it performs a traversal 21700 */ 21701 boolean mRecomputeGlobalAttributes; 21702 21703 /** 21704 * Always report new attributes at next traversal. 21705 */ 21706 boolean mForceReportNewAttributes; 21707 21708 /** 21709 * Set during a traveral if any views want to keep the screen on. 21710 */ 21711 boolean mKeepScreenOn; 21712 21713 /** 21714 * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). 21715 */ 21716 int mSystemUiVisibility; 21717 21718 /** 21719 * Hack to force certain system UI visibility flags to be cleared. 21720 */ 21721 int mDisabledSystemUiVisibility; 21722 21723 /** 21724 * Last global system UI visibility reported by the window manager. 21725 */ 21726 int mGlobalSystemUiVisibility; 21727 21728 /** 21729 * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener 21730 * attached. 21731 */ 21732 boolean mHasSystemUiListeners; 21733 21734 /** 21735 * Set if the window has requested to extend into the overscan region 21736 * via WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN. 21737 */ 21738 boolean mOverscanRequested; 21739 21740 /** 21741 * Set if the visibility of any views has changed. 21742 */ 21743 boolean mViewVisibilityChanged; 21744 21745 /** 21746 * Set to true if a view has been scrolled. 21747 */ 21748 boolean mViewScrollChanged; 21749 21750 /** 21751 * Set to true if high contrast mode enabled 21752 */ 21753 boolean mHighContrastText; 21754 21755 /** 21756 * Global to the view hierarchy used as a temporary for dealing with 21757 * x/y points in the transparent region computations. 21758 */ 21759 final int[] mTransparentLocation = new int[2]; 21760 21761 /** 21762 * Global to the view hierarchy used as a temporary for dealing with 21763 * x/y points in the ViewGroup.invalidateChild implementation. 21764 */ 21765 final int[] mInvalidateChildLocation = new int[2]; 21766 21767 /** 21768 * Global to the view hierarchy used as a temporary for dealng with 21769 * computing absolute on-screen location. 21770 */ 21771 final int[] mTmpLocation = new int[2]; 21772 21773 /** 21774 * Global to the view hierarchy used as a temporary for dealing with 21775 * x/y location when view is transformed. 21776 */ 21777 final float[] mTmpTransformLocation = new float[2]; 21778 21779 /** 21780 * The view tree observer used to dispatch global events like 21781 * layout, pre-draw, touch mode change, etc. 21782 */ 21783 final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); 21784 21785 /** 21786 * A Canvas used by the view hierarchy to perform bitmap caching. 21787 */ 21788 Canvas mCanvas; 21789 21790 /** 21791 * The view root impl. 21792 */ 21793 final ViewRootImpl mViewRootImpl; 21794 21795 /** 21796 * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This 21797 * handler can be used to pump events in the UI events queue. 21798 */ 21799 final Handler mHandler; 21800 21801 /** 21802 * Temporary for use in computing invalidate rectangles while 21803 * calling up the hierarchy. 21804 */ 21805 final Rect mTmpInvalRect = new Rect(); 21806 21807 /** 21808 * Temporary for use in computing hit areas with transformed views 21809 */ 21810 final RectF mTmpTransformRect = new RectF(); 21811 21812 /** 21813 * Temporary for use in computing hit areas with transformed views 21814 */ 21815 final RectF mTmpTransformRect1 = new RectF(); 21816 21817 /** 21818 * Temporary list of rectanges. 21819 */ 21820 final List<RectF> mTmpRectList = new ArrayList<>(); 21821 21822 /** 21823 * Temporary for use in transforming invalidation rect 21824 */ 21825 final Matrix mTmpMatrix = new Matrix(); 21826 21827 /** 21828 * Temporary for use in transforming invalidation rect 21829 */ 21830 final Transformation mTmpTransformation = new Transformation(); 21831 21832 /** 21833 * Temporary for use in querying outlines from OutlineProviders 21834 */ 21835 final Outline mTmpOutline = new Outline(); 21836 21837 /** 21838 * Temporary list for use in collecting focusable descendents of a view. 21839 */ 21840 final ArrayList<View> mTempArrayList = new ArrayList<View>(24); 21841 21842 /** 21843 * The id of the window for accessibility purposes. 21844 */ 21845 int mAccessibilityWindowId = AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 21846 21847 /** 21848 * Flags related to accessibility processing. 21849 * 21850 * @see AccessibilityNodeInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 21851 * @see AccessibilityNodeInfo#FLAG_REPORT_VIEW_IDS 21852 */ 21853 int mAccessibilityFetchFlags; 21854 21855 /** 21856 * The drawable for highlighting accessibility focus. 21857 */ 21858 Drawable mAccessibilityFocusDrawable; 21859 21860 /** 21861 * Show where the margins, bounds and layout bounds are for each view. 21862 */ 21863 boolean mDebugLayout = SystemProperties.getBoolean(DEBUG_LAYOUT_PROPERTY, false); 21864 21865 /** 21866 * Point used to compute visible regions. 21867 */ 21868 final Point mPoint = new Point(); 21869 21870 /** 21871 * Used to track which View originated a requestLayout() call, used when 21872 * requestLayout() is called during layout. 21873 */ 21874 View mViewRequestingLayout; 21875 21876 /** 21877 * Creates a new set of attachment information with the specified 21878 * events handler and thread. 21879 * 21880 * @param handler the events handler the view must use 21881 */ 21882 AttachInfo(IWindowSession session, IWindow window, Display display, 21883 ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { 21884 mSession = session; 21885 mWindow = window; 21886 mWindowToken = window.asBinder(); 21887 mDisplay = display; 21888 mViewRootImpl = viewRootImpl; 21889 mHandler = handler; 21890 mRootCallbacks = effectPlayer; 21891 } 21892 } 21893 21894 /** 21895 * <p>ScrollabilityCache holds various fields used by a View when scrolling 21896 * is supported. This avoids keeping too many unused fields in most 21897 * instances of View.</p> 21898 */ 21899 private static class ScrollabilityCache implements Runnable { 21900 21901 /** 21902 * Scrollbars are not visible 21903 */ 21904 public static final int OFF = 0; 21905 21906 /** 21907 * Scrollbars are visible 21908 */ 21909 public static final int ON = 1; 21910 21911 /** 21912 * Scrollbars are fading away 21913 */ 21914 public static final int FADING = 2; 21915 21916 public boolean fadeScrollBars; 21917 21918 public int fadingEdgeLength; 21919 public int scrollBarDefaultDelayBeforeFade; 21920 public int scrollBarFadeDuration; 21921 21922 public int scrollBarSize; 21923 public ScrollBarDrawable scrollBar; 21924 public float[] interpolatorValues; 21925 public View host; 21926 21927 public final Paint paint; 21928 public final Matrix matrix; 21929 public Shader shader; 21930 21931 public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); 21932 21933 private static final float[] OPAQUE = { 255 }; 21934 private static final float[] TRANSPARENT = { 0.0f }; 21935 21936 /** 21937 * When fading should start. This time moves into the future every time 21938 * a new scroll happens. Measured based on SystemClock.uptimeMillis() 21939 */ 21940 public long fadeStartTime; 21941 21942 21943 /** 21944 * The current state of the scrollbars: ON, OFF, or FADING 21945 */ 21946 public int state = OFF; 21947 21948 private int mLastColor; 21949 21950 public ScrollabilityCache(ViewConfiguration configuration, View host) { 21951 fadingEdgeLength = configuration.getScaledFadingEdgeLength(); 21952 scrollBarSize = configuration.getScaledScrollBarSize(); 21953 scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); 21954 scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); 21955 21956 paint = new Paint(); 21957 matrix = new Matrix(); 21958 // use use a height of 1, and then wack the matrix each time we 21959 // actually use it. 21960 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 21961 paint.setShader(shader); 21962 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 21963 21964 this.host = host; 21965 } 21966 21967 public void setFadeColor(int color) { 21968 if (color != mLastColor) { 21969 mLastColor = color; 21970 21971 if (color != 0) { 21972 shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, 21973 color & 0x00FFFFFF, Shader.TileMode.CLAMP); 21974 paint.setShader(shader); 21975 // Restore the default transfer mode (src_over) 21976 paint.setXfermode(null); 21977 } else { 21978 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 21979 paint.setShader(shader); 21980 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 21981 } 21982 } 21983 } 21984 21985 public void run() { 21986 long now = AnimationUtils.currentAnimationTimeMillis(); 21987 if (now >= fadeStartTime) { 21988 21989 // the animation fades the scrollbars out by changing 21990 // the opacity (alpha) from fully opaque to fully 21991 // transparent 21992 int nextFrame = (int) now; 21993 int framesCount = 0; 21994 21995 Interpolator interpolator = scrollBarInterpolator; 21996 21997 // Start opaque 21998 interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); 21999 22000 // End transparent 22001 nextFrame += scrollBarFadeDuration; 22002 interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); 22003 22004 state = FADING; 22005 22006 // Kick off the fade animation 22007 host.invalidate(true); 22008 } 22009 } 22010 } 22011 22012 /** 22013 * Resuable callback for sending 22014 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 22015 */ 22016 private class SendViewScrolledAccessibilityEvent implements Runnable { 22017 public volatile boolean mIsPending; 22018 22019 public void run() { 22020 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); 22021 mIsPending = false; 22022 } 22023 } 22024 22025 /** 22026 * <p> 22027 * This class represents a delegate that can be registered in a {@link View} 22028 * to enhance accessibility support via composition rather via inheritance. 22029 * It is specifically targeted to widget developers that extend basic View 22030 * classes i.e. classes in package android.view, that would like their 22031 * applications to be backwards compatible. 22032 * </p> 22033 * <div class="special reference"> 22034 * <h3>Developer Guides</h3> 22035 * <p>For more information about making applications accessible, read the 22036 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 22037 * developer guide.</p> 22038 * </div> 22039 * <p> 22040 * A scenario in which a developer would like to use an accessibility delegate 22041 * is overriding a method introduced in a later API version then the minimal API 22042 * version supported by the application. For example, the method 22043 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available 22044 * in API version 4 when the accessibility APIs were first introduced. If a 22045 * developer would like his application to run on API version 4 devices (assuming 22046 * all other APIs used by the application are version 4 or lower) and take advantage 22047 * of this method, instead of overriding the method which would break the application's 22048 * backwards compatibility, he can override the corresponding method in this 22049 * delegate and register the delegate in the target View if the API version of 22050 * the system is high enough i.e. the API version is same or higher to the API 22051 * version that introduced 22052 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. 22053 * </p> 22054 * <p> 22055 * Here is an example implementation: 22056 * </p> 22057 * <code><pre><p> 22058 * if (Build.VERSION.SDK_INT >= 14) { 22059 * // If the API version is equal of higher than the version in 22060 * // which onInitializeAccessibilityNodeInfo was introduced we 22061 * // register a delegate with a customized implementation. 22062 * View view = findViewById(R.id.view_id); 22063 * view.setAccessibilityDelegate(new AccessibilityDelegate() { 22064 * public void onInitializeAccessibilityNodeInfo(View host, 22065 * AccessibilityNodeInfo info) { 22066 * // Let the default implementation populate the info. 22067 * super.onInitializeAccessibilityNodeInfo(host, info); 22068 * // Set some other information. 22069 * info.setEnabled(host.isEnabled()); 22070 * } 22071 * }); 22072 * } 22073 * </code></pre></p> 22074 * <p> 22075 * This delegate contains methods that correspond to the accessibility methods 22076 * in View. If a delegate has been specified the implementation in View hands 22077 * off handling to the corresponding method in this delegate. The default 22078 * implementation the delegate methods behaves exactly as the corresponding 22079 * method in View for the case of no accessibility delegate been set. Hence, 22080 * to customize the behavior of a View method, clients can override only the 22081 * corresponding delegate method without altering the behavior of the rest 22082 * accessibility related methods of the host view. 22083 * </p> 22084 */ 22085 public static class AccessibilityDelegate { 22086 22087 /** 22088 * Sends an accessibility event of the given type. If accessibility is not 22089 * enabled this method has no effect. 22090 * <p> 22091 * The default implementation behaves as {@link View#sendAccessibilityEvent(int) 22092 * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate 22093 * been set. 22094 * </p> 22095 * 22096 * @param host The View hosting the delegate. 22097 * @param eventType The type of the event to send. 22098 * 22099 * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) 22100 */ 22101 public void sendAccessibilityEvent(View host, int eventType) { 22102 host.sendAccessibilityEventInternal(eventType); 22103 } 22104 22105 /** 22106 * Performs the specified accessibility action on the view. For 22107 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 22108 * <p> 22109 * The default implementation behaves as 22110 * {@link View#performAccessibilityAction(int, Bundle) 22111 * View#performAccessibilityAction(int, Bundle)} for the case of 22112 * no accessibility delegate been set. 22113 * </p> 22114 * 22115 * @param action The action to perform. 22116 * @return Whether the action was performed. 22117 * 22118 * @see View#performAccessibilityAction(int, Bundle) 22119 * View#performAccessibilityAction(int, Bundle) 22120 */ 22121 public boolean performAccessibilityAction(View host, int action, Bundle args) { 22122 return host.performAccessibilityActionInternal(action, args); 22123 } 22124 22125 /** 22126 * Sends an accessibility event. This method behaves exactly as 22127 * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an 22128 * empty {@link AccessibilityEvent} and does not perform a check whether 22129 * accessibility is enabled. 22130 * <p> 22131 * The default implementation behaves as 22132 * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) 22133 * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for 22134 * the case of no accessibility delegate been set. 22135 * </p> 22136 * 22137 * @param host The View hosting the delegate. 22138 * @param event The event to send. 22139 * 22140 * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) 22141 * View#sendAccessibilityEventUnchecked(AccessibilityEvent) 22142 */ 22143 public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { 22144 host.sendAccessibilityEventUncheckedInternal(event); 22145 } 22146 22147 /** 22148 * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then 22149 * to its children for adding their text content to the event. 22150 * <p> 22151 * The default implementation behaves as 22152 * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 22153 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for 22154 * the case of no accessibility delegate been set. 22155 * </p> 22156 * 22157 * @param host The View hosting the delegate. 22158 * @param event The event. 22159 * @return True if the event population was completed. 22160 * 22161 * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 22162 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 22163 */ 22164 public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 22165 return host.dispatchPopulateAccessibilityEventInternal(event); 22166 } 22167 22168 /** 22169 * Gives a chance to the host View to populate the accessibility event with its 22170 * text content. 22171 * <p> 22172 * The default implementation behaves as 22173 * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) 22174 * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for 22175 * the case of no accessibility delegate been set. 22176 * </p> 22177 * 22178 * @param host The View hosting the delegate. 22179 * @param event The accessibility event which to populate. 22180 * 22181 * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) 22182 * View#onPopulateAccessibilityEvent(AccessibilityEvent) 22183 */ 22184 public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 22185 host.onPopulateAccessibilityEventInternal(event); 22186 } 22187 22188 /** 22189 * Initializes an {@link AccessibilityEvent} with information about the 22190 * the host View which is the event source. 22191 * <p> 22192 * The default implementation behaves as 22193 * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) 22194 * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for 22195 * the case of no accessibility delegate been set. 22196 * </p> 22197 * 22198 * @param host The View hosting the delegate. 22199 * @param event The event to initialize. 22200 * 22201 * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) 22202 * View#onInitializeAccessibilityEvent(AccessibilityEvent) 22203 */ 22204 public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 22205 host.onInitializeAccessibilityEventInternal(event); 22206 } 22207 22208 /** 22209 * Initializes an {@link AccessibilityNodeInfo} with information about the host view. 22210 * <p> 22211 * The default implementation behaves as 22212 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 22213 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for 22214 * the case of no accessibility delegate been set. 22215 * </p> 22216 * 22217 * @param host The View hosting the delegate. 22218 * @param info The instance to initialize. 22219 * 22220 * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 22221 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 22222 */ 22223 public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { 22224 host.onInitializeAccessibilityNodeInfoInternal(info); 22225 } 22226 22227 /** 22228 * Called when a child of the host View has requested sending an 22229 * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) 22230 * to augment the event. 22231 * <p> 22232 * The default implementation behaves as 22233 * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 22234 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for 22235 * the case of no accessibility delegate been set. 22236 * </p> 22237 * 22238 * @param host The View hosting the delegate. 22239 * @param child The child which requests sending the event. 22240 * @param event The event to be sent. 22241 * @return True if the event should be sent 22242 * 22243 * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 22244 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 22245 */ 22246 public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, 22247 AccessibilityEvent event) { 22248 return host.onRequestSendAccessibilityEventInternal(child, event); 22249 } 22250 22251 /** 22252 * Gets the provider for managing a virtual view hierarchy rooted at this View 22253 * and reported to {@link android.accessibilityservice.AccessibilityService}s 22254 * that explore the window content. 22255 * <p> 22256 * The default implementation behaves as 22257 * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for 22258 * the case of no accessibility delegate been set. 22259 * </p> 22260 * 22261 * @return The provider. 22262 * 22263 * @see AccessibilityNodeProvider 22264 */ 22265 public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { 22266 return null; 22267 } 22268 22269 /** 22270 * Returns an {@link AccessibilityNodeInfo} representing the host view from the 22271 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 22272 * This method is responsible for obtaining an accessibility node info from a 22273 * pool of reusable instances and calling 22274 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on the host 22275 * view to initialize the former. 22276 * <p> 22277 * <strong>Note:</strong> The client is responsible for recycling the obtained 22278 * instance by calling {@link AccessibilityNodeInfo#recycle()} to minimize object 22279 * creation. 22280 * </p> 22281 * <p> 22282 * The default implementation behaves as 22283 * {@link View#createAccessibilityNodeInfo() View#createAccessibilityNodeInfo()} for 22284 * the case of no accessibility delegate been set. 22285 * </p> 22286 * @return A populated {@link AccessibilityNodeInfo}. 22287 * 22288 * @see AccessibilityNodeInfo 22289 * 22290 * @hide 22291 */ 22292 public AccessibilityNodeInfo createAccessibilityNodeInfo(View host) { 22293 return host.createAccessibilityNodeInfoInternal(); 22294 } 22295 } 22296 22297 private class MatchIdPredicate implements Predicate<View> { 22298 public int mId; 22299 22300 @Override 22301 public boolean apply(View view) { 22302 return (view.mID == mId); 22303 } 22304 } 22305 22306 private class MatchLabelForPredicate implements Predicate<View> { 22307 private int mLabeledId; 22308 22309 @Override 22310 public boolean apply(View view) { 22311 return (view.mLabelForId == mLabeledId); 22312 } 22313 } 22314 22315 private class SendViewStateChangedAccessibilityEvent implements Runnable { 22316 private int mChangeTypes = 0; 22317 private boolean mPosted; 22318 private boolean mPostedWithDelay; 22319 private long mLastEventTimeMillis; 22320 22321 @Override 22322 public void run() { 22323 mPosted = false; 22324 mPostedWithDelay = false; 22325 mLastEventTimeMillis = SystemClock.uptimeMillis(); 22326 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 22327 final AccessibilityEvent event = AccessibilityEvent.obtain(); 22328 event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); 22329 event.setContentChangeTypes(mChangeTypes); 22330 sendAccessibilityEventUnchecked(event); 22331 } 22332 mChangeTypes = 0; 22333 } 22334 22335 public void runOrPost(int changeType) { 22336 mChangeTypes |= changeType; 22337 22338 // If this is a live region or the child of a live region, collect 22339 // all events from this frame and send them on the next frame. 22340 if (inLiveRegion()) { 22341 // If we're already posted with a delay, remove that. 22342 if (mPostedWithDelay) { 22343 removeCallbacks(this); 22344 mPostedWithDelay = false; 22345 } 22346 // Only post if we're not already posted. 22347 if (!mPosted) { 22348 post(this); 22349 mPosted = true; 22350 } 22351 return; 22352 } 22353 22354 if (mPosted) { 22355 return; 22356 } 22357 22358 final long timeSinceLastMillis = SystemClock.uptimeMillis() - mLastEventTimeMillis; 22359 final long minEventIntevalMillis = 22360 ViewConfiguration.getSendRecurringAccessibilityEventsInterval(); 22361 if (timeSinceLastMillis >= minEventIntevalMillis) { 22362 removeCallbacks(this); 22363 run(); 22364 } else { 22365 postDelayed(this, minEventIntevalMillis - timeSinceLastMillis); 22366 mPostedWithDelay = true; 22367 } 22368 } 22369 } 22370 22371 private boolean inLiveRegion() { 22372 if (getAccessibilityLiveRegion() != View.ACCESSIBILITY_LIVE_REGION_NONE) { 22373 return true; 22374 } 22375 22376 ViewParent parent = getParent(); 22377 while (parent instanceof View) { 22378 if (((View) parent).getAccessibilityLiveRegion() 22379 != View.ACCESSIBILITY_LIVE_REGION_NONE) { 22380 return true; 22381 } 22382 parent = parent.getParent(); 22383 } 22384 22385 return false; 22386 } 22387 22388 /** 22389 * Dump all private flags in readable format, useful for documentation and 22390 * sanity checking. 22391 */ 22392 private static void dumpFlags() { 22393 final HashMap<String, String> found = Maps.newHashMap(); 22394 try { 22395 for (Field field : View.class.getDeclaredFields()) { 22396 final int modifiers = field.getModifiers(); 22397 if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) { 22398 if (field.getType().equals(int.class)) { 22399 final int value = field.getInt(null); 22400 dumpFlag(found, field.getName(), value); 22401 } else if (field.getType().equals(int[].class)) { 22402 final int[] values = (int[]) field.get(null); 22403 for (int i = 0; i < values.length; i++) { 22404 dumpFlag(found, field.getName() + "[" + i + "]", values[i]); 22405 } 22406 } 22407 } 22408 } 22409 } catch (IllegalAccessException e) { 22410 throw new RuntimeException(e); 22411 } 22412 22413 final ArrayList<String> keys = Lists.newArrayList(); 22414 keys.addAll(found.keySet()); 22415 Collections.sort(keys); 22416 for (String key : keys) { 22417 Log.d(VIEW_LOG_TAG, found.get(key)); 22418 } 22419 } 22420 22421 private static void dumpFlag(HashMap<String, String> found, String name, int value) { 22422 // Sort flags by prefix, then by bits, always keeping unique keys 22423 final String bits = String.format("%32s", Integer.toBinaryString(value)).replace('0', ' '); 22424 final int prefix = name.indexOf('_'); 22425 final String key = (prefix > 0 ? name.substring(0, prefix) : name) + bits + name; 22426 final String output = bits + " " + name; 22427 found.put(key, output); 22428 } 22429 22430 /** {@hide} */ 22431 public void encode(@NonNull ViewHierarchyEncoder stream) { 22432 stream.beginObject(this); 22433 encodeProperties(stream); 22434 stream.endObject(); 22435 } 22436 22437 /** {@hide} */ 22438 @CallSuper 22439 protected void encodeProperties(@NonNull ViewHierarchyEncoder stream) { 22440 Object resolveId = ViewDebug.resolveId(getContext(), mID); 22441 if (resolveId instanceof String) { 22442 stream.addProperty("id", (String) resolveId); 22443 } else { 22444 stream.addProperty("id", mID); 22445 } 22446 22447 stream.addProperty("misc:transformation.alpha", 22448 mTransformationInfo != null ? mTransformationInfo.mAlpha : 0); 22449 stream.addProperty("misc:transitionName", getTransitionName()); 22450 22451 // layout 22452 stream.addProperty("layout:left", mLeft); 22453 stream.addProperty("layout:right", mRight); 22454 stream.addProperty("layout:top", mTop); 22455 stream.addProperty("layout:bottom", mBottom); 22456 stream.addProperty("layout:width", getWidth()); 22457 stream.addProperty("layout:height", getHeight()); 22458 stream.addProperty("layout:layoutDirection", getLayoutDirection()); 22459 stream.addProperty("layout:layoutRtl", isLayoutRtl()); 22460 stream.addProperty("layout:hasTransientState", hasTransientState()); 22461 stream.addProperty("layout:baseline", getBaseline()); 22462 22463 // layout params 22464 ViewGroup.LayoutParams layoutParams = getLayoutParams(); 22465 if (layoutParams != null) { 22466 stream.addPropertyKey("layoutParams"); 22467 layoutParams.encode(stream); 22468 } 22469 22470 // scrolling 22471 stream.addProperty("scrolling:scrollX", mScrollX); 22472 stream.addProperty("scrolling:scrollY", mScrollY); 22473 22474 // padding 22475 stream.addProperty("padding:paddingLeft", mPaddingLeft); 22476 stream.addProperty("padding:paddingRight", mPaddingRight); 22477 stream.addProperty("padding:paddingTop", mPaddingTop); 22478 stream.addProperty("padding:paddingBottom", mPaddingBottom); 22479 stream.addProperty("padding:userPaddingRight", mUserPaddingRight); 22480 stream.addProperty("padding:userPaddingLeft", mUserPaddingLeft); 22481 stream.addProperty("padding:userPaddingBottom", mUserPaddingBottom); 22482 stream.addProperty("padding:userPaddingStart", mUserPaddingStart); 22483 stream.addProperty("padding:userPaddingEnd", mUserPaddingEnd); 22484 22485 // measurement 22486 stream.addProperty("measurement:minHeight", mMinHeight); 22487 stream.addProperty("measurement:minWidth", mMinWidth); 22488 stream.addProperty("measurement:measuredWidth", mMeasuredWidth); 22489 stream.addProperty("measurement:measuredHeight", mMeasuredHeight); 22490 22491 // drawing 22492 stream.addProperty("drawing:elevation", getElevation()); 22493 stream.addProperty("drawing:translationX", getTranslationX()); 22494 stream.addProperty("drawing:translationY", getTranslationY()); 22495 stream.addProperty("drawing:translationZ", getTranslationZ()); 22496 stream.addProperty("drawing:rotation", getRotation()); 22497 stream.addProperty("drawing:rotationX", getRotationX()); 22498 stream.addProperty("drawing:rotationY", getRotationY()); 22499 stream.addProperty("drawing:scaleX", getScaleX()); 22500 stream.addProperty("drawing:scaleY", getScaleY()); 22501 stream.addProperty("drawing:pivotX", getPivotX()); 22502 stream.addProperty("drawing:pivotY", getPivotY()); 22503 stream.addProperty("drawing:opaque", isOpaque()); 22504 stream.addProperty("drawing:alpha", getAlpha()); 22505 stream.addProperty("drawing:transitionAlpha", getTransitionAlpha()); 22506 stream.addProperty("drawing:shadow", hasShadow()); 22507 stream.addProperty("drawing:solidColor", getSolidColor()); 22508 stream.addProperty("drawing:layerType", mLayerType); 22509 stream.addProperty("drawing:willNotDraw", willNotDraw()); 22510 stream.addProperty("drawing:hardwareAccelerated", isHardwareAccelerated()); 22511 stream.addProperty("drawing:willNotCacheDrawing", willNotCacheDrawing()); 22512 stream.addProperty("drawing:drawingCacheEnabled", isDrawingCacheEnabled()); 22513 stream.addProperty("drawing:overlappingRendering", hasOverlappingRendering()); 22514 22515 // focus 22516 stream.addProperty("focus:hasFocus", hasFocus()); 22517 stream.addProperty("focus:isFocused", isFocused()); 22518 stream.addProperty("focus:isFocusable", isFocusable()); 22519 stream.addProperty("focus:isFocusableInTouchMode", isFocusableInTouchMode()); 22520 22521 stream.addProperty("misc:clickable", isClickable()); 22522 stream.addProperty("misc:pressed", isPressed()); 22523 stream.addProperty("misc:selected", isSelected()); 22524 stream.addProperty("misc:touchMode", isInTouchMode()); 22525 stream.addProperty("misc:hovered", isHovered()); 22526 stream.addProperty("misc:activated", isActivated()); 22527 22528 stream.addProperty("misc:visibility", getVisibility()); 22529 stream.addProperty("misc:fitsSystemWindows", getFitsSystemWindows()); 22530 stream.addProperty("misc:filterTouchesWhenObscured", getFilterTouchesWhenObscured()); 22531 22532 stream.addProperty("misc:enabled", isEnabled()); 22533 stream.addProperty("misc:soundEffectsEnabled", isSoundEffectsEnabled()); 22534 stream.addProperty("misc:hapticFeedbackEnabled", isHapticFeedbackEnabled()); 22535 22536 // theme attributes 22537 Resources.Theme theme = getContext().getTheme(); 22538 if (theme != null) { 22539 stream.addPropertyKey("theme"); 22540 theme.encode(stream); 22541 } 22542 22543 // view attribute information 22544 int n = mAttributes != null ? mAttributes.length : 0; 22545 stream.addProperty("meta:__attrCount__", n/2); 22546 for (int i = 0; i < n; i += 2) { 22547 stream.addProperty("meta:__attr__" + mAttributes[i], mAttributes[i+1]); 22548 } 22549 22550 stream.addProperty("misc:scrollBarStyle", getScrollBarStyle()); 22551 22552 // text 22553 stream.addProperty("text:textDirection", getTextDirection()); 22554 stream.addProperty("text:textAlignment", getTextAlignment()); 22555 22556 // accessibility 22557 CharSequence contentDescription = getContentDescription(); 22558 stream.addProperty("accessibility:contentDescription", 22559 contentDescription == null ? "" : contentDescription.toString()); 22560 stream.addProperty("accessibility:labelFor", getLabelFor()); 22561 stream.addProperty("accessibility:importantForAccessibility", getImportantForAccessibility()); 22562 } 22563} 22564