View.java revision f86cb678a5afd94505c42497817e7f63427683b9
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.IntDef; 22import android.annotation.NonNull; 23import android.annotation.Nullable; 24import android.content.ClipData; 25import android.content.Context; 26import android.content.res.ColorStateList; 27import android.content.res.Configuration; 28import android.content.res.Resources; 29import android.content.res.TypedArray; 30import android.graphics.Bitmap; 31import android.graphics.Canvas; 32import android.graphics.Insets; 33import android.graphics.Interpolator; 34import android.graphics.LinearGradient; 35import android.graphics.Matrix; 36import android.graphics.Outline; 37import android.graphics.Paint; 38import android.graphics.PixelFormat; 39import android.graphics.Point; 40import android.graphics.PorterDuff; 41import android.graphics.PorterDuffXfermode; 42import android.graphics.Rect; 43import android.graphics.RectF; 44import android.graphics.Region; 45import android.graphics.Shader; 46import android.graphics.drawable.ColorDrawable; 47import android.graphics.drawable.Drawable; 48import android.hardware.display.DisplayManagerGlobal; 49import android.os.Bundle; 50import android.os.Handler; 51import android.os.IBinder; 52import android.os.Parcel; 53import android.os.Parcelable; 54import android.os.RemoteException; 55import android.os.SystemClock; 56import android.os.SystemProperties; 57import android.text.TextUtils; 58import android.util.AttributeSet; 59import android.util.FloatProperty; 60import android.util.LayoutDirection; 61import android.util.Log; 62import android.util.LongSparseLongArray; 63import android.util.Pools.SynchronizedPool; 64import android.util.Property; 65import android.util.SparseArray; 66import android.util.SuperNotCalledException; 67import android.util.TypedValue; 68import android.view.ContextMenu.ContextMenuInfo; 69import android.view.AccessibilityIterators.TextSegmentIterator; 70import android.view.AccessibilityIterators.CharacterTextSegmentIterator; 71import android.view.AccessibilityIterators.WordTextSegmentIterator; 72import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; 73import android.view.accessibility.AccessibilityEvent; 74import android.view.accessibility.AccessibilityEventSource; 75import android.view.accessibility.AccessibilityManager; 76import android.view.accessibility.AccessibilityNodeInfo; 77import android.view.accessibility.AccessibilityNodeProvider; 78import android.view.animation.Animation; 79import android.view.animation.AnimationUtils; 80import android.view.animation.Transformation; 81import android.view.inputmethod.EditorInfo; 82import android.view.inputmethod.InputConnection; 83import android.view.inputmethod.InputMethodManager; 84import android.widget.ScrollBarDrawable; 85 86import static android.os.Build.VERSION_CODES.*; 87import static java.lang.Math.max; 88 89import com.android.internal.R; 90import com.android.internal.util.Predicate; 91import com.android.internal.view.menu.MenuBuilder; 92import com.google.android.collect.Lists; 93import com.google.android.collect.Maps; 94 95import java.lang.annotation.Retention; 96import java.lang.annotation.RetentionPolicy; 97import java.lang.ref.WeakReference; 98import java.lang.reflect.Field; 99import java.lang.reflect.InvocationTargetException; 100import java.lang.reflect.Method; 101import java.lang.reflect.Modifier; 102import java.util.ArrayList; 103import java.util.Arrays; 104import java.util.Collections; 105import java.util.HashMap; 106import java.util.List; 107import java.util.Locale; 108import java.util.Map; 109import java.util.concurrent.CopyOnWriteArrayList; 110import java.util.concurrent.atomic.AtomicInteger; 111 112/** 113 * <p> 114 * This class represents the basic building block for user interface components. A View 115 * occupies a rectangular area on the screen and is responsible for drawing and 116 * event handling. View is the base class for <em>widgets</em>, which are 117 * used to create interactive UI components (buttons, text fields, etc.). The 118 * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which 119 * are invisible containers that hold other Views (or other ViewGroups) and define 120 * their layout properties. 121 * </p> 122 * 123 * <div class="special reference"> 124 * <h3>Developer Guides</h3> 125 * <p>For information about using this class to develop your application's user interface, 126 * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. 127 * </div> 128 * 129 * <a name="Using"></a> 130 * <h3>Using Views</h3> 131 * <p> 132 * All of the views in a window are arranged in a single tree. You can add views 133 * either from code or by specifying a tree of views in one or more XML layout 134 * files. There are many specialized subclasses of views that act as controls or 135 * are capable of displaying text, images, or other content. 136 * </p> 137 * <p> 138 * Once you have created a tree of views, there are typically a few types of 139 * common operations you may wish to perform: 140 * <ul> 141 * <li><strong>Set properties:</strong> for example setting the text of a 142 * {@link android.widget.TextView}. The available properties and the methods 143 * that set them will vary among the different subclasses of views. Note that 144 * properties that are known at build time can be set in the XML layout 145 * files.</li> 146 * <li><strong>Set focus:</strong> The framework will handled moving focus in 147 * response to user input. To force focus to a specific view, call 148 * {@link #requestFocus}.</li> 149 * <li><strong>Set up listeners:</strong> Views allow clients to set listeners 150 * that will be notified when something interesting happens to the view. For 151 * example, all views will let you set a listener to be notified when the view 152 * gains or loses focus. You can register such a listener using 153 * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. 154 * Other view subclasses offer more specialized listeners. For example, a Button 155 * exposes a listener to notify clients when the button is clicked.</li> 156 * <li><strong>Set visibility:</strong> You can hide or show views using 157 * {@link #setVisibility(int)}.</li> 158 * </ul> 159 * </p> 160 * <p><em> 161 * Note: The Android framework is responsible for measuring, laying out and 162 * drawing views. You should not call methods that perform these actions on 163 * views yourself unless you are actually implementing a 164 * {@link android.view.ViewGroup}. 165 * </em></p> 166 * 167 * <a name="Lifecycle"></a> 168 * <h3>Implementing a Custom View</h3> 169 * 170 * <p> 171 * To implement a custom view, you will usually begin by providing overrides for 172 * some of the standard methods that the framework calls on all views. You do 173 * not need to override all of these methods. In fact, you can start by just 174 * overriding {@link #onDraw(android.graphics.Canvas)}. 175 * <table border="2" width="85%" align="center" cellpadding="5"> 176 * <thead> 177 * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> 178 * </thead> 179 * 180 * <tbody> 181 * <tr> 182 * <td rowspan="2">Creation</td> 183 * <td>Constructors</td> 184 * <td>There is a form of the constructor that are called when the view 185 * is created from code and a form that is called when the view is 186 * inflated from a layout file. The second form should parse and apply 187 * any attributes defined in the layout file. 188 * </td> 189 * </tr> 190 * <tr> 191 * <td><code>{@link #onFinishInflate()}</code></td> 192 * <td>Called after a view and all of its children has been inflated 193 * from XML.</td> 194 * </tr> 195 * 196 * <tr> 197 * <td rowspan="3">Layout</td> 198 * <td><code>{@link #onMeasure(int, int)}</code></td> 199 * <td>Called to determine the size requirements for this view and all 200 * of its children. 201 * </td> 202 * </tr> 203 * <tr> 204 * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> 205 * <td>Called when this view should assign a size and position to all 206 * of its children. 207 * </td> 208 * </tr> 209 * <tr> 210 * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> 211 * <td>Called when the size of this view has changed. 212 * </td> 213 * </tr> 214 * 215 * <tr> 216 * <td>Drawing</td> 217 * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> 218 * <td>Called when the view should render its content. 219 * </td> 220 * </tr> 221 * 222 * <tr> 223 * <td rowspan="4">Event processing</td> 224 * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> 225 * <td>Called when a new hardware key event occurs. 226 * </td> 227 * </tr> 228 * <tr> 229 * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> 230 * <td>Called when a hardware key up event occurs. 231 * </td> 232 * </tr> 233 * <tr> 234 * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> 235 * <td>Called when a trackball motion event occurs. 236 * </td> 237 * </tr> 238 * <tr> 239 * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> 240 * <td>Called when a touch screen motion event occurs. 241 * </td> 242 * </tr> 243 * 244 * <tr> 245 * <td rowspan="2">Focus</td> 246 * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> 247 * <td>Called when the view gains or loses focus. 248 * </td> 249 * </tr> 250 * 251 * <tr> 252 * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> 253 * <td>Called when the window containing the view gains or loses focus. 254 * </td> 255 * </tr> 256 * 257 * <tr> 258 * <td rowspan="3">Attaching</td> 259 * <td><code>{@link #onAttachedToWindow()}</code></td> 260 * <td>Called when the view is attached to a window. 261 * </td> 262 * </tr> 263 * 264 * <tr> 265 * <td><code>{@link #onDetachedFromWindow}</code></td> 266 * <td>Called when the view is detached from its window. 267 * </td> 268 * </tr> 269 * 270 * <tr> 271 * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> 272 * <td>Called when the visibility of the window containing the view 273 * has changed. 274 * </td> 275 * </tr> 276 * </tbody> 277 * 278 * </table> 279 * </p> 280 * 281 * <a name="IDs"></a> 282 * <h3>IDs</h3> 283 * Views may have an integer id associated with them. These ids are typically 284 * assigned in the layout XML files, and are used to find specific views within 285 * the view tree. A common pattern is to: 286 * <ul> 287 * <li>Define a Button in the layout file and assign it a unique ID. 288 * <pre> 289 * <Button 290 * android:id="@+id/my_button" 291 * android:layout_width="wrap_content" 292 * android:layout_height="wrap_content" 293 * android:text="@string/my_button_text"/> 294 * </pre></li> 295 * <li>From the onCreate method of an Activity, find the Button 296 * <pre class="prettyprint"> 297 * Button myButton = (Button) findViewById(R.id.my_button); 298 * </pre></li> 299 * </ul> 300 * <p> 301 * View IDs need not be unique throughout the tree, but it is good practice to 302 * ensure that they are at least unique within the part of the tree you are 303 * searching. 304 * </p> 305 * 306 * <a name="Position"></a> 307 * <h3>Position</h3> 308 * <p> 309 * The geometry of a view is that of a rectangle. A view has a location, 310 * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and 311 * two dimensions, expressed as a width and a height. The unit for location 312 * and dimensions is the pixel. 313 * </p> 314 * 315 * <p> 316 * It is possible to retrieve the location of a view by invoking the methods 317 * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, 318 * coordinate of the rectangle representing the view. The latter returns the 319 * top, or Y, coordinate of the rectangle representing the view. These methods 320 * both return the location of the view relative to its parent. For instance, 321 * when getLeft() returns 20, that means the view is located 20 pixels to the 322 * right of the left edge of its direct parent. 323 * </p> 324 * 325 * <p> 326 * In addition, several convenience methods are offered to avoid unnecessary 327 * computations, namely {@link #getRight()} and {@link #getBottom()}. 328 * These methods return the coordinates of the right and bottom edges of the 329 * rectangle representing the view. For instance, calling {@link #getRight()} 330 * is similar to the following computation: <code>getLeft() + getWidth()</code> 331 * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) 332 * </p> 333 * 334 * <a name="SizePaddingMargins"></a> 335 * <h3>Size, padding and margins</h3> 336 * <p> 337 * The size of a view is expressed with a width and a height. A view actually 338 * possess two pairs of width and height values. 339 * </p> 340 * 341 * <p> 342 * The first pair is known as <em>measured width</em> and 343 * <em>measured height</em>. These dimensions define how big a view wants to be 344 * within its parent (see <a href="#Layout">Layout</a> for more details.) The 345 * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} 346 * and {@link #getMeasuredHeight()}. 347 * </p> 348 * 349 * <p> 350 * The second pair is simply known as <em>width</em> and <em>height</em>, or 351 * sometimes <em>drawing width</em> and <em>drawing height</em>. These 352 * dimensions define the actual size of the view on screen, at drawing time and 353 * after layout. These values may, but do not have to, be different from the 354 * measured width and height. The width and height can be obtained by calling 355 * {@link #getWidth()} and {@link #getHeight()}. 356 * </p> 357 * 358 * <p> 359 * To measure its dimensions, a view takes into account its padding. The padding 360 * is expressed in pixels for the left, top, right and bottom parts of the view. 361 * Padding can be used to offset the content of the view by a specific amount of 362 * pixels. For instance, a left padding of 2 will push the view's content by 363 * 2 pixels to the right of the left edge. Padding can be set using the 364 * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} 365 * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, 366 * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, 367 * {@link #getPaddingEnd()}. 368 * </p> 369 * 370 * <p> 371 * Even though a view can define a padding, it does not provide any support for 372 * margins. However, view groups provide such a support. Refer to 373 * {@link android.view.ViewGroup} and 374 * {@link android.view.ViewGroup.MarginLayoutParams} for further information. 375 * </p> 376 * 377 * <a name="Layout"></a> 378 * <h3>Layout</h3> 379 * <p> 380 * Layout is a two pass process: a measure pass and a layout pass. The measuring 381 * pass is implemented in {@link #measure(int, int)} and is a top-down traversal 382 * of the view tree. Each view pushes dimension specifications down the tree 383 * during the recursion. At the end of the measure pass, every view has stored 384 * its measurements. The second pass happens in 385 * {@link #layout(int,int,int,int)} and is also top-down. During 386 * this pass each parent is responsible for positioning all of its children 387 * using the sizes computed in the measure pass. 388 * </p> 389 * 390 * <p> 391 * When a view's measure() method returns, its {@link #getMeasuredWidth()} and 392 * {@link #getMeasuredHeight()} values must be set, along with those for all of 393 * that view's descendants. A view's measured width and measured height values 394 * must respect the constraints imposed by the view's parents. This guarantees 395 * that at the end of the measure pass, all parents accept all of their 396 * children's measurements. A parent view may call measure() more than once on 397 * its children. For example, the parent may measure each child once with 398 * unspecified dimensions to find out how big they want to be, then call 399 * measure() on them again with actual numbers if the sum of all the children's 400 * unconstrained sizes is too big or too small. 401 * </p> 402 * 403 * <p> 404 * The measure pass uses two classes to communicate dimensions. The 405 * {@link MeasureSpec} class is used by views to tell their parents how they 406 * want to be measured and positioned. The base LayoutParams class just 407 * describes how big the view wants to be for both width and height. For each 408 * dimension, it can specify one of: 409 * <ul> 410 * <li> an exact number 411 * <li>MATCH_PARENT, which means the view wants to be as big as its parent 412 * (minus padding) 413 * <li> WRAP_CONTENT, which means that the view wants to be just big enough to 414 * enclose its content (plus padding). 415 * </ul> 416 * There are subclasses of LayoutParams for different subclasses of ViewGroup. 417 * For example, AbsoluteLayout has its own subclass of LayoutParams which adds 418 * an X and Y value. 419 * </p> 420 * 421 * <p> 422 * MeasureSpecs are used to push requirements down the tree from parent to 423 * child. A MeasureSpec can be in one of three modes: 424 * <ul> 425 * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension 426 * of a child view. For example, a LinearLayout may call measure() on its child 427 * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how 428 * tall the child view wants to be given a width of 240 pixels. 429 * <li>EXACTLY: This is used by the parent to impose an exact size on the 430 * child. The child must use this size, and guarantee that all of its 431 * descendants will fit within this size. 432 * <li>AT_MOST: This is used by the parent to impose a maximum size on the 433 * child. The child must guarantee that it and all of its descendants will fit 434 * within this size. 435 * </ul> 436 * </p> 437 * 438 * <p> 439 * To intiate a layout, call {@link #requestLayout}. This method is typically 440 * called by a view on itself when it believes that is can no longer fit within 441 * its current bounds. 442 * </p> 443 * 444 * <a name="Drawing"></a> 445 * <h3>Drawing</h3> 446 * <p> 447 * Drawing is handled by walking the tree and rendering each view that 448 * intersects the invalid region. Because the tree is traversed in-order, 449 * this means that parents will draw before (i.e., behind) their children, with 450 * siblings drawn in the order they appear in the tree. 451 * If you set a background drawable for a View, then the View will draw it for you 452 * before calling back to its <code>onDraw()</code> method. 453 * </p> 454 * 455 * <p> 456 * Note that the framework will not draw views that are not in the invalid region. 457 * </p> 458 * 459 * <p> 460 * To force a view to draw, call {@link #invalidate()}. 461 * </p> 462 * 463 * <a name="EventHandlingThreading"></a> 464 * <h3>Event Handling and Threading</h3> 465 * <p> 466 * The basic cycle of a view is as follows: 467 * <ol> 468 * <li>An event comes in and is dispatched to the appropriate view. The view 469 * handles the event and notifies any listeners.</li> 470 * <li>If in the course of processing the event, the view's bounds may need 471 * to be changed, the view will call {@link #requestLayout()}.</li> 472 * <li>Similarly, if in the course of processing the event the view's appearance 473 * may need to be changed, the view will call {@link #invalidate()}.</li> 474 * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, 475 * the framework will take care of measuring, laying out, and drawing the tree 476 * as appropriate.</li> 477 * </ol> 478 * </p> 479 * 480 * <p><em>Note: The entire view tree is single threaded. You must always be on 481 * the UI thread when calling any method on any view.</em> 482 * If you are doing work on other threads and want to update the state of a view 483 * from that thread, you should use a {@link Handler}. 484 * </p> 485 * 486 * <a name="FocusHandling"></a> 487 * <h3>Focus Handling</h3> 488 * <p> 489 * The framework will handle routine focus movement in response to user input. 490 * This includes changing the focus as views are removed or hidden, or as new 491 * views become available. Views indicate their willingness to take focus 492 * through the {@link #isFocusable} method. To change whether a view can take 493 * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) 494 * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} 495 * and can change this via {@link #setFocusableInTouchMode(boolean)}. 496 * </p> 497 * <p> 498 * Focus movement is based on an algorithm which finds the nearest neighbor in a 499 * given direction. In rare cases, the default algorithm may not match the 500 * intended behavior of the developer. In these situations, you can provide 501 * explicit overrides by using these XML attributes in the layout file: 502 * <pre> 503 * nextFocusDown 504 * nextFocusLeft 505 * nextFocusRight 506 * nextFocusUp 507 * </pre> 508 * </p> 509 * 510 * 511 * <p> 512 * To get a particular view to take focus, call {@link #requestFocus()}. 513 * </p> 514 * 515 * <a name="TouchMode"></a> 516 * <h3>Touch Mode</h3> 517 * <p> 518 * When a user is navigating a user interface via directional keys such as a D-pad, it is 519 * necessary to give focus to actionable items such as buttons so the user can see 520 * what will take input. If the device has touch capabilities, however, and the user 521 * begins interacting with the interface by touching it, it is no longer necessary to 522 * always highlight, or give focus to, a particular view. This motivates a mode 523 * for interaction named 'touch mode'. 524 * </p> 525 * <p> 526 * For a touch capable device, once the user touches the screen, the device 527 * will enter touch mode. From this point onward, only views for which 528 * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. 529 * Other views that are touchable, like buttons, will not take focus when touched; they will 530 * only fire the on click listeners. 531 * </p> 532 * <p> 533 * Any time a user hits a directional key, such as a D-pad direction, the view device will 534 * exit touch mode, and find a view to take focus, so that the user may resume interacting 535 * with the user interface without touching the screen again. 536 * </p> 537 * <p> 538 * The touch mode state is maintained across {@link android.app.Activity}s. Call 539 * {@link #isInTouchMode} to see whether the device is currently in touch mode. 540 * </p> 541 * 542 * <a name="Scrolling"></a> 543 * <h3>Scrolling</h3> 544 * <p> 545 * The framework provides basic support for views that wish to internally 546 * scroll their content. This includes keeping track of the X and Y scroll 547 * offset as well as mechanisms for drawing scrollbars. See 548 * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and 549 * {@link #awakenScrollBars()} for more details. 550 * </p> 551 * 552 * <a name="Tags"></a> 553 * <h3>Tags</h3> 554 * <p> 555 * Unlike IDs, tags are not used to identify views. Tags are essentially an 556 * extra piece of information that can be associated with a view. They are most 557 * often used as a convenience to store data related to views in the views 558 * themselves rather than by putting them in a separate structure. 559 * </p> 560 * 561 * <a name="Properties"></a> 562 * <h3>Properties</h3> 563 * <p> 564 * The View class exposes an {@link #ALPHA} property, as well as several transform-related 565 * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are 566 * available both in the {@link Property} form as well as in similarly-named setter/getter 567 * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can 568 * be used to set persistent state associated with these rendering-related properties on the view. 569 * The properties and methods can also be used in conjunction with 570 * {@link android.animation.Animator Animator}-based animations, described more in the 571 * <a href="#Animation">Animation</a> section. 572 * </p> 573 * 574 * <a name="Animation"></a> 575 * <h3>Animation</h3> 576 * <p> 577 * Starting with Android 3.0, the preferred way of animating views is to use the 578 * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based 579 * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and 580 * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 581 * {@link android.view.animation.Animation Animation}-based classes, which instead animate only 582 * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class 583 * makes animating these View properties particularly easy and efficient. 584 * </p> 585 * <p> 586 * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. 587 * You can attach an {@link Animation} object to a view using 588 * {@link #setAnimation(Animation)} or 589 * {@link #startAnimation(Animation)}. The animation can alter the scale, 590 * rotation, translation and alpha of a view over time. If the animation is 591 * attached to a view that has children, the animation will affect the entire 592 * subtree rooted by that node. When an animation is started, the framework will 593 * take care of redrawing the appropriate views until the animation completes. 594 * </p> 595 * 596 * <a name="Security"></a> 597 * <h3>Security</h3> 598 * <p> 599 * Sometimes it is essential that an application be able to verify that an action 600 * is being performed with the full knowledge and consent of the user, such as 601 * granting a permission request, making a purchase or clicking on an advertisement. 602 * Unfortunately, a malicious application could try to spoof the user into 603 * performing these actions, unaware, by concealing the intended purpose of the view. 604 * As a remedy, the framework offers a touch filtering mechanism that can be used to 605 * improve the security of views that provide access to sensitive functionality. 606 * </p><p> 607 * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the 608 * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework 609 * will discard touches that are received whenever the view's window is obscured by 610 * another visible window. As a result, the view will not receive touches whenever a 611 * toast, dialog or other window appears above the view's window. 612 * </p><p> 613 * For more fine-grained control over security, consider overriding the 614 * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own 615 * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. 616 * </p> 617 * 618 * @attr ref android.R.styleable#View_alpha 619 * @attr ref android.R.styleable#View_background 620 * @attr ref android.R.styleable#View_clickable 621 * @attr ref android.R.styleable#View_contentDescription 622 * @attr ref android.R.styleable#View_drawingCacheQuality 623 * @attr ref android.R.styleable#View_duplicateParentState 624 * @attr ref android.R.styleable#View_id 625 * @attr ref android.R.styleable#View_requiresFadingEdge 626 * @attr ref android.R.styleable#View_fadeScrollbars 627 * @attr ref android.R.styleable#View_fadingEdgeLength 628 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 629 * @attr ref android.R.styleable#View_fitsSystemWindows 630 * @attr ref android.R.styleable#View_isScrollContainer 631 * @attr ref android.R.styleable#View_focusable 632 * @attr ref android.R.styleable#View_focusableInTouchMode 633 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 634 * @attr ref android.R.styleable#View_keepScreenOn 635 * @attr ref android.R.styleable#View_layerType 636 * @attr ref android.R.styleable#View_layoutDirection 637 * @attr ref android.R.styleable#View_longClickable 638 * @attr ref android.R.styleable#View_minHeight 639 * @attr ref android.R.styleable#View_minWidth 640 * @attr ref android.R.styleable#View_nextFocusDown 641 * @attr ref android.R.styleable#View_nextFocusLeft 642 * @attr ref android.R.styleable#View_nextFocusRight 643 * @attr ref android.R.styleable#View_nextFocusUp 644 * @attr ref android.R.styleable#View_onClick 645 * @attr ref android.R.styleable#View_padding 646 * @attr ref android.R.styleable#View_paddingBottom 647 * @attr ref android.R.styleable#View_paddingLeft 648 * @attr ref android.R.styleable#View_paddingRight 649 * @attr ref android.R.styleable#View_paddingTop 650 * @attr ref android.R.styleable#View_paddingStart 651 * @attr ref android.R.styleable#View_paddingEnd 652 * @attr ref android.R.styleable#View_saveEnabled 653 * @attr ref android.R.styleable#View_rotation 654 * @attr ref android.R.styleable#View_rotationX 655 * @attr ref android.R.styleable#View_rotationY 656 * @attr ref android.R.styleable#View_scaleX 657 * @attr ref android.R.styleable#View_scaleY 658 * @attr ref android.R.styleable#View_scrollX 659 * @attr ref android.R.styleable#View_scrollY 660 * @attr ref android.R.styleable#View_scrollbarSize 661 * @attr ref android.R.styleable#View_scrollbarStyle 662 * @attr ref android.R.styleable#View_scrollbars 663 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 664 * @attr ref android.R.styleable#View_scrollbarFadeDuration 665 * @attr ref android.R.styleable#View_scrollbarTrackHorizontal 666 * @attr ref android.R.styleable#View_scrollbarThumbHorizontal 667 * @attr ref android.R.styleable#View_scrollbarThumbVertical 668 * @attr ref android.R.styleable#View_scrollbarTrackVertical 669 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack 670 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack 671 * @attr ref android.R.styleable#View_stateListAnimator 672 * @attr ref android.R.styleable#View_transitionName 673 * @attr ref android.R.styleable#View_soundEffectsEnabled 674 * @attr ref android.R.styleable#View_tag 675 * @attr ref android.R.styleable#View_textAlignment 676 * @attr ref android.R.styleable#View_textDirection 677 * @attr ref android.R.styleable#View_transformPivotX 678 * @attr ref android.R.styleable#View_transformPivotY 679 * @attr ref android.R.styleable#View_translationX 680 * @attr ref android.R.styleable#View_translationY 681 * @attr ref android.R.styleable#View_translationZ 682 * @attr ref android.R.styleable#View_visibility 683 * 684 * @see android.view.ViewGroup 685 */ 686public class View implements Drawable.Callback, KeyEvent.Callback, 687 AccessibilityEventSource { 688 private static final boolean DBG = false; 689 690 /** 691 * The logging tag used by this class with android.util.Log. 692 */ 693 protected static final String VIEW_LOG_TAG = "View"; 694 695 /** 696 * When set to true, apps will draw debugging information about their layouts. 697 * 698 * @hide 699 */ 700 public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; 701 702 /** 703 * When set to true, this view will save its attribute data. 704 * 705 * @hide 706 */ 707 public static boolean mDebugViewAttributes = false; 708 709 /** 710 * Used to mark a View that has no ID. 711 */ 712 public static final int NO_ID = -1; 713 714 /** 715 * Signals that compatibility booleans have been initialized according to 716 * target SDK versions. 717 */ 718 private static boolean sCompatibilityDone = false; 719 720 /** 721 * Use the old (broken) way of building MeasureSpecs. 722 */ 723 private static boolean sUseBrokenMakeMeasureSpec = false; 724 725 /** 726 * Ignore any optimizations using the measure cache. 727 */ 728 private static boolean sIgnoreMeasureCache = false; 729 730 /** 731 * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when 732 * calling setFlags. 733 */ 734 private static final int NOT_FOCUSABLE = 0x00000000; 735 736 /** 737 * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling 738 * setFlags. 739 */ 740 private static final int FOCUSABLE = 0x00000001; 741 742 /** 743 * Mask for use with setFlags indicating bits used for focus. 744 */ 745 private static final int FOCUSABLE_MASK = 0x00000001; 746 747 /** 748 * This view will adjust its padding to fit sytem windows (e.g. status bar) 749 */ 750 private static final int FITS_SYSTEM_WINDOWS = 0x00000002; 751 752 /** @hide */ 753 @IntDef({VISIBLE, INVISIBLE, GONE}) 754 @Retention(RetentionPolicy.SOURCE) 755 public @interface Visibility {} 756 757 /** 758 * This view is visible. 759 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 760 * android:visibility}. 761 */ 762 public static final int VISIBLE = 0x00000000; 763 764 /** 765 * This view is invisible, but it still takes up space for layout purposes. 766 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 767 * android:visibility}. 768 */ 769 public static final int INVISIBLE = 0x00000004; 770 771 /** 772 * This view is invisible, and it doesn't take any space for layout 773 * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 774 * android:visibility}. 775 */ 776 public static final int GONE = 0x00000008; 777 778 /** 779 * Mask for use with setFlags indicating bits used for visibility. 780 * {@hide} 781 */ 782 static final int VISIBILITY_MASK = 0x0000000C; 783 784 private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; 785 786 /** 787 * This view is enabled. Interpretation varies by subclass. 788 * Use with ENABLED_MASK when calling setFlags. 789 * {@hide} 790 */ 791 static final int ENABLED = 0x00000000; 792 793 /** 794 * This view is disabled. Interpretation varies by subclass. 795 * Use with ENABLED_MASK when calling setFlags. 796 * {@hide} 797 */ 798 static final int DISABLED = 0x00000020; 799 800 /** 801 * Mask for use with setFlags indicating bits used for indicating whether 802 * this view is enabled 803 * {@hide} 804 */ 805 static final int ENABLED_MASK = 0x00000020; 806 807 /** 808 * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be 809 * called and further optimizations will be performed. It is okay to have 810 * this flag set and a background. Use with DRAW_MASK when calling setFlags. 811 * {@hide} 812 */ 813 static final int WILL_NOT_DRAW = 0x00000080; 814 815 /** 816 * Mask for use with setFlags indicating bits used for indicating whether 817 * this view is will draw 818 * {@hide} 819 */ 820 static final int DRAW_MASK = 0x00000080; 821 822 /** 823 * <p>This view doesn't show scrollbars.</p> 824 * {@hide} 825 */ 826 static final int SCROLLBARS_NONE = 0x00000000; 827 828 /** 829 * <p>This view shows horizontal scrollbars.</p> 830 * {@hide} 831 */ 832 static final int SCROLLBARS_HORIZONTAL = 0x00000100; 833 834 /** 835 * <p>This view shows vertical scrollbars.</p> 836 * {@hide} 837 */ 838 static final int SCROLLBARS_VERTICAL = 0x00000200; 839 840 /** 841 * <p>Mask for use with setFlags indicating bits used for indicating which 842 * scrollbars are enabled.</p> 843 * {@hide} 844 */ 845 static final int SCROLLBARS_MASK = 0x00000300; 846 847 /** 848 * Indicates that the view should filter touches when its window is obscured. 849 * Refer to the class comments for more information about this security feature. 850 * {@hide} 851 */ 852 static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; 853 854 /** 855 * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate 856 * that they are optional and should be skipped if the window has 857 * requested system UI flags that ignore those insets for layout. 858 */ 859 static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; 860 861 /** 862 * <p>This view doesn't show fading edges.</p> 863 * {@hide} 864 */ 865 static final int FADING_EDGE_NONE = 0x00000000; 866 867 /** 868 * <p>This view shows horizontal fading edges.</p> 869 * {@hide} 870 */ 871 static final int FADING_EDGE_HORIZONTAL = 0x00001000; 872 873 /** 874 * <p>This view shows vertical fading edges.</p> 875 * {@hide} 876 */ 877 static final int FADING_EDGE_VERTICAL = 0x00002000; 878 879 /** 880 * <p>Mask for use with setFlags indicating bits used for indicating which 881 * fading edges are enabled.</p> 882 * {@hide} 883 */ 884 static final int FADING_EDGE_MASK = 0x00003000; 885 886 /** 887 * <p>Indicates this view can be clicked. When clickable, a View reacts 888 * to clicks by notifying the OnClickListener.<p> 889 * {@hide} 890 */ 891 static final int CLICKABLE = 0x00004000; 892 893 /** 894 * <p>Indicates this view is caching its drawing into a bitmap.</p> 895 * {@hide} 896 */ 897 static final int DRAWING_CACHE_ENABLED = 0x00008000; 898 899 /** 900 * <p>Indicates that no icicle should be saved for this view.<p> 901 * {@hide} 902 */ 903 static final int SAVE_DISABLED = 0x000010000; 904 905 /** 906 * <p>Mask for use with setFlags indicating bits used for the saveEnabled 907 * property.</p> 908 * {@hide} 909 */ 910 static final int SAVE_DISABLED_MASK = 0x000010000; 911 912 /** 913 * <p>Indicates that no drawing cache should ever be created for this view.<p> 914 * {@hide} 915 */ 916 static final int WILL_NOT_CACHE_DRAWING = 0x000020000; 917 918 /** 919 * <p>Indicates this view can take / keep focus when int touch mode.</p> 920 * {@hide} 921 */ 922 static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; 923 924 /** @hide */ 925 @Retention(RetentionPolicy.SOURCE) 926 @IntDef({DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_AUTO}) 927 public @interface DrawingCacheQuality {} 928 929 /** 930 * <p>Enables low quality mode for the drawing cache.</p> 931 */ 932 public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; 933 934 /** 935 * <p>Enables high quality mode for the drawing cache.</p> 936 */ 937 public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; 938 939 /** 940 * <p>Enables automatic quality mode for the drawing cache.</p> 941 */ 942 public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; 943 944 private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { 945 DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH 946 }; 947 948 /** 949 * <p>Mask for use with setFlags indicating bits used for the cache 950 * quality property.</p> 951 * {@hide} 952 */ 953 static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; 954 955 /** 956 * <p> 957 * Indicates this view can be long clicked. When long clickable, a View 958 * reacts to long clicks by notifying the OnLongClickListener or showing a 959 * context menu. 960 * </p> 961 * {@hide} 962 */ 963 static final int LONG_CLICKABLE = 0x00200000; 964 965 /** 966 * <p>Indicates that this view gets its drawable states from its direct parent 967 * and ignores its original internal states.</p> 968 * 969 * @hide 970 */ 971 static final int DUPLICATE_PARENT_STATE = 0x00400000; 972 973 /** @hide */ 974 @IntDef({ 975 SCROLLBARS_INSIDE_OVERLAY, 976 SCROLLBARS_INSIDE_INSET, 977 SCROLLBARS_OUTSIDE_OVERLAY, 978 SCROLLBARS_OUTSIDE_INSET 979 }) 980 @Retention(RetentionPolicy.SOURCE) 981 public @interface ScrollBarStyle {} 982 983 /** 984 * The scrollbar style to display the scrollbars inside the content area, 985 * without increasing the padding. The scrollbars will be overlaid with 986 * translucency on the view's content. 987 */ 988 public static final int SCROLLBARS_INSIDE_OVERLAY = 0; 989 990 /** 991 * The scrollbar style to display the scrollbars inside the padded area, 992 * increasing the padding of the view. The scrollbars will not overlap the 993 * content area of the view. 994 */ 995 public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; 996 997 /** 998 * The scrollbar style to display the scrollbars at the edge of the view, 999 * without increasing the padding. The scrollbars will be overlaid with 1000 * translucency. 1001 */ 1002 public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; 1003 1004 /** 1005 * The scrollbar style to display the scrollbars at the edge of the view, 1006 * increasing the padding of the view. The scrollbars will only overlap the 1007 * background, if any. 1008 */ 1009 public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; 1010 1011 /** 1012 * Mask to check if the scrollbar style is overlay or inset. 1013 * {@hide} 1014 */ 1015 static final int SCROLLBARS_INSET_MASK = 0x01000000; 1016 1017 /** 1018 * Mask to check if the scrollbar style is inside or outside. 1019 * {@hide} 1020 */ 1021 static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; 1022 1023 /** 1024 * Mask for scrollbar style. 1025 * {@hide} 1026 */ 1027 static final int SCROLLBARS_STYLE_MASK = 0x03000000; 1028 1029 /** 1030 * View flag indicating that the screen should remain on while the 1031 * window containing this view is visible to the user. This effectively 1032 * takes care of automatically setting the WindowManager's 1033 * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. 1034 */ 1035 public static final int KEEP_SCREEN_ON = 0x04000000; 1036 1037 /** 1038 * View flag indicating whether this view should have sound effects enabled 1039 * for events such as clicking and touching. 1040 */ 1041 public static final int SOUND_EFFECTS_ENABLED = 0x08000000; 1042 1043 /** 1044 * View flag indicating whether this view should have haptic feedback 1045 * enabled for events such as long presses. 1046 */ 1047 public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; 1048 1049 /** 1050 * <p>Indicates that the view hierarchy should stop saving state when 1051 * it reaches this view. If state saving is initiated immediately at 1052 * the view, it will be allowed. 1053 * {@hide} 1054 */ 1055 static final int PARENT_SAVE_DISABLED = 0x20000000; 1056 1057 /** 1058 * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> 1059 * {@hide} 1060 */ 1061 static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; 1062 1063 /** @hide */ 1064 @IntDef(flag = true, 1065 value = { 1066 FOCUSABLES_ALL, 1067 FOCUSABLES_TOUCH_MODE 1068 }) 1069 @Retention(RetentionPolicy.SOURCE) 1070 public @interface FocusableMode {} 1071 1072 /** 1073 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1074 * should add all focusable Views regardless if they are focusable in touch mode. 1075 */ 1076 public static final int FOCUSABLES_ALL = 0x00000000; 1077 1078 /** 1079 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1080 * should add only Views focusable in touch mode. 1081 */ 1082 public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; 1083 1084 /** @hide */ 1085 @IntDef({ 1086 FOCUS_BACKWARD, 1087 FOCUS_FORWARD, 1088 FOCUS_LEFT, 1089 FOCUS_UP, 1090 FOCUS_RIGHT, 1091 FOCUS_DOWN 1092 }) 1093 @Retention(RetentionPolicy.SOURCE) 1094 public @interface FocusDirection {} 1095 1096 /** @hide */ 1097 @IntDef({ 1098 FOCUS_LEFT, 1099 FOCUS_UP, 1100 FOCUS_RIGHT, 1101 FOCUS_DOWN 1102 }) 1103 @Retention(RetentionPolicy.SOURCE) 1104 public @interface FocusRealDirection {} // Like @FocusDirection, but without forward/backward 1105 1106 /** 1107 * Use with {@link #focusSearch(int)}. Move focus to the previous selectable 1108 * item. 1109 */ 1110 public static final int FOCUS_BACKWARD = 0x00000001; 1111 1112 /** 1113 * Use with {@link #focusSearch(int)}. Move focus to the next selectable 1114 * item. 1115 */ 1116 public static final int FOCUS_FORWARD = 0x00000002; 1117 1118 /** 1119 * Use with {@link #focusSearch(int)}. Move focus to the left. 1120 */ 1121 public static final int FOCUS_LEFT = 0x00000011; 1122 1123 /** 1124 * Use with {@link #focusSearch(int)}. Move focus up. 1125 */ 1126 public static final int FOCUS_UP = 0x00000021; 1127 1128 /** 1129 * Use with {@link #focusSearch(int)}. Move focus to the right. 1130 */ 1131 public static final int FOCUS_RIGHT = 0x00000042; 1132 1133 /** 1134 * Use with {@link #focusSearch(int)}. Move focus down. 1135 */ 1136 public static final int FOCUS_DOWN = 0x00000082; 1137 1138 /** 1139 * Bits of {@link #getMeasuredWidthAndState()} and 1140 * {@link #getMeasuredWidthAndState()} that provide the actual measured size. 1141 */ 1142 public static final int MEASURED_SIZE_MASK = 0x00ffffff; 1143 1144 /** 1145 * Bits of {@link #getMeasuredWidthAndState()} and 1146 * {@link #getMeasuredWidthAndState()} that provide the additional state bits. 1147 */ 1148 public static final int MEASURED_STATE_MASK = 0xff000000; 1149 1150 /** 1151 * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits 1152 * for functions that combine both width and height into a single int, 1153 * such as {@link #getMeasuredState()} and the childState argument of 1154 * {@link #resolveSizeAndState(int, int, int)}. 1155 */ 1156 public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; 1157 1158 /** 1159 * Bit of {@link #getMeasuredWidthAndState()} and 1160 * {@link #getMeasuredWidthAndState()} that indicates the measured size 1161 * is smaller that the space the view would like to have. 1162 */ 1163 public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; 1164 1165 /** 1166 * Base View state sets 1167 */ 1168 // Singles 1169 /** 1170 * Indicates the view has no states set. States are used with 1171 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1172 * view depending on its state. 1173 * 1174 * @see android.graphics.drawable.Drawable 1175 * @see #getDrawableState() 1176 */ 1177 protected static final int[] EMPTY_STATE_SET; 1178 /** 1179 * Indicates the view is enabled. States are used with 1180 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1181 * view depending on its state. 1182 * 1183 * @see android.graphics.drawable.Drawable 1184 * @see #getDrawableState() 1185 */ 1186 protected static final int[] ENABLED_STATE_SET; 1187 /** 1188 * Indicates the view is focused. States are used with 1189 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1190 * view depending on its state. 1191 * 1192 * @see android.graphics.drawable.Drawable 1193 * @see #getDrawableState() 1194 */ 1195 protected static final int[] FOCUSED_STATE_SET; 1196 /** 1197 * Indicates the view is selected. States are used with 1198 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1199 * view depending on its state. 1200 * 1201 * @see android.graphics.drawable.Drawable 1202 * @see #getDrawableState() 1203 */ 1204 protected static final int[] SELECTED_STATE_SET; 1205 /** 1206 * Indicates the view is pressed. States are used with 1207 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1208 * view depending on its state. 1209 * 1210 * @see android.graphics.drawable.Drawable 1211 * @see #getDrawableState() 1212 */ 1213 protected static final int[] PRESSED_STATE_SET; 1214 /** 1215 * Indicates the view's window has focus. States are used with 1216 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1217 * view depending on its state. 1218 * 1219 * @see android.graphics.drawable.Drawable 1220 * @see #getDrawableState() 1221 */ 1222 protected static final int[] WINDOW_FOCUSED_STATE_SET; 1223 // Doubles 1224 /** 1225 * Indicates the view is enabled and has the focus. 1226 * 1227 * @see #ENABLED_STATE_SET 1228 * @see #FOCUSED_STATE_SET 1229 */ 1230 protected static final int[] ENABLED_FOCUSED_STATE_SET; 1231 /** 1232 * Indicates the view is enabled and selected. 1233 * 1234 * @see #ENABLED_STATE_SET 1235 * @see #SELECTED_STATE_SET 1236 */ 1237 protected static final int[] ENABLED_SELECTED_STATE_SET; 1238 /** 1239 * Indicates the view is enabled and that its window has focus. 1240 * 1241 * @see #ENABLED_STATE_SET 1242 * @see #WINDOW_FOCUSED_STATE_SET 1243 */ 1244 protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; 1245 /** 1246 * Indicates the view is focused and selected. 1247 * 1248 * @see #FOCUSED_STATE_SET 1249 * @see #SELECTED_STATE_SET 1250 */ 1251 protected static final int[] FOCUSED_SELECTED_STATE_SET; 1252 /** 1253 * Indicates the view has the focus and that its window has the focus. 1254 * 1255 * @see #FOCUSED_STATE_SET 1256 * @see #WINDOW_FOCUSED_STATE_SET 1257 */ 1258 protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; 1259 /** 1260 * Indicates the view is selected and that its window has the focus. 1261 * 1262 * @see #SELECTED_STATE_SET 1263 * @see #WINDOW_FOCUSED_STATE_SET 1264 */ 1265 protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; 1266 // Triples 1267 /** 1268 * Indicates the view is enabled, focused and selected. 1269 * 1270 * @see #ENABLED_STATE_SET 1271 * @see #FOCUSED_STATE_SET 1272 * @see #SELECTED_STATE_SET 1273 */ 1274 protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; 1275 /** 1276 * Indicates the view is enabled, focused and its window has the focus. 1277 * 1278 * @see #ENABLED_STATE_SET 1279 * @see #FOCUSED_STATE_SET 1280 * @see #WINDOW_FOCUSED_STATE_SET 1281 */ 1282 protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1283 /** 1284 * Indicates the view is enabled, selected and its window has the focus. 1285 * 1286 * @see #ENABLED_STATE_SET 1287 * @see #SELECTED_STATE_SET 1288 * @see #WINDOW_FOCUSED_STATE_SET 1289 */ 1290 protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1291 /** 1292 * Indicates the view is focused, selected and its window has the focus. 1293 * 1294 * @see #FOCUSED_STATE_SET 1295 * @see #SELECTED_STATE_SET 1296 * @see #WINDOW_FOCUSED_STATE_SET 1297 */ 1298 protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1299 /** 1300 * Indicates the view is enabled, focused, selected and its window 1301 * has the focus. 1302 * 1303 * @see #ENABLED_STATE_SET 1304 * @see #FOCUSED_STATE_SET 1305 * @see #SELECTED_STATE_SET 1306 * @see #WINDOW_FOCUSED_STATE_SET 1307 */ 1308 protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1309 /** 1310 * Indicates the view is pressed and its window has the focus. 1311 * 1312 * @see #PRESSED_STATE_SET 1313 * @see #WINDOW_FOCUSED_STATE_SET 1314 */ 1315 protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; 1316 /** 1317 * Indicates the view is pressed and selected. 1318 * 1319 * @see #PRESSED_STATE_SET 1320 * @see #SELECTED_STATE_SET 1321 */ 1322 protected static final int[] PRESSED_SELECTED_STATE_SET; 1323 /** 1324 * Indicates the view is pressed, selected and its window has the focus. 1325 * 1326 * @see #PRESSED_STATE_SET 1327 * @see #SELECTED_STATE_SET 1328 * @see #WINDOW_FOCUSED_STATE_SET 1329 */ 1330 protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1331 /** 1332 * Indicates the view is pressed and focused. 1333 * 1334 * @see #PRESSED_STATE_SET 1335 * @see #FOCUSED_STATE_SET 1336 */ 1337 protected static final int[] PRESSED_FOCUSED_STATE_SET; 1338 /** 1339 * Indicates the view is pressed, focused and its window has the focus. 1340 * 1341 * @see #PRESSED_STATE_SET 1342 * @see #FOCUSED_STATE_SET 1343 * @see #WINDOW_FOCUSED_STATE_SET 1344 */ 1345 protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1346 /** 1347 * Indicates the view is pressed, focused and selected. 1348 * 1349 * @see #PRESSED_STATE_SET 1350 * @see #SELECTED_STATE_SET 1351 * @see #FOCUSED_STATE_SET 1352 */ 1353 protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; 1354 /** 1355 * Indicates the view is pressed, focused, selected and its window has the focus. 1356 * 1357 * @see #PRESSED_STATE_SET 1358 * @see #FOCUSED_STATE_SET 1359 * @see #SELECTED_STATE_SET 1360 * @see #WINDOW_FOCUSED_STATE_SET 1361 */ 1362 protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1363 /** 1364 * Indicates the view is pressed and enabled. 1365 * 1366 * @see #PRESSED_STATE_SET 1367 * @see #ENABLED_STATE_SET 1368 */ 1369 protected static final int[] PRESSED_ENABLED_STATE_SET; 1370 /** 1371 * Indicates the view is pressed, enabled and its window has the focus. 1372 * 1373 * @see #PRESSED_STATE_SET 1374 * @see #ENABLED_STATE_SET 1375 * @see #WINDOW_FOCUSED_STATE_SET 1376 */ 1377 protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; 1378 /** 1379 * Indicates the view is pressed, enabled and selected. 1380 * 1381 * @see #PRESSED_STATE_SET 1382 * @see #ENABLED_STATE_SET 1383 * @see #SELECTED_STATE_SET 1384 */ 1385 protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; 1386 /** 1387 * Indicates the view is pressed, enabled, selected and its window has the 1388 * focus. 1389 * 1390 * @see #PRESSED_STATE_SET 1391 * @see #ENABLED_STATE_SET 1392 * @see #SELECTED_STATE_SET 1393 * @see #WINDOW_FOCUSED_STATE_SET 1394 */ 1395 protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1396 /** 1397 * Indicates the view is pressed, enabled and focused. 1398 * 1399 * @see #PRESSED_STATE_SET 1400 * @see #ENABLED_STATE_SET 1401 * @see #FOCUSED_STATE_SET 1402 */ 1403 protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; 1404 /** 1405 * Indicates the view is pressed, enabled, focused and its window has the 1406 * focus. 1407 * 1408 * @see #PRESSED_STATE_SET 1409 * @see #ENABLED_STATE_SET 1410 * @see #FOCUSED_STATE_SET 1411 * @see #WINDOW_FOCUSED_STATE_SET 1412 */ 1413 protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1414 /** 1415 * Indicates the view is pressed, enabled, focused and selected. 1416 * 1417 * @see #PRESSED_STATE_SET 1418 * @see #ENABLED_STATE_SET 1419 * @see #SELECTED_STATE_SET 1420 * @see #FOCUSED_STATE_SET 1421 */ 1422 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; 1423 /** 1424 * Indicates the view is pressed, enabled, focused, selected and its window 1425 * has the focus. 1426 * 1427 * @see #PRESSED_STATE_SET 1428 * @see #ENABLED_STATE_SET 1429 * @see #SELECTED_STATE_SET 1430 * @see #FOCUSED_STATE_SET 1431 * @see #WINDOW_FOCUSED_STATE_SET 1432 */ 1433 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1434 1435 /** 1436 * The order here is very important to {@link #getDrawableState()} 1437 */ 1438 private static final int[][] VIEW_STATE_SETS; 1439 1440 static final int VIEW_STATE_WINDOW_FOCUSED = 1; 1441 static final int VIEW_STATE_SELECTED = 1 << 1; 1442 static final int VIEW_STATE_FOCUSED = 1 << 2; 1443 static final int VIEW_STATE_ENABLED = 1 << 3; 1444 static final int VIEW_STATE_PRESSED = 1 << 4; 1445 static final int VIEW_STATE_ACTIVATED = 1 << 5; 1446 static final int VIEW_STATE_ACCELERATED = 1 << 6; 1447 static final int VIEW_STATE_HOVERED = 1 << 7; 1448 static final int VIEW_STATE_DRAG_CAN_ACCEPT = 1 << 8; 1449 static final int VIEW_STATE_DRAG_HOVERED = 1 << 9; 1450 1451 static final int[] VIEW_STATE_IDS = new int[] { 1452 R.attr.state_window_focused, VIEW_STATE_WINDOW_FOCUSED, 1453 R.attr.state_selected, VIEW_STATE_SELECTED, 1454 R.attr.state_focused, VIEW_STATE_FOCUSED, 1455 R.attr.state_enabled, VIEW_STATE_ENABLED, 1456 R.attr.state_pressed, VIEW_STATE_PRESSED, 1457 R.attr.state_activated, VIEW_STATE_ACTIVATED, 1458 R.attr.state_accelerated, VIEW_STATE_ACCELERATED, 1459 R.attr.state_hovered, VIEW_STATE_HOVERED, 1460 R.attr.state_drag_can_accept, VIEW_STATE_DRAG_CAN_ACCEPT, 1461 R.attr.state_drag_hovered, VIEW_STATE_DRAG_HOVERED 1462 }; 1463 1464 static { 1465 if ((VIEW_STATE_IDS.length/2) != R.styleable.ViewDrawableStates.length) { 1466 throw new IllegalStateException( 1467 "VIEW_STATE_IDs array length does not match ViewDrawableStates style array"); 1468 } 1469 int[] orderedIds = new int[VIEW_STATE_IDS.length]; 1470 for (int i = 0; i < R.styleable.ViewDrawableStates.length; i++) { 1471 int viewState = R.styleable.ViewDrawableStates[i]; 1472 for (int j = 0; j<VIEW_STATE_IDS.length; j += 2) { 1473 if (VIEW_STATE_IDS[j] == viewState) { 1474 orderedIds[i * 2] = viewState; 1475 orderedIds[i * 2 + 1] = VIEW_STATE_IDS[j + 1]; 1476 } 1477 } 1478 } 1479 final int NUM_BITS = VIEW_STATE_IDS.length / 2; 1480 VIEW_STATE_SETS = new int[1 << NUM_BITS][]; 1481 for (int i = 0; i < VIEW_STATE_SETS.length; i++) { 1482 int numBits = Integer.bitCount(i); 1483 int[] set = new int[numBits]; 1484 int pos = 0; 1485 for (int j = 0; j < orderedIds.length; j += 2) { 1486 if ((i & orderedIds[j+1]) != 0) { 1487 set[pos++] = orderedIds[j]; 1488 } 1489 } 1490 VIEW_STATE_SETS[i] = set; 1491 } 1492 1493 EMPTY_STATE_SET = VIEW_STATE_SETS[0]; 1494 WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_WINDOW_FOCUSED]; 1495 SELECTED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_SELECTED]; 1496 SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1497 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED]; 1498 FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_FOCUSED]; 1499 FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1500 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED]; 1501 FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1502 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED]; 1503 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1504 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1505 | VIEW_STATE_FOCUSED]; 1506 ENABLED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_ENABLED]; 1507 ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1508 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED]; 1509 ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1510 VIEW_STATE_SELECTED | VIEW_STATE_ENABLED]; 1511 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1512 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1513 | VIEW_STATE_ENABLED]; 1514 ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1515 VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED]; 1516 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1517 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1518 | VIEW_STATE_ENABLED]; 1519 ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1520 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1521 | VIEW_STATE_ENABLED]; 1522 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1523 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1524 | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED]; 1525 1526 PRESSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_PRESSED]; 1527 PRESSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1528 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_PRESSED]; 1529 PRESSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1530 VIEW_STATE_SELECTED | VIEW_STATE_PRESSED]; 1531 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1532 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1533 | VIEW_STATE_PRESSED]; 1534 PRESSED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1535 VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; 1536 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1537 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1538 | VIEW_STATE_PRESSED]; 1539 PRESSED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1540 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1541 | VIEW_STATE_PRESSED]; 1542 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1543 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1544 | VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; 1545 PRESSED_ENABLED_STATE_SET = VIEW_STATE_SETS[ 1546 VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1547 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1548 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED 1549 | VIEW_STATE_PRESSED]; 1550 PRESSED_ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1551 VIEW_STATE_SELECTED | VIEW_STATE_ENABLED 1552 | VIEW_STATE_PRESSED]; 1553 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1554 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1555 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1556 PRESSED_ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1557 VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED 1558 | VIEW_STATE_PRESSED]; 1559 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1560 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1561 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1562 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1563 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1564 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1565 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1566 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1567 | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED 1568 | VIEW_STATE_PRESSED]; 1569 } 1570 1571 /** 1572 * Accessibility event types that are dispatched for text population. 1573 */ 1574 private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = 1575 AccessibilityEvent.TYPE_VIEW_CLICKED 1576 | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED 1577 | AccessibilityEvent.TYPE_VIEW_SELECTED 1578 | AccessibilityEvent.TYPE_VIEW_FOCUSED 1579 | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED 1580 | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER 1581 | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT 1582 | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED 1583 | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED 1584 | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED 1585 | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; 1586 1587 /** 1588 * Temporary Rect currently for use in setBackground(). This will probably 1589 * be extended in the future to hold our own class with more than just 1590 * a Rect. :) 1591 */ 1592 static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); 1593 1594 /** 1595 * Map used to store views' tags. 1596 */ 1597 private SparseArray<Object> mKeyedTags; 1598 1599 /** 1600 * The next available accessibility id. 1601 */ 1602 private static int sNextAccessibilityViewId; 1603 1604 /** 1605 * The animation currently associated with this view. 1606 * @hide 1607 */ 1608 protected Animation mCurrentAnimation = null; 1609 1610 /** 1611 * Width as measured during measure pass. 1612 * {@hide} 1613 */ 1614 @ViewDebug.ExportedProperty(category = "measurement") 1615 int mMeasuredWidth; 1616 1617 /** 1618 * Height as measured during measure pass. 1619 * {@hide} 1620 */ 1621 @ViewDebug.ExportedProperty(category = "measurement") 1622 int mMeasuredHeight; 1623 1624 /** 1625 * Flag to indicate that this view was marked INVALIDATED, or had its display list 1626 * invalidated, prior to the current drawing iteration. If true, the view must re-draw 1627 * its display list. This flag, used only when hw accelerated, allows us to clear the 1628 * flag while retaining this information until it's needed (at getDisplayList() time and 1629 * in drawChild(), when we decide to draw a view's children's display lists into our own). 1630 * 1631 * {@hide} 1632 */ 1633 boolean mRecreateDisplayList = false; 1634 1635 /** 1636 * The view's identifier. 1637 * {@hide} 1638 * 1639 * @see #setId(int) 1640 * @see #getId() 1641 */ 1642 @ViewDebug.ExportedProperty(resolveId = true) 1643 int mID = NO_ID; 1644 1645 /** 1646 * The stable ID of this view for accessibility purposes. 1647 */ 1648 int mAccessibilityViewId = NO_ID; 1649 1650 private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 1651 1652 SendViewStateChangedAccessibilityEvent mSendViewStateChangedAccessibilityEvent; 1653 1654 /** 1655 * The view's tag. 1656 * {@hide} 1657 * 1658 * @see #setTag(Object) 1659 * @see #getTag() 1660 */ 1661 protected Object mTag = null; 1662 1663 // for mPrivateFlags: 1664 /** {@hide} */ 1665 static final int PFLAG_WANTS_FOCUS = 0x00000001; 1666 /** {@hide} */ 1667 static final int PFLAG_FOCUSED = 0x00000002; 1668 /** {@hide} */ 1669 static final int PFLAG_SELECTED = 0x00000004; 1670 /** {@hide} */ 1671 static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; 1672 /** {@hide} */ 1673 static final int PFLAG_HAS_BOUNDS = 0x00000010; 1674 /** {@hide} */ 1675 static final int PFLAG_DRAWN = 0x00000020; 1676 /** 1677 * When this flag is set, this view is running an animation on behalf of its 1678 * children and should therefore not cancel invalidate requests, even if they 1679 * lie outside of this view's bounds. 1680 * 1681 * {@hide} 1682 */ 1683 static final int PFLAG_DRAW_ANIMATION = 0x00000040; 1684 /** {@hide} */ 1685 static final int PFLAG_SKIP_DRAW = 0x00000080; 1686 /** {@hide} */ 1687 static final int PFLAG_ONLY_DRAWS_BACKGROUND = 0x00000100; 1688 /** {@hide} */ 1689 static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; 1690 /** {@hide} */ 1691 static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; 1692 /** {@hide} */ 1693 static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; 1694 /** {@hide} */ 1695 static final int PFLAG_FORCE_LAYOUT = 0x00001000; 1696 /** {@hide} */ 1697 static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; 1698 1699 private static final int PFLAG_PRESSED = 0x00004000; 1700 1701 /** {@hide} */ 1702 static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; 1703 /** 1704 * Flag used to indicate that this view should be drawn once more (and only once 1705 * more) after its animation has completed. 1706 * {@hide} 1707 */ 1708 static final int PFLAG_ANIMATION_STARTED = 0x00010000; 1709 1710 private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; 1711 1712 /** 1713 * Indicates that the View returned true when onSetAlpha() was called and that 1714 * the alpha must be restored. 1715 * {@hide} 1716 */ 1717 static final int PFLAG_ALPHA_SET = 0x00040000; 1718 1719 /** 1720 * Set by {@link #setScrollContainer(boolean)}. 1721 */ 1722 static final int PFLAG_SCROLL_CONTAINER = 0x00080000; 1723 1724 /** 1725 * Set by {@link #setScrollContainer(boolean)}. 1726 */ 1727 static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; 1728 1729 /** 1730 * View flag indicating whether this view was invalidated (fully or partially.) 1731 * 1732 * @hide 1733 */ 1734 static final int PFLAG_DIRTY = 0x00200000; 1735 1736 /** 1737 * View flag indicating whether this view was invalidated by an opaque 1738 * invalidate request. 1739 * 1740 * @hide 1741 */ 1742 static final int PFLAG_DIRTY_OPAQUE = 0x00400000; 1743 1744 /** 1745 * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. 1746 * 1747 * @hide 1748 */ 1749 static final int PFLAG_DIRTY_MASK = 0x00600000; 1750 1751 /** 1752 * Indicates whether the background is opaque. 1753 * 1754 * @hide 1755 */ 1756 static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; 1757 1758 /** 1759 * Indicates whether the scrollbars are opaque. 1760 * 1761 * @hide 1762 */ 1763 static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; 1764 1765 /** 1766 * Indicates whether the view is opaque. 1767 * 1768 * @hide 1769 */ 1770 static final int PFLAG_OPAQUE_MASK = 0x01800000; 1771 1772 /** 1773 * Indicates a prepressed state; 1774 * the short time between ACTION_DOWN and recognizing 1775 * a 'real' press. Prepressed is used to recognize quick taps 1776 * even when they are shorter than ViewConfiguration.getTapTimeout(). 1777 * 1778 * @hide 1779 */ 1780 private static final int PFLAG_PREPRESSED = 0x02000000; 1781 1782 /** 1783 * Indicates whether the view is temporarily detached. 1784 * 1785 * @hide 1786 */ 1787 static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; 1788 1789 /** 1790 * Indicates that we should awaken scroll bars once attached 1791 * 1792 * @hide 1793 */ 1794 private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; 1795 1796 /** 1797 * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. 1798 * @hide 1799 */ 1800 private static final int PFLAG_HOVERED = 0x10000000; 1801 1802 /** 1803 * no longer needed, should be reused 1804 */ 1805 private static final int PFLAG_DOES_NOTHING_REUSE_PLEASE = 0x20000000; 1806 1807 /** {@hide} */ 1808 static final int PFLAG_ACTIVATED = 0x40000000; 1809 1810 /** 1811 * Indicates that this view was specifically invalidated, not just dirtied because some 1812 * child view was invalidated. The flag is used to determine when we need to recreate 1813 * a view's display list (as opposed to just returning a reference to its existing 1814 * display list). 1815 * 1816 * @hide 1817 */ 1818 static final int PFLAG_INVALIDATED = 0x80000000; 1819 1820 /** 1821 * Masks for mPrivateFlags2, as generated by dumpFlags(): 1822 * 1823 * |-------|-------|-------|-------| 1824 * 1 PFLAG2_DRAG_CAN_ACCEPT 1825 * 1 PFLAG2_DRAG_HOVERED 1826 * 11 PFLAG2_LAYOUT_DIRECTION_MASK 1827 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 1828 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED 1829 * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 1830 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] 1831 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] 1832 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] 1833 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] 1834 * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] 1835 * 111 PFLAG2_TEXT_DIRECTION_MASK 1836 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED 1837 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT 1838 * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK 1839 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] 1840 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] 1841 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] 1842 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] 1843 * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] 1844 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] 1845 * 111 PFLAG2_TEXT_ALIGNMENT_MASK 1846 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED 1847 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT 1848 * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK 1849 * 111 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK 1850 * 11 PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK 1851 * 1 PFLAG2_ACCESSIBILITY_FOCUSED 1852 * 1 PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED 1853 * 1 PFLAG2_VIEW_QUICK_REJECTED 1854 * 1 PFLAG2_PADDING_RESOLVED 1855 * 1 PFLAG2_DRAWABLE_RESOLVED 1856 * 1 PFLAG2_HAS_TRANSIENT_STATE 1857 * |-------|-------|-------|-------| 1858 */ 1859 1860 /** 1861 * Indicates that this view has reported that it can accept the current drag's content. 1862 * Cleared when the drag operation concludes. 1863 * @hide 1864 */ 1865 static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; 1866 1867 /** 1868 * Indicates that this view is currently directly under the drag location in a 1869 * drag-and-drop operation involving content that it can accept. Cleared when 1870 * the drag exits the view, or when the drag operation concludes. 1871 * @hide 1872 */ 1873 static final int PFLAG2_DRAG_HOVERED = 0x00000002; 1874 1875 /** @hide */ 1876 @IntDef({ 1877 LAYOUT_DIRECTION_LTR, 1878 LAYOUT_DIRECTION_RTL, 1879 LAYOUT_DIRECTION_INHERIT, 1880 LAYOUT_DIRECTION_LOCALE 1881 }) 1882 @Retention(RetentionPolicy.SOURCE) 1883 // Not called LayoutDirection to avoid conflict with android.util.LayoutDirection 1884 public @interface LayoutDir {} 1885 1886 /** @hide */ 1887 @IntDef({ 1888 LAYOUT_DIRECTION_LTR, 1889 LAYOUT_DIRECTION_RTL 1890 }) 1891 @Retention(RetentionPolicy.SOURCE) 1892 public @interface ResolvedLayoutDir {} 1893 1894 /** 1895 * Horizontal layout direction of this view is from Left to Right. 1896 * Use with {@link #setLayoutDirection}. 1897 */ 1898 public static final int LAYOUT_DIRECTION_LTR = LayoutDirection.LTR; 1899 1900 /** 1901 * Horizontal layout direction of this view is from Right to Left. 1902 * Use with {@link #setLayoutDirection}. 1903 */ 1904 public static final int LAYOUT_DIRECTION_RTL = LayoutDirection.RTL; 1905 1906 /** 1907 * Horizontal layout direction of this view is inherited from its parent. 1908 * Use with {@link #setLayoutDirection}. 1909 */ 1910 public static final int LAYOUT_DIRECTION_INHERIT = LayoutDirection.INHERIT; 1911 1912 /** 1913 * Horizontal layout direction of this view is from deduced from the default language 1914 * script for the locale. Use with {@link #setLayoutDirection}. 1915 */ 1916 public static final int LAYOUT_DIRECTION_LOCALE = LayoutDirection.LOCALE; 1917 1918 /** 1919 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 1920 * @hide 1921 */ 1922 static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; 1923 1924 /** 1925 * Mask for use with private flags indicating bits used for horizontal layout direction. 1926 * @hide 1927 */ 1928 static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1929 1930 /** 1931 * Indicates whether the view horizontal layout direction has been resolved and drawn to the 1932 * right-to-left direction. 1933 * @hide 1934 */ 1935 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1936 1937 /** 1938 * Indicates whether the view horizontal layout direction has been resolved. 1939 * @hide 1940 */ 1941 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1942 1943 /** 1944 * Mask for use with private flags indicating bits used for resolved horizontal layout direction. 1945 * @hide 1946 */ 1947 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C 1948 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1949 1950 /* 1951 * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct 1952 * flag value. 1953 * @hide 1954 */ 1955 private static final int[] LAYOUT_DIRECTION_FLAGS = { 1956 LAYOUT_DIRECTION_LTR, 1957 LAYOUT_DIRECTION_RTL, 1958 LAYOUT_DIRECTION_INHERIT, 1959 LAYOUT_DIRECTION_LOCALE 1960 }; 1961 1962 /** 1963 * Default horizontal layout direction. 1964 */ 1965 private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; 1966 1967 /** 1968 * Default horizontal layout direction. 1969 * @hide 1970 */ 1971 static final int LAYOUT_DIRECTION_RESOLVED_DEFAULT = LAYOUT_DIRECTION_LTR; 1972 1973 /** 1974 * Text direction is inherited thru {@link ViewGroup} 1975 */ 1976 public static final int TEXT_DIRECTION_INHERIT = 0; 1977 1978 /** 1979 * Text direction is using "first strong algorithm". The first strong directional character 1980 * determines the paragraph direction. If there is no strong directional character, the 1981 * paragraph direction is the view's resolved layout direction. 1982 */ 1983 public static final int TEXT_DIRECTION_FIRST_STRONG = 1; 1984 1985 /** 1986 * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains 1987 * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. 1988 * If there are neither, the paragraph direction is the view's resolved layout direction. 1989 */ 1990 public static final int TEXT_DIRECTION_ANY_RTL = 2; 1991 1992 /** 1993 * Text direction is forced to LTR. 1994 */ 1995 public static final int TEXT_DIRECTION_LTR = 3; 1996 1997 /** 1998 * Text direction is forced to RTL. 1999 */ 2000 public static final int TEXT_DIRECTION_RTL = 4; 2001 2002 /** 2003 * Text direction is coming from the system Locale. 2004 */ 2005 public static final int TEXT_DIRECTION_LOCALE = 5; 2006 2007 /** 2008 * Default text direction is inherited 2009 */ 2010 private static final int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; 2011 2012 /** 2013 * Default resolved text direction 2014 * @hide 2015 */ 2016 static final int TEXT_DIRECTION_RESOLVED_DEFAULT = TEXT_DIRECTION_FIRST_STRONG; 2017 2018 /** 2019 * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) 2020 * @hide 2021 */ 2022 static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; 2023 2024 /** 2025 * Mask for use with private flags indicating bits used for text direction. 2026 * @hide 2027 */ 2028 static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 2029 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2030 2031 /** 2032 * Array of text direction flags for mapping attribute "textDirection" to correct 2033 * flag value. 2034 * @hide 2035 */ 2036 private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { 2037 TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2038 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2039 TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2040 TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2041 TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2042 TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT 2043 }; 2044 2045 /** 2046 * Indicates whether the view text direction has been resolved. 2047 * @hide 2048 */ 2049 static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 2050 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2051 2052 /** 2053 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2054 * @hide 2055 */ 2056 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; 2057 2058 /** 2059 * Mask for use with private flags indicating bits used for resolved text direction. 2060 * @hide 2061 */ 2062 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 2063 << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2064 2065 /** 2066 * Indicates whether the view text direction has been resolved to the "first strong" heuristic. 2067 * @hide 2068 */ 2069 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = 2070 TEXT_DIRECTION_RESOLVED_DEFAULT << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2071 2072 /** @hide */ 2073 @IntDef({ 2074 TEXT_ALIGNMENT_INHERIT, 2075 TEXT_ALIGNMENT_GRAVITY, 2076 TEXT_ALIGNMENT_CENTER, 2077 TEXT_ALIGNMENT_TEXT_START, 2078 TEXT_ALIGNMENT_TEXT_END, 2079 TEXT_ALIGNMENT_VIEW_START, 2080 TEXT_ALIGNMENT_VIEW_END 2081 }) 2082 @Retention(RetentionPolicy.SOURCE) 2083 public @interface TextAlignment {} 2084 2085 /** 2086 * Default text alignment. The text alignment of this View is inherited from its parent. 2087 * Use with {@link #setTextAlignment(int)} 2088 */ 2089 public static final int TEXT_ALIGNMENT_INHERIT = 0; 2090 2091 /** 2092 * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, 2093 * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph’s text direction. 2094 * 2095 * Use with {@link #setTextAlignment(int)} 2096 */ 2097 public static final int TEXT_ALIGNMENT_GRAVITY = 1; 2098 2099 /** 2100 * Align to the start of the paragraph, e.g. ALIGN_NORMAL. 2101 * 2102 * Use with {@link #setTextAlignment(int)} 2103 */ 2104 public static final int TEXT_ALIGNMENT_TEXT_START = 2; 2105 2106 /** 2107 * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. 2108 * 2109 * Use with {@link #setTextAlignment(int)} 2110 */ 2111 public static final int TEXT_ALIGNMENT_TEXT_END = 3; 2112 2113 /** 2114 * Center the paragraph, e.g. ALIGN_CENTER. 2115 * 2116 * Use with {@link #setTextAlignment(int)} 2117 */ 2118 public static final int TEXT_ALIGNMENT_CENTER = 4; 2119 2120 /** 2121 * Align to the start of the view, which is ALIGN_LEFT if the view’s resolved 2122 * layoutDirection is LTR, and ALIGN_RIGHT otherwise. 2123 * 2124 * Use with {@link #setTextAlignment(int)} 2125 */ 2126 public static final int TEXT_ALIGNMENT_VIEW_START = 5; 2127 2128 /** 2129 * Align to the end of the view, which is ALIGN_RIGHT if the view’s resolved 2130 * layoutDirection is LTR, and ALIGN_LEFT otherwise. 2131 * 2132 * Use with {@link #setTextAlignment(int)} 2133 */ 2134 public static final int TEXT_ALIGNMENT_VIEW_END = 6; 2135 2136 /** 2137 * Default text alignment is inherited 2138 */ 2139 private static final int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2140 2141 /** 2142 * Default resolved text alignment 2143 * @hide 2144 */ 2145 static final int TEXT_ALIGNMENT_RESOLVED_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2146 2147 /** 2148 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2149 * @hide 2150 */ 2151 static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; 2152 2153 /** 2154 * Mask for use with private flags indicating bits used for text alignment. 2155 * @hide 2156 */ 2157 static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2158 2159 /** 2160 * Array of text direction flags for mapping attribute "textAlignment" to correct 2161 * flag value. 2162 * @hide 2163 */ 2164 private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { 2165 TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2166 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2167 TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2168 TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2169 TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2170 TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2171 TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 2172 }; 2173 2174 /** 2175 * Indicates whether the view text alignment has been resolved. 2176 * @hide 2177 */ 2178 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2179 2180 /** 2181 * Bit shift to get the resolved text alignment. 2182 * @hide 2183 */ 2184 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; 2185 2186 /** 2187 * Mask for use with private flags indicating bits used for text alignment. 2188 * @hide 2189 */ 2190 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 2191 << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2192 2193 /** 2194 * Indicates whether if the view text alignment has been resolved to gravity 2195 */ 2196 private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = 2197 TEXT_ALIGNMENT_RESOLVED_DEFAULT << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2198 2199 // Accessiblity constants for mPrivateFlags2 2200 2201 /** 2202 * Shift for the bits in {@link #mPrivateFlags2} related to the 2203 * "importantForAccessibility" attribute. 2204 */ 2205 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; 2206 2207 /** 2208 * Automatically determine whether a view is important for accessibility. 2209 */ 2210 public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; 2211 2212 /** 2213 * The view is important for accessibility. 2214 */ 2215 public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; 2216 2217 /** 2218 * The view is not important for accessibility. 2219 */ 2220 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; 2221 2222 /** 2223 * The view is not important for accessibility, nor are any of its 2224 * descendant views. 2225 */ 2226 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 0x00000004; 2227 2228 /** 2229 * The default whether the view is important for accessibility. 2230 */ 2231 static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; 2232 2233 /** 2234 * Mask for obtainig the bits which specify how to determine 2235 * whether a view is important for accessibility. 2236 */ 2237 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO 2238 | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO 2239 | IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) 2240 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2241 2242 /** 2243 * Shift for the bits in {@link #mPrivateFlags2} related to the 2244 * "accessibilityLiveRegion" attribute. 2245 */ 2246 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT = 23; 2247 2248 /** 2249 * Live region mode specifying that accessibility services should not 2250 * automatically announce changes to this view. This is the default live 2251 * region mode for most views. 2252 * <p> 2253 * Use with {@link #setAccessibilityLiveRegion(int)}. 2254 */ 2255 public static final int ACCESSIBILITY_LIVE_REGION_NONE = 0x00000000; 2256 2257 /** 2258 * Live region mode specifying that accessibility services should announce 2259 * changes to this view. 2260 * <p> 2261 * Use with {@link #setAccessibilityLiveRegion(int)}. 2262 */ 2263 public static final int ACCESSIBILITY_LIVE_REGION_POLITE = 0x00000001; 2264 2265 /** 2266 * Live region mode specifying that accessibility services should interrupt 2267 * ongoing speech to immediately announce changes to this view. 2268 * <p> 2269 * Use with {@link #setAccessibilityLiveRegion(int)}. 2270 */ 2271 public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 0x00000002; 2272 2273 /** 2274 * The default whether the view is important for accessibility. 2275 */ 2276 static final int ACCESSIBILITY_LIVE_REGION_DEFAULT = ACCESSIBILITY_LIVE_REGION_NONE; 2277 2278 /** 2279 * Mask for obtaining the bits which specify a view's accessibility live 2280 * region mode. 2281 */ 2282 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK = (ACCESSIBILITY_LIVE_REGION_NONE 2283 | ACCESSIBILITY_LIVE_REGION_POLITE | ACCESSIBILITY_LIVE_REGION_ASSERTIVE) 2284 << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 2285 2286 /** 2287 * Flag indicating whether a view has accessibility focus. 2288 */ 2289 static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x04000000; 2290 2291 /** 2292 * Flag whether the accessibility state of the subtree rooted at this view changed. 2293 */ 2294 static final int PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED = 0x08000000; 2295 2296 /** 2297 * Flag indicating whether a view failed the quickReject() check in draw(). This condition 2298 * is used to check whether later changes to the view's transform should invalidate the 2299 * view to force the quickReject test to run again. 2300 */ 2301 static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; 2302 2303 /** 2304 * Flag indicating that start/end padding has been resolved into left/right padding 2305 * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} 2306 * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved 2307 * during measurement. In some special cases this is required such as when an adapter-based 2308 * view measures prospective children without attaching them to a window. 2309 */ 2310 static final int PFLAG2_PADDING_RESOLVED = 0x20000000; 2311 2312 /** 2313 * Flag indicating that the start/end drawables has been resolved into left/right ones. 2314 */ 2315 static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; 2316 2317 /** 2318 * Indicates that the view is tracking some sort of transient state 2319 * that the app should not need to be aware of, but that the framework 2320 * should take special care to preserve. 2321 */ 2322 static final int PFLAG2_HAS_TRANSIENT_STATE = 0x80000000; 2323 2324 /** 2325 * Group of bits indicating that RTL properties resolution is done. 2326 */ 2327 static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | 2328 PFLAG2_TEXT_DIRECTION_RESOLVED | 2329 PFLAG2_TEXT_ALIGNMENT_RESOLVED | 2330 PFLAG2_PADDING_RESOLVED | 2331 PFLAG2_DRAWABLE_RESOLVED; 2332 2333 // There are a couple of flags left in mPrivateFlags2 2334 2335 /* End of masks for mPrivateFlags2 */ 2336 2337 /** 2338 * Masks for mPrivateFlags3, as generated by dumpFlags(): 2339 * 2340 * |-------|-------|-------|-------| 2341 * 1 PFLAG3_VIEW_IS_ANIMATING_TRANSFORM 2342 * 1 PFLAG3_VIEW_IS_ANIMATING_ALPHA 2343 * 1 PFLAG3_IS_LAID_OUT 2344 * 1 PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT 2345 * 1 PFLAG3_CALLED_SUPER 2346 * |-------|-------|-------|-------| 2347 */ 2348 2349 /** 2350 * Flag indicating that view has a transform animation set on it. This is used to track whether 2351 * an animation is cleared between successive frames, in order to tell the associated 2352 * DisplayList to clear its animation matrix. 2353 */ 2354 static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; 2355 2356 /** 2357 * Flag indicating that view has an alpha animation set on it. This is used to track whether an 2358 * animation is cleared between successive frames, in order to tell the associated 2359 * DisplayList to restore its alpha value. 2360 */ 2361 static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; 2362 2363 /** 2364 * Flag indicating that the view has been through at least one layout since it 2365 * was last attached to a window. 2366 */ 2367 static final int PFLAG3_IS_LAID_OUT = 0x4; 2368 2369 /** 2370 * Flag indicating that a call to measure() was skipped and should be done 2371 * instead when layout() is invoked. 2372 */ 2373 static final int PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT = 0x8; 2374 2375 /** 2376 * Flag indicating that an overridden method correctly called down to 2377 * the superclass implementation as required by the API spec. 2378 */ 2379 static final int PFLAG3_CALLED_SUPER = 0x10; 2380 2381 /** 2382 * Flag indicating that we're in the process of applying window insets. 2383 */ 2384 static final int PFLAG3_APPLYING_INSETS = 0x20; 2385 2386 /** 2387 * Flag indicating that we're in the process of fitting system windows using the old method. 2388 */ 2389 static final int PFLAG3_FITTING_SYSTEM_WINDOWS = 0x40; 2390 2391 /** 2392 * Flag indicating that nested scrolling is enabled for this view. 2393 * The view will optionally cooperate with views up its parent chain to allow for 2394 * integrated nested scrolling along the same axis. 2395 */ 2396 static final int PFLAG3_NESTED_SCROLLING_ENABLED = 0x80; 2397 2398 /* End of masks for mPrivateFlags3 */ 2399 2400 static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; 2401 2402 /** 2403 * Always allow a user to over-scroll this view, provided it is a 2404 * view that can scroll. 2405 * 2406 * @see #getOverScrollMode() 2407 * @see #setOverScrollMode(int) 2408 */ 2409 public static final int OVER_SCROLL_ALWAYS = 0; 2410 2411 /** 2412 * Allow a user to over-scroll this view only if the content is large 2413 * enough to meaningfully scroll, provided it is a view that can scroll. 2414 * 2415 * @see #getOverScrollMode() 2416 * @see #setOverScrollMode(int) 2417 */ 2418 public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; 2419 2420 /** 2421 * Never allow a user to over-scroll this view. 2422 * 2423 * @see #getOverScrollMode() 2424 * @see #setOverScrollMode(int) 2425 */ 2426 public static final int OVER_SCROLL_NEVER = 2; 2427 2428 /** 2429 * Special constant for {@link #setSystemUiVisibility(int)}: View has 2430 * requested the system UI (status bar) to be visible (the default). 2431 * 2432 * @see #setSystemUiVisibility(int) 2433 */ 2434 public static final int SYSTEM_UI_FLAG_VISIBLE = 0; 2435 2436 /** 2437 * Flag for {@link #setSystemUiVisibility(int)}: View has requested the 2438 * system UI to enter an unobtrusive "low profile" mode. 2439 * 2440 * <p>This is for use in games, book readers, video players, or any other 2441 * "immersive" application where the usual system chrome is deemed too distracting. 2442 * 2443 * <p>In low profile mode, the status bar and/or navigation icons may dim. 2444 * 2445 * @see #setSystemUiVisibility(int) 2446 */ 2447 public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; 2448 2449 /** 2450 * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the 2451 * system navigation be temporarily hidden. 2452 * 2453 * <p>This is an even less obtrusive state than that called for by 2454 * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls 2455 * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause 2456 * those to disappear. This is useful (in conjunction with the 2457 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and 2458 * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} 2459 * window flags) for displaying content using every last pixel on the display. 2460 * 2461 * <p>There is a limitation: because navigation controls are so important, the least user 2462 * interaction will cause them to reappear immediately. When this happens, both 2463 * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, 2464 * so that both elements reappear at the same time. 2465 * 2466 * @see #setSystemUiVisibility(int) 2467 */ 2468 public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; 2469 2470 /** 2471 * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go 2472 * into the normal fullscreen mode so that its content can take over the screen 2473 * while still allowing the user to interact with the application. 2474 * 2475 * <p>This has the same visual effect as 2476 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN 2477 * WindowManager.LayoutParams.FLAG_FULLSCREEN}, 2478 * meaning that non-critical screen decorations (such as the status bar) will be 2479 * hidden while the user is in the View's window, focusing the experience on 2480 * that content. Unlike the window flag, if you are using ActionBar in 2481 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2482 * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also 2483 * hide the action bar. 2484 * 2485 * <p>This approach to going fullscreen is best used over the window flag when 2486 * it is a transient state -- that is, the application does this at certain 2487 * points in its user interaction where it wants to allow the user to focus 2488 * on content, but not as a continuous state. For situations where the application 2489 * would like to simply stay full screen the entire time (such as a game that 2490 * wants to take over the screen), the 2491 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} 2492 * is usually a better approach. The state set here will be removed by the system 2493 * in various situations (such as the user moving to another application) like 2494 * the other system UI states. 2495 * 2496 * <p>When using this flag, the application should provide some easy facility 2497 * for the user to go out of it. A common example would be in an e-book 2498 * reader, where tapping on the screen brings back whatever screen and UI 2499 * decorations that had been hidden while the user was immersed in reading 2500 * the book. 2501 * 2502 * @see #setSystemUiVisibility(int) 2503 */ 2504 public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; 2505 2506 /** 2507 * Flag for {@link #setSystemUiVisibility(int)}: When using other layout 2508 * flags, we would like a stable view of the content insets given to 2509 * {@link #fitSystemWindows(Rect)}. This means that the insets seen there 2510 * will always represent the worst case that the application can expect 2511 * as a continuous state. In the stock Android UI this is the space for 2512 * the system bar, nav bar, and status bar, but not more transient elements 2513 * such as an input method. 2514 * 2515 * The stable layout your UI sees is based on the system UI modes you can 2516 * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 2517 * then you will get a stable layout for changes of the 2518 * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify 2519 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and 2520 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition 2521 * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} 2522 * with a stable layout. (Note that you should avoid using 2523 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) 2524 * 2525 * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} 2526 * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), 2527 * then a hidden status bar will be considered a "stable" state for purposes 2528 * here. This allows your UI to continually hide the status bar, while still 2529 * using the system UI flags to hide the action bar while still retaining 2530 * a stable layout. Note that changing the window fullscreen flag will never 2531 * provide a stable layout for a clean transition. 2532 * 2533 * <p>If you are using ActionBar in 2534 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2535 * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the 2536 * insets it adds to those given to the application. 2537 */ 2538 public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; 2539 2540 /** 2541 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2542 * to be layed out as if it has requested 2543 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This 2544 * allows it to avoid artifacts when switching in and out of that mode, at 2545 * the expense that some of its user interface may be covered by screen 2546 * decorations when they are shown. You can perform layout of your inner 2547 * UI elements to account for the navigation system UI through the 2548 * {@link #fitSystemWindows(Rect)} method. 2549 */ 2550 public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; 2551 2552 /** 2553 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2554 * to be layed out as if it has requested 2555 * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This 2556 * allows it to avoid artifacts when switching in and out of that mode, at 2557 * the expense that some of its user interface may be covered by screen 2558 * decorations when they are shown. You can perform layout of your inner 2559 * UI elements to account for non-fullscreen system UI through the 2560 * {@link #fitSystemWindows(Rect)} method. 2561 */ 2562 public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; 2563 2564 /** 2565 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2566 * hiding the navigation bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. If this flag is 2567 * not set, {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any 2568 * user interaction. 2569 * <p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only 2570 * has an effect when used in combination with that flag.</p> 2571 */ 2572 public static final int SYSTEM_UI_FLAG_IMMERSIVE = 0x00000800; 2573 2574 /** 2575 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2576 * hiding the status bar with {@link #SYSTEM_UI_FLAG_FULLSCREEN} and/or hiding the navigation 2577 * bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. Use this flag to create an immersive 2578 * experience while also hiding the system bars. If this flag is not set, 2579 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any user 2580 * interaction, and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be force-cleared by the system 2581 * if the user swipes from the top of the screen. 2582 * <p>When system bars are hidden in immersive mode, they can be revealed temporarily with 2583 * system gestures, such as swiping from the top of the screen. These transient system bars 2584 * will overlay app’s content, may have some degree of transparency, and will automatically 2585 * hide after a short timeout. 2586 * </p><p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_FULLSCREEN} and 2587 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only has an effect when used in combination 2588 * with one or both of those flags.</p> 2589 */ 2590 public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000; 2591 2592 /** 2593 * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. 2594 */ 2595 public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; 2596 2597 /** 2598 * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. 2599 */ 2600 public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; 2601 2602 /** 2603 * @hide 2604 * 2605 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2606 * out of the public fields to keep the undefined bits out of the developer's way. 2607 * 2608 * Flag to make the status bar not expandable. Unless you also 2609 * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. 2610 */ 2611 public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; 2612 2613 /** 2614 * @hide 2615 * 2616 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2617 * out of the public fields to keep the undefined bits out of the developer's way. 2618 * 2619 * Flag to hide notification icons and scrolling ticker text. 2620 */ 2621 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; 2622 2623 /** 2624 * @hide 2625 * 2626 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2627 * out of the public fields to keep the undefined bits out of the developer's way. 2628 * 2629 * Flag to disable incoming notification alerts. This will not block 2630 * icons, but it will block sound, vibrating and other visual or aural notifications. 2631 */ 2632 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; 2633 2634 /** 2635 * @hide 2636 * 2637 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2638 * out of the public fields to keep the undefined bits out of the developer's way. 2639 * 2640 * Flag to hide only the scrolling ticker. Note that 2641 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies 2642 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. 2643 */ 2644 public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; 2645 2646 /** 2647 * @hide 2648 * 2649 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2650 * out of the public fields to keep the undefined bits out of the developer's way. 2651 * 2652 * Flag to hide the center system info area. 2653 */ 2654 public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; 2655 2656 /** 2657 * @hide 2658 * 2659 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2660 * out of the public fields to keep the undefined bits out of the developer's way. 2661 * 2662 * Flag to hide only the home button. Don't use this 2663 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2664 */ 2665 public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; 2666 2667 /** 2668 * @hide 2669 * 2670 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2671 * out of the public fields to keep the undefined bits out of the developer's way. 2672 * 2673 * Flag to hide only the back button. Don't use this 2674 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2675 */ 2676 public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; 2677 2678 /** 2679 * @hide 2680 * 2681 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2682 * out of the public fields to keep the undefined bits out of the developer's way. 2683 * 2684 * Flag to hide only the clock. You might use this if your activity has 2685 * its own clock making the status bar's clock redundant. 2686 */ 2687 public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; 2688 2689 /** 2690 * @hide 2691 * 2692 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2693 * out of the public fields to keep the undefined bits out of the developer's way. 2694 * 2695 * Flag to hide only the recent apps button. Don't use this 2696 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2697 */ 2698 public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; 2699 2700 /** 2701 * @hide 2702 * 2703 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2704 * out of the public fields to keep the undefined bits out of the developer's way. 2705 * 2706 * Flag to disable the global search gesture. Don't use this 2707 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2708 */ 2709 public static final int STATUS_BAR_DISABLE_SEARCH = 0x02000000; 2710 2711 /** 2712 * @hide 2713 * 2714 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2715 * out of the public fields to keep the undefined bits out of the developer's way. 2716 * 2717 * Flag to specify that the status bar is displayed in transient mode. 2718 */ 2719 public static final int STATUS_BAR_TRANSIENT = 0x04000000; 2720 2721 /** 2722 * @hide 2723 * 2724 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2725 * out of the public fields to keep the undefined bits out of the developer's way. 2726 * 2727 * Flag to specify that the navigation bar is displayed in transient mode. 2728 */ 2729 public static final int NAVIGATION_BAR_TRANSIENT = 0x08000000; 2730 2731 /** 2732 * @hide 2733 * 2734 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2735 * out of the public fields to keep the undefined bits out of the developer's way. 2736 * 2737 * Flag to specify that the hidden status bar would like to be shown. 2738 */ 2739 public static final int STATUS_BAR_UNHIDE = 0x10000000; 2740 2741 /** 2742 * @hide 2743 * 2744 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2745 * out of the public fields to keep the undefined bits out of the developer's way. 2746 * 2747 * Flag to specify that the hidden navigation bar would like to be shown. 2748 */ 2749 public static final int NAVIGATION_BAR_UNHIDE = 0x20000000; 2750 2751 /** 2752 * @hide 2753 * 2754 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2755 * out of the public fields to keep the undefined bits out of the developer's way. 2756 * 2757 * Flag to specify that the status bar is displayed in translucent mode. 2758 */ 2759 public static final int STATUS_BAR_TRANSLUCENT = 0x40000000; 2760 2761 /** 2762 * @hide 2763 * 2764 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2765 * out of the public fields to keep the undefined bits out of the developer's way. 2766 * 2767 * Flag to specify that the navigation bar is displayed in translucent mode. 2768 */ 2769 public static final int NAVIGATION_BAR_TRANSLUCENT = 0x80000000; 2770 2771 /** 2772 * @hide 2773 * 2774 * Whether Recents is visible or not. 2775 */ 2776 public static final int RECENT_APPS_VISIBLE = 0x00004000; 2777 2778 /** 2779 * @hide 2780 * 2781 * Makes system ui transparent. 2782 */ 2783 public static final int SYSTEM_UI_TRANSPARENT = 0x00008000; 2784 2785 /** 2786 * @hide 2787 */ 2788 public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x00003FFF; 2789 2790 /** 2791 * These are the system UI flags that can be cleared by events outside 2792 * of an application. Currently this is just the ability to tap on the 2793 * screen while hiding the navigation bar to have it return. 2794 * @hide 2795 */ 2796 public static final int SYSTEM_UI_CLEARABLE_FLAGS = 2797 SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION 2798 | SYSTEM_UI_FLAG_FULLSCREEN; 2799 2800 /** 2801 * Flags that can impact the layout in relation to system UI. 2802 */ 2803 public static final int SYSTEM_UI_LAYOUT_FLAGS = 2804 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 2805 | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 2806 2807 /** @hide */ 2808 @IntDef(flag = true, 2809 value = { FIND_VIEWS_WITH_TEXT, FIND_VIEWS_WITH_CONTENT_DESCRIPTION }) 2810 @Retention(RetentionPolicy.SOURCE) 2811 public @interface FindViewFlags {} 2812 2813 /** 2814 * Find views that render the specified text. 2815 * 2816 * @see #findViewsWithText(ArrayList, CharSequence, int) 2817 */ 2818 public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; 2819 2820 /** 2821 * Find find views that contain the specified content description. 2822 * 2823 * @see #findViewsWithText(ArrayList, CharSequence, int) 2824 */ 2825 public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; 2826 2827 /** 2828 * Find views that contain {@link AccessibilityNodeProvider}. Such 2829 * a View is a root of virtual view hierarchy and may contain the searched 2830 * text. If this flag is set Views with providers are automatically 2831 * added and it is a responsibility of the client to call the APIs of 2832 * the provider to determine whether the virtual tree rooted at this View 2833 * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s 2834 * representing the virtual views with this text. 2835 * 2836 * @see #findViewsWithText(ArrayList, CharSequence, int) 2837 * 2838 * @hide 2839 */ 2840 public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; 2841 2842 /** 2843 * The undefined cursor position. 2844 * 2845 * @hide 2846 */ 2847 public static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; 2848 2849 /** 2850 * Indicates that the screen has changed state and is now off. 2851 * 2852 * @see #onScreenStateChanged(int) 2853 */ 2854 public static final int SCREEN_STATE_OFF = 0x0; 2855 2856 /** 2857 * Indicates that the screen has changed state and is now on. 2858 * 2859 * @see #onScreenStateChanged(int) 2860 */ 2861 public static final int SCREEN_STATE_ON = 0x1; 2862 2863 /** 2864 * Indicates no axis of view scrolling. 2865 */ 2866 public static final int SCROLL_AXIS_NONE = 0; 2867 2868 /** 2869 * Indicates scrolling along the horizontal axis. 2870 */ 2871 public static final int SCROLL_AXIS_HORIZONTAL = 1 << 0; 2872 2873 /** 2874 * Indicates scrolling along the vertical axis. 2875 */ 2876 public static final int SCROLL_AXIS_VERTICAL = 1 << 1; 2877 2878 /** 2879 * Controls the over-scroll mode for this view. 2880 * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, 2881 * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, 2882 * and {@link #OVER_SCROLL_NEVER}. 2883 */ 2884 private int mOverScrollMode; 2885 2886 /** 2887 * The parent this view is attached to. 2888 * {@hide} 2889 * 2890 * @see #getParent() 2891 */ 2892 protected ViewParent mParent; 2893 2894 /** 2895 * {@hide} 2896 */ 2897 AttachInfo mAttachInfo; 2898 2899 /** 2900 * {@hide} 2901 */ 2902 @ViewDebug.ExportedProperty(flagMapping = { 2903 @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, 2904 name = "FORCE_LAYOUT"), 2905 @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, 2906 name = "LAYOUT_REQUIRED"), 2907 @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, 2908 name = "DRAWING_CACHE_INVALID", outputIf = false), 2909 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), 2910 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), 2911 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), 2912 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") 2913 }, formatToHexString = true) 2914 int mPrivateFlags; 2915 int mPrivateFlags2; 2916 int mPrivateFlags3; 2917 2918 /** 2919 * This view's request for the visibility of the status bar. 2920 * @hide 2921 */ 2922 @ViewDebug.ExportedProperty(flagMapping = { 2923 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, 2924 equals = SYSTEM_UI_FLAG_LOW_PROFILE, 2925 name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), 2926 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 2927 equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 2928 name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), 2929 @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, 2930 equals = SYSTEM_UI_FLAG_VISIBLE, 2931 name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) 2932 }, formatToHexString = true) 2933 int mSystemUiVisibility; 2934 2935 /** 2936 * Reference count for transient state. 2937 * @see #setHasTransientState(boolean) 2938 */ 2939 int mTransientStateCount = 0; 2940 2941 /** 2942 * Count of how many windows this view has been attached to. 2943 */ 2944 int mWindowAttachCount; 2945 2946 /** 2947 * The layout parameters associated with this view and used by the parent 2948 * {@link android.view.ViewGroup} to determine how this view should be 2949 * laid out. 2950 * {@hide} 2951 */ 2952 protected ViewGroup.LayoutParams mLayoutParams; 2953 2954 /** 2955 * The view flags hold various views states. 2956 * {@hide} 2957 */ 2958 @ViewDebug.ExportedProperty(formatToHexString = true) 2959 int mViewFlags; 2960 2961 static class TransformationInfo { 2962 /** 2963 * The transform matrix for the View. This transform is calculated internally 2964 * based on the translation, rotation, and scale properties. 2965 * 2966 * Do *not* use this variable directly; instead call getMatrix(), which will 2967 * load the value from the View's RenderNode. 2968 */ 2969 private final Matrix mMatrix = new Matrix(); 2970 2971 /** 2972 * The inverse transform matrix for the View. This transform is calculated 2973 * internally based on the translation, rotation, and scale properties. 2974 * 2975 * Do *not* use this variable directly; instead call getInverseMatrix(), 2976 * which will load the value from the View's RenderNode. 2977 */ 2978 private Matrix mInverseMatrix; 2979 2980 /** 2981 * The opacity of the View. This is a value from 0 to 1, where 0 means 2982 * completely transparent and 1 means completely opaque. 2983 */ 2984 @ViewDebug.ExportedProperty 2985 float mAlpha = 1f; 2986 2987 /** 2988 * The opacity of the view as manipulated by the Fade transition. This is a hidden 2989 * property only used by transitions, which is composited with the other alpha 2990 * values to calculate the final visual alpha value. 2991 */ 2992 float mTransitionAlpha = 1f; 2993 } 2994 2995 TransformationInfo mTransformationInfo; 2996 2997 /** 2998 * Current clip bounds. to which all drawing of this view are constrained. 2999 */ 3000 Rect mClipBounds = null; 3001 3002 private boolean mLastIsOpaque; 3003 3004 /** 3005 * The distance in pixels from the left edge of this view's parent 3006 * to the left edge of this view. 3007 * {@hide} 3008 */ 3009 @ViewDebug.ExportedProperty(category = "layout") 3010 protected int mLeft; 3011 /** 3012 * The distance in pixels from the left edge of this view's parent 3013 * to the right edge of this view. 3014 * {@hide} 3015 */ 3016 @ViewDebug.ExportedProperty(category = "layout") 3017 protected int mRight; 3018 /** 3019 * The distance in pixels from the top edge of this view's parent 3020 * to the top edge of this view. 3021 * {@hide} 3022 */ 3023 @ViewDebug.ExportedProperty(category = "layout") 3024 protected int mTop; 3025 /** 3026 * The distance in pixels from the top edge of this view's parent 3027 * to the bottom edge of this view. 3028 * {@hide} 3029 */ 3030 @ViewDebug.ExportedProperty(category = "layout") 3031 protected int mBottom; 3032 3033 /** 3034 * The offset, in pixels, by which the content of this view is scrolled 3035 * horizontally. 3036 * {@hide} 3037 */ 3038 @ViewDebug.ExportedProperty(category = "scrolling") 3039 protected int mScrollX; 3040 /** 3041 * The offset, in pixels, by which the content of this view is scrolled 3042 * vertically. 3043 * {@hide} 3044 */ 3045 @ViewDebug.ExportedProperty(category = "scrolling") 3046 protected int mScrollY; 3047 3048 /** 3049 * The left padding in pixels, that is the distance in pixels between the 3050 * left edge of this view and the left edge of its content. 3051 * {@hide} 3052 */ 3053 @ViewDebug.ExportedProperty(category = "padding") 3054 protected int mPaddingLeft = 0; 3055 /** 3056 * The right padding in pixels, that is the distance in pixels between the 3057 * right edge of this view and the right edge of its content. 3058 * {@hide} 3059 */ 3060 @ViewDebug.ExportedProperty(category = "padding") 3061 protected int mPaddingRight = 0; 3062 /** 3063 * The top padding in pixels, that is the distance in pixels between the 3064 * top edge of this view and the top edge of its content. 3065 * {@hide} 3066 */ 3067 @ViewDebug.ExportedProperty(category = "padding") 3068 protected int mPaddingTop; 3069 /** 3070 * The bottom padding in pixels, that is the distance in pixels between the 3071 * bottom edge of this view and the bottom edge of its content. 3072 * {@hide} 3073 */ 3074 @ViewDebug.ExportedProperty(category = "padding") 3075 protected int mPaddingBottom; 3076 3077 /** 3078 * The layout insets in pixels, that is the distance in pixels between the 3079 * visible edges of this view its bounds. 3080 */ 3081 private Insets mLayoutInsets; 3082 3083 /** 3084 * Briefly describes the view and is primarily used for accessibility support. 3085 */ 3086 private CharSequence mContentDescription; 3087 3088 /** 3089 * Specifies the id of a view for which this view serves as a label for 3090 * accessibility purposes. 3091 */ 3092 private int mLabelForId = View.NO_ID; 3093 3094 /** 3095 * Predicate for matching labeled view id with its label for 3096 * accessibility purposes. 3097 */ 3098 private MatchLabelForPredicate mMatchLabelForPredicate; 3099 3100 /** 3101 * Predicate for matching a view by its id. 3102 */ 3103 private MatchIdPredicate mMatchIdPredicate; 3104 3105 /** 3106 * Cache the paddingRight set by the user to append to the scrollbar's size. 3107 * 3108 * @hide 3109 */ 3110 @ViewDebug.ExportedProperty(category = "padding") 3111 protected int mUserPaddingRight; 3112 3113 /** 3114 * Cache the paddingBottom set by the user to append to the scrollbar's size. 3115 * 3116 * @hide 3117 */ 3118 @ViewDebug.ExportedProperty(category = "padding") 3119 protected int mUserPaddingBottom; 3120 3121 /** 3122 * Cache the paddingLeft set by the user to append to the scrollbar's size. 3123 * 3124 * @hide 3125 */ 3126 @ViewDebug.ExportedProperty(category = "padding") 3127 protected int mUserPaddingLeft; 3128 3129 /** 3130 * Cache the paddingStart set by the user to append to the scrollbar's size. 3131 * 3132 */ 3133 @ViewDebug.ExportedProperty(category = "padding") 3134 int mUserPaddingStart; 3135 3136 /** 3137 * Cache the paddingEnd set by the user to append to the scrollbar's size. 3138 * 3139 */ 3140 @ViewDebug.ExportedProperty(category = "padding") 3141 int mUserPaddingEnd; 3142 3143 /** 3144 * Cache initial left padding. 3145 * 3146 * @hide 3147 */ 3148 int mUserPaddingLeftInitial; 3149 3150 /** 3151 * Cache initial right padding. 3152 * 3153 * @hide 3154 */ 3155 int mUserPaddingRightInitial; 3156 3157 /** 3158 * Default undefined padding 3159 */ 3160 private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; 3161 3162 /** 3163 * Cache if a left padding has been defined 3164 */ 3165 private boolean mLeftPaddingDefined = false; 3166 3167 /** 3168 * Cache if a right padding has been defined 3169 */ 3170 private boolean mRightPaddingDefined = false; 3171 3172 /** 3173 * @hide 3174 */ 3175 int mOldWidthMeasureSpec = Integer.MIN_VALUE; 3176 /** 3177 * @hide 3178 */ 3179 int mOldHeightMeasureSpec = Integer.MIN_VALUE; 3180 3181 private LongSparseLongArray mMeasureCache; 3182 3183 @ViewDebug.ExportedProperty(deepExport = true, prefix = "bg_") 3184 private Drawable mBackground; 3185 private ColorStateList mBackgroundTintList = null; 3186 private PorterDuff.Mode mBackgroundTintMode = PorterDuff.Mode.SRC_ATOP; 3187 private boolean mHasBackgroundTint = false; 3188 3189 /** 3190 * RenderNode used for backgrounds. 3191 * <p> 3192 * When non-null and valid, this is expected to contain an up-to-date copy 3193 * of the background drawable. It is cleared on temporary detach, and reset 3194 * on cleanup. 3195 */ 3196 private RenderNode mBackgroundRenderNode; 3197 3198 private int mBackgroundResource; 3199 private boolean mBackgroundSizeChanged; 3200 3201 private String mTransitionName; 3202 3203 static class ListenerInfo { 3204 /** 3205 * Listener used to dispatch focus change events. 3206 * This field should be made private, so it is hidden from the SDK. 3207 * {@hide} 3208 */ 3209 protected OnFocusChangeListener mOnFocusChangeListener; 3210 3211 /** 3212 * Listeners for layout change events. 3213 */ 3214 private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; 3215 3216 /** 3217 * Listeners for attach events. 3218 */ 3219 private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; 3220 3221 /** 3222 * Listener used to dispatch click events. 3223 * This field should be made private, so it is hidden from the SDK. 3224 * {@hide} 3225 */ 3226 public OnClickListener mOnClickListener; 3227 3228 /** 3229 * Listener used to dispatch long click events. 3230 * This field should be made private, so it is hidden from the SDK. 3231 * {@hide} 3232 */ 3233 protected OnLongClickListener mOnLongClickListener; 3234 3235 /** 3236 * Listener used to build the context menu. 3237 * This field should be made private, so it is hidden from the SDK. 3238 * {@hide} 3239 */ 3240 protected OnCreateContextMenuListener mOnCreateContextMenuListener; 3241 3242 private OnKeyListener mOnKeyListener; 3243 3244 private OnTouchListener mOnTouchListener; 3245 3246 private OnHoverListener mOnHoverListener; 3247 3248 private OnGenericMotionListener mOnGenericMotionListener; 3249 3250 private OnDragListener mOnDragListener; 3251 3252 private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; 3253 3254 OnApplyWindowInsetsListener mOnApplyWindowInsetsListener; 3255 } 3256 3257 ListenerInfo mListenerInfo; 3258 3259 /** 3260 * The application environment this view lives in. 3261 * This field should be made private, so it is hidden from the SDK. 3262 * {@hide} 3263 */ 3264 @ViewDebug.ExportedProperty(deepExport = true) 3265 protected Context mContext; 3266 3267 private final Resources mResources; 3268 3269 private ScrollabilityCache mScrollCache; 3270 3271 private int[] mDrawableState = null; 3272 3273 ViewOutlineProvider mOutlineProvider = ViewOutlineProvider.BACKGROUND; 3274 3275 /** 3276 * Animator that automatically runs based on state changes. 3277 */ 3278 private StateListAnimator mStateListAnimator; 3279 3280 /** 3281 * When this view has focus and the next focus is {@link #FOCUS_LEFT}, 3282 * the user may specify which view to go to next. 3283 */ 3284 private int mNextFocusLeftId = View.NO_ID; 3285 3286 /** 3287 * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, 3288 * the user may specify which view to go to next. 3289 */ 3290 private int mNextFocusRightId = View.NO_ID; 3291 3292 /** 3293 * When this view has focus and the next focus is {@link #FOCUS_UP}, 3294 * the user may specify which view to go to next. 3295 */ 3296 private int mNextFocusUpId = View.NO_ID; 3297 3298 /** 3299 * When this view has focus and the next focus is {@link #FOCUS_DOWN}, 3300 * the user may specify which view to go to next. 3301 */ 3302 private int mNextFocusDownId = View.NO_ID; 3303 3304 /** 3305 * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, 3306 * the user may specify which view to go to next. 3307 */ 3308 int mNextFocusForwardId = View.NO_ID; 3309 3310 private CheckForLongPress mPendingCheckForLongPress; 3311 private CheckForTap mPendingCheckForTap = null; 3312 private PerformClick mPerformClick; 3313 private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; 3314 3315 private UnsetPressedState mUnsetPressedState; 3316 3317 /** 3318 * Whether the long press's action has been invoked. The tap's action is invoked on the 3319 * up event while a long press is invoked as soon as the long press duration is reached, so 3320 * a long press could be performed before the tap is checked, in which case the tap's action 3321 * should not be invoked. 3322 */ 3323 private boolean mHasPerformedLongPress; 3324 3325 /** 3326 * The minimum height of the view. We'll try our best to have the height 3327 * of this view to at least this amount. 3328 */ 3329 @ViewDebug.ExportedProperty(category = "measurement") 3330 private int mMinHeight; 3331 3332 /** 3333 * The minimum width of the view. We'll try our best to have the width 3334 * of this view to at least this amount. 3335 */ 3336 @ViewDebug.ExportedProperty(category = "measurement") 3337 private int mMinWidth; 3338 3339 /** 3340 * The delegate to handle touch events that are physically in this view 3341 * but should be handled by another view. 3342 */ 3343 private TouchDelegate mTouchDelegate = null; 3344 3345 /** 3346 * Solid color to use as a background when creating the drawing cache. Enables 3347 * the cache to use 16 bit bitmaps instead of 32 bit. 3348 */ 3349 private int mDrawingCacheBackgroundColor = 0; 3350 3351 /** 3352 * Special tree observer used when mAttachInfo is null. 3353 */ 3354 private ViewTreeObserver mFloatingTreeObserver; 3355 3356 /** 3357 * Cache the touch slop from the context that created the view. 3358 */ 3359 private int mTouchSlop; 3360 3361 /** 3362 * Object that handles automatic animation of view properties. 3363 */ 3364 private ViewPropertyAnimator mAnimator = null; 3365 3366 /** 3367 * Flag indicating that a drag can cross window boundaries. When 3368 * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called 3369 * with this flag set, all visible applications will be able to participate 3370 * in the drag operation and receive the dragged content. 3371 * 3372 * @hide 3373 */ 3374 public static final int DRAG_FLAG_GLOBAL = 1; 3375 3376 /** 3377 * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. 3378 */ 3379 private float mVerticalScrollFactor; 3380 3381 /** 3382 * Position of the vertical scroll bar. 3383 */ 3384 private int mVerticalScrollbarPosition; 3385 3386 /** 3387 * Position the scroll bar at the default position as determined by the system. 3388 */ 3389 public static final int SCROLLBAR_POSITION_DEFAULT = 0; 3390 3391 /** 3392 * Position the scroll bar along the left edge. 3393 */ 3394 public static final int SCROLLBAR_POSITION_LEFT = 1; 3395 3396 /** 3397 * Position the scroll bar along the right edge. 3398 */ 3399 public static final int SCROLLBAR_POSITION_RIGHT = 2; 3400 3401 /** 3402 * Indicates that the view does not have a layer. 3403 * 3404 * @see #getLayerType() 3405 * @see #setLayerType(int, android.graphics.Paint) 3406 * @see #LAYER_TYPE_SOFTWARE 3407 * @see #LAYER_TYPE_HARDWARE 3408 */ 3409 public static final int LAYER_TYPE_NONE = 0; 3410 3411 /** 3412 * <p>Indicates that the view has a software layer. A software layer is backed 3413 * by a bitmap and causes the view to be rendered using Android's software 3414 * rendering pipeline, even if hardware acceleration is enabled.</p> 3415 * 3416 * <p>Software layers have various usages:</p> 3417 * <p>When the application is not using hardware acceleration, a software layer 3418 * is useful to apply a specific color filter and/or blending mode and/or 3419 * translucency to a view and all its children.</p> 3420 * <p>When the application is using hardware acceleration, a software layer 3421 * is useful to render drawing primitives not supported by the hardware 3422 * accelerated pipeline. It can also be used to cache a complex view tree 3423 * into a texture and reduce the complexity of drawing operations. For instance, 3424 * when animating a complex view tree with a translation, a software layer can 3425 * be used to render the view tree only once.</p> 3426 * <p>Software layers should be avoided when the affected view tree updates 3427 * often. Every update will require to re-render the software layer, which can 3428 * potentially be slow (particularly when hardware acceleration is turned on 3429 * since the layer will have to be uploaded into a hardware texture after every 3430 * update.)</p> 3431 * 3432 * @see #getLayerType() 3433 * @see #setLayerType(int, android.graphics.Paint) 3434 * @see #LAYER_TYPE_NONE 3435 * @see #LAYER_TYPE_HARDWARE 3436 */ 3437 public static final int LAYER_TYPE_SOFTWARE = 1; 3438 3439 /** 3440 * <p>Indicates that the view has a hardware layer. A hardware layer is backed 3441 * by a hardware specific texture (generally Frame Buffer Objects or FBO on 3442 * OpenGL hardware) and causes the view to be rendered using Android's hardware 3443 * rendering pipeline, but only if hardware acceleration is turned on for the 3444 * view hierarchy. When hardware acceleration is turned off, hardware layers 3445 * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> 3446 * 3447 * <p>A hardware layer is useful to apply a specific color filter and/or 3448 * blending mode and/or translucency to a view and all its children.</p> 3449 * <p>A hardware layer can be used to cache a complex view tree into a 3450 * texture and reduce the complexity of drawing operations. For instance, 3451 * when animating a complex view tree with a translation, a hardware layer can 3452 * be used to render the view tree only once.</p> 3453 * <p>A hardware layer can also be used to increase the rendering quality when 3454 * rotation transformations are applied on a view. It can also be used to 3455 * prevent potential clipping issues when applying 3D transforms on a view.</p> 3456 * 3457 * @see #getLayerType() 3458 * @see #setLayerType(int, android.graphics.Paint) 3459 * @see #LAYER_TYPE_NONE 3460 * @see #LAYER_TYPE_SOFTWARE 3461 */ 3462 public static final int LAYER_TYPE_HARDWARE = 2; 3463 3464 @ViewDebug.ExportedProperty(category = "drawing", mapping = { 3465 @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), 3466 @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), 3467 @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") 3468 }) 3469 int mLayerType = LAYER_TYPE_NONE; 3470 Paint mLayerPaint; 3471 3472 /** 3473 * Set to true when drawing cache is enabled and cannot be created. 3474 * 3475 * @hide 3476 */ 3477 public boolean mCachingFailed; 3478 private Bitmap mDrawingCache; 3479 private Bitmap mUnscaledDrawingCache; 3480 3481 /** 3482 * RenderNode holding View properties, potentially holding a DisplayList of View content. 3483 * <p> 3484 * When non-null and valid, this is expected to contain an up-to-date copy 3485 * of the View content. Its DisplayList content is cleared on temporary detach and reset on 3486 * cleanup. 3487 */ 3488 final RenderNode mRenderNode; 3489 3490 /** 3491 * Set to true when the view is sending hover accessibility events because it 3492 * is the innermost hovered view. 3493 */ 3494 private boolean mSendingHoverAccessibilityEvents; 3495 3496 /** 3497 * Delegate for injecting accessibility functionality. 3498 */ 3499 AccessibilityDelegate mAccessibilityDelegate; 3500 3501 /** 3502 * The view's overlay layer. Developers get a reference to the overlay via getOverlay() 3503 * and add/remove objects to/from the overlay directly through the Overlay methods. 3504 */ 3505 ViewOverlay mOverlay; 3506 3507 /** 3508 * The currently active parent view for receiving delegated nested scrolling events. 3509 * This is set by {@link #startNestedScroll(int)} during a touch interaction and cleared 3510 * by {@link #stopNestedScroll()} at the same point where we clear 3511 * requestDisallowInterceptTouchEvent. 3512 */ 3513 private ViewParent mNestedScrollingParent; 3514 3515 /** 3516 * Consistency verifier for debugging purposes. 3517 * @hide 3518 */ 3519 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 3520 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 3521 new InputEventConsistencyVerifier(this, 0) : null; 3522 3523 private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); 3524 3525 private int[] mTempNestedScrollConsumed; 3526 3527 /** 3528 * An overlay is going to draw this View instead of being drawn as part of this 3529 * View's parent. mGhostView is the View in the Overlay that must be invalidated 3530 * when this view is invalidated. 3531 */ 3532 GhostView mGhostView; 3533 3534 /** 3535 * Holds pairs of adjacent attribute data: attribute name followed by its value. 3536 * @hide 3537 */ 3538 @ViewDebug.ExportedProperty(category = "attributes", hasAdjacentMapping = true) 3539 public String[] mAttributes; 3540 3541 /** 3542 * Maps a Resource id to its name. 3543 */ 3544 private static SparseArray<String> mAttributeMap; 3545 3546 /** 3547 * Simple constructor to use when creating a view from code. 3548 * 3549 * @param context The Context the view is running in, through which it can 3550 * access the current theme, resources, etc. 3551 */ 3552 public View(Context context) { 3553 mContext = context; 3554 mResources = context != null ? context.getResources() : null; 3555 mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; 3556 // Set some flags defaults 3557 mPrivateFlags2 = 3558 (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | 3559 (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | 3560 (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | 3561 (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | 3562 (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | 3563 (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); 3564 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 3565 setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); 3566 mUserPaddingStart = UNDEFINED_PADDING; 3567 mUserPaddingEnd = UNDEFINED_PADDING; 3568 mRenderNode = RenderNode.create(getClass().getName()); 3569 3570 if (!sCompatibilityDone && context != null) { 3571 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3572 3573 // Older apps may need this compatibility hack for measurement. 3574 sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1; 3575 3576 // Older apps expect onMeasure() to always be called on a layout pass, regardless 3577 // of whether a layout was requested on that View. 3578 sIgnoreMeasureCache = targetSdkVersion < KITKAT; 3579 3580 sCompatibilityDone = true; 3581 } 3582 } 3583 3584 /** 3585 * Constructor that is called when inflating a view from XML. This is called 3586 * when a view is being constructed from an XML file, supplying attributes 3587 * that were specified in the XML file. This version uses a default style of 3588 * 0, so the only attribute values applied are those in the Context's Theme 3589 * and the given AttributeSet. 3590 * 3591 * <p> 3592 * The method onFinishInflate() will be called after all children have been 3593 * added. 3594 * 3595 * @param context The Context the view is running in, through which it can 3596 * access the current theme, resources, etc. 3597 * @param attrs The attributes of the XML tag that is inflating the view. 3598 * @see #View(Context, AttributeSet, int) 3599 */ 3600 public View(Context context, AttributeSet attrs) { 3601 this(context, attrs, 0); 3602 } 3603 3604 /** 3605 * Perform inflation from XML and apply a class-specific base style from a 3606 * theme attribute. This constructor of View allows subclasses to use their 3607 * own base style when they are inflating. For example, a Button class's 3608 * constructor would call this version of the super class constructor and 3609 * supply <code>R.attr.buttonStyle</code> for <var>defStyleAttr</var>; this 3610 * allows the theme's button style to modify all of the base view attributes 3611 * (in particular its background) as well as the Button class's attributes. 3612 * 3613 * @param context The Context the view is running in, through which it can 3614 * access the current theme, resources, etc. 3615 * @param attrs The attributes of the XML tag that is inflating the view. 3616 * @param defStyleAttr An attribute in the current theme that contains a 3617 * reference to a style resource that supplies default values for 3618 * the view. Can be 0 to not look for defaults. 3619 * @see #View(Context, AttributeSet) 3620 */ 3621 public View(Context context, AttributeSet attrs, int defStyleAttr) { 3622 this(context, attrs, defStyleAttr, 0); 3623 } 3624 3625 /** 3626 * Perform inflation from XML and apply a class-specific base style from a 3627 * theme attribute or style resource. This constructor of View allows 3628 * subclasses to use their own base style when they are inflating. 3629 * <p> 3630 * When determining the final value of a particular attribute, there are 3631 * four inputs that come into play: 3632 * <ol> 3633 * <li>Any attribute values in the given AttributeSet. 3634 * <li>The style resource specified in the AttributeSet (named "style"). 3635 * <li>The default style specified by <var>defStyleAttr</var>. 3636 * <li>The default style specified by <var>defStyleRes</var>. 3637 * <li>The base values in this theme. 3638 * </ol> 3639 * <p> 3640 * Each of these inputs is considered in-order, with the first listed taking 3641 * precedence over the following ones. In other words, if in the 3642 * AttributeSet you have supplied <code><Button * textColor="#ff000000"></code> 3643 * , then the button's text will <em>always</em> be black, regardless of 3644 * what is specified in any of the styles. 3645 * 3646 * @param context The Context the view is running in, through which it can 3647 * access the current theme, resources, etc. 3648 * @param attrs The attributes of the XML tag that is inflating the view. 3649 * @param defStyleAttr An attribute in the current theme that contains a 3650 * reference to a style resource that supplies default values for 3651 * the view. Can be 0 to not look for defaults. 3652 * @param defStyleRes A resource identifier of a style resource that 3653 * supplies default values for the view, used only if 3654 * defStyleAttr is 0 or can not be found in the theme. Can be 0 3655 * to not look for defaults. 3656 * @see #View(Context, AttributeSet, int) 3657 */ 3658 public View(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 3659 this(context); 3660 3661 final TypedArray a = context.obtainStyledAttributes( 3662 attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes); 3663 3664 if (mDebugViewAttributes) { 3665 saveAttributeData(attrs, a); 3666 } 3667 3668 Drawable background = null; 3669 3670 int leftPadding = -1; 3671 int topPadding = -1; 3672 int rightPadding = -1; 3673 int bottomPadding = -1; 3674 int startPadding = UNDEFINED_PADDING; 3675 int endPadding = UNDEFINED_PADDING; 3676 3677 int padding = -1; 3678 3679 int viewFlagValues = 0; 3680 int viewFlagMasks = 0; 3681 3682 boolean setScrollContainer = false; 3683 3684 int x = 0; 3685 int y = 0; 3686 3687 float tx = 0; 3688 float ty = 0; 3689 float tz = 0; 3690 float elevation = 0; 3691 float rotation = 0; 3692 float rotationX = 0; 3693 float rotationY = 0; 3694 float sx = 1f; 3695 float sy = 1f; 3696 boolean transformSet = false; 3697 3698 int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; 3699 int overScrollMode = mOverScrollMode; 3700 boolean initializeScrollbars = false; 3701 3702 boolean startPaddingDefined = false; 3703 boolean endPaddingDefined = false; 3704 boolean leftPaddingDefined = false; 3705 boolean rightPaddingDefined = false; 3706 3707 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3708 3709 final int N = a.getIndexCount(); 3710 for (int i = 0; i < N; i++) { 3711 int attr = a.getIndex(i); 3712 switch (attr) { 3713 case com.android.internal.R.styleable.View_background: 3714 background = a.getDrawable(attr); 3715 break; 3716 case com.android.internal.R.styleable.View_padding: 3717 padding = a.getDimensionPixelSize(attr, -1); 3718 mUserPaddingLeftInitial = padding; 3719 mUserPaddingRightInitial = padding; 3720 leftPaddingDefined = true; 3721 rightPaddingDefined = true; 3722 break; 3723 case com.android.internal.R.styleable.View_paddingLeft: 3724 leftPadding = a.getDimensionPixelSize(attr, -1); 3725 mUserPaddingLeftInitial = leftPadding; 3726 leftPaddingDefined = true; 3727 break; 3728 case com.android.internal.R.styleable.View_paddingTop: 3729 topPadding = a.getDimensionPixelSize(attr, -1); 3730 break; 3731 case com.android.internal.R.styleable.View_paddingRight: 3732 rightPadding = a.getDimensionPixelSize(attr, -1); 3733 mUserPaddingRightInitial = rightPadding; 3734 rightPaddingDefined = true; 3735 break; 3736 case com.android.internal.R.styleable.View_paddingBottom: 3737 bottomPadding = a.getDimensionPixelSize(attr, -1); 3738 break; 3739 case com.android.internal.R.styleable.View_paddingStart: 3740 startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3741 startPaddingDefined = (startPadding != UNDEFINED_PADDING); 3742 break; 3743 case com.android.internal.R.styleable.View_paddingEnd: 3744 endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3745 endPaddingDefined = (endPadding != UNDEFINED_PADDING); 3746 break; 3747 case com.android.internal.R.styleable.View_scrollX: 3748 x = a.getDimensionPixelOffset(attr, 0); 3749 break; 3750 case com.android.internal.R.styleable.View_scrollY: 3751 y = a.getDimensionPixelOffset(attr, 0); 3752 break; 3753 case com.android.internal.R.styleable.View_alpha: 3754 setAlpha(a.getFloat(attr, 1f)); 3755 break; 3756 case com.android.internal.R.styleable.View_transformPivotX: 3757 setPivotX(a.getDimensionPixelOffset(attr, 0)); 3758 break; 3759 case com.android.internal.R.styleable.View_transformPivotY: 3760 setPivotY(a.getDimensionPixelOffset(attr, 0)); 3761 break; 3762 case com.android.internal.R.styleable.View_translationX: 3763 tx = a.getDimensionPixelOffset(attr, 0); 3764 transformSet = true; 3765 break; 3766 case com.android.internal.R.styleable.View_translationY: 3767 ty = a.getDimensionPixelOffset(attr, 0); 3768 transformSet = true; 3769 break; 3770 case com.android.internal.R.styleable.View_translationZ: 3771 tz = a.getDimensionPixelOffset(attr, 0); 3772 transformSet = true; 3773 break; 3774 case com.android.internal.R.styleable.View_elevation: 3775 elevation = a.getDimensionPixelOffset(attr, 0); 3776 transformSet = true; 3777 break; 3778 case com.android.internal.R.styleable.View_rotation: 3779 rotation = a.getFloat(attr, 0); 3780 transformSet = true; 3781 break; 3782 case com.android.internal.R.styleable.View_rotationX: 3783 rotationX = a.getFloat(attr, 0); 3784 transformSet = true; 3785 break; 3786 case com.android.internal.R.styleable.View_rotationY: 3787 rotationY = a.getFloat(attr, 0); 3788 transformSet = true; 3789 break; 3790 case com.android.internal.R.styleable.View_scaleX: 3791 sx = a.getFloat(attr, 1f); 3792 transformSet = true; 3793 break; 3794 case com.android.internal.R.styleable.View_scaleY: 3795 sy = a.getFloat(attr, 1f); 3796 transformSet = true; 3797 break; 3798 case com.android.internal.R.styleable.View_id: 3799 mID = a.getResourceId(attr, NO_ID); 3800 break; 3801 case com.android.internal.R.styleable.View_tag: 3802 mTag = a.getText(attr); 3803 break; 3804 case com.android.internal.R.styleable.View_fitsSystemWindows: 3805 if (a.getBoolean(attr, false)) { 3806 viewFlagValues |= FITS_SYSTEM_WINDOWS; 3807 viewFlagMasks |= FITS_SYSTEM_WINDOWS; 3808 } 3809 break; 3810 case com.android.internal.R.styleable.View_focusable: 3811 if (a.getBoolean(attr, false)) { 3812 viewFlagValues |= FOCUSABLE; 3813 viewFlagMasks |= FOCUSABLE_MASK; 3814 } 3815 break; 3816 case com.android.internal.R.styleable.View_focusableInTouchMode: 3817 if (a.getBoolean(attr, false)) { 3818 viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; 3819 viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; 3820 } 3821 break; 3822 case com.android.internal.R.styleable.View_clickable: 3823 if (a.getBoolean(attr, false)) { 3824 viewFlagValues |= CLICKABLE; 3825 viewFlagMasks |= CLICKABLE; 3826 } 3827 break; 3828 case com.android.internal.R.styleable.View_longClickable: 3829 if (a.getBoolean(attr, false)) { 3830 viewFlagValues |= LONG_CLICKABLE; 3831 viewFlagMasks |= LONG_CLICKABLE; 3832 } 3833 break; 3834 case com.android.internal.R.styleable.View_saveEnabled: 3835 if (!a.getBoolean(attr, true)) { 3836 viewFlagValues |= SAVE_DISABLED; 3837 viewFlagMasks |= SAVE_DISABLED_MASK; 3838 } 3839 break; 3840 case com.android.internal.R.styleable.View_duplicateParentState: 3841 if (a.getBoolean(attr, false)) { 3842 viewFlagValues |= DUPLICATE_PARENT_STATE; 3843 viewFlagMasks |= DUPLICATE_PARENT_STATE; 3844 } 3845 break; 3846 case com.android.internal.R.styleable.View_visibility: 3847 final int visibility = a.getInt(attr, 0); 3848 if (visibility != 0) { 3849 viewFlagValues |= VISIBILITY_FLAGS[visibility]; 3850 viewFlagMasks |= VISIBILITY_MASK; 3851 } 3852 break; 3853 case com.android.internal.R.styleable.View_layoutDirection: 3854 // Clear any layout direction flags (included resolved bits) already set 3855 mPrivateFlags2 &= 3856 ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); 3857 // Set the layout direction flags depending on the value of the attribute 3858 final int layoutDirection = a.getInt(attr, -1); 3859 final int value = (layoutDirection != -1) ? 3860 LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; 3861 mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); 3862 break; 3863 case com.android.internal.R.styleable.View_drawingCacheQuality: 3864 final int cacheQuality = a.getInt(attr, 0); 3865 if (cacheQuality != 0) { 3866 viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; 3867 viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; 3868 } 3869 break; 3870 case com.android.internal.R.styleable.View_contentDescription: 3871 setContentDescription(a.getString(attr)); 3872 break; 3873 case com.android.internal.R.styleable.View_labelFor: 3874 setLabelFor(a.getResourceId(attr, NO_ID)); 3875 break; 3876 case com.android.internal.R.styleable.View_soundEffectsEnabled: 3877 if (!a.getBoolean(attr, true)) { 3878 viewFlagValues &= ~SOUND_EFFECTS_ENABLED; 3879 viewFlagMasks |= SOUND_EFFECTS_ENABLED; 3880 } 3881 break; 3882 case com.android.internal.R.styleable.View_hapticFeedbackEnabled: 3883 if (!a.getBoolean(attr, true)) { 3884 viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; 3885 viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; 3886 } 3887 break; 3888 case R.styleable.View_scrollbars: 3889 final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); 3890 if (scrollbars != SCROLLBARS_NONE) { 3891 viewFlagValues |= scrollbars; 3892 viewFlagMasks |= SCROLLBARS_MASK; 3893 initializeScrollbars = true; 3894 } 3895 break; 3896 //noinspection deprecation 3897 case R.styleable.View_fadingEdge: 3898 if (targetSdkVersion >= ICE_CREAM_SANDWICH) { 3899 // Ignore the attribute starting with ICS 3900 break; 3901 } 3902 // With builds < ICS, fall through and apply fading edges 3903 case R.styleable.View_requiresFadingEdge: 3904 final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); 3905 if (fadingEdge != FADING_EDGE_NONE) { 3906 viewFlagValues |= fadingEdge; 3907 viewFlagMasks |= FADING_EDGE_MASK; 3908 initializeFadingEdgeInternal(a); 3909 } 3910 break; 3911 case R.styleable.View_scrollbarStyle: 3912 scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); 3913 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 3914 viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; 3915 viewFlagMasks |= SCROLLBARS_STYLE_MASK; 3916 } 3917 break; 3918 case R.styleable.View_isScrollContainer: 3919 setScrollContainer = true; 3920 if (a.getBoolean(attr, false)) { 3921 setScrollContainer(true); 3922 } 3923 break; 3924 case com.android.internal.R.styleable.View_keepScreenOn: 3925 if (a.getBoolean(attr, false)) { 3926 viewFlagValues |= KEEP_SCREEN_ON; 3927 viewFlagMasks |= KEEP_SCREEN_ON; 3928 } 3929 break; 3930 case R.styleable.View_filterTouchesWhenObscured: 3931 if (a.getBoolean(attr, false)) { 3932 viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; 3933 viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; 3934 } 3935 break; 3936 case R.styleable.View_nextFocusLeft: 3937 mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); 3938 break; 3939 case R.styleable.View_nextFocusRight: 3940 mNextFocusRightId = a.getResourceId(attr, View.NO_ID); 3941 break; 3942 case R.styleable.View_nextFocusUp: 3943 mNextFocusUpId = a.getResourceId(attr, View.NO_ID); 3944 break; 3945 case R.styleable.View_nextFocusDown: 3946 mNextFocusDownId = a.getResourceId(attr, View.NO_ID); 3947 break; 3948 case R.styleable.View_nextFocusForward: 3949 mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); 3950 break; 3951 case R.styleable.View_minWidth: 3952 mMinWidth = a.getDimensionPixelSize(attr, 0); 3953 break; 3954 case R.styleable.View_minHeight: 3955 mMinHeight = a.getDimensionPixelSize(attr, 0); 3956 break; 3957 case R.styleable.View_onClick: 3958 if (context.isRestricted()) { 3959 throw new IllegalStateException("The android:onClick attribute cannot " 3960 + "be used within a restricted context"); 3961 } 3962 3963 final String handlerName = a.getString(attr); 3964 if (handlerName != null) { 3965 setOnClickListener(new OnClickListener() { 3966 private Method mHandler; 3967 3968 public void onClick(View v) { 3969 if (mHandler == null) { 3970 try { 3971 mHandler = getContext().getClass().getMethod(handlerName, 3972 View.class); 3973 } catch (NoSuchMethodException e) { 3974 int id = getId(); 3975 String idText = id == NO_ID ? "" : " with id '" 3976 + getContext().getResources().getResourceEntryName( 3977 id) + "'"; 3978 throw new IllegalStateException("Could not find a method " + 3979 handlerName + "(View) in the activity " 3980 + getContext().getClass() + " for onClick handler" 3981 + " on view " + View.this.getClass() + idText, e); 3982 } 3983 } 3984 3985 try { 3986 mHandler.invoke(getContext(), View.this); 3987 } catch (IllegalAccessException e) { 3988 throw new IllegalStateException("Could not execute non " 3989 + "public method of the activity", e); 3990 } catch (InvocationTargetException e) { 3991 throw new IllegalStateException("Could not execute " 3992 + "method of the activity", e); 3993 } 3994 } 3995 }); 3996 } 3997 break; 3998 case R.styleable.View_overScrollMode: 3999 overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); 4000 break; 4001 case R.styleable.View_verticalScrollbarPosition: 4002 mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); 4003 break; 4004 case R.styleable.View_layerType: 4005 setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); 4006 break; 4007 case R.styleable.View_textDirection: 4008 // Clear any text direction flag already set 4009 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 4010 // Set the text direction flags depending on the value of the attribute 4011 final int textDirection = a.getInt(attr, -1); 4012 if (textDirection != -1) { 4013 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; 4014 } 4015 break; 4016 case R.styleable.View_textAlignment: 4017 // Clear any text alignment flag already set 4018 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 4019 // Set the text alignment flag depending on the value of the attribute 4020 final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); 4021 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; 4022 break; 4023 case R.styleable.View_importantForAccessibility: 4024 setImportantForAccessibility(a.getInt(attr, 4025 IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); 4026 break; 4027 case R.styleable.View_accessibilityLiveRegion: 4028 setAccessibilityLiveRegion(a.getInt(attr, ACCESSIBILITY_LIVE_REGION_DEFAULT)); 4029 break; 4030 case R.styleable.View_transitionName: 4031 setTransitionName(a.getString(attr)); 4032 break; 4033 case R.styleable.View_nestedScrollingEnabled: 4034 setNestedScrollingEnabled(a.getBoolean(attr, false)); 4035 break; 4036 case R.styleable.View_stateListAnimator: 4037 setStateListAnimator(AnimatorInflater.loadStateListAnimator(context, 4038 a.getResourceId(attr, 0))); 4039 break; 4040 case R.styleable.View_backgroundTint: 4041 // This will get applied later during setBackground(). 4042 mBackgroundTintList = a.getColorStateList(R.styleable.View_backgroundTint); 4043 mHasBackgroundTint = true; 4044 break; 4045 case R.styleable.View_backgroundTintMode: 4046 // This will get applied later during setBackground(). 4047 mBackgroundTintMode = Drawable.parseTintMode(a.getInt( 4048 R.styleable.View_backgroundTintMode, -1), mBackgroundTintMode); 4049 break; 4050 case R.styleable.View_outlineProvider: 4051 setOutlineProviderFromAttribute(a.getInt(R.styleable.View_outlineProvider, 4052 PROVIDER_BACKGROUND)); 4053 break; 4054 } 4055 } 4056 4057 setOverScrollMode(overScrollMode); 4058 4059 // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet 4060 // the resolved layout direction). Those cached values will be used later during padding 4061 // resolution. 4062 mUserPaddingStart = startPadding; 4063 mUserPaddingEnd = endPadding; 4064 4065 if (background != null) { 4066 setBackground(background); 4067 } 4068 4069 // setBackground above will record that padding is currently provided by the background. 4070 // If we have padding specified via xml, record that here instead and use it. 4071 mLeftPaddingDefined = leftPaddingDefined; 4072 mRightPaddingDefined = rightPaddingDefined; 4073 4074 if (padding >= 0) { 4075 leftPadding = padding; 4076 topPadding = padding; 4077 rightPadding = padding; 4078 bottomPadding = padding; 4079 mUserPaddingLeftInitial = padding; 4080 mUserPaddingRightInitial = padding; 4081 } 4082 4083 if (isRtlCompatibilityMode()) { 4084 // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. 4085 // left / right padding are used if defined (meaning here nothing to do). If they are not 4086 // defined and start / end padding are defined (e.g. in Frameworks resources), then we use 4087 // start / end and resolve them as left / right (layout direction is not taken into account). 4088 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4089 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4090 // defined. 4091 if (!mLeftPaddingDefined && startPaddingDefined) { 4092 leftPadding = startPadding; 4093 } 4094 mUserPaddingLeftInitial = (leftPadding >= 0) ? leftPadding : mUserPaddingLeftInitial; 4095 if (!mRightPaddingDefined && endPaddingDefined) { 4096 rightPadding = endPadding; 4097 } 4098 mUserPaddingRightInitial = (rightPadding >= 0) ? rightPadding : mUserPaddingRightInitial; 4099 } else { 4100 // Jelly Bean MR1 and after case: if start/end defined, they will override any left/right 4101 // values defined. Otherwise, left /right values are used. 4102 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4103 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4104 // defined. 4105 final boolean hasRelativePadding = startPaddingDefined || endPaddingDefined; 4106 4107 if (mLeftPaddingDefined && !hasRelativePadding) { 4108 mUserPaddingLeftInitial = leftPadding; 4109 } 4110 if (mRightPaddingDefined && !hasRelativePadding) { 4111 mUserPaddingRightInitial = rightPadding; 4112 } 4113 } 4114 4115 internalSetPadding( 4116 mUserPaddingLeftInitial, 4117 topPadding >= 0 ? topPadding : mPaddingTop, 4118 mUserPaddingRightInitial, 4119 bottomPadding >= 0 ? bottomPadding : mPaddingBottom); 4120 4121 if (viewFlagMasks != 0) { 4122 setFlags(viewFlagValues, viewFlagMasks); 4123 } 4124 4125 if (initializeScrollbars) { 4126 initializeScrollbarsInternal(a); 4127 } 4128 4129 a.recycle(); 4130 4131 // Needs to be called after mViewFlags is set 4132 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4133 recomputePadding(); 4134 } 4135 4136 if (x != 0 || y != 0) { 4137 scrollTo(x, y); 4138 } 4139 4140 if (transformSet) { 4141 setTranslationX(tx); 4142 setTranslationY(ty); 4143 setTranslationZ(tz); 4144 setElevation(elevation); 4145 setRotation(rotation); 4146 setRotationX(rotationX); 4147 setRotationY(rotationY); 4148 setScaleX(sx); 4149 setScaleY(sy); 4150 } 4151 4152 if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { 4153 setScrollContainer(true); 4154 } 4155 4156 computeOpaqueFlags(); 4157 } 4158 4159 /** 4160 * Non-public constructor for use in testing 4161 */ 4162 View() { 4163 mResources = null; 4164 mRenderNode = RenderNode.create(getClass().getName()); 4165 } 4166 4167 private static SparseArray<String> getAttributeMap() { 4168 if (mAttributeMap == null) { 4169 mAttributeMap = new SparseArray<String>(); 4170 } 4171 return mAttributeMap; 4172 } 4173 4174 private void saveAttributeData(AttributeSet attrs, TypedArray a) { 4175 int length = ((attrs == null ? 0 : attrs.getAttributeCount()) + a.getIndexCount()) * 2; 4176 mAttributes = new String[length]; 4177 4178 int i = 0; 4179 if (attrs != null) { 4180 for (i = 0; i < attrs.getAttributeCount(); i += 2) { 4181 mAttributes[i] = attrs.getAttributeName(i); 4182 mAttributes[i + 1] = attrs.getAttributeValue(i); 4183 } 4184 4185 } 4186 4187 SparseArray<String> attributeMap = getAttributeMap(); 4188 for (int j = 0; j < a.length(); ++j) { 4189 if (a.hasValue(j)) { 4190 try { 4191 int resourceId = a.getResourceId(j, 0); 4192 if (resourceId == 0) { 4193 continue; 4194 } 4195 4196 String resourceName = attributeMap.get(resourceId); 4197 if (resourceName == null) { 4198 resourceName = a.getResources().getResourceName(resourceId); 4199 attributeMap.put(resourceId, resourceName); 4200 } 4201 4202 mAttributes[i] = resourceName; 4203 mAttributes[i + 1] = a.getText(j).toString(); 4204 i += 2; 4205 } catch (Resources.NotFoundException e) { 4206 // if we can't get the resource name, we just ignore it 4207 } 4208 } 4209 } 4210 } 4211 4212 public String toString() { 4213 StringBuilder out = new StringBuilder(128); 4214 out.append(getClass().getName()); 4215 out.append('{'); 4216 out.append(Integer.toHexString(System.identityHashCode(this))); 4217 out.append(' '); 4218 switch (mViewFlags&VISIBILITY_MASK) { 4219 case VISIBLE: out.append('V'); break; 4220 case INVISIBLE: out.append('I'); break; 4221 case GONE: out.append('G'); break; 4222 default: out.append('.'); break; 4223 } 4224 out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); 4225 out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); 4226 out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); 4227 out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); 4228 out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); 4229 out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); 4230 out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); 4231 out.append(' '); 4232 out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); 4233 out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); 4234 out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); 4235 if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { 4236 out.append('p'); 4237 } else { 4238 out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); 4239 } 4240 out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); 4241 out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); 4242 out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); 4243 out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); 4244 out.append(' '); 4245 out.append(mLeft); 4246 out.append(','); 4247 out.append(mTop); 4248 out.append('-'); 4249 out.append(mRight); 4250 out.append(','); 4251 out.append(mBottom); 4252 final int id = getId(); 4253 if (id != NO_ID) { 4254 out.append(" #"); 4255 out.append(Integer.toHexString(id)); 4256 final Resources r = mResources; 4257 if (Resources.resourceHasPackage(id) && r != null) { 4258 try { 4259 String pkgname; 4260 switch (id&0xff000000) { 4261 case 0x7f000000: 4262 pkgname="app"; 4263 break; 4264 case 0x01000000: 4265 pkgname="android"; 4266 break; 4267 default: 4268 pkgname = r.getResourcePackageName(id); 4269 break; 4270 } 4271 String typename = r.getResourceTypeName(id); 4272 String entryname = r.getResourceEntryName(id); 4273 out.append(" "); 4274 out.append(pkgname); 4275 out.append(":"); 4276 out.append(typename); 4277 out.append("/"); 4278 out.append(entryname); 4279 } catch (Resources.NotFoundException e) { 4280 } 4281 } 4282 } 4283 out.append("}"); 4284 return out.toString(); 4285 } 4286 4287 /** 4288 * <p> 4289 * Initializes the fading edges from a given set of styled attributes. This 4290 * method should be called by subclasses that need fading edges and when an 4291 * instance of these subclasses is created programmatically rather than 4292 * being inflated from XML. This method is automatically called when the XML 4293 * is inflated. 4294 * </p> 4295 * 4296 * @param a the styled attributes set to initialize the fading edges from 4297 */ 4298 protected void initializeFadingEdge(TypedArray a) { 4299 // This method probably shouldn't have been included in the SDK to begin with. 4300 // It relies on 'a' having been initialized using an attribute filter array that is 4301 // not publicly available to the SDK. The old method has been renamed 4302 // to initializeFadingEdgeInternal and hidden for framework use only; 4303 // this one initializes using defaults to make it safe to call for apps. 4304 4305 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4306 4307 initializeFadingEdgeInternal(arr); 4308 4309 arr.recycle(); 4310 } 4311 4312 /** 4313 * <p> 4314 * Initializes the fading edges from a given set of styled attributes. This 4315 * method should be called by subclasses that need fading edges and when an 4316 * instance of these subclasses is created programmatically rather than 4317 * being inflated from XML. This method is automatically called when the XML 4318 * is inflated. 4319 * </p> 4320 * 4321 * @param a the styled attributes set to initialize the fading edges from 4322 * @hide This is the real method; the public one is shimmed to be safe to call from apps. 4323 */ 4324 protected void initializeFadingEdgeInternal(TypedArray a) { 4325 initScrollCache(); 4326 4327 mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( 4328 R.styleable.View_fadingEdgeLength, 4329 ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); 4330 } 4331 4332 /** 4333 * Returns the size of the vertical faded edges used to indicate that more 4334 * content in this view is visible. 4335 * 4336 * @return The size in pixels of the vertical faded edge or 0 if vertical 4337 * faded edges are not enabled for this view. 4338 * @attr ref android.R.styleable#View_fadingEdgeLength 4339 */ 4340 public int getVerticalFadingEdgeLength() { 4341 if (isVerticalFadingEdgeEnabled()) { 4342 ScrollabilityCache cache = mScrollCache; 4343 if (cache != null) { 4344 return cache.fadingEdgeLength; 4345 } 4346 } 4347 return 0; 4348 } 4349 4350 /** 4351 * Set the size of the faded edge used to indicate that more content in this 4352 * view is available. Will not change whether the fading edge is enabled; use 4353 * {@link #setVerticalFadingEdgeEnabled(boolean)} or 4354 * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge 4355 * for the vertical or horizontal fading edges. 4356 * 4357 * @param length The size in pixels of the faded edge used to indicate that more 4358 * content in this view is visible. 4359 */ 4360 public void setFadingEdgeLength(int length) { 4361 initScrollCache(); 4362 mScrollCache.fadingEdgeLength = length; 4363 } 4364 4365 /** 4366 * Returns the size of the horizontal faded edges used to indicate that more 4367 * content in this view is visible. 4368 * 4369 * @return The size in pixels of the horizontal faded edge or 0 if horizontal 4370 * faded edges are not enabled for this view. 4371 * @attr ref android.R.styleable#View_fadingEdgeLength 4372 */ 4373 public int getHorizontalFadingEdgeLength() { 4374 if (isHorizontalFadingEdgeEnabled()) { 4375 ScrollabilityCache cache = mScrollCache; 4376 if (cache != null) { 4377 return cache.fadingEdgeLength; 4378 } 4379 } 4380 return 0; 4381 } 4382 4383 /** 4384 * Returns the width of the vertical scrollbar. 4385 * 4386 * @return The width in pixels of the vertical scrollbar or 0 if there 4387 * is no vertical scrollbar. 4388 */ 4389 public int getVerticalScrollbarWidth() { 4390 ScrollabilityCache cache = mScrollCache; 4391 if (cache != null) { 4392 ScrollBarDrawable scrollBar = cache.scrollBar; 4393 if (scrollBar != null) { 4394 int size = scrollBar.getSize(true); 4395 if (size <= 0) { 4396 size = cache.scrollBarSize; 4397 } 4398 return size; 4399 } 4400 return 0; 4401 } 4402 return 0; 4403 } 4404 4405 /** 4406 * Returns the height of the horizontal scrollbar. 4407 * 4408 * @return The height in pixels of the horizontal scrollbar or 0 if 4409 * there is no horizontal scrollbar. 4410 */ 4411 protected int getHorizontalScrollbarHeight() { 4412 ScrollabilityCache cache = mScrollCache; 4413 if (cache != null) { 4414 ScrollBarDrawable scrollBar = cache.scrollBar; 4415 if (scrollBar != null) { 4416 int size = scrollBar.getSize(false); 4417 if (size <= 0) { 4418 size = cache.scrollBarSize; 4419 } 4420 return size; 4421 } 4422 return 0; 4423 } 4424 return 0; 4425 } 4426 4427 /** 4428 * <p> 4429 * Initializes the scrollbars from a given set of styled attributes. This 4430 * method should be called by subclasses that need scrollbars and when an 4431 * instance of these subclasses is created programmatically rather than 4432 * being inflated from XML. This method is automatically called when the XML 4433 * is inflated. 4434 * </p> 4435 * 4436 * @param a the styled attributes set to initialize the scrollbars from 4437 */ 4438 protected void initializeScrollbars(TypedArray a) { 4439 // It's not safe to use this method from apps. The parameter 'a' must have been obtained 4440 // using the View filter array which is not available to the SDK. As such, internal 4441 // framework usage now uses initializeScrollbarsInternal and we grab a default 4442 // TypedArray with the right filter instead here. 4443 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4444 4445 initializeScrollbarsInternal(arr); 4446 4447 // We ignored the method parameter. Recycle the one we actually did use. 4448 arr.recycle(); 4449 } 4450 4451 /** 4452 * <p> 4453 * Initializes the scrollbars from a given set of styled attributes. This 4454 * method should be called by subclasses that need scrollbars and when an 4455 * instance of these subclasses is created programmatically rather than 4456 * being inflated from XML. This method is automatically called when the XML 4457 * is inflated. 4458 * </p> 4459 * 4460 * @param a the styled attributes set to initialize the scrollbars from 4461 * @hide 4462 */ 4463 protected void initializeScrollbarsInternal(TypedArray a) { 4464 initScrollCache(); 4465 4466 final ScrollabilityCache scrollabilityCache = mScrollCache; 4467 4468 if (scrollabilityCache.scrollBar == null) { 4469 scrollabilityCache.scrollBar = new ScrollBarDrawable(); 4470 } 4471 4472 final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); 4473 4474 if (!fadeScrollbars) { 4475 scrollabilityCache.state = ScrollabilityCache.ON; 4476 } 4477 scrollabilityCache.fadeScrollBars = fadeScrollbars; 4478 4479 4480 scrollabilityCache.scrollBarFadeDuration = a.getInt( 4481 R.styleable.View_scrollbarFadeDuration, ViewConfiguration 4482 .getScrollBarFadeDuration()); 4483 scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( 4484 R.styleable.View_scrollbarDefaultDelayBeforeFade, 4485 ViewConfiguration.getScrollDefaultDelay()); 4486 4487 4488 scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( 4489 com.android.internal.R.styleable.View_scrollbarSize, 4490 ViewConfiguration.get(mContext).getScaledScrollBarSize()); 4491 4492 Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); 4493 scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); 4494 4495 Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); 4496 if (thumb != null) { 4497 scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); 4498 } 4499 4500 boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, 4501 false); 4502 if (alwaysDraw) { 4503 scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); 4504 } 4505 4506 track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); 4507 scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); 4508 4509 thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); 4510 if (thumb != null) { 4511 scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); 4512 } 4513 4514 alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, 4515 false); 4516 if (alwaysDraw) { 4517 scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); 4518 } 4519 4520 // Apply layout direction to the new Drawables if needed 4521 final int layoutDirection = getLayoutDirection(); 4522 if (track != null) { 4523 track.setLayoutDirection(layoutDirection); 4524 } 4525 if (thumb != null) { 4526 thumb.setLayoutDirection(layoutDirection); 4527 } 4528 4529 // Re-apply user/background padding so that scrollbar(s) get added 4530 resolvePadding(); 4531 } 4532 4533 /** 4534 * <p> 4535 * Initalizes the scrollability cache if necessary. 4536 * </p> 4537 */ 4538 private void initScrollCache() { 4539 if (mScrollCache == null) { 4540 mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); 4541 } 4542 } 4543 4544 private ScrollabilityCache getScrollCache() { 4545 initScrollCache(); 4546 return mScrollCache; 4547 } 4548 4549 /** 4550 * Set the position of the vertical scroll bar. Should be one of 4551 * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or 4552 * {@link #SCROLLBAR_POSITION_RIGHT}. 4553 * 4554 * @param position Where the vertical scroll bar should be positioned. 4555 */ 4556 public void setVerticalScrollbarPosition(int position) { 4557 if (mVerticalScrollbarPosition != position) { 4558 mVerticalScrollbarPosition = position; 4559 computeOpaqueFlags(); 4560 resolvePadding(); 4561 } 4562 } 4563 4564 /** 4565 * @return The position where the vertical scroll bar will show, if applicable. 4566 * @see #setVerticalScrollbarPosition(int) 4567 */ 4568 public int getVerticalScrollbarPosition() { 4569 return mVerticalScrollbarPosition; 4570 } 4571 4572 ListenerInfo getListenerInfo() { 4573 if (mListenerInfo != null) { 4574 return mListenerInfo; 4575 } 4576 mListenerInfo = new ListenerInfo(); 4577 return mListenerInfo; 4578 } 4579 4580 /** 4581 * Register a callback to be invoked when focus of this view changed. 4582 * 4583 * @param l The callback that will run. 4584 */ 4585 public void setOnFocusChangeListener(OnFocusChangeListener l) { 4586 getListenerInfo().mOnFocusChangeListener = l; 4587 } 4588 4589 /** 4590 * Add a listener that will be called when the bounds of the view change due to 4591 * layout processing. 4592 * 4593 * @param listener The listener that will be called when layout bounds change. 4594 */ 4595 public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { 4596 ListenerInfo li = getListenerInfo(); 4597 if (li.mOnLayoutChangeListeners == null) { 4598 li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); 4599 } 4600 if (!li.mOnLayoutChangeListeners.contains(listener)) { 4601 li.mOnLayoutChangeListeners.add(listener); 4602 } 4603 } 4604 4605 /** 4606 * Remove a listener for layout changes. 4607 * 4608 * @param listener The listener for layout bounds change. 4609 */ 4610 public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { 4611 ListenerInfo li = mListenerInfo; 4612 if (li == null || li.mOnLayoutChangeListeners == null) { 4613 return; 4614 } 4615 li.mOnLayoutChangeListeners.remove(listener); 4616 } 4617 4618 /** 4619 * Add a listener for attach state changes. 4620 * 4621 * This listener will be called whenever this view is attached or detached 4622 * from a window. Remove the listener using 4623 * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. 4624 * 4625 * @param listener Listener to attach 4626 * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) 4627 */ 4628 public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 4629 ListenerInfo li = getListenerInfo(); 4630 if (li.mOnAttachStateChangeListeners == null) { 4631 li.mOnAttachStateChangeListeners 4632 = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); 4633 } 4634 li.mOnAttachStateChangeListeners.add(listener); 4635 } 4636 4637 /** 4638 * Remove a listener for attach state changes. The listener will receive no further 4639 * notification of window attach/detach events. 4640 * 4641 * @param listener Listener to remove 4642 * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) 4643 */ 4644 public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 4645 ListenerInfo li = mListenerInfo; 4646 if (li == null || li.mOnAttachStateChangeListeners == null) { 4647 return; 4648 } 4649 li.mOnAttachStateChangeListeners.remove(listener); 4650 } 4651 4652 /** 4653 * Returns the focus-change callback registered for this view. 4654 * 4655 * @return The callback, or null if one is not registered. 4656 */ 4657 public OnFocusChangeListener getOnFocusChangeListener() { 4658 ListenerInfo li = mListenerInfo; 4659 return li != null ? li.mOnFocusChangeListener : null; 4660 } 4661 4662 /** 4663 * Register a callback to be invoked when this view is clicked. If this view is not 4664 * clickable, it becomes clickable. 4665 * 4666 * @param l The callback that will run 4667 * 4668 * @see #setClickable(boolean) 4669 */ 4670 public void setOnClickListener(OnClickListener l) { 4671 if (!isClickable()) { 4672 setClickable(true); 4673 } 4674 getListenerInfo().mOnClickListener = l; 4675 } 4676 4677 /** 4678 * Return whether this view has an attached OnClickListener. Returns 4679 * true if there is a listener, false if there is none. 4680 */ 4681 public boolean hasOnClickListeners() { 4682 ListenerInfo li = mListenerInfo; 4683 return (li != null && li.mOnClickListener != null); 4684 } 4685 4686 /** 4687 * Register a callback to be invoked when this view is clicked and held. If this view is not 4688 * long clickable, it becomes long clickable. 4689 * 4690 * @param l The callback that will run 4691 * 4692 * @see #setLongClickable(boolean) 4693 */ 4694 public void setOnLongClickListener(OnLongClickListener l) { 4695 if (!isLongClickable()) { 4696 setLongClickable(true); 4697 } 4698 getListenerInfo().mOnLongClickListener = l; 4699 } 4700 4701 /** 4702 * Register a callback to be invoked when the context menu for this view is 4703 * being built. If this view is not long clickable, it becomes long clickable. 4704 * 4705 * @param l The callback that will run 4706 * 4707 */ 4708 public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { 4709 if (!isLongClickable()) { 4710 setLongClickable(true); 4711 } 4712 getListenerInfo().mOnCreateContextMenuListener = l; 4713 } 4714 4715 /** 4716 * Call this view's OnClickListener, if it is defined. Performs all normal 4717 * actions associated with clicking: reporting accessibility event, playing 4718 * a sound, etc. 4719 * 4720 * @return True there was an assigned OnClickListener that was called, false 4721 * otherwise is returned. 4722 */ 4723 public boolean performClick() { 4724 final boolean result; 4725 final ListenerInfo li = mListenerInfo; 4726 if (li != null && li.mOnClickListener != null) { 4727 playSoundEffect(SoundEffectConstants.CLICK); 4728 li.mOnClickListener.onClick(this); 4729 result = true; 4730 } else { 4731 result = false; 4732 } 4733 4734 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 4735 return result; 4736 } 4737 4738 /** 4739 * Directly call any attached OnClickListener. Unlike {@link #performClick()}, 4740 * this only calls the listener, and does not do any associated clicking 4741 * actions like reporting an accessibility event. 4742 * 4743 * @return True there was an assigned OnClickListener that was called, false 4744 * otherwise is returned. 4745 */ 4746 public boolean callOnClick() { 4747 ListenerInfo li = mListenerInfo; 4748 if (li != null && li.mOnClickListener != null) { 4749 li.mOnClickListener.onClick(this); 4750 return true; 4751 } 4752 return false; 4753 } 4754 4755 /** 4756 * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the 4757 * OnLongClickListener did not consume the event. 4758 * 4759 * @return True if one of the above receivers consumed the event, false otherwise. 4760 */ 4761 public boolean performLongClick() { 4762 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); 4763 4764 boolean handled = false; 4765 ListenerInfo li = mListenerInfo; 4766 if (li != null && li.mOnLongClickListener != null) { 4767 handled = li.mOnLongClickListener.onLongClick(View.this); 4768 } 4769 if (!handled) { 4770 handled = showContextMenu(); 4771 } 4772 if (handled) { 4773 performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 4774 } 4775 return handled; 4776 } 4777 4778 /** 4779 * Performs button-related actions during a touch down event. 4780 * 4781 * @param event The event. 4782 * @return True if the down was consumed. 4783 * 4784 * @hide 4785 */ 4786 protected boolean performButtonActionOnTouchDown(MotionEvent event) { 4787 if ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { 4788 if (showContextMenu(event.getX(), event.getY(), event.getMetaState())) { 4789 return true; 4790 } 4791 } 4792 return false; 4793 } 4794 4795 /** 4796 * Bring up the context menu for this view. 4797 * 4798 * @return Whether a context menu was displayed. 4799 */ 4800 public boolean showContextMenu() { 4801 return getParent().showContextMenuForChild(this); 4802 } 4803 4804 /** 4805 * Bring up the context menu for this view, referring to the item under the specified point. 4806 * 4807 * @param x The referenced x coordinate. 4808 * @param y The referenced y coordinate. 4809 * @param metaState The keyboard modifiers that were pressed. 4810 * @return Whether a context menu was displayed. 4811 * 4812 * @hide 4813 */ 4814 public boolean showContextMenu(float x, float y, int metaState) { 4815 return showContextMenu(); 4816 } 4817 4818 /** 4819 * Start an action mode. 4820 * 4821 * @param callback Callback that will control the lifecycle of the action mode 4822 * @return The new action mode if it is started, null otherwise 4823 * 4824 * @see ActionMode 4825 */ 4826 public ActionMode startActionMode(ActionMode.Callback callback) { 4827 ViewParent parent = getParent(); 4828 if (parent == null) return null; 4829 return parent.startActionModeForChild(this, callback); 4830 } 4831 4832 /** 4833 * Register a callback to be invoked when a hardware key is pressed in this view. 4834 * Key presses in software input methods will generally not trigger the methods of 4835 * this listener. 4836 * @param l the key listener to attach to this view 4837 */ 4838 public void setOnKeyListener(OnKeyListener l) { 4839 getListenerInfo().mOnKeyListener = l; 4840 } 4841 4842 /** 4843 * Register a callback to be invoked when a touch event is sent to this view. 4844 * @param l the touch listener to attach to this view 4845 */ 4846 public void setOnTouchListener(OnTouchListener l) { 4847 getListenerInfo().mOnTouchListener = l; 4848 } 4849 4850 /** 4851 * Register a callback to be invoked when a generic motion event is sent to this view. 4852 * @param l the generic motion listener to attach to this view 4853 */ 4854 public void setOnGenericMotionListener(OnGenericMotionListener l) { 4855 getListenerInfo().mOnGenericMotionListener = l; 4856 } 4857 4858 /** 4859 * Register a callback to be invoked when a hover event is sent to this view. 4860 * @param l the hover listener to attach to this view 4861 */ 4862 public void setOnHoverListener(OnHoverListener l) { 4863 getListenerInfo().mOnHoverListener = l; 4864 } 4865 4866 /** 4867 * Register a drag event listener callback object for this View. The parameter is 4868 * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a 4869 * View, the system calls the 4870 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. 4871 * @param l An implementation of {@link android.view.View.OnDragListener}. 4872 */ 4873 public void setOnDragListener(OnDragListener l) { 4874 getListenerInfo().mOnDragListener = l; 4875 } 4876 4877 /** 4878 * Give this view focus. This will cause 4879 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. 4880 * 4881 * Note: this does not check whether this {@link View} should get focus, it just 4882 * gives it focus no matter what. It should only be called internally by framework 4883 * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. 4884 * 4885 * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, 4886 * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which 4887 * focus moved when requestFocus() is called. It may not always 4888 * apply, in which case use the default View.FOCUS_DOWN. 4889 * @param previouslyFocusedRect The rectangle of the view that had focus 4890 * prior in this View's coordinate system. 4891 */ 4892 void handleFocusGainInternal(@FocusRealDirection int direction, Rect previouslyFocusedRect) { 4893 if (DBG) { 4894 System.out.println(this + " requestFocus()"); 4895 } 4896 4897 if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { 4898 mPrivateFlags |= PFLAG_FOCUSED; 4899 4900 View oldFocus = (mAttachInfo != null) ? getRootView().findFocus() : null; 4901 4902 if (mParent != null) { 4903 mParent.requestChildFocus(this, this); 4904 } 4905 4906 if (mAttachInfo != null) { 4907 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, this); 4908 } 4909 4910 onFocusChanged(true, direction, previouslyFocusedRect); 4911 manageFocusHotspot(true, oldFocus); 4912 refreshDrawableState(); 4913 } 4914 } 4915 4916 /** 4917 * Forwards focus information to the background drawable, if necessary. When 4918 * the view is gaining focus, <code>v</code> is the previous focus holder. 4919 * When the view is losing focus, <code>v</code> is the next focus holder. 4920 * 4921 * @param focused whether this view is focused 4922 * @param v previous or the next focus holder, or null if none 4923 */ 4924 private void manageFocusHotspot(boolean focused, View v) { 4925 final Rect r = new Rect(); 4926 if (v != null && mAttachInfo != null) { 4927 v.getHotspotBounds(r); 4928 final int[] location = mAttachInfo.mTmpLocation; 4929 getLocationOnScreen(location); 4930 r.offset(-location[0], -location[1]); 4931 } else { 4932 r.set(0, 0, mRight - mLeft, mBottom - mTop); 4933 } 4934 4935 final float x = r.exactCenterX(); 4936 final float y = r.exactCenterY(); 4937 drawableHotspotChanged(x, y); 4938 } 4939 4940 /** 4941 * Populates <code>outRect</code> with the hotspot bounds. By default, 4942 * the hotspot bounds are identical to the screen bounds. 4943 * 4944 * @param outRect rect to populate with hotspot bounds 4945 * @hide Only for internal use by views and widgets. 4946 */ 4947 public void getHotspotBounds(Rect outRect) { 4948 final Drawable background = getBackground(); 4949 if (background != null) { 4950 background.getHotspotBounds(outRect); 4951 } else { 4952 getBoundsOnScreen(outRect); 4953 } 4954 } 4955 4956 /** 4957 * Request that a rectangle of this view be visible on the screen, 4958 * scrolling if necessary just enough. 4959 * 4960 * <p>A View should call this if it maintains some notion of which part 4961 * of its content is interesting. For example, a text editing view 4962 * should call this when its cursor moves. 4963 * 4964 * @param rectangle The rectangle. 4965 * @return Whether any parent scrolled. 4966 */ 4967 public boolean requestRectangleOnScreen(Rect rectangle) { 4968 return requestRectangleOnScreen(rectangle, false); 4969 } 4970 4971 /** 4972 * Request that a rectangle of this view be visible on the screen, 4973 * scrolling if necessary just enough. 4974 * 4975 * <p>A View should call this if it maintains some notion of which part 4976 * of its content is interesting. For example, a text editing view 4977 * should call this when its cursor moves. 4978 * 4979 * <p>When <code>immediate</code> is set to true, scrolling will not be 4980 * animated. 4981 * 4982 * @param rectangle The rectangle. 4983 * @param immediate True to forbid animated scrolling, false otherwise 4984 * @return Whether any parent scrolled. 4985 */ 4986 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 4987 if (mParent == null) { 4988 return false; 4989 } 4990 4991 View child = this; 4992 4993 RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); 4994 position.set(rectangle); 4995 4996 ViewParent parent = mParent; 4997 boolean scrolled = false; 4998 while (parent != null) { 4999 rectangle.set((int) position.left, (int) position.top, 5000 (int) position.right, (int) position.bottom); 5001 5002 scrolled |= parent.requestChildRectangleOnScreen(child, 5003 rectangle, immediate); 5004 5005 if (!child.hasIdentityMatrix()) { 5006 child.getMatrix().mapRect(position); 5007 } 5008 5009 position.offset(child.mLeft, child.mTop); 5010 5011 if (!(parent instanceof View)) { 5012 break; 5013 } 5014 5015 View parentView = (View) parent; 5016 5017 position.offset(-parentView.getScrollX(), -parentView.getScrollY()); 5018 5019 child = parentView; 5020 parent = child.getParent(); 5021 } 5022 5023 return scrolled; 5024 } 5025 5026 /** 5027 * Called when this view wants to give up focus. If focus is cleared 5028 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. 5029 * <p> 5030 * <strong>Note:</strong> When a View clears focus the framework is trying 5031 * to give focus to the first focusable View from the top. Hence, if this 5032 * View is the first from the top that can take focus, then all callbacks 5033 * related to clearing focus will be invoked after wich the framework will 5034 * give focus to this view. 5035 * </p> 5036 */ 5037 public void clearFocus() { 5038 if (DBG) { 5039 System.out.println(this + " clearFocus()"); 5040 } 5041 5042 clearFocusInternal(null, true, true); 5043 } 5044 5045 /** 5046 * Clears focus from the view, optionally propagating the change up through 5047 * the parent hierarchy and requesting that the root view place new focus. 5048 * 5049 * @param propagate whether to propagate the change up through the parent 5050 * hierarchy 5051 * @param refocus when propagate is true, specifies whether to request the 5052 * root view place new focus 5053 */ 5054 void clearFocusInternal(View focused, boolean propagate, boolean refocus) { 5055 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 5056 mPrivateFlags &= ~PFLAG_FOCUSED; 5057 5058 if (propagate && mParent != null) { 5059 mParent.clearChildFocus(this); 5060 } 5061 5062 onFocusChanged(false, 0, null); 5063 5064 manageFocusHotspot(false, focused); 5065 refreshDrawableState(); 5066 5067 if (propagate && (!refocus || !rootViewRequestFocus())) { 5068 notifyGlobalFocusCleared(this); 5069 } 5070 } 5071 } 5072 5073 void notifyGlobalFocusCleared(View oldFocus) { 5074 if (oldFocus != null && mAttachInfo != null) { 5075 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, null); 5076 } 5077 } 5078 5079 boolean rootViewRequestFocus() { 5080 final View root = getRootView(); 5081 return root != null && root.requestFocus(); 5082 } 5083 5084 /** 5085 * Called internally by the view system when a new view is getting focus. 5086 * This is what clears the old focus. 5087 * <p> 5088 * <b>NOTE:</b> The parent view's focused child must be updated manually 5089 * after calling this method. Otherwise, the view hierarchy may be left in 5090 * an inconstent state. 5091 */ 5092 void unFocus(View focused) { 5093 if (DBG) { 5094 System.out.println(this + " unFocus()"); 5095 } 5096 5097 clearFocusInternal(focused, false, false); 5098 } 5099 5100 /** 5101 * Returns true if this view has focus iteself, or is the ancestor of the 5102 * view that has focus. 5103 * 5104 * @return True if this view has or contains focus, false otherwise. 5105 */ 5106 @ViewDebug.ExportedProperty(category = "focus") 5107 public boolean hasFocus() { 5108 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 5109 } 5110 5111 /** 5112 * Returns true if this view is focusable or if it contains a reachable View 5113 * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" 5114 * is a View whose parents do not block descendants focus. 5115 * 5116 * Only {@link #VISIBLE} views are considered focusable. 5117 * 5118 * @return True if the view is focusable or if the view contains a focusable 5119 * View, false otherwise. 5120 * 5121 * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS 5122 * @see ViewGroup#getTouchscreenBlocksFocus() 5123 */ 5124 public boolean hasFocusable() { 5125 if (!isFocusableInTouchMode()) { 5126 for (ViewParent p = mParent; p instanceof ViewGroup; p = p.getParent()) { 5127 final ViewGroup g = (ViewGroup) p; 5128 if (g.shouldBlockFocusForTouchscreen()) { 5129 return false; 5130 } 5131 } 5132 } 5133 return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); 5134 } 5135 5136 /** 5137 * Called by the view system when the focus state of this view changes. 5138 * When the focus change event is caused by directional navigation, direction 5139 * and previouslyFocusedRect provide insight into where the focus is coming from. 5140 * When overriding, be sure to call up through to the super class so that 5141 * the standard focus handling will occur. 5142 * 5143 * @param gainFocus True if the View has focus; false otherwise. 5144 * @param direction The direction focus has moved when requestFocus() 5145 * is called to give this view focus. Values are 5146 * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, 5147 * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. 5148 * It may not always apply, in which case use the default. 5149 * @param previouslyFocusedRect The rectangle, in this view's coordinate 5150 * system, of the previously focused view. If applicable, this will be 5151 * passed in as finer grained information about where the focus is coming 5152 * from (in addition to direction). Will be <code>null</code> otherwise. 5153 */ 5154 protected void onFocusChanged(boolean gainFocus, @FocusDirection int direction, 5155 @Nullable Rect previouslyFocusedRect) { 5156 if (gainFocus) { 5157 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 5158 } else { 5159 notifyViewAccessibilityStateChangedIfNeeded( 5160 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 5161 } 5162 5163 InputMethodManager imm = InputMethodManager.peekInstance(); 5164 if (!gainFocus) { 5165 if (isPressed()) { 5166 setPressed(false); 5167 } 5168 if (imm != null && mAttachInfo != null 5169 && mAttachInfo.mHasWindowFocus) { 5170 imm.focusOut(this); 5171 } 5172 onFocusLost(); 5173 } else if (imm != null && mAttachInfo != null 5174 && mAttachInfo.mHasWindowFocus) { 5175 imm.focusIn(this); 5176 } 5177 5178 invalidate(true); 5179 ListenerInfo li = mListenerInfo; 5180 if (li != null && li.mOnFocusChangeListener != null) { 5181 li.mOnFocusChangeListener.onFocusChange(this, gainFocus); 5182 } 5183 5184 if (mAttachInfo != null) { 5185 mAttachInfo.mKeyDispatchState.reset(this); 5186 } 5187 } 5188 5189 /** 5190 * Sends an accessibility event of the given type. If accessibility is 5191 * not enabled this method has no effect. The default implementation calls 5192 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first 5193 * to populate information about the event source (this View), then calls 5194 * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to 5195 * populate the text content of the event source including its descendants, 5196 * and last calls 5197 * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} 5198 * on its parent to resuest sending of the event to interested parties. 5199 * <p> 5200 * If an {@link AccessibilityDelegate} has been specified via calling 5201 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5202 * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is 5203 * responsible for handling this call. 5204 * </p> 5205 * 5206 * @param eventType The type of the event to send, as defined by several types from 5207 * {@link android.view.accessibility.AccessibilityEvent}, such as 5208 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or 5209 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. 5210 * 5211 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5212 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5213 * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) 5214 * @see AccessibilityDelegate 5215 */ 5216 public void sendAccessibilityEvent(int eventType) { 5217 if (mAccessibilityDelegate != null) { 5218 mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); 5219 } else { 5220 sendAccessibilityEventInternal(eventType); 5221 } 5222 } 5223 5224 /** 5225 * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} 5226 * {@link AccessibilityEvent} to make an announcement which is related to some 5227 * sort of a context change for which none of the events representing UI transitions 5228 * is a good fit. For example, announcing a new page in a book. If accessibility 5229 * is not enabled this method does nothing. 5230 * 5231 * @param text The announcement text. 5232 */ 5233 public void announceForAccessibility(CharSequence text) { 5234 if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { 5235 AccessibilityEvent event = AccessibilityEvent.obtain( 5236 AccessibilityEvent.TYPE_ANNOUNCEMENT); 5237 onInitializeAccessibilityEvent(event); 5238 event.getText().add(text); 5239 event.setContentDescription(null); 5240 mParent.requestSendAccessibilityEvent(this, event); 5241 } 5242 } 5243 5244 /** 5245 * @see #sendAccessibilityEvent(int) 5246 * 5247 * Note: Called from the default {@link AccessibilityDelegate}. 5248 */ 5249 void sendAccessibilityEventInternal(int eventType) { 5250 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 5251 sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); 5252 } 5253 } 5254 5255 /** 5256 * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but 5257 * takes as an argument an empty {@link AccessibilityEvent} and does not 5258 * perform a check whether accessibility is enabled. 5259 * <p> 5260 * If an {@link AccessibilityDelegate} has been specified via calling 5261 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5262 * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} 5263 * is responsible for handling this call. 5264 * </p> 5265 * 5266 * @param event The event to send. 5267 * 5268 * @see #sendAccessibilityEvent(int) 5269 */ 5270 public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { 5271 if (mAccessibilityDelegate != null) { 5272 mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); 5273 } else { 5274 sendAccessibilityEventUncheckedInternal(event); 5275 } 5276 } 5277 5278 /** 5279 * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) 5280 * 5281 * Note: Called from the default {@link AccessibilityDelegate}. 5282 */ 5283 void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { 5284 if (!isShown()) { 5285 return; 5286 } 5287 onInitializeAccessibilityEvent(event); 5288 // Only a subset of accessibility events populates text content. 5289 if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { 5290 dispatchPopulateAccessibilityEvent(event); 5291 } 5292 // In the beginning we called #isShown(), so we know that getParent() is not null. 5293 getParent().requestSendAccessibilityEvent(this, event); 5294 } 5295 5296 /** 5297 * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then 5298 * to its children for adding their text content to the event. Note that the 5299 * event text is populated in a separate dispatch path since we add to the 5300 * event not only the text of the source but also the text of all its descendants. 5301 * A typical implementation will call 5302 * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view 5303 * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5304 * on each child. Override this method if custom population of the event text 5305 * content is required. 5306 * <p> 5307 * If an {@link AccessibilityDelegate} has been specified via calling 5308 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5309 * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} 5310 * is responsible for handling this call. 5311 * </p> 5312 * <p> 5313 * <em>Note:</em> Accessibility events of certain types are not dispatched for 5314 * populating the event text via this method. For details refer to {@link AccessibilityEvent}. 5315 * </p> 5316 * 5317 * @param event The event. 5318 * 5319 * @return True if the event population was completed. 5320 */ 5321 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 5322 if (mAccessibilityDelegate != null) { 5323 return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); 5324 } else { 5325 return dispatchPopulateAccessibilityEventInternal(event); 5326 } 5327 } 5328 5329 /** 5330 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5331 * 5332 * Note: Called from the default {@link AccessibilityDelegate}. 5333 */ 5334 boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5335 onPopulateAccessibilityEvent(event); 5336 return false; 5337 } 5338 5339 /** 5340 * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5341 * giving a chance to this View to populate the accessibility event with its 5342 * text content. While this method is free to modify event 5343 * attributes other than text content, doing so should normally be performed in 5344 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. 5345 * <p> 5346 * Example: Adding formatted date string to an accessibility event in addition 5347 * to the text added by the super implementation: 5348 * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5349 * super.onPopulateAccessibilityEvent(event); 5350 * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; 5351 * String selectedDateUtterance = DateUtils.formatDateTime(mContext, 5352 * mCurrentDate.getTimeInMillis(), flags); 5353 * event.getText().add(selectedDateUtterance); 5354 * }</pre> 5355 * <p> 5356 * If an {@link AccessibilityDelegate} has been specified via calling 5357 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5358 * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} 5359 * is responsible for handling this call. 5360 * </p> 5361 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5362 * information to the event, in case the default implementation has basic information to add. 5363 * </p> 5364 * 5365 * @param event The accessibility event which to populate. 5366 * 5367 * @see #sendAccessibilityEvent(int) 5368 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5369 */ 5370 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5371 if (mAccessibilityDelegate != null) { 5372 mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); 5373 } else { 5374 onPopulateAccessibilityEventInternal(event); 5375 } 5376 } 5377 5378 /** 5379 * @see #onPopulateAccessibilityEvent(AccessibilityEvent) 5380 * 5381 * Note: Called from the default {@link AccessibilityDelegate}. 5382 */ 5383 void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5384 } 5385 5386 /** 5387 * Initializes an {@link AccessibilityEvent} with information about 5388 * this View which is the event source. In other words, the source of 5389 * an accessibility event is the view whose state change triggered firing 5390 * the event. 5391 * <p> 5392 * Example: Setting the password property of an event in addition 5393 * to properties set by the super implementation: 5394 * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5395 * super.onInitializeAccessibilityEvent(event); 5396 * event.setPassword(true); 5397 * }</pre> 5398 * <p> 5399 * If an {@link AccessibilityDelegate} has been specified via calling 5400 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5401 * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} 5402 * is responsible for handling this call. 5403 * </p> 5404 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5405 * information to the event, in case the default implementation has basic information to add. 5406 * </p> 5407 * @param event The event to initialize. 5408 * 5409 * @see #sendAccessibilityEvent(int) 5410 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5411 */ 5412 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5413 if (mAccessibilityDelegate != null) { 5414 mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); 5415 } else { 5416 onInitializeAccessibilityEventInternal(event); 5417 } 5418 } 5419 5420 /** 5421 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5422 * 5423 * Note: Called from the default {@link AccessibilityDelegate}. 5424 */ 5425 void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 5426 event.setSource(this); 5427 event.setClassName(View.class.getName()); 5428 event.setPackageName(getContext().getPackageName()); 5429 event.setEnabled(isEnabled()); 5430 event.setContentDescription(mContentDescription); 5431 5432 switch (event.getEventType()) { 5433 case AccessibilityEvent.TYPE_VIEW_FOCUSED: { 5434 ArrayList<View> focusablesTempList = (mAttachInfo != null) 5435 ? mAttachInfo.mTempArrayList : new ArrayList<View>(); 5436 getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL); 5437 event.setItemCount(focusablesTempList.size()); 5438 event.setCurrentItemIndex(focusablesTempList.indexOf(this)); 5439 if (mAttachInfo != null) { 5440 focusablesTempList.clear(); 5441 } 5442 } break; 5443 case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED: { 5444 CharSequence text = getIterableTextForAccessibility(); 5445 if (text != null && text.length() > 0) { 5446 event.setFromIndex(getAccessibilitySelectionStart()); 5447 event.setToIndex(getAccessibilitySelectionEnd()); 5448 event.setItemCount(text.length()); 5449 } 5450 } break; 5451 } 5452 } 5453 5454 /** 5455 * Returns an {@link AccessibilityNodeInfo} representing this view from the 5456 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 5457 * This method is responsible for obtaining an accessibility node info from a 5458 * pool of reusable instances and calling 5459 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to 5460 * initialize the former. 5461 * <p> 5462 * Note: The client is responsible for recycling the obtained instance by calling 5463 * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. 5464 * </p> 5465 * 5466 * @return A populated {@link AccessibilityNodeInfo}. 5467 * 5468 * @see AccessibilityNodeInfo 5469 */ 5470 public AccessibilityNodeInfo createAccessibilityNodeInfo() { 5471 if (mAccessibilityDelegate != null) { 5472 return mAccessibilityDelegate.createAccessibilityNodeInfo(this); 5473 } else { 5474 return createAccessibilityNodeInfoInternal(); 5475 } 5476 } 5477 5478 /** 5479 * @see #createAccessibilityNodeInfo() 5480 */ 5481 AccessibilityNodeInfo createAccessibilityNodeInfoInternal() { 5482 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 5483 if (provider != null) { 5484 return provider.createAccessibilityNodeInfo(View.NO_ID); 5485 } else { 5486 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); 5487 onInitializeAccessibilityNodeInfo(info); 5488 return info; 5489 } 5490 } 5491 5492 /** 5493 * Initializes an {@link AccessibilityNodeInfo} with information about this view. 5494 * The base implementation sets: 5495 * <ul> 5496 * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> 5497 * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> 5498 * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> 5499 * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> 5500 * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> 5501 * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> 5502 * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> 5503 * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> 5504 * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> 5505 * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> 5506 * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> 5507 * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> 5508 * </ul> 5509 * <p> 5510 * Subclasses should override this method, call the super implementation, 5511 * and set additional attributes. 5512 * </p> 5513 * <p> 5514 * If an {@link AccessibilityDelegate} has been specified via calling 5515 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5516 * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} 5517 * is responsible for handling this call. 5518 * </p> 5519 * 5520 * @param info The instance to initialize. 5521 */ 5522 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 5523 if (mAccessibilityDelegate != null) { 5524 mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); 5525 } else { 5526 onInitializeAccessibilityNodeInfoInternal(info); 5527 } 5528 } 5529 5530 /** 5531 * Gets the location of this view in screen coordintates. 5532 * 5533 * @param outRect The output location 5534 * @hide 5535 */ 5536 public void getBoundsOnScreen(Rect outRect) { 5537 if (mAttachInfo == null) { 5538 return; 5539 } 5540 5541 RectF position = mAttachInfo.mTmpTransformRect; 5542 position.set(0, 0, mRight - mLeft, mBottom - mTop); 5543 5544 if (!hasIdentityMatrix()) { 5545 getMatrix().mapRect(position); 5546 } 5547 5548 position.offset(mLeft, mTop); 5549 5550 ViewParent parent = mParent; 5551 while (parent instanceof View) { 5552 View parentView = (View) parent; 5553 5554 position.offset(-parentView.mScrollX, -parentView.mScrollY); 5555 5556 if (!parentView.hasIdentityMatrix()) { 5557 parentView.getMatrix().mapRect(position); 5558 } 5559 5560 position.offset(parentView.mLeft, parentView.mTop); 5561 5562 parent = parentView.mParent; 5563 } 5564 5565 if (parent instanceof ViewRootImpl) { 5566 ViewRootImpl viewRootImpl = (ViewRootImpl) parent; 5567 position.offset(0, -viewRootImpl.mCurScrollY); 5568 } 5569 5570 position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 5571 5572 outRect.set((int) (position.left + 0.5f), (int) (position.top + 0.5f), 5573 (int) (position.right + 0.5f), (int) (position.bottom + 0.5f)); 5574 } 5575 5576 /** 5577 * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 5578 * 5579 * Note: Called from the default {@link AccessibilityDelegate}. 5580 */ 5581 void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 5582 Rect bounds = mAttachInfo.mTmpInvalRect; 5583 5584 getDrawingRect(bounds); 5585 info.setBoundsInParent(bounds); 5586 5587 getBoundsOnScreen(bounds); 5588 info.setBoundsInScreen(bounds); 5589 5590 ViewParent parent = getParentForAccessibility(); 5591 if (parent instanceof View) { 5592 info.setParent((View) parent); 5593 } 5594 5595 if (mID != View.NO_ID) { 5596 View rootView = getRootView(); 5597 if (rootView == null) { 5598 rootView = this; 5599 } 5600 View label = rootView.findLabelForView(this, mID); 5601 if (label != null) { 5602 info.setLabeledBy(label); 5603 } 5604 5605 if ((mAttachInfo.mAccessibilityFetchFlags 5606 & AccessibilityNodeInfo.FLAG_REPORT_VIEW_IDS) != 0 5607 && Resources.resourceHasPackage(mID)) { 5608 try { 5609 String viewId = getResources().getResourceName(mID); 5610 info.setViewIdResourceName(viewId); 5611 } catch (Resources.NotFoundException nfe) { 5612 /* ignore */ 5613 } 5614 } 5615 } 5616 5617 if (mLabelForId != View.NO_ID) { 5618 View rootView = getRootView(); 5619 if (rootView == null) { 5620 rootView = this; 5621 } 5622 View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); 5623 if (labeled != null) { 5624 info.setLabelFor(labeled); 5625 } 5626 } 5627 5628 info.setVisibleToUser(isVisibleToUser()); 5629 5630 info.setPackageName(mContext.getPackageName()); 5631 info.setClassName(View.class.getName()); 5632 info.setContentDescription(getContentDescription()); 5633 5634 info.setEnabled(isEnabled()); 5635 info.setClickable(isClickable()); 5636 info.setFocusable(isFocusable()); 5637 info.setFocused(isFocused()); 5638 info.setAccessibilityFocused(isAccessibilityFocused()); 5639 info.setSelected(isSelected()); 5640 info.setLongClickable(isLongClickable()); 5641 info.setLiveRegion(getAccessibilityLiveRegion()); 5642 5643 // TODO: These make sense only if we are in an AdapterView but all 5644 // views can be selected. Maybe from accessibility perspective 5645 // we should report as selectable view in an AdapterView. 5646 info.addAction(AccessibilityNodeInfo.ACTION_SELECT); 5647 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); 5648 5649 if (isFocusable()) { 5650 if (isFocused()) { 5651 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); 5652 } else { 5653 info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); 5654 } 5655 } 5656 5657 if (!isAccessibilityFocused()) { 5658 info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); 5659 } else { 5660 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 5661 } 5662 5663 if (isClickable() && isEnabled()) { 5664 info.addAction(AccessibilityNodeInfo.ACTION_CLICK); 5665 } 5666 5667 if (isLongClickable() && isEnabled()) { 5668 info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); 5669 } 5670 5671 CharSequence text = getIterableTextForAccessibility(); 5672 if (text != null && text.length() > 0) { 5673 info.setTextSelection(getAccessibilitySelectionStart(), getAccessibilitySelectionEnd()); 5674 5675 info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION); 5676 info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY); 5677 info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY); 5678 info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER 5679 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD 5680 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH); 5681 } 5682 } 5683 5684 private View findLabelForView(View view, int labeledId) { 5685 if (mMatchLabelForPredicate == null) { 5686 mMatchLabelForPredicate = new MatchLabelForPredicate(); 5687 } 5688 mMatchLabelForPredicate.mLabeledId = labeledId; 5689 return findViewByPredicateInsideOut(view, mMatchLabelForPredicate); 5690 } 5691 5692 /** 5693 * Computes whether this view is visible to the user. Such a view is 5694 * attached, visible, all its predecessors are visible, it is not clipped 5695 * entirely by its predecessors, and has an alpha greater than zero. 5696 * 5697 * @return Whether the view is visible on the screen. 5698 * 5699 * @hide 5700 */ 5701 protected boolean isVisibleToUser() { 5702 return isVisibleToUser(null); 5703 } 5704 5705 /** 5706 * Computes whether the given portion of this view is visible to the user. 5707 * Such a view is attached, visible, all its predecessors are visible, 5708 * has an alpha greater than zero, and the specified portion is not 5709 * clipped entirely by its predecessors. 5710 * 5711 * @param boundInView the portion of the view to test; coordinates should be relative; may be 5712 * <code>null</code>, and the entire view will be tested in this case. 5713 * When <code>true</code> is returned by the function, the actual visible 5714 * region will be stored in this parameter; that is, if boundInView is fully 5715 * contained within the view, no modification will be made, otherwise regions 5716 * outside of the visible area of the view will be clipped. 5717 * 5718 * @return Whether the specified portion of the view is visible on the screen. 5719 * 5720 * @hide 5721 */ 5722 protected boolean isVisibleToUser(Rect boundInView) { 5723 if (mAttachInfo != null) { 5724 // Attached to invisible window means this view is not visible. 5725 if (mAttachInfo.mWindowVisibility != View.VISIBLE) { 5726 return false; 5727 } 5728 // An invisible predecessor or one with alpha zero means 5729 // that this view is not visible to the user. 5730 Object current = this; 5731 while (current instanceof View) { 5732 View view = (View) current; 5733 // We have attach info so this view is attached and there is no 5734 // need to check whether we reach to ViewRootImpl on the way up. 5735 if (view.getAlpha() <= 0 || view.getTransitionAlpha() <= 0 || 5736 view.getVisibility() != VISIBLE) { 5737 return false; 5738 } 5739 current = view.mParent; 5740 } 5741 // Check if the view is entirely covered by its predecessors. 5742 Rect visibleRect = mAttachInfo.mTmpInvalRect; 5743 Point offset = mAttachInfo.mPoint; 5744 if (!getGlobalVisibleRect(visibleRect, offset)) { 5745 return false; 5746 } 5747 // Check if the visible portion intersects the rectangle of interest. 5748 if (boundInView != null) { 5749 visibleRect.offset(-offset.x, -offset.y); 5750 return boundInView.intersect(visibleRect); 5751 } 5752 return true; 5753 } 5754 return false; 5755 } 5756 5757 /** 5758 * Returns the delegate for implementing accessibility support via 5759 * composition. For more details see {@link AccessibilityDelegate}. 5760 * 5761 * @return The delegate, or null if none set. 5762 * 5763 * @hide 5764 */ 5765 public AccessibilityDelegate getAccessibilityDelegate() { 5766 return mAccessibilityDelegate; 5767 } 5768 5769 /** 5770 * Sets a delegate for implementing accessibility support via composition as 5771 * opposed to inheritance. The delegate's primary use is for implementing 5772 * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. 5773 * 5774 * @param delegate The delegate instance. 5775 * 5776 * @see AccessibilityDelegate 5777 */ 5778 public void setAccessibilityDelegate(AccessibilityDelegate delegate) { 5779 mAccessibilityDelegate = delegate; 5780 } 5781 5782 /** 5783 * Gets the provider for managing a virtual view hierarchy rooted at this View 5784 * and reported to {@link android.accessibilityservice.AccessibilityService}s 5785 * that explore the window content. 5786 * <p> 5787 * If this method returns an instance, this instance is responsible for managing 5788 * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this 5789 * View including the one representing the View itself. Similarly the returned 5790 * instance is responsible for performing accessibility actions on any virtual 5791 * view or the root view itself. 5792 * </p> 5793 * <p> 5794 * If an {@link AccessibilityDelegate} has been specified via calling 5795 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5796 * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} 5797 * is responsible for handling this call. 5798 * </p> 5799 * 5800 * @return The provider. 5801 * 5802 * @see AccessibilityNodeProvider 5803 */ 5804 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 5805 if (mAccessibilityDelegate != null) { 5806 return mAccessibilityDelegate.getAccessibilityNodeProvider(this); 5807 } else { 5808 return null; 5809 } 5810 } 5811 5812 /** 5813 * Gets the unique identifier of this view on the screen for accessibility purposes. 5814 * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. 5815 * 5816 * @return The view accessibility id. 5817 * 5818 * @hide 5819 */ 5820 public int getAccessibilityViewId() { 5821 if (mAccessibilityViewId == NO_ID) { 5822 mAccessibilityViewId = sNextAccessibilityViewId++; 5823 } 5824 return mAccessibilityViewId; 5825 } 5826 5827 /** 5828 * Gets the unique identifier of the window in which this View reseides. 5829 * 5830 * @return The window accessibility id. 5831 * 5832 * @hide 5833 */ 5834 public int getAccessibilityWindowId() { 5835 return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId 5836 : AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 5837 } 5838 5839 /** 5840 * Gets the {@link View} description. It briefly describes the view and is 5841 * primarily used for accessibility support. Set this property to enable 5842 * better accessibility support for your application. This is especially 5843 * true for views that do not have textual representation (For example, 5844 * ImageButton). 5845 * 5846 * @return The content description. 5847 * 5848 * @attr ref android.R.styleable#View_contentDescription 5849 */ 5850 @ViewDebug.ExportedProperty(category = "accessibility") 5851 public CharSequence getContentDescription() { 5852 return mContentDescription; 5853 } 5854 5855 /** 5856 * Sets the {@link View} description. It briefly describes the view and is 5857 * primarily used for accessibility support. Set this property to enable 5858 * better accessibility support for your application. This is especially 5859 * true for views that do not have textual representation (For example, 5860 * ImageButton). 5861 * 5862 * @param contentDescription The content description. 5863 * 5864 * @attr ref android.R.styleable#View_contentDescription 5865 */ 5866 @RemotableViewMethod 5867 public void setContentDescription(CharSequence contentDescription) { 5868 if (mContentDescription == null) { 5869 if (contentDescription == null) { 5870 return; 5871 } 5872 } else if (mContentDescription.equals(contentDescription)) { 5873 return; 5874 } 5875 mContentDescription = contentDescription; 5876 final boolean nonEmptyDesc = contentDescription != null && contentDescription.length() > 0; 5877 if (nonEmptyDesc && getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 5878 setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); 5879 notifySubtreeAccessibilityStateChangedIfNeeded(); 5880 } else { 5881 notifyViewAccessibilityStateChangedIfNeeded( 5882 AccessibilityEvent.CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION); 5883 } 5884 } 5885 5886 /** 5887 * Gets the id of a view for which this view serves as a label for 5888 * accessibility purposes. 5889 * 5890 * @return The labeled view id. 5891 */ 5892 @ViewDebug.ExportedProperty(category = "accessibility") 5893 public int getLabelFor() { 5894 return mLabelForId; 5895 } 5896 5897 /** 5898 * Sets the id of a view for which this view serves as a label for 5899 * accessibility purposes. 5900 * 5901 * @param id The labeled view id. 5902 */ 5903 @RemotableViewMethod 5904 public void setLabelFor(int id) { 5905 mLabelForId = id; 5906 if (mLabelForId != View.NO_ID 5907 && mID == View.NO_ID) { 5908 mID = generateViewId(); 5909 } 5910 } 5911 5912 /** 5913 * Invoked whenever this view loses focus, either by losing window focus or by losing 5914 * focus within its window. This method can be used to clear any state tied to the 5915 * focus. For instance, if a button is held pressed with the trackball and the window 5916 * loses focus, this method can be used to cancel the press. 5917 * 5918 * Subclasses of View overriding this method should always call super.onFocusLost(). 5919 * 5920 * @see #onFocusChanged(boolean, int, android.graphics.Rect) 5921 * @see #onWindowFocusChanged(boolean) 5922 * 5923 * @hide pending API council approval 5924 */ 5925 protected void onFocusLost() { 5926 resetPressedState(); 5927 } 5928 5929 private void resetPressedState() { 5930 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 5931 return; 5932 } 5933 5934 if (isPressed()) { 5935 setPressed(false); 5936 5937 if (!mHasPerformedLongPress) { 5938 removeLongPressCallback(); 5939 } 5940 } 5941 } 5942 5943 /** 5944 * Returns true if this view has focus 5945 * 5946 * @return True if this view has focus, false otherwise. 5947 */ 5948 @ViewDebug.ExportedProperty(category = "focus") 5949 public boolean isFocused() { 5950 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 5951 } 5952 5953 /** 5954 * Find the view in the hierarchy rooted at this view that currently has 5955 * focus. 5956 * 5957 * @return The view that currently has focus, or null if no focused view can 5958 * be found. 5959 */ 5960 public View findFocus() { 5961 return (mPrivateFlags & PFLAG_FOCUSED) != 0 ? this : null; 5962 } 5963 5964 /** 5965 * Indicates whether this view is one of the set of scrollable containers in 5966 * its window. 5967 * 5968 * @return whether this view is one of the set of scrollable containers in 5969 * its window 5970 * 5971 * @attr ref android.R.styleable#View_isScrollContainer 5972 */ 5973 public boolean isScrollContainer() { 5974 return (mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0; 5975 } 5976 5977 /** 5978 * Change whether this view is one of the set of scrollable containers in 5979 * its window. This will be used to determine whether the window can 5980 * resize or must pan when a soft input area is open -- scrollable 5981 * containers allow the window to use resize mode since the container 5982 * will appropriately shrink. 5983 * 5984 * @attr ref android.R.styleable#View_isScrollContainer 5985 */ 5986 public void setScrollContainer(boolean isScrollContainer) { 5987 if (isScrollContainer) { 5988 if (mAttachInfo != null && (mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) == 0) { 5989 mAttachInfo.mScrollContainers.add(this); 5990 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 5991 } 5992 mPrivateFlags |= PFLAG_SCROLL_CONTAINER; 5993 } else { 5994 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 5995 mAttachInfo.mScrollContainers.remove(this); 5996 } 5997 mPrivateFlags &= ~(PFLAG_SCROLL_CONTAINER|PFLAG_SCROLL_CONTAINER_ADDED); 5998 } 5999 } 6000 6001 /** 6002 * Returns the quality of the drawing cache. 6003 * 6004 * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 6005 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 6006 * 6007 * @see #setDrawingCacheQuality(int) 6008 * @see #setDrawingCacheEnabled(boolean) 6009 * @see #isDrawingCacheEnabled() 6010 * 6011 * @attr ref android.R.styleable#View_drawingCacheQuality 6012 */ 6013 @DrawingCacheQuality 6014 public int getDrawingCacheQuality() { 6015 return mViewFlags & DRAWING_CACHE_QUALITY_MASK; 6016 } 6017 6018 /** 6019 * Set the drawing cache quality of this view. This value is used only when the 6020 * drawing cache is enabled 6021 * 6022 * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 6023 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 6024 * 6025 * @see #getDrawingCacheQuality() 6026 * @see #setDrawingCacheEnabled(boolean) 6027 * @see #isDrawingCacheEnabled() 6028 * 6029 * @attr ref android.R.styleable#View_drawingCacheQuality 6030 */ 6031 public void setDrawingCacheQuality(@DrawingCacheQuality int quality) { 6032 setFlags(quality, DRAWING_CACHE_QUALITY_MASK); 6033 } 6034 6035 /** 6036 * Returns whether the screen should remain on, corresponding to the current 6037 * value of {@link #KEEP_SCREEN_ON}. 6038 * 6039 * @return Returns true if {@link #KEEP_SCREEN_ON} is set. 6040 * 6041 * @see #setKeepScreenOn(boolean) 6042 * 6043 * @attr ref android.R.styleable#View_keepScreenOn 6044 */ 6045 public boolean getKeepScreenOn() { 6046 return (mViewFlags & KEEP_SCREEN_ON) != 0; 6047 } 6048 6049 /** 6050 * Controls whether the screen should remain on, modifying the 6051 * value of {@link #KEEP_SCREEN_ON}. 6052 * 6053 * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. 6054 * 6055 * @see #getKeepScreenOn() 6056 * 6057 * @attr ref android.R.styleable#View_keepScreenOn 6058 */ 6059 public void setKeepScreenOn(boolean keepScreenOn) { 6060 setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); 6061 } 6062 6063 /** 6064 * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 6065 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6066 * 6067 * @attr ref android.R.styleable#View_nextFocusLeft 6068 */ 6069 public int getNextFocusLeftId() { 6070 return mNextFocusLeftId; 6071 } 6072 6073 /** 6074 * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 6075 * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should 6076 * decide automatically. 6077 * 6078 * @attr ref android.R.styleable#View_nextFocusLeft 6079 */ 6080 public void setNextFocusLeftId(int nextFocusLeftId) { 6081 mNextFocusLeftId = nextFocusLeftId; 6082 } 6083 6084 /** 6085 * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 6086 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6087 * 6088 * @attr ref android.R.styleable#View_nextFocusRight 6089 */ 6090 public int getNextFocusRightId() { 6091 return mNextFocusRightId; 6092 } 6093 6094 /** 6095 * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 6096 * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should 6097 * decide automatically. 6098 * 6099 * @attr ref android.R.styleable#View_nextFocusRight 6100 */ 6101 public void setNextFocusRightId(int nextFocusRightId) { 6102 mNextFocusRightId = nextFocusRightId; 6103 } 6104 6105 /** 6106 * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. 6107 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6108 * 6109 * @attr ref android.R.styleable#View_nextFocusUp 6110 */ 6111 public int getNextFocusUpId() { 6112 return mNextFocusUpId; 6113 } 6114 6115 /** 6116 * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. 6117 * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should 6118 * decide automatically. 6119 * 6120 * @attr ref android.R.styleable#View_nextFocusUp 6121 */ 6122 public void setNextFocusUpId(int nextFocusUpId) { 6123 mNextFocusUpId = nextFocusUpId; 6124 } 6125 6126 /** 6127 * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 6128 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6129 * 6130 * @attr ref android.R.styleable#View_nextFocusDown 6131 */ 6132 public int getNextFocusDownId() { 6133 return mNextFocusDownId; 6134 } 6135 6136 /** 6137 * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 6138 * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should 6139 * decide automatically. 6140 * 6141 * @attr ref android.R.styleable#View_nextFocusDown 6142 */ 6143 public void setNextFocusDownId(int nextFocusDownId) { 6144 mNextFocusDownId = nextFocusDownId; 6145 } 6146 6147 /** 6148 * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 6149 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6150 * 6151 * @attr ref android.R.styleable#View_nextFocusForward 6152 */ 6153 public int getNextFocusForwardId() { 6154 return mNextFocusForwardId; 6155 } 6156 6157 /** 6158 * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 6159 * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should 6160 * decide automatically. 6161 * 6162 * @attr ref android.R.styleable#View_nextFocusForward 6163 */ 6164 public void setNextFocusForwardId(int nextFocusForwardId) { 6165 mNextFocusForwardId = nextFocusForwardId; 6166 } 6167 6168 /** 6169 * Returns the visibility of this view and all of its ancestors 6170 * 6171 * @return True if this view and all of its ancestors are {@link #VISIBLE} 6172 */ 6173 public boolean isShown() { 6174 View current = this; 6175 //noinspection ConstantConditions 6176 do { 6177 if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { 6178 return false; 6179 } 6180 ViewParent parent = current.mParent; 6181 if (parent == null) { 6182 return false; // We are not attached to the view root 6183 } 6184 if (!(parent instanceof View)) { 6185 return true; 6186 } 6187 current = (View) parent; 6188 } while (current != null); 6189 6190 return false; 6191 } 6192 6193 /** 6194 * Called by the view hierarchy when the content insets for a window have 6195 * changed, to allow it to adjust its content to fit within those windows. 6196 * The content insets tell you the space that the status bar, input method, 6197 * and other system windows infringe on the application's window. 6198 * 6199 * <p>You do not normally need to deal with this function, since the default 6200 * window decoration given to applications takes care of applying it to the 6201 * content of the window. If you use {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 6202 * or {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} this will not be the case, 6203 * and your content can be placed under those system elements. You can then 6204 * use this method within your view hierarchy if you have parts of your UI 6205 * which you would like to ensure are not being covered. 6206 * 6207 * <p>The default implementation of this method simply applies the content 6208 * insets to the view's padding, consuming that content (modifying the 6209 * insets to be 0), and returning true. This behavior is off by default, but can 6210 * be enabled through {@link #setFitsSystemWindows(boolean)}. 6211 * 6212 * <p>This function's traversal down the hierarchy is depth-first. The same content 6213 * insets object is propagated down the hierarchy, so any changes made to it will 6214 * be seen by all following views (including potentially ones above in 6215 * the hierarchy since this is a depth-first traversal). The first view 6216 * that returns true will abort the entire traversal. 6217 * 6218 * <p>The default implementation works well for a situation where it is 6219 * used with a container that covers the entire window, allowing it to 6220 * apply the appropriate insets to its content on all edges. If you need 6221 * a more complicated layout (such as two different views fitting system 6222 * windows, one on the top of the window, and one on the bottom), 6223 * you can override the method and handle the insets however you would like. 6224 * Note that the insets provided by the framework are always relative to the 6225 * far edges of the window, not accounting for the location of the called view 6226 * within that window. (In fact when this method is called you do not yet know 6227 * where the layout will place the view, as it is done before layout happens.) 6228 * 6229 * <p>Note: unlike many View methods, there is no dispatch phase to this 6230 * call. If you are overriding it in a ViewGroup and want to allow the 6231 * call to continue to your children, you must be sure to call the super 6232 * implementation. 6233 * 6234 * <p>Here is a sample layout that makes use of fitting system windows 6235 * to have controls for a video view placed inside of the window decorations 6236 * that it hides and shows. This can be used with code like the second 6237 * sample (video player) shown in {@link #setSystemUiVisibility(int)}. 6238 * 6239 * {@sample development/samples/ApiDemos/res/layout/video_player.xml complete} 6240 * 6241 * @param insets Current content insets of the window. Prior to 6242 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN} you must not modify 6243 * the insets or else you and Android will be unhappy. 6244 * 6245 * @return {@code true} if this view applied the insets and it should not 6246 * continue propagating further down the hierarchy, {@code false} otherwise. 6247 * @see #getFitsSystemWindows() 6248 * @see #setFitsSystemWindows(boolean) 6249 * @see #setSystemUiVisibility(int) 6250 * 6251 * @deprecated As of API XX use {@link #dispatchApplyWindowInsets(WindowInsets)} to apply 6252 * insets to views. Views should override {@link #onApplyWindowInsets(WindowInsets)} or use 6253 * {@link #setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)} 6254 * to implement handling their own insets. 6255 */ 6256 protected boolean fitSystemWindows(Rect insets) { 6257 if ((mPrivateFlags3 & PFLAG3_APPLYING_INSETS) == 0) { 6258 if (insets == null) { 6259 // Null insets by definition have already been consumed. 6260 // This call cannot apply insets since there are none to apply, 6261 // so return false. 6262 return false; 6263 } 6264 // If we're not in the process of dispatching the newer apply insets call, 6265 // that means we're not in the compatibility path. Dispatch into the newer 6266 // apply insets path and take things from there. 6267 try { 6268 mPrivateFlags3 |= PFLAG3_FITTING_SYSTEM_WINDOWS; 6269 return dispatchApplyWindowInsets(new WindowInsets(insets)).isConsumed(); 6270 } finally { 6271 mPrivateFlags3 &= ~PFLAG3_FITTING_SYSTEM_WINDOWS; 6272 } 6273 } else { 6274 // We're being called from the newer apply insets path. 6275 // Perform the standard fallback behavior. 6276 return fitSystemWindowsInt(insets); 6277 } 6278 } 6279 6280 private boolean fitSystemWindowsInt(Rect insets) { 6281 if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { 6282 mUserPaddingStart = UNDEFINED_PADDING; 6283 mUserPaddingEnd = UNDEFINED_PADDING; 6284 Rect localInsets = sThreadLocal.get(); 6285 if (localInsets == null) { 6286 localInsets = new Rect(); 6287 sThreadLocal.set(localInsets); 6288 } 6289 boolean res = computeFitSystemWindows(insets, localInsets); 6290 mUserPaddingLeftInitial = localInsets.left; 6291 mUserPaddingRightInitial = localInsets.right; 6292 internalSetPadding(localInsets.left, localInsets.top, 6293 localInsets.right, localInsets.bottom); 6294 return res; 6295 } 6296 return false; 6297 } 6298 6299 /** 6300 * Called when the view should apply {@link WindowInsets} according to its internal policy. 6301 * 6302 * <p>This method should be overridden by views that wish to apply a policy different from or 6303 * in addition to the default behavior. Clients that wish to force a view subtree 6304 * to apply insets should call {@link #dispatchApplyWindowInsets(WindowInsets)}.</p> 6305 * 6306 * <p>Clients may supply an {@link OnApplyWindowInsetsListener} to a view. If one is set 6307 * it will be called during dispatch instead of this method. The listener may optionally 6308 * call this method from its own implementation if it wishes to apply the view's default 6309 * insets policy in addition to its own.</p> 6310 * 6311 * <p>Implementations of this method should either return the insets parameter unchanged 6312 * or a new {@link WindowInsets} cloned from the supplied insets with any insets consumed 6313 * that this view applied itself. This allows new inset types added in future platform 6314 * versions to pass through existing implementations unchanged without being erroneously 6315 * consumed.</p> 6316 * 6317 * <p>By default if a view's {@link #setFitsSystemWindows(boolean) fitsSystemWindows} 6318 * property is set then the view will consume the system window insets and apply them 6319 * as padding for the view.</p> 6320 * 6321 * @param insets Insets to apply 6322 * @return The supplied insets with any applied insets consumed 6323 */ 6324 public WindowInsets onApplyWindowInsets(WindowInsets insets) { 6325 if ((mPrivateFlags3 & PFLAG3_FITTING_SYSTEM_WINDOWS) == 0) { 6326 // We weren't called from within a direct call to fitSystemWindows, 6327 // call into it as a fallback in case we're in a class that overrides it 6328 // and has logic to perform. 6329 if (fitSystemWindows(insets.getSystemWindowInsets())) { 6330 return insets.consumeSystemWindowInsets(); 6331 } 6332 } else { 6333 // We were called from within a direct call to fitSystemWindows. 6334 if (fitSystemWindowsInt(insets.getSystemWindowInsets())) { 6335 return insets.consumeSystemWindowInsets(); 6336 } 6337 } 6338 return insets; 6339 } 6340 6341 /** 6342 * Set an {@link OnApplyWindowInsetsListener} to take over the policy for applying 6343 * window insets to this view. The listener's 6344 * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} 6345 * method will be called instead of the view's 6346 * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. 6347 * 6348 * @param listener Listener to set 6349 * 6350 * @see #onApplyWindowInsets(WindowInsets) 6351 */ 6352 public void setOnApplyWindowInsetsListener(OnApplyWindowInsetsListener listener) { 6353 getListenerInfo().mOnApplyWindowInsetsListener = listener; 6354 } 6355 6356 /** 6357 * Request to apply the given window insets to this view or another view in its subtree. 6358 * 6359 * <p>This method should be called by clients wishing to apply insets corresponding to areas 6360 * obscured by window decorations or overlays. This can include the status and navigation bars, 6361 * action bars, input methods and more. New inset categories may be added in the future. 6362 * The method returns the insets provided minus any that were applied by this view or its 6363 * children.</p> 6364 * 6365 * <p>Clients wishing to provide custom behavior should override the 6366 * {@link #onApplyWindowInsets(WindowInsets)} method or alternatively provide a 6367 * {@link OnApplyWindowInsetsListener} via the 6368 * {@link #setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) setOnApplyWindowInsetsListener} 6369 * method.</p> 6370 * 6371 * <p>This method replaces the older {@link #fitSystemWindows(Rect) fitSystemWindows} method. 6372 * </p> 6373 * 6374 * @param insets Insets to apply 6375 * @return The provided insets minus the insets that were consumed 6376 */ 6377 public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { 6378 try { 6379 mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; 6380 if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { 6381 return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); 6382 } else { 6383 return onApplyWindowInsets(insets); 6384 } 6385 } finally { 6386 mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; 6387 } 6388 } 6389 6390 /** 6391 * @hide Compute the insets that should be consumed by this view and the ones 6392 * that should propagate to those under it. 6393 */ 6394 protected boolean computeFitSystemWindows(Rect inoutInsets, Rect outLocalInsets) { 6395 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 6396 || mAttachInfo == null 6397 || ((mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0 6398 && !mAttachInfo.mOverscanRequested)) { 6399 outLocalInsets.set(inoutInsets); 6400 inoutInsets.set(0, 0, 0, 0); 6401 return true; 6402 } else { 6403 // The application wants to take care of fitting system window for 6404 // the content... however we still need to take care of any overscan here. 6405 final Rect overscan = mAttachInfo.mOverscanInsets; 6406 outLocalInsets.set(overscan); 6407 inoutInsets.left -= overscan.left; 6408 inoutInsets.top -= overscan.top; 6409 inoutInsets.right -= overscan.right; 6410 inoutInsets.bottom -= overscan.bottom; 6411 return false; 6412 } 6413 } 6414 6415 /** 6416 * Sets whether or not this view should account for system screen decorations 6417 * such as the status bar and inset its content; that is, controlling whether 6418 * the default implementation of {@link #fitSystemWindows(Rect)} will be 6419 * executed. See that method for more details. 6420 * 6421 * <p>Note that if you are providing your own implementation of 6422 * {@link #fitSystemWindows(Rect)}, then there is no need to set this 6423 * flag to true -- your implementation will be overriding the default 6424 * implementation that checks this flag. 6425 * 6426 * @param fitSystemWindows If true, then the default implementation of 6427 * {@link #fitSystemWindows(Rect)} will be executed. 6428 * 6429 * @attr ref android.R.styleable#View_fitsSystemWindows 6430 * @see #getFitsSystemWindows() 6431 * @see #fitSystemWindows(Rect) 6432 * @see #setSystemUiVisibility(int) 6433 */ 6434 public void setFitsSystemWindows(boolean fitSystemWindows) { 6435 setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); 6436 } 6437 6438 /** 6439 * Check for state of {@link #setFitsSystemWindows(boolean)}. If this method 6440 * returns {@code true}, the default implementation of {@link #fitSystemWindows(Rect)} 6441 * will be executed. 6442 * 6443 * @return {@code true} if the default implementation of 6444 * {@link #fitSystemWindows(Rect)} will be executed. 6445 * 6446 * @attr ref android.R.styleable#View_fitsSystemWindows 6447 * @see #setFitsSystemWindows(boolean) 6448 * @see #fitSystemWindows(Rect) 6449 * @see #setSystemUiVisibility(int) 6450 */ 6451 public boolean getFitsSystemWindows() { 6452 return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; 6453 } 6454 6455 /** @hide */ 6456 public boolean fitsSystemWindows() { 6457 return getFitsSystemWindows(); 6458 } 6459 6460 /** 6461 * Ask that a new dispatch of {@link #fitSystemWindows(Rect)} be performed. 6462 * @deprecated Use {@link #requestApplyInsets()} for newer platform versions. 6463 */ 6464 public void requestFitSystemWindows() { 6465 if (mParent != null) { 6466 mParent.requestFitSystemWindows(); 6467 } 6468 } 6469 6470 /** 6471 * Ask that a new dispatch of {@link #onApplyWindowInsets(WindowInsets)} be performed. 6472 */ 6473 public void requestApplyInsets() { 6474 requestFitSystemWindows(); 6475 } 6476 6477 /** 6478 * For use by PhoneWindow to make its own system window fitting optional. 6479 * @hide 6480 */ 6481 public void makeOptionalFitsSystemWindows() { 6482 setFlags(OPTIONAL_FITS_SYSTEM_WINDOWS, OPTIONAL_FITS_SYSTEM_WINDOWS); 6483 } 6484 6485 /** 6486 * Returns the visibility status for this view. 6487 * 6488 * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 6489 * @attr ref android.R.styleable#View_visibility 6490 */ 6491 @ViewDebug.ExportedProperty(mapping = { 6492 @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), 6493 @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), 6494 @ViewDebug.IntToString(from = GONE, to = "GONE") 6495 }) 6496 @Visibility 6497 public int getVisibility() { 6498 return mViewFlags & VISIBILITY_MASK; 6499 } 6500 6501 /** 6502 * Set the enabled state of this view. 6503 * 6504 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 6505 * @attr ref android.R.styleable#View_visibility 6506 */ 6507 @RemotableViewMethod 6508 public void setVisibility(@Visibility int visibility) { 6509 setFlags(visibility, VISIBILITY_MASK); 6510 if (mBackground != null) mBackground.setVisible(visibility == VISIBLE, false); 6511 } 6512 6513 /** 6514 * Returns the enabled status for this view. The interpretation of the 6515 * enabled state varies by subclass. 6516 * 6517 * @return True if this view is enabled, false otherwise. 6518 */ 6519 @ViewDebug.ExportedProperty 6520 public boolean isEnabled() { 6521 return (mViewFlags & ENABLED_MASK) == ENABLED; 6522 } 6523 6524 /** 6525 * Set the enabled state of this view. The interpretation of the enabled 6526 * state varies by subclass. 6527 * 6528 * @param enabled True if this view is enabled, false otherwise. 6529 */ 6530 @RemotableViewMethod 6531 public void setEnabled(boolean enabled) { 6532 if (enabled == isEnabled()) return; 6533 6534 setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); 6535 6536 /* 6537 * The View most likely has to change its appearance, so refresh 6538 * the drawable state. 6539 */ 6540 refreshDrawableState(); 6541 6542 // Invalidate too, since the default behavior for views is to be 6543 // be drawn at 50% alpha rather than to change the drawable. 6544 invalidate(true); 6545 6546 if (!enabled) { 6547 cancelPendingInputEvents(); 6548 } 6549 } 6550 6551 /** 6552 * Set whether this view can receive the focus. 6553 * 6554 * Setting this to false will also ensure that this view is not focusable 6555 * in touch mode. 6556 * 6557 * @param focusable If true, this view can receive the focus. 6558 * 6559 * @see #setFocusableInTouchMode(boolean) 6560 * @attr ref android.R.styleable#View_focusable 6561 */ 6562 public void setFocusable(boolean focusable) { 6563 if (!focusable) { 6564 setFlags(0, FOCUSABLE_IN_TOUCH_MODE); 6565 } 6566 setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); 6567 } 6568 6569 /** 6570 * Set whether this view can receive focus while in touch mode. 6571 * 6572 * Setting this to true will also ensure that this view is focusable. 6573 * 6574 * @param focusableInTouchMode If true, this view can receive the focus while 6575 * in touch mode. 6576 * 6577 * @see #setFocusable(boolean) 6578 * @attr ref android.R.styleable#View_focusableInTouchMode 6579 */ 6580 public void setFocusableInTouchMode(boolean focusableInTouchMode) { 6581 // Focusable in touch mode should always be set before the focusable flag 6582 // otherwise, setting the focusable flag will trigger a focusableViewAvailable() 6583 // which, in touch mode, will not successfully request focus on this view 6584 // because the focusable in touch mode flag is not set 6585 setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); 6586 if (focusableInTouchMode) { 6587 setFlags(FOCUSABLE, FOCUSABLE_MASK); 6588 } 6589 } 6590 6591 /** 6592 * Set whether this view should have sound effects enabled for events such as 6593 * clicking and touching. 6594 * 6595 * <p>You may wish to disable sound effects for a view if you already play sounds, 6596 * for instance, a dial key that plays dtmf tones. 6597 * 6598 * @param soundEffectsEnabled whether sound effects are enabled for this view. 6599 * @see #isSoundEffectsEnabled() 6600 * @see #playSoundEffect(int) 6601 * @attr ref android.R.styleable#View_soundEffectsEnabled 6602 */ 6603 public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { 6604 setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); 6605 } 6606 6607 /** 6608 * @return whether this view should have sound effects enabled for events such as 6609 * clicking and touching. 6610 * 6611 * @see #setSoundEffectsEnabled(boolean) 6612 * @see #playSoundEffect(int) 6613 * @attr ref android.R.styleable#View_soundEffectsEnabled 6614 */ 6615 @ViewDebug.ExportedProperty 6616 public boolean isSoundEffectsEnabled() { 6617 return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); 6618 } 6619 6620 /** 6621 * Set whether this view should have haptic feedback for events such as 6622 * long presses. 6623 * 6624 * <p>You may wish to disable haptic feedback if your view already controls 6625 * its own haptic feedback. 6626 * 6627 * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. 6628 * @see #isHapticFeedbackEnabled() 6629 * @see #performHapticFeedback(int) 6630 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 6631 */ 6632 public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { 6633 setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); 6634 } 6635 6636 /** 6637 * @return whether this view should have haptic feedback enabled for events 6638 * long presses. 6639 * 6640 * @see #setHapticFeedbackEnabled(boolean) 6641 * @see #performHapticFeedback(int) 6642 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 6643 */ 6644 @ViewDebug.ExportedProperty 6645 public boolean isHapticFeedbackEnabled() { 6646 return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); 6647 } 6648 6649 /** 6650 * Returns the layout direction for this view. 6651 * 6652 * @return One of {@link #LAYOUT_DIRECTION_LTR}, 6653 * {@link #LAYOUT_DIRECTION_RTL}, 6654 * {@link #LAYOUT_DIRECTION_INHERIT} or 6655 * {@link #LAYOUT_DIRECTION_LOCALE}. 6656 * 6657 * @attr ref android.R.styleable#View_layoutDirection 6658 * 6659 * @hide 6660 */ 6661 @ViewDebug.ExportedProperty(category = "layout", mapping = { 6662 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), 6663 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), 6664 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), 6665 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") 6666 }) 6667 @LayoutDir 6668 public int getRawLayoutDirection() { 6669 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 6670 } 6671 6672 /** 6673 * Set the layout direction for this view. This will propagate a reset of layout direction 6674 * resolution to the view's children and resolve layout direction for this view. 6675 * 6676 * @param layoutDirection the layout direction to set. Should be one of: 6677 * 6678 * {@link #LAYOUT_DIRECTION_LTR}, 6679 * {@link #LAYOUT_DIRECTION_RTL}, 6680 * {@link #LAYOUT_DIRECTION_INHERIT}, 6681 * {@link #LAYOUT_DIRECTION_LOCALE}. 6682 * 6683 * Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution 6684 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 6685 * will return the default {@link #LAYOUT_DIRECTION_LTR}. 6686 * 6687 * @attr ref android.R.styleable#View_layoutDirection 6688 */ 6689 @RemotableViewMethod 6690 public void setLayoutDirection(@LayoutDir int layoutDirection) { 6691 if (getRawLayoutDirection() != layoutDirection) { 6692 // Reset the current layout direction and the resolved one 6693 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_MASK; 6694 resetRtlProperties(); 6695 // Set the new layout direction (filtered) 6696 mPrivateFlags2 |= 6697 ((layoutDirection << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) & PFLAG2_LAYOUT_DIRECTION_MASK); 6698 // We need to resolve all RTL properties as they all depend on layout direction 6699 resolveRtlPropertiesIfNeeded(); 6700 requestLayout(); 6701 invalidate(true); 6702 } 6703 } 6704 6705 /** 6706 * Returns the resolved layout direction for this view. 6707 * 6708 * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns 6709 * {@link #LAYOUT_DIRECTION_LTR} if the layout direction is not RTL. 6710 * 6711 * For compatibility, this will return {@link #LAYOUT_DIRECTION_LTR} if API version 6712 * is lower than {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}. 6713 * 6714 * @attr ref android.R.styleable#View_layoutDirection 6715 */ 6716 @ViewDebug.ExportedProperty(category = "layout", mapping = { 6717 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), 6718 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") 6719 }) 6720 @ResolvedLayoutDir 6721 public int getLayoutDirection() { 6722 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 6723 if (targetSdkVersion < JELLY_BEAN_MR1) { 6724 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 6725 return LAYOUT_DIRECTION_RESOLVED_DEFAULT; 6726 } 6727 return ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) == 6728 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) ? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; 6729 } 6730 6731 /** 6732 * Indicates whether or not this view's layout is right-to-left. This is resolved from 6733 * layout attribute and/or the inherited value from the parent 6734 * 6735 * @return true if the layout is right-to-left. 6736 * 6737 * @hide 6738 */ 6739 @ViewDebug.ExportedProperty(category = "layout") 6740 public boolean isLayoutRtl() { 6741 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 6742 } 6743 6744 /** 6745 * Indicates whether the view is currently tracking transient state that the 6746 * app should not need to concern itself with saving and restoring, but that 6747 * the framework should take special note to preserve when possible. 6748 * 6749 * <p>A view with transient state cannot be trivially rebound from an external 6750 * data source, such as an adapter binding item views in a list. This may be 6751 * because the view is performing an animation, tracking user selection 6752 * of content, or similar.</p> 6753 * 6754 * @return true if the view has transient state 6755 */ 6756 @ViewDebug.ExportedProperty(category = "layout") 6757 public boolean hasTransientState() { 6758 return (mPrivateFlags2 & PFLAG2_HAS_TRANSIENT_STATE) == PFLAG2_HAS_TRANSIENT_STATE; 6759 } 6760 6761 /** 6762 * Set whether this view is currently tracking transient state that the 6763 * framework should attempt to preserve when possible. This flag is reference counted, 6764 * so every call to setHasTransientState(true) should be paired with a later call 6765 * to setHasTransientState(false). 6766 * 6767 * <p>A view with transient state cannot be trivially rebound from an external 6768 * data source, such as an adapter binding item views in a list. This may be 6769 * because the view is performing an animation, tracking user selection 6770 * of content, or similar.</p> 6771 * 6772 * @param hasTransientState true if this view has transient state 6773 */ 6774 public void setHasTransientState(boolean hasTransientState) { 6775 mTransientStateCount = hasTransientState ? mTransientStateCount + 1 : 6776 mTransientStateCount - 1; 6777 if (mTransientStateCount < 0) { 6778 mTransientStateCount = 0; 6779 Log.e(VIEW_LOG_TAG, "hasTransientState decremented below 0: " + 6780 "unmatched pair of setHasTransientState calls"); 6781 } else if ((hasTransientState && mTransientStateCount == 1) || 6782 (!hasTransientState && mTransientStateCount == 0)) { 6783 // update flag if we've just incremented up from 0 or decremented down to 0 6784 mPrivateFlags2 = (mPrivateFlags2 & ~PFLAG2_HAS_TRANSIENT_STATE) | 6785 (hasTransientState ? PFLAG2_HAS_TRANSIENT_STATE : 0); 6786 if (mParent != null) { 6787 try { 6788 mParent.childHasTransientStateChanged(this, hasTransientState); 6789 } catch (AbstractMethodError e) { 6790 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 6791 " does not fully implement ViewParent", e); 6792 } 6793 } 6794 } 6795 } 6796 6797 /** 6798 * Returns true if this view is currently attached to a window. 6799 */ 6800 public boolean isAttachedToWindow() { 6801 return mAttachInfo != null; 6802 } 6803 6804 /** 6805 * Returns true if this view has been through at least one layout since it 6806 * was last attached to or detached from a window. 6807 */ 6808 public boolean isLaidOut() { 6809 return (mPrivateFlags3 & PFLAG3_IS_LAID_OUT) == PFLAG3_IS_LAID_OUT; 6810 } 6811 6812 /** 6813 * If this view doesn't do any drawing on its own, set this flag to 6814 * allow further optimizations. By default, this flag is not set on 6815 * View, but could be set on some View subclasses such as ViewGroup. 6816 * 6817 * Typically, if you override {@link #onDraw(android.graphics.Canvas)} 6818 * you should clear this flag. 6819 * 6820 * @param willNotDraw whether or not this View draw on its own 6821 */ 6822 public void setWillNotDraw(boolean willNotDraw) { 6823 setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); 6824 } 6825 6826 /** 6827 * Returns whether or not this View draws on its own. 6828 * 6829 * @return true if this view has nothing to draw, false otherwise 6830 */ 6831 @ViewDebug.ExportedProperty(category = "drawing") 6832 public boolean willNotDraw() { 6833 return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; 6834 } 6835 6836 /** 6837 * When a View's drawing cache is enabled, drawing is redirected to an 6838 * offscreen bitmap. Some views, like an ImageView, must be able to 6839 * bypass this mechanism if they already draw a single bitmap, to avoid 6840 * unnecessary usage of the memory. 6841 * 6842 * @param willNotCacheDrawing true if this view does not cache its 6843 * drawing, false otherwise 6844 */ 6845 public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { 6846 setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); 6847 } 6848 6849 /** 6850 * Returns whether or not this View can cache its drawing or not. 6851 * 6852 * @return true if this view does not cache its drawing, false otherwise 6853 */ 6854 @ViewDebug.ExportedProperty(category = "drawing") 6855 public boolean willNotCacheDrawing() { 6856 return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; 6857 } 6858 6859 /** 6860 * Indicates whether this view reacts to click events or not. 6861 * 6862 * @return true if the view is clickable, false otherwise 6863 * 6864 * @see #setClickable(boolean) 6865 * @attr ref android.R.styleable#View_clickable 6866 */ 6867 @ViewDebug.ExportedProperty 6868 public boolean isClickable() { 6869 return (mViewFlags & CLICKABLE) == CLICKABLE; 6870 } 6871 6872 /** 6873 * Enables or disables click events for this view. When a view 6874 * is clickable it will change its state to "pressed" on every click. 6875 * Subclasses should set the view clickable to visually react to 6876 * user's clicks. 6877 * 6878 * @param clickable true to make the view clickable, false otherwise 6879 * 6880 * @see #isClickable() 6881 * @attr ref android.R.styleable#View_clickable 6882 */ 6883 public void setClickable(boolean clickable) { 6884 setFlags(clickable ? CLICKABLE : 0, CLICKABLE); 6885 } 6886 6887 /** 6888 * Indicates whether this view reacts to long click events or not. 6889 * 6890 * @return true if the view is long clickable, false otherwise 6891 * 6892 * @see #setLongClickable(boolean) 6893 * @attr ref android.R.styleable#View_longClickable 6894 */ 6895 public boolean isLongClickable() { 6896 return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 6897 } 6898 6899 /** 6900 * Enables or disables long click events for this view. When a view is long 6901 * clickable it reacts to the user holding down the button for a longer 6902 * duration than a tap. This event can either launch the listener or a 6903 * context menu. 6904 * 6905 * @param longClickable true to make the view long clickable, false otherwise 6906 * @see #isLongClickable() 6907 * @attr ref android.R.styleable#View_longClickable 6908 */ 6909 public void setLongClickable(boolean longClickable) { 6910 setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); 6911 } 6912 6913 /** 6914 * Sets the pressed state for this view and provides a touch coordinate for 6915 * animation hinting. 6916 * 6917 * @param pressed Pass true to set the View's internal state to "pressed", 6918 * or false to reverts the View's internal state from a 6919 * previously set "pressed" state. 6920 * @param x The x coordinate of the touch that caused the press 6921 * @param y The y coordinate of the touch that caused the press 6922 */ 6923 private void setPressed(boolean pressed, float x, float y) { 6924 if (pressed) { 6925 drawableHotspotChanged(x, y); 6926 } 6927 6928 setPressed(pressed); 6929 } 6930 6931 /** 6932 * Sets the pressed state for this view. 6933 * 6934 * @see #isClickable() 6935 * @see #setClickable(boolean) 6936 * 6937 * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts 6938 * the View's internal state from a previously set "pressed" state. 6939 */ 6940 public void setPressed(boolean pressed) { 6941 final boolean needsRefresh = pressed != ((mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED); 6942 6943 if (pressed) { 6944 mPrivateFlags |= PFLAG_PRESSED; 6945 } else { 6946 mPrivateFlags &= ~PFLAG_PRESSED; 6947 } 6948 6949 if (needsRefresh) { 6950 refreshDrawableState(); 6951 } 6952 dispatchSetPressed(pressed); 6953 } 6954 6955 /** 6956 * Dispatch setPressed to all of this View's children. 6957 * 6958 * @see #setPressed(boolean) 6959 * 6960 * @param pressed The new pressed state 6961 */ 6962 protected void dispatchSetPressed(boolean pressed) { 6963 } 6964 6965 /** 6966 * Indicates whether the view is currently in pressed state. Unless 6967 * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter 6968 * the pressed state. 6969 * 6970 * @see #setPressed(boolean) 6971 * @see #isClickable() 6972 * @see #setClickable(boolean) 6973 * 6974 * @return true if the view is currently pressed, false otherwise 6975 */ 6976 @ViewDebug.ExportedProperty 6977 public boolean isPressed() { 6978 return (mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED; 6979 } 6980 6981 /** 6982 * Indicates whether this view will save its state (that is, 6983 * whether its {@link #onSaveInstanceState} method will be called). 6984 * 6985 * @return Returns true if the view state saving is enabled, else false. 6986 * 6987 * @see #setSaveEnabled(boolean) 6988 * @attr ref android.R.styleable#View_saveEnabled 6989 */ 6990 public boolean isSaveEnabled() { 6991 return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; 6992 } 6993 6994 /** 6995 * Controls whether the saving of this view's state is 6996 * enabled (that is, whether its {@link #onSaveInstanceState} method 6997 * will be called). Note that even if freezing is enabled, the 6998 * view still must have an id assigned to it (via {@link #setId(int)}) 6999 * for its state to be saved. This flag can only disable the 7000 * saving of this view; any child views may still have their state saved. 7001 * 7002 * @param enabled Set to false to <em>disable</em> state saving, or true 7003 * (the default) to allow it. 7004 * 7005 * @see #isSaveEnabled() 7006 * @see #setId(int) 7007 * @see #onSaveInstanceState() 7008 * @attr ref android.R.styleable#View_saveEnabled 7009 */ 7010 public void setSaveEnabled(boolean enabled) { 7011 setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); 7012 } 7013 7014 /** 7015 * Gets whether the framework should discard touches when the view's 7016 * window is obscured by another visible window. 7017 * Refer to the {@link View} security documentation for more details. 7018 * 7019 * @return True if touch filtering is enabled. 7020 * 7021 * @see #setFilterTouchesWhenObscured(boolean) 7022 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 7023 */ 7024 @ViewDebug.ExportedProperty 7025 public boolean getFilterTouchesWhenObscured() { 7026 return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; 7027 } 7028 7029 /** 7030 * Sets whether the framework should discard touches when the view's 7031 * window is obscured by another visible window. 7032 * Refer to the {@link View} security documentation for more details. 7033 * 7034 * @param enabled True if touch filtering should be enabled. 7035 * 7036 * @see #getFilterTouchesWhenObscured 7037 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 7038 */ 7039 public void setFilterTouchesWhenObscured(boolean enabled) { 7040 setFlags(enabled ? FILTER_TOUCHES_WHEN_OBSCURED : 0, 7041 FILTER_TOUCHES_WHEN_OBSCURED); 7042 } 7043 7044 /** 7045 * Indicates whether the entire hierarchy under this view will save its 7046 * state when a state saving traversal occurs from its parent. The default 7047 * is true; if false, these views will not be saved unless 7048 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 7049 * 7050 * @return Returns true if the view state saving from parent is enabled, else false. 7051 * 7052 * @see #setSaveFromParentEnabled(boolean) 7053 */ 7054 public boolean isSaveFromParentEnabled() { 7055 return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; 7056 } 7057 7058 /** 7059 * Controls whether the entire hierarchy under this view will save its 7060 * state when a state saving traversal occurs from its parent. The default 7061 * is true; if false, these views will not be saved unless 7062 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 7063 * 7064 * @param enabled Set to false to <em>disable</em> state saving, or true 7065 * (the default) to allow it. 7066 * 7067 * @see #isSaveFromParentEnabled() 7068 * @see #setId(int) 7069 * @see #onSaveInstanceState() 7070 */ 7071 public void setSaveFromParentEnabled(boolean enabled) { 7072 setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); 7073 } 7074 7075 7076 /** 7077 * Returns whether this View is able to take focus. 7078 * 7079 * @return True if this view can take focus, or false otherwise. 7080 * @attr ref android.R.styleable#View_focusable 7081 */ 7082 @ViewDebug.ExportedProperty(category = "focus") 7083 public final boolean isFocusable() { 7084 return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); 7085 } 7086 7087 /** 7088 * When a view is focusable, it may not want to take focus when in touch mode. 7089 * For example, a button would like focus when the user is navigating via a D-pad 7090 * so that the user can click on it, but once the user starts touching the screen, 7091 * the button shouldn't take focus 7092 * @return Whether the view is focusable in touch mode. 7093 * @attr ref android.R.styleable#View_focusableInTouchMode 7094 */ 7095 @ViewDebug.ExportedProperty 7096 public final boolean isFocusableInTouchMode() { 7097 return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); 7098 } 7099 7100 /** 7101 * Find the nearest view in the specified direction that can take focus. 7102 * This does not actually give focus to that view. 7103 * 7104 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 7105 * 7106 * @return The nearest focusable in the specified direction, or null if none 7107 * can be found. 7108 */ 7109 public View focusSearch(@FocusRealDirection int direction) { 7110 if (mParent != null) { 7111 return mParent.focusSearch(this, direction); 7112 } else { 7113 return null; 7114 } 7115 } 7116 7117 /** 7118 * This method is the last chance for the focused view and its ancestors to 7119 * respond to an arrow key. This is called when the focused view did not 7120 * consume the key internally, nor could the view system find a new view in 7121 * the requested direction to give focus to. 7122 * 7123 * @param focused The currently focused view. 7124 * @param direction The direction focus wants to move. One of FOCUS_UP, 7125 * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. 7126 * @return True if the this view consumed this unhandled move. 7127 */ 7128 public boolean dispatchUnhandledMove(View focused, @FocusRealDirection int direction) { 7129 return false; 7130 } 7131 7132 /** 7133 * If a user manually specified the next view id for a particular direction, 7134 * use the root to look up the view. 7135 * @param root The root view of the hierarchy containing this view. 7136 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, 7137 * or FOCUS_BACKWARD. 7138 * @return The user specified next view, or null if there is none. 7139 */ 7140 View findUserSetNextFocus(View root, @FocusDirection int direction) { 7141 switch (direction) { 7142 case FOCUS_LEFT: 7143 if (mNextFocusLeftId == View.NO_ID) return null; 7144 return findViewInsideOutShouldExist(root, mNextFocusLeftId); 7145 case FOCUS_RIGHT: 7146 if (mNextFocusRightId == View.NO_ID) return null; 7147 return findViewInsideOutShouldExist(root, mNextFocusRightId); 7148 case FOCUS_UP: 7149 if (mNextFocusUpId == View.NO_ID) return null; 7150 return findViewInsideOutShouldExist(root, mNextFocusUpId); 7151 case FOCUS_DOWN: 7152 if (mNextFocusDownId == View.NO_ID) return null; 7153 return findViewInsideOutShouldExist(root, mNextFocusDownId); 7154 case FOCUS_FORWARD: 7155 if (mNextFocusForwardId == View.NO_ID) return null; 7156 return findViewInsideOutShouldExist(root, mNextFocusForwardId); 7157 case FOCUS_BACKWARD: { 7158 if (mID == View.NO_ID) return null; 7159 final int id = mID; 7160 return root.findViewByPredicateInsideOut(this, new Predicate<View>() { 7161 @Override 7162 public boolean apply(View t) { 7163 return t.mNextFocusForwardId == id; 7164 } 7165 }); 7166 } 7167 } 7168 return null; 7169 } 7170 7171 private View findViewInsideOutShouldExist(View root, int id) { 7172 if (mMatchIdPredicate == null) { 7173 mMatchIdPredicate = new MatchIdPredicate(); 7174 } 7175 mMatchIdPredicate.mId = id; 7176 View result = root.findViewByPredicateInsideOut(this, mMatchIdPredicate); 7177 if (result == null) { 7178 Log.w(VIEW_LOG_TAG, "couldn't find view with id " + id); 7179 } 7180 return result; 7181 } 7182 7183 /** 7184 * Find and return all focusable views that are descendants of this view, 7185 * possibly including this view if it is focusable itself. 7186 * 7187 * @param direction The direction of the focus 7188 * @return A list of focusable views 7189 */ 7190 public ArrayList<View> getFocusables(@FocusDirection int direction) { 7191 ArrayList<View> result = new ArrayList<View>(24); 7192 addFocusables(result, direction); 7193 return result; 7194 } 7195 7196 /** 7197 * Add any focusable views that are descendants of this view (possibly 7198 * including this view if it is focusable itself) to views. If we are in touch mode, 7199 * only add views that are also focusable in touch mode. 7200 * 7201 * @param views Focusable views found so far 7202 * @param direction The direction of the focus 7203 */ 7204 public void addFocusables(ArrayList<View> views, @FocusDirection int direction) { 7205 addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); 7206 } 7207 7208 /** 7209 * Adds any focusable views that are descendants of this view (possibly 7210 * including this view if it is focusable itself) to views. This method 7211 * adds all focusable views regardless if we are in touch mode or 7212 * only views focusable in touch mode if we are in touch mode or 7213 * only views that can take accessibility focus if accessibility is enabeld 7214 * depending on the focusable mode paramater. 7215 * 7216 * @param views Focusable views found so far or null if all we are interested is 7217 * the number of focusables. 7218 * @param direction The direction of the focus. 7219 * @param focusableMode The type of focusables to be added. 7220 * 7221 * @see #FOCUSABLES_ALL 7222 * @see #FOCUSABLES_TOUCH_MODE 7223 */ 7224 public void addFocusables(ArrayList<View> views, @FocusDirection int direction, 7225 @FocusableMode int focusableMode) { 7226 if (views == null) { 7227 return; 7228 } 7229 if (!isFocusable()) { 7230 return; 7231 } 7232 if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE 7233 && isInTouchMode() && !isFocusableInTouchMode()) { 7234 return; 7235 } 7236 views.add(this); 7237 } 7238 7239 /** 7240 * Finds the Views that contain given text. The containment is case insensitive. 7241 * The search is performed by either the text that the View renders or the content 7242 * description that describes the view for accessibility purposes and the view does 7243 * not render or both. Clients can specify how the search is to be performed via 7244 * passing the {@link #FIND_VIEWS_WITH_TEXT} and 7245 * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. 7246 * 7247 * @param outViews The output list of matching Views. 7248 * @param searched The text to match against. 7249 * 7250 * @see #FIND_VIEWS_WITH_TEXT 7251 * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION 7252 * @see #setContentDescription(CharSequence) 7253 */ 7254 public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, 7255 @FindViewFlags int flags) { 7256 if (getAccessibilityNodeProvider() != null) { 7257 if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { 7258 outViews.add(this); 7259 } 7260 } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 7261 && (searched != null && searched.length() > 0) 7262 && (mContentDescription != null && mContentDescription.length() > 0)) { 7263 String searchedLowerCase = searched.toString().toLowerCase(); 7264 String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); 7265 if (contentDescriptionLowerCase.contains(searchedLowerCase)) { 7266 outViews.add(this); 7267 } 7268 } 7269 } 7270 7271 /** 7272 * Find and return all touchable views that are descendants of this view, 7273 * possibly including this view if it is touchable itself. 7274 * 7275 * @return A list of touchable views 7276 */ 7277 public ArrayList<View> getTouchables() { 7278 ArrayList<View> result = new ArrayList<View>(); 7279 addTouchables(result); 7280 return result; 7281 } 7282 7283 /** 7284 * Add any touchable views that are descendants of this view (possibly 7285 * including this view if it is touchable itself) to views. 7286 * 7287 * @param views Touchable views found so far 7288 */ 7289 public void addTouchables(ArrayList<View> views) { 7290 final int viewFlags = mViewFlags; 7291 7292 if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) 7293 && (viewFlags & ENABLED_MASK) == ENABLED) { 7294 views.add(this); 7295 } 7296 } 7297 7298 /** 7299 * Returns whether this View is accessibility focused. 7300 * 7301 * @return True if this View is accessibility focused. 7302 */ 7303 public boolean isAccessibilityFocused() { 7304 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0; 7305 } 7306 7307 /** 7308 * Call this to try to give accessibility focus to this view. 7309 * 7310 * A view will not actually take focus if {@link AccessibilityManager#isEnabled()} 7311 * returns false or the view is no visible or the view already has accessibility 7312 * focus. 7313 * 7314 * See also {@link #focusSearch(int)}, which is what you call to say that you 7315 * have focus, and you want your parent to look for the next one. 7316 * 7317 * @return Whether this view actually took accessibility focus. 7318 * 7319 * @hide 7320 */ 7321 public boolean requestAccessibilityFocus() { 7322 AccessibilityManager manager = AccessibilityManager.getInstance(mContext); 7323 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 7324 return false; 7325 } 7326 if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { 7327 return false; 7328 } 7329 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) == 0) { 7330 mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_FOCUSED; 7331 ViewRootImpl viewRootImpl = getViewRootImpl(); 7332 if (viewRootImpl != null) { 7333 viewRootImpl.setAccessibilityFocus(this, null); 7334 } 7335 invalidate(); 7336 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 7337 return true; 7338 } 7339 return false; 7340 } 7341 7342 /** 7343 * Call this to try to clear accessibility focus of this view. 7344 * 7345 * See also {@link #focusSearch(int)}, which is what you call to say that you 7346 * have focus, and you want your parent to look for the next one. 7347 * 7348 * @hide 7349 */ 7350 public void clearAccessibilityFocus() { 7351 clearAccessibilityFocusNoCallbacks(); 7352 // Clear the global reference of accessibility focus if this 7353 // view or any of its descendants had accessibility focus. 7354 ViewRootImpl viewRootImpl = getViewRootImpl(); 7355 if (viewRootImpl != null) { 7356 View focusHost = viewRootImpl.getAccessibilityFocusedHost(); 7357 if (focusHost != null && ViewRootImpl.isViewDescendantOf(focusHost, this)) { 7358 viewRootImpl.setAccessibilityFocus(null, null); 7359 } 7360 } 7361 } 7362 7363 private void sendAccessibilityHoverEvent(int eventType) { 7364 // Since we are not delivering to a client accessibility events from not 7365 // important views (unless the clinet request that) we need to fire the 7366 // event from the deepest view exposed to the client. As a consequence if 7367 // the user crosses a not exposed view the client will see enter and exit 7368 // of the exposed predecessor followed by and enter and exit of that same 7369 // predecessor when entering and exiting the not exposed descendant. This 7370 // is fine since the client has a clear idea which view is hovered at the 7371 // price of a couple more events being sent. This is a simple and 7372 // working solution. 7373 View source = this; 7374 while (true) { 7375 if (source.includeForAccessibility()) { 7376 source.sendAccessibilityEvent(eventType); 7377 return; 7378 } 7379 ViewParent parent = source.getParent(); 7380 if (parent instanceof View) { 7381 source = (View) parent; 7382 } else { 7383 return; 7384 } 7385 } 7386 } 7387 7388 /** 7389 * Clears accessibility focus without calling any callback methods 7390 * normally invoked in {@link #clearAccessibilityFocus()}. This method 7391 * is used for clearing accessibility focus when giving this focus to 7392 * another view. 7393 */ 7394 void clearAccessibilityFocusNoCallbacks() { 7395 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { 7396 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; 7397 invalidate(); 7398 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 7399 } 7400 } 7401 7402 /** 7403 * Call this to try to give focus to a specific view or to one of its 7404 * descendants. 7405 * 7406 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 7407 * false), or if it is focusable and it is not focusable in touch mode 7408 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 7409 * 7410 * See also {@link #focusSearch(int)}, which is what you call to say that you 7411 * have focus, and you want your parent to look for the next one. 7412 * 7413 * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments 7414 * {@link #FOCUS_DOWN} and <code>null</code>. 7415 * 7416 * @return Whether this view or one of its descendants actually took focus. 7417 */ 7418 public final boolean requestFocus() { 7419 return requestFocus(View.FOCUS_DOWN); 7420 } 7421 7422 /** 7423 * Call this to try to give focus to a specific view or to one of its 7424 * descendants and give it a hint about what direction focus is heading. 7425 * 7426 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 7427 * false), or if it is focusable and it is not focusable in touch mode 7428 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 7429 * 7430 * See also {@link #focusSearch(int)}, which is what you call to say that you 7431 * have focus, and you want your parent to look for the next one. 7432 * 7433 * This is equivalent to calling {@link #requestFocus(int, Rect)} with 7434 * <code>null</code> set for the previously focused rectangle. 7435 * 7436 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 7437 * @return Whether this view or one of its descendants actually took focus. 7438 */ 7439 public final boolean requestFocus(int direction) { 7440 return requestFocus(direction, null); 7441 } 7442 7443 /** 7444 * Call this to try to give focus to a specific view or to one of its descendants 7445 * and give it hints about the direction and a specific rectangle that the focus 7446 * is coming from. The rectangle can help give larger views a finer grained hint 7447 * about where focus is coming from, and therefore, where to show selection, or 7448 * forward focus change internally. 7449 * 7450 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 7451 * false), or if it is focusable and it is not focusable in touch mode 7452 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 7453 * 7454 * A View will not take focus if it is not visible. 7455 * 7456 * A View will not take focus if one of its parents has 7457 * {@link android.view.ViewGroup#getDescendantFocusability()} equal to 7458 * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. 7459 * 7460 * See also {@link #focusSearch(int)}, which is what you call to say that you 7461 * have focus, and you want your parent to look for the next one. 7462 * 7463 * You may wish to override this method if your custom {@link View} has an internal 7464 * {@link View} that it wishes to forward the request to. 7465 * 7466 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 7467 * @param previouslyFocusedRect The rectangle (in this View's coordinate system) 7468 * to give a finer grained hint about where focus is coming from. May be null 7469 * if there is no hint. 7470 * @return Whether this view or one of its descendants actually took focus. 7471 */ 7472 public boolean requestFocus(int direction, Rect previouslyFocusedRect) { 7473 return requestFocusNoSearch(direction, previouslyFocusedRect); 7474 } 7475 7476 private boolean requestFocusNoSearch(int direction, Rect previouslyFocusedRect) { 7477 // need to be focusable 7478 if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || 7479 (mViewFlags & VISIBILITY_MASK) != VISIBLE) { 7480 return false; 7481 } 7482 7483 // need to be focusable in touch mode if in touch mode 7484 if (isInTouchMode() && 7485 (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { 7486 return false; 7487 } 7488 7489 // need to not have any parents blocking us 7490 if (hasAncestorThatBlocksDescendantFocus()) { 7491 return false; 7492 } 7493 7494 handleFocusGainInternal(direction, previouslyFocusedRect); 7495 return true; 7496 } 7497 7498 /** 7499 * Call this to try to give focus to a specific view or to one of its descendants. This is a 7500 * special variant of {@link #requestFocus() } that will allow views that are not focuable in 7501 * touch mode to request focus when they are touched. 7502 * 7503 * @return Whether this view or one of its descendants actually took focus. 7504 * 7505 * @see #isInTouchMode() 7506 * 7507 */ 7508 public final boolean requestFocusFromTouch() { 7509 // Leave touch mode if we need to 7510 if (isInTouchMode()) { 7511 ViewRootImpl viewRoot = getViewRootImpl(); 7512 if (viewRoot != null) { 7513 viewRoot.ensureTouchMode(false); 7514 } 7515 } 7516 return requestFocus(View.FOCUS_DOWN); 7517 } 7518 7519 /** 7520 * @return Whether any ancestor of this view blocks descendant focus. 7521 */ 7522 private boolean hasAncestorThatBlocksDescendantFocus() { 7523 final boolean focusableInTouchMode = isFocusableInTouchMode(); 7524 ViewParent ancestor = mParent; 7525 while (ancestor instanceof ViewGroup) { 7526 final ViewGroup vgAncestor = (ViewGroup) ancestor; 7527 if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS 7528 || (!focusableInTouchMode && vgAncestor.shouldBlockFocusForTouchscreen())) { 7529 return true; 7530 } else { 7531 ancestor = vgAncestor.getParent(); 7532 } 7533 } 7534 return false; 7535 } 7536 7537 /** 7538 * Gets the mode for determining whether this View is important for accessibility 7539 * which is if it fires accessibility events and if it is reported to 7540 * accessibility services that query the screen. 7541 * 7542 * @return The mode for determining whether a View is important for accessibility. 7543 * 7544 * @attr ref android.R.styleable#View_importantForAccessibility 7545 * 7546 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 7547 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 7548 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 7549 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 7550 */ 7551 @ViewDebug.ExportedProperty(category = "accessibility", mapping = { 7552 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"), 7553 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"), 7554 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no"), 7555 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, 7556 to = "noHideDescendants") 7557 }) 7558 public int getImportantForAccessibility() { 7559 return (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 7560 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 7561 } 7562 7563 /** 7564 * Sets the live region mode for this view. This indicates to accessibility 7565 * services whether they should automatically notify the user about changes 7566 * to the view's content description or text, or to the content descriptions 7567 * or text of the view's children (where applicable). 7568 * <p> 7569 * For example, in a login screen with a TextView that displays an "incorrect 7570 * password" notification, that view should be marked as a live region with 7571 * mode {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 7572 * <p> 7573 * To disable change notifications for this view, use 7574 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. This is the default live region 7575 * mode for most views. 7576 * <p> 7577 * To indicate that the user should be notified of changes, use 7578 * {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 7579 * <p> 7580 * If the view's changes should interrupt ongoing speech and notify the user 7581 * immediately, use {@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE}. 7582 * 7583 * @param mode The live region mode for this view, one of: 7584 * <ul> 7585 * <li>{@link #ACCESSIBILITY_LIVE_REGION_NONE} 7586 * <li>{@link #ACCESSIBILITY_LIVE_REGION_POLITE} 7587 * <li>{@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE} 7588 * </ul> 7589 * @attr ref android.R.styleable#View_accessibilityLiveRegion 7590 */ 7591 public void setAccessibilityLiveRegion(int mode) { 7592 if (mode != getAccessibilityLiveRegion()) { 7593 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 7594 mPrivateFlags2 |= (mode << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT) 7595 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 7596 notifyViewAccessibilityStateChangedIfNeeded( 7597 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 7598 } 7599 } 7600 7601 /** 7602 * Gets the live region mode for this View. 7603 * 7604 * @return The live region mode for the view. 7605 * 7606 * @attr ref android.R.styleable#View_accessibilityLiveRegion 7607 * 7608 * @see #setAccessibilityLiveRegion(int) 7609 */ 7610 public int getAccessibilityLiveRegion() { 7611 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK) 7612 >> PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 7613 } 7614 7615 /** 7616 * Sets how to determine whether this view is important for accessibility 7617 * which is if it fires accessibility events and if it is reported to 7618 * accessibility services that query the screen. 7619 * 7620 * @param mode How to determine whether this view is important for accessibility. 7621 * 7622 * @attr ref android.R.styleable#View_importantForAccessibility 7623 * 7624 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 7625 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 7626 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 7627 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 7628 */ 7629 public void setImportantForAccessibility(int mode) { 7630 final int oldMode = getImportantForAccessibility(); 7631 if (mode != oldMode) { 7632 // If we're moving between AUTO and another state, we might not need 7633 // to send a subtree changed notification. We'll store the computed 7634 // importance, since we'll need to check it later to make sure. 7635 final boolean maySkipNotify = oldMode == IMPORTANT_FOR_ACCESSIBILITY_AUTO 7636 || mode == IMPORTANT_FOR_ACCESSIBILITY_AUTO; 7637 final boolean oldIncludeForAccessibility = maySkipNotify && includeForAccessibility(); 7638 mPrivateFlags2 &= ~PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 7639 mPrivateFlags2 |= (mode << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT) 7640 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 7641 if (!maySkipNotify || oldIncludeForAccessibility != includeForAccessibility()) { 7642 notifySubtreeAccessibilityStateChangedIfNeeded(); 7643 } else { 7644 notifyViewAccessibilityStateChangedIfNeeded( 7645 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 7646 } 7647 } 7648 } 7649 7650 /** 7651 * Computes whether this view should be exposed for accessibility. In 7652 * general, views that are interactive or provide information are exposed 7653 * while views that serve only as containers are hidden. 7654 * <p> 7655 * If an ancestor of this view has importance 7656 * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, this method 7657 * returns <code>false</code>. 7658 * <p> 7659 * Otherwise, the value is computed according to the view's 7660 * {@link #getImportantForAccessibility()} value: 7661 * <ol> 7662 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_NO} or 7663 * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, return <code>false 7664 * </code> 7665 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_YES}, return <code>true</code> 7666 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_AUTO}, return <code>true</code> if 7667 * view satisfies any of the following: 7668 * <ul> 7669 * <li>Is actionable, e.g. {@link #isClickable()}, 7670 * {@link #isLongClickable()}, or {@link #isFocusable()} 7671 * <li>Has an {@link AccessibilityDelegate} 7672 * <li>Has an interaction listener, e.g. {@link OnTouchListener}, 7673 * {@link OnKeyListener}, etc. 7674 * <li>Is an accessibility live region, e.g. 7675 * {@link #getAccessibilityLiveRegion()} is not 7676 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. 7677 * </ul> 7678 * </ol> 7679 * 7680 * @return Whether the view is exposed for accessibility. 7681 * @see #setImportantForAccessibility(int) 7682 * @see #getImportantForAccessibility() 7683 */ 7684 public boolean isImportantForAccessibility() { 7685 final int mode = (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 7686 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 7687 if (mode == IMPORTANT_FOR_ACCESSIBILITY_NO 7688 || mode == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 7689 return false; 7690 } 7691 7692 // Check parent mode to ensure we're not hidden. 7693 ViewParent parent = mParent; 7694 while (parent instanceof View) { 7695 if (((View) parent).getImportantForAccessibility() 7696 == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 7697 return false; 7698 } 7699 parent = parent.getParent(); 7700 } 7701 7702 return mode == IMPORTANT_FOR_ACCESSIBILITY_YES || isActionableForAccessibility() 7703 || hasListenersForAccessibility() || getAccessibilityNodeProvider() != null 7704 || getAccessibilityLiveRegion() != ACCESSIBILITY_LIVE_REGION_NONE; 7705 } 7706 7707 /** 7708 * Gets the parent for accessibility purposes. Note that the parent for 7709 * accessibility is not necessary the immediate parent. It is the first 7710 * predecessor that is important for accessibility. 7711 * 7712 * @return The parent for accessibility purposes. 7713 */ 7714 public ViewParent getParentForAccessibility() { 7715 if (mParent instanceof View) { 7716 View parentView = (View) mParent; 7717 if (parentView.includeForAccessibility()) { 7718 return mParent; 7719 } else { 7720 return mParent.getParentForAccessibility(); 7721 } 7722 } 7723 return null; 7724 } 7725 7726 /** 7727 * Adds the children of a given View for accessibility. Since some Views are 7728 * not important for accessibility the children for accessibility are not 7729 * necessarily direct children of the view, rather they are the first level of 7730 * descendants important for accessibility. 7731 * 7732 * @param children The list of children for accessibility. 7733 */ 7734 public void addChildrenForAccessibility(ArrayList<View> children) { 7735 7736 } 7737 7738 /** 7739 * Whether to regard this view for accessibility. A view is regarded for 7740 * accessibility if it is important for accessibility or the querying 7741 * accessibility service has explicitly requested that view not 7742 * important for accessibility are regarded. 7743 * 7744 * @return Whether to regard the view for accessibility. 7745 * 7746 * @hide 7747 */ 7748 public boolean includeForAccessibility() { 7749 if (mAttachInfo != null) { 7750 return (mAttachInfo.mAccessibilityFetchFlags 7751 & AccessibilityNodeInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0 7752 || isImportantForAccessibility(); 7753 } 7754 return false; 7755 } 7756 7757 /** 7758 * Returns whether the View is considered actionable from 7759 * accessibility perspective. Such view are important for 7760 * accessibility. 7761 * 7762 * @return True if the view is actionable for accessibility. 7763 * 7764 * @hide 7765 */ 7766 public boolean isActionableForAccessibility() { 7767 return (isClickable() || isLongClickable() || isFocusable()); 7768 } 7769 7770 /** 7771 * Returns whether the View has registered callbacks which makes it 7772 * important for accessibility. 7773 * 7774 * @return True if the view is actionable for accessibility. 7775 */ 7776 private boolean hasListenersForAccessibility() { 7777 ListenerInfo info = getListenerInfo(); 7778 return mTouchDelegate != null || info.mOnKeyListener != null 7779 || info.mOnTouchListener != null || info.mOnGenericMotionListener != null 7780 || info.mOnHoverListener != null || info.mOnDragListener != null; 7781 } 7782 7783 /** 7784 * Notifies that the accessibility state of this view changed. The change 7785 * is local to this view and does not represent structural changes such 7786 * as children and parent. For example, the view became focusable. The 7787 * notification is at at most once every 7788 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 7789 * to avoid unnecessary load to the system. Also once a view has a pending 7790 * notification this method is a NOP until the notification has been sent. 7791 * 7792 * @hide 7793 */ 7794 public void notifyViewAccessibilityStateChangedIfNeeded(int changeType) { 7795 if (!AccessibilityManager.getInstance(mContext).isEnabled()) { 7796 return; 7797 } 7798 if (mSendViewStateChangedAccessibilityEvent == null) { 7799 mSendViewStateChangedAccessibilityEvent = 7800 new SendViewStateChangedAccessibilityEvent(); 7801 } 7802 mSendViewStateChangedAccessibilityEvent.runOrPost(changeType); 7803 } 7804 7805 /** 7806 * Notifies that the accessibility state of this view changed. The change 7807 * is *not* local to this view and does represent structural changes such 7808 * as children and parent. For example, the view size changed. The 7809 * notification is at at most once every 7810 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 7811 * to avoid unnecessary load to the system. Also once a view has a pending 7812 * notification this method is a NOP until the notification has been sent. 7813 * 7814 * @hide 7815 */ 7816 public void notifySubtreeAccessibilityStateChangedIfNeeded() { 7817 if (!AccessibilityManager.getInstance(mContext).isEnabled()) { 7818 return; 7819 } 7820 if ((mPrivateFlags2 & PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED) == 0) { 7821 mPrivateFlags2 |= PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 7822 if (mParent != null) { 7823 try { 7824 mParent.notifySubtreeAccessibilityStateChanged( 7825 this, this, AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); 7826 } catch (AbstractMethodError e) { 7827 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 7828 " does not fully implement ViewParent", e); 7829 } 7830 } 7831 } 7832 } 7833 7834 /** 7835 * Reset the flag indicating the accessibility state of the subtree rooted 7836 * at this view changed. 7837 */ 7838 void resetSubtreeAccessibilityStateChanged() { 7839 mPrivateFlags2 &= ~PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 7840 } 7841 7842 /** 7843 * Performs the specified accessibility action on the view. For 7844 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 7845 * <p> 7846 * If an {@link AccessibilityDelegate} has been specified via calling 7847 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 7848 * {@link AccessibilityDelegate#performAccessibilityAction(View, int, Bundle)} 7849 * is responsible for handling this call. 7850 * </p> 7851 * 7852 * @param action The action to perform. 7853 * @param arguments Optional action arguments. 7854 * @return Whether the action was performed. 7855 */ 7856 public boolean performAccessibilityAction(int action, Bundle arguments) { 7857 if (mAccessibilityDelegate != null) { 7858 return mAccessibilityDelegate.performAccessibilityAction(this, action, arguments); 7859 } else { 7860 return performAccessibilityActionInternal(action, arguments); 7861 } 7862 } 7863 7864 /** 7865 * @see #performAccessibilityAction(int, Bundle) 7866 * 7867 * Note: Called from the default {@link AccessibilityDelegate}. 7868 */ 7869 boolean performAccessibilityActionInternal(int action, Bundle arguments) { 7870 switch (action) { 7871 case AccessibilityNodeInfo.ACTION_CLICK: { 7872 if (isClickable()) { 7873 performClick(); 7874 return true; 7875 } 7876 } break; 7877 case AccessibilityNodeInfo.ACTION_LONG_CLICK: { 7878 if (isLongClickable()) { 7879 performLongClick(); 7880 return true; 7881 } 7882 } break; 7883 case AccessibilityNodeInfo.ACTION_FOCUS: { 7884 if (!hasFocus()) { 7885 // Get out of touch mode since accessibility 7886 // wants to move focus around. 7887 getViewRootImpl().ensureTouchMode(false); 7888 return requestFocus(); 7889 } 7890 } break; 7891 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 7892 if (hasFocus()) { 7893 clearFocus(); 7894 return !isFocused(); 7895 } 7896 } break; 7897 case AccessibilityNodeInfo.ACTION_SELECT: { 7898 if (!isSelected()) { 7899 setSelected(true); 7900 return isSelected(); 7901 } 7902 } break; 7903 case AccessibilityNodeInfo.ACTION_CLEAR_SELECTION: { 7904 if (isSelected()) { 7905 setSelected(false); 7906 return !isSelected(); 7907 } 7908 } break; 7909 case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: { 7910 if (!isAccessibilityFocused()) { 7911 return requestAccessibilityFocus(); 7912 } 7913 } break; 7914 case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: { 7915 if (isAccessibilityFocused()) { 7916 clearAccessibilityFocus(); 7917 return true; 7918 } 7919 } break; 7920 case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY: { 7921 if (arguments != null) { 7922 final int granularity = arguments.getInt( 7923 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 7924 final boolean extendSelection = arguments.getBoolean( 7925 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 7926 return traverseAtGranularity(granularity, true, extendSelection); 7927 } 7928 } break; 7929 case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: { 7930 if (arguments != null) { 7931 final int granularity = arguments.getInt( 7932 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 7933 final boolean extendSelection = arguments.getBoolean( 7934 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 7935 return traverseAtGranularity(granularity, false, extendSelection); 7936 } 7937 } break; 7938 case AccessibilityNodeInfo.ACTION_SET_SELECTION: { 7939 CharSequence text = getIterableTextForAccessibility(); 7940 if (text == null) { 7941 return false; 7942 } 7943 final int start = (arguments != null) ? arguments.getInt( 7944 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1; 7945 final int end = (arguments != null) ? arguments.getInt( 7946 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1; 7947 // Only cursor position can be specified (selection length == 0) 7948 if ((getAccessibilitySelectionStart() != start 7949 || getAccessibilitySelectionEnd() != end) 7950 && (start == end)) { 7951 setAccessibilitySelection(start, end); 7952 notifyViewAccessibilityStateChangedIfNeeded( 7953 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 7954 return true; 7955 } 7956 } break; 7957 } 7958 return false; 7959 } 7960 7961 private boolean traverseAtGranularity(int granularity, boolean forward, 7962 boolean extendSelection) { 7963 CharSequence text = getIterableTextForAccessibility(); 7964 if (text == null || text.length() == 0) { 7965 return false; 7966 } 7967 TextSegmentIterator iterator = getIteratorForGranularity(granularity); 7968 if (iterator == null) { 7969 return false; 7970 } 7971 int current = getAccessibilitySelectionEnd(); 7972 if (current == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 7973 current = forward ? 0 : text.length(); 7974 } 7975 final int[] range = forward ? iterator.following(current) : iterator.preceding(current); 7976 if (range == null) { 7977 return false; 7978 } 7979 final int segmentStart = range[0]; 7980 final int segmentEnd = range[1]; 7981 int selectionStart; 7982 int selectionEnd; 7983 if (extendSelection && isAccessibilitySelectionExtendable()) { 7984 selectionStart = getAccessibilitySelectionStart(); 7985 if (selectionStart == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 7986 selectionStart = forward ? segmentStart : segmentEnd; 7987 } 7988 selectionEnd = forward ? segmentEnd : segmentStart; 7989 } else { 7990 selectionStart = selectionEnd= forward ? segmentEnd : segmentStart; 7991 } 7992 setAccessibilitySelection(selectionStart, selectionEnd); 7993 final int action = forward ? AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY 7994 : AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY; 7995 sendViewTextTraversedAtGranularityEvent(action, granularity, segmentStart, segmentEnd); 7996 return true; 7997 } 7998 7999 /** 8000 * Gets the text reported for accessibility purposes. 8001 * 8002 * @return The accessibility text. 8003 * 8004 * @hide 8005 */ 8006 public CharSequence getIterableTextForAccessibility() { 8007 return getContentDescription(); 8008 } 8009 8010 /** 8011 * Gets whether accessibility selection can be extended. 8012 * 8013 * @return If selection is extensible. 8014 * 8015 * @hide 8016 */ 8017 public boolean isAccessibilitySelectionExtendable() { 8018 return false; 8019 } 8020 8021 /** 8022 * @hide 8023 */ 8024 public int getAccessibilitySelectionStart() { 8025 return mAccessibilityCursorPosition; 8026 } 8027 8028 /** 8029 * @hide 8030 */ 8031 public int getAccessibilitySelectionEnd() { 8032 return getAccessibilitySelectionStart(); 8033 } 8034 8035 /** 8036 * @hide 8037 */ 8038 public void setAccessibilitySelection(int start, int end) { 8039 if (start == end && end == mAccessibilityCursorPosition) { 8040 return; 8041 } 8042 if (start >= 0 && start == end && end <= getIterableTextForAccessibility().length()) { 8043 mAccessibilityCursorPosition = start; 8044 } else { 8045 mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 8046 } 8047 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED); 8048 } 8049 8050 private void sendViewTextTraversedAtGranularityEvent(int action, int granularity, 8051 int fromIndex, int toIndex) { 8052 if (mParent == null) { 8053 return; 8054 } 8055 AccessibilityEvent event = AccessibilityEvent.obtain( 8056 AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY); 8057 onInitializeAccessibilityEvent(event); 8058 onPopulateAccessibilityEvent(event); 8059 event.setFromIndex(fromIndex); 8060 event.setToIndex(toIndex); 8061 event.setAction(action); 8062 event.setMovementGranularity(granularity); 8063 mParent.requestSendAccessibilityEvent(this, event); 8064 } 8065 8066 /** 8067 * @hide 8068 */ 8069 public TextSegmentIterator getIteratorForGranularity(int granularity) { 8070 switch (granularity) { 8071 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER: { 8072 CharSequence text = getIterableTextForAccessibility(); 8073 if (text != null && text.length() > 0) { 8074 CharacterTextSegmentIterator iterator = 8075 CharacterTextSegmentIterator.getInstance( 8076 mContext.getResources().getConfiguration().locale); 8077 iterator.initialize(text.toString()); 8078 return iterator; 8079 } 8080 } break; 8081 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD: { 8082 CharSequence text = getIterableTextForAccessibility(); 8083 if (text != null && text.length() > 0) { 8084 WordTextSegmentIterator iterator = 8085 WordTextSegmentIterator.getInstance( 8086 mContext.getResources().getConfiguration().locale); 8087 iterator.initialize(text.toString()); 8088 return iterator; 8089 } 8090 } break; 8091 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH: { 8092 CharSequence text = getIterableTextForAccessibility(); 8093 if (text != null && text.length() > 0) { 8094 ParagraphTextSegmentIterator iterator = 8095 ParagraphTextSegmentIterator.getInstance(); 8096 iterator.initialize(text.toString()); 8097 return iterator; 8098 } 8099 } break; 8100 } 8101 return null; 8102 } 8103 8104 /** 8105 * @hide 8106 */ 8107 public void dispatchStartTemporaryDetach() { 8108 onStartTemporaryDetach(); 8109 } 8110 8111 /** 8112 * This is called when a container is going to temporarily detach a child, with 8113 * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. 8114 * It will either be followed by {@link #onFinishTemporaryDetach()} or 8115 * {@link #onDetachedFromWindow()} when the container is done. 8116 */ 8117 public void onStartTemporaryDetach() { 8118 removeUnsetPressCallback(); 8119 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 8120 } 8121 8122 /** 8123 * @hide 8124 */ 8125 public void dispatchFinishTemporaryDetach() { 8126 onFinishTemporaryDetach(); 8127 } 8128 8129 /** 8130 * Called after {@link #onStartTemporaryDetach} when the container is done 8131 * changing the view. 8132 */ 8133 public void onFinishTemporaryDetach() { 8134 } 8135 8136 /** 8137 * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} 8138 * for this view's window. Returns null if the view is not currently attached 8139 * to the window. Normally you will not need to use this directly, but 8140 * just use the standard high-level event callbacks like 8141 * {@link #onKeyDown(int, KeyEvent)}. 8142 */ 8143 public KeyEvent.DispatcherState getKeyDispatcherState() { 8144 return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; 8145 } 8146 8147 /** 8148 * Dispatch a key event before it is processed by any input method 8149 * associated with the view hierarchy. This can be used to intercept 8150 * key events in special situations before the IME consumes them; a 8151 * typical example would be handling the BACK key to update the application's 8152 * UI instead of allowing the IME to see it and close itself. 8153 * 8154 * @param event The key event to be dispatched. 8155 * @return True if the event was handled, false otherwise. 8156 */ 8157 public boolean dispatchKeyEventPreIme(KeyEvent event) { 8158 return onKeyPreIme(event.getKeyCode(), event); 8159 } 8160 8161 /** 8162 * Dispatch a key event to the next view on the focus path. This path runs 8163 * from the top of the view tree down to the currently focused view. If this 8164 * view has focus, it will dispatch to itself. Otherwise it will dispatch 8165 * the next node down the focus path. This method also fires any key 8166 * listeners. 8167 * 8168 * @param event The key event to be dispatched. 8169 * @return True if the event was handled, false otherwise. 8170 */ 8171 public boolean dispatchKeyEvent(KeyEvent event) { 8172 if (mInputEventConsistencyVerifier != null) { 8173 mInputEventConsistencyVerifier.onKeyEvent(event, 0); 8174 } 8175 8176 // Give any attached key listener a first crack at the event. 8177 //noinspection SimplifiableIfStatement 8178 ListenerInfo li = mListenerInfo; 8179 if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 8180 && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { 8181 return true; 8182 } 8183 8184 if (event.dispatch(this, mAttachInfo != null 8185 ? mAttachInfo.mKeyDispatchState : null, this)) { 8186 return true; 8187 } 8188 8189 if (mInputEventConsistencyVerifier != null) { 8190 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 8191 } 8192 return false; 8193 } 8194 8195 /** 8196 * Dispatches a key shortcut event. 8197 * 8198 * @param event The key event to be dispatched. 8199 * @return True if the event was handled by the view, false otherwise. 8200 */ 8201 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 8202 return onKeyShortcut(event.getKeyCode(), event); 8203 } 8204 8205 /** 8206 * Pass the touch screen motion event down to the target view, or this 8207 * view if it is the target. 8208 * 8209 * @param event The motion event to be dispatched. 8210 * @return True if the event was handled by the view, false otherwise. 8211 */ 8212 public boolean dispatchTouchEvent(MotionEvent event) { 8213 boolean result = false; 8214 8215 if (mInputEventConsistencyVerifier != null) { 8216 mInputEventConsistencyVerifier.onTouchEvent(event, 0); 8217 } 8218 8219 final int actionMasked = event.getActionMasked(); 8220 if (actionMasked == MotionEvent.ACTION_DOWN) { 8221 // Defensive cleanup for new gesture 8222 stopNestedScroll(); 8223 } 8224 8225 if (onFilterTouchEventForSecurity(event)) { 8226 //noinspection SimplifiableIfStatement 8227 ListenerInfo li = mListenerInfo; 8228 if (li != null && li.mOnTouchListener != null 8229 && (mViewFlags & ENABLED_MASK) == ENABLED 8230 && li.mOnTouchListener.onTouch(this, event)) { 8231 result = true; 8232 } 8233 8234 if (!result && onTouchEvent(event)) { 8235 result = true; 8236 } 8237 } 8238 8239 if (!result && mInputEventConsistencyVerifier != null) { 8240 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 8241 } 8242 8243 // Clean up after nested scrolls if this is the end of a gesture; 8244 // also cancel it if we tried an ACTION_DOWN but we didn't want the rest 8245 // of the gesture. 8246 if (actionMasked == MotionEvent.ACTION_UP || 8247 actionMasked == MotionEvent.ACTION_CANCEL || 8248 (actionMasked == MotionEvent.ACTION_DOWN && !result)) { 8249 stopNestedScroll(); 8250 } 8251 8252 return result; 8253 } 8254 8255 /** 8256 * Filter the touch event to apply security policies. 8257 * 8258 * @param event The motion event to be filtered. 8259 * @return True if the event should be dispatched, false if the event should be dropped. 8260 * 8261 * @see #getFilterTouchesWhenObscured 8262 */ 8263 public boolean onFilterTouchEventForSecurity(MotionEvent event) { 8264 //noinspection RedundantIfStatement 8265 if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 8266 && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { 8267 // Window is obscured, drop this touch. 8268 return false; 8269 } 8270 return true; 8271 } 8272 8273 /** 8274 * Pass a trackball motion event down to the focused view. 8275 * 8276 * @param event The motion event to be dispatched. 8277 * @return True if the event was handled by the view, false otherwise. 8278 */ 8279 public boolean dispatchTrackballEvent(MotionEvent event) { 8280 if (mInputEventConsistencyVerifier != null) { 8281 mInputEventConsistencyVerifier.onTrackballEvent(event, 0); 8282 } 8283 8284 return onTrackballEvent(event); 8285 } 8286 8287 /** 8288 * Dispatch a generic motion event. 8289 * <p> 8290 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 8291 * are delivered to the view under the pointer. All other generic motion events are 8292 * delivered to the focused view. Hover events are handled specially and are delivered 8293 * to {@link #onHoverEvent(MotionEvent)}. 8294 * </p> 8295 * 8296 * @param event The motion event to be dispatched. 8297 * @return True if the event was handled by the view, false otherwise. 8298 */ 8299 public boolean dispatchGenericMotionEvent(MotionEvent event) { 8300 if (mInputEventConsistencyVerifier != null) { 8301 mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); 8302 } 8303 8304 final int source = event.getSource(); 8305 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 8306 final int action = event.getAction(); 8307 if (action == MotionEvent.ACTION_HOVER_ENTER 8308 || action == MotionEvent.ACTION_HOVER_MOVE 8309 || action == MotionEvent.ACTION_HOVER_EXIT) { 8310 if (dispatchHoverEvent(event)) { 8311 return true; 8312 } 8313 } else if (dispatchGenericPointerEvent(event)) { 8314 return true; 8315 } 8316 } else if (dispatchGenericFocusedEvent(event)) { 8317 return true; 8318 } 8319 8320 if (dispatchGenericMotionEventInternal(event)) { 8321 return true; 8322 } 8323 8324 if (mInputEventConsistencyVerifier != null) { 8325 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 8326 } 8327 return false; 8328 } 8329 8330 private boolean dispatchGenericMotionEventInternal(MotionEvent event) { 8331 //noinspection SimplifiableIfStatement 8332 ListenerInfo li = mListenerInfo; 8333 if (li != null && li.mOnGenericMotionListener != null 8334 && (mViewFlags & ENABLED_MASK) == ENABLED 8335 && li.mOnGenericMotionListener.onGenericMotion(this, event)) { 8336 return true; 8337 } 8338 8339 if (onGenericMotionEvent(event)) { 8340 return true; 8341 } 8342 8343 if (mInputEventConsistencyVerifier != null) { 8344 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 8345 } 8346 return false; 8347 } 8348 8349 /** 8350 * Dispatch a hover event. 8351 * <p> 8352 * Do not call this method directly. 8353 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 8354 * </p> 8355 * 8356 * @param event The motion event to be dispatched. 8357 * @return True if the event was handled by the view, false otherwise. 8358 */ 8359 protected boolean dispatchHoverEvent(MotionEvent event) { 8360 ListenerInfo li = mListenerInfo; 8361 //noinspection SimplifiableIfStatement 8362 if (li != null && li.mOnHoverListener != null 8363 && (mViewFlags & ENABLED_MASK) == ENABLED 8364 && li.mOnHoverListener.onHover(this, event)) { 8365 return true; 8366 } 8367 8368 return onHoverEvent(event); 8369 } 8370 8371 /** 8372 * Returns true if the view has a child to which it has recently sent 8373 * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and 8374 * it does not have a hovered child, then it must be the innermost hovered view. 8375 * @hide 8376 */ 8377 protected boolean hasHoveredChild() { 8378 return false; 8379 } 8380 8381 /** 8382 * Dispatch a generic motion event to the view under the first pointer. 8383 * <p> 8384 * Do not call this method directly. 8385 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 8386 * </p> 8387 * 8388 * @param event The motion event to be dispatched. 8389 * @return True if the event was handled by the view, false otherwise. 8390 */ 8391 protected boolean dispatchGenericPointerEvent(MotionEvent event) { 8392 return false; 8393 } 8394 8395 /** 8396 * Dispatch a generic motion event to the currently focused view. 8397 * <p> 8398 * Do not call this method directly. 8399 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 8400 * </p> 8401 * 8402 * @param event The motion event to be dispatched. 8403 * @return True if the event was handled by the view, false otherwise. 8404 */ 8405 protected boolean dispatchGenericFocusedEvent(MotionEvent event) { 8406 return false; 8407 } 8408 8409 /** 8410 * Dispatch a pointer event. 8411 * <p> 8412 * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all 8413 * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns 8414 * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches 8415 * and should not be expected to handle other pointing device features. 8416 * </p> 8417 * 8418 * @param event The motion event to be dispatched. 8419 * @return True if the event was handled by the view, false otherwise. 8420 * @hide 8421 */ 8422 public final boolean dispatchPointerEvent(MotionEvent event) { 8423 if (event.isTouchEvent()) { 8424 return dispatchTouchEvent(event); 8425 } else { 8426 return dispatchGenericMotionEvent(event); 8427 } 8428 } 8429 8430 /** 8431 * Called when the window containing this view gains or loses window focus. 8432 * ViewGroups should override to route to their children. 8433 * 8434 * @param hasFocus True if the window containing this view now has focus, 8435 * false otherwise. 8436 */ 8437 public void dispatchWindowFocusChanged(boolean hasFocus) { 8438 onWindowFocusChanged(hasFocus); 8439 } 8440 8441 /** 8442 * Called when the window containing this view gains or loses focus. Note 8443 * that this is separate from view focus: to receive key events, both 8444 * your view and its window must have focus. If a window is displayed 8445 * on top of yours that takes input focus, then your own window will lose 8446 * focus but the view focus will remain unchanged. 8447 * 8448 * @param hasWindowFocus True if the window containing this view now has 8449 * focus, false otherwise. 8450 */ 8451 public void onWindowFocusChanged(boolean hasWindowFocus) { 8452 InputMethodManager imm = InputMethodManager.peekInstance(); 8453 if (!hasWindowFocus) { 8454 if (isPressed()) { 8455 setPressed(false); 8456 } 8457 if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 8458 imm.focusOut(this); 8459 } 8460 removeLongPressCallback(); 8461 removeTapCallback(); 8462 onFocusLost(); 8463 } else if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 8464 imm.focusIn(this); 8465 } 8466 refreshDrawableState(); 8467 } 8468 8469 /** 8470 * Returns true if this view is in a window that currently has window focus. 8471 * Note that this is not the same as the view itself having focus. 8472 * 8473 * @return True if this view is in a window that currently has window focus. 8474 */ 8475 public boolean hasWindowFocus() { 8476 return mAttachInfo != null && mAttachInfo.mHasWindowFocus; 8477 } 8478 8479 /** 8480 * Dispatch a view visibility change down the view hierarchy. 8481 * ViewGroups should override to route to their children. 8482 * @param changedView The view whose visibility changed. Could be 'this' or 8483 * an ancestor view. 8484 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 8485 * {@link #INVISIBLE} or {@link #GONE}. 8486 */ 8487 protected void dispatchVisibilityChanged(@NonNull View changedView, 8488 @Visibility int visibility) { 8489 onVisibilityChanged(changedView, visibility); 8490 } 8491 8492 /** 8493 * Called when the visibility of the view or an ancestor of the view is changed. 8494 * @param changedView The view whose visibility changed. Could be 'this' or 8495 * an ancestor view. 8496 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 8497 * {@link #INVISIBLE} or {@link #GONE}. 8498 */ 8499 protected void onVisibilityChanged(@NonNull View changedView, @Visibility int visibility) { 8500 if (visibility == VISIBLE) { 8501 if (mAttachInfo != null) { 8502 initialAwakenScrollBars(); 8503 } else { 8504 mPrivateFlags |= PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH; 8505 } 8506 } 8507 } 8508 8509 /** 8510 * Dispatch a hint about whether this view is displayed. For instance, when 8511 * a View moves out of the screen, it might receives a display hint indicating 8512 * the view is not displayed. Applications should not <em>rely</em> on this hint 8513 * as there is no guarantee that they will receive one. 8514 * 8515 * @param hint A hint about whether or not this view is displayed: 8516 * {@link #VISIBLE} or {@link #INVISIBLE}. 8517 */ 8518 public void dispatchDisplayHint(@Visibility int hint) { 8519 onDisplayHint(hint); 8520 } 8521 8522 /** 8523 * Gives this view a hint about whether is displayed or not. For instance, when 8524 * a View moves out of the screen, it might receives a display hint indicating 8525 * the view is not displayed. Applications should not <em>rely</em> on this hint 8526 * as there is no guarantee that they will receive one. 8527 * 8528 * @param hint A hint about whether or not this view is displayed: 8529 * {@link #VISIBLE} or {@link #INVISIBLE}. 8530 */ 8531 protected void onDisplayHint(@Visibility int hint) { 8532 } 8533 8534 /** 8535 * Dispatch a window visibility change down the view hierarchy. 8536 * ViewGroups should override to route to their children. 8537 * 8538 * @param visibility The new visibility of the window. 8539 * 8540 * @see #onWindowVisibilityChanged(int) 8541 */ 8542 public void dispatchWindowVisibilityChanged(@Visibility int visibility) { 8543 onWindowVisibilityChanged(visibility); 8544 } 8545 8546 /** 8547 * Called when the window containing has change its visibility 8548 * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note 8549 * that this tells you whether or not your window is being made visible 8550 * to the window manager; this does <em>not</em> tell you whether or not 8551 * your window is obscured by other windows on the screen, even if it 8552 * is itself visible. 8553 * 8554 * @param visibility The new visibility of the window. 8555 */ 8556 protected void onWindowVisibilityChanged(@Visibility int visibility) { 8557 if (visibility == VISIBLE) { 8558 initialAwakenScrollBars(); 8559 } 8560 } 8561 8562 /** 8563 * Returns the current visibility of the window this view is attached to 8564 * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). 8565 * 8566 * @return Returns the current visibility of the view's window. 8567 */ 8568 @Visibility 8569 public int getWindowVisibility() { 8570 return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; 8571 } 8572 8573 /** 8574 * Retrieve the overall visible display size in which the window this view is 8575 * attached to has been positioned in. This takes into account screen 8576 * decorations above the window, for both cases where the window itself 8577 * is being position inside of them or the window is being placed under 8578 * then and covered insets are used for the window to position its content 8579 * inside. In effect, this tells you the available area where content can 8580 * be placed and remain visible to users. 8581 * 8582 * <p>This function requires an IPC back to the window manager to retrieve 8583 * the requested information, so should not be used in performance critical 8584 * code like drawing. 8585 * 8586 * @param outRect Filled in with the visible display frame. If the view 8587 * is not attached to a window, this is simply the raw display size. 8588 */ 8589 public void getWindowVisibleDisplayFrame(Rect outRect) { 8590 if (mAttachInfo != null) { 8591 try { 8592 mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); 8593 } catch (RemoteException e) { 8594 return; 8595 } 8596 // XXX This is really broken, and probably all needs to be done 8597 // in the window manager, and we need to know more about whether 8598 // we want the area behind or in front of the IME. 8599 final Rect insets = mAttachInfo.mVisibleInsets; 8600 outRect.left += insets.left; 8601 outRect.top += insets.top; 8602 outRect.right -= insets.right; 8603 outRect.bottom -= insets.bottom; 8604 return; 8605 } 8606 // The view is not attached to a display so we don't have a context. 8607 // Make a best guess about the display size. 8608 Display d = DisplayManagerGlobal.getInstance().getRealDisplay(Display.DEFAULT_DISPLAY); 8609 d.getRectSize(outRect); 8610 } 8611 8612 /** 8613 * Dispatch a notification about a resource configuration change down 8614 * the view hierarchy. 8615 * ViewGroups should override to route to their children. 8616 * 8617 * @param newConfig The new resource configuration. 8618 * 8619 * @see #onConfigurationChanged(android.content.res.Configuration) 8620 */ 8621 public void dispatchConfigurationChanged(Configuration newConfig) { 8622 onConfigurationChanged(newConfig); 8623 } 8624 8625 /** 8626 * Called when the current configuration of the resources being used 8627 * by the application have changed. You can use this to decide when 8628 * to reload resources that can changed based on orientation and other 8629 * configuration characterstics. You only need to use this if you are 8630 * not relying on the normal {@link android.app.Activity} mechanism of 8631 * recreating the activity instance upon a configuration change. 8632 * 8633 * @param newConfig The new resource configuration. 8634 */ 8635 protected void onConfigurationChanged(Configuration newConfig) { 8636 } 8637 8638 /** 8639 * Private function to aggregate all per-view attributes in to the view 8640 * root. 8641 */ 8642 void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) { 8643 performCollectViewAttributes(attachInfo, visibility); 8644 } 8645 8646 void performCollectViewAttributes(AttachInfo attachInfo, int visibility) { 8647 if ((visibility & VISIBILITY_MASK) == VISIBLE) { 8648 if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { 8649 attachInfo.mKeepScreenOn = true; 8650 } 8651 attachInfo.mSystemUiVisibility |= mSystemUiVisibility; 8652 ListenerInfo li = mListenerInfo; 8653 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 8654 attachInfo.mHasSystemUiListeners = true; 8655 } 8656 } 8657 } 8658 8659 void needGlobalAttributesUpdate(boolean force) { 8660 final AttachInfo ai = mAttachInfo; 8661 if (ai != null && !ai.mRecomputeGlobalAttributes) { 8662 if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) 8663 || ai.mHasSystemUiListeners) { 8664 ai.mRecomputeGlobalAttributes = true; 8665 } 8666 } 8667 } 8668 8669 /** 8670 * Returns whether the device is currently in touch mode. Touch mode is entered 8671 * once the user begins interacting with the device by touch, and affects various 8672 * things like whether focus is always visible to the user. 8673 * 8674 * @return Whether the device is in touch mode. 8675 */ 8676 @ViewDebug.ExportedProperty 8677 public boolean isInTouchMode() { 8678 if (mAttachInfo != null) { 8679 return mAttachInfo.mInTouchMode; 8680 } else { 8681 return ViewRootImpl.isInTouchMode(); 8682 } 8683 } 8684 8685 /** 8686 * Returns the context the view is running in, through which it can 8687 * access the current theme, resources, etc. 8688 * 8689 * @return The view's Context. 8690 */ 8691 @ViewDebug.CapturedViewProperty 8692 public final Context getContext() { 8693 return mContext; 8694 } 8695 8696 /** 8697 * Handle a key event before it is processed by any input method 8698 * associated with the view hierarchy. This can be used to intercept 8699 * key events in special situations before the IME consumes them; a 8700 * typical example would be handling the BACK key to update the application's 8701 * UI instead of allowing the IME to see it and close itself. 8702 * 8703 * @param keyCode The value in event.getKeyCode(). 8704 * @param event Description of the key event. 8705 * @return If you handled the event, return true. If you want to allow the 8706 * event to be handled by the next receiver, return false. 8707 */ 8708 public boolean onKeyPreIme(int keyCode, KeyEvent event) { 8709 return false; 8710 } 8711 8712 /** 8713 * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) 8714 * KeyEvent.Callback.onKeyDown()}: perform press of the view 8715 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} 8716 * is released, if the view is enabled and clickable. 8717 * 8718 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8719 * although some may elect to do so in some situations. Do not rely on this to 8720 * catch software key presses. 8721 * 8722 * @param keyCode A key code that represents the button pressed, from 8723 * {@link android.view.KeyEvent}. 8724 * @param event The KeyEvent object that defines the button action. 8725 */ 8726 public boolean onKeyDown(int keyCode, KeyEvent event) { 8727 boolean result = false; 8728 8729 if (KeyEvent.isConfirmKey(keyCode)) { 8730 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 8731 return true; 8732 } 8733 // Long clickable items don't necessarily have to be clickable 8734 if (((mViewFlags & CLICKABLE) == CLICKABLE || 8735 (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && 8736 (event.getRepeatCount() == 0)) { 8737 setPressed(true); 8738 checkForLongClick(0); 8739 return true; 8740 } 8741 } 8742 return result; 8743 } 8744 8745 /** 8746 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 8747 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 8748 * the event). 8749 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8750 * although some may elect to do so in some situations. Do not rely on this to 8751 * catch software key presses. 8752 */ 8753 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 8754 return false; 8755 } 8756 8757 /** 8758 * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) 8759 * KeyEvent.Callback.onKeyUp()}: perform clicking of the view 8760 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or 8761 * {@link KeyEvent#KEYCODE_ENTER} is released. 8762 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8763 * although some may elect to do so in some situations. Do not rely on this to 8764 * catch software key presses. 8765 * 8766 * @param keyCode A key code that represents the button pressed, from 8767 * {@link android.view.KeyEvent}. 8768 * @param event The KeyEvent object that defines the button action. 8769 */ 8770 public boolean onKeyUp(int keyCode, KeyEvent event) { 8771 if (KeyEvent.isConfirmKey(keyCode)) { 8772 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 8773 return true; 8774 } 8775 if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { 8776 setPressed(false); 8777 8778 if (!mHasPerformedLongPress) { 8779 // This is a tap, so remove the longpress check 8780 removeLongPressCallback(); 8781 return performClick(); 8782 } 8783 } 8784 } 8785 return false; 8786 } 8787 8788 /** 8789 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 8790 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 8791 * the event). 8792 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8793 * although some may elect to do so in some situations. Do not rely on this to 8794 * catch software key presses. 8795 * 8796 * @param keyCode A key code that represents the button pressed, from 8797 * {@link android.view.KeyEvent}. 8798 * @param repeatCount The number of times the action was made. 8799 * @param event The KeyEvent object that defines the button action. 8800 */ 8801 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 8802 return false; 8803 } 8804 8805 /** 8806 * Called on the focused view when a key shortcut event is not handled. 8807 * Override this method to implement local key shortcuts for the View. 8808 * Key shortcuts can also be implemented by setting the 8809 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 8810 * 8811 * @param keyCode The value in event.getKeyCode(). 8812 * @param event Description of the key event. 8813 * @return If you handled the event, return true. If you want to allow the 8814 * event to be handled by the next receiver, return false. 8815 */ 8816 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 8817 return false; 8818 } 8819 8820 /** 8821 * Check whether the called view is a text editor, in which case it 8822 * would make sense to automatically display a soft input window for 8823 * it. Subclasses should override this if they implement 8824 * {@link #onCreateInputConnection(EditorInfo)} to return true if 8825 * a call on that method would return a non-null InputConnection, and 8826 * they are really a first-class editor that the user would normally 8827 * start typing on when the go into a window containing your view. 8828 * 8829 * <p>The default implementation always returns false. This does 8830 * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} 8831 * will not be called or the user can not otherwise perform edits on your 8832 * view; it is just a hint to the system that this is not the primary 8833 * purpose of this view. 8834 * 8835 * @return Returns true if this view is a text editor, else false. 8836 */ 8837 public boolean onCheckIsTextEditor() { 8838 return false; 8839 } 8840 8841 /** 8842 * Create a new InputConnection for an InputMethod to interact 8843 * with the view. The default implementation returns null, since it doesn't 8844 * support input methods. You can override this to implement such support. 8845 * This is only needed for views that take focus and text input. 8846 * 8847 * <p>When implementing this, you probably also want to implement 8848 * {@link #onCheckIsTextEditor()} to indicate you will return a 8849 * non-null InputConnection.</p> 8850 * 8851 * <p>Also, take good care to fill in the {@link android.view.inputmethod.EditorInfo} 8852 * object correctly and in its entirety, so that the connected IME can rely 8853 * on its values. For example, {@link android.view.inputmethod.EditorInfo#initialSelStart} 8854 * and {@link android.view.inputmethod.EditorInfo#initialSelEnd} members 8855 * must be filled in with the correct cursor position for IMEs to work correctly 8856 * with your application.</p> 8857 * 8858 * @param outAttrs Fill in with attribute information about the connection. 8859 */ 8860 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { 8861 return null; 8862 } 8863 8864 /** 8865 * Called by the {@link android.view.inputmethod.InputMethodManager} 8866 * when a view who is not the current 8867 * input connection target is trying to make a call on the manager. The 8868 * default implementation returns false; you can override this to return 8869 * true for certain views if you are performing InputConnection proxying 8870 * to them. 8871 * @param view The View that is making the InputMethodManager call. 8872 * @return Return true to allow the call, false to reject. 8873 */ 8874 public boolean checkInputConnectionProxy(View view) { 8875 return false; 8876 } 8877 8878 /** 8879 * Show the context menu for this view. It is not safe to hold on to the 8880 * menu after returning from this method. 8881 * 8882 * You should normally not overload this method. Overload 8883 * {@link #onCreateContextMenu(ContextMenu)} or define an 8884 * {@link OnCreateContextMenuListener} to add items to the context menu. 8885 * 8886 * @param menu The context menu to populate 8887 */ 8888 public void createContextMenu(ContextMenu menu) { 8889 ContextMenuInfo menuInfo = getContextMenuInfo(); 8890 8891 // Sets the current menu info so all items added to menu will have 8892 // my extra info set. 8893 ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); 8894 8895 onCreateContextMenu(menu); 8896 ListenerInfo li = mListenerInfo; 8897 if (li != null && li.mOnCreateContextMenuListener != null) { 8898 li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); 8899 } 8900 8901 // Clear the extra information so subsequent items that aren't mine don't 8902 // have my extra info. 8903 ((MenuBuilder)menu).setCurrentMenuInfo(null); 8904 8905 if (mParent != null) { 8906 mParent.createContextMenu(menu); 8907 } 8908 } 8909 8910 /** 8911 * Views should implement this if they have extra information to associate 8912 * with the context menu. The return result is supplied as a parameter to 8913 * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} 8914 * callback. 8915 * 8916 * @return Extra information about the item for which the context menu 8917 * should be shown. This information will vary across different 8918 * subclasses of View. 8919 */ 8920 protected ContextMenuInfo getContextMenuInfo() { 8921 return null; 8922 } 8923 8924 /** 8925 * Views should implement this if the view itself is going to add items to 8926 * the context menu. 8927 * 8928 * @param menu the context menu to populate 8929 */ 8930 protected void onCreateContextMenu(ContextMenu menu) { 8931 } 8932 8933 /** 8934 * Implement this method to handle trackball motion events. The 8935 * <em>relative</em> movement of the trackball since the last event 8936 * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and 8937 * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so 8938 * that a movement of 1 corresponds to the user pressing one DPAD key (so 8939 * they will often be fractional values, representing the more fine-grained 8940 * movement information available from a trackball). 8941 * 8942 * @param event The motion event. 8943 * @return True if the event was handled, false otherwise. 8944 */ 8945 public boolean onTrackballEvent(MotionEvent event) { 8946 return false; 8947 } 8948 8949 /** 8950 * Implement this method to handle generic motion events. 8951 * <p> 8952 * Generic motion events describe joystick movements, mouse hovers, track pad 8953 * touches, scroll wheel movements and other input events. The 8954 * {@link MotionEvent#getSource() source} of the motion event specifies 8955 * the class of input that was received. Implementations of this method 8956 * must examine the bits in the source before processing the event. 8957 * The following code example shows how this is done. 8958 * </p><p> 8959 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 8960 * are delivered to the view under the pointer. All other generic motion events are 8961 * delivered to the focused view. 8962 * </p> 8963 * <pre> public boolean onGenericMotionEvent(MotionEvent event) { 8964 * if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) { 8965 * if (event.getAction() == MotionEvent.ACTION_MOVE) { 8966 * // process the joystick movement... 8967 * return true; 8968 * } 8969 * } 8970 * if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) { 8971 * switch (event.getAction()) { 8972 * case MotionEvent.ACTION_HOVER_MOVE: 8973 * // process the mouse hover movement... 8974 * return true; 8975 * case MotionEvent.ACTION_SCROLL: 8976 * // process the scroll wheel movement... 8977 * return true; 8978 * } 8979 * } 8980 * return super.onGenericMotionEvent(event); 8981 * }</pre> 8982 * 8983 * @param event The generic motion event being processed. 8984 * @return True if the event was handled, false otherwise. 8985 */ 8986 public boolean onGenericMotionEvent(MotionEvent event) { 8987 return false; 8988 } 8989 8990 /** 8991 * Implement this method to handle hover events. 8992 * <p> 8993 * This method is called whenever a pointer is hovering into, over, or out of the 8994 * bounds of a view and the view is not currently being touched. 8995 * Hover events are represented as pointer events with action 8996 * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, 8997 * or {@link MotionEvent#ACTION_HOVER_EXIT}. 8998 * </p> 8999 * <ul> 9000 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} 9001 * when the pointer enters the bounds of the view.</li> 9002 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} 9003 * when the pointer has already entered the bounds of the view and has moved.</li> 9004 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} 9005 * when the pointer has exited the bounds of the view or when the pointer is 9006 * about to go down due to a button click, tap, or similar user action that 9007 * causes the view to be touched.</li> 9008 * </ul> 9009 * <p> 9010 * The view should implement this method to return true to indicate that it is 9011 * handling the hover event, such as by changing its drawable state. 9012 * </p><p> 9013 * The default implementation calls {@link #setHovered} to update the hovered state 9014 * of the view when a hover enter or hover exit event is received, if the view 9015 * is enabled and is clickable. The default implementation also sends hover 9016 * accessibility events. 9017 * </p> 9018 * 9019 * @param event The motion event that describes the hover. 9020 * @return True if the view handled the hover event. 9021 * 9022 * @see #isHovered 9023 * @see #setHovered 9024 * @see #onHoverChanged 9025 */ 9026 public boolean onHoverEvent(MotionEvent event) { 9027 // The root view may receive hover (or touch) events that are outside the bounds of 9028 // the window. This code ensures that we only send accessibility events for 9029 // hovers that are actually within the bounds of the root view. 9030 final int action = event.getActionMasked(); 9031 if (!mSendingHoverAccessibilityEvents) { 9032 if ((action == MotionEvent.ACTION_HOVER_ENTER 9033 || action == MotionEvent.ACTION_HOVER_MOVE) 9034 && !hasHoveredChild() 9035 && pointInView(event.getX(), event.getY())) { 9036 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 9037 mSendingHoverAccessibilityEvents = true; 9038 } 9039 } else { 9040 if (action == MotionEvent.ACTION_HOVER_EXIT 9041 || (action == MotionEvent.ACTION_MOVE 9042 && !pointInView(event.getX(), event.getY()))) { 9043 mSendingHoverAccessibilityEvents = false; 9044 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 9045 } 9046 } 9047 9048 if (isHoverable()) { 9049 switch (action) { 9050 case MotionEvent.ACTION_HOVER_ENTER: 9051 setHovered(true); 9052 break; 9053 case MotionEvent.ACTION_HOVER_EXIT: 9054 setHovered(false); 9055 break; 9056 } 9057 9058 // Dispatch the event to onGenericMotionEvent before returning true. 9059 // This is to provide compatibility with existing applications that 9060 // handled HOVER_MOVE events in onGenericMotionEvent and that would 9061 // break because of the new default handling for hoverable views 9062 // in onHoverEvent. 9063 // Note that onGenericMotionEvent will be called by default when 9064 // onHoverEvent returns false (refer to dispatchGenericMotionEvent). 9065 dispatchGenericMotionEventInternal(event); 9066 // The event was already handled by calling setHovered(), so always 9067 // return true. 9068 return true; 9069 } 9070 9071 return false; 9072 } 9073 9074 /** 9075 * Returns true if the view should handle {@link #onHoverEvent} 9076 * by calling {@link #setHovered} to change its hovered state. 9077 * 9078 * @return True if the view is hoverable. 9079 */ 9080 private boolean isHoverable() { 9081 final int viewFlags = mViewFlags; 9082 if ((viewFlags & ENABLED_MASK) == DISABLED) { 9083 return false; 9084 } 9085 9086 return (viewFlags & CLICKABLE) == CLICKABLE 9087 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 9088 } 9089 9090 /** 9091 * Returns true if the view is currently hovered. 9092 * 9093 * @return True if the view is currently hovered. 9094 * 9095 * @see #setHovered 9096 * @see #onHoverChanged 9097 */ 9098 @ViewDebug.ExportedProperty 9099 public boolean isHovered() { 9100 return (mPrivateFlags & PFLAG_HOVERED) != 0; 9101 } 9102 9103 /** 9104 * Sets whether the view is currently hovered. 9105 * <p> 9106 * Calling this method also changes the drawable state of the view. This 9107 * enables the view to react to hover by using different drawable resources 9108 * to change its appearance. 9109 * </p><p> 9110 * The {@link #onHoverChanged} method is called when the hovered state changes. 9111 * </p> 9112 * 9113 * @param hovered True if the view is hovered. 9114 * 9115 * @see #isHovered 9116 * @see #onHoverChanged 9117 */ 9118 public void setHovered(boolean hovered) { 9119 if (hovered) { 9120 if ((mPrivateFlags & PFLAG_HOVERED) == 0) { 9121 mPrivateFlags |= PFLAG_HOVERED; 9122 refreshDrawableState(); 9123 onHoverChanged(true); 9124 } 9125 } else { 9126 if ((mPrivateFlags & PFLAG_HOVERED) != 0) { 9127 mPrivateFlags &= ~PFLAG_HOVERED; 9128 refreshDrawableState(); 9129 onHoverChanged(false); 9130 } 9131 } 9132 } 9133 9134 /** 9135 * Implement this method to handle hover state changes. 9136 * <p> 9137 * This method is called whenever the hover state changes as a result of a 9138 * call to {@link #setHovered}. 9139 * </p> 9140 * 9141 * @param hovered The current hover state, as returned by {@link #isHovered}. 9142 * 9143 * @see #isHovered 9144 * @see #setHovered 9145 */ 9146 public void onHoverChanged(boolean hovered) { 9147 } 9148 9149 /** 9150 * Implement this method to handle touch screen motion events. 9151 * <p> 9152 * If this method is used to detect click actions, it is recommended that 9153 * the actions be performed by implementing and calling 9154 * {@link #performClick()}. This will ensure consistent system behavior, 9155 * including: 9156 * <ul> 9157 * <li>obeying click sound preferences 9158 * <li>dispatching OnClickListener calls 9159 * <li>handling {@link AccessibilityNodeInfo#ACTION_CLICK ACTION_CLICK} when 9160 * accessibility features are enabled 9161 * </ul> 9162 * 9163 * @param event The motion event. 9164 * @return True if the event was handled, false otherwise. 9165 */ 9166 public boolean onTouchEvent(MotionEvent event) { 9167 final float x = event.getX(); 9168 final float y = event.getY(); 9169 final int viewFlags = mViewFlags; 9170 9171 if ((viewFlags & ENABLED_MASK) == DISABLED) { 9172 if (event.getAction() == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) { 9173 setPressed(false); 9174 } 9175 // A disabled view that is clickable still consumes the touch 9176 // events, it just doesn't respond to them. 9177 return (((viewFlags & CLICKABLE) == CLICKABLE || 9178 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)); 9179 } 9180 9181 if (mTouchDelegate != null) { 9182 if (mTouchDelegate.onTouchEvent(event)) { 9183 return true; 9184 } 9185 } 9186 9187 if (((viewFlags & CLICKABLE) == CLICKABLE || 9188 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) { 9189 switch (event.getAction()) { 9190 case MotionEvent.ACTION_UP: 9191 boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; 9192 if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { 9193 // take focus if we don't have it already and we should in 9194 // touch mode. 9195 boolean focusTaken = false; 9196 if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { 9197 focusTaken = requestFocus(); 9198 } 9199 9200 if (prepressed) { 9201 // The button is being released before we actually 9202 // showed it as pressed. Make it show the pressed 9203 // state now (before scheduling the click) to ensure 9204 // the user sees it. 9205 setPressed(true, x, y); 9206 } 9207 9208 if (!mHasPerformedLongPress) { 9209 // This is a tap, so remove the longpress check 9210 removeLongPressCallback(); 9211 9212 // Only perform take click actions if we were in the pressed state 9213 if (!focusTaken) { 9214 // Use a Runnable and post this rather than calling 9215 // performClick directly. This lets other visual state 9216 // of the view update before click actions start. 9217 if (mPerformClick == null) { 9218 mPerformClick = new PerformClick(); 9219 } 9220 if (!post(mPerformClick)) { 9221 performClick(); 9222 } 9223 } 9224 } 9225 9226 if (mUnsetPressedState == null) { 9227 mUnsetPressedState = new UnsetPressedState(); 9228 } 9229 9230 if (prepressed) { 9231 postDelayed(mUnsetPressedState, 9232 ViewConfiguration.getPressedStateDuration()); 9233 } else if (!post(mUnsetPressedState)) { 9234 // If the post failed, unpress right now 9235 mUnsetPressedState.run(); 9236 } 9237 9238 removeTapCallback(); 9239 } 9240 break; 9241 9242 case MotionEvent.ACTION_DOWN: 9243 mHasPerformedLongPress = false; 9244 9245 if (performButtonActionOnTouchDown(event)) { 9246 break; 9247 } 9248 9249 // Walk up the hierarchy to determine if we're inside a scrolling container. 9250 boolean isInScrollingContainer = isInScrollingContainer(); 9251 9252 // For views inside a scrolling container, delay the pressed feedback for 9253 // a short period in case this is a scroll. 9254 if (isInScrollingContainer) { 9255 mPrivateFlags |= PFLAG_PREPRESSED; 9256 if (mPendingCheckForTap == null) { 9257 mPendingCheckForTap = new CheckForTap(); 9258 } 9259 mPendingCheckForTap.x = event.getX(); 9260 mPendingCheckForTap.y = event.getY(); 9261 postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); 9262 } else { 9263 // Not inside a scrolling container, so show the feedback right away 9264 setPressed(true, x, y); 9265 checkForLongClick(0); 9266 } 9267 break; 9268 9269 case MotionEvent.ACTION_CANCEL: 9270 setPressed(false); 9271 removeTapCallback(); 9272 removeLongPressCallback(); 9273 break; 9274 9275 case MotionEvent.ACTION_MOVE: 9276 drawableHotspotChanged(x, y); 9277 9278 // Be lenient about moving outside of buttons 9279 if (!pointInView(x, y, mTouchSlop)) { 9280 // Outside button 9281 removeTapCallback(); 9282 if ((mPrivateFlags & PFLAG_PRESSED) != 0) { 9283 // Remove any future long press/tap checks 9284 removeLongPressCallback(); 9285 9286 setPressed(false); 9287 } 9288 } 9289 break; 9290 } 9291 9292 return true; 9293 } 9294 9295 return false; 9296 } 9297 9298 /** 9299 * @hide 9300 */ 9301 public boolean isInScrollingContainer() { 9302 ViewParent p = getParent(); 9303 while (p != null && p instanceof ViewGroup) { 9304 if (((ViewGroup) p).shouldDelayChildPressedState()) { 9305 return true; 9306 } 9307 p = p.getParent(); 9308 } 9309 return false; 9310 } 9311 9312 /** 9313 * Remove the longpress detection timer. 9314 */ 9315 private void removeLongPressCallback() { 9316 if (mPendingCheckForLongPress != null) { 9317 removeCallbacks(mPendingCheckForLongPress); 9318 } 9319 } 9320 9321 /** 9322 * Remove the pending click action 9323 */ 9324 private void removePerformClickCallback() { 9325 if (mPerformClick != null) { 9326 removeCallbacks(mPerformClick); 9327 } 9328 } 9329 9330 /** 9331 * Remove the prepress detection timer. 9332 */ 9333 private void removeUnsetPressCallback() { 9334 if ((mPrivateFlags & PFLAG_PRESSED) != 0 && mUnsetPressedState != null) { 9335 setPressed(false); 9336 removeCallbacks(mUnsetPressedState); 9337 } 9338 } 9339 9340 /** 9341 * Remove the tap detection timer. 9342 */ 9343 private void removeTapCallback() { 9344 if (mPendingCheckForTap != null) { 9345 mPrivateFlags &= ~PFLAG_PREPRESSED; 9346 removeCallbacks(mPendingCheckForTap); 9347 } 9348 } 9349 9350 /** 9351 * Cancels a pending long press. Your subclass can use this if you 9352 * want the context menu to come up if the user presses and holds 9353 * at the same place, but you don't want it to come up if they press 9354 * and then move around enough to cause scrolling. 9355 */ 9356 public void cancelLongPress() { 9357 removeLongPressCallback(); 9358 9359 /* 9360 * The prepressed state handled by the tap callback is a display 9361 * construct, but the tap callback will post a long press callback 9362 * less its own timeout. Remove it here. 9363 */ 9364 removeTapCallback(); 9365 } 9366 9367 /** 9368 * Remove the pending callback for sending a 9369 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 9370 */ 9371 private void removeSendViewScrolledAccessibilityEventCallback() { 9372 if (mSendViewScrolledAccessibilityEvent != null) { 9373 removeCallbacks(mSendViewScrolledAccessibilityEvent); 9374 mSendViewScrolledAccessibilityEvent.mIsPending = false; 9375 } 9376 } 9377 9378 /** 9379 * Sets the TouchDelegate for this View. 9380 */ 9381 public void setTouchDelegate(TouchDelegate delegate) { 9382 mTouchDelegate = delegate; 9383 } 9384 9385 /** 9386 * Gets the TouchDelegate for this View. 9387 */ 9388 public TouchDelegate getTouchDelegate() { 9389 return mTouchDelegate; 9390 } 9391 9392 /** 9393 * Request unbuffered dispatch of the given stream of MotionEvents to this View. 9394 * 9395 * Until this View receives a corresponding {@link MotionEvent#ACTION_UP}, ask that the input 9396 * system not batch {@link MotionEvent}s but instead deliver them as soon as they're 9397 * available. This method should only be called for touch events. 9398 * 9399 * <p class="note">This api is not intended for most applications. Buffered dispatch 9400 * provides many of benefits, and just requesting unbuffered dispatch on most MotionEvent 9401 * streams will not improve your input latency. Side effects include: increased latency, 9402 * jittery scrolls and inability to take advantage of system resampling. Talk to your input 9403 * professional to see if {@link #requestUnbufferedDispatch(MotionEvent)} is right for 9404 * you.</p> 9405 */ 9406 public final void requestUnbufferedDispatch(MotionEvent event) { 9407 final int action = event.getAction(); 9408 if (mAttachInfo == null 9409 || action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_MOVE 9410 || !event.isTouchEvent()) { 9411 return; 9412 } 9413 mAttachInfo.mUnbufferedDispatchRequested = true; 9414 } 9415 9416 /** 9417 * Set flags controlling behavior of this view. 9418 * 9419 * @param flags Constant indicating the value which should be set 9420 * @param mask Constant indicating the bit range that should be changed 9421 */ 9422 void setFlags(int flags, int mask) { 9423 final boolean accessibilityEnabled = 9424 AccessibilityManager.getInstance(mContext).isEnabled(); 9425 final boolean oldIncludeForAccessibility = accessibilityEnabled && includeForAccessibility(); 9426 9427 int old = mViewFlags; 9428 mViewFlags = (mViewFlags & ~mask) | (flags & mask); 9429 9430 int changed = mViewFlags ^ old; 9431 if (changed == 0) { 9432 return; 9433 } 9434 int privateFlags = mPrivateFlags; 9435 9436 /* Check if the FOCUSABLE bit has changed */ 9437 if (((changed & FOCUSABLE_MASK) != 0) && 9438 ((privateFlags & PFLAG_HAS_BOUNDS) !=0)) { 9439 if (((old & FOCUSABLE_MASK) == FOCUSABLE) 9440 && ((privateFlags & PFLAG_FOCUSED) != 0)) { 9441 /* Give up focus if we are no longer focusable */ 9442 clearFocus(); 9443 } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) 9444 && ((privateFlags & PFLAG_FOCUSED) == 0)) { 9445 /* 9446 * Tell the view system that we are now available to take focus 9447 * if no one else already has it. 9448 */ 9449 if (mParent != null) mParent.focusableViewAvailable(this); 9450 } 9451 } 9452 9453 final int newVisibility = flags & VISIBILITY_MASK; 9454 if (newVisibility == VISIBLE) { 9455 if ((changed & VISIBILITY_MASK) != 0) { 9456 /* 9457 * If this view is becoming visible, invalidate it in case it changed while 9458 * it was not visible. Marking it drawn ensures that the invalidation will 9459 * go through. 9460 */ 9461 mPrivateFlags |= PFLAG_DRAWN; 9462 invalidate(true); 9463 9464 needGlobalAttributesUpdate(true); 9465 9466 // a view becoming visible is worth notifying the parent 9467 // about in case nothing has focus. even if this specific view 9468 // isn't focusable, it may contain something that is, so let 9469 // the root view try to give this focus if nothing else does. 9470 if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { 9471 mParent.focusableViewAvailable(this); 9472 } 9473 } 9474 } 9475 9476 /* Check if the GONE bit has changed */ 9477 if ((changed & GONE) != 0) { 9478 needGlobalAttributesUpdate(false); 9479 requestLayout(); 9480 9481 if (((mViewFlags & VISIBILITY_MASK) == GONE)) { 9482 if (hasFocus()) clearFocus(); 9483 clearAccessibilityFocus(); 9484 destroyDrawingCache(); 9485 if (mParent instanceof View) { 9486 // GONE views noop invalidation, so invalidate the parent 9487 ((View) mParent).invalidate(true); 9488 } 9489 // Mark the view drawn to ensure that it gets invalidated properly the next 9490 // time it is visible and gets invalidated 9491 mPrivateFlags |= PFLAG_DRAWN; 9492 } 9493 if (mAttachInfo != null) { 9494 mAttachInfo.mViewVisibilityChanged = true; 9495 } 9496 } 9497 9498 /* Check if the VISIBLE bit has changed */ 9499 if ((changed & INVISIBLE) != 0) { 9500 needGlobalAttributesUpdate(false); 9501 /* 9502 * If this view is becoming invisible, set the DRAWN flag so that 9503 * the next invalidate() will not be skipped. 9504 */ 9505 mPrivateFlags |= PFLAG_DRAWN; 9506 9507 if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE)) { 9508 // root view becoming invisible shouldn't clear focus and accessibility focus 9509 if (getRootView() != this) { 9510 if (hasFocus()) clearFocus(); 9511 clearAccessibilityFocus(); 9512 } 9513 } 9514 if (mAttachInfo != null) { 9515 mAttachInfo.mViewVisibilityChanged = true; 9516 } 9517 } 9518 9519 if ((changed & VISIBILITY_MASK) != 0) { 9520 // If the view is invisible, cleanup its display list to free up resources 9521 if (newVisibility != VISIBLE && mAttachInfo != null) { 9522 cleanupDraw(); 9523 } 9524 9525 if (mParent instanceof ViewGroup) { 9526 ((ViewGroup) mParent).onChildVisibilityChanged(this, 9527 (changed & VISIBILITY_MASK), newVisibility); 9528 ((View) mParent).invalidate(true); 9529 } else if (mParent != null) { 9530 mParent.invalidateChild(this, null); 9531 } 9532 dispatchVisibilityChanged(this, newVisibility); 9533 9534 notifySubtreeAccessibilityStateChangedIfNeeded(); 9535 } 9536 9537 if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { 9538 destroyDrawingCache(); 9539 } 9540 9541 if ((changed & DRAWING_CACHE_ENABLED) != 0) { 9542 destroyDrawingCache(); 9543 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 9544 invalidateParentCaches(); 9545 } 9546 9547 if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { 9548 destroyDrawingCache(); 9549 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 9550 } 9551 9552 if ((changed & DRAW_MASK) != 0) { 9553 if ((mViewFlags & WILL_NOT_DRAW) != 0) { 9554 if (mBackground != null) { 9555 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 9556 mPrivateFlags |= PFLAG_ONLY_DRAWS_BACKGROUND; 9557 } else { 9558 mPrivateFlags |= PFLAG_SKIP_DRAW; 9559 } 9560 } else { 9561 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 9562 } 9563 requestLayout(); 9564 invalidate(true); 9565 } 9566 9567 if ((changed & KEEP_SCREEN_ON) != 0) { 9568 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 9569 mParent.recomputeViewAttributes(this); 9570 } 9571 } 9572 9573 if (accessibilityEnabled) { 9574 if ((changed & FOCUSABLE_MASK) != 0 || (changed & VISIBILITY_MASK) != 0 9575 || (changed & CLICKABLE) != 0 || (changed & LONG_CLICKABLE) != 0) { 9576 if (oldIncludeForAccessibility != includeForAccessibility()) { 9577 notifySubtreeAccessibilityStateChangedIfNeeded(); 9578 } else { 9579 notifyViewAccessibilityStateChangedIfNeeded( 9580 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 9581 } 9582 } else if ((changed & ENABLED_MASK) != 0) { 9583 notifyViewAccessibilityStateChangedIfNeeded( 9584 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 9585 } 9586 } 9587 } 9588 9589 /** 9590 * Change the view's z order in the tree, so it's on top of other sibling 9591 * views. This ordering change may affect layout, if the parent container 9592 * uses an order-dependent layout scheme (e.g., LinearLayout). Prior 9593 * to {@link android.os.Build.VERSION_CODES#KITKAT} this 9594 * method should be followed by calls to {@link #requestLayout()} and 9595 * {@link View#invalidate()} on the view's parent to force the parent to redraw 9596 * with the new child ordering. 9597 * 9598 * @see ViewGroup#bringChildToFront(View) 9599 */ 9600 public void bringToFront() { 9601 if (mParent != null) { 9602 mParent.bringChildToFront(this); 9603 } 9604 } 9605 9606 /** 9607 * This is called in response to an internal scroll in this view (i.e., the 9608 * view scrolled its own contents). This is typically as a result of 9609 * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been 9610 * called. 9611 * 9612 * @param l Current horizontal scroll origin. 9613 * @param t Current vertical scroll origin. 9614 * @param oldl Previous horizontal scroll origin. 9615 * @param oldt Previous vertical scroll origin. 9616 */ 9617 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 9618 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 9619 postSendViewScrolledAccessibilityEventCallback(); 9620 } 9621 9622 mBackgroundSizeChanged = true; 9623 9624 final AttachInfo ai = mAttachInfo; 9625 if (ai != null) { 9626 ai.mViewScrollChanged = true; 9627 } 9628 } 9629 9630 /** 9631 * Interface definition for a callback to be invoked when the layout bounds of a view 9632 * changes due to layout processing. 9633 */ 9634 public interface OnLayoutChangeListener { 9635 /** 9636 * Called when the layout bounds of a view changes due to layout processing. 9637 * 9638 * @param v The view whose bounds have changed. 9639 * @param left The new value of the view's left property. 9640 * @param top The new value of the view's top property. 9641 * @param right The new value of the view's right property. 9642 * @param bottom The new value of the view's bottom property. 9643 * @param oldLeft The previous value of the view's left property. 9644 * @param oldTop The previous value of the view's top property. 9645 * @param oldRight The previous value of the view's right property. 9646 * @param oldBottom The previous value of the view's bottom property. 9647 */ 9648 void onLayoutChange(View v, int left, int top, int right, int bottom, 9649 int oldLeft, int oldTop, int oldRight, int oldBottom); 9650 } 9651 9652 /** 9653 * This is called during layout when the size of this view has changed. If 9654 * you were just added to the view hierarchy, you're called with the old 9655 * values of 0. 9656 * 9657 * @param w Current width of this view. 9658 * @param h Current height of this view. 9659 * @param oldw Old width of this view. 9660 * @param oldh Old height of this view. 9661 */ 9662 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 9663 } 9664 9665 /** 9666 * Called by draw to draw the child views. This may be overridden 9667 * by derived classes to gain control just before its children are drawn 9668 * (but after its own view has been drawn). 9669 * @param canvas the canvas on which to draw the view 9670 */ 9671 protected void dispatchDraw(Canvas canvas) { 9672 9673 } 9674 9675 /** 9676 * Gets the parent of this view. Note that the parent is a 9677 * ViewParent and not necessarily a View. 9678 * 9679 * @return Parent of this view. 9680 */ 9681 public final ViewParent getParent() { 9682 return mParent; 9683 } 9684 9685 /** 9686 * Set the horizontal scrolled position of your view. This will cause a call to 9687 * {@link #onScrollChanged(int, int, int, int)} and the view will be 9688 * invalidated. 9689 * @param value the x position to scroll to 9690 */ 9691 public void setScrollX(int value) { 9692 scrollTo(value, mScrollY); 9693 } 9694 9695 /** 9696 * Set the vertical scrolled position of your view. This will cause a call to 9697 * {@link #onScrollChanged(int, int, int, int)} and the view will be 9698 * invalidated. 9699 * @param value the y position to scroll to 9700 */ 9701 public void setScrollY(int value) { 9702 scrollTo(mScrollX, value); 9703 } 9704 9705 /** 9706 * Return the scrolled left position of this view. This is the left edge of 9707 * the displayed part of your view. You do not need to draw any pixels 9708 * farther left, since those are outside of the frame of your view on 9709 * screen. 9710 * 9711 * @return The left edge of the displayed part of your view, in pixels. 9712 */ 9713 public final int getScrollX() { 9714 return mScrollX; 9715 } 9716 9717 /** 9718 * Return the scrolled top position of this view. This is the top edge of 9719 * the displayed part of your view. You do not need to draw any pixels above 9720 * it, since those are outside of the frame of your view on screen. 9721 * 9722 * @return The top edge of the displayed part of your view, in pixels. 9723 */ 9724 public final int getScrollY() { 9725 return mScrollY; 9726 } 9727 9728 /** 9729 * Return the width of the your view. 9730 * 9731 * @return The width of your view, in pixels. 9732 */ 9733 @ViewDebug.ExportedProperty(category = "layout") 9734 public final int getWidth() { 9735 return mRight - mLeft; 9736 } 9737 9738 /** 9739 * Return the height of your view. 9740 * 9741 * @return The height of your view, in pixels. 9742 */ 9743 @ViewDebug.ExportedProperty(category = "layout") 9744 public final int getHeight() { 9745 return mBottom - mTop; 9746 } 9747 9748 /** 9749 * Return the visible drawing bounds of your view. Fills in the output 9750 * rectangle with the values from getScrollX(), getScrollY(), 9751 * getWidth(), and getHeight(). These bounds do not account for any 9752 * transformation properties currently set on the view, such as 9753 * {@link #setScaleX(float)} or {@link #setRotation(float)}. 9754 * 9755 * @param outRect The (scrolled) drawing bounds of the view. 9756 */ 9757 public void getDrawingRect(Rect outRect) { 9758 outRect.left = mScrollX; 9759 outRect.top = mScrollY; 9760 outRect.right = mScrollX + (mRight - mLeft); 9761 outRect.bottom = mScrollY + (mBottom - mTop); 9762 } 9763 9764 /** 9765 * Like {@link #getMeasuredWidthAndState()}, but only returns the 9766 * raw width component (that is the result is masked by 9767 * {@link #MEASURED_SIZE_MASK}). 9768 * 9769 * @return The raw measured width of this view. 9770 */ 9771 public final int getMeasuredWidth() { 9772 return mMeasuredWidth & MEASURED_SIZE_MASK; 9773 } 9774 9775 /** 9776 * Return the full width measurement information for this view as computed 9777 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 9778 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 9779 * This should be used during measurement and layout calculations only. Use 9780 * {@link #getWidth()} to see how wide a view is after layout. 9781 * 9782 * @return The measured width of this view as a bit mask. 9783 */ 9784 public final int getMeasuredWidthAndState() { 9785 return mMeasuredWidth; 9786 } 9787 9788 /** 9789 * Like {@link #getMeasuredHeightAndState()}, but only returns the 9790 * raw width component (that is the result is masked by 9791 * {@link #MEASURED_SIZE_MASK}). 9792 * 9793 * @return The raw measured height of this view. 9794 */ 9795 public final int getMeasuredHeight() { 9796 return mMeasuredHeight & MEASURED_SIZE_MASK; 9797 } 9798 9799 /** 9800 * Return the full height measurement information for this view as computed 9801 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 9802 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 9803 * This should be used during measurement and layout calculations only. Use 9804 * {@link #getHeight()} to see how wide a view is after layout. 9805 * 9806 * @return The measured width of this view as a bit mask. 9807 */ 9808 public final int getMeasuredHeightAndState() { 9809 return mMeasuredHeight; 9810 } 9811 9812 /** 9813 * Return only the state bits of {@link #getMeasuredWidthAndState()} 9814 * and {@link #getMeasuredHeightAndState()}, combined into one integer. 9815 * The width component is in the regular bits {@link #MEASURED_STATE_MASK} 9816 * and the height component is at the shifted bits 9817 * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. 9818 */ 9819 public final int getMeasuredState() { 9820 return (mMeasuredWidth&MEASURED_STATE_MASK) 9821 | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) 9822 & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); 9823 } 9824 9825 /** 9826 * The transform matrix of this view, which is calculated based on the current 9827 * rotation, scale, and pivot properties. 9828 * 9829 * @see #getRotation() 9830 * @see #getScaleX() 9831 * @see #getScaleY() 9832 * @see #getPivotX() 9833 * @see #getPivotY() 9834 * @return The current transform matrix for the view 9835 */ 9836 public Matrix getMatrix() { 9837 ensureTransformationInfo(); 9838 final Matrix matrix = mTransformationInfo.mMatrix; 9839 mRenderNode.getMatrix(matrix); 9840 return matrix; 9841 } 9842 9843 /** 9844 * Returns true if the transform matrix is the identity matrix. 9845 * Recomputes the matrix if necessary. 9846 * 9847 * @return True if the transform matrix is the identity matrix, false otherwise. 9848 */ 9849 final boolean hasIdentityMatrix() { 9850 return mRenderNode.hasIdentityMatrix(); 9851 } 9852 9853 void ensureTransformationInfo() { 9854 if (mTransformationInfo == null) { 9855 mTransformationInfo = new TransformationInfo(); 9856 } 9857 } 9858 9859 /** 9860 * Utility method to retrieve the inverse of the current mMatrix property. 9861 * We cache the matrix to avoid recalculating it when transform properties 9862 * have not changed. 9863 * 9864 * @return The inverse of the current matrix of this view. 9865 * @hide 9866 */ 9867 public final Matrix getInverseMatrix() { 9868 ensureTransformationInfo(); 9869 if (mTransformationInfo.mInverseMatrix == null) { 9870 mTransformationInfo.mInverseMatrix = new Matrix(); 9871 } 9872 final Matrix matrix = mTransformationInfo.mInverseMatrix; 9873 mRenderNode.getInverseMatrix(matrix); 9874 return matrix; 9875 } 9876 9877 /** 9878 * Gets the distance along the Z axis from the camera to this view. 9879 * 9880 * @see #setCameraDistance(float) 9881 * 9882 * @return The distance along the Z axis. 9883 */ 9884 public float getCameraDistance() { 9885 final float dpi = mResources.getDisplayMetrics().densityDpi; 9886 return -(mRenderNode.getCameraDistance() * dpi); 9887 } 9888 9889 /** 9890 * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which 9891 * views are drawn) from the camera to this view. The camera's distance 9892 * affects 3D transformations, for instance rotations around the X and Y 9893 * axis. If the rotationX or rotationY properties are changed and this view is 9894 * large (more than half the size of the screen), it is recommended to always 9895 * use a camera distance that's greater than the height (X axis rotation) or 9896 * the width (Y axis rotation) of this view.</p> 9897 * 9898 * <p>The distance of the camera from the view plane can have an affect on the 9899 * perspective distortion of the view when it is rotated around the x or y axis. 9900 * For example, a large distance will result in a large viewing angle, and there 9901 * will not be much perspective distortion of the view as it rotates. A short 9902 * distance may cause much more perspective distortion upon rotation, and can 9903 * also result in some drawing artifacts if the rotated view ends up partially 9904 * behind the camera (which is why the recommendation is to use a distance at 9905 * least as far as the size of the view, if the view is to be rotated.)</p> 9906 * 9907 * <p>The distance is expressed in "depth pixels." The default distance depends 9908 * on the screen density. For instance, on a medium density display, the 9909 * default distance is 1280. On a high density display, the default distance 9910 * is 1920.</p> 9911 * 9912 * <p>If you want to specify a distance that leads to visually consistent 9913 * results across various densities, use the following formula:</p> 9914 * <pre> 9915 * float scale = context.getResources().getDisplayMetrics().density; 9916 * view.setCameraDistance(distance * scale); 9917 * </pre> 9918 * 9919 * <p>The density scale factor of a high density display is 1.5, 9920 * and 1920 = 1280 * 1.5.</p> 9921 * 9922 * @param distance The distance in "depth pixels", if negative the opposite 9923 * value is used 9924 * 9925 * @see #setRotationX(float) 9926 * @see #setRotationY(float) 9927 */ 9928 public void setCameraDistance(float distance) { 9929 final float dpi = mResources.getDisplayMetrics().densityDpi; 9930 9931 invalidateViewProperty(true, false); 9932 mRenderNode.setCameraDistance(-Math.abs(distance) / dpi); 9933 invalidateViewProperty(false, false); 9934 9935 invalidateParentIfNeededAndWasQuickRejected(); 9936 } 9937 9938 /** 9939 * The degrees that the view is rotated around the pivot point. 9940 * 9941 * @see #setRotation(float) 9942 * @see #getPivotX() 9943 * @see #getPivotY() 9944 * 9945 * @return The degrees of rotation. 9946 */ 9947 @ViewDebug.ExportedProperty(category = "drawing") 9948 public float getRotation() { 9949 return mRenderNode.getRotation(); 9950 } 9951 9952 /** 9953 * Sets the degrees that the view is rotated around the pivot point. Increasing values 9954 * result in clockwise rotation. 9955 * 9956 * @param rotation The degrees of rotation. 9957 * 9958 * @see #getRotation() 9959 * @see #getPivotX() 9960 * @see #getPivotY() 9961 * @see #setRotationX(float) 9962 * @see #setRotationY(float) 9963 * 9964 * @attr ref android.R.styleable#View_rotation 9965 */ 9966 public void setRotation(float rotation) { 9967 if (rotation != getRotation()) { 9968 // Double-invalidation is necessary to capture view's old and new areas 9969 invalidateViewProperty(true, false); 9970 mRenderNode.setRotation(rotation); 9971 invalidateViewProperty(false, true); 9972 9973 invalidateParentIfNeededAndWasQuickRejected(); 9974 notifySubtreeAccessibilityStateChangedIfNeeded(); 9975 } 9976 } 9977 9978 /** 9979 * The degrees that the view is rotated around the vertical axis through the pivot point. 9980 * 9981 * @see #getPivotX() 9982 * @see #getPivotY() 9983 * @see #setRotationY(float) 9984 * 9985 * @return The degrees of Y rotation. 9986 */ 9987 @ViewDebug.ExportedProperty(category = "drawing") 9988 public float getRotationY() { 9989 return mRenderNode.getRotationY(); 9990 } 9991 9992 /** 9993 * Sets the degrees that the view is rotated around the vertical axis through the pivot point. 9994 * Increasing values result in counter-clockwise rotation from the viewpoint of looking 9995 * down the y axis. 9996 * 9997 * When rotating large views, it is recommended to adjust the camera distance 9998 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 9999 * 10000 * @param rotationY The degrees of Y rotation. 10001 * 10002 * @see #getRotationY() 10003 * @see #getPivotX() 10004 * @see #getPivotY() 10005 * @see #setRotation(float) 10006 * @see #setRotationX(float) 10007 * @see #setCameraDistance(float) 10008 * 10009 * @attr ref android.R.styleable#View_rotationY 10010 */ 10011 public void setRotationY(float rotationY) { 10012 if (rotationY != getRotationY()) { 10013 invalidateViewProperty(true, false); 10014 mRenderNode.setRotationY(rotationY); 10015 invalidateViewProperty(false, true); 10016 10017 invalidateParentIfNeededAndWasQuickRejected(); 10018 notifySubtreeAccessibilityStateChangedIfNeeded(); 10019 } 10020 } 10021 10022 /** 10023 * The degrees that the view is rotated around the horizontal axis through the pivot point. 10024 * 10025 * @see #getPivotX() 10026 * @see #getPivotY() 10027 * @see #setRotationX(float) 10028 * 10029 * @return The degrees of X rotation. 10030 */ 10031 @ViewDebug.ExportedProperty(category = "drawing") 10032 public float getRotationX() { 10033 return mRenderNode.getRotationX(); 10034 } 10035 10036 /** 10037 * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. 10038 * Increasing values result in clockwise rotation from the viewpoint of looking down the 10039 * x axis. 10040 * 10041 * When rotating large views, it is recommended to adjust the camera distance 10042 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 10043 * 10044 * @param rotationX The degrees of X rotation. 10045 * 10046 * @see #getRotationX() 10047 * @see #getPivotX() 10048 * @see #getPivotY() 10049 * @see #setRotation(float) 10050 * @see #setRotationY(float) 10051 * @see #setCameraDistance(float) 10052 * 10053 * @attr ref android.R.styleable#View_rotationX 10054 */ 10055 public void setRotationX(float rotationX) { 10056 if (rotationX != getRotationX()) { 10057 invalidateViewProperty(true, false); 10058 mRenderNode.setRotationX(rotationX); 10059 invalidateViewProperty(false, true); 10060 10061 invalidateParentIfNeededAndWasQuickRejected(); 10062 notifySubtreeAccessibilityStateChangedIfNeeded(); 10063 } 10064 } 10065 10066 /** 10067 * The amount that the view is scaled in x around the pivot point, as a proportion of 10068 * the view's unscaled width. A value of 1, the default, means that no scaling is applied. 10069 * 10070 * <p>By default, this is 1.0f. 10071 * 10072 * @see #getPivotX() 10073 * @see #getPivotY() 10074 * @return The scaling factor. 10075 */ 10076 @ViewDebug.ExportedProperty(category = "drawing") 10077 public float getScaleX() { 10078 return mRenderNode.getScaleX(); 10079 } 10080 10081 /** 10082 * Sets the amount that the view is scaled in x around the pivot point, as a proportion of 10083 * the view's unscaled width. A value of 1 means that no scaling is applied. 10084 * 10085 * @param scaleX The scaling factor. 10086 * @see #getPivotX() 10087 * @see #getPivotY() 10088 * 10089 * @attr ref android.R.styleable#View_scaleX 10090 */ 10091 public void setScaleX(float scaleX) { 10092 if (scaleX != getScaleX()) { 10093 invalidateViewProperty(true, false); 10094 mRenderNode.setScaleX(scaleX); 10095 invalidateViewProperty(false, true); 10096 10097 invalidateParentIfNeededAndWasQuickRejected(); 10098 notifySubtreeAccessibilityStateChangedIfNeeded(); 10099 } 10100 } 10101 10102 /** 10103 * The amount that the view is scaled in y around the pivot point, as a proportion of 10104 * the view's unscaled height. A value of 1, the default, means that no scaling is applied. 10105 * 10106 * <p>By default, this is 1.0f. 10107 * 10108 * @see #getPivotX() 10109 * @see #getPivotY() 10110 * @return The scaling factor. 10111 */ 10112 @ViewDebug.ExportedProperty(category = "drawing") 10113 public float getScaleY() { 10114 return mRenderNode.getScaleY(); 10115 } 10116 10117 /** 10118 * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of 10119 * the view's unscaled width. A value of 1 means that no scaling is applied. 10120 * 10121 * @param scaleY The scaling factor. 10122 * @see #getPivotX() 10123 * @see #getPivotY() 10124 * 10125 * @attr ref android.R.styleable#View_scaleY 10126 */ 10127 public void setScaleY(float scaleY) { 10128 if (scaleY != getScaleY()) { 10129 invalidateViewProperty(true, false); 10130 mRenderNode.setScaleY(scaleY); 10131 invalidateViewProperty(false, true); 10132 10133 invalidateParentIfNeededAndWasQuickRejected(); 10134 notifySubtreeAccessibilityStateChangedIfNeeded(); 10135 } 10136 } 10137 10138 /** 10139 * The x location of the point around which the view is {@link #setRotation(float) rotated} 10140 * and {@link #setScaleX(float) scaled}. 10141 * 10142 * @see #getRotation() 10143 * @see #getScaleX() 10144 * @see #getScaleY() 10145 * @see #getPivotY() 10146 * @return The x location of the pivot point. 10147 * 10148 * @attr ref android.R.styleable#View_transformPivotX 10149 */ 10150 @ViewDebug.ExportedProperty(category = "drawing") 10151 public float getPivotX() { 10152 return mRenderNode.getPivotX(); 10153 } 10154 10155 /** 10156 * Sets the x location of the point around which the view is 10157 * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. 10158 * By default, the pivot point is centered on the object. 10159 * Setting this property disables this behavior and causes the view to use only the 10160 * explicitly set pivotX and pivotY values. 10161 * 10162 * @param pivotX The x location of the pivot point. 10163 * @see #getRotation() 10164 * @see #getScaleX() 10165 * @see #getScaleY() 10166 * @see #getPivotY() 10167 * 10168 * @attr ref android.R.styleable#View_transformPivotX 10169 */ 10170 public void setPivotX(float pivotX) { 10171 if (!mRenderNode.isPivotExplicitlySet() || pivotX != getPivotX()) { 10172 invalidateViewProperty(true, false); 10173 mRenderNode.setPivotX(pivotX); 10174 invalidateViewProperty(false, true); 10175 10176 invalidateParentIfNeededAndWasQuickRejected(); 10177 } 10178 } 10179 10180 /** 10181 * The y location of the point around which the view is {@link #setRotation(float) rotated} 10182 * and {@link #setScaleY(float) scaled}. 10183 * 10184 * @see #getRotation() 10185 * @see #getScaleX() 10186 * @see #getScaleY() 10187 * @see #getPivotY() 10188 * @return The y location of the pivot point. 10189 * 10190 * @attr ref android.R.styleable#View_transformPivotY 10191 */ 10192 @ViewDebug.ExportedProperty(category = "drawing") 10193 public float getPivotY() { 10194 return mRenderNode.getPivotY(); 10195 } 10196 10197 /** 10198 * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} 10199 * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. 10200 * Setting this property disables this behavior and causes the view to use only the 10201 * explicitly set pivotX and pivotY values. 10202 * 10203 * @param pivotY The y location of the pivot point. 10204 * @see #getRotation() 10205 * @see #getScaleX() 10206 * @see #getScaleY() 10207 * @see #getPivotY() 10208 * 10209 * @attr ref android.R.styleable#View_transformPivotY 10210 */ 10211 public void setPivotY(float pivotY) { 10212 if (!mRenderNode.isPivotExplicitlySet() || pivotY != getPivotY()) { 10213 invalidateViewProperty(true, false); 10214 mRenderNode.setPivotY(pivotY); 10215 invalidateViewProperty(false, true); 10216 10217 invalidateParentIfNeededAndWasQuickRejected(); 10218 } 10219 } 10220 10221 /** 10222 * The opacity of the view. This is a value from 0 to 1, where 0 means the view is 10223 * completely transparent and 1 means the view is completely opaque. 10224 * 10225 * <p>By default this is 1.0f. 10226 * @return The opacity of the view. 10227 */ 10228 @ViewDebug.ExportedProperty(category = "drawing") 10229 public float getAlpha() { 10230 return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; 10231 } 10232 10233 /** 10234 * Returns whether this View has content which overlaps. 10235 * 10236 * <p>This function, intended to be overridden by specific View types, is an optimization when 10237 * alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to 10238 * an offscreen buffer and then composited into place, which can be expensive. If the view has 10239 * no overlapping rendering, the view can draw each primitive with the appropriate alpha value 10240 * directly. An example of overlapping rendering is a TextView with a background image, such as 10241 * a Button. An example of non-overlapping rendering is a TextView with no background, or an 10242 * ImageView with only the foreground image. The default implementation returns true; subclasses 10243 * should override if they have cases which can be optimized.</p> 10244 * 10245 * <p>The current implementation of the saveLayer and saveLayerAlpha methods in {@link Canvas} 10246 * necessitates that a View return true if it uses the methods internally without passing the 10247 * {@link Canvas#CLIP_TO_LAYER_SAVE_FLAG}.</p> 10248 * 10249 * @return true if the content in this view might overlap, false otherwise. 10250 */ 10251 public boolean hasOverlappingRendering() { 10252 return true; 10253 } 10254 10255 /** 10256 * <p>Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is 10257 * completely transparent and 1 means the view is completely opaque.</p> 10258 * 10259 * <p> Note that setting alpha to a translucent value (0 < alpha < 1) can have significant 10260 * performance implications, especially for large views. It is best to use the alpha property 10261 * sparingly and transiently, as in the case of fading animations.</p> 10262 * 10263 * <p>For a view with a frequently changing alpha, such as during a fading animation, it is 10264 * strongly recommended for performance reasons to either override 10265 * {@link #hasOverlappingRendering()} to return false if appropriate, or setting a 10266 * {@link #setLayerType(int, android.graphics.Paint) layer type} on the view.</p> 10267 * 10268 * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is 10269 * responsible for applying the opacity itself.</p> 10270 * 10271 * <p>Note that if the view is backed by a 10272 * {@link #setLayerType(int, android.graphics.Paint) layer} and is associated with a 10273 * {@link #setLayerPaint(android.graphics.Paint) layer paint}, setting an alpha value less than 10274 * 1.0 will supercede the alpha of the layer paint.</p> 10275 * 10276 * @param alpha The opacity of the view. 10277 * 10278 * @see #hasOverlappingRendering() 10279 * @see #setLayerType(int, android.graphics.Paint) 10280 * 10281 * @attr ref android.R.styleable#View_alpha 10282 */ 10283 public void setAlpha(float alpha) { 10284 ensureTransformationInfo(); 10285 if (mTransformationInfo.mAlpha != alpha) { 10286 mTransformationInfo.mAlpha = alpha; 10287 if (onSetAlpha((int) (alpha * 255))) { 10288 mPrivateFlags |= PFLAG_ALPHA_SET; 10289 // subclass is handling alpha - don't optimize rendering cache invalidation 10290 invalidateParentCaches(); 10291 invalidate(true); 10292 } else { 10293 mPrivateFlags &= ~PFLAG_ALPHA_SET; 10294 invalidateViewProperty(true, false); 10295 mRenderNode.setAlpha(getFinalAlpha()); 10296 notifyViewAccessibilityStateChangedIfNeeded( 10297 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 10298 } 10299 } 10300 } 10301 10302 /** 10303 * Faster version of setAlpha() which performs the same steps except there are 10304 * no calls to invalidate(). The caller of this function should perform proper invalidation 10305 * on the parent and this object. The return value indicates whether the subclass handles 10306 * alpha (the return value for onSetAlpha()). 10307 * 10308 * @param alpha The new value for the alpha property 10309 * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and 10310 * the new value for the alpha property is different from the old value 10311 */ 10312 boolean setAlphaNoInvalidation(float alpha) { 10313 ensureTransformationInfo(); 10314 if (mTransformationInfo.mAlpha != alpha) { 10315 mTransformationInfo.mAlpha = alpha; 10316 boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); 10317 if (subclassHandlesAlpha) { 10318 mPrivateFlags |= PFLAG_ALPHA_SET; 10319 return true; 10320 } else { 10321 mPrivateFlags &= ~PFLAG_ALPHA_SET; 10322 mRenderNode.setAlpha(getFinalAlpha()); 10323 } 10324 } 10325 return false; 10326 } 10327 10328 /** 10329 * This property is hidden and intended only for use by the Fade transition, which 10330 * animates it to produce a visual translucency that does not side-effect (or get 10331 * affected by) the real alpha property. This value is composited with the other 10332 * alpha value (and the AlphaAnimation value, when that is present) to produce 10333 * a final visual translucency result, which is what is passed into the DisplayList. 10334 * 10335 * @hide 10336 */ 10337 public void setTransitionAlpha(float alpha) { 10338 ensureTransformationInfo(); 10339 if (mTransformationInfo.mTransitionAlpha != alpha) { 10340 mTransformationInfo.mTransitionAlpha = alpha; 10341 mPrivateFlags &= ~PFLAG_ALPHA_SET; 10342 invalidateViewProperty(true, false); 10343 mRenderNode.setAlpha(getFinalAlpha()); 10344 } 10345 } 10346 10347 /** 10348 * Calculates the visual alpha of this view, which is a combination of the actual 10349 * alpha value and the transitionAlpha value (if set). 10350 */ 10351 private float getFinalAlpha() { 10352 if (mTransformationInfo != null) { 10353 return mTransformationInfo.mAlpha * mTransformationInfo.mTransitionAlpha; 10354 } 10355 return 1; 10356 } 10357 10358 /** 10359 * This property is hidden and intended only for use by the Fade transition, which 10360 * animates it to produce a visual translucency that does not side-effect (or get 10361 * affected by) the real alpha property. This value is composited with the other 10362 * alpha value (and the AlphaAnimation value, when that is present) to produce 10363 * a final visual translucency result, which is what is passed into the DisplayList. 10364 * 10365 * @hide 10366 */ 10367 @ViewDebug.ExportedProperty(category = "drawing") 10368 public float getTransitionAlpha() { 10369 return mTransformationInfo != null ? mTransformationInfo.mTransitionAlpha : 1; 10370 } 10371 10372 /** 10373 * Top position of this view relative to its parent. 10374 * 10375 * @return The top of this view, in pixels. 10376 */ 10377 @ViewDebug.CapturedViewProperty 10378 public final int getTop() { 10379 return mTop; 10380 } 10381 10382 /** 10383 * Sets the top position of this view relative to its parent. This method is meant to be called 10384 * by the layout system and should not generally be called otherwise, because the property 10385 * may be changed at any time by the layout. 10386 * 10387 * @param top The top of this view, in pixels. 10388 */ 10389 public final void setTop(int top) { 10390 if (top != mTop) { 10391 final boolean matrixIsIdentity = hasIdentityMatrix(); 10392 if (matrixIsIdentity) { 10393 if (mAttachInfo != null) { 10394 int minTop; 10395 int yLoc; 10396 if (top < mTop) { 10397 minTop = top; 10398 yLoc = top - mTop; 10399 } else { 10400 minTop = mTop; 10401 yLoc = 0; 10402 } 10403 invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); 10404 } 10405 } else { 10406 // Double-invalidation is necessary to capture view's old and new areas 10407 invalidate(true); 10408 } 10409 10410 int width = mRight - mLeft; 10411 int oldHeight = mBottom - mTop; 10412 10413 mTop = top; 10414 mRenderNode.setTop(mTop); 10415 10416 sizeChange(width, mBottom - mTop, width, oldHeight); 10417 10418 if (!matrixIsIdentity) { 10419 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10420 invalidate(true); 10421 } 10422 mBackgroundSizeChanged = true; 10423 invalidateParentIfNeeded(); 10424 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10425 // View was rejected last time it was drawn by its parent; this may have changed 10426 invalidateParentIfNeeded(); 10427 } 10428 } 10429 } 10430 10431 /** 10432 * Bottom position of this view relative to its parent. 10433 * 10434 * @return The bottom of this view, in pixels. 10435 */ 10436 @ViewDebug.CapturedViewProperty 10437 public final int getBottom() { 10438 return mBottom; 10439 } 10440 10441 /** 10442 * True if this view has changed since the last time being drawn. 10443 * 10444 * @return The dirty state of this view. 10445 */ 10446 public boolean isDirty() { 10447 return (mPrivateFlags & PFLAG_DIRTY_MASK) != 0; 10448 } 10449 10450 /** 10451 * Sets the bottom position of this view relative to its parent. This method is meant to be 10452 * called by the layout system and should not generally be called otherwise, because the 10453 * property may be changed at any time by the layout. 10454 * 10455 * @param bottom The bottom of this view, in pixels. 10456 */ 10457 public final void setBottom(int bottom) { 10458 if (bottom != mBottom) { 10459 final boolean matrixIsIdentity = hasIdentityMatrix(); 10460 if (matrixIsIdentity) { 10461 if (mAttachInfo != null) { 10462 int maxBottom; 10463 if (bottom < mBottom) { 10464 maxBottom = mBottom; 10465 } else { 10466 maxBottom = bottom; 10467 } 10468 invalidate(0, 0, mRight - mLeft, maxBottom - mTop); 10469 } 10470 } else { 10471 // Double-invalidation is necessary to capture view's old and new areas 10472 invalidate(true); 10473 } 10474 10475 int width = mRight - mLeft; 10476 int oldHeight = mBottom - mTop; 10477 10478 mBottom = bottom; 10479 mRenderNode.setBottom(mBottom); 10480 10481 sizeChange(width, mBottom - mTop, width, oldHeight); 10482 10483 if (!matrixIsIdentity) { 10484 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10485 invalidate(true); 10486 } 10487 mBackgroundSizeChanged = true; 10488 invalidateParentIfNeeded(); 10489 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10490 // View was rejected last time it was drawn by its parent; this may have changed 10491 invalidateParentIfNeeded(); 10492 } 10493 } 10494 } 10495 10496 /** 10497 * Left position of this view relative to its parent. 10498 * 10499 * @return The left edge of this view, in pixels. 10500 */ 10501 @ViewDebug.CapturedViewProperty 10502 public final int getLeft() { 10503 return mLeft; 10504 } 10505 10506 /** 10507 * Sets the left position of this view relative to its parent. This method is meant to be called 10508 * by the layout system and should not generally be called otherwise, because the property 10509 * may be changed at any time by the layout. 10510 * 10511 * @param left The left of this view, in pixels. 10512 */ 10513 public final void setLeft(int left) { 10514 if (left != mLeft) { 10515 final boolean matrixIsIdentity = hasIdentityMatrix(); 10516 if (matrixIsIdentity) { 10517 if (mAttachInfo != null) { 10518 int minLeft; 10519 int xLoc; 10520 if (left < mLeft) { 10521 minLeft = left; 10522 xLoc = left - mLeft; 10523 } else { 10524 minLeft = mLeft; 10525 xLoc = 0; 10526 } 10527 invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); 10528 } 10529 } else { 10530 // Double-invalidation is necessary to capture view's old and new areas 10531 invalidate(true); 10532 } 10533 10534 int oldWidth = mRight - mLeft; 10535 int height = mBottom - mTop; 10536 10537 mLeft = left; 10538 mRenderNode.setLeft(left); 10539 10540 sizeChange(mRight - mLeft, height, oldWidth, height); 10541 10542 if (!matrixIsIdentity) { 10543 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10544 invalidate(true); 10545 } 10546 mBackgroundSizeChanged = true; 10547 invalidateParentIfNeeded(); 10548 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10549 // View was rejected last time it was drawn by its parent; this may have changed 10550 invalidateParentIfNeeded(); 10551 } 10552 } 10553 } 10554 10555 /** 10556 * Right position of this view relative to its parent. 10557 * 10558 * @return The right edge of this view, in pixels. 10559 */ 10560 @ViewDebug.CapturedViewProperty 10561 public final int getRight() { 10562 return mRight; 10563 } 10564 10565 /** 10566 * Sets the right position of this view relative to its parent. This method is meant to be called 10567 * by the layout system and should not generally be called otherwise, because the property 10568 * may be changed at any time by the layout. 10569 * 10570 * @param right The right of this view, in pixels. 10571 */ 10572 public final void setRight(int right) { 10573 if (right != mRight) { 10574 final boolean matrixIsIdentity = hasIdentityMatrix(); 10575 if (matrixIsIdentity) { 10576 if (mAttachInfo != null) { 10577 int maxRight; 10578 if (right < mRight) { 10579 maxRight = mRight; 10580 } else { 10581 maxRight = right; 10582 } 10583 invalidate(0, 0, maxRight - mLeft, mBottom - mTop); 10584 } 10585 } else { 10586 // Double-invalidation is necessary to capture view's old and new areas 10587 invalidate(true); 10588 } 10589 10590 int oldWidth = mRight - mLeft; 10591 int height = mBottom - mTop; 10592 10593 mRight = right; 10594 mRenderNode.setRight(mRight); 10595 10596 sizeChange(mRight - mLeft, height, oldWidth, height); 10597 10598 if (!matrixIsIdentity) { 10599 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10600 invalidate(true); 10601 } 10602 mBackgroundSizeChanged = true; 10603 invalidateParentIfNeeded(); 10604 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10605 // View was rejected last time it was drawn by its parent; this may have changed 10606 invalidateParentIfNeeded(); 10607 } 10608 } 10609 } 10610 10611 /** 10612 * The visual x position of this view, in pixels. This is equivalent to the 10613 * {@link #setTranslationX(float) translationX} property plus the current 10614 * {@link #getLeft() left} property. 10615 * 10616 * @return The visual x position of this view, in pixels. 10617 */ 10618 @ViewDebug.ExportedProperty(category = "drawing") 10619 public float getX() { 10620 return mLeft + getTranslationX(); 10621 } 10622 10623 /** 10624 * Sets the visual x position of this view, in pixels. This is equivalent to setting the 10625 * {@link #setTranslationX(float) translationX} property to be the difference between 10626 * the x value passed in and the current {@link #getLeft() left} property. 10627 * 10628 * @param x The visual x position of this view, in pixels. 10629 */ 10630 public void setX(float x) { 10631 setTranslationX(x - mLeft); 10632 } 10633 10634 /** 10635 * The visual y position of this view, in pixels. This is equivalent to the 10636 * {@link #setTranslationY(float) translationY} property plus the current 10637 * {@link #getTop() top} property. 10638 * 10639 * @return The visual y position of this view, in pixels. 10640 */ 10641 @ViewDebug.ExportedProperty(category = "drawing") 10642 public float getY() { 10643 return mTop + getTranslationY(); 10644 } 10645 10646 /** 10647 * Sets the visual y position of this view, in pixels. This is equivalent to setting the 10648 * {@link #setTranslationY(float) translationY} property to be the difference between 10649 * the y value passed in and the current {@link #getTop() top} property. 10650 * 10651 * @param y The visual y position of this view, in pixels. 10652 */ 10653 public void setY(float y) { 10654 setTranslationY(y - mTop); 10655 } 10656 10657 /** 10658 * The visual z position of this view, in pixels. This is equivalent to the 10659 * {@link #setTranslationZ(float) translationZ} property plus the current 10660 * {@link #getElevation() elevation} property. 10661 * 10662 * @return The visual z position of this view, in pixels. 10663 */ 10664 @ViewDebug.ExportedProperty(category = "drawing") 10665 public float getZ() { 10666 return getElevation() + getTranslationZ(); 10667 } 10668 10669 /** 10670 * Sets the visual z position of this view, in pixels. This is equivalent to setting the 10671 * {@link #setTranslationZ(float) translationZ} property to be the difference between 10672 * the x value passed in and the current {@link #getElevation() elevation} property. 10673 * 10674 * @param z The visual z position of this view, in pixels. 10675 */ 10676 public void setZ(float z) { 10677 setTranslationZ(z - getElevation()); 10678 } 10679 10680 /** 10681 * The base elevation of this view relative to its parent, in pixels. 10682 * 10683 * @return The base depth position of the view, in pixels. 10684 */ 10685 @ViewDebug.ExportedProperty(category = "drawing") 10686 public float getElevation() { 10687 return mRenderNode.getElevation(); 10688 } 10689 10690 /** 10691 * Sets the base elevation of this view, in pixels. 10692 * 10693 * @attr ref android.R.styleable#View_elevation 10694 */ 10695 public void setElevation(float elevation) { 10696 if (elevation != getElevation()) { 10697 invalidateViewProperty(true, false); 10698 mRenderNode.setElevation(elevation); 10699 invalidateViewProperty(false, true); 10700 10701 invalidateParentIfNeededAndWasQuickRejected(); 10702 } 10703 } 10704 10705 /** 10706 * The horizontal location of this view relative to its {@link #getLeft() left} position. 10707 * This position is post-layout, in addition to wherever the object's 10708 * layout placed it. 10709 * 10710 * @return The horizontal position of this view relative to its left position, in pixels. 10711 */ 10712 @ViewDebug.ExportedProperty(category = "drawing") 10713 public float getTranslationX() { 10714 return mRenderNode.getTranslationX(); 10715 } 10716 10717 /** 10718 * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. 10719 * This effectively positions the object post-layout, in addition to wherever the object's 10720 * layout placed it. 10721 * 10722 * @param translationX The horizontal position of this view relative to its left position, 10723 * in pixels. 10724 * 10725 * @attr ref android.R.styleable#View_translationX 10726 */ 10727 public void setTranslationX(float translationX) { 10728 if (translationX != getTranslationX()) { 10729 invalidateViewProperty(true, false); 10730 mRenderNode.setTranslationX(translationX); 10731 invalidateViewProperty(false, true); 10732 10733 invalidateParentIfNeededAndWasQuickRejected(); 10734 notifySubtreeAccessibilityStateChangedIfNeeded(); 10735 } 10736 } 10737 10738 /** 10739 * The vertical location of this view relative to its {@link #getTop() top} position. 10740 * This position is post-layout, in addition to wherever the object's 10741 * layout placed it. 10742 * 10743 * @return The vertical position of this view relative to its top position, 10744 * in pixels. 10745 */ 10746 @ViewDebug.ExportedProperty(category = "drawing") 10747 public float getTranslationY() { 10748 return mRenderNode.getTranslationY(); 10749 } 10750 10751 /** 10752 * Sets the vertical location of this view relative to its {@link #getTop() top} position. 10753 * This effectively positions the object post-layout, in addition to wherever the object's 10754 * layout placed it. 10755 * 10756 * @param translationY The vertical position of this view relative to its top position, 10757 * in pixels. 10758 * 10759 * @attr ref android.R.styleable#View_translationY 10760 */ 10761 public void setTranslationY(float translationY) { 10762 if (translationY != getTranslationY()) { 10763 invalidateViewProperty(true, false); 10764 mRenderNode.setTranslationY(translationY); 10765 invalidateViewProperty(false, true); 10766 10767 invalidateParentIfNeededAndWasQuickRejected(); 10768 } 10769 } 10770 10771 /** 10772 * The depth location of this view relative to its {@link #getElevation() elevation}. 10773 * 10774 * @return The depth of this view relative to its elevation. 10775 */ 10776 @ViewDebug.ExportedProperty(category = "drawing") 10777 public float getTranslationZ() { 10778 return mRenderNode.getTranslationZ(); 10779 } 10780 10781 /** 10782 * Sets the depth location of this view relative to its {@link #getElevation() elevation}. 10783 * 10784 * @attr ref android.R.styleable#View_translationZ 10785 */ 10786 public void setTranslationZ(float translationZ) { 10787 if (translationZ != getTranslationZ()) { 10788 invalidateViewProperty(true, false); 10789 mRenderNode.setTranslationZ(translationZ); 10790 invalidateViewProperty(false, true); 10791 10792 invalidateParentIfNeededAndWasQuickRejected(); 10793 } 10794 } 10795 10796 /** @hide */ 10797 public void setAnimationMatrix(Matrix matrix) { 10798 invalidateViewProperty(true, false); 10799 mRenderNode.setAnimationMatrix(matrix); 10800 invalidateViewProperty(false, true); 10801 10802 invalidateParentIfNeededAndWasQuickRejected(); 10803 } 10804 10805 /** 10806 * Returns the current StateListAnimator if exists. 10807 * 10808 * @return StateListAnimator or null if it does not exists 10809 * @see #setStateListAnimator(android.animation.StateListAnimator) 10810 */ 10811 public StateListAnimator getStateListAnimator() { 10812 return mStateListAnimator; 10813 } 10814 10815 /** 10816 * Attaches the provided StateListAnimator to this View. 10817 * <p> 10818 * Any previously attached StateListAnimator will be detached. 10819 * 10820 * @param stateListAnimator The StateListAnimator to update the view 10821 * @see {@link android.animation.StateListAnimator} 10822 */ 10823 public void setStateListAnimator(StateListAnimator stateListAnimator) { 10824 if (mStateListAnimator == stateListAnimator) { 10825 return; 10826 } 10827 if (mStateListAnimator != null) { 10828 mStateListAnimator.setTarget(null); 10829 } 10830 mStateListAnimator = stateListAnimator; 10831 if (stateListAnimator != null) { 10832 stateListAnimator.setTarget(this); 10833 if (isAttachedToWindow()) { 10834 stateListAnimator.setState(getDrawableState()); 10835 } 10836 } 10837 } 10838 10839 /** 10840 * Returns whether the Outline should be used to clip the contents of the View. 10841 * <p> 10842 * Note that this flag will only be respected if the View's Outline returns true from 10843 * {@link Outline#canClip()}. 10844 * 10845 * @see #setOutlineProvider(ViewOutlineProvider) 10846 * @see #setClipToOutline(boolean) 10847 */ 10848 public final boolean getClipToOutline() { 10849 return mRenderNode.getClipToOutline(); 10850 } 10851 10852 /** 10853 * Sets whether the View's Outline should be used to clip the contents of the View. 10854 * <p> 10855 * Note that this flag will only be respected if the View's Outline returns true from 10856 * {@link Outline#canClip()}. 10857 * 10858 * @see #setOutlineProvider(ViewOutlineProvider) 10859 * @see #getClipToOutline() 10860 */ 10861 public void setClipToOutline(boolean clipToOutline) { 10862 damageInParent(); 10863 if (getClipToOutline() != clipToOutline) { 10864 mRenderNode.setClipToOutline(clipToOutline); 10865 } 10866 } 10867 10868 // correspond to the enum values of View_outlineProvider 10869 private static final int PROVIDER_BACKGROUND = 0; 10870 private static final int PROVIDER_NONE = 1; 10871 private static final int PROVIDER_BOUNDS = 2; 10872 private static final int PROVIDER_PADDED_BOUNDS = 3; 10873 private void setOutlineProviderFromAttribute(int providerInt) { 10874 switch (providerInt) { 10875 case PROVIDER_BACKGROUND: 10876 setOutlineProvider(ViewOutlineProvider.BACKGROUND); 10877 break; 10878 case PROVIDER_NONE: 10879 setOutlineProvider(null); 10880 break; 10881 case PROVIDER_BOUNDS: 10882 setOutlineProvider(ViewOutlineProvider.BOUNDS); 10883 break; 10884 case PROVIDER_PADDED_BOUNDS: 10885 setOutlineProvider(ViewOutlineProvider.PADDED_BOUNDS); 10886 break; 10887 } 10888 } 10889 10890 /** 10891 * Sets the {@link ViewOutlineProvider} of the view, which generates the Outline that defines 10892 * the shape of the shadow it casts, and enables outline clipping. 10893 * <p> 10894 * The default ViewOutlineProvider, {@link ViewOutlineProvider#BACKGROUND}, queries the Outline 10895 * from the View's background drawable, via {@link Drawable#getOutline(Outline)}. Changing the 10896 * outline provider with this method allows this behavior to be overridden. 10897 * <p> 10898 * If the ViewOutlineProvider is null, if querying it for an outline returns false, 10899 * or if the produced Outline is {@link Outline#isEmpty()}, shadows will not be cast. 10900 * <p> 10901 * Only outlines that return true from {@link Outline#canClip()} may be used for clipping. 10902 * 10903 * @see #setClipToOutline(boolean) 10904 * @see #getClipToOutline() 10905 * @see #getOutlineProvider() 10906 */ 10907 public void setOutlineProvider(ViewOutlineProvider provider) { 10908 mOutlineProvider = provider; 10909 invalidateOutline(); 10910 } 10911 10912 /** 10913 * Returns the current {@link ViewOutlineProvider} of the view, which generates the Outline 10914 * that defines the shape of the shadow it casts, and enables outline clipping. 10915 * 10916 * @see #setOutlineProvider(ViewOutlineProvider) 10917 */ 10918 public ViewOutlineProvider getOutlineProvider() { 10919 return mOutlineProvider; 10920 } 10921 10922 /** 10923 * Called to rebuild this View's Outline from its {@link ViewOutlineProvider outline provider} 10924 * 10925 * @see #setOutlineProvider(ViewOutlineProvider) 10926 */ 10927 public void invalidateOutline() { 10928 // Unattached views ignore this signal, and outline is recomputed in onAttachedToWindow() 10929 if (mAttachInfo == null) return; 10930 10931 if (mOutlineProvider == null) { 10932 // no provider, remove outline 10933 mRenderNode.setOutline(null); 10934 } else { 10935 final Outline outline = mAttachInfo.mTmpOutline; 10936 outline.setEmpty(); 10937 outline.setAlpha(1.0f); 10938 10939 mOutlineProvider.getOutline(this, outline); 10940 mRenderNode.setOutline(outline); 10941 } 10942 10943 notifySubtreeAccessibilityStateChangedIfNeeded(); 10944 invalidateViewProperty(false, false); 10945 } 10946 10947 /** @hide */ 10948 public void setRevealClip(boolean shouldClip, float x, float y, float radius) { 10949 mRenderNode.setRevealClip(shouldClip, x, y, radius); 10950 invalidateViewProperty(false, false); 10951 } 10952 10953 /** 10954 * Hit rectangle in parent's coordinates 10955 * 10956 * @param outRect The hit rectangle of the view. 10957 */ 10958 public void getHitRect(Rect outRect) { 10959 if (hasIdentityMatrix() || mAttachInfo == null) { 10960 outRect.set(mLeft, mTop, mRight, mBottom); 10961 } else { 10962 final RectF tmpRect = mAttachInfo.mTmpTransformRect; 10963 tmpRect.set(0, 0, getWidth(), getHeight()); 10964 getMatrix().mapRect(tmpRect); // TODO: mRenderNode.mapRect(tmpRect) 10965 outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, 10966 (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); 10967 } 10968 } 10969 10970 /** 10971 * Determines whether the given point, in local coordinates is inside the view. 10972 */ 10973 /*package*/ final boolean pointInView(float localX, float localY) { 10974 return localX >= 0 && localX < (mRight - mLeft) 10975 && localY >= 0 && localY < (mBottom - mTop); 10976 } 10977 10978 /** 10979 * Utility method to determine whether the given point, in local coordinates, 10980 * is inside the view, where the area of the view is expanded by the slop factor. 10981 * This method is called while processing touch-move events to determine if the event 10982 * is still within the view. 10983 * 10984 * @hide 10985 */ 10986 public boolean pointInView(float localX, float localY, float slop) { 10987 return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && 10988 localY < ((mBottom - mTop) + slop); 10989 } 10990 10991 /** 10992 * When a view has focus and the user navigates away from it, the next view is searched for 10993 * starting from the rectangle filled in by this method. 10994 * 10995 * By default, the rectangle is the {@link #getDrawingRect(android.graphics.Rect)}) 10996 * of the view. However, if your view maintains some idea of internal selection, 10997 * such as a cursor, or a selected row or column, you should override this method and 10998 * fill in a more specific rectangle. 10999 * 11000 * @param r The rectangle to fill in, in this view's coordinates. 11001 */ 11002 public void getFocusedRect(Rect r) { 11003 getDrawingRect(r); 11004 } 11005 11006 /** 11007 * If some part of this view is not clipped by any of its parents, then 11008 * return that area in r in global (root) coordinates. To convert r to local 11009 * coordinates (without taking possible View rotations into account), offset 11010 * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). 11011 * If the view is completely clipped or translated out, return false. 11012 * 11013 * @param r If true is returned, r holds the global coordinates of the 11014 * visible portion of this view. 11015 * @param globalOffset If true is returned, globalOffset holds the dx,dy 11016 * between this view and its root. globalOffet may be null. 11017 * @return true if r is non-empty (i.e. part of the view is visible at the 11018 * root level. 11019 */ 11020 public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { 11021 int width = mRight - mLeft; 11022 int height = mBottom - mTop; 11023 if (width > 0 && height > 0) { 11024 r.set(0, 0, width, height); 11025 if (globalOffset != null) { 11026 globalOffset.set(-mScrollX, -mScrollY); 11027 } 11028 return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); 11029 } 11030 return false; 11031 } 11032 11033 public final boolean getGlobalVisibleRect(Rect r) { 11034 return getGlobalVisibleRect(r, null); 11035 } 11036 11037 public final boolean getLocalVisibleRect(Rect r) { 11038 final Point offset = mAttachInfo != null ? mAttachInfo.mPoint : new Point(); 11039 if (getGlobalVisibleRect(r, offset)) { 11040 r.offset(-offset.x, -offset.y); // make r local 11041 return true; 11042 } 11043 return false; 11044 } 11045 11046 /** 11047 * Offset this view's vertical location by the specified number of pixels. 11048 * 11049 * @param offset the number of pixels to offset the view by 11050 */ 11051 public void offsetTopAndBottom(int offset) { 11052 if (offset != 0) { 11053 final boolean matrixIsIdentity = hasIdentityMatrix(); 11054 if (matrixIsIdentity) { 11055 if (isHardwareAccelerated()) { 11056 invalidateViewProperty(false, false); 11057 } else { 11058 final ViewParent p = mParent; 11059 if (p != null && mAttachInfo != null) { 11060 final Rect r = mAttachInfo.mTmpInvalRect; 11061 int minTop; 11062 int maxBottom; 11063 int yLoc; 11064 if (offset < 0) { 11065 minTop = mTop + offset; 11066 maxBottom = mBottom; 11067 yLoc = offset; 11068 } else { 11069 minTop = mTop; 11070 maxBottom = mBottom + offset; 11071 yLoc = 0; 11072 } 11073 r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); 11074 p.invalidateChild(this, r); 11075 } 11076 } 11077 } else { 11078 invalidateViewProperty(false, false); 11079 } 11080 11081 mTop += offset; 11082 mBottom += offset; 11083 mRenderNode.offsetTopAndBottom(offset); 11084 if (isHardwareAccelerated()) { 11085 invalidateViewProperty(false, false); 11086 } else { 11087 if (!matrixIsIdentity) { 11088 invalidateViewProperty(false, true); 11089 } 11090 invalidateParentIfNeeded(); 11091 } 11092 notifySubtreeAccessibilityStateChangedIfNeeded(); 11093 } 11094 } 11095 11096 /** 11097 * Offset this view's horizontal location by the specified amount of pixels. 11098 * 11099 * @param offset the number of pixels to offset the view by 11100 */ 11101 public void offsetLeftAndRight(int offset) { 11102 if (offset != 0) { 11103 final boolean matrixIsIdentity = hasIdentityMatrix(); 11104 if (matrixIsIdentity) { 11105 if (isHardwareAccelerated()) { 11106 invalidateViewProperty(false, false); 11107 } else { 11108 final ViewParent p = mParent; 11109 if (p != null && mAttachInfo != null) { 11110 final Rect r = mAttachInfo.mTmpInvalRect; 11111 int minLeft; 11112 int maxRight; 11113 if (offset < 0) { 11114 minLeft = mLeft + offset; 11115 maxRight = mRight; 11116 } else { 11117 minLeft = mLeft; 11118 maxRight = mRight + offset; 11119 } 11120 r.set(0, 0, maxRight - minLeft, mBottom - mTop); 11121 p.invalidateChild(this, r); 11122 } 11123 } 11124 } else { 11125 invalidateViewProperty(false, false); 11126 } 11127 11128 mLeft += offset; 11129 mRight += offset; 11130 mRenderNode.offsetLeftAndRight(offset); 11131 if (isHardwareAccelerated()) { 11132 invalidateViewProperty(false, false); 11133 } else { 11134 if (!matrixIsIdentity) { 11135 invalidateViewProperty(false, true); 11136 } 11137 invalidateParentIfNeeded(); 11138 } 11139 notifySubtreeAccessibilityStateChangedIfNeeded(); 11140 } 11141 } 11142 11143 /** 11144 * Get the LayoutParams associated with this view. All views should have 11145 * layout parameters. These supply parameters to the <i>parent</i> of this 11146 * view specifying how it should be arranged. There are many subclasses of 11147 * ViewGroup.LayoutParams, and these correspond to the different subclasses 11148 * of ViewGroup that are responsible for arranging their children. 11149 * 11150 * This method may return null if this View is not attached to a parent 11151 * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} 11152 * was not invoked successfully. When a View is attached to a parent 11153 * ViewGroup, this method must not return null. 11154 * 11155 * @return The LayoutParams associated with this view, or null if no 11156 * parameters have been set yet 11157 */ 11158 @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") 11159 public ViewGroup.LayoutParams getLayoutParams() { 11160 return mLayoutParams; 11161 } 11162 11163 /** 11164 * Set the layout parameters associated with this view. These supply 11165 * parameters to the <i>parent</i> of this view specifying how it should be 11166 * arranged. There are many subclasses of ViewGroup.LayoutParams, and these 11167 * correspond to the different subclasses of ViewGroup that are responsible 11168 * for arranging their children. 11169 * 11170 * @param params The layout parameters for this view, cannot be null 11171 */ 11172 public void setLayoutParams(ViewGroup.LayoutParams params) { 11173 if (params == null) { 11174 throw new NullPointerException("Layout parameters cannot be null"); 11175 } 11176 mLayoutParams = params; 11177 resolveLayoutParams(); 11178 if (mParent instanceof ViewGroup) { 11179 ((ViewGroup) mParent).onSetLayoutParams(this, params); 11180 } 11181 requestLayout(); 11182 } 11183 11184 /** 11185 * Resolve the layout parameters depending on the resolved layout direction 11186 * 11187 * @hide 11188 */ 11189 public void resolveLayoutParams() { 11190 if (mLayoutParams != null) { 11191 mLayoutParams.resolveLayoutDirection(getLayoutDirection()); 11192 } 11193 } 11194 11195 /** 11196 * Set the scrolled position of your view. This will cause a call to 11197 * {@link #onScrollChanged(int, int, int, int)} and the view will be 11198 * invalidated. 11199 * @param x the x position to scroll to 11200 * @param y the y position to scroll to 11201 */ 11202 public void scrollTo(int x, int y) { 11203 if (mScrollX != x || mScrollY != y) { 11204 int oldX = mScrollX; 11205 int oldY = mScrollY; 11206 mScrollX = x; 11207 mScrollY = y; 11208 invalidateParentCaches(); 11209 onScrollChanged(mScrollX, mScrollY, oldX, oldY); 11210 if (!awakenScrollBars()) { 11211 postInvalidateOnAnimation(); 11212 } 11213 } 11214 } 11215 11216 /** 11217 * Move the scrolled position of your view. This will cause a call to 11218 * {@link #onScrollChanged(int, int, int, int)} and the view will be 11219 * invalidated. 11220 * @param x the amount of pixels to scroll by horizontally 11221 * @param y the amount of pixels to scroll by vertically 11222 */ 11223 public void scrollBy(int x, int y) { 11224 scrollTo(mScrollX + x, mScrollY + y); 11225 } 11226 11227 /** 11228 * <p>Trigger the scrollbars to draw. When invoked this method starts an 11229 * animation to fade the scrollbars out after a default delay. If a subclass 11230 * provides animated scrolling, the start delay should equal the duration 11231 * of the scrolling animation.</p> 11232 * 11233 * <p>The animation starts only if at least one of the scrollbars is 11234 * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and 11235 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 11236 * this method returns true, and false otherwise. If the animation is 11237 * started, this method calls {@link #invalidate()}; in that case the 11238 * caller should not call {@link #invalidate()}.</p> 11239 * 11240 * <p>This method should be invoked every time a subclass directly updates 11241 * the scroll parameters.</p> 11242 * 11243 * <p>This method is automatically invoked by {@link #scrollBy(int, int)} 11244 * and {@link #scrollTo(int, int)}.</p> 11245 * 11246 * @return true if the animation is played, false otherwise 11247 * 11248 * @see #awakenScrollBars(int) 11249 * @see #scrollBy(int, int) 11250 * @see #scrollTo(int, int) 11251 * @see #isHorizontalScrollBarEnabled() 11252 * @see #isVerticalScrollBarEnabled() 11253 * @see #setHorizontalScrollBarEnabled(boolean) 11254 * @see #setVerticalScrollBarEnabled(boolean) 11255 */ 11256 protected boolean awakenScrollBars() { 11257 return mScrollCache != null && 11258 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); 11259 } 11260 11261 /** 11262 * Trigger the scrollbars to draw. 11263 * This method differs from awakenScrollBars() only in its default duration. 11264 * initialAwakenScrollBars() will show the scroll bars for longer than 11265 * usual to give the user more of a chance to notice them. 11266 * 11267 * @return true if the animation is played, false otherwise. 11268 */ 11269 private boolean initialAwakenScrollBars() { 11270 return mScrollCache != null && 11271 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); 11272 } 11273 11274 /** 11275 * <p> 11276 * Trigger the scrollbars to draw. When invoked this method starts an 11277 * animation to fade the scrollbars out after a fixed delay. If a subclass 11278 * provides animated scrolling, the start delay should equal the duration of 11279 * the scrolling animation. 11280 * </p> 11281 * 11282 * <p> 11283 * The animation starts only if at least one of the scrollbars is enabled, 11284 * as specified by {@link #isHorizontalScrollBarEnabled()} and 11285 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 11286 * this method returns true, and false otherwise. If the animation is 11287 * started, this method calls {@link #invalidate()}; in that case the caller 11288 * should not call {@link #invalidate()}. 11289 * </p> 11290 * 11291 * <p> 11292 * This method should be invoked everytime a subclass directly updates the 11293 * scroll parameters. 11294 * </p> 11295 * 11296 * @param startDelay the delay, in milliseconds, after which the animation 11297 * should start; when the delay is 0, the animation starts 11298 * immediately 11299 * @return true if the animation is played, false otherwise 11300 * 11301 * @see #scrollBy(int, int) 11302 * @see #scrollTo(int, int) 11303 * @see #isHorizontalScrollBarEnabled() 11304 * @see #isVerticalScrollBarEnabled() 11305 * @see #setHorizontalScrollBarEnabled(boolean) 11306 * @see #setVerticalScrollBarEnabled(boolean) 11307 */ 11308 protected boolean awakenScrollBars(int startDelay) { 11309 return awakenScrollBars(startDelay, true); 11310 } 11311 11312 /** 11313 * <p> 11314 * Trigger the scrollbars to draw. When invoked this method starts an 11315 * animation to fade the scrollbars out after a fixed delay. If a subclass 11316 * provides animated scrolling, the start delay should equal the duration of 11317 * the scrolling animation. 11318 * </p> 11319 * 11320 * <p> 11321 * The animation starts only if at least one of the scrollbars is enabled, 11322 * as specified by {@link #isHorizontalScrollBarEnabled()} and 11323 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 11324 * this method returns true, and false otherwise. If the animation is 11325 * started, this method calls {@link #invalidate()} if the invalidate parameter 11326 * is set to true; in that case the caller 11327 * should not call {@link #invalidate()}. 11328 * </p> 11329 * 11330 * <p> 11331 * This method should be invoked everytime a subclass directly updates the 11332 * scroll parameters. 11333 * </p> 11334 * 11335 * @param startDelay the delay, in milliseconds, after which the animation 11336 * should start; when the delay is 0, the animation starts 11337 * immediately 11338 * 11339 * @param invalidate Wheter this method should call invalidate 11340 * 11341 * @return true if the animation is played, false otherwise 11342 * 11343 * @see #scrollBy(int, int) 11344 * @see #scrollTo(int, int) 11345 * @see #isHorizontalScrollBarEnabled() 11346 * @see #isVerticalScrollBarEnabled() 11347 * @see #setHorizontalScrollBarEnabled(boolean) 11348 * @see #setVerticalScrollBarEnabled(boolean) 11349 */ 11350 protected boolean awakenScrollBars(int startDelay, boolean invalidate) { 11351 final ScrollabilityCache scrollCache = mScrollCache; 11352 11353 if (scrollCache == null || !scrollCache.fadeScrollBars) { 11354 return false; 11355 } 11356 11357 if (scrollCache.scrollBar == null) { 11358 scrollCache.scrollBar = new ScrollBarDrawable(); 11359 } 11360 11361 if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { 11362 11363 if (invalidate) { 11364 // Invalidate to show the scrollbars 11365 postInvalidateOnAnimation(); 11366 } 11367 11368 if (scrollCache.state == ScrollabilityCache.OFF) { 11369 // FIXME: this is copied from WindowManagerService. 11370 // We should get this value from the system when it 11371 // is possible to do so. 11372 final int KEY_REPEAT_FIRST_DELAY = 750; 11373 startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); 11374 } 11375 11376 // Tell mScrollCache when we should start fading. This may 11377 // extend the fade start time if one was already scheduled 11378 long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; 11379 scrollCache.fadeStartTime = fadeStartTime; 11380 scrollCache.state = ScrollabilityCache.ON; 11381 11382 // Schedule our fader to run, unscheduling any old ones first 11383 if (mAttachInfo != null) { 11384 mAttachInfo.mHandler.removeCallbacks(scrollCache); 11385 mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); 11386 } 11387 11388 return true; 11389 } 11390 11391 return false; 11392 } 11393 11394 /** 11395 * Do not invalidate views which are not visible and which are not running an animation. They 11396 * will not get drawn and they should not set dirty flags as if they will be drawn 11397 */ 11398 private boolean skipInvalidate() { 11399 return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && 11400 (!(mParent instanceof ViewGroup) || 11401 !((ViewGroup) mParent).isViewTransitioning(this)); 11402 } 11403 11404 /** 11405 * Mark the area defined by dirty as needing to be drawn. If the view is 11406 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some 11407 * point in the future. 11408 * <p> 11409 * This must be called from a UI thread. To call from a non-UI thread, call 11410 * {@link #postInvalidate()}. 11411 * <p> 11412 * <b>WARNING:</b> In API 19 and below, this method may be destructive to 11413 * {@code dirty}. 11414 * 11415 * @param dirty the rectangle representing the bounds of the dirty region 11416 */ 11417 public void invalidate(Rect dirty) { 11418 final int scrollX = mScrollX; 11419 final int scrollY = mScrollY; 11420 invalidateInternal(dirty.left - scrollX, dirty.top - scrollY, 11421 dirty.right - scrollX, dirty.bottom - scrollY, true, false); 11422 } 11423 11424 /** 11425 * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. The 11426 * coordinates of the dirty rect are relative to the view. If the view is 11427 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some 11428 * point in the future. 11429 * <p> 11430 * This must be called from a UI thread. To call from a non-UI thread, call 11431 * {@link #postInvalidate()}. 11432 * 11433 * @param l the left position of the dirty region 11434 * @param t the top position of the dirty region 11435 * @param r the right position of the dirty region 11436 * @param b the bottom position of the dirty region 11437 */ 11438 public void invalidate(int l, int t, int r, int b) { 11439 final int scrollX = mScrollX; 11440 final int scrollY = mScrollY; 11441 invalidateInternal(l - scrollX, t - scrollY, r - scrollX, b - scrollY, true, false); 11442 } 11443 11444 /** 11445 * Invalidate the whole view. If the view is visible, 11446 * {@link #onDraw(android.graphics.Canvas)} will be called at some point in 11447 * the future. 11448 * <p> 11449 * This must be called from a UI thread. To call from a non-UI thread, call 11450 * {@link #postInvalidate()}. 11451 */ 11452 public void invalidate() { 11453 invalidate(true); 11454 } 11455 11456 /** 11457 * This is where the invalidate() work actually happens. A full invalidate() 11458 * causes the drawing cache to be invalidated, but this function can be 11459 * called with invalidateCache set to false to skip that invalidation step 11460 * for cases that do not need it (for example, a component that remains at 11461 * the same dimensions with the same content). 11462 * 11463 * @param invalidateCache Whether the drawing cache for this view should be 11464 * invalidated as well. This is usually true for a full 11465 * invalidate, but may be set to false if the View's contents or 11466 * dimensions have not changed. 11467 */ 11468 void invalidate(boolean invalidateCache) { 11469 invalidateInternal(0, 0, mRight - mLeft, mBottom - mTop, invalidateCache, true); 11470 } 11471 11472 void invalidateInternal(int l, int t, int r, int b, boolean invalidateCache, 11473 boolean fullInvalidate) { 11474 if (mGhostView != null) { 11475 mGhostView.invalidate(invalidateCache); 11476 return; 11477 } 11478 11479 if (skipInvalidate()) { 11480 return; 11481 } 11482 11483 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) 11484 || (invalidateCache && (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID) 11485 || (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED 11486 || (fullInvalidate && isOpaque() != mLastIsOpaque)) { 11487 if (fullInvalidate) { 11488 mLastIsOpaque = isOpaque(); 11489 mPrivateFlags &= ~PFLAG_DRAWN; 11490 } 11491 11492 mPrivateFlags |= PFLAG_DIRTY; 11493 11494 if (invalidateCache) { 11495 mPrivateFlags |= PFLAG_INVALIDATED; 11496 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 11497 } 11498 11499 // Propagate the damage rectangle to the parent view. 11500 final AttachInfo ai = mAttachInfo; 11501 final ViewParent p = mParent; 11502 if (p != null && ai != null && l < r && t < b) { 11503 final Rect damage = ai.mTmpInvalRect; 11504 damage.set(l, t, r, b); 11505 p.invalidateChild(this, damage); 11506 } 11507 11508 // Damage the entire projection receiver, if necessary. 11509 if (mBackground != null && mBackground.isProjected()) { 11510 final View receiver = getProjectionReceiver(); 11511 if (receiver != null) { 11512 receiver.damageInParent(); 11513 } 11514 } 11515 11516 // Damage the entire IsolatedZVolume receiving this view's shadow. 11517 if (isHardwareAccelerated() && getZ() != 0) { 11518 damageShadowReceiver(); 11519 } 11520 } 11521 } 11522 11523 /** 11524 * @return this view's projection receiver, or {@code null} if none exists 11525 */ 11526 private View getProjectionReceiver() { 11527 ViewParent p = getParent(); 11528 while (p != null && p instanceof View) { 11529 final View v = (View) p; 11530 if (v.isProjectionReceiver()) { 11531 return v; 11532 } 11533 p = p.getParent(); 11534 } 11535 11536 return null; 11537 } 11538 11539 /** 11540 * @return whether the view is a projection receiver 11541 */ 11542 private boolean isProjectionReceiver() { 11543 return mBackground != null; 11544 } 11545 11546 /** 11547 * Damage area of the screen that can be covered by this View's shadow. 11548 * 11549 * This method will guarantee that any changes to shadows cast by a View 11550 * are damaged on the screen for future redraw. 11551 */ 11552 private void damageShadowReceiver() { 11553 final AttachInfo ai = mAttachInfo; 11554 if (ai != null) { 11555 ViewParent p = getParent(); 11556 if (p != null && p instanceof ViewGroup) { 11557 final ViewGroup vg = (ViewGroup) p; 11558 vg.damageInParent(); 11559 } 11560 } 11561 } 11562 11563 /** 11564 * Quick invalidation for View property changes (alpha, translationXY, etc.). We don't want to 11565 * set any flags or handle all of the cases handled by the default invalidation methods. 11566 * Instead, we just want to schedule a traversal in ViewRootImpl with the appropriate 11567 * dirty rect. This method calls into fast invalidation methods in ViewGroup that 11568 * walk up the hierarchy, transforming the dirty rect as necessary. 11569 * 11570 * The method also handles normal invalidation logic if display list properties are not 11571 * being used in this view. The invalidateParent and forceRedraw flags are used by that 11572 * backup approach, to handle these cases used in the various property-setting methods. 11573 * 11574 * @param invalidateParent Force a call to invalidateParentCaches() if display list properties 11575 * are not being used in this view 11576 * @param forceRedraw Mark the view as DRAWN to force the invalidation to propagate, if display 11577 * list properties are not being used in this view 11578 */ 11579 void invalidateViewProperty(boolean invalidateParent, boolean forceRedraw) { 11580 if (!isHardwareAccelerated() 11581 || !mRenderNode.isValid() 11582 || (mPrivateFlags & PFLAG_DRAW_ANIMATION) != 0) { 11583 if (invalidateParent) { 11584 invalidateParentCaches(); 11585 } 11586 if (forceRedraw) { 11587 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11588 } 11589 invalidate(false); 11590 } else { 11591 damageInParent(); 11592 } 11593 if (isHardwareAccelerated() && invalidateParent && getZ() != 0) { 11594 damageShadowReceiver(); 11595 } 11596 } 11597 11598 /** 11599 * Tells the parent view to damage this view's bounds. 11600 * 11601 * @hide 11602 */ 11603 protected void damageInParent() { 11604 final AttachInfo ai = mAttachInfo; 11605 final ViewParent p = mParent; 11606 if (p != null && ai != null) { 11607 final Rect r = ai.mTmpInvalRect; 11608 r.set(0, 0, mRight - mLeft, mBottom - mTop); 11609 if (mParent instanceof ViewGroup) { 11610 ((ViewGroup) mParent).damageChild(this, r); 11611 } else { 11612 mParent.invalidateChild(this, r); 11613 } 11614 } 11615 } 11616 11617 /** 11618 * Utility method to transform a given Rect by the current matrix of this view. 11619 */ 11620 void transformRect(final Rect rect) { 11621 if (!getMatrix().isIdentity()) { 11622 RectF boundingRect = mAttachInfo.mTmpTransformRect; 11623 boundingRect.set(rect); 11624 getMatrix().mapRect(boundingRect); 11625 rect.set((int) Math.floor(boundingRect.left), 11626 (int) Math.floor(boundingRect.top), 11627 (int) Math.ceil(boundingRect.right), 11628 (int) Math.ceil(boundingRect.bottom)); 11629 } 11630 } 11631 11632 /** 11633 * Used to indicate that the parent of this view should clear its caches. This functionality 11634 * is used to force the parent to rebuild its display list (when hardware-accelerated), 11635 * which is necessary when various parent-managed properties of the view change, such as 11636 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only 11637 * clears the parent caches and does not causes an invalidate event. 11638 * 11639 * @hide 11640 */ 11641 protected void invalidateParentCaches() { 11642 if (mParent instanceof View) { 11643 ((View) mParent).mPrivateFlags |= PFLAG_INVALIDATED; 11644 } 11645 } 11646 11647 /** 11648 * Used to indicate that the parent of this view should be invalidated. This functionality 11649 * is used to force the parent to rebuild its display list (when hardware-accelerated), 11650 * which is necessary when various parent-managed properties of the view change, such as 11651 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate 11652 * an invalidation event to the parent. 11653 * 11654 * @hide 11655 */ 11656 protected void invalidateParentIfNeeded() { 11657 if (isHardwareAccelerated() && mParent instanceof View) { 11658 ((View) mParent).invalidate(true); 11659 } 11660 } 11661 11662 /** 11663 * @hide 11664 */ 11665 protected void invalidateParentIfNeededAndWasQuickRejected() { 11666 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) != 0) { 11667 // View was rejected last time it was drawn by its parent; this may have changed 11668 invalidateParentIfNeeded(); 11669 } 11670 } 11671 11672 /** 11673 * Indicates whether this View is opaque. An opaque View guarantees that it will 11674 * draw all the pixels overlapping its bounds using a fully opaque color. 11675 * 11676 * Subclasses of View should override this method whenever possible to indicate 11677 * whether an instance is opaque. Opaque Views are treated in a special way by 11678 * the View hierarchy, possibly allowing it to perform optimizations during 11679 * invalidate/draw passes. 11680 * 11681 * @return True if this View is guaranteed to be fully opaque, false otherwise. 11682 */ 11683 @ViewDebug.ExportedProperty(category = "drawing") 11684 public boolean isOpaque() { 11685 return (mPrivateFlags & PFLAG_OPAQUE_MASK) == PFLAG_OPAQUE_MASK && 11686 getFinalAlpha() >= 1.0f; 11687 } 11688 11689 /** 11690 * @hide 11691 */ 11692 protected void computeOpaqueFlags() { 11693 // Opaque if: 11694 // - Has a background 11695 // - Background is opaque 11696 // - Doesn't have scrollbars or scrollbars overlay 11697 11698 if (mBackground != null && mBackground.getOpacity() == PixelFormat.OPAQUE) { 11699 mPrivateFlags |= PFLAG_OPAQUE_BACKGROUND; 11700 } else { 11701 mPrivateFlags &= ~PFLAG_OPAQUE_BACKGROUND; 11702 } 11703 11704 final int flags = mViewFlags; 11705 if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || 11706 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY || 11707 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_OUTSIDE_OVERLAY) { 11708 mPrivateFlags |= PFLAG_OPAQUE_SCROLLBARS; 11709 } else { 11710 mPrivateFlags &= ~PFLAG_OPAQUE_SCROLLBARS; 11711 } 11712 } 11713 11714 /** 11715 * @hide 11716 */ 11717 protected boolean hasOpaqueScrollbars() { 11718 return (mPrivateFlags & PFLAG_OPAQUE_SCROLLBARS) == PFLAG_OPAQUE_SCROLLBARS; 11719 } 11720 11721 /** 11722 * @return A handler associated with the thread running the View. This 11723 * handler can be used to pump events in the UI events queue. 11724 */ 11725 public Handler getHandler() { 11726 final AttachInfo attachInfo = mAttachInfo; 11727 if (attachInfo != null) { 11728 return attachInfo.mHandler; 11729 } 11730 return null; 11731 } 11732 11733 /** 11734 * Gets the view root associated with the View. 11735 * @return The view root, or null if none. 11736 * @hide 11737 */ 11738 public ViewRootImpl getViewRootImpl() { 11739 if (mAttachInfo != null) { 11740 return mAttachInfo.mViewRootImpl; 11741 } 11742 return null; 11743 } 11744 11745 /** 11746 * @hide 11747 */ 11748 public HardwareRenderer getHardwareRenderer() { 11749 return mAttachInfo != null ? mAttachInfo.mHardwareRenderer : null; 11750 } 11751 11752 /** 11753 * <p>Causes the Runnable to be added to the message queue. 11754 * The runnable will be run on the user interface thread.</p> 11755 * 11756 * @param action The Runnable that will be executed. 11757 * 11758 * @return Returns true if the Runnable was successfully placed in to the 11759 * message queue. Returns false on failure, usually because the 11760 * looper processing the message queue is exiting. 11761 * 11762 * @see #postDelayed 11763 * @see #removeCallbacks 11764 */ 11765 public boolean post(Runnable action) { 11766 final AttachInfo attachInfo = mAttachInfo; 11767 if (attachInfo != null) { 11768 return attachInfo.mHandler.post(action); 11769 } 11770 // Assume that post will succeed later 11771 ViewRootImpl.getRunQueue().post(action); 11772 return true; 11773 } 11774 11775 /** 11776 * <p>Causes the Runnable to be added to the message queue, to be run 11777 * after the specified amount of time elapses. 11778 * The runnable will be run on the user interface thread.</p> 11779 * 11780 * @param action The Runnable that will be executed. 11781 * @param delayMillis The delay (in milliseconds) until the Runnable 11782 * will be executed. 11783 * 11784 * @return true if the Runnable was successfully placed in to the 11785 * message queue. Returns false on failure, usually because the 11786 * looper processing the message queue is exiting. Note that a 11787 * result of true does not mean the Runnable will be processed -- 11788 * if the looper is quit before the delivery time of the message 11789 * occurs then the message will be dropped. 11790 * 11791 * @see #post 11792 * @see #removeCallbacks 11793 */ 11794 public boolean postDelayed(Runnable action, long delayMillis) { 11795 final AttachInfo attachInfo = mAttachInfo; 11796 if (attachInfo != null) { 11797 return attachInfo.mHandler.postDelayed(action, delayMillis); 11798 } 11799 // Assume that post will succeed later 11800 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 11801 return true; 11802 } 11803 11804 /** 11805 * <p>Causes the Runnable to execute on the next animation time step. 11806 * The runnable will be run on the user interface thread.</p> 11807 * 11808 * @param action The Runnable that will be executed. 11809 * 11810 * @see #postOnAnimationDelayed 11811 * @see #removeCallbacks 11812 */ 11813 public void postOnAnimation(Runnable action) { 11814 final AttachInfo attachInfo = mAttachInfo; 11815 if (attachInfo != null) { 11816 attachInfo.mViewRootImpl.mChoreographer.postCallback( 11817 Choreographer.CALLBACK_ANIMATION, action, null); 11818 } else { 11819 // Assume that post will succeed later 11820 ViewRootImpl.getRunQueue().post(action); 11821 } 11822 } 11823 11824 /** 11825 * <p>Causes the Runnable to execute on the next animation time step, 11826 * after the specified amount of time elapses. 11827 * The runnable will be run on the user interface thread.</p> 11828 * 11829 * @param action The Runnable that will be executed. 11830 * @param delayMillis The delay (in milliseconds) until the Runnable 11831 * will be executed. 11832 * 11833 * @see #postOnAnimation 11834 * @see #removeCallbacks 11835 */ 11836 public void postOnAnimationDelayed(Runnable action, long delayMillis) { 11837 final AttachInfo attachInfo = mAttachInfo; 11838 if (attachInfo != null) { 11839 attachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 11840 Choreographer.CALLBACK_ANIMATION, action, null, delayMillis); 11841 } else { 11842 // Assume that post will succeed later 11843 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 11844 } 11845 } 11846 11847 /** 11848 * <p>Removes the specified Runnable from the message queue.</p> 11849 * 11850 * @param action The Runnable to remove from the message handling queue 11851 * 11852 * @return true if this view could ask the Handler to remove the Runnable, 11853 * false otherwise. When the returned value is true, the Runnable 11854 * may or may not have been actually removed from the message queue 11855 * (for instance, if the Runnable was not in the queue already.) 11856 * 11857 * @see #post 11858 * @see #postDelayed 11859 * @see #postOnAnimation 11860 * @see #postOnAnimationDelayed 11861 */ 11862 public boolean removeCallbacks(Runnable action) { 11863 if (action != null) { 11864 final AttachInfo attachInfo = mAttachInfo; 11865 if (attachInfo != null) { 11866 attachInfo.mHandler.removeCallbacks(action); 11867 attachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 11868 Choreographer.CALLBACK_ANIMATION, action, null); 11869 } 11870 // Assume that post will succeed later 11871 ViewRootImpl.getRunQueue().removeCallbacks(action); 11872 } 11873 return true; 11874 } 11875 11876 /** 11877 * <p>Cause an invalidate to happen on a subsequent cycle through the event loop. 11878 * Use this to invalidate the View from a non-UI thread.</p> 11879 * 11880 * <p>This method can be invoked from outside of the UI thread 11881 * only when this View is attached to a window.</p> 11882 * 11883 * @see #invalidate() 11884 * @see #postInvalidateDelayed(long) 11885 */ 11886 public void postInvalidate() { 11887 postInvalidateDelayed(0); 11888 } 11889 11890 /** 11891 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 11892 * through the event loop. Use this to invalidate the View from a non-UI thread.</p> 11893 * 11894 * <p>This method can be invoked from outside of the UI thread 11895 * only when this View is attached to a window.</p> 11896 * 11897 * @param left The left coordinate of the rectangle to invalidate. 11898 * @param top The top coordinate of the rectangle to invalidate. 11899 * @param right The right coordinate of the rectangle to invalidate. 11900 * @param bottom The bottom coordinate of the rectangle to invalidate. 11901 * 11902 * @see #invalidate(int, int, int, int) 11903 * @see #invalidate(Rect) 11904 * @see #postInvalidateDelayed(long, int, int, int, int) 11905 */ 11906 public void postInvalidate(int left, int top, int right, int bottom) { 11907 postInvalidateDelayed(0, left, top, right, bottom); 11908 } 11909 11910 /** 11911 * <p>Cause an invalidate to happen on a subsequent cycle through the event 11912 * loop. Waits for the specified amount of time.</p> 11913 * 11914 * <p>This method can be invoked from outside of the UI thread 11915 * only when this View is attached to a window.</p> 11916 * 11917 * @param delayMilliseconds the duration in milliseconds to delay the 11918 * invalidation by 11919 * 11920 * @see #invalidate() 11921 * @see #postInvalidate() 11922 */ 11923 public void postInvalidateDelayed(long delayMilliseconds) { 11924 // We try only with the AttachInfo because there's no point in invalidating 11925 // if we are not attached to our window 11926 final AttachInfo attachInfo = mAttachInfo; 11927 if (attachInfo != null) { 11928 attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); 11929 } 11930 } 11931 11932 /** 11933 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 11934 * through the event loop. Waits for the specified amount of time.</p> 11935 * 11936 * <p>This method can be invoked from outside of the UI thread 11937 * only when this View is attached to a window.</p> 11938 * 11939 * @param delayMilliseconds the duration in milliseconds to delay the 11940 * invalidation by 11941 * @param left The left coordinate of the rectangle to invalidate. 11942 * @param top The top coordinate of the rectangle to invalidate. 11943 * @param right The right coordinate of the rectangle to invalidate. 11944 * @param bottom The bottom coordinate of the rectangle to invalidate. 11945 * 11946 * @see #invalidate(int, int, int, int) 11947 * @see #invalidate(Rect) 11948 * @see #postInvalidate(int, int, int, int) 11949 */ 11950 public void postInvalidateDelayed(long delayMilliseconds, int left, int top, 11951 int right, int bottom) { 11952 11953 // We try only with the AttachInfo because there's no point in invalidating 11954 // if we are not attached to our window 11955 final AttachInfo attachInfo = mAttachInfo; 11956 if (attachInfo != null) { 11957 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 11958 info.target = this; 11959 info.left = left; 11960 info.top = top; 11961 info.right = right; 11962 info.bottom = bottom; 11963 11964 attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); 11965 } 11966 } 11967 11968 /** 11969 * <p>Cause an invalidate to happen on the next animation time step, typically the 11970 * next display frame.</p> 11971 * 11972 * <p>This method can be invoked from outside of the UI thread 11973 * only when this View is attached to a window.</p> 11974 * 11975 * @see #invalidate() 11976 */ 11977 public void postInvalidateOnAnimation() { 11978 // We try only with the AttachInfo because there's no point in invalidating 11979 // if we are not attached to our window 11980 final AttachInfo attachInfo = mAttachInfo; 11981 if (attachInfo != null) { 11982 attachInfo.mViewRootImpl.dispatchInvalidateOnAnimation(this); 11983 } 11984 } 11985 11986 /** 11987 * <p>Cause an invalidate of the specified area to happen on the next animation 11988 * time step, typically the next display frame.</p> 11989 * 11990 * <p>This method can be invoked from outside of the UI thread 11991 * only when this View is attached to a window.</p> 11992 * 11993 * @param left The left coordinate of the rectangle to invalidate. 11994 * @param top The top coordinate of the rectangle to invalidate. 11995 * @param right The right coordinate of the rectangle to invalidate. 11996 * @param bottom The bottom coordinate of the rectangle to invalidate. 11997 * 11998 * @see #invalidate(int, int, int, int) 11999 * @see #invalidate(Rect) 12000 */ 12001 public void postInvalidateOnAnimation(int left, int top, int right, int bottom) { 12002 // We try only with the AttachInfo because there's no point in invalidating 12003 // if we are not attached to our window 12004 final AttachInfo attachInfo = mAttachInfo; 12005 if (attachInfo != null) { 12006 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 12007 info.target = this; 12008 info.left = left; 12009 info.top = top; 12010 info.right = right; 12011 info.bottom = bottom; 12012 12013 attachInfo.mViewRootImpl.dispatchInvalidateRectOnAnimation(info); 12014 } 12015 } 12016 12017 /** 12018 * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. 12019 * This event is sent at most once every 12020 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. 12021 */ 12022 private void postSendViewScrolledAccessibilityEventCallback() { 12023 if (mSendViewScrolledAccessibilityEvent == null) { 12024 mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); 12025 } 12026 if (!mSendViewScrolledAccessibilityEvent.mIsPending) { 12027 mSendViewScrolledAccessibilityEvent.mIsPending = true; 12028 postDelayed(mSendViewScrolledAccessibilityEvent, 12029 ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); 12030 } 12031 } 12032 12033 /** 12034 * Called by a parent to request that a child update its values for mScrollX 12035 * and mScrollY if necessary. This will typically be done if the child is 12036 * animating a scroll using a {@link android.widget.Scroller Scroller} 12037 * object. 12038 */ 12039 public void computeScroll() { 12040 } 12041 12042 /** 12043 * <p>Indicate whether the horizontal edges are faded when the view is 12044 * scrolled horizontally.</p> 12045 * 12046 * @return true if the horizontal edges should are faded on scroll, false 12047 * otherwise 12048 * 12049 * @see #setHorizontalFadingEdgeEnabled(boolean) 12050 * 12051 * @attr ref android.R.styleable#View_requiresFadingEdge 12052 */ 12053 public boolean isHorizontalFadingEdgeEnabled() { 12054 return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; 12055 } 12056 12057 /** 12058 * <p>Define whether the horizontal edges should be faded when this view 12059 * is scrolled horizontally.</p> 12060 * 12061 * @param horizontalFadingEdgeEnabled true if the horizontal edges should 12062 * be faded when the view is scrolled 12063 * horizontally 12064 * 12065 * @see #isHorizontalFadingEdgeEnabled() 12066 * 12067 * @attr ref android.R.styleable#View_requiresFadingEdge 12068 */ 12069 public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { 12070 if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { 12071 if (horizontalFadingEdgeEnabled) { 12072 initScrollCache(); 12073 } 12074 12075 mViewFlags ^= FADING_EDGE_HORIZONTAL; 12076 } 12077 } 12078 12079 /** 12080 * <p>Indicate whether the vertical edges are faded when the view is 12081 * scrolled horizontally.</p> 12082 * 12083 * @return true if the vertical edges should are faded on scroll, false 12084 * otherwise 12085 * 12086 * @see #setVerticalFadingEdgeEnabled(boolean) 12087 * 12088 * @attr ref android.R.styleable#View_requiresFadingEdge 12089 */ 12090 public boolean isVerticalFadingEdgeEnabled() { 12091 return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; 12092 } 12093 12094 /** 12095 * <p>Define whether the vertical edges should be faded when this view 12096 * is scrolled vertically.</p> 12097 * 12098 * @param verticalFadingEdgeEnabled true if the vertical edges should 12099 * be faded when the view is scrolled 12100 * vertically 12101 * 12102 * @see #isVerticalFadingEdgeEnabled() 12103 * 12104 * @attr ref android.R.styleable#View_requiresFadingEdge 12105 */ 12106 public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { 12107 if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { 12108 if (verticalFadingEdgeEnabled) { 12109 initScrollCache(); 12110 } 12111 12112 mViewFlags ^= FADING_EDGE_VERTICAL; 12113 } 12114 } 12115 12116 /** 12117 * Returns the strength, or intensity, of the top faded edge. The strength is 12118 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 12119 * returns 0.0 or 1.0 but no value in between. 12120 * 12121 * Subclasses should override this method to provide a smoother fade transition 12122 * when scrolling occurs. 12123 * 12124 * @return the intensity of the top fade as a float between 0.0f and 1.0f 12125 */ 12126 protected float getTopFadingEdgeStrength() { 12127 return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; 12128 } 12129 12130 /** 12131 * Returns the strength, or intensity, of the bottom faded edge. The strength is 12132 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 12133 * returns 0.0 or 1.0 but no value in between. 12134 * 12135 * Subclasses should override this method to provide a smoother fade transition 12136 * when scrolling occurs. 12137 * 12138 * @return the intensity of the bottom fade as a float between 0.0f and 1.0f 12139 */ 12140 protected float getBottomFadingEdgeStrength() { 12141 return computeVerticalScrollOffset() + computeVerticalScrollExtent() < 12142 computeVerticalScrollRange() ? 1.0f : 0.0f; 12143 } 12144 12145 /** 12146 * Returns the strength, or intensity, of the left faded edge. The strength is 12147 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 12148 * returns 0.0 or 1.0 but no value in between. 12149 * 12150 * Subclasses should override this method to provide a smoother fade transition 12151 * when scrolling occurs. 12152 * 12153 * @return the intensity of the left fade as a float between 0.0f and 1.0f 12154 */ 12155 protected float getLeftFadingEdgeStrength() { 12156 return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; 12157 } 12158 12159 /** 12160 * Returns the strength, or intensity, of the right faded edge. The strength is 12161 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 12162 * returns 0.0 or 1.0 but no value in between. 12163 * 12164 * Subclasses should override this method to provide a smoother fade transition 12165 * when scrolling occurs. 12166 * 12167 * @return the intensity of the right fade as a float between 0.0f and 1.0f 12168 */ 12169 protected float getRightFadingEdgeStrength() { 12170 return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < 12171 computeHorizontalScrollRange() ? 1.0f : 0.0f; 12172 } 12173 12174 /** 12175 * <p>Indicate whether the horizontal scrollbar should be drawn or not. The 12176 * scrollbar is not drawn by default.</p> 12177 * 12178 * @return true if the horizontal scrollbar should be painted, false 12179 * otherwise 12180 * 12181 * @see #setHorizontalScrollBarEnabled(boolean) 12182 */ 12183 public boolean isHorizontalScrollBarEnabled() { 12184 return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 12185 } 12186 12187 /** 12188 * <p>Define whether the horizontal scrollbar should be drawn or not. The 12189 * scrollbar is not drawn by default.</p> 12190 * 12191 * @param horizontalScrollBarEnabled true if the horizontal scrollbar should 12192 * be painted 12193 * 12194 * @see #isHorizontalScrollBarEnabled() 12195 */ 12196 public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { 12197 if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { 12198 mViewFlags ^= SCROLLBARS_HORIZONTAL; 12199 computeOpaqueFlags(); 12200 resolvePadding(); 12201 } 12202 } 12203 12204 /** 12205 * <p>Indicate whether the vertical scrollbar should be drawn or not. The 12206 * scrollbar is not drawn by default.</p> 12207 * 12208 * @return true if the vertical scrollbar should be painted, false 12209 * otherwise 12210 * 12211 * @see #setVerticalScrollBarEnabled(boolean) 12212 */ 12213 public boolean isVerticalScrollBarEnabled() { 12214 return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; 12215 } 12216 12217 /** 12218 * <p>Define whether the vertical scrollbar should be drawn or not. The 12219 * scrollbar is not drawn by default.</p> 12220 * 12221 * @param verticalScrollBarEnabled true if the vertical scrollbar should 12222 * be painted 12223 * 12224 * @see #isVerticalScrollBarEnabled() 12225 */ 12226 public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { 12227 if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { 12228 mViewFlags ^= SCROLLBARS_VERTICAL; 12229 computeOpaqueFlags(); 12230 resolvePadding(); 12231 } 12232 } 12233 12234 /** 12235 * @hide 12236 */ 12237 protected void recomputePadding() { 12238 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 12239 } 12240 12241 /** 12242 * Define whether scrollbars will fade when the view is not scrolling. 12243 * 12244 * @param fadeScrollbars wheter to enable fading 12245 * 12246 * @attr ref android.R.styleable#View_fadeScrollbars 12247 */ 12248 public void setScrollbarFadingEnabled(boolean fadeScrollbars) { 12249 initScrollCache(); 12250 final ScrollabilityCache scrollabilityCache = mScrollCache; 12251 scrollabilityCache.fadeScrollBars = fadeScrollbars; 12252 if (fadeScrollbars) { 12253 scrollabilityCache.state = ScrollabilityCache.OFF; 12254 } else { 12255 scrollabilityCache.state = ScrollabilityCache.ON; 12256 } 12257 } 12258 12259 /** 12260 * 12261 * Returns true if scrollbars will fade when this view is not scrolling 12262 * 12263 * @return true if scrollbar fading is enabled 12264 * 12265 * @attr ref android.R.styleable#View_fadeScrollbars 12266 */ 12267 public boolean isScrollbarFadingEnabled() { 12268 return mScrollCache != null && mScrollCache.fadeScrollBars; 12269 } 12270 12271 /** 12272 * 12273 * Returns the delay before scrollbars fade. 12274 * 12275 * @return the delay before scrollbars fade 12276 * 12277 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 12278 */ 12279 public int getScrollBarDefaultDelayBeforeFade() { 12280 return mScrollCache == null ? ViewConfiguration.getScrollDefaultDelay() : 12281 mScrollCache.scrollBarDefaultDelayBeforeFade; 12282 } 12283 12284 /** 12285 * Define the delay before scrollbars fade. 12286 * 12287 * @param scrollBarDefaultDelayBeforeFade - the delay before scrollbars fade 12288 * 12289 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 12290 */ 12291 public void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) { 12292 getScrollCache().scrollBarDefaultDelayBeforeFade = scrollBarDefaultDelayBeforeFade; 12293 } 12294 12295 /** 12296 * 12297 * Returns the scrollbar fade duration. 12298 * 12299 * @return the scrollbar fade duration 12300 * 12301 * @attr ref android.R.styleable#View_scrollbarFadeDuration 12302 */ 12303 public int getScrollBarFadeDuration() { 12304 return mScrollCache == null ? ViewConfiguration.getScrollBarFadeDuration() : 12305 mScrollCache.scrollBarFadeDuration; 12306 } 12307 12308 /** 12309 * Define the scrollbar fade duration. 12310 * 12311 * @param scrollBarFadeDuration - the scrollbar fade duration 12312 * 12313 * @attr ref android.R.styleable#View_scrollbarFadeDuration 12314 */ 12315 public void setScrollBarFadeDuration(int scrollBarFadeDuration) { 12316 getScrollCache().scrollBarFadeDuration = scrollBarFadeDuration; 12317 } 12318 12319 /** 12320 * 12321 * Returns the scrollbar size. 12322 * 12323 * @return the scrollbar size 12324 * 12325 * @attr ref android.R.styleable#View_scrollbarSize 12326 */ 12327 public int getScrollBarSize() { 12328 return mScrollCache == null ? ViewConfiguration.get(mContext).getScaledScrollBarSize() : 12329 mScrollCache.scrollBarSize; 12330 } 12331 12332 /** 12333 * Define the scrollbar size. 12334 * 12335 * @param scrollBarSize - the scrollbar size 12336 * 12337 * @attr ref android.R.styleable#View_scrollbarSize 12338 */ 12339 public void setScrollBarSize(int scrollBarSize) { 12340 getScrollCache().scrollBarSize = scrollBarSize; 12341 } 12342 12343 /** 12344 * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or 12345 * inset. When inset, they add to the padding of the view. And the scrollbars 12346 * can be drawn inside the padding area or on the edge of the view. For example, 12347 * if a view has a background drawable and you want to draw the scrollbars 12348 * inside the padding specified by the drawable, you can use 12349 * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to 12350 * appear at the edge of the view, ignoring the padding, then you can use 12351 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> 12352 * @param style the style of the scrollbars. Should be one of 12353 * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, 12354 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. 12355 * @see #SCROLLBARS_INSIDE_OVERLAY 12356 * @see #SCROLLBARS_INSIDE_INSET 12357 * @see #SCROLLBARS_OUTSIDE_OVERLAY 12358 * @see #SCROLLBARS_OUTSIDE_INSET 12359 * 12360 * @attr ref android.R.styleable#View_scrollbarStyle 12361 */ 12362 public void setScrollBarStyle(@ScrollBarStyle int style) { 12363 if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { 12364 mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); 12365 computeOpaqueFlags(); 12366 resolvePadding(); 12367 } 12368 } 12369 12370 /** 12371 * <p>Returns the current scrollbar style.</p> 12372 * @return the current scrollbar style 12373 * @see #SCROLLBARS_INSIDE_OVERLAY 12374 * @see #SCROLLBARS_INSIDE_INSET 12375 * @see #SCROLLBARS_OUTSIDE_OVERLAY 12376 * @see #SCROLLBARS_OUTSIDE_INSET 12377 * 12378 * @attr ref android.R.styleable#View_scrollbarStyle 12379 */ 12380 @ViewDebug.ExportedProperty(mapping = { 12381 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), 12382 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), 12383 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), 12384 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") 12385 }) 12386 @ScrollBarStyle 12387 public int getScrollBarStyle() { 12388 return mViewFlags & SCROLLBARS_STYLE_MASK; 12389 } 12390 12391 /** 12392 * <p>Compute the horizontal range that the horizontal scrollbar 12393 * represents.</p> 12394 * 12395 * <p>The range is expressed in arbitrary units that must be the same as the 12396 * units used by {@link #computeHorizontalScrollExtent()} and 12397 * {@link #computeHorizontalScrollOffset()}.</p> 12398 * 12399 * <p>The default range is the drawing width of this view.</p> 12400 * 12401 * @return the total horizontal range represented by the horizontal 12402 * scrollbar 12403 * 12404 * @see #computeHorizontalScrollExtent() 12405 * @see #computeHorizontalScrollOffset() 12406 * @see android.widget.ScrollBarDrawable 12407 */ 12408 protected int computeHorizontalScrollRange() { 12409 return getWidth(); 12410 } 12411 12412 /** 12413 * <p>Compute the horizontal offset of the horizontal scrollbar's thumb 12414 * within the horizontal range. This value is used to compute the position 12415 * of the thumb within the scrollbar's track.</p> 12416 * 12417 * <p>The range is expressed in arbitrary units that must be the same as the 12418 * units used by {@link #computeHorizontalScrollRange()} and 12419 * {@link #computeHorizontalScrollExtent()}.</p> 12420 * 12421 * <p>The default offset is the scroll offset of this view.</p> 12422 * 12423 * @return the horizontal offset of the scrollbar's thumb 12424 * 12425 * @see #computeHorizontalScrollRange() 12426 * @see #computeHorizontalScrollExtent() 12427 * @see android.widget.ScrollBarDrawable 12428 */ 12429 protected int computeHorizontalScrollOffset() { 12430 return mScrollX; 12431 } 12432 12433 /** 12434 * <p>Compute the horizontal extent of the horizontal scrollbar's thumb 12435 * within the horizontal range. This value is used to compute the length 12436 * of the thumb within the scrollbar's track.</p> 12437 * 12438 * <p>The range is expressed in arbitrary units that must be the same as the 12439 * units used by {@link #computeHorizontalScrollRange()} and 12440 * {@link #computeHorizontalScrollOffset()}.</p> 12441 * 12442 * <p>The default extent is the drawing width of this view.</p> 12443 * 12444 * @return the horizontal extent of the scrollbar's thumb 12445 * 12446 * @see #computeHorizontalScrollRange() 12447 * @see #computeHorizontalScrollOffset() 12448 * @see android.widget.ScrollBarDrawable 12449 */ 12450 protected int computeHorizontalScrollExtent() { 12451 return getWidth(); 12452 } 12453 12454 /** 12455 * <p>Compute the vertical range that the vertical scrollbar represents.</p> 12456 * 12457 * <p>The range is expressed in arbitrary units that must be the same as the 12458 * units used by {@link #computeVerticalScrollExtent()} and 12459 * {@link #computeVerticalScrollOffset()}.</p> 12460 * 12461 * @return the total vertical range represented by the vertical scrollbar 12462 * 12463 * <p>The default range is the drawing height of this view.</p> 12464 * 12465 * @see #computeVerticalScrollExtent() 12466 * @see #computeVerticalScrollOffset() 12467 * @see android.widget.ScrollBarDrawable 12468 */ 12469 protected int computeVerticalScrollRange() { 12470 return getHeight(); 12471 } 12472 12473 /** 12474 * <p>Compute the vertical offset of the vertical scrollbar's thumb 12475 * within the horizontal range. This value is used to compute the position 12476 * of the thumb within the scrollbar's track.</p> 12477 * 12478 * <p>The range is expressed in arbitrary units that must be the same as the 12479 * units used by {@link #computeVerticalScrollRange()} and 12480 * {@link #computeVerticalScrollExtent()}.</p> 12481 * 12482 * <p>The default offset is the scroll offset of this view.</p> 12483 * 12484 * @return the vertical offset of the scrollbar's thumb 12485 * 12486 * @see #computeVerticalScrollRange() 12487 * @see #computeVerticalScrollExtent() 12488 * @see android.widget.ScrollBarDrawable 12489 */ 12490 protected int computeVerticalScrollOffset() { 12491 return mScrollY; 12492 } 12493 12494 /** 12495 * <p>Compute the vertical extent of the vertical scrollbar's thumb 12496 * within the vertical range. This value is used to compute the length 12497 * of the thumb within the scrollbar's track.</p> 12498 * 12499 * <p>The range is expressed in arbitrary units that must be the same as the 12500 * units used by {@link #computeVerticalScrollRange()} and 12501 * {@link #computeVerticalScrollOffset()}.</p> 12502 * 12503 * <p>The default extent is the drawing height of this view.</p> 12504 * 12505 * @return the vertical extent of the scrollbar's thumb 12506 * 12507 * @see #computeVerticalScrollRange() 12508 * @see #computeVerticalScrollOffset() 12509 * @see android.widget.ScrollBarDrawable 12510 */ 12511 protected int computeVerticalScrollExtent() { 12512 return getHeight(); 12513 } 12514 12515 /** 12516 * Check if this view can be scrolled horizontally in a certain direction. 12517 * 12518 * @param direction Negative to check scrolling left, positive to check scrolling right. 12519 * @return true if this view can be scrolled in the specified direction, false otherwise. 12520 */ 12521 public boolean canScrollHorizontally(int direction) { 12522 final int offset = computeHorizontalScrollOffset(); 12523 final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); 12524 if (range == 0) return false; 12525 if (direction < 0) { 12526 return offset > 0; 12527 } else { 12528 return offset < range - 1; 12529 } 12530 } 12531 12532 /** 12533 * Check if this view can be scrolled vertically in a certain direction. 12534 * 12535 * @param direction Negative to check scrolling up, positive to check scrolling down. 12536 * @return true if this view can be scrolled in the specified direction, false otherwise. 12537 */ 12538 public boolean canScrollVertically(int direction) { 12539 final int offset = computeVerticalScrollOffset(); 12540 final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); 12541 if (range == 0) return false; 12542 if (direction < 0) { 12543 return offset > 0; 12544 } else { 12545 return offset < range - 1; 12546 } 12547 } 12548 12549 /** 12550 * <p>Request the drawing of the horizontal and the vertical scrollbar. The 12551 * scrollbars are painted only if they have been awakened first.</p> 12552 * 12553 * @param canvas the canvas on which to draw the scrollbars 12554 * 12555 * @see #awakenScrollBars(int) 12556 */ 12557 protected final void onDrawScrollBars(Canvas canvas) { 12558 // scrollbars are drawn only when the animation is running 12559 final ScrollabilityCache cache = mScrollCache; 12560 if (cache != null) { 12561 12562 int state = cache.state; 12563 12564 if (state == ScrollabilityCache.OFF) { 12565 return; 12566 } 12567 12568 boolean invalidate = false; 12569 12570 if (state == ScrollabilityCache.FADING) { 12571 // We're fading -- get our fade interpolation 12572 if (cache.interpolatorValues == null) { 12573 cache.interpolatorValues = new float[1]; 12574 } 12575 12576 float[] values = cache.interpolatorValues; 12577 12578 // Stops the animation if we're done 12579 if (cache.scrollBarInterpolator.timeToValues(values) == 12580 Interpolator.Result.FREEZE_END) { 12581 cache.state = ScrollabilityCache.OFF; 12582 } else { 12583 cache.scrollBar.setAlpha(Math.round(values[0])); 12584 } 12585 12586 // This will make the scroll bars inval themselves after 12587 // drawing. We only want this when we're fading so that 12588 // we prevent excessive redraws 12589 invalidate = true; 12590 } else { 12591 // We're just on -- but we may have been fading before so 12592 // reset alpha 12593 cache.scrollBar.setAlpha(255); 12594 } 12595 12596 12597 final int viewFlags = mViewFlags; 12598 12599 final boolean drawHorizontalScrollBar = 12600 (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 12601 final boolean drawVerticalScrollBar = 12602 (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL 12603 && !isVerticalScrollBarHidden(); 12604 12605 if (drawVerticalScrollBar || drawHorizontalScrollBar) { 12606 final int width = mRight - mLeft; 12607 final int height = mBottom - mTop; 12608 12609 final ScrollBarDrawable scrollBar = cache.scrollBar; 12610 12611 final int scrollX = mScrollX; 12612 final int scrollY = mScrollY; 12613 final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; 12614 12615 int left; 12616 int top; 12617 int right; 12618 int bottom; 12619 12620 if (drawHorizontalScrollBar) { 12621 int size = scrollBar.getSize(false); 12622 if (size <= 0) { 12623 size = cache.scrollBarSize; 12624 } 12625 12626 scrollBar.setParameters(computeHorizontalScrollRange(), 12627 computeHorizontalScrollOffset(), 12628 computeHorizontalScrollExtent(), false); 12629 final int verticalScrollBarGap = drawVerticalScrollBar ? 12630 getVerticalScrollbarWidth() : 0; 12631 top = scrollY + height - size - (mUserPaddingBottom & inside); 12632 left = scrollX + (mPaddingLeft & inside); 12633 right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; 12634 bottom = top + size; 12635 onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); 12636 if (invalidate) { 12637 invalidate(left, top, right, bottom); 12638 } 12639 } 12640 12641 if (drawVerticalScrollBar) { 12642 int size = scrollBar.getSize(true); 12643 if (size <= 0) { 12644 size = cache.scrollBarSize; 12645 } 12646 12647 scrollBar.setParameters(computeVerticalScrollRange(), 12648 computeVerticalScrollOffset(), 12649 computeVerticalScrollExtent(), true); 12650 int verticalScrollbarPosition = mVerticalScrollbarPosition; 12651 if (verticalScrollbarPosition == SCROLLBAR_POSITION_DEFAULT) { 12652 verticalScrollbarPosition = isLayoutRtl() ? 12653 SCROLLBAR_POSITION_LEFT : SCROLLBAR_POSITION_RIGHT; 12654 } 12655 switch (verticalScrollbarPosition) { 12656 default: 12657 case SCROLLBAR_POSITION_RIGHT: 12658 left = scrollX + width - size - (mUserPaddingRight & inside); 12659 break; 12660 case SCROLLBAR_POSITION_LEFT: 12661 left = scrollX + (mUserPaddingLeft & inside); 12662 break; 12663 } 12664 top = scrollY + (mPaddingTop & inside); 12665 right = left + size; 12666 bottom = scrollY + height - (mUserPaddingBottom & inside); 12667 onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); 12668 if (invalidate) { 12669 invalidate(left, top, right, bottom); 12670 } 12671 } 12672 } 12673 } 12674 } 12675 12676 /** 12677 * Override this if the vertical scrollbar needs to be hidden in a subclass, like when 12678 * FastScroller is visible. 12679 * @return whether to temporarily hide the vertical scrollbar 12680 * @hide 12681 */ 12682 protected boolean isVerticalScrollBarHidden() { 12683 return false; 12684 } 12685 12686 /** 12687 * <p>Draw the horizontal scrollbar if 12688 * {@link #isHorizontalScrollBarEnabled()} returns true.</p> 12689 * 12690 * @param canvas the canvas on which to draw the scrollbar 12691 * @param scrollBar the scrollbar's drawable 12692 * 12693 * @see #isHorizontalScrollBarEnabled() 12694 * @see #computeHorizontalScrollRange() 12695 * @see #computeHorizontalScrollExtent() 12696 * @see #computeHorizontalScrollOffset() 12697 * @see android.widget.ScrollBarDrawable 12698 * @hide 12699 */ 12700 protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, 12701 int l, int t, int r, int b) { 12702 scrollBar.setBounds(l, t, r, b); 12703 scrollBar.draw(canvas); 12704 } 12705 12706 /** 12707 * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} 12708 * returns true.</p> 12709 * 12710 * @param canvas the canvas on which to draw the scrollbar 12711 * @param scrollBar the scrollbar's drawable 12712 * 12713 * @see #isVerticalScrollBarEnabled() 12714 * @see #computeVerticalScrollRange() 12715 * @see #computeVerticalScrollExtent() 12716 * @see #computeVerticalScrollOffset() 12717 * @see android.widget.ScrollBarDrawable 12718 * @hide 12719 */ 12720 protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, 12721 int l, int t, int r, int b) { 12722 scrollBar.setBounds(l, t, r, b); 12723 scrollBar.draw(canvas); 12724 } 12725 12726 /** 12727 * Implement this to do your drawing. 12728 * 12729 * @param canvas the canvas on which the background will be drawn 12730 */ 12731 protected void onDraw(Canvas canvas) { 12732 } 12733 12734 /* 12735 * Caller is responsible for calling requestLayout if necessary. 12736 * (This allows addViewInLayout to not request a new layout.) 12737 */ 12738 void assignParent(ViewParent parent) { 12739 if (mParent == null) { 12740 mParent = parent; 12741 } else if (parent == null) { 12742 mParent = null; 12743 } else { 12744 throw new RuntimeException("view " + this + " being added, but" 12745 + " it already has a parent"); 12746 } 12747 } 12748 12749 /** 12750 * This is called when the view is attached to a window. At this point it 12751 * has a Surface and will start drawing. Note that this function is 12752 * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, 12753 * however it may be called any time before the first onDraw -- including 12754 * before or after {@link #onMeasure(int, int)}. 12755 * 12756 * @see #onDetachedFromWindow() 12757 */ 12758 protected void onAttachedToWindow() { 12759 if ((mPrivateFlags & PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 12760 mParent.requestTransparentRegion(this); 12761 } 12762 12763 if ((mPrivateFlags & PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH) != 0) { 12764 initialAwakenScrollBars(); 12765 mPrivateFlags &= ~PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH; 12766 } 12767 12768 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 12769 12770 jumpDrawablesToCurrentState(); 12771 12772 resetSubtreeAccessibilityStateChanged(); 12773 12774 invalidateOutline(); 12775 12776 if (isFocused()) { 12777 InputMethodManager imm = InputMethodManager.peekInstance(); 12778 imm.focusIn(this); 12779 } 12780 } 12781 12782 /** 12783 * Resolve all RTL related properties. 12784 * 12785 * @return true if resolution of RTL properties has been done 12786 * 12787 * @hide 12788 */ 12789 public boolean resolveRtlPropertiesIfNeeded() { 12790 if (!needRtlPropertiesResolution()) return false; 12791 12792 // Order is important here: LayoutDirection MUST be resolved first 12793 if (!isLayoutDirectionResolved()) { 12794 resolveLayoutDirection(); 12795 resolveLayoutParams(); 12796 } 12797 // ... then we can resolve the others properties depending on the resolved LayoutDirection. 12798 if (!isTextDirectionResolved()) { 12799 resolveTextDirection(); 12800 } 12801 if (!isTextAlignmentResolved()) { 12802 resolveTextAlignment(); 12803 } 12804 // Should resolve Drawables before Padding because we need the layout direction of the 12805 // Drawable to correctly resolve Padding. 12806 if (!isDrawablesResolved()) { 12807 resolveDrawables(); 12808 } 12809 if (!isPaddingResolved()) { 12810 resolvePadding(); 12811 } 12812 onRtlPropertiesChanged(getLayoutDirection()); 12813 return true; 12814 } 12815 12816 /** 12817 * Reset resolution of all RTL related properties. 12818 * 12819 * @hide 12820 */ 12821 public void resetRtlProperties() { 12822 resetResolvedLayoutDirection(); 12823 resetResolvedTextDirection(); 12824 resetResolvedTextAlignment(); 12825 resetResolvedPadding(); 12826 resetResolvedDrawables(); 12827 } 12828 12829 /** 12830 * @see #onScreenStateChanged(int) 12831 */ 12832 void dispatchScreenStateChanged(int screenState) { 12833 onScreenStateChanged(screenState); 12834 } 12835 12836 /** 12837 * This method is called whenever the state of the screen this view is 12838 * attached to changes. A state change will usually occurs when the screen 12839 * turns on or off (whether it happens automatically or the user does it 12840 * manually.) 12841 * 12842 * @param screenState The new state of the screen. Can be either 12843 * {@link #SCREEN_STATE_ON} or {@link #SCREEN_STATE_OFF} 12844 */ 12845 public void onScreenStateChanged(int screenState) { 12846 } 12847 12848 /** 12849 * Return true if the application tag in the AndroidManifest has set "supportRtl" to true 12850 */ 12851 private boolean hasRtlSupport() { 12852 return mContext.getApplicationInfo().hasRtlSupport(); 12853 } 12854 12855 /** 12856 * Return true if we are in RTL compatibility mode (either before Jelly Bean MR1 or 12857 * RTL not supported) 12858 */ 12859 private boolean isRtlCompatibilityMode() { 12860 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 12861 return targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport(); 12862 } 12863 12864 /** 12865 * @return true if RTL properties need resolution. 12866 * 12867 */ 12868 private boolean needRtlPropertiesResolution() { 12869 return (mPrivateFlags2 & ALL_RTL_PROPERTIES_RESOLVED) != ALL_RTL_PROPERTIES_RESOLVED; 12870 } 12871 12872 /** 12873 * Called when any RTL property (layout direction or text direction or text alignment) has 12874 * been changed. 12875 * 12876 * Subclasses need to override this method to take care of cached information that depends on the 12877 * resolved layout direction, or to inform child views that inherit their layout direction. 12878 * 12879 * The default implementation does nothing. 12880 * 12881 * @param layoutDirection the direction of the layout 12882 * 12883 * @see #LAYOUT_DIRECTION_LTR 12884 * @see #LAYOUT_DIRECTION_RTL 12885 */ 12886 public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { 12887 } 12888 12889 /** 12890 * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing 12891 * that the parent directionality can and will be resolved before its children. 12892 * 12893 * @return true if resolution has been done, false otherwise. 12894 * 12895 * @hide 12896 */ 12897 public boolean resolveLayoutDirection() { 12898 // Clear any previous layout direction resolution 12899 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 12900 12901 if (hasRtlSupport()) { 12902 // Set resolved depending on layout direction 12903 switch ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> 12904 PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) { 12905 case LAYOUT_DIRECTION_INHERIT: 12906 // We cannot resolve yet. LTR is by default and let the resolution happen again 12907 // later to get the correct resolved value 12908 if (!canResolveLayoutDirection()) return false; 12909 12910 // Parent has not yet resolved, LTR is still the default 12911 try { 12912 if (!mParent.isLayoutDirectionResolved()) return false; 12913 12914 if (mParent.getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 12915 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 12916 } 12917 } catch (AbstractMethodError e) { 12918 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 12919 " does not fully implement ViewParent", e); 12920 } 12921 break; 12922 case LAYOUT_DIRECTION_RTL: 12923 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 12924 break; 12925 case LAYOUT_DIRECTION_LOCALE: 12926 if((LAYOUT_DIRECTION_RTL == 12927 TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()))) { 12928 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 12929 } 12930 break; 12931 default: 12932 // Nothing to do, LTR by default 12933 } 12934 } 12935 12936 // Set to resolved 12937 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 12938 return true; 12939 } 12940 12941 /** 12942 * Check if layout direction resolution can be done. 12943 * 12944 * @return true if layout direction resolution can be done otherwise return false. 12945 */ 12946 public boolean canResolveLayoutDirection() { 12947 switch (getRawLayoutDirection()) { 12948 case LAYOUT_DIRECTION_INHERIT: 12949 if (mParent != null) { 12950 try { 12951 return mParent.canResolveLayoutDirection(); 12952 } catch (AbstractMethodError e) { 12953 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 12954 " does not fully implement ViewParent", e); 12955 } 12956 } 12957 return false; 12958 12959 default: 12960 return true; 12961 } 12962 } 12963 12964 /** 12965 * Reset the resolved layout direction. Layout direction will be resolved during a call to 12966 * {@link #onMeasure(int, int)}. 12967 * 12968 * @hide 12969 */ 12970 public void resetResolvedLayoutDirection() { 12971 // Reset the current resolved bits 12972 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 12973 } 12974 12975 /** 12976 * @return true if the layout direction is inherited. 12977 * 12978 * @hide 12979 */ 12980 public boolean isLayoutDirectionInherited() { 12981 return (getRawLayoutDirection() == LAYOUT_DIRECTION_INHERIT); 12982 } 12983 12984 /** 12985 * @return true if layout direction has been resolved. 12986 */ 12987 public boolean isLayoutDirectionResolved() { 12988 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED) == PFLAG2_LAYOUT_DIRECTION_RESOLVED; 12989 } 12990 12991 /** 12992 * Return if padding has been resolved 12993 * 12994 * @hide 12995 */ 12996 boolean isPaddingResolved() { 12997 return (mPrivateFlags2 & PFLAG2_PADDING_RESOLVED) == PFLAG2_PADDING_RESOLVED; 12998 } 12999 13000 /** 13001 * Resolves padding depending on layout direction, if applicable, and 13002 * recomputes internal padding values to adjust for scroll bars. 13003 * 13004 * @hide 13005 */ 13006 public void resolvePadding() { 13007 final int resolvedLayoutDirection = getLayoutDirection(); 13008 13009 if (!isRtlCompatibilityMode()) { 13010 // Post Jelly Bean MR1 case: we need to take the resolved layout direction into account. 13011 // If start / end padding are defined, they will be resolved (hence overriding) to 13012 // left / right or right / left depending on the resolved layout direction. 13013 // If start / end padding are not defined, use the left / right ones. 13014 if (mBackground != null && (!mLeftPaddingDefined || !mRightPaddingDefined)) { 13015 Rect padding = sThreadLocal.get(); 13016 if (padding == null) { 13017 padding = new Rect(); 13018 sThreadLocal.set(padding); 13019 } 13020 mBackground.getPadding(padding); 13021 if (!mLeftPaddingDefined) { 13022 mUserPaddingLeftInitial = padding.left; 13023 } 13024 if (!mRightPaddingDefined) { 13025 mUserPaddingRightInitial = padding.right; 13026 } 13027 } 13028 switch (resolvedLayoutDirection) { 13029 case LAYOUT_DIRECTION_RTL: 13030 if (mUserPaddingStart != UNDEFINED_PADDING) { 13031 mUserPaddingRight = mUserPaddingStart; 13032 } else { 13033 mUserPaddingRight = mUserPaddingRightInitial; 13034 } 13035 if (mUserPaddingEnd != UNDEFINED_PADDING) { 13036 mUserPaddingLeft = mUserPaddingEnd; 13037 } else { 13038 mUserPaddingLeft = mUserPaddingLeftInitial; 13039 } 13040 break; 13041 case LAYOUT_DIRECTION_LTR: 13042 default: 13043 if (mUserPaddingStart != UNDEFINED_PADDING) { 13044 mUserPaddingLeft = mUserPaddingStart; 13045 } else { 13046 mUserPaddingLeft = mUserPaddingLeftInitial; 13047 } 13048 if (mUserPaddingEnd != UNDEFINED_PADDING) { 13049 mUserPaddingRight = mUserPaddingEnd; 13050 } else { 13051 mUserPaddingRight = mUserPaddingRightInitial; 13052 } 13053 } 13054 13055 mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; 13056 } 13057 13058 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 13059 onRtlPropertiesChanged(resolvedLayoutDirection); 13060 13061 mPrivateFlags2 |= PFLAG2_PADDING_RESOLVED; 13062 } 13063 13064 /** 13065 * Reset the resolved layout direction. 13066 * 13067 * @hide 13068 */ 13069 public void resetResolvedPadding() { 13070 mPrivateFlags2 &= ~PFLAG2_PADDING_RESOLVED; 13071 } 13072 13073 /** 13074 * This is called when the view is detached from a window. At this point it 13075 * no longer has a surface for drawing. 13076 * 13077 * @see #onAttachedToWindow() 13078 */ 13079 protected void onDetachedFromWindow() { 13080 } 13081 13082 /** 13083 * This is a framework-internal mirror of onDetachedFromWindow() that's called 13084 * after onDetachedFromWindow(). 13085 * 13086 * If you override this you *MUST* call super.onDetachedFromWindowInternal()! 13087 * The super method should be called at the end of the overriden method to ensure 13088 * subclasses are destroyed first 13089 * 13090 * @hide 13091 */ 13092 protected void onDetachedFromWindowInternal() { 13093 mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT; 13094 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 13095 13096 removeUnsetPressCallback(); 13097 removeLongPressCallback(); 13098 removePerformClickCallback(); 13099 removeSendViewScrolledAccessibilityEventCallback(); 13100 stopNestedScroll(); 13101 13102 // Anything that started animating right before detach should already 13103 // be in its final state when re-attached. 13104 jumpDrawablesToCurrentState(); 13105 13106 destroyDrawingCache(); 13107 13108 cleanupDraw(); 13109 mCurrentAnimation = null; 13110 } 13111 13112 private void cleanupDraw() { 13113 resetDisplayList(); 13114 if (mAttachInfo != null) { 13115 mAttachInfo.mViewRootImpl.cancelInvalidate(this); 13116 } 13117 } 13118 13119 void invalidateInheritedLayoutMode(int layoutModeOfRoot) { 13120 } 13121 13122 /** 13123 * @return The number of times this view has been attached to a window 13124 */ 13125 protected int getWindowAttachCount() { 13126 return mWindowAttachCount; 13127 } 13128 13129 /** 13130 * Retrieve a unique token identifying the window this view is attached to. 13131 * @return Return the window's token for use in 13132 * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. 13133 */ 13134 public IBinder getWindowToken() { 13135 return mAttachInfo != null ? mAttachInfo.mWindowToken : null; 13136 } 13137 13138 /** 13139 * Retrieve the {@link WindowId} for the window this view is 13140 * currently attached to. 13141 */ 13142 public WindowId getWindowId() { 13143 if (mAttachInfo == null) { 13144 return null; 13145 } 13146 if (mAttachInfo.mWindowId == null) { 13147 try { 13148 mAttachInfo.mIWindowId = mAttachInfo.mSession.getWindowId( 13149 mAttachInfo.mWindowToken); 13150 mAttachInfo.mWindowId = new WindowId( 13151 mAttachInfo.mIWindowId); 13152 } catch (RemoteException e) { 13153 } 13154 } 13155 return mAttachInfo.mWindowId; 13156 } 13157 13158 /** 13159 * Retrieve a unique token identifying the top-level "real" window of 13160 * the window that this view is attached to. That is, this is like 13161 * {@link #getWindowToken}, except if the window this view in is a panel 13162 * window (attached to another containing window), then the token of 13163 * the containing window is returned instead. 13164 * 13165 * @return Returns the associated window token, either 13166 * {@link #getWindowToken()} or the containing window's token. 13167 */ 13168 public IBinder getApplicationWindowToken() { 13169 AttachInfo ai = mAttachInfo; 13170 if (ai != null) { 13171 IBinder appWindowToken = ai.mPanelParentWindowToken; 13172 if (appWindowToken == null) { 13173 appWindowToken = ai.mWindowToken; 13174 } 13175 return appWindowToken; 13176 } 13177 return null; 13178 } 13179 13180 /** 13181 * Gets the logical display to which the view's window has been attached. 13182 * 13183 * @return The logical display, or null if the view is not currently attached to a window. 13184 */ 13185 public Display getDisplay() { 13186 return mAttachInfo != null ? mAttachInfo.mDisplay : null; 13187 } 13188 13189 /** 13190 * Retrieve private session object this view hierarchy is using to 13191 * communicate with the window manager. 13192 * @return the session object to communicate with the window manager 13193 */ 13194 /*package*/ IWindowSession getWindowSession() { 13195 return mAttachInfo != null ? mAttachInfo.mSession : null; 13196 } 13197 13198 /** 13199 * @param info the {@link android.view.View.AttachInfo} to associated with 13200 * this view 13201 */ 13202 void dispatchAttachedToWindow(AttachInfo info, int visibility) { 13203 //System.out.println("Attached! " + this); 13204 mAttachInfo = info; 13205 if (mOverlay != null) { 13206 mOverlay.getOverlayView().dispatchAttachedToWindow(info, visibility); 13207 } 13208 mWindowAttachCount++; 13209 // We will need to evaluate the drawable state at least once. 13210 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 13211 if (mFloatingTreeObserver != null) { 13212 info.mTreeObserver.merge(mFloatingTreeObserver); 13213 mFloatingTreeObserver = null; 13214 } 13215 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER) != 0) { 13216 mAttachInfo.mScrollContainers.add(this); 13217 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 13218 } 13219 performCollectViewAttributes(mAttachInfo, visibility); 13220 onAttachedToWindow(); 13221 13222 ListenerInfo li = mListenerInfo; 13223 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 13224 li != null ? li.mOnAttachStateChangeListeners : null; 13225 if (listeners != null && listeners.size() > 0) { 13226 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 13227 // perform the dispatching. The iterator is a safe guard against listeners that 13228 // could mutate the list by calling the various add/remove methods. This prevents 13229 // the array from being modified while we iterate it. 13230 for (OnAttachStateChangeListener listener : listeners) { 13231 listener.onViewAttachedToWindow(this); 13232 } 13233 } 13234 13235 int vis = info.mWindowVisibility; 13236 if (vis != GONE) { 13237 onWindowVisibilityChanged(vis); 13238 } 13239 if ((mPrivateFlags&PFLAG_DRAWABLE_STATE_DIRTY) != 0) { 13240 // If nobody has evaluated the drawable state yet, then do it now. 13241 refreshDrawableState(); 13242 } 13243 needGlobalAttributesUpdate(false); 13244 } 13245 13246 void dispatchDetachedFromWindow() { 13247 AttachInfo info = mAttachInfo; 13248 if (info != null) { 13249 int vis = info.mWindowVisibility; 13250 if (vis != GONE) { 13251 onWindowVisibilityChanged(GONE); 13252 } 13253 } 13254 13255 onDetachedFromWindow(); 13256 onDetachedFromWindowInternal(); 13257 13258 ListenerInfo li = mListenerInfo; 13259 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 13260 li != null ? li.mOnAttachStateChangeListeners : null; 13261 if (listeners != null && listeners.size() > 0) { 13262 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 13263 // perform the dispatching. The iterator is a safe guard against listeners that 13264 // could mutate the list by calling the various add/remove methods. This prevents 13265 // the array from being modified while we iterate it. 13266 for (OnAttachStateChangeListener listener : listeners) { 13267 listener.onViewDetachedFromWindow(this); 13268 } 13269 } 13270 13271 if ((mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 13272 mAttachInfo.mScrollContainers.remove(this); 13273 mPrivateFlags &= ~PFLAG_SCROLL_CONTAINER_ADDED; 13274 } 13275 13276 mAttachInfo = null; 13277 if (mOverlay != null) { 13278 mOverlay.getOverlayView().dispatchDetachedFromWindow(); 13279 } 13280 } 13281 13282 /** 13283 * Cancel any deferred high-level input events that were previously posted to the event queue. 13284 * 13285 * <p>Many views post high-level events such as click handlers to the event queue 13286 * to run deferred in order to preserve a desired user experience - clearing visible 13287 * pressed states before executing, etc. This method will abort any events of this nature 13288 * that are currently in flight.</p> 13289 * 13290 * <p>Custom views that generate their own high-level deferred input events should override 13291 * {@link #onCancelPendingInputEvents()} and remove those pending events from the queue.</p> 13292 * 13293 * <p>This will also cancel pending input events for any child views.</p> 13294 * 13295 * <p>Note that this may not be sufficient as a debouncing strategy for clicks in all cases. 13296 * This will not impact newer events posted after this call that may occur as a result of 13297 * lower-level input events still waiting in the queue. If you are trying to prevent 13298 * double-submitted events for the duration of some sort of asynchronous transaction 13299 * you should also take other steps to protect against unexpected double inputs e.g. calling 13300 * {@link #setEnabled(boolean) setEnabled(false)} and re-enabling the view when 13301 * the transaction completes, tracking already submitted transaction IDs, etc.</p> 13302 */ 13303 public final void cancelPendingInputEvents() { 13304 dispatchCancelPendingInputEvents(); 13305 } 13306 13307 /** 13308 * Called by {@link #cancelPendingInputEvents()} to cancel input events in flight. 13309 * Overridden by ViewGroup to dispatch. Package scoped to prevent app-side meddling. 13310 */ 13311 void dispatchCancelPendingInputEvents() { 13312 mPrivateFlags3 &= ~PFLAG3_CALLED_SUPER; 13313 onCancelPendingInputEvents(); 13314 if ((mPrivateFlags3 & PFLAG3_CALLED_SUPER) != PFLAG3_CALLED_SUPER) { 13315 throw new SuperNotCalledException("View " + getClass().getSimpleName() + 13316 " did not call through to super.onCancelPendingInputEvents()"); 13317 } 13318 } 13319 13320 /** 13321 * Called as the result of a call to {@link #cancelPendingInputEvents()} on this view or 13322 * a parent view. 13323 * 13324 * <p>This method is responsible for removing any pending high-level input events that were 13325 * posted to the event queue to run later. Custom view classes that post their own deferred 13326 * high-level events via {@link #post(Runnable)}, {@link #postDelayed(Runnable, long)} or 13327 * {@link android.os.Handler} should override this method, call 13328 * <code>super.onCancelPendingInputEvents()</code> and remove those callbacks as appropriate. 13329 * </p> 13330 */ 13331 public void onCancelPendingInputEvents() { 13332 removePerformClickCallback(); 13333 cancelLongPress(); 13334 mPrivateFlags3 |= PFLAG3_CALLED_SUPER; 13335 } 13336 13337 /** 13338 * Store this view hierarchy's frozen state into the given container. 13339 * 13340 * @param container The SparseArray in which to save the view's state. 13341 * 13342 * @see #restoreHierarchyState(android.util.SparseArray) 13343 * @see #dispatchSaveInstanceState(android.util.SparseArray) 13344 * @see #onSaveInstanceState() 13345 */ 13346 public void saveHierarchyState(SparseArray<Parcelable> container) { 13347 dispatchSaveInstanceState(container); 13348 } 13349 13350 /** 13351 * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for 13352 * this view and its children. May be overridden to modify how freezing happens to a 13353 * view's children; for example, some views may want to not store state for their children. 13354 * 13355 * @param container The SparseArray in which to save the view's state. 13356 * 13357 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 13358 * @see #saveHierarchyState(android.util.SparseArray) 13359 * @see #onSaveInstanceState() 13360 */ 13361 protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { 13362 if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { 13363 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 13364 Parcelable state = onSaveInstanceState(); 13365 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 13366 throw new IllegalStateException( 13367 "Derived class did not call super.onSaveInstanceState()"); 13368 } 13369 if (state != null) { 13370 // Log.i("View", "Freezing #" + Integer.toHexString(mID) 13371 // + ": " + state); 13372 container.put(mID, state); 13373 } 13374 } 13375 } 13376 13377 /** 13378 * Hook allowing a view to generate a representation of its internal state 13379 * that can later be used to create a new instance with that same state. 13380 * This state should only contain information that is not persistent or can 13381 * not be reconstructed later. For example, you will never store your 13382 * current position on screen because that will be computed again when a 13383 * new instance of the view is placed in its view hierarchy. 13384 * <p> 13385 * Some examples of things you may store here: the current cursor position 13386 * in a text view (but usually not the text itself since that is stored in a 13387 * content provider or other persistent storage), the currently selected 13388 * item in a list view. 13389 * 13390 * @return Returns a Parcelable object containing the view's current dynamic 13391 * state, or null if there is nothing interesting to save. The 13392 * default implementation returns null. 13393 * @see #onRestoreInstanceState(android.os.Parcelable) 13394 * @see #saveHierarchyState(android.util.SparseArray) 13395 * @see #dispatchSaveInstanceState(android.util.SparseArray) 13396 * @see #setSaveEnabled(boolean) 13397 */ 13398 protected Parcelable onSaveInstanceState() { 13399 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 13400 return BaseSavedState.EMPTY_STATE; 13401 } 13402 13403 /** 13404 * Restore this view hierarchy's frozen state from the given container. 13405 * 13406 * @param container The SparseArray which holds previously frozen states. 13407 * 13408 * @see #saveHierarchyState(android.util.SparseArray) 13409 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 13410 * @see #onRestoreInstanceState(android.os.Parcelable) 13411 */ 13412 public void restoreHierarchyState(SparseArray<Parcelable> container) { 13413 dispatchRestoreInstanceState(container); 13414 } 13415 13416 /** 13417 * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the 13418 * state for this view and its children. May be overridden to modify how restoring 13419 * happens to a view's children; for example, some views may want to not store state 13420 * for their children. 13421 * 13422 * @param container The SparseArray which holds previously saved state. 13423 * 13424 * @see #dispatchSaveInstanceState(android.util.SparseArray) 13425 * @see #restoreHierarchyState(android.util.SparseArray) 13426 * @see #onRestoreInstanceState(android.os.Parcelable) 13427 */ 13428 protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { 13429 if (mID != NO_ID) { 13430 Parcelable state = container.get(mID); 13431 if (state != null) { 13432 // Log.i("View", "Restoreing #" + Integer.toHexString(mID) 13433 // + ": " + state); 13434 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 13435 onRestoreInstanceState(state); 13436 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 13437 throw new IllegalStateException( 13438 "Derived class did not call super.onRestoreInstanceState()"); 13439 } 13440 } 13441 } 13442 } 13443 13444 /** 13445 * Hook allowing a view to re-apply a representation of its internal state that had previously 13446 * been generated by {@link #onSaveInstanceState}. This function will never be called with a 13447 * null state. 13448 * 13449 * @param state The frozen state that had previously been returned by 13450 * {@link #onSaveInstanceState}. 13451 * 13452 * @see #onSaveInstanceState() 13453 * @see #restoreHierarchyState(android.util.SparseArray) 13454 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 13455 */ 13456 protected void onRestoreInstanceState(Parcelable state) { 13457 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 13458 if (state != BaseSavedState.EMPTY_STATE && state != null) { 13459 throw new IllegalArgumentException("Wrong state class, expecting View State but " 13460 + "received " + state.getClass().toString() + " instead. This usually happens " 13461 + "when two views of different type have the same id in the same hierarchy. " 13462 + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " 13463 + "other views do not use the same id."); 13464 } 13465 } 13466 13467 /** 13468 * <p>Return the time at which the drawing of the view hierarchy started.</p> 13469 * 13470 * @return the drawing start time in milliseconds 13471 */ 13472 public long getDrawingTime() { 13473 return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; 13474 } 13475 13476 /** 13477 * <p>Enables or disables the duplication of the parent's state into this view. When 13478 * duplication is enabled, this view gets its drawable state from its parent rather 13479 * than from its own internal properties.</p> 13480 * 13481 * <p>Note: in the current implementation, setting this property to true after the 13482 * view was added to a ViewGroup might have no effect at all. This property should 13483 * always be used from XML or set to true before adding this view to a ViewGroup.</p> 13484 * 13485 * <p>Note: if this view's parent addStateFromChildren property is enabled and this 13486 * property is enabled, an exception will be thrown.</p> 13487 * 13488 * <p>Note: if the child view uses and updates additionnal states which are unknown to the 13489 * parent, these states should not be affected by this method.</p> 13490 * 13491 * @param enabled True to enable duplication of the parent's drawable state, false 13492 * to disable it. 13493 * 13494 * @see #getDrawableState() 13495 * @see #isDuplicateParentStateEnabled() 13496 */ 13497 public void setDuplicateParentStateEnabled(boolean enabled) { 13498 setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); 13499 } 13500 13501 /** 13502 * <p>Indicates whether this duplicates its drawable state from its parent.</p> 13503 * 13504 * @return True if this view's drawable state is duplicated from the parent, 13505 * false otherwise 13506 * 13507 * @see #getDrawableState() 13508 * @see #setDuplicateParentStateEnabled(boolean) 13509 */ 13510 public boolean isDuplicateParentStateEnabled() { 13511 return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; 13512 } 13513 13514 /** 13515 * <p>Specifies the type of layer backing this view. The layer can be 13516 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 13517 * {@link #LAYER_TYPE_HARDWARE}.</p> 13518 * 13519 * <p>A layer is associated with an optional {@link android.graphics.Paint} 13520 * instance that controls how the layer is composed on screen. The following 13521 * properties of the paint are taken into account when composing the layer:</p> 13522 * <ul> 13523 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 13524 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 13525 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 13526 * </ul> 13527 * 13528 * <p>If this view has an alpha value set to < 1.0 by calling 13529 * {@link #setAlpha(float)}, the alpha value of the layer's paint is superceded 13530 * by this view's alpha value.</p> 13531 * 13532 * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE}, 13533 * {@link #LAYER_TYPE_SOFTWARE} and {@link #LAYER_TYPE_HARDWARE} 13534 * for more information on when and how to use layers.</p> 13535 * 13536 * @param layerType The type of layer to use with this view, must be one of 13537 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 13538 * {@link #LAYER_TYPE_HARDWARE} 13539 * @param paint The paint used to compose the layer. This argument is optional 13540 * and can be null. It is ignored when the layer type is 13541 * {@link #LAYER_TYPE_NONE} 13542 * 13543 * @see #getLayerType() 13544 * @see #LAYER_TYPE_NONE 13545 * @see #LAYER_TYPE_SOFTWARE 13546 * @see #LAYER_TYPE_HARDWARE 13547 * @see #setAlpha(float) 13548 * 13549 * @attr ref android.R.styleable#View_layerType 13550 */ 13551 public void setLayerType(int layerType, Paint paint) { 13552 if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { 13553 throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " 13554 + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); 13555 } 13556 13557 boolean typeChanged = mRenderNode.setLayerType(layerType); 13558 13559 if (!typeChanged) { 13560 setLayerPaint(paint); 13561 return; 13562 } 13563 13564 // Destroy any previous software drawing cache if needed 13565 if (mLayerType == LAYER_TYPE_SOFTWARE) { 13566 destroyDrawingCache(); 13567 } 13568 13569 mLayerType = layerType; 13570 final boolean layerDisabled = (mLayerType == LAYER_TYPE_NONE); 13571 mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); 13572 mRenderNode.setLayerPaint(mLayerPaint); 13573 13574 // draw() behaves differently if we are on a layer, so we need to 13575 // invalidate() here 13576 invalidateParentCaches(); 13577 invalidate(true); 13578 } 13579 13580 /** 13581 * Updates the {@link Paint} object used with the current layer (used only if the current 13582 * layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint 13583 * provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time 13584 * the View is redrawn, but {@link #setLayerPaint(android.graphics.Paint)} must be called to 13585 * ensure that the view gets redrawn immediately. 13586 * 13587 * <p>A layer is associated with an optional {@link android.graphics.Paint} 13588 * instance that controls how the layer is composed on screen. The following 13589 * properties of the paint are taken into account when composing the layer:</p> 13590 * <ul> 13591 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 13592 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 13593 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 13594 * </ul> 13595 * 13596 * <p>If this view has an alpha value set to < 1.0 by calling {@link #setAlpha(float)}, the 13597 * alpha value of the layer's paint is superceded by this view's alpha value.</p> 13598 * 13599 * @param paint The paint used to compose the layer. This argument is optional 13600 * and can be null. It is ignored when the layer type is 13601 * {@link #LAYER_TYPE_NONE} 13602 * 13603 * @see #setLayerType(int, android.graphics.Paint) 13604 */ 13605 public void setLayerPaint(Paint paint) { 13606 int layerType = getLayerType(); 13607 if (layerType != LAYER_TYPE_NONE) { 13608 mLayerPaint = paint == null ? new Paint() : paint; 13609 if (layerType == LAYER_TYPE_HARDWARE) { 13610 if (mRenderNode.setLayerPaint(mLayerPaint)) { 13611 invalidateViewProperty(false, false); 13612 } 13613 } else { 13614 invalidate(); 13615 } 13616 } 13617 } 13618 13619 /** 13620 * Indicates whether this view has a static layer. A view with layer type 13621 * {@link #LAYER_TYPE_NONE} is a static layer. Other types of layers are 13622 * dynamic. 13623 */ 13624 boolean hasStaticLayer() { 13625 return true; 13626 } 13627 13628 /** 13629 * Indicates what type of layer is currently associated with this view. By default 13630 * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. 13631 * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} 13632 * for more information on the different types of layers. 13633 * 13634 * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 13635 * {@link #LAYER_TYPE_HARDWARE} 13636 * 13637 * @see #setLayerType(int, android.graphics.Paint) 13638 * @see #buildLayer() 13639 * @see #LAYER_TYPE_NONE 13640 * @see #LAYER_TYPE_SOFTWARE 13641 * @see #LAYER_TYPE_HARDWARE 13642 */ 13643 public int getLayerType() { 13644 return mLayerType; 13645 } 13646 13647 /** 13648 * Forces this view's layer to be created and this view to be rendered 13649 * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, 13650 * invoking this method will have no effect. 13651 * 13652 * This method can for instance be used to render a view into its layer before 13653 * starting an animation. If this view is complex, rendering into the layer 13654 * before starting the animation will avoid skipping frames. 13655 * 13656 * @throws IllegalStateException If this view is not attached to a window 13657 * 13658 * @see #setLayerType(int, android.graphics.Paint) 13659 */ 13660 public void buildLayer() { 13661 if (mLayerType == LAYER_TYPE_NONE) return; 13662 13663 final AttachInfo attachInfo = mAttachInfo; 13664 if (attachInfo == null) { 13665 throw new IllegalStateException("This view must be attached to a window first"); 13666 } 13667 13668 if (getWidth() == 0 || getHeight() == 0) { 13669 return; 13670 } 13671 13672 switch (mLayerType) { 13673 case LAYER_TYPE_HARDWARE: 13674 updateDisplayListIfDirty(); 13675 if (attachInfo.mHardwareRenderer != null && mRenderNode.isValid()) { 13676 attachInfo.mHardwareRenderer.buildLayer(mRenderNode); 13677 } 13678 break; 13679 case LAYER_TYPE_SOFTWARE: 13680 buildDrawingCache(true); 13681 break; 13682 } 13683 } 13684 13685 /** 13686 * If this View draws with a HardwareLayer, returns it. 13687 * Otherwise returns null 13688 * 13689 * TODO: Only TextureView uses this, can we eliminate it? 13690 */ 13691 HardwareLayer getHardwareLayer() { 13692 return null; 13693 } 13694 13695 /** 13696 * Destroys all hardware rendering resources. This method is invoked 13697 * when the system needs to reclaim resources. Upon execution of this 13698 * method, you should free any OpenGL resources created by the view. 13699 * 13700 * Note: you <strong>must</strong> call 13701 * <code>super.destroyHardwareResources()</code> when overriding 13702 * this method. 13703 * 13704 * @hide 13705 */ 13706 protected void destroyHardwareResources() { 13707 // Although the Layer will be destroyed by RenderNode, we want to release 13708 // the staging display list, which is also a signal to RenderNode that it's 13709 // safe to free its copy of the display list as it knows that we will 13710 // push an updated DisplayList if we try to draw again 13711 resetDisplayList(); 13712 } 13713 13714 /** 13715 * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call 13716 * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a 13717 * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when 13718 * the cache is enabled. To benefit from the cache, you must request the drawing cache by 13719 * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not 13720 * null.</p> 13721 * 13722 * <p>Enabling the drawing cache is similar to 13723 * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware 13724 * acceleration is turned off. When hardware acceleration is turned on, enabling the 13725 * drawing cache has no effect on rendering because the system uses a different mechanism 13726 * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even 13727 * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} 13728 * for information on how to enable software and hardware layers.</p> 13729 * 13730 * <p>This API can be used to manually generate 13731 * a bitmap copy of this view, by setting the flag to <code>true</code> and calling 13732 * {@link #getDrawingCache()}.</p> 13733 * 13734 * @param enabled true to enable the drawing cache, false otherwise 13735 * 13736 * @see #isDrawingCacheEnabled() 13737 * @see #getDrawingCache() 13738 * @see #buildDrawingCache() 13739 * @see #setLayerType(int, android.graphics.Paint) 13740 */ 13741 public void setDrawingCacheEnabled(boolean enabled) { 13742 mCachingFailed = false; 13743 setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); 13744 } 13745 13746 /** 13747 * <p>Indicates whether the drawing cache is enabled for this view.</p> 13748 * 13749 * @return true if the drawing cache is enabled 13750 * 13751 * @see #setDrawingCacheEnabled(boolean) 13752 * @see #getDrawingCache() 13753 */ 13754 @ViewDebug.ExportedProperty(category = "drawing") 13755 public boolean isDrawingCacheEnabled() { 13756 return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; 13757 } 13758 13759 /** 13760 * Debugging utility which recursively outputs the dirty state of a view and its 13761 * descendants. 13762 * 13763 * @hide 13764 */ 13765 @SuppressWarnings({"UnusedDeclaration"}) 13766 public void outputDirtyFlags(String indent, boolean clear, int clearMask) { 13767 Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.PFLAG_DIRTY_MASK) + 13768 ") DRAWN(" + (mPrivateFlags & PFLAG_DRAWN) + ")" + " CACHE_VALID(" + 13769 (mPrivateFlags & View.PFLAG_DRAWING_CACHE_VALID) + 13770 ") INVALIDATED(" + (mPrivateFlags & PFLAG_INVALIDATED) + ")"); 13771 if (clear) { 13772 mPrivateFlags &= clearMask; 13773 } 13774 if (this instanceof ViewGroup) { 13775 ViewGroup parent = (ViewGroup) this; 13776 final int count = parent.getChildCount(); 13777 for (int i = 0; i < count; i++) { 13778 final View child = parent.getChildAt(i); 13779 child.outputDirtyFlags(indent + " ", clear, clearMask); 13780 } 13781 } 13782 } 13783 13784 /** 13785 * This method is used by ViewGroup to cause its children to restore or recreate their 13786 * display lists. It is called by getDisplayList() when the parent ViewGroup does not need 13787 * to recreate its own display list, which would happen if it went through the normal 13788 * draw/dispatchDraw mechanisms. 13789 * 13790 * @hide 13791 */ 13792 protected void dispatchGetDisplayList() {} 13793 13794 /** 13795 * A view that is not attached or hardware accelerated cannot create a display list. 13796 * This method checks these conditions and returns the appropriate result. 13797 * 13798 * @return true if view has the ability to create a display list, false otherwise. 13799 * 13800 * @hide 13801 */ 13802 public boolean canHaveDisplayList() { 13803 return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); 13804 } 13805 13806 private void updateDisplayListIfDirty() { 13807 final RenderNode renderNode = mRenderNode; 13808 if (!canHaveDisplayList()) { 13809 // can't populate RenderNode, don't try 13810 return; 13811 } 13812 13813 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 13814 || !renderNode.isValid() 13815 || (mRecreateDisplayList)) { 13816 // Don't need to recreate the display list, just need to tell our 13817 // children to restore/recreate theirs 13818 if (renderNode.isValid() 13819 && !mRecreateDisplayList) { 13820 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 13821 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13822 dispatchGetDisplayList(); 13823 13824 return; // no work needed 13825 } 13826 13827 // If we got here, we're recreating it. Mark it as such to ensure that 13828 // we copy in child display lists into ours in drawChild() 13829 mRecreateDisplayList = true; 13830 13831 int width = mRight - mLeft; 13832 int height = mBottom - mTop; 13833 int layerType = getLayerType(); 13834 13835 final HardwareCanvas canvas = renderNode.start(width, height); 13836 canvas.setHighContrastText(mAttachInfo.mHighContrastText); 13837 13838 try { 13839 final HardwareLayer layer = getHardwareLayer(); 13840 if (layer != null && layer.isValid()) { 13841 canvas.drawHardwareLayer(layer, 0, 0, mLayerPaint); 13842 } else if (layerType == LAYER_TYPE_SOFTWARE) { 13843 buildDrawingCache(true); 13844 Bitmap cache = getDrawingCache(true); 13845 if (cache != null) { 13846 canvas.drawBitmap(cache, 0, 0, mLayerPaint); 13847 } 13848 } else { 13849 computeScroll(); 13850 13851 canvas.translate(-mScrollX, -mScrollY); 13852 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 13853 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13854 13855 // Fast path for layouts with no backgrounds 13856 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 13857 dispatchDraw(canvas); 13858 if (mOverlay != null && !mOverlay.isEmpty()) { 13859 mOverlay.getOverlayView().draw(canvas); 13860 } 13861 } else { 13862 draw(canvas); 13863 } 13864 drawAccessibilityFocus(canvas); 13865 } 13866 } finally { 13867 renderNode.end(canvas); 13868 setDisplayListProperties(renderNode); 13869 } 13870 } else { 13871 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 13872 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13873 } 13874 } 13875 13876 /** 13877 * Returns a RenderNode with View draw content recorded, which can be 13878 * used to draw this view again without executing its draw method. 13879 * 13880 * @return A RenderNode ready to replay, or null if caching is not enabled. 13881 * 13882 * @hide 13883 */ 13884 public RenderNode getDisplayList() { 13885 updateDisplayListIfDirty(); 13886 return mRenderNode; 13887 } 13888 13889 private void resetDisplayList() { 13890 if (mRenderNode.isValid()) { 13891 mRenderNode.destroyDisplayListData(); 13892 } 13893 13894 if (mBackgroundRenderNode != null && mBackgroundRenderNode.isValid()) { 13895 mBackgroundRenderNode.destroyDisplayListData(); 13896 } 13897 } 13898 13899 /** 13900 * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> 13901 * 13902 * @return A non-scaled bitmap representing this view or null if cache is disabled. 13903 * 13904 * @see #getDrawingCache(boolean) 13905 */ 13906 public Bitmap getDrawingCache() { 13907 return getDrawingCache(false); 13908 } 13909 13910 /** 13911 * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap 13912 * is null when caching is disabled. If caching is enabled and the cache is not ready, 13913 * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not 13914 * draw from the cache when the cache is enabled. To benefit from the cache, you must 13915 * request the drawing cache by calling this method and draw it on screen if the 13916 * returned bitmap is not null.</p> 13917 * 13918 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 13919 * this method will create a bitmap of the same size as this view. Because this bitmap 13920 * will be drawn scaled by the parent ViewGroup, the result on screen might show 13921 * scaling artifacts. To avoid such artifacts, you should call this method by setting 13922 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 13923 * size than the view. This implies that your application must be able to handle this 13924 * size.</p> 13925 * 13926 * @param autoScale Indicates whether the generated bitmap should be scaled based on 13927 * the current density of the screen when the application is in compatibility 13928 * mode. 13929 * 13930 * @return A bitmap representing this view or null if cache is disabled. 13931 * 13932 * @see #setDrawingCacheEnabled(boolean) 13933 * @see #isDrawingCacheEnabled() 13934 * @see #buildDrawingCache(boolean) 13935 * @see #destroyDrawingCache() 13936 */ 13937 public Bitmap getDrawingCache(boolean autoScale) { 13938 if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { 13939 return null; 13940 } 13941 if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { 13942 buildDrawingCache(autoScale); 13943 } 13944 return autoScale ? mDrawingCache : mUnscaledDrawingCache; 13945 } 13946 13947 /** 13948 * <p>Frees the resources used by the drawing cache. If you call 13949 * {@link #buildDrawingCache()} manually without calling 13950 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 13951 * should cleanup the cache with this method afterwards.</p> 13952 * 13953 * @see #setDrawingCacheEnabled(boolean) 13954 * @see #buildDrawingCache() 13955 * @see #getDrawingCache() 13956 */ 13957 public void destroyDrawingCache() { 13958 if (mDrawingCache != null) { 13959 mDrawingCache.recycle(); 13960 mDrawingCache = null; 13961 } 13962 if (mUnscaledDrawingCache != null) { 13963 mUnscaledDrawingCache.recycle(); 13964 mUnscaledDrawingCache = null; 13965 } 13966 } 13967 13968 /** 13969 * Setting a solid background color for the drawing cache's bitmaps will improve 13970 * performance and memory usage. Note, though that this should only be used if this 13971 * view will always be drawn on top of a solid color. 13972 * 13973 * @param color The background color to use for the drawing cache's bitmap 13974 * 13975 * @see #setDrawingCacheEnabled(boolean) 13976 * @see #buildDrawingCache() 13977 * @see #getDrawingCache() 13978 */ 13979 public void setDrawingCacheBackgroundColor(int color) { 13980 if (color != mDrawingCacheBackgroundColor) { 13981 mDrawingCacheBackgroundColor = color; 13982 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 13983 } 13984 } 13985 13986 /** 13987 * @see #setDrawingCacheBackgroundColor(int) 13988 * 13989 * @return The background color to used for the drawing cache's bitmap 13990 */ 13991 public int getDrawingCacheBackgroundColor() { 13992 return mDrawingCacheBackgroundColor; 13993 } 13994 13995 /** 13996 * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> 13997 * 13998 * @see #buildDrawingCache(boolean) 13999 */ 14000 public void buildDrawingCache() { 14001 buildDrawingCache(false); 14002 } 14003 14004 /** 14005 * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> 14006 * 14007 * <p>If you call {@link #buildDrawingCache()} manually without calling 14008 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 14009 * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> 14010 * 14011 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 14012 * this method will create a bitmap of the same size as this view. Because this bitmap 14013 * will be drawn scaled by the parent ViewGroup, the result on screen might show 14014 * scaling artifacts. To avoid such artifacts, you should call this method by setting 14015 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 14016 * size than the view. This implies that your application must be able to handle this 14017 * size.</p> 14018 * 14019 * <p>You should avoid calling this method when hardware acceleration is enabled. If 14020 * you do not need the drawing cache bitmap, calling this method will increase memory 14021 * usage and cause the view to be rendered in software once, thus negatively impacting 14022 * performance.</p> 14023 * 14024 * @see #getDrawingCache() 14025 * @see #destroyDrawingCache() 14026 */ 14027 public void buildDrawingCache(boolean autoScale) { 14028 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || (autoScale ? 14029 mDrawingCache == null : mUnscaledDrawingCache == null)) { 14030 mCachingFailed = false; 14031 14032 int width = mRight - mLeft; 14033 int height = mBottom - mTop; 14034 14035 final AttachInfo attachInfo = mAttachInfo; 14036 final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; 14037 14038 if (autoScale && scalingRequired) { 14039 width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); 14040 height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); 14041 } 14042 14043 final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; 14044 final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); 14045 final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; 14046 14047 final long projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4); 14048 final long drawingCacheSize = 14049 ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize(); 14050 if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) { 14051 if (width > 0 && height > 0) { 14052 Log.w(VIEW_LOG_TAG, "View too large to fit into drawing cache, needs " 14053 + projectedBitmapSize + " bytes, only " 14054 + drawingCacheSize + " available"); 14055 } 14056 destroyDrawingCache(); 14057 mCachingFailed = true; 14058 return; 14059 } 14060 14061 boolean clear = true; 14062 Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; 14063 14064 if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { 14065 Bitmap.Config quality; 14066 if (!opaque) { 14067 // Never pick ARGB_4444 because it looks awful 14068 // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case 14069 switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { 14070 case DRAWING_CACHE_QUALITY_AUTO: 14071 case DRAWING_CACHE_QUALITY_LOW: 14072 case DRAWING_CACHE_QUALITY_HIGH: 14073 default: 14074 quality = Bitmap.Config.ARGB_8888; 14075 break; 14076 } 14077 } else { 14078 // Optimization for translucent windows 14079 // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() 14080 quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 14081 } 14082 14083 // Try to cleanup memory 14084 if (bitmap != null) bitmap.recycle(); 14085 14086 try { 14087 bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 14088 width, height, quality); 14089 bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); 14090 if (autoScale) { 14091 mDrawingCache = bitmap; 14092 } else { 14093 mUnscaledDrawingCache = bitmap; 14094 } 14095 if (opaque && use32BitCache) bitmap.setHasAlpha(false); 14096 } catch (OutOfMemoryError e) { 14097 // If there is not enough memory to create the bitmap cache, just 14098 // ignore the issue as bitmap caches are not required to draw the 14099 // view hierarchy 14100 if (autoScale) { 14101 mDrawingCache = null; 14102 } else { 14103 mUnscaledDrawingCache = null; 14104 } 14105 mCachingFailed = true; 14106 return; 14107 } 14108 14109 clear = drawingCacheBackgroundColor != 0; 14110 } 14111 14112 Canvas canvas; 14113 if (attachInfo != null) { 14114 canvas = attachInfo.mCanvas; 14115 if (canvas == null) { 14116 canvas = new Canvas(); 14117 } 14118 canvas.setBitmap(bitmap); 14119 // Temporarily clobber the cached Canvas in case one of our children 14120 // is also using a drawing cache. Without this, the children would 14121 // steal the canvas by attaching their own bitmap to it and bad, bad 14122 // thing would happen (invisible views, corrupted drawings, etc.) 14123 attachInfo.mCanvas = null; 14124 } else { 14125 // This case should hopefully never or seldom happen 14126 canvas = new Canvas(bitmap); 14127 } 14128 14129 if (clear) { 14130 bitmap.eraseColor(drawingCacheBackgroundColor); 14131 } 14132 14133 computeScroll(); 14134 final int restoreCount = canvas.save(); 14135 14136 if (autoScale && scalingRequired) { 14137 final float scale = attachInfo.mApplicationScale; 14138 canvas.scale(scale, scale); 14139 } 14140 14141 canvas.translate(-mScrollX, -mScrollY); 14142 14143 mPrivateFlags |= PFLAG_DRAWN; 14144 if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || 14145 mLayerType != LAYER_TYPE_NONE) { 14146 mPrivateFlags |= PFLAG_DRAWING_CACHE_VALID; 14147 } 14148 14149 // Fast path for layouts with no backgrounds 14150 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 14151 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14152 dispatchDraw(canvas); 14153 if (mOverlay != null && !mOverlay.isEmpty()) { 14154 mOverlay.getOverlayView().draw(canvas); 14155 } 14156 } else { 14157 draw(canvas); 14158 } 14159 drawAccessibilityFocus(canvas); 14160 14161 canvas.restoreToCount(restoreCount); 14162 canvas.setBitmap(null); 14163 14164 if (attachInfo != null) { 14165 // Restore the cached Canvas for our siblings 14166 attachInfo.mCanvas = canvas; 14167 } 14168 } 14169 } 14170 14171 /** 14172 * Create a snapshot of the view into a bitmap. We should probably make 14173 * some form of this public, but should think about the API. 14174 */ 14175 Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { 14176 int width = mRight - mLeft; 14177 int height = mBottom - mTop; 14178 14179 final AttachInfo attachInfo = mAttachInfo; 14180 final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; 14181 width = (int) ((width * scale) + 0.5f); 14182 height = (int) ((height * scale) + 0.5f); 14183 14184 Bitmap bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 14185 width > 0 ? width : 1, height > 0 ? height : 1, quality); 14186 if (bitmap == null) { 14187 throw new OutOfMemoryError(); 14188 } 14189 14190 Resources resources = getResources(); 14191 if (resources != null) { 14192 bitmap.setDensity(resources.getDisplayMetrics().densityDpi); 14193 } 14194 14195 Canvas canvas; 14196 if (attachInfo != null) { 14197 canvas = attachInfo.mCanvas; 14198 if (canvas == null) { 14199 canvas = new Canvas(); 14200 } 14201 canvas.setBitmap(bitmap); 14202 // Temporarily clobber the cached Canvas in case one of our children 14203 // is also using a drawing cache. Without this, the children would 14204 // steal the canvas by attaching their own bitmap to it and bad, bad 14205 // things would happen (invisible views, corrupted drawings, etc.) 14206 attachInfo.mCanvas = null; 14207 } else { 14208 // This case should hopefully never or seldom happen 14209 canvas = new Canvas(bitmap); 14210 } 14211 14212 if ((backgroundColor & 0xff000000) != 0) { 14213 bitmap.eraseColor(backgroundColor); 14214 } 14215 14216 computeScroll(); 14217 final int restoreCount = canvas.save(); 14218 canvas.scale(scale, scale); 14219 canvas.translate(-mScrollX, -mScrollY); 14220 14221 // Temporarily remove the dirty mask 14222 int flags = mPrivateFlags; 14223 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14224 14225 // Fast path for layouts with no backgrounds 14226 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 14227 dispatchDraw(canvas); 14228 if (mOverlay != null && !mOverlay.isEmpty()) { 14229 mOverlay.getOverlayView().draw(canvas); 14230 } 14231 } else { 14232 draw(canvas); 14233 } 14234 drawAccessibilityFocus(canvas); 14235 14236 mPrivateFlags = flags; 14237 14238 canvas.restoreToCount(restoreCount); 14239 canvas.setBitmap(null); 14240 14241 if (attachInfo != null) { 14242 // Restore the cached Canvas for our siblings 14243 attachInfo.mCanvas = canvas; 14244 } 14245 14246 return bitmap; 14247 } 14248 14249 /** 14250 * Indicates whether this View is currently in edit mode. A View is usually 14251 * in edit mode when displayed within a developer tool. For instance, if 14252 * this View is being drawn by a visual user interface builder, this method 14253 * should return true. 14254 * 14255 * Subclasses should check the return value of this method to provide 14256 * different behaviors if their normal behavior might interfere with the 14257 * host environment. For instance: the class spawns a thread in its 14258 * constructor, the drawing code relies on device-specific features, etc. 14259 * 14260 * This method is usually checked in the drawing code of custom widgets. 14261 * 14262 * @return True if this View is in edit mode, false otherwise. 14263 */ 14264 public boolean isInEditMode() { 14265 return false; 14266 } 14267 14268 /** 14269 * If the View draws content inside its padding and enables fading edges, 14270 * it needs to support padding offsets. Padding offsets are added to the 14271 * fading edges to extend the length of the fade so that it covers pixels 14272 * drawn inside the padding. 14273 * 14274 * Subclasses of this class should override this method if they need 14275 * to draw content inside the padding. 14276 * 14277 * @return True if padding offset must be applied, false otherwise. 14278 * 14279 * @see #getLeftPaddingOffset() 14280 * @see #getRightPaddingOffset() 14281 * @see #getTopPaddingOffset() 14282 * @see #getBottomPaddingOffset() 14283 * 14284 * @since CURRENT 14285 */ 14286 protected boolean isPaddingOffsetRequired() { 14287 return false; 14288 } 14289 14290 /** 14291 * Amount by which to extend the left fading region. Called only when 14292 * {@link #isPaddingOffsetRequired()} returns true. 14293 * 14294 * @return The left padding offset in pixels. 14295 * 14296 * @see #isPaddingOffsetRequired() 14297 * 14298 * @since CURRENT 14299 */ 14300 protected int getLeftPaddingOffset() { 14301 return 0; 14302 } 14303 14304 /** 14305 * Amount by which to extend the right fading region. Called only when 14306 * {@link #isPaddingOffsetRequired()} returns true. 14307 * 14308 * @return The right padding offset in pixels. 14309 * 14310 * @see #isPaddingOffsetRequired() 14311 * 14312 * @since CURRENT 14313 */ 14314 protected int getRightPaddingOffset() { 14315 return 0; 14316 } 14317 14318 /** 14319 * Amount by which to extend the top fading region. Called only when 14320 * {@link #isPaddingOffsetRequired()} returns true. 14321 * 14322 * @return The top padding offset in pixels. 14323 * 14324 * @see #isPaddingOffsetRequired() 14325 * 14326 * @since CURRENT 14327 */ 14328 protected int getTopPaddingOffset() { 14329 return 0; 14330 } 14331 14332 /** 14333 * Amount by which to extend the bottom fading region. Called only when 14334 * {@link #isPaddingOffsetRequired()} returns true. 14335 * 14336 * @return The bottom padding offset in pixels. 14337 * 14338 * @see #isPaddingOffsetRequired() 14339 * 14340 * @since CURRENT 14341 */ 14342 protected int getBottomPaddingOffset() { 14343 return 0; 14344 } 14345 14346 /** 14347 * @hide 14348 * @param offsetRequired 14349 */ 14350 protected int getFadeTop(boolean offsetRequired) { 14351 int top = mPaddingTop; 14352 if (offsetRequired) top += getTopPaddingOffset(); 14353 return top; 14354 } 14355 14356 /** 14357 * @hide 14358 * @param offsetRequired 14359 */ 14360 protected int getFadeHeight(boolean offsetRequired) { 14361 int padding = mPaddingTop; 14362 if (offsetRequired) padding += getTopPaddingOffset(); 14363 return mBottom - mTop - mPaddingBottom - padding; 14364 } 14365 14366 /** 14367 * <p>Indicates whether this view is attached to a hardware accelerated 14368 * window or not.</p> 14369 * 14370 * <p>Even if this method returns true, it does not mean that every call 14371 * to {@link #draw(android.graphics.Canvas)} will be made with an hardware 14372 * accelerated {@link android.graphics.Canvas}. For instance, if this view 14373 * is drawn onto an offscreen {@link android.graphics.Bitmap} and its 14374 * window is hardware accelerated, 14375 * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely 14376 * return false, and this method will return true.</p> 14377 * 14378 * @return True if the view is attached to a window and the window is 14379 * hardware accelerated; false in any other case. 14380 */ 14381 @ViewDebug.ExportedProperty(category = "drawing") 14382 public boolean isHardwareAccelerated() { 14383 return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 14384 } 14385 14386 /** 14387 * Sets a rectangular area on this view to which the view will be clipped 14388 * when it is drawn. Setting the value to null will remove the clip bounds 14389 * and the view will draw normally, using its full bounds. 14390 * 14391 * @param clipBounds The rectangular area, in the local coordinates of 14392 * this view, to which future drawing operations will be clipped. 14393 */ 14394 public void setClipBounds(Rect clipBounds) { 14395 if (clipBounds != null) { 14396 if (clipBounds.equals(mClipBounds)) { 14397 return; 14398 } 14399 if (mClipBounds == null) { 14400 invalidate(); 14401 mClipBounds = new Rect(clipBounds); 14402 } else { 14403 invalidate(Math.min(mClipBounds.left, clipBounds.left), 14404 Math.min(mClipBounds.top, clipBounds.top), 14405 Math.max(mClipBounds.right, clipBounds.right), 14406 Math.max(mClipBounds.bottom, clipBounds.bottom)); 14407 mClipBounds.set(clipBounds); 14408 } 14409 } else { 14410 if (mClipBounds != null) { 14411 invalidate(); 14412 mClipBounds = null; 14413 } 14414 } 14415 mRenderNode.setClipBounds(mClipBounds); 14416 } 14417 14418 /** 14419 * Returns a copy of the current {@link #setClipBounds(Rect) clipBounds}. 14420 * 14421 * @return A copy of the current clip bounds if clip bounds are set, 14422 * otherwise null. 14423 */ 14424 public Rect getClipBounds() { 14425 return (mClipBounds != null) ? new Rect(mClipBounds) : null; 14426 } 14427 14428 /** 14429 * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common 14430 * case of an active Animation being run on the view. 14431 */ 14432 private boolean drawAnimation(ViewGroup parent, long drawingTime, 14433 Animation a, boolean scalingRequired) { 14434 Transformation invalidationTransform; 14435 final int flags = parent.mGroupFlags; 14436 final boolean initialized = a.isInitialized(); 14437 if (!initialized) { 14438 a.initialize(mRight - mLeft, mBottom - mTop, parent.getWidth(), parent.getHeight()); 14439 a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); 14440 if (mAttachInfo != null) a.setListenerHandler(mAttachInfo.mHandler); 14441 onAnimationStart(); 14442 } 14443 14444 final Transformation t = parent.getChildTransformation(); 14445 boolean more = a.getTransformation(drawingTime, t, 1f); 14446 if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { 14447 if (parent.mInvalidationTransformation == null) { 14448 parent.mInvalidationTransformation = new Transformation(); 14449 } 14450 invalidationTransform = parent.mInvalidationTransformation; 14451 a.getTransformation(drawingTime, invalidationTransform, 1f); 14452 } else { 14453 invalidationTransform = t; 14454 } 14455 14456 if (more) { 14457 if (!a.willChangeBounds()) { 14458 if ((flags & (ViewGroup.FLAG_OPTIMIZE_INVALIDATE | ViewGroup.FLAG_ANIMATION_DONE)) == 14459 ViewGroup.FLAG_OPTIMIZE_INVALIDATE) { 14460 parent.mGroupFlags |= ViewGroup.FLAG_INVALIDATE_REQUIRED; 14461 } else if ((flags & ViewGroup.FLAG_INVALIDATE_REQUIRED) == 0) { 14462 // The child need to draw an animation, potentially offscreen, so 14463 // make sure we do not cancel invalidate requests 14464 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 14465 parent.invalidate(mLeft, mTop, mRight, mBottom); 14466 } 14467 } else { 14468 if (parent.mInvalidateRegion == null) { 14469 parent.mInvalidateRegion = new RectF(); 14470 } 14471 final RectF region = parent.mInvalidateRegion; 14472 a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, 14473 invalidationTransform); 14474 14475 // The child need to draw an animation, potentially offscreen, so 14476 // make sure we do not cancel invalidate requests 14477 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 14478 14479 final int left = mLeft + (int) region.left; 14480 final int top = mTop + (int) region.top; 14481 parent.invalidate(left, top, left + (int) (region.width() + .5f), 14482 top + (int) (region.height() + .5f)); 14483 } 14484 } 14485 return more; 14486 } 14487 14488 /** 14489 * This method is called by getDisplayList() when a display list is recorded for a View. 14490 * It pushes any properties to the RenderNode that aren't managed by the RenderNode. 14491 */ 14492 void setDisplayListProperties(RenderNode renderNode) { 14493 if (renderNode != null) { 14494 renderNode.setHasOverlappingRendering(hasOverlappingRendering()); 14495 if (mParent instanceof ViewGroup) { 14496 renderNode.setClipToBounds( 14497 (((ViewGroup) mParent).mGroupFlags & ViewGroup.FLAG_CLIP_CHILDREN) != 0); 14498 } 14499 float alpha = 1; 14500 if (mParent instanceof ViewGroup && (((ViewGroup) mParent).mGroupFlags & 14501 ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 14502 ViewGroup parentVG = (ViewGroup) mParent; 14503 final Transformation t = parentVG.getChildTransformation(); 14504 if (parentVG.getChildStaticTransformation(this, t)) { 14505 final int transformType = t.getTransformationType(); 14506 if (transformType != Transformation.TYPE_IDENTITY) { 14507 if ((transformType & Transformation.TYPE_ALPHA) != 0) { 14508 alpha = t.getAlpha(); 14509 } 14510 if ((transformType & Transformation.TYPE_MATRIX) != 0) { 14511 renderNode.setStaticMatrix(t.getMatrix()); 14512 } 14513 } 14514 } 14515 } 14516 if (mTransformationInfo != null) { 14517 alpha *= getFinalAlpha(); 14518 if (alpha < 1) { 14519 final int multipliedAlpha = (int) (255 * alpha); 14520 if (onSetAlpha(multipliedAlpha)) { 14521 alpha = 1; 14522 } 14523 } 14524 renderNode.setAlpha(alpha); 14525 } else if (alpha < 1) { 14526 renderNode.setAlpha(alpha); 14527 } 14528 } 14529 } 14530 14531 /** 14532 * This method is called by ViewGroup.drawChild() to have each child view draw itself. 14533 * This draw() method is an implementation detail and is not intended to be overridden or 14534 * to be called from anywhere else other than ViewGroup.drawChild(). 14535 */ 14536 boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { 14537 boolean usingRenderNodeProperties = mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 14538 boolean more = false; 14539 final boolean childHasIdentityMatrix = hasIdentityMatrix(); 14540 final int flags = parent.mGroupFlags; 14541 14542 if ((flags & ViewGroup.FLAG_CLEAR_TRANSFORMATION) == ViewGroup.FLAG_CLEAR_TRANSFORMATION) { 14543 parent.getChildTransformation().clear(); 14544 parent.mGroupFlags &= ~ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14545 } 14546 14547 Transformation transformToApply = null; 14548 boolean concatMatrix = false; 14549 14550 boolean scalingRequired = false; 14551 boolean caching; 14552 int layerType = getLayerType(); 14553 14554 final boolean hardwareAccelerated = canvas.isHardwareAccelerated(); 14555 if ((flags & ViewGroup.FLAG_CHILDREN_DRAWN_WITH_CACHE) != 0 || 14556 (flags & ViewGroup.FLAG_ALWAYS_DRAWN_WITH_CACHE) != 0) { 14557 caching = true; 14558 // Auto-scaled apps are not hw-accelerated, no need to set scaling flag on DisplayList 14559 if (mAttachInfo != null) scalingRequired = mAttachInfo.mScalingRequired; 14560 } else { 14561 caching = (layerType != LAYER_TYPE_NONE) || hardwareAccelerated; 14562 } 14563 14564 final Animation a = getAnimation(); 14565 if (a != null) { 14566 more = drawAnimation(parent, drawingTime, a, scalingRequired); 14567 concatMatrix = a.willChangeTransformationMatrix(); 14568 if (concatMatrix) { 14569 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 14570 } 14571 transformToApply = parent.getChildTransformation(); 14572 } else { 14573 if ((mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_TRANSFORM) != 0) { 14574 // No longer animating: clear out old animation matrix 14575 mRenderNode.setAnimationMatrix(null); 14576 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 14577 } 14578 if (!usingRenderNodeProperties && 14579 (flags & ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 14580 final Transformation t = parent.getChildTransformation(); 14581 final boolean hasTransform = parent.getChildStaticTransformation(this, t); 14582 if (hasTransform) { 14583 final int transformType = t.getTransformationType(); 14584 transformToApply = transformType != Transformation.TYPE_IDENTITY ? t : null; 14585 concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; 14586 } 14587 } 14588 } 14589 14590 concatMatrix |= !childHasIdentityMatrix; 14591 14592 // Sets the flag as early as possible to allow draw() implementations 14593 // to call invalidate() successfully when doing animations 14594 mPrivateFlags |= PFLAG_DRAWN; 14595 14596 if (!concatMatrix && 14597 (flags & (ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS | 14598 ViewGroup.FLAG_CLIP_CHILDREN)) == ViewGroup.FLAG_CLIP_CHILDREN && 14599 canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && 14600 (mPrivateFlags & PFLAG_DRAW_ANIMATION) == 0) { 14601 mPrivateFlags2 |= PFLAG2_VIEW_QUICK_REJECTED; 14602 return more; 14603 } 14604 mPrivateFlags2 &= ~PFLAG2_VIEW_QUICK_REJECTED; 14605 14606 if (hardwareAccelerated) { 14607 // Clear INVALIDATED flag to allow invalidation to occur during rendering, but 14608 // retain the flag's value temporarily in the mRecreateDisplayList flag 14609 mRecreateDisplayList = (mPrivateFlags & PFLAG_INVALIDATED) == PFLAG_INVALIDATED; 14610 mPrivateFlags &= ~PFLAG_INVALIDATED; 14611 } 14612 14613 RenderNode renderNode = null; 14614 Bitmap cache = null; 14615 boolean hasDisplayList = false; 14616 if (caching) { 14617 if (!hardwareAccelerated) { 14618 if (layerType != LAYER_TYPE_NONE) { 14619 layerType = LAYER_TYPE_SOFTWARE; 14620 buildDrawingCache(true); 14621 } 14622 cache = getDrawingCache(true); 14623 } else { 14624 switch (layerType) { 14625 case LAYER_TYPE_SOFTWARE: 14626 if (usingRenderNodeProperties) { 14627 hasDisplayList = canHaveDisplayList(); 14628 } else { 14629 buildDrawingCache(true); 14630 cache = getDrawingCache(true); 14631 } 14632 break; 14633 case LAYER_TYPE_HARDWARE: 14634 if (usingRenderNodeProperties) { 14635 hasDisplayList = canHaveDisplayList(); 14636 } 14637 break; 14638 case LAYER_TYPE_NONE: 14639 // Delay getting the display list until animation-driven alpha values are 14640 // set up and possibly passed on to the view 14641 hasDisplayList = canHaveDisplayList(); 14642 break; 14643 } 14644 } 14645 } 14646 usingRenderNodeProperties &= hasDisplayList; 14647 if (usingRenderNodeProperties) { 14648 renderNode = getDisplayList(); 14649 if (!renderNode.isValid()) { 14650 // Uncommon, but possible. If a view is removed from the hierarchy during the call 14651 // to getDisplayList(), the display list will be marked invalid and we should not 14652 // try to use it again. 14653 renderNode = null; 14654 hasDisplayList = false; 14655 usingRenderNodeProperties = false; 14656 } 14657 } 14658 14659 int sx = 0; 14660 int sy = 0; 14661 if (!hasDisplayList) { 14662 computeScroll(); 14663 sx = mScrollX; 14664 sy = mScrollY; 14665 } 14666 14667 final boolean hasNoCache = cache == null || hasDisplayList; 14668 final boolean offsetForScroll = cache == null && !hasDisplayList && 14669 layerType != LAYER_TYPE_HARDWARE; 14670 14671 int restoreTo = -1; 14672 if (!usingRenderNodeProperties || transformToApply != null) { 14673 restoreTo = canvas.save(); 14674 } 14675 if (offsetForScroll) { 14676 canvas.translate(mLeft - sx, mTop - sy); 14677 } else { 14678 if (!usingRenderNodeProperties) { 14679 canvas.translate(mLeft, mTop); 14680 } 14681 if (scalingRequired) { 14682 if (usingRenderNodeProperties) { 14683 // TODO: Might not need this if we put everything inside the DL 14684 restoreTo = canvas.save(); 14685 } 14686 // mAttachInfo cannot be null, otherwise scalingRequired == false 14687 final float scale = 1.0f / mAttachInfo.mApplicationScale; 14688 canvas.scale(scale, scale); 14689 } 14690 } 14691 14692 float alpha = usingRenderNodeProperties ? 1 : (getAlpha() * getTransitionAlpha()); 14693 if (transformToApply != null || alpha < 1 || !hasIdentityMatrix() || 14694 (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) == PFLAG3_VIEW_IS_ANIMATING_ALPHA) { 14695 if (transformToApply != null || !childHasIdentityMatrix) { 14696 int transX = 0; 14697 int transY = 0; 14698 14699 if (offsetForScroll) { 14700 transX = -sx; 14701 transY = -sy; 14702 } 14703 14704 if (transformToApply != null) { 14705 if (concatMatrix) { 14706 if (usingRenderNodeProperties) { 14707 renderNode.setAnimationMatrix(transformToApply.getMatrix()); 14708 } else { 14709 // Undo the scroll translation, apply the transformation matrix, 14710 // then redo the scroll translate to get the correct result. 14711 canvas.translate(-transX, -transY); 14712 canvas.concat(transformToApply.getMatrix()); 14713 canvas.translate(transX, transY); 14714 } 14715 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14716 } 14717 14718 float transformAlpha = transformToApply.getAlpha(); 14719 if (transformAlpha < 1) { 14720 alpha *= transformAlpha; 14721 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14722 } 14723 } 14724 14725 if (!childHasIdentityMatrix && !usingRenderNodeProperties) { 14726 canvas.translate(-transX, -transY); 14727 canvas.concat(getMatrix()); 14728 canvas.translate(transX, transY); 14729 } 14730 } 14731 14732 // Deal with alpha if it is or used to be <1 14733 if (alpha < 1 || 14734 (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) == PFLAG3_VIEW_IS_ANIMATING_ALPHA) { 14735 if (alpha < 1) { 14736 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_ALPHA; 14737 } else { 14738 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_ALPHA; 14739 } 14740 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14741 if (hasNoCache) { 14742 final int multipliedAlpha = (int) (255 * alpha); 14743 if (!onSetAlpha(multipliedAlpha)) { 14744 int layerFlags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 14745 if ((flags & ViewGroup.FLAG_CLIP_CHILDREN) != 0 || 14746 layerType != LAYER_TYPE_NONE) { 14747 layerFlags |= Canvas.CLIP_TO_LAYER_SAVE_FLAG; 14748 } 14749 if (usingRenderNodeProperties) { 14750 renderNode.setAlpha(alpha * getAlpha() * getTransitionAlpha()); 14751 } else if (layerType == LAYER_TYPE_NONE) { 14752 final int scrollX = hasDisplayList ? 0 : sx; 14753 final int scrollY = hasDisplayList ? 0 : sy; 14754 canvas.saveLayerAlpha(scrollX, scrollY, 14755 scrollX + (mRight - mLeft), scrollY + (mBottom - mTop), 14756 multipliedAlpha, layerFlags); 14757 } 14758 } else { 14759 // Alpha is handled by the child directly, clobber the layer's alpha 14760 mPrivateFlags |= PFLAG_ALPHA_SET; 14761 } 14762 } 14763 } 14764 } else if ((mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 14765 onSetAlpha(255); 14766 mPrivateFlags &= ~PFLAG_ALPHA_SET; 14767 } 14768 14769 if (!usingRenderNodeProperties) { 14770 // apply clips directly, since RenderNode won't do it for this draw 14771 if ((flags & ViewGroup.FLAG_CLIP_CHILDREN) == ViewGroup.FLAG_CLIP_CHILDREN 14772 && cache == null) { 14773 if (offsetForScroll) { 14774 canvas.clipRect(sx, sy, sx + (mRight - mLeft), sy + (mBottom - mTop)); 14775 } else { 14776 if (!scalingRequired || cache == null) { 14777 canvas.clipRect(0, 0, mRight - mLeft, mBottom - mTop); 14778 } else { 14779 canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); 14780 } 14781 } 14782 } 14783 14784 if (mClipBounds != null) { 14785 // clip bounds ignore scroll 14786 canvas.clipRect(mClipBounds); 14787 } 14788 } 14789 14790 14791 14792 if (!usingRenderNodeProperties && hasDisplayList) { 14793 renderNode = getDisplayList(); 14794 if (!renderNode.isValid()) { 14795 // Uncommon, but possible. If a view is removed from the hierarchy during the call 14796 // to getDisplayList(), the display list will be marked invalid and we should not 14797 // try to use it again. 14798 renderNode = null; 14799 hasDisplayList = false; 14800 } 14801 } 14802 14803 if (hasNoCache) { 14804 boolean layerRendered = false; 14805 if (layerType == LAYER_TYPE_HARDWARE && !usingRenderNodeProperties) { 14806 final HardwareLayer layer = getHardwareLayer(); 14807 if (layer != null && layer.isValid()) { 14808 int restoreAlpha = mLayerPaint.getAlpha(); 14809 mLayerPaint.setAlpha((int) (alpha * 255)); 14810 ((HardwareCanvas) canvas).drawHardwareLayer(layer, 0, 0, mLayerPaint); 14811 mLayerPaint.setAlpha(restoreAlpha); 14812 layerRendered = true; 14813 } else { 14814 final int scrollX = hasDisplayList ? 0 : sx; 14815 final int scrollY = hasDisplayList ? 0 : sy; 14816 canvas.saveLayer(scrollX, scrollY, 14817 scrollX + mRight - mLeft, scrollY + mBottom - mTop, mLayerPaint, 14818 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); 14819 } 14820 } 14821 14822 if (!layerRendered) { 14823 if (!hasDisplayList) { 14824 // Fast path for layouts with no backgrounds 14825 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 14826 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14827 dispatchDraw(canvas); 14828 if (mOverlay != null && !mOverlay.isEmpty()) { 14829 mOverlay.getOverlayView().draw(canvas); 14830 } 14831 } else { 14832 draw(canvas); 14833 } 14834 drawAccessibilityFocus(canvas); 14835 } else { 14836 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14837 ((HardwareCanvas) canvas).drawRenderNode(renderNode, null, flags); 14838 } 14839 } 14840 } else if (cache != null) { 14841 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14842 Paint cachePaint; 14843 int restoreAlpha = 0; 14844 14845 if (layerType == LAYER_TYPE_NONE) { 14846 cachePaint = parent.mCachePaint; 14847 if (cachePaint == null) { 14848 cachePaint = new Paint(); 14849 cachePaint.setDither(false); 14850 parent.mCachePaint = cachePaint; 14851 } 14852 } else { 14853 cachePaint = mLayerPaint; 14854 restoreAlpha = mLayerPaint.getAlpha(); 14855 } 14856 cachePaint.setAlpha((int) (alpha * 255)); 14857 canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); 14858 cachePaint.setAlpha(restoreAlpha); 14859 } 14860 14861 if (restoreTo >= 0) { 14862 canvas.restoreToCount(restoreTo); 14863 } 14864 14865 if (a != null && !more) { 14866 if (!hardwareAccelerated && !a.getFillAfter()) { 14867 onSetAlpha(255); 14868 } 14869 parent.finishAnimatingView(this, a); 14870 } 14871 14872 if (more && hardwareAccelerated) { 14873 if (a.hasAlpha() && (mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 14874 // alpha animations should cause the child to recreate its display list 14875 invalidate(true); 14876 } 14877 } 14878 14879 mRecreateDisplayList = false; 14880 14881 return more; 14882 } 14883 14884 /** 14885 * Manually render this view (and all of its children) to the given Canvas. 14886 * The view must have already done a full layout before this function is 14887 * called. When implementing a view, implement 14888 * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. 14889 * If you do need to override this method, call the superclass version. 14890 * 14891 * @param canvas The Canvas to which the View is rendered. 14892 */ 14893 public void draw(Canvas canvas) { 14894 final int privateFlags = mPrivateFlags; 14895 final boolean dirtyOpaque = (privateFlags & PFLAG_DIRTY_MASK) == PFLAG_DIRTY_OPAQUE && 14896 (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); 14897 mPrivateFlags = (privateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN; 14898 14899 /* 14900 * Draw traversal performs several drawing steps which must be executed 14901 * in the appropriate order: 14902 * 14903 * 1. Draw the background 14904 * 2. If necessary, save the canvas' layers to prepare for fading 14905 * 3. Draw view's content 14906 * 4. Draw children 14907 * 5. If necessary, draw the fading edges and restore layers 14908 * 6. Draw decorations (scrollbars for instance) 14909 */ 14910 14911 // Step 1, draw the background, if needed 14912 int saveCount; 14913 14914 if (!dirtyOpaque) { 14915 drawBackground(canvas); 14916 } 14917 14918 // skip step 2 & 5 if possible (common case) 14919 final int viewFlags = mViewFlags; 14920 boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; 14921 boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; 14922 if (!verticalEdges && !horizontalEdges) { 14923 // Step 3, draw the content 14924 if (!dirtyOpaque) onDraw(canvas); 14925 14926 // Step 4, draw the children 14927 dispatchDraw(canvas); 14928 14929 // Step 6, draw decorations (scrollbars) 14930 onDrawScrollBars(canvas); 14931 14932 if (mOverlay != null && !mOverlay.isEmpty()) { 14933 mOverlay.getOverlayView().dispatchDraw(canvas); 14934 } 14935 14936 // we're done... 14937 return; 14938 } 14939 14940 /* 14941 * Here we do the full fledged routine... 14942 * (this is an uncommon case where speed matters less, 14943 * this is why we repeat some of the tests that have been 14944 * done above) 14945 */ 14946 14947 boolean drawTop = false; 14948 boolean drawBottom = false; 14949 boolean drawLeft = false; 14950 boolean drawRight = false; 14951 14952 float topFadeStrength = 0.0f; 14953 float bottomFadeStrength = 0.0f; 14954 float leftFadeStrength = 0.0f; 14955 float rightFadeStrength = 0.0f; 14956 14957 // Step 2, save the canvas' layers 14958 int paddingLeft = mPaddingLeft; 14959 14960 final boolean offsetRequired = isPaddingOffsetRequired(); 14961 if (offsetRequired) { 14962 paddingLeft += getLeftPaddingOffset(); 14963 } 14964 14965 int left = mScrollX + paddingLeft; 14966 int right = left + mRight - mLeft - mPaddingRight - paddingLeft; 14967 int top = mScrollY + getFadeTop(offsetRequired); 14968 int bottom = top + getFadeHeight(offsetRequired); 14969 14970 if (offsetRequired) { 14971 right += getRightPaddingOffset(); 14972 bottom += getBottomPaddingOffset(); 14973 } 14974 14975 final ScrollabilityCache scrollabilityCache = mScrollCache; 14976 final float fadeHeight = scrollabilityCache.fadingEdgeLength; 14977 int length = (int) fadeHeight; 14978 14979 // clip the fade length if top and bottom fades overlap 14980 // overlapping fades produce odd-looking artifacts 14981 if (verticalEdges && (top + length > bottom - length)) { 14982 length = (bottom - top) / 2; 14983 } 14984 14985 // also clip horizontal fades if necessary 14986 if (horizontalEdges && (left + length > right - length)) { 14987 length = (right - left) / 2; 14988 } 14989 14990 if (verticalEdges) { 14991 topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); 14992 drawTop = topFadeStrength * fadeHeight > 1.0f; 14993 bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); 14994 drawBottom = bottomFadeStrength * fadeHeight > 1.0f; 14995 } 14996 14997 if (horizontalEdges) { 14998 leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); 14999 drawLeft = leftFadeStrength * fadeHeight > 1.0f; 15000 rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); 15001 drawRight = rightFadeStrength * fadeHeight > 1.0f; 15002 } 15003 15004 saveCount = canvas.getSaveCount(); 15005 15006 int solidColor = getSolidColor(); 15007 if (solidColor == 0) { 15008 final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 15009 15010 if (drawTop) { 15011 canvas.saveLayer(left, top, right, top + length, null, flags); 15012 } 15013 15014 if (drawBottom) { 15015 canvas.saveLayer(left, bottom - length, right, bottom, null, flags); 15016 } 15017 15018 if (drawLeft) { 15019 canvas.saveLayer(left, top, left + length, bottom, null, flags); 15020 } 15021 15022 if (drawRight) { 15023 canvas.saveLayer(right - length, top, right, bottom, null, flags); 15024 } 15025 } else { 15026 scrollabilityCache.setFadeColor(solidColor); 15027 } 15028 15029 // Step 3, draw the content 15030 if (!dirtyOpaque) onDraw(canvas); 15031 15032 // Step 4, draw the children 15033 dispatchDraw(canvas); 15034 15035 // Step 5, draw the fade effect and restore layers 15036 final Paint p = scrollabilityCache.paint; 15037 final Matrix matrix = scrollabilityCache.matrix; 15038 final Shader fade = scrollabilityCache.shader; 15039 15040 if (drawTop) { 15041 matrix.setScale(1, fadeHeight * topFadeStrength); 15042 matrix.postTranslate(left, top); 15043 fade.setLocalMatrix(matrix); 15044 p.setShader(fade); 15045 canvas.drawRect(left, top, right, top + length, p); 15046 } 15047 15048 if (drawBottom) { 15049 matrix.setScale(1, fadeHeight * bottomFadeStrength); 15050 matrix.postRotate(180); 15051 matrix.postTranslate(left, bottom); 15052 fade.setLocalMatrix(matrix); 15053 p.setShader(fade); 15054 canvas.drawRect(left, bottom - length, right, bottom, p); 15055 } 15056 15057 if (drawLeft) { 15058 matrix.setScale(1, fadeHeight * leftFadeStrength); 15059 matrix.postRotate(-90); 15060 matrix.postTranslate(left, top); 15061 fade.setLocalMatrix(matrix); 15062 p.setShader(fade); 15063 canvas.drawRect(left, top, left + length, bottom, p); 15064 } 15065 15066 if (drawRight) { 15067 matrix.setScale(1, fadeHeight * rightFadeStrength); 15068 matrix.postRotate(90); 15069 matrix.postTranslate(right, top); 15070 fade.setLocalMatrix(matrix); 15071 p.setShader(fade); 15072 canvas.drawRect(right - length, top, right, bottom, p); 15073 } 15074 15075 canvas.restoreToCount(saveCount); 15076 15077 // Step 6, draw decorations (scrollbars) 15078 onDrawScrollBars(canvas); 15079 15080 if (mOverlay != null && !mOverlay.isEmpty()) { 15081 mOverlay.getOverlayView().dispatchDraw(canvas); 15082 } 15083 } 15084 15085 /** 15086 * Draws the accessibility focus rect onto the specified canvas. 15087 * 15088 * @param canvas Canvas on which to draw the focus rect 15089 */ 15090 private void drawAccessibilityFocus(Canvas canvas) { 15091 if (mAttachInfo == null) { 15092 return; 15093 } 15094 15095 final Rect bounds = mAttachInfo.mTmpInvalRect; 15096 final ViewRootImpl viewRoot = getViewRootImpl(); 15097 if (viewRoot == null || viewRoot.getAccessibilityFocusedHost() != this) { 15098 return; 15099 } 15100 15101 final AccessibilityManager manager = AccessibilityManager.getInstance(mContext); 15102 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 15103 return; 15104 } 15105 15106 final Drawable drawable = viewRoot.getAccessibilityFocusedDrawable(); 15107 if (drawable == null) { 15108 return; 15109 } 15110 15111 final AccessibilityNodeInfo virtualView = viewRoot.getAccessibilityFocusedVirtualView(); 15112 if (virtualView != null) { 15113 virtualView.getBoundsInScreen(bounds); 15114 final int[] offset = mAttachInfo.mTmpLocation; 15115 getLocationOnScreen(offset); 15116 bounds.offset(-offset[0], -offset[1]); 15117 } else { 15118 bounds.set(0, 0, mRight - mLeft, mBottom - mTop); 15119 } 15120 15121 canvas.translate(mScrollX, mScrollY); 15122 drawable.setBounds(bounds); 15123 drawable.draw(canvas); 15124 canvas.translate(-mScrollX, -mScrollY); 15125 } 15126 15127 /** 15128 * Draws the background onto the specified canvas. 15129 * 15130 * @param canvas Canvas on which to draw the background 15131 */ 15132 private void drawBackground(Canvas canvas) { 15133 final Drawable background = mBackground; 15134 if (background == null) { 15135 return; 15136 } 15137 15138 if (mBackgroundSizeChanged) { 15139 background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); 15140 mBackgroundSizeChanged = false; 15141 invalidateOutline(); 15142 } 15143 15144 // Attempt to use a display list if requested. 15145 if (canvas.isHardwareAccelerated() && mAttachInfo != null 15146 && mAttachInfo.mHardwareRenderer != null) { 15147 mBackgroundRenderNode = getDrawableRenderNode(background, mBackgroundRenderNode); 15148 15149 final RenderNode displayList = mBackgroundRenderNode; 15150 if (displayList != null && displayList.isValid()) { 15151 setBackgroundDisplayListProperties(displayList); 15152 ((HardwareCanvas) canvas).drawRenderNode(displayList); 15153 return; 15154 } 15155 } 15156 15157 final int scrollX = mScrollX; 15158 final int scrollY = mScrollY; 15159 if ((scrollX | scrollY) == 0) { 15160 background.draw(canvas); 15161 } else { 15162 canvas.translate(scrollX, scrollY); 15163 background.draw(canvas); 15164 canvas.translate(-scrollX, -scrollY); 15165 } 15166 } 15167 15168 /** 15169 * Set up background drawable display list properties. 15170 * 15171 * @param displayList Valid display list for the background drawable 15172 */ 15173 private void setBackgroundDisplayListProperties(RenderNode displayList) { 15174 displayList.setTranslationX(mScrollX); 15175 displayList.setTranslationY(mScrollY); 15176 } 15177 15178 /** 15179 * Creates a new display list or updates the existing display list for the 15180 * specified Drawable. 15181 * 15182 * @param drawable Drawable for which to create a display list 15183 * @param renderNode Existing RenderNode, or {@code null} 15184 * @return A valid display list for the specified drawable 15185 */ 15186 private static RenderNode getDrawableRenderNode(Drawable drawable, RenderNode renderNode) { 15187 if (renderNode == null) { 15188 renderNode = RenderNode.create(drawable.getClass().getName()); 15189 } 15190 15191 final Rect bounds = drawable.getBounds(); 15192 final int width = bounds.width(); 15193 final int height = bounds.height(); 15194 final HardwareCanvas canvas = renderNode.start(width, height); 15195 try { 15196 drawable.draw(canvas); 15197 } finally { 15198 renderNode.end(canvas); 15199 } 15200 15201 // Set up drawable properties that are view-independent. 15202 renderNode.setLeftTopRightBottom(bounds.left, bounds.top, bounds.right, bounds.bottom); 15203 renderNode.setProjectBackwards(drawable.isProjected()); 15204 renderNode.setProjectionReceiver(true); 15205 renderNode.setClipToBounds(false); 15206 return renderNode; 15207 } 15208 15209 /** 15210 * Returns the overlay for this view, creating it if it does not yet exist. 15211 * Adding drawables to the overlay will cause them to be displayed whenever 15212 * the view itself is redrawn. Objects in the overlay should be actively 15213 * managed: remove them when they should not be displayed anymore. The 15214 * overlay will always have the same size as its host view. 15215 * 15216 * <p>Note: Overlays do not currently work correctly with {@link 15217 * SurfaceView} or {@link TextureView}; contents in overlays for these 15218 * types of views may not display correctly.</p> 15219 * 15220 * @return The ViewOverlay object for this view. 15221 * @see ViewOverlay 15222 */ 15223 public ViewOverlay getOverlay() { 15224 if (mOverlay == null) { 15225 mOverlay = new ViewOverlay(mContext, this); 15226 } 15227 return mOverlay; 15228 } 15229 15230 /** 15231 * Override this if your view is known to always be drawn on top of a solid color background, 15232 * and needs to draw fading edges. Returning a non-zero color enables the view system to 15233 * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha 15234 * should be set to 0xFF. 15235 * 15236 * @see #setVerticalFadingEdgeEnabled(boolean) 15237 * @see #setHorizontalFadingEdgeEnabled(boolean) 15238 * 15239 * @return The known solid color background for this view, or 0 if the color may vary 15240 */ 15241 @ViewDebug.ExportedProperty(category = "drawing") 15242 public int getSolidColor() { 15243 return 0; 15244 } 15245 15246 /** 15247 * Build a human readable string representation of the specified view flags. 15248 * 15249 * @param flags the view flags to convert to a string 15250 * @return a String representing the supplied flags 15251 */ 15252 private static String printFlags(int flags) { 15253 String output = ""; 15254 int numFlags = 0; 15255 if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { 15256 output += "TAKES_FOCUS"; 15257 numFlags++; 15258 } 15259 15260 switch (flags & VISIBILITY_MASK) { 15261 case INVISIBLE: 15262 if (numFlags > 0) { 15263 output += " "; 15264 } 15265 output += "INVISIBLE"; 15266 // USELESS HERE numFlags++; 15267 break; 15268 case GONE: 15269 if (numFlags > 0) { 15270 output += " "; 15271 } 15272 output += "GONE"; 15273 // USELESS HERE numFlags++; 15274 break; 15275 default: 15276 break; 15277 } 15278 return output; 15279 } 15280 15281 /** 15282 * Build a human readable string representation of the specified private 15283 * view flags. 15284 * 15285 * @param privateFlags the private view flags to convert to a string 15286 * @return a String representing the supplied flags 15287 */ 15288 private static String printPrivateFlags(int privateFlags) { 15289 String output = ""; 15290 int numFlags = 0; 15291 15292 if ((privateFlags & PFLAG_WANTS_FOCUS) == PFLAG_WANTS_FOCUS) { 15293 output += "WANTS_FOCUS"; 15294 numFlags++; 15295 } 15296 15297 if ((privateFlags & PFLAG_FOCUSED) == PFLAG_FOCUSED) { 15298 if (numFlags > 0) { 15299 output += " "; 15300 } 15301 output += "FOCUSED"; 15302 numFlags++; 15303 } 15304 15305 if ((privateFlags & PFLAG_SELECTED) == PFLAG_SELECTED) { 15306 if (numFlags > 0) { 15307 output += " "; 15308 } 15309 output += "SELECTED"; 15310 numFlags++; 15311 } 15312 15313 if ((privateFlags & PFLAG_IS_ROOT_NAMESPACE) == PFLAG_IS_ROOT_NAMESPACE) { 15314 if (numFlags > 0) { 15315 output += " "; 15316 } 15317 output += "IS_ROOT_NAMESPACE"; 15318 numFlags++; 15319 } 15320 15321 if ((privateFlags & PFLAG_HAS_BOUNDS) == PFLAG_HAS_BOUNDS) { 15322 if (numFlags > 0) { 15323 output += " "; 15324 } 15325 output += "HAS_BOUNDS"; 15326 numFlags++; 15327 } 15328 15329 if ((privateFlags & PFLAG_DRAWN) == PFLAG_DRAWN) { 15330 if (numFlags > 0) { 15331 output += " "; 15332 } 15333 output += "DRAWN"; 15334 // USELESS HERE numFlags++; 15335 } 15336 return output; 15337 } 15338 15339 /** 15340 * <p>Indicates whether or not this view's layout will be requested during 15341 * the next hierarchy layout pass.</p> 15342 * 15343 * @return true if the layout will be forced during next layout pass 15344 */ 15345 public boolean isLayoutRequested() { 15346 return (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; 15347 } 15348 15349 /** 15350 * Return true if o is a ViewGroup that is laying out using optical bounds. 15351 * @hide 15352 */ 15353 public static boolean isLayoutModeOptical(Object o) { 15354 return o instanceof ViewGroup && ((ViewGroup) o).isLayoutModeOptical(); 15355 } 15356 15357 private boolean setOpticalFrame(int left, int top, int right, int bottom) { 15358 Insets parentInsets = mParent instanceof View ? 15359 ((View) mParent).getOpticalInsets() : Insets.NONE; 15360 Insets childInsets = getOpticalInsets(); 15361 return setFrame( 15362 left + parentInsets.left - childInsets.left, 15363 top + parentInsets.top - childInsets.top, 15364 right + parentInsets.left + childInsets.right, 15365 bottom + parentInsets.top + childInsets.bottom); 15366 } 15367 15368 /** 15369 * Assign a size and position to a view and all of its 15370 * descendants 15371 * 15372 * <p>This is the second phase of the layout mechanism. 15373 * (The first is measuring). In this phase, each parent calls 15374 * layout on all of its children to position them. 15375 * This is typically done using the child measurements 15376 * that were stored in the measure pass().</p> 15377 * 15378 * <p>Derived classes should not override this method. 15379 * Derived classes with children should override 15380 * onLayout. In that method, they should 15381 * call layout on each of their children.</p> 15382 * 15383 * @param l Left position, relative to parent 15384 * @param t Top position, relative to parent 15385 * @param r Right position, relative to parent 15386 * @param b Bottom position, relative to parent 15387 */ 15388 @SuppressWarnings({"unchecked"}) 15389 public void layout(int l, int t, int r, int b) { 15390 if ((mPrivateFlags3 & PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT) != 0) { 15391 onMeasure(mOldWidthMeasureSpec, mOldHeightMeasureSpec); 15392 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 15393 } 15394 15395 int oldL = mLeft; 15396 int oldT = mTop; 15397 int oldB = mBottom; 15398 int oldR = mRight; 15399 15400 boolean changed = isLayoutModeOptical(mParent) ? 15401 setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b); 15402 15403 if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) { 15404 onLayout(changed, l, t, r, b); 15405 mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED; 15406 15407 ListenerInfo li = mListenerInfo; 15408 if (li != null && li.mOnLayoutChangeListeners != null) { 15409 ArrayList<OnLayoutChangeListener> listenersCopy = 15410 (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone(); 15411 int numListeners = listenersCopy.size(); 15412 for (int i = 0; i < numListeners; ++i) { 15413 listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); 15414 } 15415 } 15416 } 15417 15418 mPrivateFlags &= ~PFLAG_FORCE_LAYOUT; 15419 mPrivateFlags3 |= PFLAG3_IS_LAID_OUT; 15420 } 15421 15422 /** 15423 * Called from layout when this view should 15424 * assign a size and position to each of its children. 15425 * 15426 * Derived classes with children should override 15427 * this method and call layout on each of 15428 * their children. 15429 * @param changed This is a new size or position for this view 15430 * @param left Left position, relative to parent 15431 * @param top Top position, relative to parent 15432 * @param right Right position, relative to parent 15433 * @param bottom Bottom position, relative to parent 15434 */ 15435 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 15436 } 15437 15438 /** 15439 * Assign a size and position to this view. 15440 * 15441 * This is called from layout. 15442 * 15443 * @param left Left position, relative to parent 15444 * @param top Top position, relative to parent 15445 * @param right Right position, relative to parent 15446 * @param bottom Bottom position, relative to parent 15447 * @return true if the new size and position are different than the 15448 * previous ones 15449 * {@hide} 15450 */ 15451 protected boolean setFrame(int left, int top, int right, int bottom) { 15452 boolean changed = false; 15453 15454 if (DBG) { 15455 Log.d("View", this + " View.setFrame(" + left + "," + top + "," 15456 + right + "," + bottom + ")"); 15457 } 15458 15459 if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { 15460 changed = true; 15461 15462 // Remember our drawn bit 15463 int drawn = mPrivateFlags & PFLAG_DRAWN; 15464 15465 int oldWidth = mRight - mLeft; 15466 int oldHeight = mBottom - mTop; 15467 int newWidth = right - left; 15468 int newHeight = bottom - top; 15469 boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); 15470 15471 // Invalidate our old position 15472 invalidate(sizeChanged); 15473 15474 mLeft = left; 15475 mTop = top; 15476 mRight = right; 15477 mBottom = bottom; 15478 mRenderNode.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 15479 15480 mPrivateFlags |= PFLAG_HAS_BOUNDS; 15481 15482 15483 if (sizeChanged) { 15484 sizeChange(newWidth, newHeight, oldWidth, oldHeight); 15485 } 15486 15487 if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) { 15488 // If we are visible, force the DRAWN bit to on so that 15489 // this invalidate will go through (at least to our parent). 15490 // This is because someone may have invalidated this view 15491 // before this call to setFrame came in, thereby clearing 15492 // the DRAWN bit. 15493 mPrivateFlags |= PFLAG_DRAWN; 15494 invalidate(sizeChanged); 15495 // parent display list may need to be recreated based on a change in the bounds 15496 // of any child 15497 invalidateParentCaches(); 15498 } 15499 15500 // Reset drawn bit to original value (invalidate turns it off) 15501 mPrivateFlags |= drawn; 15502 15503 mBackgroundSizeChanged = true; 15504 15505 notifySubtreeAccessibilityStateChangedIfNeeded(); 15506 } 15507 return changed; 15508 } 15509 15510 private void sizeChange(int newWidth, int newHeight, int oldWidth, int oldHeight) { 15511 onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); 15512 if (mOverlay != null) { 15513 mOverlay.getOverlayView().setRight(newWidth); 15514 mOverlay.getOverlayView().setBottom(newHeight); 15515 } 15516 invalidateOutline(); 15517 } 15518 15519 /** 15520 * Finalize inflating a view from XML. This is called as the last phase 15521 * of inflation, after all child views have been added. 15522 * 15523 * <p>Even if the subclass overrides onFinishInflate, they should always be 15524 * sure to call the super method, so that we get called. 15525 */ 15526 protected void onFinishInflate() { 15527 } 15528 15529 /** 15530 * Returns the resources associated with this view. 15531 * 15532 * @return Resources object. 15533 */ 15534 public Resources getResources() { 15535 return mResources; 15536 } 15537 15538 /** 15539 * Invalidates the specified Drawable. 15540 * 15541 * @param drawable the drawable to invalidate 15542 */ 15543 @Override 15544 public void invalidateDrawable(@NonNull Drawable drawable) { 15545 if (verifyDrawable(drawable)) { 15546 final Rect dirty = drawable.getDirtyBounds(); 15547 final int scrollX = mScrollX; 15548 final int scrollY = mScrollY; 15549 15550 invalidate(dirty.left + scrollX, dirty.top + scrollY, 15551 dirty.right + scrollX, dirty.bottom + scrollY); 15552 15553 invalidateOutline(); 15554 } 15555 } 15556 15557 /** 15558 * Schedules an action on a drawable to occur at a specified time. 15559 * 15560 * @param who the recipient of the action 15561 * @param what the action to run on the drawable 15562 * @param when the time at which the action must occur. Uses the 15563 * {@link SystemClock#uptimeMillis} timebase. 15564 */ 15565 @Override 15566 public void scheduleDrawable(Drawable who, Runnable what, long when) { 15567 if (verifyDrawable(who) && what != null) { 15568 final long delay = when - SystemClock.uptimeMillis(); 15569 if (mAttachInfo != null) { 15570 mAttachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 15571 Choreographer.CALLBACK_ANIMATION, what, who, 15572 Choreographer.subtractFrameDelay(delay)); 15573 } else { 15574 ViewRootImpl.getRunQueue().postDelayed(what, delay); 15575 } 15576 } 15577 } 15578 15579 /** 15580 * Cancels a scheduled action on a drawable. 15581 * 15582 * @param who the recipient of the action 15583 * @param what the action to cancel 15584 */ 15585 @Override 15586 public void unscheduleDrawable(Drawable who, Runnable what) { 15587 if (verifyDrawable(who) && what != null) { 15588 if (mAttachInfo != null) { 15589 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 15590 Choreographer.CALLBACK_ANIMATION, what, who); 15591 } 15592 ViewRootImpl.getRunQueue().removeCallbacks(what); 15593 } 15594 } 15595 15596 /** 15597 * Unschedule any events associated with the given Drawable. This can be 15598 * used when selecting a new Drawable into a view, so that the previous 15599 * one is completely unscheduled. 15600 * 15601 * @param who The Drawable to unschedule. 15602 * 15603 * @see #drawableStateChanged 15604 */ 15605 public void unscheduleDrawable(Drawable who) { 15606 if (mAttachInfo != null && who != null) { 15607 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 15608 Choreographer.CALLBACK_ANIMATION, null, who); 15609 } 15610 } 15611 15612 /** 15613 * Resolve the Drawables depending on the layout direction. This is implicitly supposing 15614 * that the View directionality can and will be resolved before its Drawables. 15615 * 15616 * Will call {@link View#onResolveDrawables} when resolution is done. 15617 * 15618 * @hide 15619 */ 15620 protected void resolveDrawables() { 15621 // Drawables resolution may need to happen before resolving the layout direction (which is 15622 // done only during the measure() call). 15623 // If the layout direction is not resolved yet, we cannot resolve the Drawables except in 15624 // one case: when the raw layout direction has not been defined as LAYOUT_DIRECTION_INHERIT. 15625 // So, if the raw layout direction is LAYOUT_DIRECTION_LTR or LAYOUT_DIRECTION_RTL or 15626 // LAYOUT_DIRECTION_LOCALE, we can "cheat" and we don't need to wait for the layout 15627 // direction to be resolved as its resolved value will be the same as its raw value. 15628 if (!isLayoutDirectionResolved() && 15629 getRawLayoutDirection() == View.LAYOUT_DIRECTION_INHERIT) { 15630 return; 15631 } 15632 15633 final int layoutDirection = isLayoutDirectionResolved() ? 15634 getLayoutDirection() : getRawLayoutDirection(); 15635 15636 if (mBackground != null) { 15637 mBackground.setLayoutDirection(layoutDirection); 15638 } 15639 mPrivateFlags2 |= PFLAG2_DRAWABLE_RESOLVED; 15640 onResolveDrawables(layoutDirection); 15641 } 15642 15643 /** 15644 * Called when layout direction has been resolved. 15645 * 15646 * The default implementation does nothing. 15647 * 15648 * @param layoutDirection The resolved layout direction. 15649 * 15650 * @see #LAYOUT_DIRECTION_LTR 15651 * @see #LAYOUT_DIRECTION_RTL 15652 * 15653 * @hide 15654 */ 15655 public void onResolveDrawables(@ResolvedLayoutDir int layoutDirection) { 15656 } 15657 15658 /** 15659 * @hide 15660 */ 15661 protected void resetResolvedDrawables() { 15662 mPrivateFlags2 &= ~PFLAG2_DRAWABLE_RESOLVED; 15663 } 15664 15665 private boolean isDrawablesResolved() { 15666 return (mPrivateFlags2 & PFLAG2_DRAWABLE_RESOLVED) == PFLAG2_DRAWABLE_RESOLVED; 15667 } 15668 15669 /** 15670 * If your view subclass is displaying its own Drawable objects, it should 15671 * override this function and return true for any Drawable it is 15672 * displaying. This allows animations for those drawables to be 15673 * scheduled. 15674 * 15675 * <p>Be sure to call through to the super class when overriding this 15676 * function. 15677 * 15678 * @param who The Drawable to verify. Return true if it is one you are 15679 * displaying, else return the result of calling through to the 15680 * super class. 15681 * 15682 * @return boolean If true than the Drawable is being displayed in the 15683 * view; else false and it is not allowed to animate. 15684 * 15685 * @see #unscheduleDrawable(android.graphics.drawable.Drawable) 15686 * @see #drawableStateChanged() 15687 */ 15688 protected boolean verifyDrawable(Drawable who) { 15689 return who == mBackground; 15690 } 15691 15692 /** 15693 * This function is called whenever the state of the view changes in such 15694 * a way that it impacts the state of drawables being shown. 15695 * <p> 15696 * If the View has a StateListAnimator, it will also be called to run necessary state 15697 * change animations. 15698 * <p> 15699 * Be sure to call through to the superclass when overriding this function. 15700 * 15701 * @see Drawable#setState(int[]) 15702 */ 15703 protected void drawableStateChanged() { 15704 final Drawable d = mBackground; 15705 if (d != null && d.isStateful()) { 15706 d.setState(getDrawableState()); 15707 } 15708 15709 if (mStateListAnimator != null) { 15710 mStateListAnimator.setState(getDrawableState()); 15711 } 15712 } 15713 15714 /** 15715 * This function is called whenever the view hotspot changes and needs to 15716 * be propagated to drawables managed by the view. 15717 * <p> 15718 * Be sure to call through to the superclass when overriding this function. 15719 * 15720 * @param x hotspot x coordinate 15721 * @param y hotspot y coordinate 15722 */ 15723 public void drawableHotspotChanged(float x, float y) { 15724 if (mBackground != null) { 15725 mBackground.setHotspot(x, y); 15726 } 15727 } 15728 15729 /** 15730 * Call this to force a view to update its drawable state. This will cause 15731 * drawableStateChanged to be called on this view. Views that are interested 15732 * in the new state should call getDrawableState. 15733 * 15734 * @see #drawableStateChanged 15735 * @see #getDrawableState 15736 */ 15737 public void refreshDrawableState() { 15738 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 15739 drawableStateChanged(); 15740 15741 ViewParent parent = mParent; 15742 if (parent != null) { 15743 parent.childDrawableStateChanged(this); 15744 } 15745 } 15746 15747 /** 15748 * Return an array of resource IDs of the drawable states representing the 15749 * current state of the view. 15750 * 15751 * @return The current drawable state 15752 * 15753 * @see Drawable#setState(int[]) 15754 * @see #drawableStateChanged() 15755 * @see #onCreateDrawableState(int) 15756 */ 15757 public final int[] getDrawableState() { 15758 if ((mDrawableState != null) && ((mPrivateFlags & PFLAG_DRAWABLE_STATE_DIRTY) == 0)) { 15759 return mDrawableState; 15760 } else { 15761 mDrawableState = onCreateDrawableState(0); 15762 mPrivateFlags &= ~PFLAG_DRAWABLE_STATE_DIRTY; 15763 return mDrawableState; 15764 } 15765 } 15766 15767 /** 15768 * Generate the new {@link android.graphics.drawable.Drawable} state for 15769 * this view. This is called by the view 15770 * system when the cached Drawable state is determined to be invalid. To 15771 * retrieve the current state, you should use {@link #getDrawableState}. 15772 * 15773 * @param extraSpace if non-zero, this is the number of extra entries you 15774 * would like in the returned array in which you can place your own 15775 * states. 15776 * 15777 * @return Returns an array holding the current {@link Drawable} state of 15778 * the view. 15779 * 15780 * @see #mergeDrawableStates(int[], int[]) 15781 */ 15782 protected int[] onCreateDrawableState(int extraSpace) { 15783 if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && 15784 mParent instanceof View) { 15785 return ((View) mParent).onCreateDrawableState(extraSpace); 15786 } 15787 15788 int[] drawableState; 15789 15790 int privateFlags = mPrivateFlags; 15791 15792 int viewStateIndex = 0; 15793 if ((privateFlags & PFLAG_PRESSED) != 0) viewStateIndex |= VIEW_STATE_PRESSED; 15794 if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= VIEW_STATE_ENABLED; 15795 if (isFocused()) viewStateIndex |= VIEW_STATE_FOCUSED; 15796 if ((privateFlags & PFLAG_SELECTED) != 0) viewStateIndex |= VIEW_STATE_SELECTED; 15797 if (hasWindowFocus()) viewStateIndex |= VIEW_STATE_WINDOW_FOCUSED; 15798 if ((privateFlags & PFLAG_ACTIVATED) != 0) viewStateIndex |= VIEW_STATE_ACTIVATED; 15799 if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && 15800 HardwareRenderer.isAvailable()) { 15801 // This is set if HW acceleration is requested, even if the current 15802 // process doesn't allow it. This is just to allow app preview 15803 // windows to better match their app. 15804 viewStateIndex |= VIEW_STATE_ACCELERATED; 15805 } 15806 if ((privateFlags & PFLAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_HOVERED; 15807 15808 final int privateFlags2 = mPrivateFlags2; 15809 if ((privateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0) viewStateIndex |= VIEW_STATE_DRAG_CAN_ACCEPT; 15810 if ((privateFlags2 & PFLAG2_DRAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_DRAG_HOVERED; 15811 15812 drawableState = VIEW_STATE_SETS[viewStateIndex]; 15813 15814 //noinspection ConstantIfStatement 15815 if (false) { 15816 Log.i("View", "drawableStateIndex=" + viewStateIndex); 15817 Log.i("View", toString() 15818 + " pressed=" + ((privateFlags & PFLAG_PRESSED) != 0) 15819 + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) 15820 + " fo=" + hasFocus() 15821 + " sl=" + ((privateFlags & PFLAG_SELECTED) != 0) 15822 + " wf=" + hasWindowFocus() 15823 + ": " + Arrays.toString(drawableState)); 15824 } 15825 15826 if (extraSpace == 0) { 15827 return drawableState; 15828 } 15829 15830 final int[] fullState; 15831 if (drawableState != null) { 15832 fullState = new int[drawableState.length + extraSpace]; 15833 System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); 15834 } else { 15835 fullState = new int[extraSpace]; 15836 } 15837 15838 return fullState; 15839 } 15840 15841 /** 15842 * Merge your own state values in <var>additionalState</var> into the base 15843 * state values <var>baseState</var> that were returned by 15844 * {@link #onCreateDrawableState(int)}. 15845 * 15846 * @param baseState The base state values returned by 15847 * {@link #onCreateDrawableState(int)}, which will be modified to also hold your 15848 * own additional state values. 15849 * 15850 * @param additionalState The additional state values you would like 15851 * added to <var>baseState</var>; this array is not modified. 15852 * 15853 * @return As a convenience, the <var>baseState</var> array you originally 15854 * passed into the function is returned. 15855 * 15856 * @see #onCreateDrawableState(int) 15857 */ 15858 protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { 15859 final int N = baseState.length; 15860 int i = N - 1; 15861 while (i >= 0 && baseState[i] == 0) { 15862 i--; 15863 } 15864 System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); 15865 return baseState; 15866 } 15867 15868 /** 15869 * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} 15870 * on all Drawable objects associated with this view. 15871 * <p> 15872 * Also calls {@link StateListAnimator#jumpToCurrentState()} if there is a StateListAnimator 15873 * attached to this view. 15874 */ 15875 public void jumpDrawablesToCurrentState() { 15876 if (mBackground != null) { 15877 mBackground.jumpToCurrentState(); 15878 } 15879 if (mStateListAnimator != null) { 15880 mStateListAnimator.jumpToCurrentState(); 15881 } 15882 } 15883 15884 /** 15885 * Sets the background color for this view. 15886 * @param color the color of the background 15887 */ 15888 @RemotableViewMethod 15889 public void setBackgroundColor(int color) { 15890 if (mBackground instanceof ColorDrawable) { 15891 ((ColorDrawable) mBackground.mutate()).setColor(color); 15892 computeOpaqueFlags(); 15893 mBackgroundResource = 0; 15894 } else { 15895 setBackground(new ColorDrawable(color)); 15896 } 15897 } 15898 15899 /** 15900 * Set the background to a given resource. The resource should refer to 15901 * a Drawable object or 0 to remove the background. 15902 * @param resid The identifier of the resource. 15903 * 15904 * @attr ref android.R.styleable#View_background 15905 */ 15906 @RemotableViewMethod 15907 public void setBackgroundResource(int resid) { 15908 if (resid != 0 && resid == mBackgroundResource) { 15909 return; 15910 } 15911 15912 Drawable d = null; 15913 if (resid != 0) { 15914 d = mContext.getDrawable(resid); 15915 } 15916 setBackground(d); 15917 15918 mBackgroundResource = resid; 15919 } 15920 15921 /** 15922 * Set the background to a given Drawable, or remove the background. If the 15923 * background has padding, this View's padding is set to the background's 15924 * padding. However, when a background is removed, this View's padding isn't 15925 * touched. If setting the padding is desired, please use 15926 * {@link #setPadding(int, int, int, int)}. 15927 * 15928 * @param background The Drawable to use as the background, or null to remove the 15929 * background 15930 */ 15931 public void setBackground(Drawable background) { 15932 //noinspection deprecation 15933 setBackgroundDrawable(background); 15934 } 15935 15936 /** 15937 * @deprecated use {@link #setBackground(Drawable)} instead 15938 */ 15939 @Deprecated 15940 public void setBackgroundDrawable(Drawable background) { 15941 computeOpaqueFlags(); 15942 15943 if (background == mBackground) { 15944 return; 15945 } 15946 15947 boolean requestLayout = false; 15948 15949 mBackgroundResource = 0; 15950 15951 /* 15952 * Regardless of whether we're setting a new background or not, we want 15953 * to clear the previous drawable. 15954 */ 15955 if (mBackground != null) { 15956 mBackground.setCallback(null); 15957 unscheduleDrawable(mBackground); 15958 } 15959 15960 if (background != null) { 15961 Rect padding = sThreadLocal.get(); 15962 if (padding == null) { 15963 padding = new Rect(); 15964 sThreadLocal.set(padding); 15965 } 15966 resetResolvedDrawables(); 15967 background.setLayoutDirection(getLayoutDirection()); 15968 if (background.getPadding(padding)) { 15969 resetResolvedPadding(); 15970 switch (background.getLayoutDirection()) { 15971 case LAYOUT_DIRECTION_RTL: 15972 mUserPaddingLeftInitial = padding.right; 15973 mUserPaddingRightInitial = padding.left; 15974 internalSetPadding(padding.right, padding.top, padding.left, padding.bottom); 15975 break; 15976 case LAYOUT_DIRECTION_LTR: 15977 default: 15978 mUserPaddingLeftInitial = padding.left; 15979 mUserPaddingRightInitial = padding.right; 15980 internalSetPadding(padding.left, padding.top, padding.right, padding.bottom); 15981 } 15982 mLeftPaddingDefined = false; 15983 mRightPaddingDefined = false; 15984 } 15985 15986 // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or 15987 // if it has a different minimum size, we should layout again 15988 if (mBackground == null 15989 || mBackground.getMinimumHeight() != background.getMinimumHeight() 15990 || mBackground.getMinimumWidth() != background.getMinimumWidth()) { 15991 requestLayout = true; 15992 } 15993 15994 background.setCallback(this); 15995 if (background.isStateful()) { 15996 background.setState(getDrawableState()); 15997 } 15998 background.setVisible(getVisibility() == VISIBLE, false); 15999 mBackground = background; 16000 16001 applyBackgroundTint(); 16002 16003 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 16004 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 16005 mPrivateFlags |= PFLAG_ONLY_DRAWS_BACKGROUND; 16006 requestLayout = true; 16007 } 16008 } else { 16009 /* Remove the background */ 16010 mBackground = null; 16011 16012 if ((mPrivateFlags & PFLAG_ONLY_DRAWS_BACKGROUND) != 0) { 16013 /* 16014 * This view ONLY drew the background before and we're removing 16015 * the background, so now it won't draw anything 16016 * (hence we SKIP_DRAW) 16017 */ 16018 mPrivateFlags &= ~PFLAG_ONLY_DRAWS_BACKGROUND; 16019 mPrivateFlags |= PFLAG_SKIP_DRAW; 16020 } 16021 16022 /* 16023 * When the background is set, we try to apply its padding to this 16024 * View. When the background is removed, we don't touch this View's 16025 * padding. This is noted in the Javadocs. Hence, we don't need to 16026 * requestLayout(), the invalidate() below is sufficient. 16027 */ 16028 16029 // The old background's minimum size could have affected this 16030 // View's layout, so let's requestLayout 16031 requestLayout = true; 16032 } 16033 16034 computeOpaqueFlags(); 16035 16036 if (requestLayout) { 16037 requestLayout(); 16038 } 16039 16040 mBackgroundSizeChanged = true; 16041 invalidate(true); 16042 } 16043 16044 /** 16045 * Gets the background drawable 16046 * 16047 * @return The drawable used as the background for this view, if any. 16048 * 16049 * @see #setBackground(Drawable) 16050 * 16051 * @attr ref android.R.styleable#View_background 16052 */ 16053 public Drawable getBackground() { 16054 return mBackground; 16055 } 16056 16057 /** 16058 * Applies a tint to the background drawable. Does not modify the current tint 16059 * mode, which is {@link PorterDuff.Mode#SRC_ATOP} by default. 16060 * <p> 16061 * Subsequent calls to {@link #setBackground(Drawable)} will automatically 16062 * mutate the drawable and apply the specified tint and tint mode using 16063 * {@link Drawable#setTintList(ColorStateList)}. 16064 * 16065 * @param tint the tint to apply, may be {@code null} to clear tint 16066 * 16067 * @attr ref android.R.styleable#View_backgroundTint 16068 * @see #getBackgroundTintList() 16069 * @see Drawable#setTintList(ColorStateList) 16070 */ 16071 public void setBackgroundTintList(@Nullable ColorStateList tint) { 16072 mBackgroundTintList = tint; 16073 mHasBackgroundTint = true; 16074 16075 applyBackgroundTint(); 16076 } 16077 16078 /** 16079 * @return the tint applied to the background drawable 16080 * @attr ref android.R.styleable#View_backgroundTint 16081 * @see #setBackgroundTintList(ColorStateList) 16082 */ 16083 @Nullable 16084 public ColorStateList getBackgroundTintList() { 16085 return mBackgroundTintList; 16086 } 16087 16088 /** 16089 * Specifies the blending mode used to apply the tint specified by 16090 * {@link #setBackgroundTintList(ColorStateList)}} to the background drawable. 16091 * The default mode is {@link PorterDuff.Mode#SRC_ATOP}. 16092 * 16093 * @param tintMode the blending mode used to apply the tint, may be 16094 * {@code null} to clear tint 16095 * @attr ref android.R.styleable#View_backgroundTintMode 16096 * @see #getBackgroundTintMode() 16097 * @see Drawable#setTintMode(PorterDuff.Mode) 16098 */ 16099 public void setBackgroundTintMode(@Nullable PorterDuff.Mode tintMode) { 16100 mBackgroundTintMode = tintMode; 16101 16102 applyBackgroundTint(); 16103 } 16104 16105 /** 16106 * @return the blending mode used to apply the tint to the background drawable 16107 * @attr ref android.R.styleable#View_backgroundTintMode 16108 * @see #setBackgroundTintMode(PorterDuff.Mode) 16109 */ 16110 @Nullable 16111 public PorterDuff.Mode getBackgroundTintMode() { 16112 return mBackgroundTintMode; 16113 } 16114 16115 private void applyBackgroundTint() { 16116 if (mBackground != null && mHasBackgroundTint) { 16117 mBackground = mBackground.mutate(); 16118 mBackground.setTintList(mBackgroundTintList); 16119 mBackground.setTintMode(mBackgroundTintMode); 16120 } 16121 } 16122 16123 /** 16124 * Sets the padding. The view may add on the space required to display 16125 * the scrollbars, depending on the style and visibility of the scrollbars. 16126 * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, 16127 * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different 16128 * from the values set in this call. 16129 * 16130 * @attr ref android.R.styleable#View_padding 16131 * @attr ref android.R.styleable#View_paddingBottom 16132 * @attr ref android.R.styleable#View_paddingLeft 16133 * @attr ref android.R.styleable#View_paddingRight 16134 * @attr ref android.R.styleable#View_paddingTop 16135 * @param left the left padding in pixels 16136 * @param top the top padding in pixels 16137 * @param right the right padding in pixels 16138 * @param bottom the bottom padding in pixels 16139 */ 16140 public void setPadding(int left, int top, int right, int bottom) { 16141 resetResolvedPadding(); 16142 16143 mUserPaddingStart = UNDEFINED_PADDING; 16144 mUserPaddingEnd = UNDEFINED_PADDING; 16145 16146 mUserPaddingLeftInitial = left; 16147 mUserPaddingRightInitial = right; 16148 16149 mLeftPaddingDefined = true; 16150 mRightPaddingDefined = true; 16151 16152 internalSetPadding(left, top, right, bottom); 16153 } 16154 16155 /** 16156 * @hide 16157 */ 16158 protected void internalSetPadding(int left, int top, int right, int bottom) { 16159 mUserPaddingLeft = left; 16160 mUserPaddingRight = right; 16161 mUserPaddingBottom = bottom; 16162 16163 final int viewFlags = mViewFlags; 16164 boolean changed = false; 16165 16166 // Common case is there are no scroll bars. 16167 if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { 16168 if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { 16169 final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 16170 ? 0 : getVerticalScrollbarWidth(); 16171 switch (mVerticalScrollbarPosition) { 16172 case SCROLLBAR_POSITION_DEFAULT: 16173 if (isLayoutRtl()) { 16174 left += offset; 16175 } else { 16176 right += offset; 16177 } 16178 break; 16179 case SCROLLBAR_POSITION_RIGHT: 16180 right += offset; 16181 break; 16182 case SCROLLBAR_POSITION_LEFT: 16183 left += offset; 16184 break; 16185 } 16186 } 16187 if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { 16188 bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 16189 ? 0 : getHorizontalScrollbarHeight(); 16190 } 16191 } 16192 16193 if (mPaddingLeft != left) { 16194 changed = true; 16195 mPaddingLeft = left; 16196 } 16197 if (mPaddingTop != top) { 16198 changed = true; 16199 mPaddingTop = top; 16200 } 16201 if (mPaddingRight != right) { 16202 changed = true; 16203 mPaddingRight = right; 16204 } 16205 if (mPaddingBottom != bottom) { 16206 changed = true; 16207 mPaddingBottom = bottom; 16208 } 16209 16210 if (changed) { 16211 requestLayout(); 16212 } 16213 } 16214 16215 /** 16216 * Sets the relative padding. The view may add on the space required to display 16217 * the scrollbars, depending on the style and visibility of the scrollbars. 16218 * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, 16219 * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different 16220 * from the values set in this call. 16221 * 16222 * @attr ref android.R.styleable#View_padding 16223 * @attr ref android.R.styleable#View_paddingBottom 16224 * @attr ref android.R.styleable#View_paddingStart 16225 * @attr ref android.R.styleable#View_paddingEnd 16226 * @attr ref android.R.styleable#View_paddingTop 16227 * @param start the start padding in pixels 16228 * @param top the top padding in pixels 16229 * @param end the end padding in pixels 16230 * @param bottom the bottom padding in pixels 16231 */ 16232 public void setPaddingRelative(int start, int top, int end, int bottom) { 16233 resetResolvedPadding(); 16234 16235 mUserPaddingStart = start; 16236 mUserPaddingEnd = end; 16237 mLeftPaddingDefined = true; 16238 mRightPaddingDefined = true; 16239 16240 switch(getLayoutDirection()) { 16241 case LAYOUT_DIRECTION_RTL: 16242 mUserPaddingLeftInitial = end; 16243 mUserPaddingRightInitial = start; 16244 internalSetPadding(end, top, start, bottom); 16245 break; 16246 case LAYOUT_DIRECTION_LTR: 16247 default: 16248 mUserPaddingLeftInitial = start; 16249 mUserPaddingRightInitial = end; 16250 internalSetPadding(start, top, end, bottom); 16251 } 16252 } 16253 16254 /** 16255 * Returns the top padding of this view. 16256 * 16257 * @return the top padding in pixels 16258 */ 16259 public int getPaddingTop() { 16260 return mPaddingTop; 16261 } 16262 16263 /** 16264 * Returns the bottom padding of this view. If there are inset and enabled 16265 * scrollbars, this value may include the space required to display the 16266 * scrollbars as well. 16267 * 16268 * @return the bottom padding in pixels 16269 */ 16270 public int getPaddingBottom() { 16271 return mPaddingBottom; 16272 } 16273 16274 /** 16275 * Returns the left padding of this view. If there are inset and enabled 16276 * scrollbars, this value may include the space required to display the 16277 * scrollbars as well. 16278 * 16279 * @return the left padding in pixels 16280 */ 16281 public int getPaddingLeft() { 16282 if (!isPaddingResolved()) { 16283 resolvePadding(); 16284 } 16285 return mPaddingLeft; 16286 } 16287 16288 /** 16289 * Returns the start padding of this view depending on its resolved layout direction. 16290 * If there are inset and enabled scrollbars, this value may include the space 16291 * required to display the scrollbars as well. 16292 * 16293 * @return the start padding in pixels 16294 */ 16295 public int getPaddingStart() { 16296 if (!isPaddingResolved()) { 16297 resolvePadding(); 16298 } 16299 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 16300 mPaddingRight : mPaddingLeft; 16301 } 16302 16303 /** 16304 * Returns the right padding of this view. If there are inset and enabled 16305 * scrollbars, this value may include the space required to display the 16306 * scrollbars as well. 16307 * 16308 * @return the right padding in pixels 16309 */ 16310 public int getPaddingRight() { 16311 if (!isPaddingResolved()) { 16312 resolvePadding(); 16313 } 16314 return mPaddingRight; 16315 } 16316 16317 /** 16318 * Returns the end padding of this view depending on its resolved layout direction. 16319 * If there are inset and enabled scrollbars, this value may include the space 16320 * required to display the scrollbars as well. 16321 * 16322 * @return the end padding in pixels 16323 */ 16324 public int getPaddingEnd() { 16325 if (!isPaddingResolved()) { 16326 resolvePadding(); 16327 } 16328 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 16329 mPaddingLeft : mPaddingRight; 16330 } 16331 16332 /** 16333 * Return if the padding as been set thru relative values 16334 * {@link #setPaddingRelative(int, int, int, int)} or thru 16335 * @attr ref android.R.styleable#View_paddingStart or 16336 * @attr ref android.R.styleable#View_paddingEnd 16337 * 16338 * @return true if the padding is relative or false if it is not. 16339 */ 16340 public boolean isPaddingRelative() { 16341 return (mUserPaddingStart != UNDEFINED_PADDING || mUserPaddingEnd != UNDEFINED_PADDING); 16342 } 16343 16344 Insets computeOpticalInsets() { 16345 return (mBackground == null) ? Insets.NONE : mBackground.getOpticalInsets(); 16346 } 16347 16348 /** 16349 * @hide 16350 */ 16351 public void resetPaddingToInitialValues() { 16352 if (isRtlCompatibilityMode()) { 16353 mPaddingLeft = mUserPaddingLeftInitial; 16354 mPaddingRight = mUserPaddingRightInitial; 16355 return; 16356 } 16357 if (isLayoutRtl()) { 16358 mPaddingLeft = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingLeftInitial; 16359 mPaddingRight = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingRightInitial; 16360 } else { 16361 mPaddingLeft = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingLeftInitial; 16362 mPaddingRight = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingRightInitial; 16363 } 16364 } 16365 16366 /** 16367 * @hide 16368 */ 16369 public Insets getOpticalInsets() { 16370 if (mLayoutInsets == null) { 16371 mLayoutInsets = computeOpticalInsets(); 16372 } 16373 return mLayoutInsets; 16374 } 16375 16376 /** 16377 * Set this view's optical insets. 16378 * 16379 * <p>This method should be treated similarly to setMeasuredDimension and not as a general 16380 * property. Views that compute their own optical insets should call it as part of measurement. 16381 * This method does not request layout. If you are setting optical insets outside of 16382 * measure/layout itself you will want to call requestLayout() yourself. 16383 * </p> 16384 * @hide 16385 */ 16386 public void setOpticalInsets(Insets insets) { 16387 mLayoutInsets = insets; 16388 } 16389 16390 /** 16391 * Changes the selection state of this view. A view can be selected or not. 16392 * Note that selection is not the same as focus. Views are typically 16393 * selected in the context of an AdapterView like ListView or GridView; 16394 * the selected view is the view that is highlighted. 16395 * 16396 * @param selected true if the view must be selected, false otherwise 16397 */ 16398 public void setSelected(boolean selected) { 16399 //noinspection DoubleNegation 16400 if (((mPrivateFlags & PFLAG_SELECTED) != 0) != selected) { 16401 mPrivateFlags = (mPrivateFlags & ~PFLAG_SELECTED) | (selected ? PFLAG_SELECTED : 0); 16402 if (!selected) resetPressedState(); 16403 invalidate(true); 16404 refreshDrawableState(); 16405 dispatchSetSelected(selected); 16406 notifyViewAccessibilityStateChangedIfNeeded( 16407 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 16408 } 16409 } 16410 16411 /** 16412 * Dispatch setSelected to all of this View's children. 16413 * 16414 * @see #setSelected(boolean) 16415 * 16416 * @param selected The new selected state 16417 */ 16418 protected void dispatchSetSelected(boolean selected) { 16419 } 16420 16421 /** 16422 * Indicates the selection state of this view. 16423 * 16424 * @return true if the view is selected, false otherwise 16425 */ 16426 @ViewDebug.ExportedProperty 16427 public boolean isSelected() { 16428 return (mPrivateFlags & PFLAG_SELECTED) != 0; 16429 } 16430 16431 /** 16432 * Changes the activated state of this view. A view can be activated or not. 16433 * Note that activation is not the same as selection. Selection is 16434 * a transient property, representing the view (hierarchy) the user is 16435 * currently interacting with. Activation is a longer-term state that the 16436 * user can move views in and out of. For example, in a list view with 16437 * single or multiple selection enabled, the views in the current selection 16438 * set are activated. (Um, yeah, we are deeply sorry about the terminology 16439 * here.) The activated state is propagated down to children of the view it 16440 * is set on. 16441 * 16442 * @param activated true if the view must be activated, false otherwise 16443 */ 16444 public void setActivated(boolean activated) { 16445 //noinspection DoubleNegation 16446 if (((mPrivateFlags & PFLAG_ACTIVATED) != 0) != activated) { 16447 mPrivateFlags = (mPrivateFlags & ~PFLAG_ACTIVATED) | (activated ? PFLAG_ACTIVATED : 0); 16448 invalidate(true); 16449 refreshDrawableState(); 16450 dispatchSetActivated(activated); 16451 } 16452 } 16453 16454 /** 16455 * Dispatch setActivated to all of this View's children. 16456 * 16457 * @see #setActivated(boolean) 16458 * 16459 * @param activated The new activated state 16460 */ 16461 protected void dispatchSetActivated(boolean activated) { 16462 } 16463 16464 /** 16465 * Indicates the activation state of this view. 16466 * 16467 * @return true if the view is activated, false otherwise 16468 */ 16469 @ViewDebug.ExportedProperty 16470 public boolean isActivated() { 16471 return (mPrivateFlags & PFLAG_ACTIVATED) != 0; 16472 } 16473 16474 /** 16475 * Returns the ViewTreeObserver for this view's hierarchy. The view tree 16476 * observer can be used to get notifications when global events, like 16477 * layout, happen. 16478 * 16479 * The returned ViewTreeObserver observer is not guaranteed to remain 16480 * valid for the lifetime of this View. If the caller of this method keeps 16481 * a long-lived reference to ViewTreeObserver, it should always check for 16482 * the return value of {@link ViewTreeObserver#isAlive()}. 16483 * 16484 * @return The ViewTreeObserver for this view's hierarchy. 16485 */ 16486 public ViewTreeObserver getViewTreeObserver() { 16487 if (mAttachInfo != null) { 16488 return mAttachInfo.mTreeObserver; 16489 } 16490 if (mFloatingTreeObserver == null) { 16491 mFloatingTreeObserver = new ViewTreeObserver(); 16492 } 16493 return mFloatingTreeObserver; 16494 } 16495 16496 /** 16497 * <p>Finds the topmost view in the current view hierarchy.</p> 16498 * 16499 * @return the topmost view containing this view 16500 */ 16501 public View getRootView() { 16502 if (mAttachInfo != null) { 16503 final View v = mAttachInfo.mRootView; 16504 if (v != null) { 16505 return v; 16506 } 16507 } 16508 16509 View parent = this; 16510 16511 while (parent.mParent != null && parent.mParent instanceof View) { 16512 parent = (View) parent.mParent; 16513 } 16514 16515 return parent; 16516 } 16517 16518 /** 16519 * Transforms a motion event from view-local coordinates to on-screen 16520 * coordinates. 16521 * 16522 * @param ev the view-local motion event 16523 * @return false if the transformation could not be applied 16524 * @hide 16525 */ 16526 public boolean toGlobalMotionEvent(MotionEvent ev) { 16527 final AttachInfo info = mAttachInfo; 16528 if (info == null) { 16529 return false; 16530 } 16531 16532 final Matrix m = info.mTmpMatrix; 16533 m.set(Matrix.IDENTITY_MATRIX); 16534 transformMatrixToGlobal(m); 16535 ev.transform(m); 16536 return true; 16537 } 16538 16539 /** 16540 * Transforms a motion event from on-screen coordinates to view-local 16541 * coordinates. 16542 * 16543 * @param ev the on-screen motion event 16544 * @return false if the transformation could not be applied 16545 * @hide 16546 */ 16547 public boolean toLocalMotionEvent(MotionEvent ev) { 16548 final AttachInfo info = mAttachInfo; 16549 if (info == null) { 16550 return false; 16551 } 16552 16553 final Matrix m = info.mTmpMatrix; 16554 m.set(Matrix.IDENTITY_MATRIX); 16555 transformMatrixToLocal(m); 16556 ev.transform(m); 16557 return true; 16558 } 16559 16560 /** 16561 * Modifies the input matrix such that it maps view-local coordinates to 16562 * on-screen coordinates. 16563 * 16564 * @param m input matrix to modify 16565 * @hide 16566 */ 16567 public void transformMatrixToGlobal(Matrix m) { 16568 final ViewParent parent = mParent; 16569 if (parent instanceof View) { 16570 final View vp = (View) parent; 16571 vp.transformMatrixToGlobal(m); 16572 m.preTranslate(-vp.mScrollX, -vp.mScrollY); 16573 } else if (parent instanceof ViewRootImpl) { 16574 final ViewRootImpl vr = (ViewRootImpl) parent; 16575 vr.transformMatrixToGlobal(m); 16576 m.preTranslate(0, -vr.mCurScrollY); 16577 } 16578 16579 m.preTranslate(mLeft, mTop); 16580 16581 if (!hasIdentityMatrix()) { 16582 m.preConcat(getMatrix()); 16583 } 16584 } 16585 16586 /** 16587 * Modifies the input matrix such that it maps on-screen coordinates to 16588 * view-local coordinates. 16589 * 16590 * @param m input matrix to modify 16591 * @hide 16592 */ 16593 public void transformMatrixToLocal(Matrix m) { 16594 final ViewParent parent = mParent; 16595 if (parent instanceof View) { 16596 final View vp = (View) parent; 16597 vp.transformMatrixToLocal(m); 16598 m.postTranslate(vp.mScrollX, vp.mScrollY); 16599 } else if (parent instanceof ViewRootImpl) { 16600 final ViewRootImpl vr = (ViewRootImpl) parent; 16601 vr.transformMatrixToLocal(m); 16602 m.postTranslate(0, vr.mCurScrollY); 16603 } 16604 16605 m.postTranslate(-mLeft, -mTop); 16606 16607 if (!hasIdentityMatrix()) { 16608 m.postConcat(getInverseMatrix()); 16609 } 16610 } 16611 16612 /** 16613 * @hide 16614 */ 16615 @ViewDebug.ExportedProperty(category = "layout", indexMapping = { 16616 @ViewDebug.IntToString(from = 0, to = "x"), 16617 @ViewDebug.IntToString(from = 1, to = "y") 16618 }) 16619 public int[] getLocationOnScreen() { 16620 int[] location = new int[2]; 16621 getLocationOnScreen(location); 16622 return location; 16623 } 16624 16625 /** 16626 * <p>Computes the coordinates of this view on the screen. The argument 16627 * must be an array of two integers. After the method returns, the array 16628 * contains the x and y location in that order.</p> 16629 * 16630 * @param location an array of two integers in which to hold the coordinates 16631 */ 16632 public void getLocationOnScreen(int[] location) { 16633 getLocationInWindow(location); 16634 16635 final AttachInfo info = mAttachInfo; 16636 if (info != null) { 16637 location[0] += info.mWindowLeft; 16638 location[1] += info.mWindowTop; 16639 } 16640 } 16641 16642 /** 16643 * <p>Computes the coordinates of this view in its window. The argument 16644 * must be an array of two integers. After the method returns, the array 16645 * contains the x and y location in that order.</p> 16646 * 16647 * @param location an array of two integers in which to hold the coordinates 16648 */ 16649 public void getLocationInWindow(int[] location) { 16650 if (location == null || location.length < 2) { 16651 throw new IllegalArgumentException("location must be an array of two integers"); 16652 } 16653 16654 if (mAttachInfo == null) { 16655 // When the view is not attached to a window, this method does not make sense 16656 location[0] = location[1] = 0; 16657 return; 16658 } 16659 16660 float[] position = mAttachInfo.mTmpTransformLocation; 16661 position[0] = position[1] = 0.0f; 16662 16663 if (!hasIdentityMatrix()) { 16664 getMatrix().mapPoints(position); 16665 } 16666 16667 position[0] += mLeft; 16668 position[1] += mTop; 16669 16670 ViewParent viewParent = mParent; 16671 while (viewParent instanceof View) { 16672 final View view = (View) viewParent; 16673 16674 position[0] -= view.mScrollX; 16675 position[1] -= view.mScrollY; 16676 16677 if (!view.hasIdentityMatrix()) { 16678 view.getMatrix().mapPoints(position); 16679 } 16680 16681 position[0] += view.mLeft; 16682 position[1] += view.mTop; 16683 16684 viewParent = view.mParent; 16685 } 16686 16687 if (viewParent instanceof ViewRootImpl) { 16688 // *cough* 16689 final ViewRootImpl vr = (ViewRootImpl) viewParent; 16690 position[1] -= vr.mCurScrollY; 16691 } 16692 16693 location[0] = (int) (position[0] + 0.5f); 16694 location[1] = (int) (position[1] + 0.5f); 16695 } 16696 16697 /** 16698 * {@hide} 16699 * @param id the id of the view to be found 16700 * @return the view of the specified id, null if cannot be found 16701 */ 16702 protected View findViewTraversal(int id) { 16703 if (id == mID) { 16704 return this; 16705 } 16706 return null; 16707 } 16708 16709 /** 16710 * {@hide} 16711 * @param tag the tag of the view to be found 16712 * @return the view of specified tag, null if cannot be found 16713 */ 16714 protected View findViewWithTagTraversal(Object tag) { 16715 if (tag != null && tag.equals(mTag)) { 16716 return this; 16717 } 16718 return null; 16719 } 16720 16721 /** 16722 * {@hide} 16723 * @param predicate The predicate to evaluate. 16724 * @param childToSkip If not null, ignores this child during the recursive traversal. 16725 * @return The first view that matches the predicate or null. 16726 */ 16727 protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 16728 if (predicate.apply(this)) { 16729 return this; 16730 } 16731 return null; 16732 } 16733 16734 /** 16735 * Look for a child view with the given id. If this view has the given 16736 * id, return this view. 16737 * 16738 * @param id The id to search for. 16739 * @return The view that has the given id in the hierarchy or null 16740 */ 16741 public final View findViewById(int id) { 16742 if (id < 0) { 16743 return null; 16744 } 16745 return findViewTraversal(id); 16746 } 16747 16748 /** 16749 * Finds a view by its unuque and stable accessibility id. 16750 * 16751 * @param accessibilityId The searched accessibility id. 16752 * @return The found view. 16753 */ 16754 final View findViewByAccessibilityId(int accessibilityId) { 16755 if (accessibilityId < 0) { 16756 return null; 16757 } 16758 return findViewByAccessibilityIdTraversal(accessibilityId); 16759 } 16760 16761 /** 16762 * Performs the traversal to find a view by its unuque and stable accessibility id. 16763 * 16764 * <strong>Note:</strong>This method does not stop at the root namespace 16765 * boundary since the user can touch the screen at an arbitrary location 16766 * potentially crossing the root namespace bounday which will send an 16767 * accessibility event to accessibility services and they should be able 16768 * to obtain the event source. Also accessibility ids are guaranteed to be 16769 * unique in the window. 16770 * 16771 * @param accessibilityId The accessibility id. 16772 * @return The found view. 16773 * 16774 * @hide 16775 */ 16776 public View findViewByAccessibilityIdTraversal(int accessibilityId) { 16777 if (getAccessibilityViewId() == accessibilityId) { 16778 return this; 16779 } 16780 return null; 16781 } 16782 16783 /** 16784 * Look for a child view with the given tag. If this view has the given 16785 * tag, return this view. 16786 * 16787 * @param tag The tag to search for, using "tag.equals(getTag())". 16788 * @return The View that has the given tag in the hierarchy or null 16789 */ 16790 public final View findViewWithTag(Object tag) { 16791 if (tag == null) { 16792 return null; 16793 } 16794 return findViewWithTagTraversal(tag); 16795 } 16796 16797 /** 16798 * {@hide} 16799 * Look for a child view that matches the specified predicate. 16800 * If this view matches the predicate, return this view. 16801 * 16802 * @param predicate The predicate to evaluate. 16803 * @return The first view that matches the predicate or null. 16804 */ 16805 public final View findViewByPredicate(Predicate<View> predicate) { 16806 return findViewByPredicateTraversal(predicate, null); 16807 } 16808 16809 /** 16810 * {@hide} 16811 * Look for a child view that matches the specified predicate, 16812 * starting with the specified view and its descendents and then 16813 * recusively searching the ancestors and siblings of that view 16814 * until this view is reached. 16815 * 16816 * This method is useful in cases where the predicate does not match 16817 * a single unique view (perhaps multiple views use the same id) 16818 * and we are trying to find the view that is "closest" in scope to the 16819 * starting view. 16820 * 16821 * @param start The view to start from. 16822 * @param predicate The predicate to evaluate. 16823 * @return The first view that matches the predicate or null. 16824 */ 16825 public final View findViewByPredicateInsideOut(View start, Predicate<View> predicate) { 16826 View childToSkip = null; 16827 for (;;) { 16828 View view = start.findViewByPredicateTraversal(predicate, childToSkip); 16829 if (view != null || start == this) { 16830 return view; 16831 } 16832 16833 ViewParent parent = start.getParent(); 16834 if (parent == null || !(parent instanceof View)) { 16835 return null; 16836 } 16837 16838 childToSkip = start; 16839 start = (View) parent; 16840 } 16841 } 16842 16843 /** 16844 * Sets the identifier for this view. The identifier does not have to be 16845 * unique in this view's hierarchy. The identifier should be a positive 16846 * number. 16847 * 16848 * @see #NO_ID 16849 * @see #getId() 16850 * @see #findViewById(int) 16851 * 16852 * @param id a number used to identify the view 16853 * 16854 * @attr ref android.R.styleable#View_id 16855 */ 16856 public void setId(int id) { 16857 mID = id; 16858 if (mID == View.NO_ID && mLabelForId != View.NO_ID) { 16859 mID = generateViewId(); 16860 } 16861 } 16862 16863 /** 16864 * {@hide} 16865 * 16866 * @param isRoot true if the view belongs to the root namespace, false 16867 * otherwise 16868 */ 16869 public void setIsRootNamespace(boolean isRoot) { 16870 if (isRoot) { 16871 mPrivateFlags |= PFLAG_IS_ROOT_NAMESPACE; 16872 } else { 16873 mPrivateFlags &= ~PFLAG_IS_ROOT_NAMESPACE; 16874 } 16875 } 16876 16877 /** 16878 * {@hide} 16879 * 16880 * @return true if the view belongs to the root namespace, false otherwise 16881 */ 16882 public boolean isRootNamespace() { 16883 return (mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0; 16884 } 16885 16886 /** 16887 * Returns this view's identifier. 16888 * 16889 * @return a positive integer used to identify the view or {@link #NO_ID} 16890 * if the view has no ID 16891 * 16892 * @see #setId(int) 16893 * @see #findViewById(int) 16894 * @attr ref android.R.styleable#View_id 16895 */ 16896 @ViewDebug.CapturedViewProperty 16897 public int getId() { 16898 return mID; 16899 } 16900 16901 /** 16902 * Returns this view's tag. 16903 * 16904 * @return the Object stored in this view as a tag, or {@code null} if not 16905 * set 16906 * 16907 * @see #setTag(Object) 16908 * @see #getTag(int) 16909 */ 16910 @ViewDebug.ExportedProperty 16911 public Object getTag() { 16912 return mTag; 16913 } 16914 16915 /** 16916 * Sets the tag associated with this view. A tag can be used to mark 16917 * a view in its hierarchy and does not have to be unique within the 16918 * hierarchy. Tags can also be used to store data within a view without 16919 * resorting to another data structure. 16920 * 16921 * @param tag an Object to tag the view with 16922 * 16923 * @see #getTag() 16924 * @see #setTag(int, Object) 16925 */ 16926 public void setTag(final Object tag) { 16927 mTag = tag; 16928 } 16929 16930 /** 16931 * Returns the tag associated with this view and the specified key. 16932 * 16933 * @param key The key identifying the tag 16934 * 16935 * @return the Object stored in this view as a tag, or {@code null} if not 16936 * set 16937 * 16938 * @see #setTag(int, Object) 16939 * @see #getTag() 16940 */ 16941 public Object getTag(int key) { 16942 if (mKeyedTags != null) return mKeyedTags.get(key); 16943 return null; 16944 } 16945 16946 /** 16947 * Sets a tag associated with this view and a key. A tag can be used 16948 * to mark a view in its hierarchy and does not have to be unique within 16949 * the hierarchy. Tags can also be used to store data within a view 16950 * without resorting to another data structure. 16951 * 16952 * The specified key should be an id declared in the resources of the 16953 * application to ensure it is unique (see the <a 16954 * href={@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). 16955 * Keys identified as belonging to 16956 * the Android framework or not associated with any package will cause 16957 * an {@link IllegalArgumentException} to be thrown. 16958 * 16959 * @param key The key identifying the tag 16960 * @param tag An Object to tag the view with 16961 * 16962 * @throws IllegalArgumentException If they specified key is not valid 16963 * 16964 * @see #setTag(Object) 16965 * @see #getTag(int) 16966 */ 16967 public void setTag(int key, final Object tag) { 16968 // If the package id is 0x00 or 0x01, it's either an undefined package 16969 // or a framework id 16970 if ((key >>> 24) < 2) { 16971 throw new IllegalArgumentException("The key must be an application-specific " 16972 + "resource id."); 16973 } 16974 16975 setKeyedTag(key, tag); 16976 } 16977 16978 /** 16979 * Variation of {@link #setTag(int, Object)} that enforces the key to be a 16980 * framework id. 16981 * 16982 * @hide 16983 */ 16984 public void setTagInternal(int key, Object tag) { 16985 if ((key >>> 24) != 0x1) { 16986 throw new IllegalArgumentException("The key must be a framework-specific " 16987 + "resource id."); 16988 } 16989 16990 setKeyedTag(key, tag); 16991 } 16992 16993 private void setKeyedTag(int key, Object tag) { 16994 if (mKeyedTags == null) { 16995 mKeyedTags = new SparseArray<Object>(2); 16996 } 16997 16998 mKeyedTags.put(key, tag); 16999 } 17000 17001 /** 17002 * Prints information about this view in the log output, with the tag 17003 * {@link #VIEW_LOG_TAG}. 17004 * 17005 * @hide 17006 */ 17007 public void debug() { 17008 debug(0); 17009 } 17010 17011 /** 17012 * Prints information about this view in the log output, with the tag 17013 * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an 17014 * indentation defined by the <code>depth</code>. 17015 * 17016 * @param depth the indentation level 17017 * 17018 * @hide 17019 */ 17020 protected void debug(int depth) { 17021 String output = debugIndent(depth - 1); 17022 17023 output += "+ " + this; 17024 int id = getId(); 17025 if (id != -1) { 17026 output += " (id=" + id + ")"; 17027 } 17028 Object tag = getTag(); 17029 if (tag != null) { 17030 output += " (tag=" + tag + ")"; 17031 } 17032 Log.d(VIEW_LOG_TAG, output); 17033 17034 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 17035 output = debugIndent(depth) + " FOCUSED"; 17036 Log.d(VIEW_LOG_TAG, output); 17037 } 17038 17039 output = debugIndent(depth); 17040 output += "frame={" + mLeft + ", " + mTop + ", " + mRight 17041 + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY 17042 + "} "; 17043 Log.d(VIEW_LOG_TAG, output); 17044 17045 if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 17046 || mPaddingBottom != 0) { 17047 output = debugIndent(depth); 17048 output += "padding={" + mPaddingLeft + ", " + mPaddingTop 17049 + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; 17050 Log.d(VIEW_LOG_TAG, output); 17051 } 17052 17053 output = debugIndent(depth); 17054 output += "mMeasureWidth=" + mMeasuredWidth + 17055 " mMeasureHeight=" + mMeasuredHeight; 17056 Log.d(VIEW_LOG_TAG, output); 17057 17058 output = debugIndent(depth); 17059 if (mLayoutParams == null) { 17060 output += "BAD! no layout params"; 17061 } else { 17062 output = mLayoutParams.debug(output); 17063 } 17064 Log.d(VIEW_LOG_TAG, output); 17065 17066 output = debugIndent(depth); 17067 output += "flags={"; 17068 output += View.printFlags(mViewFlags); 17069 output += "}"; 17070 Log.d(VIEW_LOG_TAG, output); 17071 17072 output = debugIndent(depth); 17073 output += "privateFlags={"; 17074 output += View.printPrivateFlags(mPrivateFlags); 17075 output += "}"; 17076 Log.d(VIEW_LOG_TAG, output); 17077 } 17078 17079 /** 17080 * Creates a string of whitespaces used for indentation. 17081 * 17082 * @param depth the indentation level 17083 * @return a String containing (depth * 2 + 3) * 2 white spaces 17084 * 17085 * @hide 17086 */ 17087 protected static String debugIndent(int depth) { 17088 StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); 17089 for (int i = 0; i < (depth * 2) + 3; i++) { 17090 spaces.append(' ').append(' '); 17091 } 17092 return spaces.toString(); 17093 } 17094 17095 /** 17096 * <p>Return the offset of the widget's text baseline from the widget's top 17097 * boundary. If this widget does not support baseline alignment, this 17098 * method returns -1. </p> 17099 * 17100 * @return the offset of the baseline within the widget's bounds or -1 17101 * if baseline alignment is not supported 17102 */ 17103 @ViewDebug.ExportedProperty(category = "layout") 17104 public int getBaseline() { 17105 return -1; 17106 } 17107 17108 /** 17109 * Returns whether the view hierarchy is currently undergoing a layout pass. This 17110 * information is useful to avoid situations such as calling {@link #requestLayout()} during 17111 * a layout pass. 17112 * 17113 * @return whether the view hierarchy is currently undergoing a layout pass 17114 */ 17115 public boolean isInLayout() { 17116 ViewRootImpl viewRoot = getViewRootImpl(); 17117 return (viewRoot != null && viewRoot.isInLayout()); 17118 } 17119 17120 /** 17121 * Call this when something has changed which has invalidated the 17122 * layout of this view. This will schedule a layout pass of the view 17123 * tree. This should not be called while the view hierarchy is currently in a layout 17124 * pass ({@link #isInLayout()}. If layout is happening, the request may be honored at the 17125 * end of the current layout pass (and then layout will run again) or after the current 17126 * frame is drawn and the next layout occurs. 17127 * 17128 * <p>Subclasses which override this method should call the superclass method to 17129 * handle possible request-during-layout errors correctly.</p> 17130 */ 17131 public void requestLayout() { 17132 if (mMeasureCache != null) mMeasureCache.clear(); 17133 17134 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == null) { 17135 // Only trigger request-during-layout logic if this is the view requesting it, 17136 // not the views in its parent hierarchy 17137 ViewRootImpl viewRoot = getViewRootImpl(); 17138 if (viewRoot != null && viewRoot.isInLayout()) { 17139 if (!viewRoot.requestLayoutDuringLayout(this)) { 17140 return; 17141 } 17142 } 17143 mAttachInfo.mViewRequestingLayout = this; 17144 } 17145 17146 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 17147 mPrivateFlags |= PFLAG_INVALIDATED; 17148 17149 if (mParent != null && !mParent.isLayoutRequested()) { 17150 mParent.requestLayout(); 17151 } 17152 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == this) { 17153 mAttachInfo.mViewRequestingLayout = null; 17154 } 17155 } 17156 17157 /** 17158 * Forces this view to be laid out during the next layout pass. 17159 * This method does not call requestLayout() or forceLayout() 17160 * on the parent. 17161 */ 17162 public void forceLayout() { 17163 if (mMeasureCache != null) mMeasureCache.clear(); 17164 17165 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 17166 mPrivateFlags |= PFLAG_INVALIDATED; 17167 } 17168 17169 /** 17170 * <p> 17171 * This is called to find out how big a view should be. The parent 17172 * supplies constraint information in the width and height parameters. 17173 * </p> 17174 * 17175 * <p> 17176 * The actual measurement work of a view is performed in 17177 * {@link #onMeasure(int, int)}, called by this method. Therefore, only 17178 * {@link #onMeasure(int, int)} can and must be overridden by subclasses. 17179 * </p> 17180 * 17181 * 17182 * @param widthMeasureSpec Horizontal space requirements as imposed by the 17183 * parent 17184 * @param heightMeasureSpec Vertical space requirements as imposed by the 17185 * parent 17186 * 17187 * @see #onMeasure(int, int) 17188 */ 17189 public final void measure(int widthMeasureSpec, int heightMeasureSpec) { 17190 boolean optical = isLayoutModeOptical(this); 17191 if (optical != isLayoutModeOptical(mParent)) { 17192 Insets insets = getOpticalInsets(); 17193 int oWidth = insets.left + insets.right; 17194 int oHeight = insets.top + insets.bottom; 17195 widthMeasureSpec = MeasureSpec.adjust(widthMeasureSpec, optical ? -oWidth : oWidth); 17196 heightMeasureSpec = MeasureSpec.adjust(heightMeasureSpec, optical ? -oHeight : oHeight); 17197 } 17198 17199 // Suppress sign extension for the low bytes 17200 long key = (long) widthMeasureSpec << 32 | (long) heightMeasureSpec & 0xffffffffL; 17201 if (mMeasureCache == null) mMeasureCache = new LongSparseLongArray(2); 17202 17203 if ((mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT || 17204 widthMeasureSpec != mOldWidthMeasureSpec || 17205 heightMeasureSpec != mOldHeightMeasureSpec) { 17206 17207 // first clears the measured dimension flag 17208 mPrivateFlags &= ~PFLAG_MEASURED_DIMENSION_SET; 17209 17210 resolveRtlPropertiesIfNeeded(); 17211 17212 int cacheIndex = (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT ? -1 : 17213 mMeasureCache.indexOfKey(key); 17214 if (cacheIndex < 0 || sIgnoreMeasureCache) { 17215 // measure ourselves, this should set the measured dimension flag back 17216 onMeasure(widthMeasureSpec, heightMeasureSpec); 17217 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 17218 } else { 17219 long value = mMeasureCache.valueAt(cacheIndex); 17220 // Casting a long to int drops the high 32 bits, no mask needed 17221 setMeasuredDimensionRaw((int) (value >> 32), (int) value); 17222 mPrivateFlags3 |= PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 17223 } 17224 17225 // flag not set, setMeasuredDimension() was not invoked, we raise 17226 // an exception to warn the developer 17227 if ((mPrivateFlags & PFLAG_MEASURED_DIMENSION_SET) != PFLAG_MEASURED_DIMENSION_SET) { 17228 throw new IllegalStateException("onMeasure() did not set the" 17229 + " measured dimension by calling" 17230 + " setMeasuredDimension()"); 17231 } 17232 17233 mPrivateFlags |= PFLAG_LAYOUT_REQUIRED; 17234 } 17235 17236 mOldWidthMeasureSpec = widthMeasureSpec; 17237 mOldHeightMeasureSpec = heightMeasureSpec; 17238 17239 mMeasureCache.put(key, ((long) mMeasuredWidth) << 32 | 17240 (long) mMeasuredHeight & 0xffffffffL); // suppress sign extension 17241 } 17242 17243 /** 17244 * <p> 17245 * Measure the view and its content to determine the measured width and the 17246 * measured height. This method is invoked by {@link #measure(int, int)} and 17247 * should be overriden by subclasses to provide accurate and efficient 17248 * measurement of their contents. 17249 * </p> 17250 * 17251 * <p> 17252 * <strong>CONTRACT:</strong> When overriding this method, you 17253 * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the 17254 * measured width and height of this view. Failure to do so will trigger an 17255 * <code>IllegalStateException</code>, thrown by 17256 * {@link #measure(int, int)}. Calling the superclass' 17257 * {@link #onMeasure(int, int)} is a valid use. 17258 * </p> 17259 * 17260 * <p> 17261 * The base class implementation of measure defaults to the background size, 17262 * unless a larger size is allowed by the MeasureSpec. Subclasses should 17263 * override {@link #onMeasure(int, int)} to provide better measurements of 17264 * their content. 17265 * </p> 17266 * 17267 * <p> 17268 * If this method is overridden, it is the subclass's responsibility to make 17269 * sure the measured height and width are at least the view's minimum height 17270 * and width ({@link #getSuggestedMinimumHeight()} and 17271 * {@link #getSuggestedMinimumWidth()}). 17272 * </p> 17273 * 17274 * @param widthMeasureSpec horizontal space requirements as imposed by the parent. 17275 * The requirements are encoded with 17276 * {@link android.view.View.MeasureSpec}. 17277 * @param heightMeasureSpec vertical space requirements as imposed by the parent. 17278 * The requirements are encoded with 17279 * {@link android.view.View.MeasureSpec}. 17280 * 17281 * @see #getMeasuredWidth() 17282 * @see #getMeasuredHeight() 17283 * @see #setMeasuredDimension(int, int) 17284 * @see #getSuggestedMinimumHeight() 17285 * @see #getSuggestedMinimumWidth() 17286 * @see android.view.View.MeasureSpec#getMode(int) 17287 * @see android.view.View.MeasureSpec#getSize(int) 17288 */ 17289 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 17290 setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), 17291 getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); 17292 } 17293 17294 /** 17295 * <p>This method must be called by {@link #onMeasure(int, int)} to store the 17296 * measured width and measured height. Failing to do so will trigger an 17297 * exception at measurement time.</p> 17298 * 17299 * @param measuredWidth The measured width of this view. May be a complex 17300 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 17301 * {@link #MEASURED_STATE_TOO_SMALL}. 17302 * @param measuredHeight The measured height of this view. May be a complex 17303 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 17304 * {@link #MEASURED_STATE_TOO_SMALL}. 17305 */ 17306 protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { 17307 boolean optical = isLayoutModeOptical(this); 17308 if (optical != isLayoutModeOptical(mParent)) { 17309 Insets insets = getOpticalInsets(); 17310 int opticalWidth = insets.left + insets.right; 17311 int opticalHeight = insets.top + insets.bottom; 17312 17313 measuredWidth += optical ? opticalWidth : -opticalWidth; 17314 measuredHeight += optical ? opticalHeight : -opticalHeight; 17315 } 17316 setMeasuredDimensionRaw(measuredWidth, measuredHeight); 17317 } 17318 17319 /** 17320 * Sets the measured dimension without extra processing for things like optical bounds. 17321 * Useful for reapplying consistent values that have already been cooked with adjustments 17322 * for optical bounds, etc. such as those from the measurement cache. 17323 * 17324 * @param measuredWidth The measured width of this view. May be a complex 17325 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 17326 * {@link #MEASURED_STATE_TOO_SMALL}. 17327 * @param measuredHeight The measured height of this view. May be a complex 17328 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 17329 * {@link #MEASURED_STATE_TOO_SMALL}. 17330 */ 17331 private void setMeasuredDimensionRaw(int measuredWidth, int measuredHeight) { 17332 mMeasuredWidth = measuredWidth; 17333 mMeasuredHeight = measuredHeight; 17334 17335 mPrivateFlags |= PFLAG_MEASURED_DIMENSION_SET; 17336 } 17337 17338 /** 17339 * Merge two states as returned by {@link #getMeasuredState()}. 17340 * @param curState The current state as returned from a view or the result 17341 * of combining multiple views. 17342 * @param newState The new view state to combine. 17343 * @return Returns a new integer reflecting the combination of the two 17344 * states. 17345 */ 17346 public static int combineMeasuredStates(int curState, int newState) { 17347 return curState | newState; 17348 } 17349 17350 /** 17351 * Version of {@link #resolveSizeAndState(int, int, int)} 17352 * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. 17353 */ 17354 public static int resolveSize(int size, int measureSpec) { 17355 return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; 17356 } 17357 17358 /** 17359 * Utility to reconcile a desired size and state, with constraints imposed 17360 * by a MeasureSpec. Will take the desired size, unless a different size 17361 * is imposed by the constraints. The returned value is a compound integer, 17362 * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and 17363 * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the resulting 17364 * size is smaller than the size the view wants to be. 17365 * 17366 * @param size How big the view wants to be 17367 * @param measureSpec Constraints imposed by the parent 17368 * @return Size information bit mask as defined by 17369 * {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 17370 */ 17371 public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { 17372 int result = size; 17373 int specMode = MeasureSpec.getMode(measureSpec); 17374 int specSize = MeasureSpec.getSize(measureSpec); 17375 switch (specMode) { 17376 case MeasureSpec.UNSPECIFIED: 17377 result = size; 17378 break; 17379 case MeasureSpec.AT_MOST: 17380 if (specSize < size) { 17381 result = specSize | MEASURED_STATE_TOO_SMALL; 17382 } else { 17383 result = size; 17384 } 17385 break; 17386 case MeasureSpec.EXACTLY: 17387 result = specSize; 17388 break; 17389 } 17390 return result | (childMeasuredState&MEASURED_STATE_MASK); 17391 } 17392 17393 /** 17394 * Utility to return a default size. Uses the supplied size if the 17395 * MeasureSpec imposed no constraints. Will get larger if allowed 17396 * by the MeasureSpec. 17397 * 17398 * @param size Default size for this view 17399 * @param measureSpec Constraints imposed by the parent 17400 * @return The size this view should be. 17401 */ 17402 public static int getDefaultSize(int size, int measureSpec) { 17403 int result = size; 17404 int specMode = MeasureSpec.getMode(measureSpec); 17405 int specSize = MeasureSpec.getSize(measureSpec); 17406 17407 switch (specMode) { 17408 case MeasureSpec.UNSPECIFIED: 17409 result = size; 17410 break; 17411 case MeasureSpec.AT_MOST: 17412 case MeasureSpec.EXACTLY: 17413 result = specSize; 17414 break; 17415 } 17416 return result; 17417 } 17418 17419 /** 17420 * Returns the suggested minimum height that the view should use. This 17421 * returns the maximum of the view's minimum height 17422 * and the background's minimum height 17423 * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). 17424 * <p> 17425 * When being used in {@link #onMeasure(int, int)}, the caller should still 17426 * ensure the returned height is within the requirements of the parent. 17427 * 17428 * @return The suggested minimum height of the view. 17429 */ 17430 protected int getSuggestedMinimumHeight() { 17431 return (mBackground == null) ? mMinHeight : max(mMinHeight, mBackground.getMinimumHeight()); 17432 17433 } 17434 17435 /** 17436 * Returns the suggested minimum width that the view should use. This 17437 * returns the maximum of the view's minimum width) 17438 * and the background's minimum width 17439 * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). 17440 * <p> 17441 * When being used in {@link #onMeasure(int, int)}, the caller should still 17442 * ensure the returned width is within the requirements of the parent. 17443 * 17444 * @return The suggested minimum width of the view. 17445 */ 17446 protected int getSuggestedMinimumWidth() { 17447 return (mBackground == null) ? mMinWidth : max(mMinWidth, mBackground.getMinimumWidth()); 17448 } 17449 17450 /** 17451 * Returns the minimum height of the view. 17452 * 17453 * @return the minimum height the view will try to be. 17454 * 17455 * @see #setMinimumHeight(int) 17456 * 17457 * @attr ref android.R.styleable#View_minHeight 17458 */ 17459 public int getMinimumHeight() { 17460 return mMinHeight; 17461 } 17462 17463 /** 17464 * Sets the minimum height of the view. It is not guaranteed the view will 17465 * be able to achieve this minimum height (for example, if its parent layout 17466 * constrains it with less available height). 17467 * 17468 * @param minHeight The minimum height the view will try to be. 17469 * 17470 * @see #getMinimumHeight() 17471 * 17472 * @attr ref android.R.styleable#View_minHeight 17473 */ 17474 public void setMinimumHeight(int minHeight) { 17475 mMinHeight = minHeight; 17476 requestLayout(); 17477 } 17478 17479 /** 17480 * Returns the minimum width of the view. 17481 * 17482 * @return the minimum width the view will try to be. 17483 * 17484 * @see #setMinimumWidth(int) 17485 * 17486 * @attr ref android.R.styleable#View_minWidth 17487 */ 17488 public int getMinimumWidth() { 17489 return mMinWidth; 17490 } 17491 17492 /** 17493 * Sets the minimum width of the view. It is not guaranteed the view will 17494 * be able to achieve this minimum width (for example, if its parent layout 17495 * constrains it with less available width). 17496 * 17497 * @param minWidth The minimum width the view will try to be. 17498 * 17499 * @see #getMinimumWidth() 17500 * 17501 * @attr ref android.R.styleable#View_minWidth 17502 */ 17503 public void setMinimumWidth(int minWidth) { 17504 mMinWidth = minWidth; 17505 requestLayout(); 17506 17507 } 17508 17509 /** 17510 * Get the animation currently associated with this view. 17511 * 17512 * @return The animation that is currently playing or 17513 * scheduled to play for this view. 17514 */ 17515 public Animation getAnimation() { 17516 return mCurrentAnimation; 17517 } 17518 17519 /** 17520 * Start the specified animation now. 17521 * 17522 * @param animation the animation to start now 17523 */ 17524 public void startAnimation(Animation animation) { 17525 animation.setStartTime(Animation.START_ON_FIRST_FRAME); 17526 setAnimation(animation); 17527 invalidateParentCaches(); 17528 invalidate(true); 17529 } 17530 17531 /** 17532 * Cancels any animations for this view. 17533 */ 17534 public void clearAnimation() { 17535 if (mCurrentAnimation != null) { 17536 mCurrentAnimation.detach(); 17537 } 17538 mCurrentAnimation = null; 17539 invalidateParentIfNeeded(); 17540 } 17541 17542 /** 17543 * Sets the next animation to play for this view. 17544 * If you want the animation to play immediately, use 17545 * {@link #startAnimation(android.view.animation.Animation)} instead. 17546 * This method provides allows fine-grained 17547 * control over the start time and invalidation, but you 17548 * must make sure that 1) the animation has a start time set, and 17549 * 2) the view's parent (which controls animations on its children) 17550 * will be invalidated when the animation is supposed to 17551 * start. 17552 * 17553 * @param animation The next animation, or null. 17554 */ 17555 public void setAnimation(Animation animation) { 17556 mCurrentAnimation = animation; 17557 17558 if (animation != null) { 17559 // If the screen is off assume the animation start time is now instead of 17560 // the next frame we draw. Keeping the START_ON_FIRST_FRAME start time 17561 // would cause the animation to start when the screen turns back on 17562 if (mAttachInfo != null && mAttachInfo.mDisplayState == Display.STATE_OFF 17563 && animation.getStartTime() == Animation.START_ON_FIRST_FRAME) { 17564 animation.setStartTime(AnimationUtils.currentAnimationTimeMillis()); 17565 } 17566 animation.reset(); 17567 } 17568 } 17569 17570 /** 17571 * Invoked by a parent ViewGroup to notify the start of the animation 17572 * currently associated with this view. If you override this method, 17573 * always call super.onAnimationStart(); 17574 * 17575 * @see #setAnimation(android.view.animation.Animation) 17576 * @see #getAnimation() 17577 */ 17578 protected void onAnimationStart() { 17579 mPrivateFlags |= PFLAG_ANIMATION_STARTED; 17580 } 17581 17582 /** 17583 * Invoked by a parent ViewGroup to notify the end of the animation 17584 * currently associated with this view. If you override this method, 17585 * always call super.onAnimationEnd(); 17586 * 17587 * @see #setAnimation(android.view.animation.Animation) 17588 * @see #getAnimation() 17589 */ 17590 protected void onAnimationEnd() { 17591 mPrivateFlags &= ~PFLAG_ANIMATION_STARTED; 17592 } 17593 17594 /** 17595 * Invoked if there is a Transform that involves alpha. Subclass that can 17596 * draw themselves with the specified alpha should return true, and then 17597 * respect that alpha when their onDraw() is called. If this returns false 17598 * then the view may be redirected to draw into an offscreen buffer to 17599 * fulfill the request, which will look fine, but may be slower than if the 17600 * subclass handles it internally. The default implementation returns false. 17601 * 17602 * @param alpha The alpha (0..255) to apply to the view's drawing 17603 * @return true if the view can draw with the specified alpha. 17604 */ 17605 protected boolean onSetAlpha(int alpha) { 17606 return false; 17607 } 17608 17609 /** 17610 * This is used by the RootView to perform an optimization when 17611 * the view hierarchy contains one or several SurfaceView. 17612 * SurfaceView is always considered transparent, but its children are not, 17613 * therefore all View objects remove themselves from the global transparent 17614 * region (passed as a parameter to this function). 17615 * 17616 * @param region The transparent region for this ViewAncestor (window). 17617 * 17618 * @return Returns true if the effective visibility of the view at this 17619 * point is opaque, regardless of the transparent region; returns false 17620 * if it is possible for underlying windows to be seen behind the view. 17621 * 17622 * {@hide} 17623 */ 17624 public boolean gatherTransparentRegion(Region region) { 17625 final AttachInfo attachInfo = mAttachInfo; 17626 if (region != null && attachInfo != null) { 17627 final int pflags = mPrivateFlags; 17628 if ((pflags & PFLAG_SKIP_DRAW) == 0) { 17629 // The SKIP_DRAW flag IS NOT set, so this view draws. We need to 17630 // remove it from the transparent region. 17631 final int[] location = attachInfo.mTransparentLocation; 17632 getLocationInWindow(location); 17633 region.op(location[0], location[1], location[0] + mRight - mLeft, 17634 location[1] + mBottom - mTop, Region.Op.DIFFERENCE); 17635 } else if ((pflags & PFLAG_ONLY_DRAWS_BACKGROUND) != 0 && mBackground != null && 17636 mBackground.getOpacity() != PixelFormat.TRANSPARENT) { 17637 // The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable 17638 // exists, so we remove the background drawable's non-transparent 17639 // parts from this transparent region. 17640 applyDrawableToTransparentRegion(mBackground, region); 17641 } 17642 } 17643 return true; 17644 } 17645 17646 /** 17647 * Play a sound effect for this view. 17648 * 17649 * <p>The framework will play sound effects for some built in actions, such as 17650 * clicking, but you may wish to play these effects in your widget, 17651 * for instance, for internal navigation. 17652 * 17653 * <p>The sound effect will only be played if sound effects are enabled by the user, and 17654 * {@link #isSoundEffectsEnabled()} is true. 17655 * 17656 * @param soundConstant One of the constants defined in {@link SoundEffectConstants} 17657 */ 17658 public void playSoundEffect(int soundConstant) { 17659 if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { 17660 return; 17661 } 17662 mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); 17663 } 17664 17665 /** 17666 * BZZZTT!!1! 17667 * 17668 * <p>Provide haptic feedback to the user for this view. 17669 * 17670 * <p>The framework will provide haptic feedback for some built in actions, 17671 * such as long presses, but you may wish to provide feedback for your 17672 * own widget. 17673 * 17674 * <p>The feedback will only be performed if 17675 * {@link #isHapticFeedbackEnabled()} is true. 17676 * 17677 * @param feedbackConstant One of the constants defined in 17678 * {@link HapticFeedbackConstants} 17679 */ 17680 public boolean performHapticFeedback(int feedbackConstant) { 17681 return performHapticFeedback(feedbackConstant, 0); 17682 } 17683 17684 /** 17685 * BZZZTT!!1! 17686 * 17687 * <p>Like {@link #performHapticFeedback(int)}, with additional options. 17688 * 17689 * @param feedbackConstant One of the constants defined in 17690 * {@link HapticFeedbackConstants} 17691 * @param flags Additional flags as per {@link HapticFeedbackConstants}. 17692 */ 17693 public boolean performHapticFeedback(int feedbackConstant, int flags) { 17694 if (mAttachInfo == null) { 17695 return false; 17696 } 17697 //noinspection SimplifiableIfStatement 17698 if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 17699 && !isHapticFeedbackEnabled()) { 17700 return false; 17701 } 17702 return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, 17703 (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); 17704 } 17705 17706 /** 17707 * Request that the visibility of the status bar or other screen/window 17708 * decorations be changed. 17709 * 17710 * <p>This method is used to put the over device UI into temporary modes 17711 * where the user's attention is focused more on the application content, 17712 * by dimming or hiding surrounding system affordances. This is typically 17713 * used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY 17714 * Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content 17715 * to be placed behind the action bar (and with these flags other system 17716 * affordances) so that smooth transitions between hiding and showing them 17717 * can be done. 17718 * 17719 * <p>Two representative examples of the use of system UI visibility is 17720 * implementing a content browsing application (like a magazine reader) 17721 * and a video playing application. 17722 * 17723 * <p>The first code shows a typical implementation of a View in a content 17724 * browsing application. In this implementation, the application goes 17725 * into a content-oriented mode by hiding the status bar and action bar, 17726 * and putting the navigation elements into lights out mode. The user can 17727 * then interact with content while in this mode. Such an application should 17728 * provide an easy way for the user to toggle out of the mode (such as to 17729 * check information in the status bar or access notifications). In the 17730 * implementation here, this is done simply by tapping on the content. 17731 * 17732 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java 17733 * content} 17734 * 17735 * <p>This second code sample shows a typical implementation of a View 17736 * in a video playing application. In this situation, while the video is 17737 * playing the application would like to go into a complete full-screen mode, 17738 * to use as much of the display as possible for the video. When in this state 17739 * the user can not interact with the application; the system intercepts 17740 * touching on the screen to pop the UI out of full screen mode. See 17741 * {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code. 17742 * 17743 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java 17744 * content} 17745 * 17746 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 17747 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 17748 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 17749 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 17750 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 17751 */ 17752 public void setSystemUiVisibility(int visibility) { 17753 if (visibility != mSystemUiVisibility) { 17754 mSystemUiVisibility = visibility; 17755 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 17756 mParent.recomputeViewAttributes(this); 17757 } 17758 } 17759 } 17760 17761 /** 17762 * Returns the last {@link #setSystemUiVisibility(int)} that this view has requested. 17763 * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 17764 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 17765 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 17766 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 17767 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 17768 */ 17769 public int getSystemUiVisibility() { 17770 return mSystemUiVisibility; 17771 } 17772 17773 /** 17774 * Returns the current system UI visibility that is currently set for 17775 * the entire window. This is the combination of the 17776 * {@link #setSystemUiVisibility(int)} values supplied by all of the 17777 * views in the window. 17778 */ 17779 public int getWindowSystemUiVisibility() { 17780 return mAttachInfo != null ? mAttachInfo.mSystemUiVisibility : 0; 17781 } 17782 17783 /** 17784 * Override to find out when the window's requested system UI visibility 17785 * has changed, that is the value returned by {@link #getWindowSystemUiVisibility()}. 17786 * This is different from the callbacks received through 17787 * {@link #setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener)} 17788 * in that this is only telling you about the local request of the window, 17789 * not the actual values applied by the system. 17790 */ 17791 public void onWindowSystemUiVisibilityChanged(int visible) { 17792 } 17793 17794 /** 17795 * Dispatch callbacks to {@link #onWindowSystemUiVisibilityChanged(int)} down 17796 * the view hierarchy. 17797 */ 17798 public void dispatchWindowSystemUiVisiblityChanged(int visible) { 17799 onWindowSystemUiVisibilityChanged(visible); 17800 } 17801 17802 /** 17803 * Set a listener to receive callbacks when the visibility of the system bar changes. 17804 * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. 17805 */ 17806 public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { 17807 getListenerInfo().mOnSystemUiVisibilityChangeListener = l; 17808 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 17809 mParent.recomputeViewAttributes(this); 17810 } 17811 } 17812 17813 /** 17814 * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down 17815 * the view hierarchy. 17816 */ 17817 public void dispatchSystemUiVisibilityChanged(int visibility) { 17818 ListenerInfo li = mListenerInfo; 17819 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 17820 li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( 17821 visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); 17822 } 17823 } 17824 17825 boolean updateLocalSystemUiVisibility(int localValue, int localChanges) { 17826 int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); 17827 if (val != mSystemUiVisibility) { 17828 setSystemUiVisibility(val); 17829 return true; 17830 } 17831 return false; 17832 } 17833 17834 /** @hide */ 17835 public void setDisabledSystemUiVisibility(int flags) { 17836 if (mAttachInfo != null) { 17837 if (mAttachInfo.mDisabledSystemUiVisibility != flags) { 17838 mAttachInfo.mDisabledSystemUiVisibility = flags; 17839 if (mParent != null) { 17840 mParent.recomputeViewAttributes(this); 17841 } 17842 } 17843 } 17844 } 17845 17846 /** 17847 * Creates an image that the system displays during the drag and drop 17848 * operation. This is called a "drag shadow". The default implementation 17849 * for a DragShadowBuilder based on a View returns an image that has exactly the same 17850 * appearance as the given View. The default also positions the center of the drag shadow 17851 * directly under the touch point. If no View is provided (the constructor with no parameters 17852 * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and 17853 * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overriden, then the 17854 * default is an invisible drag shadow. 17855 * <p> 17856 * You are not required to use the View you provide to the constructor as the basis of the 17857 * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw 17858 * anything you want as the drag shadow. 17859 * </p> 17860 * <p> 17861 * You pass a DragShadowBuilder object to the system when you start the drag. The system 17862 * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the 17863 * size and position of the drag shadow. It uses this data to construct a 17864 * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} 17865 * so that your application can draw the shadow image in the Canvas. 17866 * </p> 17867 * 17868 * <div class="special reference"> 17869 * <h3>Developer Guides</h3> 17870 * <p>For a guide to implementing drag and drop features, read the 17871 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 17872 * </div> 17873 */ 17874 public static class DragShadowBuilder { 17875 private final WeakReference<View> mView; 17876 17877 /** 17878 * Constructs a shadow image builder based on a View. By default, the resulting drag 17879 * shadow will have the same appearance and dimensions as the View, with the touch point 17880 * over the center of the View. 17881 * @param view A View. Any View in scope can be used. 17882 */ 17883 public DragShadowBuilder(View view) { 17884 mView = new WeakReference<View>(view); 17885 } 17886 17887 /** 17888 * Construct a shadow builder object with no associated View. This 17889 * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} 17890 * and {@link #onDrawShadow(Canvas)} methods are also overridden in order 17891 * to supply the drag shadow's dimensions and appearance without 17892 * reference to any View object. If they are not overridden, then the result is an 17893 * invisible drag shadow. 17894 */ 17895 public DragShadowBuilder() { 17896 mView = new WeakReference<View>(null); 17897 } 17898 17899 /** 17900 * Returns the View object that had been passed to the 17901 * {@link #View.DragShadowBuilder(View)} 17902 * constructor. If that View parameter was {@code null} or if the 17903 * {@link #View.DragShadowBuilder()} 17904 * constructor was used to instantiate the builder object, this method will return 17905 * null. 17906 * 17907 * @return The View object associate with this builder object. 17908 */ 17909 @SuppressWarnings({"JavadocReference"}) 17910 final public View getView() { 17911 return mView.get(); 17912 } 17913 17914 /** 17915 * Provides the metrics for the shadow image. These include the dimensions of 17916 * the shadow image, and the point within that shadow that should 17917 * be centered under the touch location while dragging. 17918 * <p> 17919 * The default implementation sets the dimensions of the shadow to be the 17920 * same as the dimensions of the View itself and centers the shadow under 17921 * the touch point. 17922 * </p> 17923 * 17924 * @param shadowSize A {@link android.graphics.Point} containing the width and height 17925 * of the shadow image. Your application must set {@link android.graphics.Point#x} to the 17926 * desired width and must set {@link android.graphics.Point#y} to the desired height of the 17927 * image. 17928 * 17929 * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the 17930 * shadow image that should be underneath the touch point during the drag and drop 17931 * operation. Your application must set {@link android.graphics.Point#x} to the 17932 * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. 17933 */ 17934 public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 17935 final View view = mView.get(); 17936 if (view != null) { 17937 shadowSize.set(view.getWidth(), view.getHeight()); 17938 shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); 17939 } else { 17940 Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); 17941 } 17942 } 17943 17944 /** 17945 * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object 17946 * based on the dimensions it received from the 17947 * {@link #onProvideShadowMetrics(Point, Point)} callback. 17948 * 17949 * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. 17950 */ 17951 public void onDrawShadow(Canvas canvas) { 17952 final View view = mView.get(); 17953 if (view != null) { 17954 view.draw(canvas); 17955 } else { 17956 Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); 17957 } 17958 } 17959 } 17960 17961 /** 17962 * Starts a drag and drop operation. When your application calls this method, it passes a 17963 * {@link android.view.View.DragShadowBuilder} object to the system. The 17964 * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} 17965 * to get metrics for the drag shadow, and then calls the object's 17966 * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. 17967 * <p> 17968 * Once the system has the drag shadow, it begins the drag and drop operation by sending 17969 * drag events to all the View objects in your application that are currently visible. It does 17970 * this either by calling the View object's drag listener (an implementation of 17971 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the 17972 * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. 17973 * Both are passed a {@link android.view.DragEvent} object that has a 17974 * {@link android.view.DragEvent#getAction()} value of 17975 * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. 17976 * </p> 17977 * <p> 17978 * Your application can invoke startDrag() on any attached View object. The View object does not 17979 * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to 17980 * be related to the View the user selected for dragging. 17981 * </p> 17982 * @param data A {@link android.content.ClipData} object pointing to the data to be 17983 * transferred by the drag and drop operation. 17984 * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the 17985 * drag shadow. 17986 * @param myLocalState An {@link java.lang.Object} containing local data about the drag and 17987 * drop operation. This Object is put into every DragEvent object sent by the system during the 17988 * current drag. 17989 * <p> 17990 * myLocalState is a lightweight mechanism for the sending information from the dragged View 17991 * to the target Views. For example, it can contain flags that differentiate between a 17992 * a copy operation and a move operation. 17993 * </p> 17994 * @param flags Flags that control the drag and drop operation. No flags are currently defined, 17995 * so the parameter should be set to 0. 17996 * @return {@code true} if the method completes successfully, or 17997 * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to 17998 * do a drag, and so no drag operation is in progress. 17999 */ 18000 public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, 18001 Object myLocalState, int flags) { 18002 if (ViewDebug.DEBUG_DRAG) { 18003 Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); 18004 } 18005 boolean okay = false; 18006 18007 Point shadowSize = new Point(); 18008 Point shadowTouchPoint = new Point(); 18009 shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); 18010 18011 if ((shadowSize.x < 0) || (shadowSize.y < 0) || 18012 (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { 18013 throw new IllegalStateException("Drag shadow dimensions must not be negative"); 18014 } 18015 18016 if (ViewDebug.DEBUG_DRAG) { 18017 Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y 18018 + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); 18019 } 18020 Surface surface = new Surface(); 18021 try { 18022 IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, 18023 flags, shadowSize.x, shadowSize.y, surface); 18024 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token 18025 + " surface=" + surface); 18026 if (token != null) { 18027 Canvas canvas = surface.lockCanvas(null); 18028 try { 18029 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 18030 shadowBuilder.onDrawShadow(canvas); 18031 } finally { 18032 surface.unlockCanvasAndPost(canvas); 18033 } 18034 18035 final ViewRootImpl root = getViewRootImpl(); 18036 18037 // Cache the local state object for delivery with DragEvents 18038 root.setLocalDragState(myLocalState); 18039 18040 // repurpose 'shadowSize' for the last touch point 18041 root.getLastTouchPoint(shadowSize); 18042 18043 okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, 18044 shadowSize.x, shadowSize.y, 18045 shadowTouchPoint.x, shadowTouchPoint.y, data); 18046 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); 18047 18048 // Off and running! Release our local surface instance; the drag 18049 // shadow surface is now managed by the system process. 18050 surface.release(); 18051 } 18052 } catch (Exception e) { 18053 Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); 18054 surface.destroy(); 18055 } 18056 18057 return okay; 18058 } 18059 18060 /** 18061 * Handles drag events sent by the system following a call to 18062 * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. 18063 *<p> 18064 * When the system calls this method, it passes a 18065 * {@link android.view.DragEvent} object. A call to 18066 * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined 18067 * in DragEvent. The method uses these to determine what is happening in the drag and drop 18068 * operation. 18069 * @param event The {@link android.view.DragEvent} sent by the system. 18070 * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined 18071 * in DragEvent, indicating the type of drag event represented by this object. 18072 * @return {@code true} if the method was successful, otherwise {@code false}. 18073 * <p> 18074 * The method should return {@code true} in response to an action type of 18075 * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current 18076 * operation. 18077 * </p> 18078 * <p> 18079 * The method should also return {@code true} in response to an action type of 18080 * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or 18081 * {@code false} if it didn't. 18082 * </p> 18083 */ 18084 public boolean onDragEvent(DragEvent event) { 18085 return false; 18086 } 18087 18088 /** 18089 * Detects if this View is enabled and has a drag event listener. 18090 * If both are true, then it calls the drag event listener with the 18091 * {@link android.view.DragEvent} it received. If the drag event listener returns 18092 * {@code true}, then dispatchDragEvent() returns {@code true}. 18093 * <p> 18094 * For all other cases, the method calls the 18095 * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler 18096 * method and returns its result. 18097 * </p> 18098 * <p> 18099 * This ensures that a drag event is always consumed, even if the View does not have a drag 18100 * event listener. However, if the View has a listener and the listener returns true, then 18101 * onDragEvent() is not called. 18102 * </p> 18103 */ 18104 public boolean dispatchDragEvent(DragEvent event) { 18105 ListenerInfo li = mListenerInfo; 18106 //noinspection SimplifiableIfStatement 18107 if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 18108 && li.mOnDragListener.onDrag(this, event)) { 18109 return true; 18110 } 18111 return onDragEvent(event); 18112 } 18113 18114 boolean canAcceptDrag() { 18115 return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0; 18116 } 18117 18118 /** 18119 * This needs to be a better API (NOT ON VIEW) before it is exposed. If 18120 * it is ever exposed at all. 18121 * @hide 18122 */ 18123 public void onCloseSystemDialogs(String reason) { 18124 } 18125 18126 /** 18127 * Given a Drawable whose bounds have been set to draw into this view, 18128 * update a Region being computed for 18129 * {@link #gatherTransparentRegion(android.graphics.Region)} so 18130 * that any non-transparent parts of the Drawable are removed from the 18131 * given transparent region. 18132 * 18133 * @param dr The Drawable whose transparency is to be applied to the region. 18134 * @param region A Region holding the current transparency information, 18135 * where any parts of the region that are set are considered to be 18136 * transparent. On return, this region will be modified to have the 18137 * transparency information reduced by the corresponding parts of the 18138 * Drawable that are not transparent. 18139 * {@hide} 18140 */ 18141 public void applyDrawableToTransparentRegion(Drawable dr, Region region) { 18142 if (DBG) { 18143 Log.i("View", "Getting transparent region for: " + this); 18144 } 18145 final Region r = dr.getTransparentRegion(); 18146 final Rect db = dr.getBounds(); 18147 final AttachInfo attachInfo = mAttachInfo; 18148 if (r != null && attachInfo != null) { 18149 final int w = getRight()-getLeft(); 18150 final int h = getBottom()-getTop(); 18151 if (db.left > 0) { 18152 //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); 18153 r.op(0, 0, db.left, h, Region.Op.UNION); 18154 } 18155 if (db.right < w) { 18156 //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); 18157 r.op(db.right, 0, w, h, Region.Op.UNION); 18158 } 18159 if (db.top > 0) { 18160 //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); 18161 r.op(0, 0, w, db.top, Region.Op.UNION); 18162 } 18163 if (db.bottom < h) { 18164 //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); 18165 r.op(0, db.bottom, w, h, Region.Op.UNION); 18166 } 18167 final int[] location = attachInfo.mTransparentLocation; 18168 getLocationInWindow(location); 18169 r.translate(location[0], location[1]); 18170 region.op(r, Region.Op.INTERSECT); 18171 } else { 18172 region.op(db, Region.Op.DIFFERENCE); 18173 } 18174 } 18175 18176 private void checkForLongClick(int delayOffset) { 18177 if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { 18178 mHasPerformedLongPress = false; 18179 18180 if (mPendingCheckForLongPress == null) { 18181 mPendingCheckForLongPress = new CheckForLongPress(); 18182 } 18183 mPendingCheckForLongPress.rememberWindowAttachCount(); 18184 postDelayed(mPendingCheckForLongPress, 18185 ViewConfiguration.getLongPressTimeout() - delayOffset); 18186 } 18187 } 18188 18189 /** 18190 * Inflate a view from an XML resource. This convenience method wraps the {@link 18191 * LayoutInflater} class, which provides a full range of options for view inflation. 18192 * 18193 * @param context The Context object for your activity or application. 18194 * @param resource The resource ID to inflate 18195 * @param root A view group that will be the parent. Used to properly inflate the 18196 * layout_* parameters. 18197 * @see LayoutInflater 18198 */ 18199 public static View inflate(Context context, int resource, ViewGroup root) { 18200 LayoutInflater factory = LayoutInflater.from(context); 18201 return factory.inflate(resource, root); 18202 } 18203 18204 /** 18205 * Scroll the view with standard behavior for scrolling beyond the normal 18206 * content boundaries. Views that call this method should override 18207 * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the 18208 * results of an over-scroll operation. 18209 * 18210 * Views can use this method to handle any touch or fling-based scrolling. 18211 * 18212 * @param deltaX Change in X in pixels 18213 * @param deltaY Change in Y in pixels 18214 * @param scrollX Current X scroll value in pixels before applying deltaX 18215 * @param scrollY Current Y scroll value in pixels before applying deltaY 18216 * @param scrollRangeX Maximum content scroll range along the X axis 18217 * @param scrollRangeY Maximum content scroll range along the Y axis 18218 * @param maxOverScrollX Number of pixels to overscroll by in either direction 18219 * along the X axis. 18220 * @param maxOverScrollY Number of pixels to overscroll by in either direction 18221 * along the Y axis. 18222 * @param isTouchEvent true if this scroll operation is the result of a touch event. 18223 * @return true if scrolling was clamped to an over-scroll boundary along either 18224 * axis, false otherwise. 18225 */ 18226 @SuppressWarnings({"UnusedParameters"}) 18227 protected boolean overScrollBy(int deltaX, int deltaY, 18228 int scrollX, int scrollY, 18229 int scrollRangeX, int scrollRangeY, 18230 int maxOverScrollX, int maxOverScrollY, 18231 boolean isTouchEvent) { 18232 final int overScrollMode = mOverScrollMode; 18233 final boolean canScrollHorizontal = 18234 computeHorizontalScrollRange() > computeHorizontalScrollExtent(); 18235 final boolean canScrollVertical = 18236 computeVerticalScrollRange() > computeVerticalScrollExtent(); 18237 final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || 18238 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); 18239 final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || 18240 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); 18241 18242 int newScrollX = scrollX + deltaX; 18243 if (!overScrollHorizontal) { 18244 maxOverScrollX = 0; 18245 } 18246 18247 int newScrollY = scrollY + deltaY; 18248 if (!overScrollVertical) { 18249 maxOverScrollY = 0; 18250 } 18251 18252 // Clamp values if at the limits and record 18253 final int left = -maxOverScrollX; 18254 final int right = maxOverScrollX + scrollRangeX; 18255 final int top = -maxOverScrollY; 18256 final int bottom = maxOverScrollY + scrollRangeY; 18257 18258 boolean clampedX = false; 18259 if (newScrollX > right) { 18260 newScrollX = right; 18261 clampedX = true; 18262 } else if (newScrollX < left) { 18263 newScrollX = left; 18264 clampedX = true; 18265 } 18266 18267 boolean clampedY = false; 18268 if (newScrollY > bottom) { 18269 newScrollY = bottom; 18270 clampedY = true; 18271 } else if (newScrollY < top) { 18272 newScrollY = top; 18273 clampedY = true; 18274 } 18275 18276 onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); 18277 18278 return clampedX || clampedY; 18279 } 18280 18281 /** 18282 * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to 18283 * respond to the results of an over-scroll operation. 18284 * 18285 * @param scrollX New X scroll value in pixels 18286 * @param scrollY New Y scroll value in pixels 18287 * @param clampedX True if scrollX was clamped to an over-scroll boundary 18288 * @param clampedY True if scrollY was clamped to an over-scroll boundary 18289 */ 18290 protected void onOverScrolled(int scrollX, int scrollY, 18291 boolean clampedX, boolean clampedY) { 18292 // Intentionally empty. 18293 } 18294 18295 /** 18296 * Returns the over-scroll mode for this view. The result will be 18297 * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 18298 * (allow over-scrolling only if the view content is larger than the container), 18299 * or {@link #OVER_SCROLL_NEVER}. 18300 * 18301 * @return This view's over-scroll mode. 18302 */ 18303 public int getOverScrollMode() { 18304 return mOverScrollMode; 18305 } 18306 18307 /** 18308 * Set the over-scroll mode for this view. Valid over-scroll modes are 18309 * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 18310 * (allow over-scrolling only if the view content is larger than the container), 18311 * or {@link #OVER_SCROLL_NEVER}. 18312 * 18313 * Setting the over-scroll mode of a view will have an effect only if the 18314 * view is capable of scrolling. 18315 * 18316 * @param overScrollMode The new over-scroll mode for this view. 18317 */ 18318 public void setOverScrollMode(int overScrollMode) { 18319 if (overScrollMode != OVER_SCROLL_ALWAYS && 18320 overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && 18321 overScrollMode != OVER_SCROLL_NEVER) { 18322 throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); 18323 } 18324 mOverScrollMode = overScrollMode; 18325 } 18326 18327 /** 18328 * Enable or disable nested scrolling for this view. 18329 * 18330 * <p>If this property is set to true the view will be permitted to initiate nested 18331 * scrolling operations with a compatible parent view in the current hierarchy. If this 18332 * view does not implement nested scrolling this will have no effect. Disabling nested scrolling 18333 * while a nested scroll is in progress has the effect of {@link #stopNestedScroll() stopping} 18334 * the nested scroll.</p> 18335 * 18336 * @param enabled true to enable nested scrolling, false to disable 18337 * 18338 * @see #isNestedScrollingEnabled() 18339 */ 18340 public void setNestedScrollingEnabled(boolean enabled) { 18341 if (enabled) { 18342 mPrivateFlags3 |= PFLAG3_NESTED_SCROLLING_ENABLED; 18343 } else { 18344 stopNestedScroll(); 18345 mPrivateFlags3 &= ~PFLAG3_NESTED_SCROLLING_ENABLED; 18346 } 18347 } 18348 18349 /** 18350 * Returns true if nested scrolling is enabled for this view. 18351 * 18352 * <p>If nested scrolling is enabled and this View class implementation supports it, 18353 * this view will act as a nested scrolling child view when applicable, forwarding data 18354 * about the scroll operation in progress to a compatible and cooperating nested scrolling 18355 * parent.</p> 18356 * 18357 * @return true if nested scrolling is enabled 18358 * 18359 * @see #setNestedScrollingEnabled(boolean) 18360 */ 18361 public boolean isNestedScrollingEnabled() { 18362 return (mPrivateFlags3 & PFLAG3_NESTED_SCROLLING_ENABLED) == 18363 PFLAG3_NESTED_SCROLLING_ENABLED; 18364 } 18365 18366 /** 18367 * Begin a nestable scroll operation along the given axes. 18368 * 18369 * <p>A view starting a nested scroll promises to abide by the following contract:</p> 18370 * 18371 * <p>The view will call startNestedScroll upon initiating a scroll operation. In the case 18372 * of a touch scroll this corresponds to the initial {@link MotionEvent#ACTION_DOWN}. 18373 * In the case of touch scrolling the nested scroll will be terminated automatically in 18374 * the same manner as {@link ViewParent#requestDisallowInterceptTouchEvent(boolean)}. 18375 * In the event of programmatic scrolling the caller must explicitly call 18376 * {@link #stopNestedScroll()} to indicate the end of the nested scroll.</p> 18377 * 18378 * <p>If <code>startNestedScroll</code> returns true, a cooperative parent was found. 18379 * If it returns false the caller may ignore the rest of this contract until the next scroll. 18380 * Calling startNestedScroll while a nested scroll is already in progress will return true.</p> 18381 * 18382 * <p>At each incremental step of the scroll the caller should invoke 18383 * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} 18384 * once it has calculated the requested scrolling delta. If it returns true the nested scrolling 18385 * parent at least partially consumed the scroll and the caller should adjust the amount it 18386 * scrolls by.</p> 18387 * 18388 * <p>After applying the remainder of the scroll delta the caller should invoke 18389 * {@link #dispatchNestedScroll(int, int, int, int, int[]) dispatchNestedScroll}, passing 18390 * both the delta consumed and the delta unconsumed. A nested scrolling parent may treat 18391 * these values differently. See {@link ViewParent#onNestedScroll(View, int, int, int, int)}. 18392 * </p> 18393 * 18394 * @param axes Flags consisting of a combination of {@link #SCROLL_AXIS_HORIZONTAL} and/or 18395 * {@link #SCROLL_AXIS_VERTICAL}. 18396 * @return true if a cooperative parent was found and nested scrolling has been enabled for 18397 * the current gesture. 18398 * 18399 * @see #stopNestedScroll() 18400 * @see #dispatchNestedPreScroll(int, int, int[], int[]) 18401 * @see #dispatchNestedScroll(int, int, int, int, int[]) 18402 */ 18403 public boolean startNestedScroll(int axes) { 18404 if (hasNestedScrollingParent()) { 18405 // Already in progress 18406 return true; 18407 } 18408 if (isNestedScrollingEnabled()) { 18409 ViewParent p = getParent(); 18410 View child = this; 18411 while (p != null) { 18412 try { 18413 if (p.onStartNestedScroll(child, this, axes)) { 18414 mNestedScrollingParent = p; 18415 p.onNestedScrollAccepted(child, this, axes); 18416 return true; 18417 } 18418 } catch (AbstractMethodError e) { 18419 Log.e(VIEW_LOG_TAG, "ViewParent " + p + " does not implement interface " + 18420 "method onStartNestedScroll", e); 18421 // Allow the search upward to continue 18422 } 18423 if (p instanceof View) { 18424 child = (View) p; 18425 } 18426 p = p.getParent(); 18427 } 18428 } 18429 return false; 18430 } 18431 18432 /** 18433 * Stop a nested scroll in progress. 18434 * 18435 * <p>Calling this method when a nested scroll is not currently in progress is harmless.</p> 18436 * 18437 * @see #startNestedScroll(int) 18438 */ 18439 public void stopNestedScroll() { 18440 if (mNestedScrollingParent != null) { 18441 mNestedScrollingParent.onStopNestedScroll(this); 18442 mNestedScrollingParent = null; 18443 } 18444 } 18445 18446 /** 18447 * Returns true if this view has a nested scrolling parent. 18448 * 18449 * <p>The presence of a nested scrolling parent indicates that this view has initiated 18450 * a nested scroll and it was accepted by an ancestor view further up the view hierarchy.</p> 18451 * 18452 * @return whether this view has a nested scrolling parent 18453 */ 18454 public boolean hasNestedScrollingParent() { 18455 return mNestedScrollingParent != null; 18456 } 18457 18458 /** 18459 * Dispatch one step of a nested scroll in progress. 18460 * 18461 * <p>Implementations of views that support nested scrolling should call this to report 18462 * info about a scroll in progress to the current nested scrolling parent. If a nested scroll 18463 * is not currently in progress or nested scrolling is not 18464 * {@link #isNestedScrollingEnabled() enabled} for this view this method does nothing.</p> 18465 * 18466 * <p>Compatible View implementations should also call 18467 * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} before 18468 * consuming a component of the scroll event themselves.</p> 18469 * 18470 * @param dxConsumed Horizontal distance in pixels consumed by this view during this scroll step 18471 * @param dyConsumed Vertical distance in pixels consumed by this view during this scroll step 18472 * @param dxUnconsumed Horizontal scroll distance in pixels not consumed by this view 18473 * @param dyUnconsumed Horizontal scroll distance in pixels not consumed by this view 18474 * @param offsetInWindow Optional. If not null, on return this will contain the offset 18475 * in local view coordinates of this view from before this operation 18476 * to after it completes. View implementations may use this to adjust 18477 * expected input coordinate tracking. 18478 * @return true if the event was dispatched, false if it could not be dispatched. 18479 * @see #dispatchNestedPreScroll(int, int, int[], int[]) 18480 */ 18481 public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, 18482 int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow) { 18483 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 18484 if (dxConsumed != 0 || dyConsumed != 0 || dxUnconsumed != 0 || dyUnconsumed != 0) { 18485 int startX = 0; 18486 int startY = 0; 18487 if (offsetInWindow != null) { 18488 getLocationInWindow(offsetInWindow); 18489 startX = offsetInWindow[0]; 18490 startY = offsetInWindow[1]; 18491 } 18492 18493 mNestedScrollingParent.onNestedScroll(this, dxConsumed, dyConsumed, 18494 dxUnconsumed, dyUnconsumed); 18495 18496 if (offsetInWindow != null) { 18497 getLocationInWindow(offsetInWindow); 18498 offsetInWindow[0] -= startX; 18499 offsetInWindow[1] -= startY; 18500 } 18501 return true; 18502 } else if (offsetInWindow != null) { 18503 // No motion, no dispatch. Keep offsetInWindow up to date. 18504 offsetInWindow[0] = 0; 18505 offsetInWindow[1] = 0; 18506 } 18507 } 18508 return false; 18509 } 18510 18511 /** 18512 * Dispatch one step of a nested scroll in progress before this view consumes any portion of it. 18513 * 18514 * <p>Nested pre-scroll events are to nested scroll events what touch intercept is to touch. 18515 * <code>dispatchNestedPreScroll</code> offers an opportunity for the parent view in a nested 18516 * scrolling operation to consume some or all of the scroll operation before the child view 18517 * consumes it.</p> 18518 * 18519 * @param dx Horizontal scroll distance in pixels 18520 * @param dy Vertical scroll distance in pixels 18521 * @param consumed Output. If not null, consumed[0] will contain the consumed component of dx 18522 * and consumed[1] the consumed dy. 18523 * @param offsetInWindow Optional. If not null, on return this will contain the offset 18524 * in local view coordinates of this view from before this operation 18525 * to after it completes. View implementations may use this to adjust 18526 * expected input coordinate tracking. 18527 * @return true if the parent consumed some or all of the scroll delta 18528 * @see #dispatchNestedScroll(int, int, int, int, int[]) 18529 */ 18530 public boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) { 18531 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 18532 if (dx != 0 || dy != 0) { 18533 int startX = 0; 18534 int startY = 0; 18535 if (offsetInWindow != null) { 18536 getLocationInWindow(offsetInWindow); 18537 startX = offsetInWindow[0]; 18538 startY = offsetInWindow[1]; 18539 } 18540 18541 if (consumed == null) { 18542 if (mTempNestedScrollConsumed == null) { 18543 mTempNestedScrollConsumed = new int[2]; 18544 } 18545 consumed = mTempNestedScrollConsumed; 18546 } 18547 consumed[0] = 0; 18548 consumed[1] = 0; 18549 mNestedScrollingParent.onNestedPreScroll(this, dx, dy, consumed); 18550 18551 if (offsetInWindow != null) { 18552 getLocationInWindow(offsetInWindow); 18553 offsetInWindow[0] -= startX; 18554 offsetInWindow[1] -= startY; 18555 } 18556 return consumed[0] != 0 || consumed[1] != 0; 18557 } else if (offsetInWindow != null) { 18558 offsetInWindow[0] = 0; 18559 offsetInWindow[1] = 0; 18560 } 18561 } 18562 return false; 18563 } 18564 18565 /** 18566 * Dispatch a fling to a nested scrolling parent. 18567 * 18568 * <p>This method should be used to indicate that a nested scrolling child has detected 18569 * suitable conditions for a fling. Generally this means that a touch scroll has ended with a 18570 * {@link VelocityTracker velocity} in the direction of scrolling that meets or exceeds 18571 * the {@link ViewConfiguration#getScaledMinimumFlingVelocity() minimum fling velocity} 18572 * along a scrollable axis.</p> 18573 * 18574 * <p>If a nested scrolling child view would normally fling but it is at the edge of 18575 * its own content, it can use this method to delegate the fling to its nested scrolling 18576 * parent instead. The parent may optionally consume the fling or observe a child fling.</p> 18577 * 18578 * @param velocityX Horizontal fling velocity in pixels per second 18579 * @param velocityY Vertical fling velocity in pixels per second 18580 * @param consumed true if the child consumed the fling, false otherwise 18581 * @return true if the nested scrolling parent consumed or otherwise reacted to the fling 18582 */ 18583 public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) { 18584 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 18585 return mNestedScrollingParent.onNestedFling(this, velocityX, velocityY, consumed); 18586 } 18587 return false; 18588 } 18589 18590 /** 18591 * Dispatch a fling to a nested scrolling parent before it is processed by this view. 18592 * 18593 * <p>Nested pre-fling events are to nested fling events what touch intercept is to touch 18594 * and what nested pre-scroll is to nested scroll. <code>dispatchNestedPreFling</code> 18595 * offsets an opportunity for the parent view in a nested fling to fully consume the fling 18596 * before the child view consumes it. If this method returns <code>true</code>, a nested 18597 * parent view consumed the fling and this view should not scroll as a result.</p> 18598 * 18599 * <p>For a better user experience, only one view in a nested scrolling chain should consume 18600 * the fling at a time. If a parent view consumed the fling this method will return false. 18601 * Custom view implementations should account for this in two ways:</p> 18602 * 18603 * <ul> 18604 * <li>If a custom view is paged and needs to settle to a fixed page-point, do not 18605 * call <code>dispatchNestedPreFling</code>; consume the fling and settle to a valid 18606 * position regardless.</li> 18607 * <li>If a nested parent does consume the fling, this view should not scroll at all, 18608 * even to settle back to a valid idle position.</li> 18609 * </ul> 18610 * 18611 * <p>Views should also not offer fling velocities to nested parent views along an axis 18612 * where scrolling is not currently supported; a {@link android.widget.ScrollView ScrollView} 18613 * should not offer a horizontal fling velocity to its parents since scrolling along that 18614 * axis is not permitted and carrying velocity along that motion does not make sense.</p> 18615 * 18616 * @param velocityX Horizontal fling velocity in pixels per second 18617 * @param velocityY Vertical fling velocity in pixels per second 18618 * @return true if a nested scrolling parent consumed the fling 18619 */ 18620 public boolean dispatchNestedPreFling(float velocityX, float velocityY) { 18621 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 18622 return mNestedScrollingParent.onNestedPreFling(this, velocityX, velocityY); 18623 } 18624 return false; 18625 } 18626 18627 /** 18628 * Gets a scale factor that determines the distance the view should scroll 18629 * vertically in response to {@link MotionEvent#ACTION_SCROLL}. 18630 * @return The vertical scroll scale factor. 18631 * @hide 18632 */ 18633 protected float getVerticalScrollFactor() { 18634 if (mVerticalScrollFactor == 0) { 18635 TypedValue outValue = new TypedValue(); 18636 if (!mContext.getTheme().resolveAttribute( 18637 com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { 18638 throw new IllegalStateException( 18639 "Expected theme to define listPreferredItemHeight."); 18640 } 18641 mVerticalScrollFactor = outValue.getDimension( 18642 mContext.getResources().getDisplayMetrics()); 18643 } 18644 return mVerticalScrollFactor; 18645 } 18646 18647 /** 18648 * Gets a scale factor that determines the distance the view should scroll 18649 * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. 18650 * @return The horizontal scroll scale factor. 18651 * @hide 18652 */ 18653 protected float getHorizontalScrollFactor() { 18654 // TODO: Should use something else. 18655 return getVerticalScrollFactor(); 18656 } 18657 18658 /** 18659 * Return the value specifying the text direction or policy that was set with 18660 * {@link #setTextDirection(int)}. 18661 * 18662 * @return the defined text direction. It can be one of: 18663 * 18664 * {@link #TEXT_DIRECTION_INHERIT}, 18665 * {@link #TEXT_DIRECTION_FIRST_STRONG} 18666 * {@link #TEXT_DIRECTION_ANY_RTL}, 18667 * {@link #TEXT_DIRECTION_LTR}, 18668 * {@link #TEXT_DIRECTION_RTL}, 18669 * {@link #TEXT_DIRECTION_LOCALE} 18670 * 18671 * @attr ref android.R.styleable#View_textDirection 18672 * 18673 * @hide 18674 */ 18675 @ViewDebug.ExportedProperty(category = "text", mapping = { 18676 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 18677 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 18678 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 18679 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 18680 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 18681 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") 18682 }) 18683 public int getRawTextDirection() { 18684 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_MASK) >> PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 18685 } 18686 18687 /** 18688 * Set the text direction. 18689 * 18690 * @param textDirection the direction to set. Should be one of: 18691 * 18692 * {@link #TEXT_DIRECTION_INHERIT}, 18693 * {@link #TEXT_DIRECTION_FIRST_STRONG} 18694 * {@link #TEXT_DIRECTION_ANY_RTL}, 18695 * {@link #TEXT_DIRECTION_LTR}, 18696 * {@link #TEXT_DIRECTION_RTL}, 18697 * {@link #TEXT_DIRECTION_LOCALE} 18698 * 18699 * Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution 18700 * proceeds up the parent chain of the view to get the value. If there is no parent, then it will 18701 * return the default {@link #TEXT_DIRECTION_FIRST_STRONG}. 18702 * 18703 * @attr ref android.R.styleable#View_textDirection 18704 */ 18705 public void setTextDirection(int textDirection) { 18706 if (getRawTextDirection() != textDirection) { 18707 // Reset the current text direction and the resolved one 18708 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 18709 resetResolvedTextDirection(); 18710 // Set the new text direction 18711 mPrivateFlags2 |= ((textDirection << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) & PFLAG2_TEXT_DIRECTION_MASK); 18712 // Do resolution 18713 resolveTextDirection(); 18714 // Notify change 18715 onRtlPropertiesChanged(getLayoutDirection()); 18716 // Refresh 18717 requestLayout(); 18718 invalidate(true); 18719 } 18720 } 18721 18722 /** 18723 * Return the resolved text direction. 18724 * 18725 * @return the resolved text direction. Returns one of: 18726 * 18727 * {@link #TEXT_DIRECTION_FIRST_STRONG} 18728 * {@link #TEXT_DIRECTION_ANY_RTL}, 18729 * {@link #TEXT_DIRECTION_LTR}, 18730 * {@link #TEXT_DIRECTION_RTL}, 18731 * {@link #TEXT_DIRECTION_LOCALE} 18732 * 18733 * @attr ref android.R.styleable#View_textDirection 18734 */ 18735 @ViewDebug.ExportedProperty(category = "text", mapping = { 18736 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 18737 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 18738 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 18739 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 18740 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 18741 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") 18742 }) 18743 public int getTextDirection() { 18744 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED_MASK) >> PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 18745 } 18746 18747 /** 18748 * Resolve the text direction. 18749 * 18750 * @return true if resolution has been done, false otherwise. 18751 * 18752 * @hide 18753 */ 18754 public boolean resolveTextDirection() { 18755 // Reset any previous text direction resolution 18756 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 18757 18758 if (hasRtlSupport()) { 18759 // Set resolved text direction flag depending on text direction flag 18760 final int textDirection = getRawTextDirection(); 18761 switch(textDirection) { 18762 case TEXT_DIRECTION_INHERIT: 18763 if (!canResolveTextDirection()) { 18764 // We cannot do the resolution if there is no parent, so use the default one 18765 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18766 // Resolution will need to happen again later 18767 return false; 18768 } 18769 18770 // Parent has not yet resolved, so we still return the default 18771 try { 18772 if (!mParent.isTextDirectionResolved()) { 18773 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18774 // Resolution will need to happen again later 18775 return false; 18776 } 18777 } catch (AbstractMethodError e) { 18778 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 18779 " does not fully implement ViewParent", e); 18780 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED | 18781 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18782 return true; 18783 } 18784 18785 // Set current resolved direction to the same value as the parent's one 18786 int parentResolvedDirection; 18787 try { 18788 parentResolvedDirection = mParent.getTextDirection(); 18789 } catch (AbstractMethodError e) { 18790 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 18791 " does not fully implement ViewParent", e); 18792 parentResolvedDirection = TEXT_DIRECTION_LTR; 18793 } 18794 switch (parentResolvedDirection) { 18795 case TEXT_DIRECTION_FIRST_STRONG: 18796 case TEXT_DIRECTION_ANY_RTL: 18797 case TEXT_DIRECTION_LTR: 18798 case TEXT_DIRECTION_RTL: 18799 case TEXT_DIRECTION_LOCALE: 18800 mPrivateFlags2 |= 18801 (parentResolvedDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 18802 break; 18803 default: 18804 // Default resolved direction is "first strong" heuristic 18805 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18806 } 18807 break; 18808 case TEXT_DIRECTION_FIRST_STRONG: 18809 case TEXT_DIRECTION_ANY_RTL: 18810 case TEXT_DIRECTION_LTR: 18811 case TEXT_DIRECTION_RTL: 18812 case TEXT_DIRECTION_LOCALE: 18813 // Resolved direction is the same as text direction 18814 mPrivateFlags2 |= (textDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 18815 break; 18816 default: 18817 // Default resolved direction is "first strong" heuristic 18818 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18819 } 18820 } else { 18821 // Default resolved direction is "first strong" heuristic 18822 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18823 } 18824 18825 // Set to resolved 18826 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED; 18827 return true; 18828 } 18829 18830 /** 18831 * Check if text direction resolution can be done. 18832 * 18833 * @return true if text direction resolution can be done otherwise return false. 18834 */ 18835 public boolean canResolveTextDirection() { 18836 switch (getRawTextDirection()) { 18837 case TEXT_DIRECTION_INHERIT: 18838 if (mParent != null) { 18839 try { 18840 return mParent.canResolveTextDirection(); 18841 } catch (AbstractMethodError e) { 18842 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 18843 " does not fully implement ViewParent", e); 18844 } 18845 } 18846 return false; 18847 18848 default: 18849 return true; 18850 } 18851 } 18852 18853 /** 18854 * Reset resolved text direction. Text direction will be resolved during a call to 18855 * {@link #onMeasure(int, int)}. 18856 * 18857 * @hide 18858 */ 18859 public void resetResolvedTextDirection() { 18860 // Reset any previous text direction resolution 18861 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 18862 // Set to default value 18863 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 18864 } 18865 18866 /** 18867 * @return true if text direction is inherited. 18868 * 18869 * @hide 18870 */ 18871 public boolean isTextDirectionInherited() { 18872 return (getRawTextDirection() == TEXT_DIRECTION_INHERIT); 18873 } 18874 18875 /** 18876 * @return true if text direction is resolved. 18877 */ 18878 public boolean isTextDirectionResolved() { 18879 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED) == PFLAG2_TEXT_DIRECTION_RESOLVED; 18880 } 18881 18882 /** 18883 * Return the value specifying the text alignment or policy that was set with 18884 * {@link #setTextAlignment(int)}. 18885 * 18886 * @return the defined text alignment. It can be one of: 18887 * 18888 * {@link #TEXT_ALIGNMENT_INHERIT}, 18889 * {@link #TEXT_ALIGNMENT_GRAVITY}, 18890 * {@link #TEXT_ALIGNMENT_CENTER}, 18891 * {@link #TEXT_ALIGNMENT_TEXT_START}, 18892 * {@link #TEXT_ALIGNMENT_TEXT_END}, 18893 * {@link #TEXT_ALIGNMENT_VIEW_START}, 18894 * {@link #TEXT_ALIGNMENT_VIEW_END} 18895 * 18896 * @attr ref android.R.styleable#View_textAlignment 18897 * 18898 * @hide 18899 */ 18900 @ViewDebug.ExportedProperty(category = "text", mapping = { 18901 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 18902 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 18903 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 18904 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 18905 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 18906 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 18907 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 18908 }) 18909 @TextAlignment 18910 public int getRawTextAlignment() { 18911 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_MASK) >> PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 18912 } 18913 18914 /** 18915 * Set the text alignment. 18916 * 18917 * @param textAlignment The text alignment to set. Should be one of 18918 * 18919 * {@link #TEXT_ALIGNMENT_INHERIT}, 18920 * {@link #TEXT_ALIGNMENT_GRAVITY}, 18921 * {@link #TEXT_ALIGNMENT_CENTER}, 18922 * {@link #TEXT_ALIGNMENT_TEXT_START}, 18923 * {@link #TEXT_ALIGNMENT_TEXT_END}, 18924 * {@link #TEXT_ALIGNMENT_VIEW_START}, 18925 * {@link #TEXT_ALIGNMENT_VIEW_END} 18926 * 18927 * Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution 18928 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 18929 * will return the default {@link #TEXT_ALIGNMENT_GRAVITY}. 18930 * 18931 * @attr ref android.R.styleable#View_textAlignment 18932 */ 18933 public void setTextAlignment(@TextAlignment int textAlignment) { 18934 if (textAlignment != getRawTextAlignment()) { 18935 // Reset the current and resolved text alignment 18936 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 18937 resetResolvedTextAlignment(); 18938 // Set the new text alignment 18939 mPrivateFlags2 |= 18940 ((textAlignment << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) & PFLAG2_TEXT_ALIGNMENT_MASK); 18941 // Do resolution 18942 resolveTextAlignment(); 18943 // Notify change 18944 onRtlPropertiesChanged(getLayoutDirection()); 18945 // Refresh 18946 requestLayout(); 18947 invalidate(true); 18948 } 18949 } 18950 18951 /** 18952 * Return the resolved text alignment. 18953 * 18954 * @return the resolved text alignment. Returns one of: 18955 * 18956 * {@link #TEXT_ALIGNMENT_GRAVITY}, 18957 * {@link #TEXT_ALIGNMENT_CENTER}, 18958 * {@link #TEXT_ALIGNMENT_TEXT_START}, 18959 * {@link #TEXT_ALIGNMENT_TEXT_END}, 18960 * {@link #TEXT_ALIGNMENT_VIEW_START}, 18961 * {@link #TEXT_ALIGNMENT_VIEW_END} 18962 * 18963 * @attr ref android.R.styleable#View_textAlignment 18964 */ 18965 @ViewDebug.ExportedProperty(category = "text", mapping = { 18966 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 18967 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 18968 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 18969 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 18970 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 18971 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 18972 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 18973 }) 18974 @TextAlignment 18975 public int getTextAlignment() { 18976 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK) >> 18977 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 18978 } 18979 18980 /** 18981 * Resolve the text alignment. 18982 * 18983 * @return true if resolution has been done, false otherwise. 18984 * 18985 * @hide 18986 */ 18987 public boolean resolveTextAlignment() { 18988 // Reset any previous text alignment resolution 18989 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 18990 18991 if (hasRtlSupport()) { 18992 // Set resolved text alignment flag depending on text alignment flag 18993 final int textAlignment = getRawTextAlignment(); 18994 switch (textAlignment) { 18995 case TEXT_ALIGNMENT_INHERIT: 18996 // Check if we can resolve the text alignment 18997 if (!canResolveTextAlignment()) { 18998 // We cannot do the resolution if there is no parent so use the default 18999 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19000 // Resolution will need to happen again later 19001 return false; 19002 } 19003 19004 // Parent has not yet resolved, so we still return the default 19005 try { 19006 if (!mParent.isTextAlignmentResolved()) { 19007 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19008 // Resolution will need to happen again later 19009 return false; 19010 } 19011 } catch (AbstractMethodError e) { 19012 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 19013 " does not fully implement ViewParent", e); 19014 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED | 19015 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19016 return true; 19017 } 19018 19019 int parentResolvedTextAlignment; 19020 try { 19021 parentResolvedTextAlignment = mParent.getTextAlignment(); 19022 } catch (AbstractMethodError e) { 19023 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 19024 " does not fully implement ViewParent", e); 19025 parentResolvedTextAlignment = TEXT_ALIGNMENT_GRAVITY; 19026 } 19027 switch (parentResolvedTextAlignment) { 19028 case TEXT_ALIGNMENT_GRAVITY: 19029 case TEXT_ALIGNMENT_TEXT_START: 19030 case TEXT_ALIGNMENT_TEXT_END: 19031 case TEXT_ALIGNMENT_CENTER: 19032 case TEXT_ALIGNMENT_VIEW_START: 19033 case TEXT_ALIGNMENT_VIEW_END: 19034 // Resolved text alignment is the same as the parent resolved 19035 // text alignment 19036 mPrivateFlags2 |= 19037 (parentResolvedTextAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 19038 break; 19039 default: 19040 // Use default resolved text alignment 19041 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19042 } 19043 break; 19044 case TEXT_ALIGNMENT_GRAVITY: 19045 case TEXT_ALIGNMENT_TEXT_START: 19046 case TEXT_ALIGNMENT_TEXT_END: 19047 case TEXT_ALIGNMENT_CENTER: 19048 case TEXT_ALIGNMENT_VIEW_START: 19049 case TEXT_ALIGNMENT_VIEW_END: 19050 // Resolved text alignment is the same as text alignment 19051 mPrivateFlags2 |= (textAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 19052 break; 19053 default: 19054 // Use default resolved text alignment 19055 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19056 } 19057 } else { 19058 // Use default resolved text alignment 19059 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19060 } 19061 19062 // Set the resolved 19063 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED; 19064 return true; 19065 } 19066 19067 /** 19068 * Check if text alignment resolution can be done. 19069 * 19070 * @return true if text alignment resolution can be done otherwise return false. 19071 */ 19072 public boolean canResolveTextAlignment() { 19073 switch (getRawTextAlignment()) { 19074 case TEXT_DIRECTION_INHERIT: 19075 if (mParent != null) { 19076 try { 19077 return mParent.canResolveTextAlignment(); 19078 } catch (AbstractMethodError e) { 19079 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 19080 " does not fully implement ViewParent", e); 19081 } 19082 } 19083 return false; 19084 19085 default: 19086 return true; 19087 } 19088 } 19089 19090 /** 19091 * Reset resolved text alignment. Text alignment will be resolved during a call to 19092 * {@link #onMeasure(int, int)}. 19093 * 19094 * @hide 19095 */ 19096 public void resetResolvedTextAlignment() { 19097 // Reset any previous text alignment resolution 19098 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 19099 // Set to default 19100 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 19101 } 19102 19103 /** 19104 * @return true if text alignment is inherited. 19105 * 19106 * @hide 19107 */ 19108 public boolean isTextAlignmentInherited() { 19109 return (getRawTextAlignment() == TEXT_ALIGNMENT_INHERIT); 19110 } 19111 19112 /** 19113 * @return true if text alignment is resolved. 19114 */ 19115 public boolean isTextAlignmentResolved() { 19116 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED) == PFLAG2_TEXT_ALIGNMENT_RESOLVED; 19117 } 19118 19119 /** 19120 * Generate a value suitable for use in {@link #setId(int)}. 19121 * This value will not collide with ID values generated at build time by aapt for R.id. 19122 * 19123 * @return a generated ID value 19124 */ 19125 public static int generateViewId() { 19126 for (;;) { 19127 final int result = sNextGeneratedId.get(); 19128 // aapt-generated IDs have the high byte nonzero; clamp to the range under that. 19129 int newValue = result + 1; 19130 if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. 19131 if (sNextGeneratedId.compareAndSet(result, newValue)) { 19132 return result; 19133 } 19134 } 19135 } 19136 19137 /** 19138 * Gets the Views in the hierarchy affected by entering and exiting Activity Scene transitions. 19139 * @param transitioningViews This View will be added to transitioningViews if it is VISIBLE and 19140 * a normal View or a ViewGroup with 19141 * {@link android.view.ViewGroup#isTransitionGroup()} true. 19142 * @hide 19143 */ 19144 public void captureTransitioningViews(List<View> transitioningViews) { 19145 if (getVisibility() == View.VISIBLE) { 19146 transitioningViews.add(this); 19147 } 19148 } 19149 19150 /** 19151 * Adds all Views that have {@link #getTransitionName()} non-null to namedElements. 19152 * @param namedElements Will contain all Views in the hierarchy having a transitionName. 19153 * @hide 19154 */ 19155 public void findNamedViews(Map<String, View> namedElements) { 19156 if (getVisibility() == VISIBLE || mGhostView != null) { 19157 String transitionName = getTransitionName(); 19158 if (transitionName != null) { 19159 namedElements.put(transitionName, this); 19160 } 19161 } 19162 } 19163 19164 // 19165 // Properties 19166 // 19167 /** 19168 * A Property wrapper around the <code>alpha</code> functionality handled by the 19169 * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. 19170 */ 19171 public static final Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { 19172 @Override 19173 public void setValue(View object, float value) { 19174 object.setAlpha(value); 19175 } 19176 19177 @Override 19178 public Float get(View object) { 19179 return object.getAlpha(); 19180 } 19181 }; 19182 19183 /** 19184 * A Property wrapper around the <code>translationX</code> functionality handled by the 19185 * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. 19186 */ 19187 public static final Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { 19188 @Override 19189 public void setValue(View object, float value) { 19190 object.setTranslationX(value); 19191 } 19192 19193 @Override 19194 public Float get(View object) { 19195 return object.getTranslationX(); 19196 } 19197 }; 19198 19199 /** 19200 * A Property wrapper around the <code>translationY</code> functionality handled by the 19201 * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. 19202 */ 19203 public static final Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { 19204 @Override 19205 public void setValue(View object, float value) { 19206 object.setTranslationY(value); 19207 } 19208 19209 @Override 19210 public Float get(View object) { 19211 return object.getTranslationY(); 19212 } 19213 }; 19214 19215 /** 19216 * A Property wrapper around the <code>translationZ</code> functionality handled by the 19217 * {@link View#setTranslationZ(float)} and {@link View#getTranslationZ()} methods. 19218 */ 19219 public static final Property<View, Float> TRANSLATION_Z = new FloatProperty<View>("translationZ") { 19220 @Override 19221 public void setValue(View object, float value) { 19222 object.setTranslationZ(value); 19223 } 19224 19225 @Override 19226 public Float get(View object) { 19227 return object.getTranslationZ(); 19228 } 19229 }; 19230 19231 /** 19232 * A Property wrapper around the <code>x</code> functionality handled by the 19233 * {@link View#setX(float)} and {@link View#getX()} methods. 19234 */ 19235 public static final Property<View, Float> X = new FloatProperty<View>("x") { 19236 @Override 19237 public void setValue(View object, float value) { 19238 object.setX(value); 19239 } 19240 19241 @Override 19242 public Float get(View object) { 19243 return object.getX(); 19244 } 19245 }; 19246 19247 /** 19248 * A Property wrapper around the <code>y</code> functionality handled by the 19249 * {@link View#setY(float)} and {@link View#getY()} methods. 19250 */ 19251 public static final Property<View, Float> Y = new FloatProperty<View>("y") { 19252 @Override 19253 public void setValue(View object, float value) { 19254 object.setY(value); 19255 } 19256 19257 @Override 19258 public Float get(View object) { 19259 return object.getY(); 19260 } 19261 }; 19262 19263 /** 19264 * A Property wrapper around the <code>z</code> functionality handled by the 19265 * {@link View#setZ(float)} and {@link View#getZ()} methods. 19266 */ 19267 public static final Property<View, Float> Z = new FloatProperty<View>("z") { 19268 @Override 19269 public void setValue(View object, float value) { 19270 object.setZ(value); 19271 } 19272 19273 @Override 19274 public Float get(View object) { 19275 return object.getZ(); 19276 } 19277 }; 19278 19279 /** 19280 * A Property wrapper around the <code>rotation</code> functionality handled by the 19281 * {@link View#setRotation(float)} and {@link View#getRotation()} methods. 19282 */ 19283 public static final Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { 19284 @Override 19285 public void setValue(View object, float value) { 19286 object.setRotation(value); 19287 } 19288 19289 @Override 19290 public Float get(View object) { 19291 return object.getRotation(); 19292 } 19293 }; 19294 19295 /** 19296 * A Property wrapper around the <code>rotationX</code> functionality handled by the 19297 * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. 19298 */ 19299 public static final Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { 19300 @Override 19301 public void setValue(View object, float value) { 19302 object.setRotationX(value); 19303 } 19304 19305 @Override 19306 public Float get(View object) { 19307 return object.getRotationX(); 19308 } 19309 }; 19310 19311 /** 19312 * A Property wrapper around the <code>rotationY</code> functionality handled by the 19313 * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. 19314 */ 19315 public static final Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { 19316 @Override 19317 public void setValue(View object, float value) { 19318 object.setRotationY(value); 19319 } 19320 19321 @Override 19322 public Float get(View object) { 19323 return object.getRotationY(); 19324 } 19325 }; 19326 19327 /** 19328 * A Property wrapper around the <code>scaleX</code> functionality handled by the 19329 * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. 19330 */ 19331 public static final Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { 19332 @Override 19333 public void setValue(View object, float value) { 19334 object.setScaleX(value); 19335 } 19336 19337 @Override 19338 public Float get(View object) { 19339 return object.getScaleX(); 19340 } 19341 }; 19342 19343 /** 19344 * A Property wrapper around the <code>scaleY</code> functionality handled by the 19345 * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. 19346 */ 19347 public static final Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { 19348 @Override 19349 public void setValue(View object, float value) { 19350 object.setScaleY(value); 19351 } 19352 19353 @Override 19354 public Float get(View object) { 19355 return object.getScaleY(); 19356 } 19357 }; 19358 19359 /** 19360 * A MeasureSpec encapsulates the layout requirements passed from parent to child. 19361 * Each MeasureSpec represents a requirement for either the width or the height. 19362 * A MeasureSpec is comprised of a size and a mode. There are three possible 19363 * modes: 19364 * <dl> 19365 * <dt>UNSPECIFIED</dt> 19366 * <dd> 19367 * The parent has not imposed any constraint on the child. It can be whatever size 19368 * it wants. 19369 * </dd> 19370 * 19371 * <dt>EXACTLY</dt> 19372 * <dd> 19373 * The parent has determined an exact size for the child. The child is going to be 19374 * given those bounds regardless of how big it wants to be. 19375 * </dd> 19376 * 19377 * <dt>AT_MOST</dt> 19378 * <dd> 19379 * The child can be as large as it wants up to the specified size. 19380 * </dd> 19381 * </dl> 19382 * 19383 * MeasureSpecs are implemented as ints to reduce object allocation. This class 19384 * is provided to pack and unpack the <size, mode> tuple into the int. 19385 */ 19386 public static class MeasureSpec { 19387 private static final int MODE_SHIFT = 30; 19388 private static final int MODE_MASK = 0x3 << MODE_SHIFT; 19389 19390 /** 19391 * Measure specification mode: The parent has not imposed any constraint 19392 * on the child. It can be whatever size it wants. 19393 */ 19394 public static final int UNSPECIFIED = 0 << MODE_SHIFT; 19395 19396 /** 19397 * Measure specification mode: The parent has determined an exact size 19398 * for the child. The child is going to be given those bounds regardless 19399 * of how big it wants to be. 19400 */ 19401 public static final int EXACTLY = 1 << MODE_SHIFT; 19402 19403 /** 19404 * Measure specification mode: The child can be as large as it wants up 19405 * to the specified size. 19406 */ 19407 public static final int AT_MOST = 2 << MODE_SHIFT; 19408 19409 /** 19410 * Creates a measure specification based on the supplied size and mode. 19411 * 19412 * The mode must always be one of the following: 19413 * <ul> 19414 * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> 19415 * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> 19416 * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> 19417 * </ul> 19418 * 19419 * <p><strong>Note:</strong> On API level 17 and lower, makeMeasureSpec's 19420 * implementation was such that the order of arguments did not matter 19421 * and overflow in either value could impact the resulting MeasureSpec. 19422 * {@link android.widget.RelativeLayout} was affected by this bug. 19423 * Apps targeting API levels greater than 17 will get the fixed, more strict 19424 * behavior.</p> 19425 * 19426 * @param size the size of the measure specification 19427 * @param mode the mode of the measure specification 19428 * @return the measure specification based on size and mode 19429 */ 19430 public static int makeMeasureSpec(int size, int mode) { 19431 if (sUseBrokenMakeMeasureSpec) { 19432 return size + mode; 19433 } else { 19434 return (size & ~MODE_MASK) | (mode & MODE_MASK); 19435 } 19436 } 19437 19438 /** 19439 * Extracts the mode from the supplied measure specification. 19440 * 19441 * @param measureSpec the measure specification to extract the mode from 19442 * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, 19443 * {@link android.view.View.MeasureSpec#AT_MOST} or 19444 * {@link android.view.View.MeasureSpec#EXACTLY} 19445 */ 19446 public static int getMode(int measureSpec) { 19447 return (measureSpec & MODE_MASK); 19448 } 19449 19450 /** 19451 * Extracts the size from the supplied measure specification. 19452 * 19453 * @param measureSpec the measure specification to extract the size from 19454 * @return the size in pixels defined in the supplied measure specification 19455 */ 19456 public static int getSize(int measureSpec) { 19457 return (measureSpec & ~MODE_MASK); 19458 } 19459 19460 static int adjust(int measureSpec, int delta) { 19461 final int mode = getMode(measureSpec); 19462 if (mode == UNSPECIFIED) { 19463 // No need to adjust size for UNSPECIFIED mode. 19464 return makeMeasureSpec(0, UNSPECIFIED); 19465 } 19466 int size = getSize(measureSpec) + delta; 19467 if (size < 0) { 19468 Log.e(VIEW_LOG_TAG, "MeasureSpec.adjust: new size would be negative! (" + size + 19469 ") spec: " + toString(measureSpec) + " delta: " + delta); 19470 size = 0; 19471 } 19472 return makeMeasureSpec(size, mode); 19473 } 19474 19475 /** 19476 * Returns a String representation of the specified measure 19477 * specification. 19478 * 19479 * @param measureSpec the measure specification to convert to a String 19480 * @return a String with the following format: "MeasureSpec: MODE SIZE" 19481 */ 19482 public static String toString(int measureSpec) { 19483 int mode = getMode(measureSpec); 19484 int size = getSize(measureSpec); 19485 19486 StringBuilder sb = new StringBuilder("MeasureSpec: "); 19487 19488 if (mode == UNSPECIFIED) 19489 sb.append("UNSPECIFIED "); 19490 else if (mode == EXACTLY) 19491 sb.append("EXACTLY "); 19492 else if (mode == AT_MOST) 19493 sb.append("AT_MOST "); 19494 else 19495 sb.append(mode).append(" "); 19496 19497 sb.append(size); 19498 return sb.toString(); 19499 } 19500 } 19501 19502 private final class CheckForLongPress implements Runnable { 19503 private int mOriginalWindowAttachCount; 19504 19505 @Override 19506 public void run() { 19507 if (isPressed() && (mParent != null) 19508 && mOriginalWindowAttachCount == mWindowAttachCount) { 19509 if (performLongClick()) { 19510 mHasPerformedLongPress = true; 19511 } 19512 } 19513 } 19514 19515 public void rememberWindowAttachCount() { 19516 mOriginalWindowAttachCount = mWindowAttachCount; 19517 } 19518 } 19519 19520 private final class CheckForTap implements Runnable { 19521 public float x; 19522 public float y; 19523 19524 @Override 19525 public void run() { 19526 mPrivateFlags &= ~PFLAG_PREPRESSED; 19527 setPressed(true, x, y); 19528 checkForLongClick(ViewConfiguration.getTapTimeout()); 19529 } 19530 } 19531 19532 private final class PerformClick implements Runnable { 19533 @Override 19534 public void run() { 19535 performClick(); 19536 } 19537 } 19538 19539 /** @hide */ 19540 public void hackTurnOffWindowResizeAnim(boolean off) { 19541 mAttachInfo.mTurnOffWindowResizeAnim = off; 19542 } 19543 19544 /** 19545 * This method returns a ViewPropertyAnimator object, which can be used to animate 19546 * specific properties on this View. 19547 * 19548 * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. 19549 */ 19550 public ViewPropertyAnimator animate() { 19551 if (mAnimator == null) { 19552 mAnimator = new ViewPropertyAnimator(this); 19553 } 19554 return mAnimator; 19555 } 19556 19557 /** 19558 * Sets the name of the View to be used to identify Views in Transitions. 19559 * Names should be unique in the View hierarchy. 19560 * 19561 * @param transitionName The name of the View to uniquely identify it for Transitions. 19562 */ 19563 public final void setTransitionName(String transitionName) { 19564 mTransitionName = transitionName; 19565 } 19566 19567 /** 19568 * Returns the name of the View to be used to identify Views in Transitions. 19569 * Names should be unique in the View hierarchy. 19570 * 19571 * <p>This returns null if the View has not been given a name.</p> 19572 * 19573 * @return The name used of the View to be used to identify Views in Transitions or null 19574 * if no name has been given. 19575 */ 19576 @ViewDebug.ExportedProperty 19577 public String getTransitionName() { 19578 return mTransitionName; 19579 } 19580 19581 /** 19582 * Interface definition for a callback to be invoked when a hardware key event is 19583 * dispatched to this view. The callback will be invoked before the key event is 19584 * given to the view. This is only useful for hardware keyboards; a software input 19585 * method has no obligation to trigger this listener. 19586 */ 19587 public interface OnKeyListener { 19588 /** 19589 * Called when a hardware key is dispatched to a view. This allows listeners to 19590 * get a chance to respond before the target view. 19591 * <p>Key presses in software keyboards will generally NOT trigger this method, 19592 * although some may elect to do so in some situations. Do not assume a 19593 * software input method has to be key-based; even if it is, it may use key presses 19594 * in a different way than you expect, so there is no way to reliably catch soft 19595 * input key presses. 19596 * 19597 * @param v The view the key has been dispatched to. 19598 * @param keyCode The code for the physical key that was pressed 19599 * @param event The KeyEvent object containing full information about 19600 * the event. 19601 * @return True if the listener has consumed the event, false otherwise. 19602 */ 19603 boolean onKey(View v, int keyCode, KeyEvent event); 19604 } 19605 19606 /** 19607 * Interface definition for a callback to be invoked when a touch event is 19608 * dispatched to this view. The callback will be invoked before the touch 19609 * event is given to the view. 19610 */ 19611 public interface OnTouchListener { 19612 /** 19613 * Called when a touch event is dispatched to a view. This allows listeners to 19614 * get a chance to respond before the target view. 19615 * 19616 * @param v The view the touch event has been dispatched to. 19617 * @param event The MotionEvent object containing full information about 19618 * the event. 19619 * @return True if the listener has consumed the event, false otherwise. 19620 */ 19621 boolean onTouch(View v, MotionEvent event); 19622 } 19623 19624 /** 19625 * Interface definition for a callback to be invoked when a hover event is 19626 * dispatched to this view. The callback will be invoked before the hover 19627 * event is given to the view. 19628 */ 19629 public interface OnHoverListener { 19630 /** 19631 * Called when a hover event is dispatched to a view. This allows listeners to 19632 * get a chance to respond before the target view. 19633 * 19634 * @param v The view the hover event has been dispatched to. 19635 * @param event The MotionEvent object containing full information about 19636 * the event. 19637 * @return True if the listener has consumed the event, false otherwise. 19638 */ 19639 boolean onHover(View v, MotionEvent event); 19640 } 19641 19642 /** 19643 * Interface definition for a callback to be invoked when a generic motion event is 19644 * dispatched to this view. The callback will be invoked before the generic motion 19645 * event is given to the view. 19646 */ 19647 public interface OnGenericMotionListener { 19648 /** 19649 * Called when a generic motion event is dispatched to a view. This allows listeners to 19650 * get a chance to respond before the target view. 19651 * 19652 * @param v The view the generic motion event has been dispatched to. 19653 * @param event The MotionEvent object containing full information about 19654 * the event. 19655 * @return True if the listener has consumed the event, false otherwise. 19656 */ 19657 boolean onGenericMotion(View v, MotionEvent event); 19658 } 19659 19660 /** 19661 * Interface definition for a callback to be invoked when a view has been clicked and held. 19662 */ 19663 public interface OnLongClickListener { 19664 /** 19665 * Called when a view has been clicked and held. 19666 * 19667 * @param v The view that was clicked and held. 19668 * 19669 * @return true if the callback consumed the long click, false otherwise. 19670 */ 19671 boolean onLongClick(View v); 19672 } 19673 19674 /** 19675 * Interface definition for a callback to be invoked when a drag is being dispatched 19676 * to this view. The callback will be invoked before the hosting view's own 19677 * onDrag(event) method. If the listener wants to fall back to the hosting view's 19678 * onDrag(event) behavior, it should return 'false' from this callback. 19679 * 19680 * <div class="special reference"> 19681 * <h3>Developer Guides</h3> 19682 * <p>For a guide to implementing drag and drop features, read the 19683 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 19684 * </div> 19685 */ 19686 public interface OnDragListener { 19687 /** 19688 * Called when a drag event is dispatched to a view. This allows listeners 19689 * to get a chance to override base View behavior. 19690 * 19691 * @param v The View that received the drag event. 19692 * @param event The {@link android.view.DragEvent} object for the drag event. 19693 * @return {@code true} if the drag event was handled successfully, or {@code false} 19694 * if the drag event was not handled. Note that {@code false} will trigger the View 19695 * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. 19696 */ 19697 boolean onDrag(View v, DragEvent event); 19698 } 19699 19700 /** 19701 * Interface definition for a callback to be invoked when the focus state of 19702 * a view changed. 19703 */ 19704 public interface OnFocusChangeListener { 19705 /** 19706 * Called when the focus state of a view has changed. 19707 * 19708 * @param v The view whose state has changed. 19709 * @param hasFocus The new focus state of v. 19710 */ 19711 void onFocusChange(View v, boolean hasFocus); 19712 } 19713 19714 /** 19715 * Interface definition for a callback to be invoked when a view is clicked. 19716 */ 19717 public interface OnClickListener { 19718 /** 19719 * Called when a view has been clicked. 19720 * 19721 * @param v The view that was clicked. 19722 */ 19723 void onClick(View v); 19724 } 19725 19726 /** 19727 * Interface definition for a callback to be invoked when the context menu 19728 * for this view is being built. 19729 */ 19730 public interface OnCreateContextMenuListener { 19731 /** 19732 * Called when the context menu for this view is being built. It is not 19733 * safe to hold onto the menu after this method returns. 19734 * 19735 * @param menu The context menu that is being built 19736 * @param v The view for which the context menu is being built 19737 * @param menuInfo Extra information about the item for which the 19738 * context menu should be shown. This information will vary 19739 * depending on the class of v. 19740 */ 19741 void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); 19742 } 19743 19744 /** 19745 * Interface definition for a callback to be invoked when the status bar changes 19746 * visibility. This reports <strong>global</strong> changes to the system UI 19747 * state, not what the application is requesting. 19748 * 19749 * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) 19750 */ 19751 public interface OnSystemUiVisibilityChangeListener { 19752 /** 19753 * Called when the status bar changes visibility because of a call to 19754 * {@link View#setSystemUiVisibility(int)}. 19755 * 19756 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 19757 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, and {@link #SYSTEM_UI_FLAG_FULLSCREEN}. 19758 * This tells you the <strong>global</strong> state of these UI visibility 19759 * flags, not what your app is currently applying. 19760 */ 19761 public void onSystemUiVisibilityChange(int visibility); 19762 } 19763 19764 /** 19765 * Interface definition for a callback to be invoked when this view is attached 19766 * or detached from its window. 19767 */ 19768 public interface OnAttachStateChangeListener { 19769 /** 19770 * Called when the view is attached to a window. 19771 * @param v The view that was attached 19772 */ 19773 public void onViewAttachedToWindow(View v); 19774 /** 19775 * Called when the view is detached from a window. 19776 * @param v The view that was detached 19777 */ 19778 public void onViewDetachedFromWindow(View v); 19779 } 19780 19781 /** 19782 * Listener for applying window insets on a view in a custom way. 19783 * 19784 * <p>Apps may choose to implement this interface if they want to apply custom policy 19785 * to the way that window insets are treated for a view. If an OnApplyWindowInsetsListener 19786 * is set, its 19787 * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} 19788 * method will be called instead of the View's own 19789 * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. The listener 19790 * may optionally call the parameter View's <code>onApplyWindowInsets</code> method to apply 19791 * the View's normal behavior as part of its own.</p> 19792 */ 19793 public interface OnApplyWindowInsetsListener { 19794 /** 19795 * When {@link View#setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) set} 19796 * on a View, this listener method will be called instead of the view's own 19797 * {@link View#onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. 19798 * 19799 * @param v The view applying window insets 19800 * @param insets The insets to apply 19801 * @return The insets supplied, minus any insets that were consumed 19802 */ 19803 public WindowInsets onApplyWindowInsets(View v, WindowInsets insets); 19804 } 19805 19806 private final class UnsetPressedState implements Runnable { 19807 @Override 19808 public void run() { 19809 setPressed(false); 19810 } 19811 } 19812 19813 /** 19814 * Base class for derived classes that want to save and restore their own 19815 * state in {@link android.view.View#onSaveInstanceState()}. 19816 */ 19817 public static class BaseSavedState extends AbsSavedState { 19818 /** 19819 * Constructor used when reading from a parcel. Reads the state of the superclass. 19820 * 19821 * @param source 19822 */ 19823 public BaseSavedState(Parcel source) { 19824 super(source); 19825 } 19826 19827 /** 19828 * Constructor called by derived classes when creating their SavedState objects 19829 * 19830 * @param superState The state of the superclass of this view 19831 */ 19832 public BaseSavedState(Parcelable superState) { 19833 super(superState); 19834 } 19835 19836 public static final Parcelable.Creator<BaseSavedState> CREATOR = 19837 new Parcelable.Creator<BaseSavedState>() { 19838 public BaseSavedState createFromParcel(Parcel in) { 19839 return new BaseSavedState(in); 19840 } 19841 19842 public BaseSavedState[] newArray(int size) { 19843 return new BaseSavedState[size]; 19844 } 19845 }; 19846 } 19847 19848 /** 19849 * A set of information given to a view when it is attached to its parent 19850 * window. 19851 */ 19852 final static class AttachInfo { 19853 interface Callbacks { 19854 void playSoundEffect(int effectId); 19855 boolean performHapticFeedback(int effectId, boolean always); 19856 } 19857 19858 /** 19859 * InvalidateInfo is used to post invalidate(int, int, int, int) messages 19860 * to a Handler. This class contains the target (View) to invalidate and 19861 * the coordinates of the dirty rectangle. 19862 * 19863 * For performance purposes, this class also implements a pool of up to 19864 * POOL_LIMIT objects that get reused. This reduces memory allocations 19865 * whenever possible. 19866 */ 19867 static class InvalidateInfo { 19868 private static final int POOL_LIMIT = 10; 19869 19870 private static final SynchronizedPool<InvalidateInfo> sPool = 19871 new SynchronizedPool<InvalidateInfo>(POOL_LIMIT); 19872 19873 View target; 19874 19875 int left; 19876 int top; 19877 int right; 19878 int bottom; 19879 19880 public static InvalidateInfo obtain() { 19881 InvalidateInfo instance = sPool.acquire(); 19882 return (instance != null) ? instance : new InvalidateInfo(); 19883 } 19884 19885 public void recycle() { 19886 target = null; 19887 sPool.release(this); 19888 } 19889 } 19890 19891 final IWindowSession mSession; 19892 19893 final IWindow mWindow; 19894 19895 final IBinder mWindowToken; 19896 19897 final Display mDisplay; 19898 19899 final Callbacks mRootCallbacks; 19900 19901 IWindowId mIWindowId; 19902 WindowId mWindowId; 19903 19904 /** 19905 * The top view of the hierarchy. 19906 */ 19907 View mRootView; 19908 19909 IBinder mPanelParentWindowToken; 19910 19911 boolean mHardwareAccelerated; 19912 boolean mHardwareAccelerationRequested; 19913 HardwareRenderer mHardwareRenderer; 19914 19915 /** 19916 * The state of the display to which the window is attached, as reported 19917 * by {@link Display#getState()}. Note that the display state constants 19918 * declared by {@link Display} do not exactly line up with the screen state 19919 * constants declared by {@link View} (there are more display states than 19920 * screen states). 19921 */ 19922 int mDisplayState = Display.STATE_UNKNOWN; 19923 19924 /** 19925 * Scale factor used by the compatibility mode 19926 */ 19927 float mApplicationScale; 19928 19929 /** 19930 * Indicates whether the application is in compatibility mode 19931 */ 19932 boolean mScalingRequired; 19933 19934 /** 19935 * If set, ViewRootImpl doesn't use its lame animation for when the window resizes. 19936 */ 19937 boolean mTurnOffWindowResizeAnim; 19938 19939 /** 19940 * Left position of this view's window 19941 */ 19942 int mWindowLeft; 19943 19944 /** 19945 * Top position of this view's window 19946 */ 19947 int mWindowTop; 19948 19949 /** 19950 * Indicates whether views need to use 32-bit drawing caches 19951 */ 19952 boolean mUse32BitDrawingCache; 19953 19954 /** 19955 * For windows that are full-screen but using insets to layout inside 19956 * of the screen areas, these are the current insets to appear inside 19957 * the overscan area of the display. 19958 */ 19959 final Rect mOverscanInsets = new Rect(); 19960 19961 /** 19962 * For windows that are full-screen but using insets to layout inside 19963 * of the screen decorations, these are the current insets for the 19964 * content of the window. 19965 */ 19966 final Rect mContentInsets = new Rect(); 19967 19968 /** 19969 * For windows that are full-screen but using insets to layout inside 19970 * of the screen decorations, these are the current insets for the 19971 * actual visible parts of the window. 19972 */ 19973 final Rect mVisibleInsets = new Rect(); 19974 19975 /** 19976 * For windows that are full-screen but using insets to layout inside 19977 * of the screen decorations, these are the current insets for the 19978 * stable system windows. 19979 */ 19980 final Rect mStableInsets = new Rect(); 19981 19982 /** 19983 * The internal insets given by this window. This value is 19984 * supplied by the client (through 19985 * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will 19986 * be given to the window manager when changed to be used in laying 19987 * out windows behind it. 19988 */ 19989 final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets 19990 = new ViewTreeObserver.InternalInsetsInfo(); 19991 19992 /** 19993 * Set to true when mGivenInternalInsets is non-empty. 19994 */ 19995 boolean mHasNonEmptyGivenInternalInsets; 19996 19997 /** 19998 * All views in the window's hierarchy that serve as scroll containers, 19999 * used to determine if the window can be resized or must be panned 20000 * to adjust for a soft input area. 20001 */ 20002 final ArrayList<View> mScrollContainers = new ArrayList<View>(); 20003 20004 final KeyEvent.DispatcherState mKeyDispatchState 20005 = new KeyEvent.DispatcherState(); 20006 20007 /** 20008 * Indicates whether the view's window currently has the focus. 20009 */ 20010 boolean mHasWindowFocus; 20011 20012 /** 20013 * The current visibility of the window. 20014 */ 20015 int mWindowVisibility; 20016 20017 /** 20018 * Indicates the time at which drawing started to occur. 20019 */ 20020 long mDrawingTime; 20021 20022 /** 20023 * Indicates whether or not ignoring the DIRTY_MASK flags. 20024 */ 20025 boolean mIgnoreDirtyState; 20026 20027 /** 20028 * This flag tracks when the mIgnoreDirtyState flag is set during draw(), 20029 * to avoid clearing that flag prematurely. 20030 */ 20031 boolean mSetIgnoreDirtyState = false; 20032 20033 /** 20034 * Indicates whether the view's window is currently in touch mode. 20035 */ 20036 boolean mInTouchMode; 20037 20038 /** 20039 * Indicates whether the view has requested unbuffered input dispatching for the current 20040 * event stream. 20041 */ 20042 boolean mUnbufferedDispatchRequested; 20043 20044 /** 20045 * Indicates that ViewAncestor should trigger a global layout change 20046 * the next time it performs a traversal 20047 */ 20048 boolean mRecomputeGlobalAttributes; 20049 20050 /** 20051 * Always report new attributes at next traversal. 20052 */ 20053 boolean mForceReportNewAttributes; 20054 20055 /** 20056 * Set during a traveral if any views want to keep the screen on. 20057 */ 20058 boolean mKeepScreenOn; 20059 20060 /** 20061 * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). 20062 */ 20063 int mSystemUiVisibility; 20064 20065 /** 20066 * Hack to force certain system UI visibility flags to be cleared. 20067 */ 20068 int mDisabledSystemUiVisibility; 20069 20070 /** 20071 * Last global system UI visibility reported by the window manager. 20072 */ 20073 int mGlobalSystemUiVisibility; 20074 20075 /** 20076 * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener 20077 * attached. 20078 */ 20079 boolean mHasSystemUiListeners; 20080 20081 /** 20082 * Set if the window has requested to extend into the overscan region 20083 * via WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN. 20084 */ 20085 boolean mOverscanRequested; 20086 20087 /** 20088 * Set if the visibility of any views has changed. 20089 */ 20090 boolean mViewVisibilityChanged; 20091 20092 /** 20093 * Set to true if a view has been scrolled. 20094 */ 20095 boolean mViewScrollChanged; 20096 20097 /** 20098 * Set to true if high contrast mode enabled 20099 */ 20100 boolean mHighContrastText; 20101 20102 /** 20103 * Global to the view hierarchy used as a temporary for dealing with 20104 * x/y points in the transparent region computations. 20105 */ 20106 final int[] mTransparentLocation = new int[2]; 20107 20108 /** 20109 * Global to the view hierarchy used as a temporary for dealing with 20110 * x/y points in the ViewGroup.invalidateChild implementation. 20111 */ 20112 final int[] mInvalidateChildLocation = new int[2]; 20113 20114 /** 20115 * Global to the view hierarchy used as a temporary for dealng with 20116 * computing absolute on-screen location. 20117 */ 20118 final int[] mTmpLocation = new int[2]; 20119 20120 /** 20121 * Global to the view hierarchy used as a temporary for dealing with 20122 * x/y location when view is transformed. 20123 */ 20124 final float[] mTmpTransformLocation = new float[2]; 20125 20126 /** 20127 * The view tree observer used to dispatch global events like 20128 * layout, pre-draw, touch mode change, etc. 20129 */ 20130 final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); 20131 20132 /** 20133 * A Canvas used by the view hierarchy to perform bitmap caching. 20134 */ 20135 Canvas mCanvas; 20136 20137 /** 20138 * The view root impl. 20139 */ 20140 final ViewRootImpl mViewRootImpl; 20141 20142 /** 20143 * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This 20144 * handler can be used to pump events in the UI events queue. 20145 */ 20146 final Handler mHandler; 20147 20148 /** 20149 * Temporary for use in computing invalidate rectangles while 20150 * calling up the hierarchy. 20151 */ 20152 final Rect mTmpInvalRect = new Rect(); 20153 20154 /** 20155 * Temporary for use in computing hit areas with transformed views 20156 */ 20157 final RectF mTmpTransformRect = new RectF(); 20158 20159 /** 20160 * Temporary for use in transforming invalidation rect 20161 */ 20162 final Matrix mTmpMatrix = new Matrix(); 20163 20164 /** 20165 * Temporary for use in transforming invalidation rect 20166 */ 20167 final Transformation mTmpTransformation = new Transformation(); 20168 20169 /** 20170 * Temporary for use in querying outlines from OutlineProviders 20171 */ 20172 final Outline mTmpOutline = new Outline(); 20173 20174 /** 20175 * Temporary list for use in collecting focusable descendents of a view. 20176 */ 20177 final ArrayList<View> mTempArrayList = new ArrayList<View>(24); 20178 20179 /** 20180 * The id of the window for accessibility purposes. 20181 */ 20182 int mAccessibilityWindowId = AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 20183 20184 /** 20185 * Flags related to accessibility processing. 20186 * 20187 * @see AccessibilityNodeInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 20188 * @see AccessibilityNodeInfo#FLAG_REPORT_VIEW_IDS 20189 */ 20190 int mAccessibilityFetchFlags; 20191 20192 /** 20193 * The drawable for highlighting accessibility focus. 20194 */ 20195 Drawable mAccessibilityFocusDrawable; 20196 20197 /** 20198 * Show where the margins, bounds and layout bounds are for each view. 20199 */ 20200 boolean mDebugLayout = SystemProperties.getBoolean(DEBUG_LAYOUT_PROPERTY, false); 20201 20202 /** 20203 * Point used to compute visible regions. 20204 */ 20205 final Point mPoint = new Point(); 20206 20207 /** 20208 * Used to track which View originated a requestLayout() call, used when 20209 * requestLayout() is called during layout. 20210 */ 20211 View mViewRequestingLayout; 20212 20213 /** 20214 * Creates a new set of attachment information with the specified 20215 * events handler and thread. 20216 * 20217 * @param handler the events handler the view must use 20218 */ 20219 AttachInfo(IWindowSession session, IWindow window, Display display, 20220 ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { 20221 mSession = session; 20222 mWindow = window; 20223 mWindowToken = window.asBinder(); 20224 mDisplay = display; 20225 mViewRootImpl = viewRootImpl; 20226 mHandler = handler; 20227 mRootCallbacks = effectPlayer; 20228 } 20229 } 20230 20231 /** 20232 * <p>ScrollabilityCache holds various fields used by a View when scrolling 20233 * is supported. This avoids keeping too many unused fields in most 20234 * instances of View.</p> 20235 */ 20236 private static class ScrollabilityCache implements Runnable { 20237 20238 /** 20239 * Scrollbars are not visible 20240 */ 20241 public static final int OFF = 0; 20242 20243 /** 20244 * Scrollbars are visible 20245 */ 20246 public static final int ON = 1; 20247 20248 /** 20249 * Scrollbars are fading away 20250 */ 20251 public static final int FADING = 2; 20252 20253 public boolean fadeScrollBars; 20254 20255 public int fadingEdgeLength; 20256 public int scrollBarDefaultDelayBeforeFade; 20257 public int scrollBarFadeDuration; 20258 20259 public int scrollBarSize; 20260 public ScrollBarDrawable scrollBar; 20261 public float[] interpolatorValues; 20262 public View host; 20263 20264 public final Paint paint; 20265 public final Matrix matrix; 20266 public Shader shader; 20267 20268 public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); 20269 20270 private static final float[] OPAQUE = { 255 }; 20271 private static final float[] TRANSPARENT = { 0.0f }; 20272 20273 /** 20274 * When fading should start. This time moves into the future every time 20275 * a new scroll happens. Measured based on SystemClock.uptimeMillis() 20276 */ 20277 public long fadeStartTime; 20278 20279 20280 /** 20281 * The current state of the scrollbars: ON, OFF, or FADING 20282 */ 20283 public int state = OFF; 20284 20285 private int mLastColor; 20286 20287 public ScrollabilityCache(ViewConfiguration configuration, View host) { 20288 fadingEdgeLength = configuration.getScaledFadingEdgeLength(); 20289 scrollBarSize = configuration.getScaledScrollBarSize(); 20290 scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); 20291 scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); 20292 20293 paint = new Paint(); 20294 matrix = new Matrix(); 20295 // use use a height of 1, and then wack the matrix each time we 20296 // actually use it. 20297 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 20298 paint.setShader(shader); 20299 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 20300 20301 this.host = host; 20302 } 20303 20304 public void setFadeColor(int color) { 20305 if (color != mLastColor) { 20306 mLastColor = color; 20307 20308 if (color != 0) { 20309 shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, 20310 color & 0x00FFFFFF, Shader.TileMode.CLAMP); 20311 paint.setShader(shader); 20312 // Restore the default transfer mode (src_over) 20313 paint.setXfermode(null); 20314 } else { 20315 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 20316 paint.setShader(shader); 20317 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 20318 } 20319 } 20320 } 20321 20322 public void run() { 20323 long now = AnimationUtils.currentAnimationTimeMillis(); 20324 if (now >= fadeStartTime) { 20325 20326 // the animation fades the scrollbars out by changing 20327 // the opacity (alpha) from fully opaque to fully 20328 // transparent 20329 int nextFrame = (int) now; 20330 int framesCount = 0; 20331 20332 Interpolator interpolator = scrollBarInterpolator; 20333 20334 // Start opaque 20335 interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); 20336 20337 // End transparent 20338 nextFrame += scrollBarFadeDuration; 20339 interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); 20340 20341 state = FADING; 20342 20343 // Kick off the fade animation 20344 host.invalidate(true); 20345 } 20346 } 20347 } 20348 20349 /** 20350 * Resuable callback for sending 20351 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 20352 */ 20353 private class SendViewScrolledAccessibilityEvent implements Runnable { 20354 public volatile boolean mIsPending; 20355 20356 public void run() { 20357 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); 20358 mIsPending = false; 20359 } 20360 } 20361 20362 /** 20363 * <p> 20364 * This class represents a delegate that can be registered in a {@link View} 20365 * to enhance accessibility support via composition rather via inheritance. 20366 * It is specifically targeted to widget developers that extend basic View 20367 * classes i.e. classes in package android.view, that would like their 20368 * applications to be backwards compatible. 20369 * </p> 20370 * <div class="special reference"> 20371 * <h3>Developer Guides</h3> 20372 * <p>For more information about making applications accessible, read the 20373 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 20374 * developer guide.</p> 20375 * </div> 20376 * <p> 20377 * A scenario in which a developer would like to use an accessibility delegate 20378 * is overriding a method introduced in a later API version then the minimal API 20379 * version supported by the application. For example, the method 20380 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available 20381 * in API version 4 when the accessibility APIs were first introduced. If a 20382 * developer would like his application to run on API version 4 devices (assuming 20383 * all other APIs used by the application are version 4 or lower) and take advantage 20384 * of this method, instead of overriding the method which would break the application's 20385 * backwards compatibility, he can override the corresponding method in this 20386 * delegate and register the delegate in the target View if the API version of 20387 * the system is high enough i.e. the API version is same or higher to the API 20388 * version that introduced 20389 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. 20390 * </p> 20391 * <p> 20392 * Here is an example implementation: 20393 * </p> 20394 * <code><pre><p> 20395 * if (Build.VERSION.SDK_INT >= 14) { 20396 * // If the API version is equal of higher than the version in 20397 * // which onInitializeAccessibilityNodeInfo was introduced we 20398 * // register a delegate with a customized implementation. 20399 * View view = findViewById(R.id.view_id); 20400 * view.setAccessibilityDelegate(new AccessibilityDelegate() { 20401 * public void onInitializeAccessibilityNodeInfo(View host, 20402 * AccessibilityNodeInfo info) { 20403 * // Let the default implementation populate the info. 20404 * super.onInitializeAccessibilityNodeInfo(host, info); 20405 * // Set some other information. 20406 * info.setEnabled(host.isEnabled()); 20407 * } 20408 * }); 20409 * } 20410 * </code></pre></p> 20411 * <p> 20412 * This delegate contains methods that correspond to the accessibility methods 20413 * in View. If a delegate has been specified the implementation in View hands 20414 * off handling to the corresponding method in this delegate. The default 20415 * implementation the delegate methods behaves exactly as the corresponding 20416 * method in View for the case of no accessibility delegate been set. Hence, 20417 * to customize the behavior of a View method, clients can override only the 20418 * corresponding delegate method without altering the behavior of the rest 20419 * accessibility related methods of the host view. 20420 * </p> 20421 */ 20422 public static class AccessibilityDelegate { 20423 20424 /** 20425 * Sends an accessibility event of the given type. If accessibility is not 20426 * enabled this method has no effect. 20427 * <p> 20428 * The default implementation behaves as {@link View#sendAccessibilityEvent(int) 20429 * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate 20430 * been set. 20431 * </p> 20432 * 20433 * @param host The View hosting the delegate. 20434 * @param eventType The type of the event to send. 20435 * 20436 * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) 20437 */ 20438 public void sendAccessibilityEvent(View host, int eventType) { 20439 host.sendAccessibilityEventInternal(eventType); 20440 } 20441 20442 /** 20443 * Performs the specified accessibility action on the view. For 20444 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 20445 * <p> 20446 * The default implementation behaves as 20447 * {@link View#performAccessibilityAction(int, Bundle) 20448 * View#performAccessibilityAction(int, Bundle)} for the case of 20449 * no accessibility delegate been set. 20450 * </p> 20451 * 20452 * @param action The action to perform. 20453 * @return Whether the action was performed. 20454 * 20455 * @see View#performAccessibilityAction(int, Bundle) 20456 * View#performAccessibilityAction(int, Bundle) 20457 */ 20458 public boolean performAccessibilityAction(View host, int action, Bundle args) { 20459 return host.performAccessibilityActionInternal(action, args); 20460 } 20461 20462 /** 20463 * Sends an accessibility event. This method behaves exactly as 20464 * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an 20465 * empty {@link AccessibilityEvent} and does not perform a check whether 20466 * accessibility is enabled. 20467 * <p> 20468 * The default implementation behaves as 20469 * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) 20470 * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for 20471 * the case of no accessibility delegate been set. 20472 * </p> 20473 * 20474 * @param host The View hosting the delegate. 20475 * @param event The event to send. 20476 * 20477 * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) 20478 * View#sendAccessibilityEventUnchecked(AccessibilityEvent) 20479 */ 20480 public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { 20481 host.sendAccessibilityEventUncheckedInternal(event); 20482 } 20483 20484 /** 20485 * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then 20486 * to its children for adding their text content to the event. 20487 * <p> 20488 * The default implementation behaves as 20489 * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 20490 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for 20491 * the case of no accessibility delegate been set. 20492 * </p> 20493 * 20494 * @param host The View hosting the delegate. 20495 * @param event The event. 20496 * @return True if the event population was completed. 20497 * 20498 * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 20499 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 20500 */ 20501 public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 20502 return host.dispatchPopulateAccessibilityEventInternal(event); 20503 } 20504 20505 /** 20506 * Gives a chance to the host View to populate the accessibility event with its 20507 * text content. 20508 * <p> 20509 * The default implementation behaves as 20510 * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) 20511 * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for 20512 * the case of no accessibility delegate been set. 20513 * </p> 20514 * 20515 * @param host The View hosting the delegate. 20516 * @param event The accessibility event which to populate. 20517 * 20518 * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) 20519 * View#onPopulateAccessibilityEvent(AccessibilityEvent) 20520 */ 20521 public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 20522 host.onPopulateAccessibilityEventInternal(event); 20523 } 20524 20525 /** 20526 * Initializes an {@link AccessibilityEvent} with information about the 20527 * the host View which is the event source. 20528 * <p> 20529 * The default implementation behaves as 20530 * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) 20531 * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for 20532 * the case of no accessibility delegate been set. 20533 * </p> 20534 * 20535 * @param host The View hosting the delegate. 20536 * @param event The event to initialize. 20537 * 20538 * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) 20539 * View#onInitializeAccessibilityEvent(AccessibilityEvent) 20540 */ 20541 public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 20542 host.onInitializeAccessibilityEventInternal(event); 20543 } 20544 20545 /** 20546 * Initializes an {@link AccessibilityNodeInfo} with information about the host view. 20547 * <p> 20548 * The default implementation behaves as 20549 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 20550 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for 20551 * the case of no accessibility delegate been set. 20552 * </p> 20553 * 20554 * @param host The View hosting the delegate. 20555 * @param info The instance to initialize. 20556 * 20557 * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 20558 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 20559 */ 20560 public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { 20561 host.onInitializeAccessibilityNodeInfoInternal(info); 20562 } 20563 20564 /** 20565 * Called when a child of the host View has requested sending an 20566 * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) 20567 * to augment the event. 20568 * <p> 20569 * The default implementation behaves as 20570 * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 20571 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for 20572 * the case of no accessibility delegate been set. 20573 * </p> 20574 * 20575 * @param host The View hosting the delegate. 20576 * @param child The child which requests sending the event. 20577 * @param event The event to be sent. 20578 * @return True if the event should be sent 20579 * 20580 * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 20581 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 20582 */ 20583 public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, 20584 AccessibilityEvent event) { 20585 return host.onRequestSendAccessibilityEventInternal(child, event); 20586 } 20587 20588 /** 20589 * Gets the provider for managing a virtual view hierarchy rooted at this View 20590 * and reported to {@link android.accessibilityservice.AccessibilityService}s 20591 * that explore the window content. 20592 * <p> 20593 * The default implementation behaves as 20594 * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for 20595 * the case of no accessibility delegate been set. 20596 * </p> 20597 * 20598 * @return The provider. 20599 * 20600 * @see AccessibilityNodeProvider 20601 */ 20602 public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { 20603 return null; 20604 } 20605 20606 /** 20607 * Returns an {@link AccessibilityNodeInfo} representing the host view from the 20608 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 20609 * This method is responsible for obtaining an accessibility node info from a 20610 * pool of reusable instances and calling 20611 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on the host 20612 * view to initialize the former. 20613 * <p> 20614 * <strong>Note:</strong> The client is responsible for recycling the obtained 20615 * instance by calling {@link AccessibilityNodeInfo#recycle()} to minimize object 20616 * creation. 20617 * </p> 20618 * <p> 20619 * The default implementation behaves as 20620 * {@link View#createAccessibilityNodeInfo() View#createAccessibilityNodeInfo()} for 20621 * the case of no accessibility delegate been set. 20622 * </p> 20623 * @return A populated {@link AccessibilityNodeInfo}. 20624 * 20625 * @see AccessibilityNodeInfo 20626 * 20627 * @hide 20628 */ 20629 public AccessibilityNodeInfo createAccessibilityNodeInfo(View host) { 20630 return host.createAccessibilityNodeInfoInternal(); 20631 } 20632 } 20633 20634 private class MatchIdPredicate implements Predicate<View> { 20635 public int mId; 20636 20637 @Override 20638 public boolean apply(View view) { 20639 return (view.mID == mId); 20640 } 20641 } 20642 20643 private class MatchLabelForPredicate implements Predicate<View> { 20644 private int mLabeledId; 20645 20646 @Override 20647 public boolean apply(View view) { 20648 return (view.mLabelForId == mLabeledId); 20649 } 20650 } 20651 20652 private class SendViewStateChangedAccessibilityEvent implements Runnable { 20653 private int mChangeTypes = 0; 20654 private boolean mPosted; 20655 private boolean mPostedWithDelay; 20656 private long mLastEventTimeMillis; 20657 20658 @Override 20659 public void run() { 20660 mPosted = false; 20661 mPostedWithDelay = false; 20662 mLastEventTimeMillis = SystemClock.uptimeMillis(); 20663 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 20664 final AccessibilityEvent event = AccessibilityEvent.obtain(); 20665 event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); 20666 event.setContentChangeTypes(mChangeTypes); 20667 sendAccessibilityEventUnchecked(event); 20668 } 20669 mChangeTypes = 0; 20670 } 20671 20672 public void runOrPost(int changeType) { 20673 mChangeTypes |= changeType; 20674 20675 // If this is a live region or the child of a live region, collect 20676 // all events from this frame and send them on the next frame. 20677 if (inLiveRegion()) { 20678 // If we're already posted with a delay, remove that. 20679 if (mPostedWithDelay) { 20680 removeCallbacks(this); 20681 mPostedWithDelay = false; 20682 } 20683 // Only post if we're not already posted. 20684 if (!mPosted) { 20685 post(this); 20686 mPosted = true; 20687 } 20688 return; 20689 } 20690 20691 if (mPosted) { 20692 return; 20693 } 20694 final long timeSinceLastMillis = SystemClock.uptimeMillis() - mLastEventTimeMillis; 20695 final long minEventIntevalMillis = 20696 ViewConfiguration.getSendRecurringAccessibilityEventsInterval(); 20697 if (timeSinceLastMillis >= minEventIntevalMillis) { 20698 removeCallbacks(this); 20699 run(); 20700 } else { 20701 postDelayed(this, minEventIntevalMillis - timeSinceLastMillis); 20702 mPosted = true; 20703 mPostedWithDelay = true; 20704 } 20705 } 20706 } 20707 20708 private boolean inLiveRegion() { 20709 if (getAccessibilityLiveRegion() != View.ACCESSIBILITY_LIVE_REGION_NONE) { 20710 return true; 20711 } 20712 20713 ViewParent parent = getParent(); 20714 while (parent instanceof View) { 20715 if (((View) parent).getAccessibilityLiveRegion() 20716 != View.ACCESSIBILITY_LIVE_REGION_NONE) { 20717 return true; 20718 } 20719 parent = parent.getParent(); 20720 } 20721 20722 return false; 20723 } 20724 20725 /** 20726 * Dump all private flags in readable format, useful for documentation and 20727 * sanity checking. 20728 */ 20729 private static void dumpFlags() { 20730 final HashMap<String, String> found = Maps.newHashMap(); 20731 try { 20732 for (Field field : View.class.getDeclaredFields()) { 20733 final int modifiers = field.getModifiers(); 20734 if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) { 20735 if (field.getType().equals(int.class)) { 20736 final int value = field.getInt(null); 20737 dumpFlag(found, field.getName(), value); 20738 } else if (field.getType().equals(int[].class)) { 20739 final int[] values = (int[]) field.get(null); 20740 for (int i = 0; i < values.length; i++) { 20741 dumpFlag(found, field.getName() + "[" + i + "]", values[i]); 20742 } 20743 } 20744 } 20745 } 20746 } catch (IllegalAccessException e) { 20747 throw new RuntimeException(e); 20748 } 20749 20750 final ArrayList<String> keys = Lists.newArrayList(); 20751 keys.addAll(found.keySet()); 20752 Collections.sort(keys); 20753 for (String key : keys) { 20754 Log.d(VIEW_LOG_TAG, found.get(key)); 20755 } 20756 } 20757 20758 private static void dumpFlag(HashMap<String, String> found, String name, int value) { 20759 // Sort flags by prefix, then by bits, always keeping unique keys 20760 final String bits = String.format("%32s", Integer.toBinaryString(value)).replace('0', ' '); 20761 final int prefix = name.indexOf('_'); 20762 final String key = (prefix > 0 ? name.substring(0, prefix) : name) + bits + name; 20763 final String output = bits + " " + name; 20764 found.put(key, output); 20765 } 20766} 20767