View.java revision 06f37728b92450035a256504fe4e289d058861ef
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.annotation.IntDef; 20import android.annotation.NonNull; 21import android.annotation.Nullable; 22import android.content.ClipData; 23import android.content.Context; 24import android.content.res.Configuration; 25import android.content.res.Resources; 26import android.content.res.TypedArray; 27import android.graphics.Bitmap; 28import android.graphics.Camera; 29import android.graphics.Canvas; 30import android.graphics.Insets; 31import android.graphics.Interpolator; 32import android.graphics.LinearGradient; 33import android.graphics.Matrix; 34import android.graphics.Paint; 35import android.graphics.PixelFormat; 36import android.graphics.Point; 37import android.graphics.PorterDuff; 38import android.graphics.PorterDuffXfermode; 39import android.graphics.Rect; 40import android.graphics.RectF; 41import android.graphics.Region; 42import android.graphics.Shader; 43import android.graphics.drawable.ColorDrawable; 44import android.graphics.drawable.Drawable; 45import android.hardware.display.DisplayManagerGlobal; 46import android.os.Bundle; 47import android.os.Handler; 48import android.os.IBinder; 49import android.os.Parcel; 50import android.os.Parcelable; 51import android.os.RemoteException; 52import android.os.SystemClock; 53import android.os.SystemProperties; 54import android.text.TextUtils; 55import android.util.AttributeSet; 56import android.util.FloatProperty; 57import android.util.LayoutDirection; 58import android.util.Log; 59import android.util.LongSparseLongArray; 60import android.util.Pools.SynchronizedPool; 61import android.util.Property; 62import android.util.SparseArray; 63import android.util.SuperNotCalledException; 64import android.util.TypedValue; 65import android.view.ContextMenu.ContextMenuInfo; 66import android.view.AccessibilityIterators.TextSegmentIterator; 67import android.view.AccessibilityIterators.CharacterTextSegmentIterator; 68import android.view.AccessibilityIterators.WordTextSegmentIterator; 69import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; 70import android.view.accessibility.AccessibilityEvent; 71import android.view.accessibility.AccessibilityEventSource; 72import android.view.accessibility.AccessibilityManager; 73import android.view.accessibility.AccessibilityNodeInfo; 74import android.view.accessibility.AccessibilityNodeProvider; 75import android.view.animation.Animation; 76import android.view.animation.AnimationUtils; 77import android.view.animation.Transformation; 78import android.view.inputmethod.EditorInfo; 79import android.view.inputmethod.InputConnection; 80import android.view.inputmethod.InputMethodManager; 81import android.widget.ScrollBarDrawable; 82 83import static android.os.Build.VERSION_CODES.*; 84import static java.lang.Math.max; 85 86import com.android.internal.R; 87import com.android.internal.util.Predicate; 88import com.android.internal.view.menu.MenuBuilder; 89import com.google.android.collect.Lists; 90import com.google.android.collect.Maps; 91 92import java.lang.annotation.Retention; 93import java.lang.annotation.RetentionPolicy; 94import java.lang.ref.WeakReference; 95import java.lang.reflect.Field; 96import java.lang.reflect.InvocationTargetException; 97import java.lang.reflect.Method; 98import java.lang.reflect.Modifier; 99import java.util.ArrayList; 100import java.util.Arrays; 101import java.util.Collections; 102import java.util.HashMap; 103import java.util.Locale; 104import java.util.concurrent.CopyOnWriteArrayList; 105import java.util.concurrent.atomic.AtomicInteger; 106 107/** 108 * <p> 109 * This class represents the basic building block for user interface components. A View 110 * occupies a rectangular area on the screen and is responsible for drawing and 111 * event handling. View is the base class for <em>widgets</em>, which are 112 * used to create interactive UI components (buttons, text fields, etc.). The 113 * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which 114 * are invisible containers that hold other Views (or other ViewGroups) and define 115 * their layout properties. 116 * </p> 117 * 118 * <div class="special reference"> 119 * <h3>Developer Guides</h3> 120 * <p>For information about using this class to develop your application's user interface, 121 * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. 122 * </div> 123 * 124 * <a name="Using"></a> 125 * <h3>Using Views</h3> 126 * <p> 127 * All of the views in a window are arranged in a single tree. You can add views 128 * either from code or by specifying a tree of views in one or more XML layout 129 * files. There are many specialized subclasses of views that act as controls or 130 * are capable of displaying text, images, or other content. 131 * </p> 132 * <p> 133 * Once you have created a tree of views, there are typically a few types of 134 * common operations you may wish to perform: 135 * <ul> 136 * <li><strong>Set properties:</strong> for example setting the text of a 137 * {@link android.widget.TextView}. The available properties and the methods 138 * that set them will vary among the different subclasses of views. Note that 139 * properties that are known at build time can be set in the XML layout 140 * files.</li> 141 * <li><strong>Set focus:</strong> The framework will handled moving focus in 142 * response to user input. To force focus to a specific view, call 143 * {@link #requestFocus}.</li> 144 * <li><strong>Set up listeners:</strong> Views allow clients to set listeners 145 * that will be notified when something interesting happens to the view. For 146 * example, all views will let you set a listener to be notified when the view 147 * gains or loses focus. You can register such a listener using 148 * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. 149 * Other view subclasses offer more specialized listeners. For example, a Button 150 * exposes a listener to notify clients when the button is clicked.</li> 151 * <li><strong>Set visibility:</strong> You can hide or show views using 152 * {@link #setVisibility(int)}.</li> 153 * </ul> 154 * </p> 155 * <p><em> 156 * Note: The Android framework is responsible for measuring, laying out and 157 * drawing views. You should not call methods that perform these actions on 158 * views yourself unless you are actually implementing a 159 * {@link android.view.ViewGroup}. 160 * </em></p> 161 * 162 * <a name="Lifecycle"></a> 163 * <h3>Implementing a Custom View</h3> 164 * 165 * <p> 166 * To implement a custom view, you will usually begin by providing overrides for 167 * some of the standard methods that the framework calls on all views. You do 168 * not need to override all of these methods. In fact, you can start by just 169 * overriding {@link #onDraw(android.graphics.Canvas)}. 170 * <table border="2" width="85%" align="center" cellpadding="5"> 171 * <thead> 172 * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> 173 * </thead> 174 * 175 * <tbody> 176 * <tr> 177 * <td rowspan="2">Creation</td> 178 * <td>Constructors</td> 179 * <td>There is a form of the constructor that are called when the view 180 * is created from code and a form that is called when the view is 181 * inflated from a layout file. The second form should parse and apply 182 * any attributes defined in the layout file. 183 * </td> 184 * </tr> 185 * <tr> 186 * <td><code>{@link #onFinishInflate()}</code></td> 187 * <td>Called after a view and all of its children has been inflated 188 * from XML.</td> 189 * </tr> 190 * 191 * <tr> 192 * <td rowspan="3">Layout</td> 193 * <td><code>{@link #onMeasure(int, int)}</code></td> 194 * <td>Called to determine the size requirements for this view and all 195 * of its children. 196 * </td> 197 * </tr> 198 * <tr> 199 * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> 200 * <td>Called when this view should assign a size and position to all 201 * of its children. 202 * </td> 203 * </tr> 204 * <tr> 205 * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> 206 * <td>Called when the size of this view has changed. 207 * </td> 208 * </tr> 209 * 210 * <tr> 211 * <td>Drawing</td> 212 * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> 213 * <td>Called when the view should render its content. 214 * </td> 215 * </tr> 216 * 217 * <tr> 218 * <td rowspan="4">Event processing</td> 219 * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> 220 * <td>Called when a new hardware key event occurs. 221 * </td> 222 * </tr> 223 * <tr> 224 * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> 225 * <td>Called when a hardware key up event occurs. 226 * </td> 227 * </tr> 228 * <tr> 229 * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> 230 * <td>Called when a trackball motion event occurs. 231 * </td> 232 * </tr> 233 * <tr> 234 * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> 235 * <td>Called when a touch screen motion event occurs. 236 * </td> 237 * </tr> 238 * 239 * <tr> 240 * <td rowspan="2">Focus</td> 241 * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> 242 * <td>Called when the view gains or loses focus. 243 * </td> 244 * </tr> 245 * 246 * <tr> 247 * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> 248 * <td>Called when the window containing the view gains or loses focus. 249 * </td> 250 * </tr> 251 * 252 * <tr> 253 * <td rowspan="3">Attaching</td> 254 * <td><code>{@link #onAttachedToWindow()}</code></td> 255 * <td>Called when the view is attached to a window. 256 * </td> 257 * </tr> 258 * 259 * <tr> 260 * <td><code>{@link #onDetachedFromWindow}</code></td> 261 * <td>Called when the view is detached from its window. 262 * </td> 263 * </tr> 264 * 265 * <tr> 266 * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> 267 * <td>Called when the visibility of the window containing the view 268 * has changed. 269 * </td> 270 * </tr> 271 * </tbody> 272 * 273 * </table> 274 * </p> 275 * 276 * <a name="IDs"></a> 277 * <h3>IDs</h3> 278 * Views may have an integer id associated with them. These ids are typically 279 * assigned in the layout XML files, and are used to find specific views within 280 * the view tree. A common pattern is to: 281 * <ul> 282 * <li>Define a Button in the layout file and assign it a unique ID. 283 * <pre> 284 * <Button 285 * android:id="@+id/my_button" 286 * android:layout_width="wrap_content" 287 * android:layout_height="wrap_content" 288 * android:text="@string/my_button_text"/> 289 * </pre></li> 290 * <li>From the onCreate method of an Activity, find the Button 291 * <pre class="prettyprint"> 292 * Button myButton = (Button) findViewById(R.id.my_button); 293 * </pre></li> 294 * </ul> 295 * <p> 296 * View IDs need not be unique throughout the tree, but it is good practice to 297 * ensure that they are at least unique within the part of the tree you are 298 * searching. 299 * </p> 300 * 301 * <a name="Position"></a> 302 * <h3>Position</h3> 303 * <p> 304 * The geometry of a view is that of a rectangle. A view has a location, 305 * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and 306 * two dimensions, expressed as a width and a height. The unit for location 307 * and dimensions is the pixel. 308 * </p> 309 * 310 * <p> 311 * It is possible to retrieve the location of a view by invoking the methods 312 * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, 313 * coordinate of the rectangle representing the view. The latter returns the 314 * top, or Y, coordinate of the rectangle representing the view. These methods 315 * both return the location of the view relative to its parent. For instance, 316 * when getLeft() returns 20, that means the view is located 20 pixels to the 317 * right of the left edge of its direct parent. 318 * </p> 319 * 320 * <p> 321 * In addition, several convenience methods are offered to avoid unnecessary 322 * computations, namely {@link #getRight()} and {@link #getBottom()}. 323 * These methods return the coordinates of the right and bottom edges of the 324 * rectangle representing the view. For instance, calling {@link #getRight()} 325 * is similar to the following computation: <code>getLeft() + getWidth()</code> 326 * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) 327 * </p> 328 * 329 * <a name="SizePaddingMargins"></a> 330 * <h3>Size, padding and margins</h3> 331 * <p> 332 * The size of a view is expressed with a width and a height. A view actually 333 * possess two pairs of width and height values. 334 * </p> 335 * 336 * <p> 337 * The first pair is known as <em>measured width</em> and 338 * <em>measured height</em>. These dimensions define how big a view wants to be 339 * within its parent (see <a href="#Layout">Layout</a> for more details.) The 340 * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} 341 * and {@link #getMeasuredHeight()}. 342 * </p> 343 * 344 * <p> 345 * The second pair is simply known as <em>width</em> and <em>height</em>, or 346 * sometimes <em>drawing width</em> and <em>drawing height</em>. These 347 * dimensions define the actual size of the view on screen, at drawing time and 348 * after layout. These values may, but do not have to, be different from the 349 * measured width and height. The width and height can be obtained by calling 350 * {@link #getWidth()} and {@link #getHeight()}. 351 * </p> 352 * 353 * <p> 354 * To measure its dimensions, a view takes into account its padding. The padding 355 * is expressed in pixels for the left, top, right and bottom parts of the view. 356 * Padding can be used to offset the content of the view by a specific amount of 357 * pixels. For instance, a left padding of 2 will push the view's content by 358 * 2 pixels to the right of the left edge. Padding can be set using the 359 * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} 360 * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, 361 * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, 362 * {@link #getPaddingEnd()}. 363 * </p> 364 * 365 * <p> 366 * Even though a view can define a padding, it does not provide any support for 367 * margins. However, view groups provide such a support. Refer to 368 * {@link android.view.ViewGroup} and 369 * {@link android.view.ViewGroup.MarginLayoutParams} for further information. 370 * </p> 371 * 372 * <a name="Layout"></a> 373 * <h3>Layout</h3> 374 * <p> 375 * Layout is a two pass process: a measure pass and a layout pass. The measuring 376 * pass is implemented in {@link #measure(int, int)} and is a top-down traversal 377 * of the view tree. Each view pushes dimension specifications down the tree 378 * during the recursion. At the end of the measure pass, every view has stored 379 * its measurements. The second pass happens in 380 * {@link #layout(int,int,int,int)} and is also top-down. During 381 * this pass each parent is responsible for positioning all of its children 382 * using the sizes computed in the measure pass. 383 * </p> 384 * 385 * <p> 386 * When a view's measure() method returns, its {@link #getMeasuredWidth()} and 387 * {@link #getMeasuredHeight()} values must be set, along with those for all of 388 * that view's descendants. A view's measured width and measured height values 389 * must respect the constraints imposed by the view's parents. This guarantees 390 * that at the end of the measure pass, all parents accept all of their 391 * children's measurements. A parent view may call measure() more than once on 392 * its children. For example, the parent may measure each child once with 393 * unspecified dimensions to find out how big they want to be, then call 394 * measure() on them again with actual numbers if the sum of all the children's 395 * unconstrained sizes is too big or too small. 396 * </p> 397 * 398 * <p> 399 * The measure pass uses two classes to communicate dimensions. The 400 * {@link MeasureSpec} class is used by views to tell their parents how they 401 * want to be measured and positioned. The base LayoutParams class just 402 * describes how big the view wants to be for both width and height. For each 403 * dimension, it can specify one of: 404 * <ul> 405 * <li> an exact number 406 * <li>MATCH_PARENT, which means the view wants to be as big as its parent 407 * (minus padding) 408 * <li> WRAP_CONTENT, which means that the view wants to be just big enough to 409 * enclose its content (plus padding). 410 * </ul> 411 * There are subclasses of LayoutParams for different subclasses of ViewGroup. 412 * For example, AbsoluteLayout has its own subclass of LayoutParams which adds 413 * an X and Y value. 414 * </p> 415 * 416 * <p> 417 * MeasureSpecs are used to push requirements down the tree from parent to 418 * child. A MeasureSpec can be in one of three modes: 419 * <ul> 420 * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension 421 * of a child view. For example, a LinearLayout may call measure() on its child 422 * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how 423 * tall the child view wants to be given a width of 240 pixels. 424 * <li>EXACTLY: This is used by the parent to impose an exact size on the 425 * child. The child must use this size, and guarantee that all of its 426 * descendants will fit within this size. 427 * <li>AT_MOST: This is used by the parent to impose a maximum size on the 428 * child. The child must gurantee that it and all of its descendants will fit 429 * within this size. 430 * </ul> 431 * </p> 432 * 433 * <p> 434 * To intiate a layout, call {@link #requestLayout}. This method is typically 435 * called by a view on itself when it believes that is can no longer fit within 436 * its current bounds. 437 * </p> 438 * 439 * <a name="Drawing"></a> 440 * <h3>Drawing</h3> 441 * <p> 442 * Drawing is handled by walking the tree and rendering each view that 443 * intersects the invalid region. Because the tree is traversed in-order, 444 * this means that parents will draw before (i.e., behind) their children, with 445 * siblings drawn in the order they appear in the tree. 446 * If you set a background drawable for a View, then the View will draw it for you 447 * before calling back to its <code>onDraw()</code> method. 448 * </p> 449 * 450 * <p> 451 * Note that the framework will not draw views that are not in the invalid region. 452 * </p> 453 * 454 * <p> 455 * To force a view to draw, call {@link #invalidate()}. 456 * </p> 457 * 458 * <a name="EventHandlingThreading"></a> 459 * <h3>Event Handling and Threading</h3> 460 * <p> 461 * The basic cycle of a view is as follows: 462 * <ol> 463 * <li>An event comes in and is dispatched to the appropriate view. The view 464 * handles the event and notifies any listeners.</li> 465 * <li>If in the course of processing the event, the view's bounds may need 466 * to be changed, the view will call {@link #requestLayout()}.</li> 467 * <li>Similarly, if in the course of processing the event the view's appearance 468 * may need to be changed, the view will call {@link #invalidate()}.</li> 469 * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, 470 * the framework will take care of measuring, laying out, and drawing the tree 471 * as appropriate.</li> 472 * </ol> 473 * </p> 474 * 475 * <p><em>Note: The entire view tree is single threaded. You must always be on 476 * the UI thread when calling any method on any view.</em> 477 * If you are doing work on other threads and want to update the state of a view 478 * from that thread, you should use a {@link Handler}. 479 * </p> 480 * 481 * <a name="FocusHandling"></a> 482 * <h3>Focus Handling</h3> 483 * <p> 484 * The framework will handle routine focus movement in response to user input. 485 * This includes changing the focus as views are removed or hidden, or as new 486 * views become available. Views indicate their willingness to take focus 487 * through the {@link #isFocusable} method. To change whether a view can take 488 * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) 489 * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} 490 * and can change this via {@link #setFocusableInTouchMode(boolean)}. 491 * </p> 492 * <p> 493 * Focus movement is based on an algorithm which finds the nearest neighbor in a 494 * given direction. In rare cases, the default algorithm may not match the 495 * intended behavior of the developer. In these situations, you can provide 496 * explicit overrides by using these XML attributes in the layout file: 497 * <pre> 498 * nextFocusDown 499 * nextFocusLeft 500 * nextFocusRight 501 * nextFocusUp 502 * </pre> 503 * </p> 504 * 505 * 506 * <p> 507 * To get a particular view to take focus, call {@link #requestFocus()}. 508 * </p> 509 * 510 * <a name="TouchMode"></a> 511 * <h3>Touch Mode</h3> 512 * <p> 513 * When a user is navigating a user interface via directional keys such as a D-pad, it is 514 * necessary to give focus to actionable items such as buttons so the user can see 515 * what will take input. If the device has touch capabilities, however, and the user 516 * begins interacting with the interface by touching it, it is no longer necessary to 517 * always highlight, or give focus to, a particular view. This motivates a mode 518 * for interaction named 'touch mode'. 519 * </p> 520 * <p> 521 * For a touch capable device, once the user touches the screen, the device 522 * will enter touch mode. From this point onward, only views for which 523 * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. 524 * Other views that are touchable, like buttons, will not take focus when touched; they will 525 * only fire the on click listeners. 526 * </p> 527 * <p> 528 * Any time a user hits a directional key, such as a D-pad direction, the view device will 529 * exit touch mode, and find a view to take focus, so that the user may resume interacting 530 * with the user interface without touching the screen again. 531 * </p> 532 * <p> 533 * The touch mode state is maintained across {@link android.app.Activity}s. Call 534 * {@link #isInTouchMode} to see whether the device is currently in touch mode. 535 * </p> 536 * 537 * <a name="Scrolling"></a> 538 * <h3>Scrolling</h3> 539 * <p> 540 * The framework provides basic support for views that wish to internally 541 * scroll their content. This includes keeping track of the X and Y scroll 542 * offset as well as mechanisms for drawing scrollbars. See 543 * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and 544 * {@link #awakenScrollBars()} for more details. 545 * </p> 546 * 547 * <a name="Tags"></a> 548 * <h3>Tags</h3> 549 * <p> 550 * Unlike IDs, tags are not used to identify views. Tags are essentially an 551 * extra piece of information that can be associated with a view. They are most 552 * often used as a convenience to store data related to views in the views 553 * themselves rather than by putting them in a separate structure. 554 * </p> 555 * 556 * <a name="Properties"></a> 557 * <h3>Properties</h3> 558 * <p> 559 * The View class exposes an {@link #ALPHA} property, as well as several transform-related 560 * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are 561 * available both in the {@link Property} form as well as in similarly-named setter/getter 562 * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can 563 * be used to set persistent state associated with these rendering-related properties on the view. 564 * The properties and methods can also be used in conjunction with 565 * {@link android.animation.Animator Animator}-based animations, described more in the 566 * <a href="#Animation">Animation</a> section. 567 * </p> 568 * 569 * <a name="Animation"></a> 570 * <h3>Animation</h3> 571 * <p> 572 * Starting with Android 3.0, the preferred way of animating views is to use the 573 * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based 574 * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and 575 * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 576 * {@link android.view.animation.Animation Animation}-based classes, which instead animate only 577 * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class 578 * makes animating these View properties particularly easy and efficient. 579 * </p> 580 * <p> 581 * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. 582 * You can attach an {@link Animation} object to a view using 583 * {@link #setAnimation(Animation)} or 584 * {@link #startAnimation(Animation)}. The animation can alter the scale, 585 * rotation, translation and alpha of a view over time. If the animation is 586 * attached to a view that has children, the animation will affect the entire 587 * subtree rooted by that node. When an animation is started, the framework will 588 * take care of redrawing the appropriate views until the animation completes. 589 * </p> 590 * 591 * <a name="Security"></a> 592 * <h3>Security</h3> 593 * <p> 594 * Sometimes it is essential that an application be able to verify that an action 595 * is being performed with the full knowledge and consent of the user, such as 596 * granting a permission request, making a purchase or clicking on an advertisement. 597 * Unfortunately, a malicious application could try to spoof the user into 598 * performing these actions, unaware, by concealing the intended purpose of the view. 599 * As a remedy, the framework offers a touch filtering mechanism that can be used to 600 * improve the security of views that provide access to sensitive functionality. 601 * </p><p> 602 * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the 603 * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework 604 * will discard touches that are received whenever the view's window is obscured by 605 * another visible window. As a result, the view will not receive touches whenever a 606 * toast, dialog or other window appears above the view's window. 607 * </p><p> 608 * For more fine-grained control over security, consider overriding the 609 * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own 610 * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. 611 * </p> 612 * 613 * @attr ref android.R.styleable#View_alpha 614 * @attr ref android.R.styleable#View_background 615 * @attr ref android.R.styleable#View_clickable 616 * @attr ref android.R.styleable#View_contentDescription 617 * @attr ref android.R.styleable#View_drawingCacheQuality 618 * @attr ref android.R.styleable#View_duplicateParentState 619 * @attr ref android.R.styleable#View_id 620 * @attr ref android.R.styleable#View_requiresFadingEdge 621 * @attr ref android.R.styleable#View_fadeScrollbars 622 * @attr ref android.R.styleable#View_fadingEdgeLength 623 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 624 * @attr ref android.R.styleable#View_fitsSystemWindows 625 * @attr ref android.R.styleable#View_isScrollContainer 626 * @attr ref android.R.styleable#View_focusable 627 * @attr ref android.R.styleable#View_focusableInTouchMode 628 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 629 * @attr ref android.R.styleable#View_keepScreenOn 630 * @attr ref android.R.styleable#View_layerType 631 * @attr ref android.R.styleable#View_layoutDirection 632 * @attr ref android.R.styleable#View_longClickable 633 * @attr ref android.R.styleable#View_minHeight 634 * @attr ref android.R.styleable#View_minWidth 635 * @attr ref android.R.styleable#View_nextFocusDown 636 * @attr ref android.R.styleable#View_nextFocusLeft 637 * @attr ref android.R.styleable#View_nextFocusRight 638 * @attr ref android.R.styleable#View_nextFocusUp 639 * @attr ref android.R.styleable#View_onClick 640 * @attr ref android.R.styleable#View_padding 641 * @attr ref android.R.styleable#View_paddingBottom 642 * @attr ref android.R.styleable#View_paddingLeft 643 * @attr ref android.R.styleable#View_paddingRight 644 * @attr ref android.R.styleable#View_paddingTop 645 * @attr ref android.R.styleable#View_paddingStart 646 * @attr ref android.R.styleable#View_paddingEnd 647 * @attr ref android.R.styleable#View_saveEnabled 648 * @attr ref android.R.styleable#View_rotation 649 * @attr ref android.R.styleable#View_rotationX 650 * @attr ref android.R.styleable#View_rotationY 651 * @attr ref android.R.styleable#View_scaleX 652 * @attr ref android.R.styleable#View_scaleY 653 * @attr ref android.R.styleable#View_scrollX 654 * @attr ref android.R.styleable#View_scrollY 655 * @attr ref android.R.styleable#View_scrollbarSize 656 * @attr ref android.R.styleable#View_scrollbarStyle 657 * @attr ref android.R.styleable#View_scrollbars 658 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 659 * @attr ref android.R.styleable#View_scrollbarFadeDuration 660 * @attr ref android.R.styleable#View_scrollbarTrackHorizontal 661 * @attr ref android.R.styleable#View_scrollbarThumbHorizontal 662 * @attr ref android.R.styleable#View_scrollbarThumbVertical 663 * @attr ref android.R.styleable#View_scrollbarTrackVertical 664 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack 665 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack 666 * @attr ref android.R.styleable#View_soundEffectsEnabled 667 * @attr ref android.R.styleable#View_tag 668 * @attr ref android.R.styleable#View_textAlignment 669 * @attr ref android.R.styleable#View_textDirection 670 * @attr ref android.R.styleable#View_transformPivotX 671 * @attr ref android.R.styleable#View_transformPivotY 672 * @attr ref android.R.styleable#View_translationX 673 * @attr ref android.R.styleable#View_translationY 674 * @attr ref android.R.styleable#View_visibility 675 * 676 * @see android.view.ViewGroup 677 */ 678public class View implements Drawable.Callback, KeyEvent.Callback, 679 AccessibilityEventSource { 680 private static final boolean DBG = false; 681 682 /** 683 * The logging tag used by this class with android.util.Log. 684 */ 685 protected static final String VIEW_LOG_TAG = "View"; 686 687 /** 688 * When set to true, apps will draw debugging information about their layouts. 689 * 690 * @hide 691 */ 692 public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; 693 694 /** 695 * Used to mark a View that has no ID. 696 */ 697 public static final int NO_ID = -1; 698 699 /** 700 * Signals that compatibility booleans have been initialized according to 701 * target SDK versions. 702 */ 703 private static boolean sCompatibilityDone = false; 704 705 /** 706 * Use the old (broken) way of building MeasureSpecs. 707 */ 708 private static boolean sUseBrokenMakeMeasureSpec = false; 709 710 /** 711 * Ignore any optimizations using the measure cache. 712 */ 713 private static boolean sIgnoreMeasureCache = false; 714 715 /** 716 * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when 717 * calling setFlags. 718 */ 719 private static final int NOT_FOCUSABLE = 0x00000000; 720 721 /** 722 * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling 723 * setFlags. 724 */ 725 private static final int FOCUSABLE = 0x00000001; 726 727 /** 728 * Mask for use with setFlags indicating bits used for focus. 729 */ 730 private static final int FOCUSABLE_MASK = 0x00000001; 731 732 /** 733 * This view will adjust its padding to fit sytem windows (e.g. status bar) 734 */ 735 private static final int FITS_SYSTEM_WINDOWS = 0x00000002; 736 737 /** @hide */ 738 @IntDef({VISIBLE, INVISIBLE, GONE}) 739 @Retention(RetentionPolicy.SOURCE) 740 public @interface Visibility {} 741 742 /** 743 * This view is visible. 744 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 745 * android:visibility}. 746 */ 747 public static final int VISIBLE = 0x00000000; 748 749 /** 750 * This view is invisible, but it still takes up space for layout purposes. 751 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 752 * android:visibility}. 753 */ 754 public static final int INVISIBLE = 0x00000004; 755 756 /** 757 * This view is invisible, and it doesn't take any space for layout 758 * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 759 * android:visibility}. 760 */ 761 public static final int GONE = 0x00000008; 762 763 /** 764 * Mask for use with setFlags indicating bits used for visibility. 765 * {@hide} 766 */ 767 static final int VISIBILITY_MASK = 0x0000000C; 768 769 private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; 770 771 /** 772 * This view is enabled. Interpretation varies by subclass. 773 * Use with ENABLED_MASK when calling setFlags. 774 * {@hide} 775 */ 776 static final int ENABLED = 0x00000000; 777 778 /** 779 * This view is disabled. Interpretation varies by subclass. 780 * Use with ENABLED_MASK when calling setFlags. 781 * {@hide} 782 */ 783 static final int DISABLED = 0x00000020; 784 785 /** 786 * Mask for use with setFlags indicating bits used for indicating whether 787 * this view is enabled 788 * {@hide} 789 */ 790 static final int ENABLED_MASK = 0x00000020; 791 792 /** 793 * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be 794 * called and further optimizations will be performed. It is okay to have 795 * this flag set and a background. Use with DRAW_MASK when calling setFlags. 796 * {@hide} 797 */ 798 static final int WILL_NOT_DRAW = 0x00000080; 799 800 /** 801 * Mask for use with setFlags indicating bits used for indicating whether 802 * this view is will draw 803 * {@hide} 804 */ 805 static final int DRAW_MASK = 0x00000080; 806 807 /** 808 * <p>This view doesn't show scrollbars.</p> 809 * {@hide} 810 */ 811 static final int SCROLLBARS_NONE = 0x00000000; 812 813 /** 814 * <p>This view shows horizontal scrollbars.</p> 815 * {@hide} 816 */ 817 static final int SCROLLBARS_HORIZONTAL = 0x00000100; 818 819 /** 820 * <p>This view shows vertical scrollbars.</p> 821 * {@hide} 822 */ 823 static final int SCROLLBARS_VERTICAL = 0x00000200; 824 825 /** 826 * <p>Mask for use with setFlags indicating bits used for indicating which 827 * scrollbars are enabled.</p> 828 * {@hide} 829 */ 830 static final int SCROLLBARS_MASK = 0x00000300; 831 832 /** 833 * Indicates that the view should filter touches when its window is obscured. 834 * Refer to the class comments for more information about this security feature. 835 * {@hide} 836 */ 837 static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; 838 839 /** 840 * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate 841 * that they are optional and should be skipped if the window has 842 * requested system UI flags that ignore those insets for layout. 843 */ 844 static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; 845 846 /** 847 * <p>This view doesn't show fading edges.</p> 848 * {@hide} 849 */ 850 static final int FADING_EDGE_NONE = 0x00000000; 851 852 /** 853 * <p>This view shows horizontal fading edges.</p> 854 * {@hide} 855 */ 856 static final int FADING_EDGE_HORIZONTAL = 0x00001000; 857 858 /** 859 * <p>This view shows vertical fading edges.</p> 860 * {@hide} 861 */ 862 static final int FADING_EDGE_VERTICAL = 0x00002000; 863 864 /** 865 * <p>Mask for use with setFlags indicating bits used for indicating which 866 * fading edges are enabled.</p> 867 * {@hide} 868 */ 869 static final int FADING_EDGE_MASK = 0x00003000; 870 871 /** 872 * <p>Indicates this view can be clicked. When clickable, a View reacts 873 * to clicks by notifying the OnClickListener.<p> 874 * {@hide} 875 */ 876 static final int CLICKABLE = 0x00004000; 877 878 /** 879 * <p>Indicates this view is caching its drawing into a bitmap.</p> 880 * {@hide} 881 */ 882 static final int DRAWING_CACHE_ENABLED = 0x00008000; 883 884 /** 885 * <p>Indicates that no icicle should be saved for this view.<p> 886 * {@hide} 887 */ 888 static final int SAVE_DISABLED = 0x000010000; 889 890 /** 891 * <p>Mask for use with setFlags indicating bits used for the saveEnabled 892 * property.</p> 893 * {@hide} 894 */ 895 static final int SAVE_DISABLED_MASK = 0x000010000; 896 897 /** 898 * <p>Indicates that no drawing cache should ever be created for this view.<p> 899 * {@hide} 900 */ 901 static final int WILL_NOT_CACHE_DRAWING = 0x000020000; 902 903 /** 904 * <p>Indicates this view can take / keep focus when int touch mode.</p> 905 * {@hide} 906 */ 907 static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; 908 909 /** @hide */ 910 @Retention(RetentionPolicy.SOURCE) 911 @IntDef({DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_AUTO}) 912 public @interface DrawingCacheQuality {} 913 914 /** 915 * <p>Enables low quality mode for the drawing cache.</p> 916 */ 917 public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; 918 919 /** 920 * <p>Enables high quality mode for the drawing cache.</p> 921 */ 922 public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; 923 924 /** 925 * <p>Enables automatic quality mode for the drawing cache.</p> 926 */ 927 public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; 928 929 private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { 930 DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH 931 }; 932 933 /** 934 * <p>Mask for use with setFlags indicating bits used for the cache 935 * quality property.</p> 936 * {@hide} 937 */ 938 static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; 939 940 /** 941 * <p> 942 * Indicates this view can be long clicked. When long clickable, a View 943 * reacts to long clicks by notifying the OnLongClickListener or showing a 944 * context menu. 945 * </p> 946 * {@hide} 947 */ 948 static final int LONG_CLICKABLE = 0x00200000; 949 950 /** 951 * <p>Indicates that this view gets its drawable states from its direct parent 952 * and ignores its original internal states.</p> 953 * 954 * @hide 955 */ 956 static final int DUPLICATE_PARENT_STATE = 0x00400000; 957 958 /** @hide */ 959 @IntDef({ 960 SCROLLBARS_INSIDE_OVERLAY, 961 SCROLLBARS_INSIDE_INSET, 962 SCROLLBARS_OUTSIDE_OVERLAY, 963 SCROLLBARS_OUTSIDE_INSET 964 }) 965 @Retention(RetentionPolicy.SOURCE) 966 public @interface ScrollBarStyle {} 967 968 /** 969 * The scrollbar style to display the scrollbars inside the content area, 970 * without increasing the padding. The scrollbars will be overlaid with 971 * translucency on the view's content. 972 */ 973 public static final int SCROLLBARS_INSIDE_OVERLAY = 0; 974 975 /** 976 * The scrollbar style to display the scrollbars inside the padded area, 977 * increasing the padding of the view. The scrollbars will not overlap the 978 * content area of the view. 979 */ 980 public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; 981 982 /** 983 * The scrollbar style to display the scrollbars at the edge of the view, 984 * without increasing the padding. The scrollbars will be overlaid with 985 * translucency. 986 */ 987 public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; 988 989 /** 990 * The scrollbar style to display the scrollbars at the edge of the view, 991 * increasing the padding of the view. The scrollbars will only overlap the 992 * background, if any. 993 */ 994 public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; 995 996 /** 997 * Mask to check if the scrollbar style is overlay or inset. 998 * {@hide} 999 */ 1000 static final int SCROLLBARS_INSET_MASK = 0x01000000; 1001 1002 /** 1003 * Mask to check if the scrollbar style is inside or outside. 1004 * {@hide} 1005 */ 1006 static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; 1007 1008 /** 1009 * Mask for scrollbar style. 1010 * {@hide} 1011 */ 1012 static final int SCROLLBARS_STYLE_MASK = 0x03000000; 1013 1014 /** 1015 * View flag indicating that the screen should remain on while the 1016 * window containing this view is visible to the user. This effectively 1017 * takes care of automatically setting the WindowManager's 1018 * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. 1019 */ 1020 public static final int KEEP_SCREEN_ON = 0x04000000; 1021 1022 /** 1023 * View flag indicating whether this view should have sound effects enabled 1024 * for events such as clicking and touching. 1025 */ 1026 public static final int SOUND_EFFECTS_ENABLED = 0x08000000; 1027 1028 /** 1029 * View flag indicating whether this view should have haptic feedback 1030 * enabled for events such as long presses. 1031 */ 1032 public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; 1033 1034 /** 1035 * <p>Indicates that the view hierarchy should stop saving state when 1036 * it reaches this view. If state saving is initiated immediately at 1037 * the view, it will be allowed. 1038 * {@hide} 1039 */ 1040 static final int PARENT_SAVE_DISABLED = 0x20000000; 1041 1042 /** 1043 * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> 1044 * {@hide} 1045 */ 1046 static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; 1047 1048 /** @hide */ 1049 @IntDef(flag = true, 1050 value = { 1051 FOCUSABLES_ALL, 1052 FOCUSABLES_TOUCH_MODE 1053 }) 1054 @Retention(RetentionPolicy.SOURCE) 1055 public @interface FocusableMode {} 1056 1057 /** 1058 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1059 * should add all focusable Views regardless if they are focusable in touch mode. 1060 */ 1061 public static final int FOCUSABLES_ALL = 0x00000000; 1062 1063 /** 1064 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1065 * should add only Views focusable in touch mode. 1066 */ 1067 public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; 1068 1069 /** @hide */ 1070 @IntDef({ 1071 FOCUS_BACKWARD, 1072 FOCUS_FORWARD, 1073 FOCUS_LEFT, 1074 FOCUS_UP, 1075 FOCUS_RIGHT, 1076 FOCUS_DOWN 1077 }) 1078 @Retention(RetentionPolicy.SOURCE) 1079 public @interface FocusDirection {} 1080 1081 /** @hide */ 1082 @IntDef({ 1083 FOCUS_LEFT, 1084 FOCUS_UP, 1085 FOCUS_RIGHT, 1086 FOCUS_DOWN 1087 }) 1088 @Retention(RetentionPolicy.SOURCE) 1089 public @interface FocusRealDirection {} // Like @FocusDirection, but without forward/backward 1090 1091 /** 1092 * Use with {@link #focusSearch(int)}. Move focus to the previous selectable 1093 * item. 1094 */ 1095 public static final int FOCUS_BACKWARD = 0x00000001; 1096 1097 /** 1098 * Use with {@link #focusSearch(int)}. Move focus to the next selectable 1099 * item. 1100 */ 1101 public static final int FOCUS_FORWARD = 0x00000002; 1102 1103 /** 1104 * Use with {@link #focusSearch(int)}. Move focus to the left. 1105 */ 1106 public static final int FOCUS_LEFT = 0x00000011; 1107 1108 /** 1109 * Use with {@link #focusSearch(int)}. Move focus up. 1110 */ 1111 public static final int FOCUS_UP = 0x00000021; 1112 1113 /** 1114 * Use with {@link #focusSearch(int)}. Move focus to the right. 1115 */ 1116 public static final int FOCUS_RIGHT = 0x00000042; 1117 1118 /** 1119 * Use with {@link #focusSearch(int)}. Move focus down. 1120 */ 1121 public static final int FOCUS_DOWN = 0x00000082; 1122 1123 /** 1124 * Bits of {@link #getMeasuredWidthAndState()} and 1125 * {@link #getMeasuredWidthAndState()} that provide the actual measured size. 1126 */ 1127 public static final int MEASURED_SIZE_MASK = 0x00ffffff; 1128 1129 /** 1130 * Bits of {@link #getMeasuredWidthAndState()} and 1131 * {@link #getMeasuredWidthAndState()} that provide the additional state bits. 1132 */ 1133 public static final int MEASURED_STATE_MASK = 0xff000000; 1134 1135 /** 1136 * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits 1137 * for functions that combine both width and height into a single int, 1138 * such as {@link #getMeasuredState()} and the childState argument of 1139 * {@link #resolveSizeAndState(int, int, int)}. 1140 */ 1141 public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; 1142 1143 /** 1144 * Bit of {@link #getMeasuredWidthAndState()} and 1145 * {@link #getMeasuredWidthAndState()} that indicates the measured size 1146 * is smaller that the space the view would like to have. 1147 */ 1148 public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; 1149 1150 /** 1151 * Base View state sets 1152 */ 1153 // Singles 1154 /** 1155 * Indicates the view has no states set. States are used with 1156 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1157 * view depending on its state. 1158 * 1159 * @see android.graphics.drawable.Drawable 1160 * @see #getDrawableState() 1161 */ 1162 protected static final int[] EMPTY_STATE_SET; 1163 /** 1164 * Indicates the view is enabled. States are used with 1165 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1166 * view depending on its state. 1167 * 1168 * @see android.graphics.drawable.Drawable 1169 * @see #getDrawableState() 1170 */ 1171 protected static final int[] ENABLED_STATE_SET; 1172 /** 1173 * Indicates the view is focused. States are used with 1174 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1175 * view depending on its state. 1176 * 1177 * @see android.graphics.drawable.Drawable 1178 * @see #getDrawableState() 1179 */ 1180 protected static final int[] FOCUSED_STATE_SET; 1181 /** 1182 * Indicates the view is selected. States are used with 1183 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1184 * view depending on its state. 1185 * 1186 * @see android.graphics.drawable.Drawable 1187 * @see #getDrawableState() 1188 */ 1189 protected static final int[] SELECTED_STATE_SET; 1190 /** 1191 * Indicates the view is pressed. States are used with 1192 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1193 * view depending on its state. 1194 * 1195 * @see android.graphics.drawable.Drawable 1196 * @see #getDrawableState() 1197 */ 1198 protected static final int[] PRESSED_STATE_SET; 1199 /** 1200 * Indicates the view's window has focus. States are used with 1201 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1202 * view depending on its state. 1203 * 1204 * @see android.graphics.drawable.Drawable 1205 * @see #getDrawableState() 1206 */ 1207 protected static final int[] WINDOW_FOCUSED_STATE_SET; 1208 // Doubles 1209 /** 1210 * Indicates the view is enabled and has the focus. 1211 * 1212 * @see #ENABLED_STATE_SET 1213 * @see #FOCUSED_STATE_SET 1214 */ 1215 protected static final int[] ENABLED_FOCUSED_STATE_SET; 1216 /** 1217 * Indicates the view is enabled and selected. 1218 * 1219 * @see #ENABLED_STATE_SET 1220 * @see #SELECTED_STATE_SET 1221 */ 1222 protected static final int[] ENABLED_SELECTED_STATE_SET; 1223 /** 1224 * Indicates the view is enabled and that its window has focus. 1225 * 1226 * @see #ENABLED_STATE_SET 1227 * @see #WINDOW_FOCUSED_STATE_SET 1228 */ 1229 protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; 1230 /** 1231 * Indicates the view is focused and selected. 1232 * 1233 * @see #FOCUSED_STATE_SET 1234 * @see #SELECTED_STATE_SET 1235 */ 1236 protected static final int[] FOCUSED_SELECTED_STATE_SET; 1237 /** 1238 * Indicates the view has the focus and that its window has the focus. 1239 * 1240 * @see #FOCUSED_STATE_SET 1241 * @see #WINDOW_FOCUSED_STATE_SET 1242 */ 1243 protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; 1244 /** 1245 * Indicates the view is selected and that its window has the focus. 1246 * 1247 * @see #SELECTED_STATE_SET 1248 * @see #WINDOW_FOCUSED_STATE_SET 1249 */ 1250 protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; 1251 // Triples 1252 /** 1253 * Indicates the view is enabled, focused and selected. 1254 * 1255 * @see #ENABLED_STATE_SET 1256 * @see #FOCUSED_STATE_SET 1257 * @see #SELECTED_STATE_SET 1258 */ 1259 protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; 1260 /** 1261 * Indicates the view is enabled, focused and its window has the focus. 1262 * 1263 * @see #ENABLED_STATE_SET 1264 * @see #FOCUSED_STATE_SET 1265 * @see #WINDOW_FOCUSED_STATE_SET 1266 */ 1267 protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1268 /** 1269 * Indicates the view is enabled, selected and its window has the focus. 1270 * 1271 * @see #ENABLED_STATE_SET 1272 * @see #SELECTED_STATE_SET 1273 * @see #WINDOW_FOCUSED_STATE_SET 1274 */ 1275 protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1276 /** 1277 * Indicates the view is focused, selected and its window has the focus. 1278 * 1279 * @see #FOCUSED_STATE_SET 1280 * @see #SELECTED_STATE_SET 1281 * @see #WINDOW_FOCUSED_STATE_SET 1282 */ 1283 protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1284 /** 1285 * Indicates the view is enabled, focused, selected and its window 1286 * has the focus. 1287 * 1288 * @see #ENABLED_STATE_SET 1289 * @see #FOCUSED_STATE_SET 1290 * @see #SELECTED_STATE_SET 1291 * @see #WINDOW_FOCUSED_STATE_SET 1292 */ 1293 protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1294 /** 1295 * Indicates the view is pressed and its window has the focus. 1296 * 1297 * @see #PRESSED_STATE_SET 1298 * @see #WINDOW_FOCUSED_STATE_SET 1299 */ 1300 protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; 1301 /** 1302 * Indicates the view is pressed and selected. 1303 * 1304 * @see #PRESSED_STATE_SET 1305 * @see #SELECTED_STATE_SET 1306 */ 1307 protected static final int[] PRESSED_SELECTED_STATE_SET; 1308 /** 1309 * Indicates the view is pressed, selected and its window has the focus. 1310 * 1311 * @see #PRESSED_STATE_SET 1312 * @see #SELECTED_STATE_SET 1313 * @see #WINDOW_FOCUSED_STATE_SET 1314 */ 1315 protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1316 /** 1317 * Indicates the view is pressed and focused. 1318 * 1319 * @see #PRESSED_STATE_SET 1320 * @see #FOCUSED_STATE_SET 1321 */ 1322 protected static final int[] PRESSED_FOCUSED_STATE_SET; 1323 /** 1324 * Indicates the view is pressed, focused and its window has the focus. 1325 * 1326 * @see #PRESSED_STATE_SET 1327 * @see #FOCUSED_STATE_SET 1328 * @see #WINDOW_FOCUSED_STATE_SET 1329 */ 1330 protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1331 /** 1332 * Indicates the view is pressed, focused and selected. 1333 * 1334 * @see #PRESSED_STATE_SET 1335 * @see #SELECTED_STATE_SET 1336 * @see #FOCUSED_STATE_SET 1337 */ 1338 protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; 1339 /** 1340 * Indicates the view is pressed, focused, selected and its window has the focus. 1341 * 1342 * @see #PRESSED_STATE_SET 1343 * @see #FOCUSED_STATE_SET 1344 * @see #SELECTED_STATE_SET 1345 * @see #WINDOW_FOCUSED_STATE_SET 1346 */ 1347 protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1348 /** 1349 * Indicates the view is pressed and enabled. 1350 * 1351 * @see #PRESSED_STATE_SET 1352 * @see #ENABLED_STATE_SET 1353 */ 1354 protected static final int[] PRESSED_ENABLED_STATE_SET; 1355 /** 1356 * Indicates the view is pressed, enabled and its window has the focus. 1357 * 1358 * @see #PRESSED_STATE_SET 1359 * @see #ENABLED_STATE_SET 1360 * @see #WINDOW_FOCUSED_STATE_SET 1361 */ 1362 protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; 1363 /** 1364 * Indicates the view is pressed, enabled and selected. 1365 * 1366 * @see #PRESSED_STATE_SET 1367 * @see #ENABLED_STATE_SET 1368 * @see #SELECTED_STATE_SET 1369 */ 1370 protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; 1371 /** 1372 * Indicates the view is pressed, enabled, selected and its window has the 1373 * focus. 1374 * 1375 * @see #PRESSED_STATE_SET 1376 * @see #ENABLED_STATE_SET 1377 * @see #SELECTED_STATE_SET 1378 * @see #WINDOW_FOCUSED_STATE_SET 1379 */ 1380 protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1381 /** 1382 * Indicates the view is pressed, enabled and focused. 1383 * 1384 * @see #PRESSED_STATE_SET 1385 * @see #ENABLED_STATE_SET 1386 * @see #FOCUSED_STATE_SET 1387 */ 1388 protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; 1389 /** 1390 * Indicates the view is pressed, enabled, focused and its window has the 1391 * focus. 1392 * 1393 * @see #PRESSED_STATE_SET 1394 * @see #ENABLED_STATE_SET 1395 * @see #FOCUSED_STATE_SET 1396 * @see #WINDOW_FOCUSED_STATE_SET 1397 */ 1398 protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1399 /** 1400 * Indicates the view is pressed, enabled, focused and selected. 1401 * 1402 * @see #PRESSED_STATE_SET 1403 * @see #ENABLED_STATE_SET 1404 * @see #SELECTED_STATE_SET 1405 * @see #FOCUSED_STATE_SET 1406 */ 1407 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; 1408 /** 1409 * Indicates the view is pressed, enabled, focused, selected and its window 1410 * has the focus. 1411 * 1412 * @see #PRESSED_STATE_SET 1413 * @see #ENABLED_STATE_SET 1414 * @see #SELECTED_STATE_SET 1415 * @see #FOCUSED_STATE_SET 1416 * @see #WINDOW_FOCUSED_STATE_SET 1417 */ 1418 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1419 1420 /** 1421 * The order here is very important to {@link #getDrawableState()} 1422 */ 1423 private static final int[][] VIEW_STATE_SETS; 1424 1425 static final int VIEW_STATE_WINDOW_FOCUSED = 1; 1426 static final int VIEW_STATE_SELECTED = 1 << 1; 1427 static final int VIEW_STATE_FOCUSED = 1 << 2; 1428 static final int VIEW_STATE_ENABLED = 1 << 3; 1429 static final int VIEW_STATE_PRESSED = 1 << 4; 1430 static final int VIEW_STATE_ACTIVATED = 1 << 5; 1431 static final int VIEW_STATE_ACCELERATED = 1 << 6; 1432 static final int VIEW_STATE_HOVERED = 1 << 7; 1433 static final int VIEW_STATE_DRAG_CAN_ACCEPT = 1 << 8; 1434 static final int VIEW_STATE_DRAG_HOVERED = 1 << 9; 1435 1436 static final int[] VIEW_STATE_IDS = new int[] { 1437 R.attr.state_window_focused, VIEW_STATE_WINDOW_FOCUSED, 1438 R.attr.state_selected, VIEW_STATE_SELECTED, 1439 R.attr.state_focused, VIEW_STATE_FOCUSED, 1440 R.attr.state_enabled, VIEW_STATE_ENABLED, 1441 R.attr.state_pressed, VIEW_STATE_PRESSED, 1442 R.attr.state_activated, VIEW_STATE_ACTIVATED, 1443 R.attr.state_accelerated, VIEW_STATE_ACCELERATED, 1444 R.attr.state_hovered, VIEW_STATE_HOVERED, 1445 R.attr.state_drag_can_accept, VIEW_STATE_DRAG_CAN_ACCEPT, 1446 R.attr.state_drag_hovered, VIEW_STATE_DRAG_HOVERED 1447 }; 1448 1449 static { 1450 if ((VIEW_STATE_IDS.length/2) != R.styleable.ViewDrawableStates.length) { 1451 throw new IllegalStateException( 1452 "VIEW_STATE_IDs array length does not match ViewDrawableStates style array"); 1453 } 1454 int[] orderedIds = new int[VIEW_STATE_IDS.length]; 1455 for (int i = 0; i < R.styleable.ViewDrawableStates.length; i++) { 1456 int viewState = R.styleable.ViewDrawableStates[i]; 1457 for (int j = 0; j<VIEW_STATE_IDS.length; j += 2) { 1458 if (VIEW_STATE_IDS[j] == viewState) { 1459 orderedIds[i * 2] = viewState; 1460 orderedIds[i * 2 + 1] = VIEW_STATE_IDS[j + 1]; 1461 } 1462 } 1463 } 1464 final int NUM_BITS = VIEW_STATE_IDS.length / 2; 1465 VIEW_STATE_SETS = new int[1 << NUM_BITS][]; 1466 for (int i = 0; i < VIEW_STATE_SETS.length; i++) { 1467 int numBits = Integer.bitCount(i); 1468 int[] set = new int[numBits]; 1469 int pos = 0; 1470 for (int j = 0; j < orderedIds.length; j += 2) { 1471 if ((i & orderedIds[j+1]) != 0) { 1472 set[pos++] = orderedIds[j]; 1473 } 1474 } 1475 VIEW_STATE_SETS[i] = set; 1476 } 1477 1478 EMPTY_STATE_SET = VIEW_STATE_SETS[0]; 1479 WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_WINDOW_FOCUSED]; 1480 SELECTED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_SELECTED]; 1481 SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1482 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED]; 1483 FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_FOCUSED]; 1484 FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1485 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED]; 1486 FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1487 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED]; 1488 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1489 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1490 | VIEW_STATE_FOCUSED]; 1491 ENABLED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_ENABLED]; 1492 ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1493 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED]; 1494 ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1495 VIEW_STATE_SELECTED | VIEW_STATE_ENABLED]; 1496 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1497 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1498 | VIEW_STATE_ENABLED]; 1499 ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1500 VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED]; 1501 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1502 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1503 | VIEW_STATE_ENABLED]; 1504 ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1505 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1506 | VIEW_STATE_ENABLED]; 1507 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1508 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1509 | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED]; 1510 1511 PRESSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_PRESSED]; 1512 PRESSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1513 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_PRESSED]; 1514 PRESSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1515 VIEW_STATE_SELECTED | VIEW_STATE_PRESSED]; 1516 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1517 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1518 | VIEW_STATE_PRESSED]; 1519 PRESSED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1520 VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; 1521 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1522 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1523 | VIEW_STATE_PRESSED]; 1524 PRESSED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1525 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1526 | VIEW_STATE_PRESSED]; 1527 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1528 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1529 | VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; 1530 PRESSED_ENABLED_STATE_SET = VIEW_STATE_SETS[ 1531 VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1532 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1533 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED 1534 | VIEW_STATE_PRESSED]; 1535 PRESSED_ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1536 VIEW_STATE_SELECTED | VIEW_STATE_ENABLED 1537 | VIEW_STATE_PRESSED]; 1538 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1539 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1540 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1541 PRESSED_ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1542 VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED 1543 | VIEW_STATE_PRESSED]; 1544 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1545 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1546 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1547 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1548 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1549 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1550 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1551 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1552 | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED 1553 | VIEW_STATE_PRESSED]; 1554 } 1555 1556 /** 1557 * Accessibility event types that are dispatched for text population. 1558 */ 1559 private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = 1560 AccessibilityEvent.TYPE_VIEW_CLICKED 1561 | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED 1562 | AccessibilityEvent.TYPE_VIEW_SELECTED 1563 | AccessibilityEvent.TYPE_VIEW_FOCUSED 1564 | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED 1565 | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER 1566 | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT 1567 | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED 1568 | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED 1569 | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED 1570 | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; 1571 1572 /** 1573 * Temporary Rect currently for use in setBackground(). This will probably 1574 * be extended in the future to hold our own class with more than just 1575 * a Rect. :) 1576 */ 1577 static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); 1578 1579 /** 1580 * Map used to store views' tags. 1581 */ 1582 private SparseArray<Object> mKeyedTags; 1583 1584 /** 1585 * The next available accessibility id. 1586 */ 1587 private static int sNextAccessibilityViewId; 1588 1589 /** 1590 * The animation currently associated with this view. 1591 * @hide 1592 */ 1593 protected Animation mCurrentAnimation = null; 1594 1595 /** 1596 * Width as measured during measure pass. 1597 * {@hide} 1598 */ 1599 @ViewDebug.ExportedProperty(category = "measurement") 1600 int mMeasuredWidth; 1601 1602 /** 1603 * Height as measured during measure pass. 1604 * {@hide} 1605 */ 1606 @ViewDebug.ExportedProperty(category = "measurement") 1607 int mMeasuredHeight; 1608 1609 /** 1610 * Flag to indicate that this view was marked INVALIDATED, or had its display list 1611 * invalidated, prior to the current drawing iteration. If true, the view must re-draw 1612 * its display list. This flag, used only when hw accelerated, allows us to clear the 1613 * flag while retaining this information until it's needed (at getDisplayList() time and 1614 * in drawChild(), when we decide to draw a view's children's display lists into our own). 1615 * 1616 * {@hide} 1617 */ 1618 boolean mRecreateDisplayList = false; 1619 1620 /** 1621 * The view's identifier. 1622 * {@hide} 1623 * 1624 * @see #setId(int) 1625 * @see #getId() 1626 */ 1627 @ViewDebug.ExportedProperty(resolveId = true) 1628 int mID = NO_ID; 1629 1630 /** 1631 * The stable ID of this view for accessibility purposes. 1632 */ 1633 int mAccessibilityViewId = NO_ID; 1634 1635 private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 1636 1637 SendViewStateChangedAccessibilityEvent mSendViewStateChangedAccessibilityEvent; 1638 1639 /** 1640 * The view's tag. 1641 * {@hide} 1642 * 1643 * @see #setTag(Object) 1644 * @see #getTag() 1645 */ 1646 protected Object mTag; 1647 1648 // for mPrivateFlags: 1649 /** {@hide} */ 1650 static final int PFLAG_WANTS_FOCUS = 0x00000001; 1651 /** {@hide} */ 1652 static final int PFLAG_FOCUSED = 0x00000002; 1653 /** {@hide} */ 1654 static final int PFLAG_SELECTED = 0x00000004; 1655 /** {@hide} */ 1656 static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; 1657 /** {@hide} */ 1658 static final int PFLAG_HAS_BOUNDS = 0x00000010; 1659 /** {@hide} */ 1660 static final int PFLAG_DRAWN = 0x00000020; 1661 /** 1662 * When this flag is set, this view is running an animation on behalf of its 1663 * children and should therefore not cancel invalidate requests, even if they 1664 * lie outside of this view's bounds. 1665 * 1666 * {@hide} 1667 */ 1668 static final int PFLAG_DRAW_ANIMATION = 0x00000040; 1669 /** {@hide} */ 1670 static final int PFLAG_SKIP_DRAW = 0x00000080; 1671 /** {@hide} */ 1672 static final int PFLAG_ONLY_DRAWS_BACKGROUND = 0x00000100; 1673 /** {@hide} */ 1674 static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; 1675 /** {@hide} */ 1676 static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; 1677 /** {@hide} */ 1678 static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; 1679 /** {@hide} */ 1680 static final int PFLAG_FORCE_LAYOUT = 0x00001000; 1681 /** {@hide} */ 1682 static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; 1683 1684 private static final int PFLAG_PRESSED = 0x00004000; 1685 1686 /** {@hide} */ 1687 static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; 1688 /** 1689 * Flag used to indicate that this view should be drawn once more (and only once 1690 * more) after its animation has completed. 1691 * {@hide} 1692 */ 1693 static final int PFLAG_ANIMATION_STARTED = 0x00010000; 1694 1695 private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; 1696 1697 /** 1698 * Indicates that the View returned true when onSetAlpha() was called and that 1699 * the alpha must be restored. 1700 * {@hide} 1701 */ 1702 static final int PFLAG_ALPHA_SET = 0x00040000; 1703 1704 /** 1705 * Set by {@link #setScrollContainer(boolean)}. 1706 */ 1707 static final int PFLAG_SCROLL_CONTAINER = 0x00080000; 1708 1709 /** 1710 * Set by {@link #setScrollContainer(boolean)}. 1711 */ 1712 static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; 1713 1714 /** 1715 * View flag indicating whether this view was invalidated (fully or partially.) 1716 * 1717 * @hide 1718 */ 1719 static final int PFLAG_DIRTY = 0x00200000; 1720 1721 /** 1722 * View flag indicating whether this view was invalidated by an opaque 1723 * invalidate request. 1724 * 1725 * @hide 1726 */ 1727 static final int PFLAG_DIRTY_OPAQUE = 0x00400000; 1728 1729 /** 1730 * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. 1731 * 1732 * @hide 1733 */ 1734 static final int PFLAG_DIRTY_MASK = 0x00600000; 1735 1736 /** 1737 * Indicates whether the background is opaque. 1738 * 1739 * @hide 1740 */ 1741 static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; 1742 1743 /** 1744 * Indicates whether the scrollbars are opaque. 1745 * 1746 * @hide 1747 */ 1748 static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; 1749 1750 /** 1751 * Indicates whether the view is opaque. 1752 * 1753 * @hide 1754 */ 1755 static final int PFLAG_OPAQUE_MASK = 0x01800000; 1756 1757 /** 1758 * Indicates a prepressed state; 1759 * the short time between ACTION_DOWN and recognizing 1760 * a 'real' press. Prepressed is used to recognize quick taps 1761 * even when they are shorter than ViewConfiguration.getTapTimeout(). 1762 * 1763 * @hide 1764 */ 1765 private static final int PFLAG_PREPRESSED = 0x02000000; 1766 1767 /** 1768 * Indicates whether the view is temporarily detached. 1769 * 1770 * @hide 1771 */ 1772 static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; 1773 1774 /** 1775 * Indicates that we should awaken scroll bars once attached 1776 * 1777 * @hide 1778 */ 1779 private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; 1780 1781 /** 1782 * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. 1783 * @hide 1784 */ 1785 private static final int PFLAG_HOVERED = 0x10000000; 1786 1787 /** 1788 * Indicates that pivotX or pivotY were explicitly set and we should not assume the center 1789 * for transform operations 1790 * 1791 * @hide 1792 */ 1793 private static final int PFLAG_PIVOT_EXPLICITLY_SET = 0x20000000; 1794 1795 /** {@hide} */ 1796 static final int PFLAG_ACTIVATED = 0x40000000; 1797 1798 /** 1799 * Indicates that this view was specifically invalidated, not just dirtied because some 1800 * child view was invalidated. The flag is used to determine when we need to recreate 1801 * a view's display list (as opposed to just returning a reference to its existing 1802 * display list). 1803 * 1804 * @hide 1805 */ 1806 static final int PFLAG_INVALIDATED = 0x80000000; 1807 1808 /** 1809 * Masks for mPrivateFlags2, as generated by dumpFlags(): 1810 * 1811 * |-------|-------|-------|-------| 1812 * 1 PFLAG2_DRAG_CAN_ACCEPT 1813 * 1 PFLAG2_DRAG_HOVERED 1814 * 11 PFLAG2_LAYOUT_DIRECTION_MASK 1815 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 1816 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED 1817 * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 1818 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] 1819 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] 1820 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] 1821 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] 1822 * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] 1823 * 111 PFLAG2_TEXT_DIRECTION_MASK 1824 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED 1825 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT 1826 * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK 1827 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] 1828 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] 1829 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] 1830 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] 1831 * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] 1832 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] 1833 * 111 PFLAG2_TEXT_ALIGNMENT_MASK 1834 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED 1835 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT 1836 * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK 1837 * 111 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK 1838 * 11 PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK 1839 * 1 PFLAG2_ACCESSIBILITY_FOCUSED 1840 * 1 PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED 1841 * 1 PFLAG2_VIEW_QUICK_REJECTED 1842 * 1 PFLAG2_PADDING_RESOLVED 1843 * 1 PFLAG2_DRAWABLE_RESOLVED 1844 * 1 PFLAG2_HAS_TRANSIENT_STATE 1845 * |-------|-------|-------|-------| 1846 */ 1847 1848 /** 1849 * Indicates that this view has reported that it can accept the current drag's content. 1850 * Cleared when the drag operation concludes. 1851 * @hide 1852 */ 1853 static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; 1854 1855 /** 1856 * Indicates that this view is currently directly under the drag location in a 1857 * drag-and-drop operation involving content that it can accept. Cleared when 1858 * the drag exits the view, or when the drag operation concludes. 1859 * @hide 1860 */ 1861 static final int PFLAG2_DRAG_HOVERED = 0x00000002; 1862 1863 /** @hide */ 1864 @IntDef({ 1865 LAYOUT_DIRECTION_LTR, 1866 LAYOUT_DIRECTION_RTL, 1867 LAYOUT_DIRECTION_INHERIT, 1868 LAYOUT_DIRECTION_LOCALE 1869 }) 1870 @Retention(RetentionPolicy.SOURCE) 1871 // Not called LayoutDirection to avoid conflict with android.util.LayoutDirection 1872 public @interface LayoutDir {} 1873 1874 /** @hide */ 1875 @IntDef({ 1876 LAYOUT_DIRECTION_LTR, 1877 LAYOUT_DIRECTION_RTL 1878 }) 1879 @Retention(RetentionPolicy.SOURCE) 1880 public @interface ResolvedLayoutDir {} 1881 1882 /** 1883 * Horizontal layout direction of this view is from Left to Right. 1884 * Use with {@link #setLayoutDirection}. 1885 */ 1886 public static final int LAYOUT_DIRECTION_LTR = LayoutDirection.LTR; 1887 1888 /** 1889 * Horizontal layout direction of this view is from Right to Left. 1890 * Use with {@link #setLayoutDirection}. 1891 */ 1892 public static final int LAYOUT_DIRECTION_RTL = LayoutDirection.RTL; 1893 1894 /** 1895 * Horizontal layout direction of this view is inherited from its parent. 1896 * Use with {@link #setLayoutDirection}. 1897 */ 1898 public static final int LAYOUT_DIRECTION_INHERIT = LayoutDirection.INHERIT; 1899 1900 /** 1901 * Horizontal layout direction of this view is from deduced from the default language 1902 * script for the locale. Use with {@link #setLayoutDirection}. 1903 */ 1904 public static final int LAYOUT_DIRECTION_LOCALE = LayoutDirection.LOCALE; 1905 1906 /** 1907 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 1908 * @hide 1909 */ 1910 static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; 1911 1912 /** 1913 * Mask for use with private flags indicating bits used for horizontal layout direction. 1914 * @hide 1915 */ 1916 static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1917 1918 /** 1919 * Indicates whether the view horizontal layout direction has been resolved and drawn to the 1920 * right-to-left direction. 1921 * @hide 1922 */ 1923 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1924 1925 /** 1926 * Indicates whether the view horizontal layout direction has been resolved. 1927 * @hide 1928 */ 1929 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1930 1931 /** 1932 * Mask for use with private flags indicating bits used for resolved horizontal layout direction. 1933 * @hide 1934 */ 1935 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C 1936 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1937 1938 /* 1939 * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct 1940 * flag value. 1941 * @hide 1942 */ 1943 private static final int[] LAYOUT_DIRECTION_FLAGS = { 1944 LAYOUT_DIRECTION_LTR, 1945 LAYOUT_DIRECTION_RTL, 1946 LAYOUT_DIRECTION_INHERIT, 1947 LAYOUT_DIRECTION_LOCALE 1948 }; 1949 1950 /** 1951 * Default horizontal layout direction. 1952 */ 1953 private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; 1954 1955 /** 1956 * Default horizontal layout direction. 1957 * @hide 1958 */ 1959 static final int LAYOUT_DIRECTION_RESOLVED_DEFAULT = LAYOUT_DIRECTION_LTR; 1960 1961 /** 1962 * Text direction is inherited thru {@link ViewGroup} 1963 */ 1964 public static final int TEXT_DIRECTION_INHERIT = 0; 1965 1966 /** 1967 * Text direction is using "first strong algorithm". The first strong directional character 1968 * determines the paragraph direction. If there is no strong directional character, the 1969 * paragraph direction is the view's resolved layout direction. 1970 */ 1971 public static final int TEXT_DIRECTION_FIRST_STRONG = 1; 1972 1973 /** 1974 * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains 1975 * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. 1976 * If there are neither, the paragraph direction is the view's resolved layout direction. 1977 */ 1978 public static final int TEXT_DIRECTION_ANY_RTL = 2; 1979 1980 /** 1981 * Text direction is forced to LTR. 1982 */ 1983 public static final int TEXT_DIRECTION_LTR = 3; 1984 1985 /** 1986 * Text direction is forced to RTL. 1987 */ 1988 public static final int TEXT_DIRECTION_RTL = 4; 1989 1990 /** 1991 * Text direction is coming from the system Locale. 1992 */ 1993 public static final int TEXT_DIRECTION_LOCALE = 5; 1994 1995 /** 1996 * Default text direction is inherited 1997 */ 1998 private static final int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; 1999 2000 /** 2001 * Default resolved text direction 2002 * @hide 2003 */ 2004 static final int TEXT_DIRECTION_RESOLVED_DEFAULT = TEXT_DIRECTION_FIRST_STRONG; 2005 2006 /** 2007 * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) 2008 * @hide 2009 */ 2010 static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; 2011 2012 /** 2013 * Mask for use with private flags indicating bits used for text direction. 2014 * @hide 2015 */ 2016 static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 2017 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2018 2019 /** 2020 * Array of text direction flags for mapping attribute "textDirection" to correct 2021 * flag value. 2022 * @hide 2023 */ 2024 private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { 2025 TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2026 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2027 TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2028 TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2029 TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2030 TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT 2031 }; 2032 2033 /** 2034 * Indicates whether the view text direction has been resolved. 2035 * @hide 2036 */ 2037 static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 2038 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2039 2040 /** 2041 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2042 * @hide 2043 */ 2044 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; 2045 2046 /** 2047 * Mask for use with private flags indicating bits used for resolved text direction. 2048 * @hide 2049 */ 2050 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 2051 << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2052 2053 /** 2054 * Indicates whether the view text direction has been resolved to the "first strong" heuristic. 2055 * @hide 2056 */ 2057 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = 2058 TEXT_DIRECTION_RESOLVED_DEFAULT << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2059 2060 /** @hide */ 2061 @IntDef({ 2062 TEXT_ALIGNMENT_INHERIT, 2063 TEXT_ALIGNMENT_GRAVITY, 2064 TEXT_ALIGNMENT_CENTER, 2065 TEXT_ALIGNMENT_TEXT_START, 2066 TEXT_ALIGNMENT_TEXT_END, 2067 TEXT_ALIGNMENT_VIEW_START, 2068 TEXT_ALIGNMENT_VIEW_END 2069 }) 2070 @Retention(RetentionPolicy.SOURCE) 2071 public @interface TextAlignment {} 2072 2073 /** 2074 * Default text alignment. The text alignment of this View is inherited from its parent. 2075 * Use with {@link #setTextAlignment(int)} 2076 */ 2077 public static final int TEXT_ALIGNMENT_INHERIT = 0; 2078 2079 /** 2080 * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, 2081 * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph’s text direction. 2082 * 2083 * Use with {@link #setTextAlignment(int)} 2084 */ 2085 public static final int TEXT_ALIGNMENT_GRAVITY = 1; 2086 2087 /** 2088 * Align to the start of the paragraph, e.g. ALIGN_NORMAL. 2089 * 2090 * Use with {@link #setTextAlignment(int)} 2091 */ 2092 public static final int TEXT_ALIGNMENT_TEXT_START = 2; 2093 2094 /** 2095 * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. 2096 * 2097 * Use with {@link #setTextAlignment(int)} 2098 */ 2099 public static final int TEXT_ALIGNMENT_TEXT_END = 3; 2100 2101 /** 2102 * Center the paragraph, e.g. ALIGN_CENTER. 2103 * 2104 * Use with {@link #setTextAlignment(int)} 2105 */ 2106 public static final int TEXT_ALIGNMENT_CENTER = 4; 2107 2108 /** 2109 * Align to the start of the view, which is ALIGN_LEFT if the view’s resolved 2110 * layoutDirection is LTR, and ALIGN_RIGHT otherwise. 2111 * 2112 * Use with {@link #setTextAlignment(int)} 2113 */ 2114 public static final int TEXT_ALIGNMENT_VIEW_START = 5; 2115 2116 /** 2117 * Align to the end of the view, which is ALIGN_RIGHT if the view’s resolved 2118 * layoutDirection is LTR, and ALIGN_LEFT otherwise. 2119 * 2120 * Use with {@link #setTextAlignment(int)} 2121 */ 2122 public static final int TEXT_ALIGNMENT_VIEW_END = 6; 2123 2124 /** 2125 * Default text alignment is inherited 2126 */ 2127 private static final int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2128 2129 /** 2130 * Default resolved text alignment 2131 * @hide 2132 */ 2133 static final int TEXT_ALIGNMENT_RESOLVED_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2134 2135 /** 2136 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2137 * @hide 2138 */ 2139 static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; 2140 2141 /** 2142 * Mask for use with private flags indicating bits used for text alignment. 2143 * @hide 2144 */ 2145 static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2146 2147 /** 2148 * Array of text direction flags for mapping attribute "textAlignment" to correct 2149 * flag value. 2150 * @hide 2151 */ 2152 private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { 2153 TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2154 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2155 TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2156 TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2157 TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2158 TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2159 TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 2160 }; 2161 2162 /** 2163 * Indicates whether the view text alignment has been resolved. 2164 * @hide 2165 */ 2166 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2167 2168 /** 2169 * Bit shift to get the resolved text alignment. 2170 * @hide 2171 */ 2172 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; 2173 2174 /** 2175 * Mask for use with private flags indicating bits used for text alignment. 2176 * @hide 2177 */ 2178 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 2179 << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2180 2181 /** 2182 * Indicates whether if the view text alignment has been resolved to gravity 2183 */ 2184 private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = 2185 TEXT_ALIGNMENT_RESOLVED_DEFAULT << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2186 2187 // Accessiblity constants for mPrivateFlags2 2188 2189 /** 2190 * Shift for the bits in {@link #mPrivateFlags2} related to the 2191 * "importantForAccessibility" attribute. 2192 */ 2193 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; 2194 2195 /** 2196 * Automatically determine whether a view is important for accessibility. 2197 */ 2198 public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; 2199 2200 /** 2201 * The view is important for accessibility. 2202 */ 2203 public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; 2204 2205 /** 2206 * The view is not important for accessibility. 2207 */ 2208 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; 2209 2210 /** 2211 * The view is not important for accessibility, nor are any of its 2212 * descendant views. 2213 */ 2214 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 0x00000004; 2215 2216 /** 2217 * The default whether the view is important for accessibility. 2218 */ 2219 static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; 2220 2221 /** 2222 * Mask for obtainig the bits which specify how to determine 2223 * whether a view is important for accessibility. 2224 */ 2225 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO 2226 | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO 2227 | IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) 2228 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2229 2230 /** 2231 * Shift for the bits in {@link #mPrivateFlags2} related to the 2232 * "accessibilityLiveRegion" attribute. 2233 */ 2234 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT = 23; 2235 2236 /** 2237 * Live region mode specifying that accessibility services should not 2238 * automatically announce changes to this view. This is the default live 2239 * region mode for most views. 2240 * <p> 2241 * Use with {@link #setAccessibilityLiveRegion(int)}. 2242 */ 2243 public static final int ACCESSIBILITY_LIVE_REGION_NONE = 0x00000000; 2244 2245 /** 2246 * Live region mode specifying that accessibility services should announce 2247 * changes to this view. 2248 * <p> 2249 * Use with {@link #setAccessibilityLiveRegion(int)}. 2250 */ 2251 public static final int ACCESSIBILITY_LIVE_REGION_POLITE = 0x00000001; 2252 2253 /** 2254 * Live region mode specifying that accessibility services should interrupt 2255 * ongoing speech to immediately announce changes to this view. 2256 * <p> 2257 * Use with {@link #setAccessibilityLiveRegion(int)}. 2258 */ 2259 public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 0x00000002; 2260 2261 /** 2262 * The default whether the view is important for accessibility. 2263 */ 2264 static final int ACCESSIBILITY_LIVE_REGION_DEFAULT = ACCESSIBILITY_LIVE_REGION_NONE; 2265 2266 /** 2267 * Mask for obtaining the bits which specify a view's accessibility live 2268 * region mode. 2269 */ 2270 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK = (ACCESSIBILITY_LIVE_REGION_NONE 2271 | ACCESSIBILITY_LIVE_REGION_POLITE | ACCESSIBILITY_LIVE_REGION_ASSERTIVE) 2272 << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 2273 2274 /** 2275 * Flag indicating whether a view has accessibility focus. 2276 */ 2277 static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x04000000; 2278 2279 /** 2280 * Flag whether the accessibility state of the subtree rooted at this view changed. 2281 */ 2282 static final int PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED = 0x08000000; 2283 2284 /** 2285 * Flag indicating whether a view failed the quickReject() check in draw(). This condition 2286 * is used to check whether later changes to the view's transform should invalidate the 2287 * view to force the quickReject test to run again. 2288 */ 2289 static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; 2290 2291 /** 2292 * Flag indicating that start/end padding has been resolved into left/right padding 2293 * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} 2294 * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved 2295 * during measurement. In some special cases this is required such as when an adapter-based 2296 * view measures prospective children without attaching them to a window. 2297 */ 2298 static final int PFLAG2_PADDING_RESOLVED = 0x20000000; 2299 2300 /** 2301 * Flag indicating that the start/end drawables has been resolved into left/right ones. 2302 */ 2303 static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; 2304 2305 /** 2306 * Indicates that the view is tracking some sort of transient state 2307 * that the app should not need to be aware of, but that the framework 2308 * should take special care to preserve. 2309 */ 2310 static final int PFLAG2_HAS_TRANSIENT_STATE = 0x80000000; 2311 2312 /** 2313 * Group of bits indicating that RTL properties resolution is done. 2314 */ 2315 static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | 2316 PFLAG2_TEXT_DIRECTION_RESOLVED | 2317 PFLAG2_TEXT_ALIGNMENT_RESOLVED | 2318 PFLAG2_PADDING_RESOLVED | 2319 PFLAG2_DRAWABLE_RESOLVED; 2320 2321 // There are a couple of flags left in mPrivateFlags2 2322 2323 /* End of masks for mPrivateFlags2 */ 2324 2325 /* Masks for mPrivateFlags3 */ 2326 2327 /** 2328 * Flag indicating that view has a transform animation set on it. This is used to track whether 2329 * an animation is cleared between successive frames, in order to tell the associated 2330 * DisplayList to clear its animation matrix. 2331 */ 2332 static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; 2333 2334 /** 2335 * Flag indicating that view has an alpha animation set on it. This is used to track whether an 2336 * animation is cleared between successive frames, in order to tell the associated 2337 * DisplayList to restore its alpha value. 2338 */ 2339 static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; 2340 2341 /** 2342 * Flag indicating that the view has been through at least one layout since it 2343 * was last attached to a window. 2344 */ 2345 static final int PFLAG3_IS_LAID_OUT = 0x4; 2346 2347 /** 2348 * Flag indicating that a call to measure() was skipped and should be done 2349 * instead when layout() is invoked. 2350 */ 2351 static final int PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT = 0x8; 2352 2353 /** 2354 * Flag indicating that an overridden method correctly called down to 2355 * the superclass implementation as required by the API spec. 2356 */ 2357 static final int PFLAG3_CALLED_SUPER = 0x10; 2358 2359 2360 /* End of masks for mPrivateFlags3 */ 2361 2362 static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; 2363 2364 /** 2365 * Always allow a user to over-scroll this view, provided it is a 2366 * view that can scroll. 2367 * 2368 * @see #getOverScrollMode() 2369 * @see #setOverScrollMode(int) 2370 */ 2371 public static final int OVER_SCROLL_ALWAYS = 0; 2372 2373 /** 2374 * Allow a user to over-scroll this view only if the content is large 2375 * enough to meaningfully scroll, provided it is a view that can scroll. 2376 * 2377 * @see #getOverScrollMode() 2378 * @see #setOverScrollMode(int) 2379 */ 2380 public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; 2381 2382 /** 2383 * Never allow a user to over-scroll this view. 2384 * 2385 * @see #getOverScrollMode() 2386 * @see #setOverScrollMode(int) 2387 */ 2388 public static final int OVER_SCROLL_NEVER = 2; 2389 2390 /** 2391 * Special constant for {@link #setSystemUiVisibility(int)}: View has 2392 * requested the system UI (status bar) to be visible (the default). 2393 * 2394 * @see #setSystemUiVisibility(int) 2395 */ 2396 public static final int SYSTEM_UI_FLAG_VISIBLE = 0; 2397 2398 /** 2399 * Flag for {@link #setSystemUiVisibility(int)}: View has requested the 2400 * system UI to enter an unobtrusive "low profile" mode. 2401 * 2402 * <p>This is for use in games, book readers, video players, or any other 2403 * "immersive" application where the usual system chrome is deemed too distracting. 2404 * 2405 * <p>In low profile mode, the status bar and/or navigation icons may dim. 2406 * 2407 * @see #setSystemUiVisibility(int) 2408 */ 2409 public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; 2410 2411 /** 2412 * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the 2413 * system navigation be temporarily hidden. 2414 * 2415 * <p>This is an even less obtrusive state than that called for by 2416 * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls 2417 * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause 2418 * those to disappear. This is useful (in conjunction with the 2419 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and 2420 * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} 2421 * window flags) for displaying content using every last pixel on the display. 2422 * 2423 * <p>There is a limitation: because navigation controls are so important, the least user 2424 * interaction will cause them to reappear immediately. When this happens, both 2425 * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, 2426 * so that both elements reappear at the same time. 2427 * 2428 * @see #setSystemUiVisibility(int) 2429 */ 2430 public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; 2431 2432 /** 2433 * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go 2434 * into the normal fullscreen mode so that its content can take over the screen 2435 * while still allowing the user to interact with the application. 2436 * 2437 * <p>This has the same visual effect as 2438 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN 2439 * WindowManager.LayoutParams.FLAG_FULLSCREEN}, 2440 * meaning that non-critical screen decorations (such as the status bar) will be 2441 * hidden while the user is in the View's window, focusing the experience on 2442 * that content. Unlike the window flag, if you are using ActionBar in 2443 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2444 * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also 2445 * hide the action bar. 2446 * 2447 * <p>This approach to going fullscreen is best used over the window flag when 2448 * it is a transient state -- that is, the application does this at certain 2449 * points in its user interaction where it wants to allow the user to focus 2450 * on content, but not as a continuous state. For situations where the application 2451 * would like to simply stay full screen the entire time (such as a game that 2452 * wants to take over the screen), the 2453 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} 2454 * is usually a better approach. The state set here will be removed by the system 2455 * in various situations (such as the user moving to another application) like 2456 * the other system UI states. 2457 * 2458 * <p>When using this flag, the application should provide some easy facility 2459 * for the user to go out of it. A common example would be in an e-book 2460 * reader, where tapping on the screen brings back whatever screen and UI 2461 * decorations that had been hidden while the user was immersed in reading 2462 * the book. 2463 * 2464 * @see #setSystemUiVisibility(int) 2465 */ 2466 public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; 2467 2468 /** 2469 * Flag for {@link #setSystemUiVisibility(int)}: When using other layout 2470 * flags, we would like a stable view of the content insets given to 2471 * {@link #fitSystemWindows(Rect)}. This means that the insets seen there 2472 * will always represent the worst case that the application can expect 2473 * as a continuous state. In the stock Android UI this is the space for 2474 * the system bar, nav bar, and status bar, but not more transient elements 2475 * such as an input method. 2476 * 2477 * The stable layout your UI sees is based on the system UI modes you can 2478 * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 2479 * then you will get a stable layout for changes of the 2480 * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify 2481 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and 2482 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition 2483 * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} 2484 * with a stable layout. (Note that you should avoid using 2485 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) 2486 * 2487 * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} 2488 * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), 2489 * then a hidden status bar will be considered a "stable" state for purposes 2490 * here. This allows your UI to continually hide the status bar, while still 2491 * using the system UI flags to hide the action bar while still retaining 2492 * a stable layout. Note that changing the window fullscreen flag will never 2493 * provide a stable layout for a clean transition. 2494 * 2495 * <p>If you are using ActionBar in 2496 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2497 * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the 2498 * insets it adds to those given to the application. 2499 */ 2500 public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; 2501 2502 /** 2503 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2504 * to be layed out as if it has requested 2505 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This 2506 * allows it to avoid artifacts when switching in and out of that mode, at 2507 * the expense that some of its user interface may be covered by screen 2508 * decorations when they are shown. You can perform layout of your inner 2509 * UI elements to account for the navigation system UI through the 2510 * {@link #fitSystemWindows(Rect)} method. 2511 */ 2512 public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; 2513 2514 /** 2515 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2516 * to be layed out as if it has requested 2517 * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This 2518 * allows it to avoid artifacts when switching in and out of that mode, at 2519 * the expense that some of its user interface may be covered by screen 2520 * decorations when they are shown. You can perform layout of your inner 2521 * UI elements to account for non-fullscreen system UI through the 2522 * {@link #fitSystemWindows(Rect)} method. 2523 */ 2524 public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; 2525 2526 /** 2527 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2528 * hiding the navigation bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. If this flag is 2529 * not set, {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any 2530 * user interaction. 2531 * <p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only 2532 * has an effect when used in combination with that flag.</p> 2533 */ 2534 public static final int SYSTEM_UI_FLAG_IMMERSIVE = 0x00000800; 2535 2536 /** 2537 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2538 * hiding the status bar with {@link #SYSTEM_UI_FLAG_FULLSCREEN} and/or hiding the navigation 2539 * bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. Use this flag to create an immersive 2540 * experience while also hiding the system bars. If this flag is not set, 2541 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any user 2542 * interaction, and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be force-cleared by the system 2543 * if the user swipes from the top of the screen. 2544 * <p>When system bars are hidden in immersive mode, they can be revealed temporarily with 2545 * system gestures, such as swiping from the top of the screen. These transient system bars 2546 * will overlay app’s content, may have some degree of transparency, and will automatically 2547 * hide after a short timeout. 2548 * </p><p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_FULLSCREEN} and 2549 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only has an effect when used in combination 2550 * with one or both of those flags.</p> 2551 */ 2552 public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000; 2553 2554 /** 2555 * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. 2556 */ 2557 public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; 2558 2559 /** 2560 * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. 2561 */ 2562 public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; 2563 2564 /** 2565 * @hide 2566 * 2567 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2568 * out of the public fields to keep the undefined bits out of the developer's way. 2569 * 2570 * Flag to make the status bar not expandable. Unless you also 2571 * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. 2572 */ 2573 public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; 2574 2575 /** 2576 * @hide 2577 * 2578 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2579 * out of the public fields to keep the undefined bits out of the developer's way. 2580 * 2581 * Flag to hide notification icons and scrolling ticker text. 2582 */ 2583 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; 2584 2585 /** 2586 * @hide 2587 * 2588 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2589 * out of the public fields to keep the undefined bits out of the developer's way. 2590 * 2591 * Flag to disable incoming notification alerts. This will not block 2592 * icons, but it will block sound, vibrating and other visual or aural notifications. 2593 */ 2594 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; 2595 2596 /** 2597 * @hide 2598 * 2599 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2600 * out of the public fields to keep the undefined bits out of the developer's way. 2601 * 2602 * Flag to hide only the scrolling ticker. Note that 2603 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies 2604 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. 2605 */ 2606 public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; 2607 2608 /** 2609 * @hide 2610 * 2611 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2612 * out of the public fields to keep the undefined bits out of the developer's way. 2613 * 2614 * Flag to hide the center system info area. 2615 */ 2616 public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; 2617 2618 /** 2619 * @hide 2620 * 2621 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2622 * out of the public fields to keep the undefined bits out of the developer's way. 2623 * 2624 * Flag to hide only the home button. Don't use this 2625 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2626 */ 2627 public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; 2628 2629 /** 2630 * @hide 2631 * 2632 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2633 * out of the public fields to keep the undefined bits out of the developer's way. 2634 * 2635 * Flag to hide only the back button. Don't use this 2636 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2637 */ 2638 public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; 2639 2640 /** 2641 * @hide 2642 * 2643 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2644 * out of the public fields to keep the undefined bits out of the developer's way. 2645 * 2646 * Flag to hide only the clock. You might use this if your activity has 2647 * its own clock making the status bar's clock redundant. 2648 */ 2649 public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; 2650 2651 /** 2652 * @hide 2653 * 2654 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2655 * out of the public fields to keep the undefined bits out of the developer's way. 2656 * 2657 * Flag to hide only the recent apps button. Don't use this 2658 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2659 */ 2660 public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; 2661 2662 /** 2663 * @hide 2664 * 2665 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2666 * out of the public fields to keep the undefined bits out of the developer's way. 2667 * 2668 * Flag to disable the global search gesture. Don't use this 2669 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2670 */ 2671 public static final int STATUS_BAR_DISABLE_SEARCH = 0x02000000; 2672 2673 /** 2674 * @hide 2675 * 2676 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2677 * out of the public fields to keep the undefined bits out of the developer's way. 2678 * 2679 * Flag to specify that the status bar is displayed in transient mode. 2680 */ 2681 public static final int STATUS_BAR_TRANSIENT = 0x04000000; 2682 2683 /** 2684 * @hide 2685 * 2686 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2687 * out of the public fields to keep the undefined bits out of the developer's way. 2688 * 2689 * Flag to specify that the navigation bar is displayed in transient mode. 2690 */ 2691 public static final int NAVIGATION_BAR_TRANSIENT = 0x08000000; 2692 2693 /** 2694 * @hide 2695 * 2696 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2697 * out of the public fields to keep the undefined bits out of the developer's way. 2698 * 2699 * Flag to specify that the hidden status bar would like to be shown. 2700 */ 2701 public static final int STATUS_BAR_UNHIDE = 0x10000000; 2702 2703 /** 2704 * @hide 2705 * 2706 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2707 * out of the public fields to keep the undefined bits out of the developer's way. 2708 * 2709 * Flag to specify that the hidden navigation bar would like to be shown. 2710 */ 2711 public static final int NAVIGATION_BAR_UNHIDE = 0x20000000; 2712 2713 /** 2714 * @hide 2715 * 2716 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2717 * out of the public fields to keep the undefined bits out of the developer's way. 2718 * 2719 * Flag to specify that the status bar is displayed in translucent mode. 2720 */ 2721 public static final int STATUS_BAR_TRANSLUCENT = 0x40000000; 2722 2723 /** 2724 * @hide 2725 * 2726 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2727 * out of the public fields to keep the undefined bits out of the developer's way. 2728 * 2729 * Flag to specify that the navigation bar is displayed in translucent mode. 2730 */ 2731 public static final int NAVIGATION_BAR_TRANSLUCENT = 0x80000000; 2732 2733 /** 2734 * @hide 2735 */ 2736 public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x0000FFFF; 2737 2738 /** 2739 * These are the system UI flags that can be cleared by events outside 2740 * of an application. Currently this is just the ability to tap on the 2741 * screen while hiding the navigation bar to have it return. 2742 * @hide 2743 */ 2744 public static final int SYSTEM_UI_CLEARABLE_FLAGS = 2745 SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION 2746 | SYSTEM_UI_FLAG_FULLSCREEN; 2747 2748 /** 2749 * Flags that can impact the layout in relation to system UI. 2750 */ 2751 public static final int SYSTEM_UI_LAYOUT_FLAGS = 2752 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 2753 | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 2754 2755 /** @hide */ 2756 @IntDef(flag = true, 2757 value = { FIND_VIEWS_WITH_TEXT, FIND_VIEWS_WITH_CONTENT_DESCRIPTION }) 2758 @Retention(RetentionPolicy.SOURCE) 2759 public @interface FindViewFlags {} 2760 2761 /** 2762 * Find views that render the specified text. 2763 * 2764 * @see #findViewsWithText(ArrayList, CharSequence, int) 2765 */ 2766 public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; 2767 2768 /** 2769 * Find find views that contain the specified content description. 2770 * 2771 * @see #findViewsWithText(ArrayList, CharSequence, int) 2772 */ 2773 public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; 2774 2775 /** 2776 * Find views that contain {@link AccessibilityNodeProvider}. Such 2777 * a View is a root of virtual view hierarchy and may contain the searched 2778 * text. If this flag is set Views with providers are automatically 2779 * added and it is a responsibility of the client to call the APIs of 2780 * the provider to determine whether the virtual tree rooted at this View 2781 * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s 2782 * representing the virtual views with this text. 2783 * 2784 * @see #findViewsWithText(ArrayList, CharSequence, int) 2785 * 2786 * @hide 2787 */ 2788 public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; 2789 2790 /** 2791 * The undefined cursor position. 2792 * 2793 * @hide 2794 */ 2795 public static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; 2796 2797 /** 2798 * Indicates that the screen has changed state and is now off. 2799 * 2800 * @see #onScreenStateChanged(int) 2801 */ 2802 public static final int SCREEN_STATE_OFF = 0x0; 2803 2804 /** 2805 * Indicates that the screen has changed state and is now on. 2806 * 2807 * @see #onScreenStateChanged(int) 2808 */ 2809 public static final int SCREEN_STATE_ON = 0x1; 2810 2811 /** 2812 * Controls the over-scroll mode for this view. 2813 * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, 2814 * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, 2815 * and {@link #OVER_SCROLL_NEVER}. 2816 */ 2817 private int mOverScrollMode; 2818 2819 /** 2820 * The parent this view is attached to. 2821 * {@hide} 2822 * 2823 * @see #getParent() 2824 */ 2825 protected ViewParent mParent; 2826 2827 /** 2828 * {@hide} 2829 */ 2830 AttachInfo mAttachInfo; 2831 2832 /** 2833 * {@hide} 2834 */ 2835 @ViewDebug.ExportedProperty(flagMapping = { 2836 @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, 2837 name = "FORCE_LAYOUT"), 2838 @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, 2839 name = "LAYOUT_REQUIRED"), 2840 @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, 2841 name = "DRAWING_CACHE_INVALID", outputIf = false), 2842 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), 2843 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), 2844 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), 2845 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") 2846 }) 2847 int mPrivateFlags; 2848 int mPrivateFlags2; 2849 int mPrivateFlags3; 2850 2851 /** 2852 * This view's request for the visibility of the status bar. 2853 * @hide 2854 */ 2855 @ViewDebug.ExportedProperty(flagMapping = { 2856 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, 2857 equals = SYSTEM_UI_FLAG_LOW_PROFILE, 2858 name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), 2859 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 2860 equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 2861 name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), 2862 @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, 2863 equals = SYSTEM_UI_FLAG_VISIBLE, 2864 name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) 2865 }) 2866 int mSystemUiVisibility; 2867 2868 /** 2869 * Reference count for transient state. 2870 * @see #setHasTransientState(boolean) 2871 */ 2872 int mTransientStateCount = 0; 2873 2874 /** 2875 * Count of how many windows this view has been attached to. 2876 */ 2877 int mWindowAttachCount; 2878 2879 /** 2880 * The layout parameters associated with this view and used by the parent 2881 * {@link android.view.ViewGroup} to determine how this view should be 2882 * laid out. 2883 * {@hide} 2884 */ 2885 protected ViewGroup.LayoutParams mLayoutParams; 2886 2887 /** 2888 * The view flags hold various views states. 2889 * {@hide} 2890 */ 2891 @ViewDebug.ExportedProperty 2892 int mViewFlags; 2893 2894 static class TransformationInfo { 2895 /** 2896 * The transform matrix for the View. This transform is calculated internally 2897 * based on the rotation, scaleX, and scaleY properties. The identity matrix 2898 * is used by default. Do *not* use this variable directly; instead call 2899 * getMatrix(), which will automatically recalculate the matrix if necessary 2900 * to get the correct matrix based on the latest rotation and scale properties. 2901 */ 2902 private final Matrix mMatrix = new Matrix(); 2903 2904 /** 2905 * The transform matrix for the View. This transform is calculated internally 2906 * based on the rotation, scaleX, and scaleY properties. The identity matrix 2907 * is used by default. Do *not* use this variable directly; instead call 2908 * getInverseMatrix(), which will automatically recalculate the matrix if necessary 2909 * to get the correct matrix based on the latest rotation and scale properties. 2910 */ 2911 private Matrix mInverseMatrix; 2912 2913 /** 2914 * An internal variable that tracks whether we need to recalculate the 2915 * transform matrix, based on whether the rotation or scaleX/Y properties 2916 * have changed since the matrix was last calculated. 2917 */ 2918 boolean mMatrixDirty = false; 2919 2920 /** 2921 * An internal variable that tracks whether we need to recalculate the 2922 * transform matrix, based on whether the rotation or scaleX/Y properties 2923 * have changed since the matrix was last calculated. 2924 */ 2925 private boolean mInverseMatrixDirty = true; 2926 2927 /** 2928 * A variable that tracks whether we need to recalculate the 2929 * transform matrix, based on whether the rotation or scaleX/Y properties 2930 * have changed since the matrix was last calculated. This variable 2931 * is only valid after a call to updateMatrix() or to a function that 2932 * calls it such as getMatrix(), hasIdentityMatrix() and getInverseMatrix(). 2933 */ 2934 private boolean mMatrixIsIdentity = true; 2935 2936 /** 2937 * The Camera object is used to compute a 3D matrix when rotationX or rotationY are set. 2938 */ 2939 private Camera mCamera = null; 2940 2941 /** 2942 * This matrix is used when computing the matrix for 3D rotations. 2943 */ 2944 private Matrix matrix3D = null; 2945 2946 /** 2947 * These prev values are used to recalculate a centered pivot point when necessary. The 2948 * pivot point is only used in matrix operations (when rotation, scale, or translation are 2949 * set), so thes values are only used then as well. 2950 */ 2951 private int mPrevWidth = -1; 2952 private int mPrevHeight = -1; 2953 2954 /** 2955 * The degrees rotation around the vertical axis through the pivot point. 2956 */ 2957 @ViewDebug.ExportedProperty 2958 float mRotationY = 0f; 2959 2960 /** 2961 * The degrees rotation around the horizontal axis through the pivot point. 2962 */ 2963 @ViewDebug.ExportedProperty 2964 float mRotationX = 0f; 2965 2966 /** 2967 * The degrees rotation around the pivot point. 2968 */ 2969 @ViewDebug.ExportedProperty 2970 float mRotation = 0f; 2971 2972 /** 2973 * The amount of translation of the object away from its left property (post-layout). 2974 */ 2975 @ViewDebug.ExportedProperty 2976 float mTranslationX = 0f; 2977 2978 /** 2979 * The amount of translation of the object away from its top property (post-layout). 2980 */ 2981 @ViewDebug.ExportedProperty 2982 float mTranslationY = 0f; 2983 2984 /** 2985 * The amount of scale in the x direction around the pivot point. A 2986 * value of 1 means no scaling is applied. 2987 */ 2988 @ViewDebug.ExportedProperty 2989 float mScaleX = 1f; 2990 2991 /** 2992 * The amount of scale in the y direction around the pivot point. A 2993 * value of 1 means no scaling is applied. 2994 */ 2995 @ViewDebug.ExportedProperty 2996 float mScaleY = 1f; 2997 2998 /** 2999 * The x location of the point around which the view is rotated and scaled. 3000 */ 3001 @ViewDebug.ExportedProperty 3002 float mPivotX = 0f; 3003 3004 /** 3005 * The y location of the point around which the view is rotated and scaled. 3006 */ 3007 @ViewDebug.ExportedProperty 3008 float mPivotY = 0f; 3009 3010 /** 3011 * The opacity of the View. This is a value from 0 to 1, where 0 means 3012 * completely transparent and 1 means completely opaque. 3013 */ 3014 @ViewDebug.ExportedProperty 3015 float mAlpha = 1f; 3016 3017 /** 3018 * The opacity of the view as manipulated by the Fade transition. This is a hidden 3019 * property only used by transitions, which is composited with the other alpha 3020 * values to calculate the final visual alpha value. 3021 */ 3022 float mTransitionAlpha = 1f; 3023 } 3024 3025 TransformationInfo mTransformationInfo; 3026 3027 /** 3028 * Current clip bounds. to which all drawing of this view are constrained. 3029 */ 3030 private Rect mClipBounds = null; 3031 3032 private boolean mLastIsOpaque; 3033 3034 /** 3035 * Convenience value to check for float values that are close enough to zero to be considered 3036 * zero. 3037 */ 3038 private static final float NONZERO_EPSILON = .001f; 3039 3040 /** 3041 * The distance in pixels from the left edge of this view's parent 3042 * to the left edge of this view. 3043 * {@hide} 3044 */ 3045 @ViewDebug.ExportedProperty(category = "layout") 3046 protected int mLeft; 3047 /** 3048 * The distance in pixels from the left edge of this view's parent 3049 * to the right edge of this view. 3050 * {@hide} 3051 */ 3052 @ViewDebug.ExportedProperty(category = "layout") 3053 protected int mRight; 3054 /** 3055 * The distance in pixels from the top edge of this view's parent 3056 * to the top edge of this view. 3057 * {@hide} 3058 */ 3059 @ViewDebug.ExportedProperty(category = "layout") 3060 protected int mTop; 3061 /** 3062 * The distance in pixels from the top edge of this view's parent 3063 * to the bottom edge of this view. 3064 * {@hide} 3065 */ 3066 @ViewDebug.ExportedProperty(category = "layout") 3067 protected int mBottom; 3068 3069 /** 3070 * The offset, in pixels, by which the content of this view is scrolled 3071 * horizontally. 3072 * {@hide} 3073 */ 3074 @ViewDebug.ExportedProperty(category = "scrolling") 3075 protected int mScrollX; 3076 /** 3077 * The offset, in pixels, by which the content of this view is scrolled 3078 * vertically. 3079 * {@hide} 3080 */ 3081 @ViewDebug.ExportedProperty(category = "scrolling") 3082 protected int mScrollY; 3083 3084 /** 3085 * The left padding in pixels, that is the distance in pixels between the 3086 * left edge of this view and the left edge of its content. 3087 * {@hide} 3088 */ 3089 @ViewDebug.ExportedProperty(category = "padding") 3090 protected int mPaddingLeft = 0; 3091 /** 3092 * The right padding in pixels, that is the distance in pixels between the 3093 * right edge of this view and the right edge of its content. 3094 * {@hide} 3095 */ 3096 @ViewDebug.ExportedProperty(category = "padding") 3097 protected int mPaddingRight = 0; 3098 /** 3099 * The top padding in pixels, that is the distance in pixels between the 3100 * top edge of this view and the top edge of its content. 3101 * {@hide} 3102 */ 3103 @ViewDebug.ExportedProperty(category = "padding") 3104 protected int mPaddingTop; 3105 /** 3106 * The bottom padding in pixels, that is the distance in pixels between the 3107 * bottom edge of this view and the bottom edge of its content. 3108 * {@hide} 3109 */ 3110 @ViewDebug.ExportedProperty(category = "padding") 3111 protected int mPaddingBottom; 3112 3113 /** 3114 * The layout insets in pixels, that is the distance in pixels between the 3115 * visible edges of this view its bounds. 3116 */ 3117 private Insets mLayoutInsets; 3118 3119 /** 3120 * Briefly describes the view and is primarily used for accessibility support. 3121 */ 3122 private CharSequence mContentDescription; 3123 3124 /** 3125 * Specifies the id of a view for which this view serves as a label for 3126 * accessibility purposes. 3127 */ 3128 private int mLabelForId = View.NO_ID; 3129 3130 /** 3131 * Predicate for matching labeled view id with its label for 3132 * accessibility purposes. 3133 */ 3134 private MatchLabelForPredicate mMatchLabelForPredicate; 3135 3136 /** 3137 * Predicate for matching a view by its id. 3138 */ 3139 private MatchIdPredicate mMatchIdPredicate; 3140 3141 /** 3142 * Cache the paddingRight set by the user to append to the scrollbar's size. 3143 * 3144 * @hide 3145 */ 3146 @ViewDebug.ExportedProperty(category = "padding") 3147 protected int mUserPaddingRight; 3148 3149 /** 3150 * Cache the paddingBottom set by the user to append to the scrollbar's size. 3151 * 3152 * @hide 3153 */ 3154 @ViewDebug.ExportedProperty(category = "padding") 3155 protected int mUserPaddingBottom; 3156 3157 /** 3158 * Cache the paddingLeft set by the user to append to the scrollbar's size. 3159 * 3160 * @hide 3161 */ 3162 @ViewDebug.ExportedProperty(category = "padding") 3163 protected int mUserPaddingLeft; 3164 3165 /** 3166 * Cache the paddingStart set by the user to append to the scrollbar's size. 3167 * 3168 */ 3169 @ViewDebug.ExportedProperty(category = "padding") 3170 int mUserPaddingStart; 3171 3172 /** 3173 * Cache the paddingEnd set by the user to append to the scrollbar's size. 3174 * 3175 */ 3176 @ViewDebug.ExportedProperty(category = "padding") 3177 int mUserPaddingEnd; 3178 3179 /** 3180 * Cache initial left padding. 3181 * 3182 * @hide 3183 */ 3184 int mUserPaddingLeftInitial; 3185 3186 /** 3187 * Cache initial right padding. 3188 * 3189 * @hide 3190 */ 3191 int mUserPaddingRightInitial; 3192 3193 /** 3194 * Default undefined padding 3195 */ 3196 private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; 3197 3198 /** 3199 * Cache if a left padding has been defined 3200 */ 3201 private boolean mLeftPaddingDefined = false; 3202 3203 /** 3204 * Cache if a right padding has been defined 3205 */ 3206 private boolean mRightPaddingDefined = false; 3207 3208 /** 3209 * @hide 3210 */ 3211 int mOldWidthMeasureSpec = Integer.MIN_VALUE; 3212 /** 3213 * @hide 3214 */ 3215 int mOldHeightMeasureSpec = Integer.MIN_VALUE; 3216 3217 private LongSparseLongArray mMeasureCache; 3218 3219 @ViewDebug.ExportedProperty(deepExport = true, prefix = "bg_") 3220 private Drawable mBackground; 3221 3222 private int mBackgroundResource; 3223 private boolean mBackgroundSizeChanged; 3224 3225 static class ListenerInfo { 3226 /** 3227 * Listener used to dispatch focus change events. 3228 * This field should be made private, so it is hidden from the SDK. 3229 * {@hide} 3230 */ 3231 protected OnFocusChangeListener mOnFocusChangeListener; 3232 3233 /** 3234 * Listeners for layout change events. 3235 */ 3236 private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; 3237 3238 /** 3239 * Listeners for attach events. 3240 */ 3241 private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; 3242 3243 /** 3244 * Listener used to dispatch click events. 3245 * This field should be made private, so it is hidden from the SDK. 3246 * {@hide} 3247 */ 3248 public OnClickListener mOnClickListener; 3249 3250 /** 3251 * Listener used to dispatch long click events. 3252 * This field should be made private, so it is hidden from the SDK. 3253 * {@hide} 3254 */ 3255 protected OnLongClickListener mOnLongClickListener; 3256 3257 /** 3258 * Listener used to build the context menu. 3259 * This field should be made private, so it is hidden from the SDK. 3260 * {@hide} 3261 */ 3262 protected OnCreateContextMenuListener mOnCreateContextMenuListener; 3263 3264 private OnKeyListener mOnKeyListener; 3265 3266 private OnTouchListener mOnTouchListener; 3267 3268 private OnHoverListener mOnHoverListener; 3269 3270 private OnGenericMotionListener mOnGenericMotionListener; 3271 3272 private OnDragListener mOnDragListener; 3273 3274 private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; 3275 } 3276 3277 ListenerInfo mListenerInfo; 3278 3279 /** 3280 * The application environment this view lives in. 3281 * This field should be made private, so it is hidden from the SDK. 3282 * {@hide} 3283 */ 3284 protected Context mContext; 3285 3286 private final Resources mResources; 3287 3288 private ScrollabilityCache mScrollCache; 3289 3290 private int[] mDrawableState = null; 3291 3292 /** 3293 * When this view has focus and the next focus is {@link #FOCUS_LEFT}, 3294 * the user may specify which view to go to next. 3295 */ 3296 private int mNextFocusLeftId = View.NO_ID; 3297 3298 /** 3299 * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, 3300 * the user may specify which view to go to next. 3301 */ 3302 private int mNextFocusRightId = View.NO_ID; 3303 3304 /** 3305 * When this view has focus and the next focus is {@link #FOCUS_UP}, 3306 * the user may specify which view to go to next. 3307 */ 3308 private int mNextFocusUpId = View.NO_ID; 3309 3310 /** 3311 * When this view has focus and the next focus is {@link #FOCUS_DOWN}, 3312 * the user may specify which view to go to next. 3313 */ 3314 private int mNextFocusDownId = View.NO_ID; 3315 3316 /** 3317 * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, 3318 * the user may specify which view to go to next. 3319 */ 3320 int mNextFocusForwardId = View.NO_ID; 3321 3322 private CheckForLongPress mPendingCheckForLongPress; 3323 private CheckForTap mPendingCheckForTap = null; 3324 private PerformClick mPerformClick; 3325 private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; 3326 3327 private UnsetPressedState mUnsetPressedState; 3328 3329 /** 3330 * Whether the long press's action has been invoked. The tap's action is invoked on the 3331 * up event while a long press is invoked as soon as the long press duration is reached, so 3332 * a long press could be performed before the tap is checked, in which case the tap's action 3333 * should not be invoked. 3334 */ 3335 private boolean mHasPerformedLongPress; 3336 3337 /** 3338 * The minimum height of the view. We'll try our best to have the height 3339 * of this view to at least this amount. 3340 */ 3341 @ViewDebug.ExportedProperty(category = "measurement") 3342 private int mMinHeight; 3343 3344 /** 3345 * The minimum width of the view. We'll try our best to have the width 3346 * of this view to at least this amount. 3347 */ 3348 @ViewDebug.ExportedProperty(category = "measurement") 3349 private int mMinWidth; 3350 3351 /** 3352 * The delegate to handle touch events that are physically in this view 3353 * but should be handled by another view. 3354 */ 3355 private TouchDelegate mTouchDelegate = null; 3356 3357 /** 3358 * Solid color to use as a background when creating the drawing cache. Enables 3359 * the cache to use 16 bit bitmaps instead of 32 bit. 3360 */ 3361 private int mDrawingCacheBackgroundColor = 0; 3362 3363 /** 3364 * Special tree observer used when mAttachInfo is null. 3365 */ 3366 private ViewTreeObserver mFloatingTreeObserver; 3367 3368 /** 3369 * Cache the touch slop from the context that created the view. 3370 */ 3371 private int mTouchSlop; 3372 3373 /** 3374 * Object that handles automatic animation of view properties. 3375 */ 3376 private ViewPropertyAnimator mAnimator = null; 3377 3378 /** 3379 * Flag indicating that a drag can cross window boundaries. When 3380 * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called 3381 * with this flag set, all visible applications will be able to participate 3382 * in the drag operation and receive the dragged content. 3383 * 3384 * @hide 3385 */ 3386 public static final int DRAG_FLAG_GLOBAL = 1; 3387 3388 /** 3389 * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. 3390 */ 3391 private float mVerticalScrollFactor; 3392 3393 /** 3394 * Position of the vertical scroll bar. 3395 */ 3396 private int mVerticalScrollbarPosition; 3397 3398 /** 3399 * Position the scroll bar at the default position as determined by the system. 3400 */ 3401 public static final int SCROLLBAR_POSITION_DEFAULT = 0; 3402 3403 /** 3404 * Position the scroll bar along the left edge. 3405 */ 3406 public static final int SCROLLBAR_POSITION_LEFT = 1; 3407 3408 /** 3409 * Position the scroll bar along the right edge. 3410 */ 3411 public static final int SCROLLBAR_POSITION_RIGHT = 2; 3412 3413 /** 3414 * Indicates that the view does not have a layer. 3415 * 3416 * @see #getLayerType() 3417 * @see #setLayerType(int, android.graphics.Paint) 3418 * @see #LAYER_TYPE_SOFTWARE 3419 * @see #LAYER_TYPE_HARDWARE 3420 */ 3421 public static final int LAYER_TYPE_NONE = 0; 3422 3423 /** 3424 * <p>Indicates that the view has a software layer. A software layer is backed 3425 * by a bitmap and causes the view to be rendered using Android's software 3426 * rendering pipeline, even if hardware acceleration is enabled.</p> 3427 * 3428 * <p>Software layers have various usages:</p> 3429 * <p>When the application is not using hardware acceleration, a software layer 3430 * is useful to apply a specific color filter and/or blending mode and/or 3431 * translucency to a view and all its children.</p> 3432 * <p>When the application is using hardware acceleration, a software layer 3433 * is useful to render drawing primitives not supported by the hardware 3434 * accelerated pipeline. It can also be used to cache a complex view tree 3435 * into a texture and reduce the complexity of drawing operations. For instance, 3436 * when animating a complex view tree with a translation, a software layer can 3437 * be used to render the view tree only once.</p> 3438 * <p>Software layers should be avoided when the affected view tree updates 3439 * often. Every update will require to re-render the software layer, which can 3440 * potentially be slow (particularly when hardware acceleration is turned on 3441 * since the layer will have to be uploaded into a hardware texture after every 3442 * update.)</p> 3443 * 3444 * @see #getLayerType() 3445 * @see #setLayerType(int, android.graphics.Paint) 3446 * @see #LAYER_TYPE_NONE 3447 * @see #LAYER_TYPE_HARDWARE 3448 */ 3449 public static final int LAYER_TYPE_SOFTWARE = 1; 3450 3451 /** 3452 * <p>Indicates that the view has a hardware layer. A hardware layer is backed 3453 * by a hardware specific texture (generally Frame Buffer Objects or FBO on 3454 * OpenGL hardware) and causes the view to be rendered using Android's hardware 3455 * rendering pipeline, but only if hardware acceleration is turned on for the 3456 * view hierarchy. When hardware acceleration is turned off, hardware layers 3457 * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> 3458 * 3459 * <p>A hardware layer is useful to apply a specific color filter and/or 3460 * blending mode and/or translucency to a view and all its children.</p> 3461 * <p>A hardware layer can be used to cache a complex view tree into a 3462 * texture and reduce the complexity of drawing operations. For instance, 3463 * when animating a complex view tree with a translation, a hardware layer can 3464 * be used to render the view tree only once.</p> 3465 * <p>A hardware layer can also be used to increase the rendering quality when 3466 * rotation transformations are applied on a view. It can also be used to 3467 * prevent potential clipping issues when applying 3D transforms on a view.</p> 3468 * 3469 * @see #getLayerType() 3470 * @see #setLayerType(int, android.graphics.Paint) 3471 * @see #LAYER_TYPE_NONE 3472 * @see #LAYER_TYPE_SOFTWARE 3473 */ 3474 public static final int LAYER_TYPE_HARDWARE = 2; 3475 3476 @ViewDebug.ExportedProperty(category = "drawing", mapping = { 3477 @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), 3478 @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), 3479 @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") 3480 }) 3481 int mLayerType = LAYER_TYPE_NONE; 3482 Paint mLayerPaint; 3483 Rect mLocalDirtyRect; 3484 private HardwareLayer mHardwareLayer; 3485 3486 /** 3487 * Set to true when drawing cache is enabled and cannot be created. 3488 * 3489 * @hide 3490 */ 3491 public boolean mCachingFailed; 3492 private Bitmap mDrawingCache; 3493 private Bitmap mUnscaledDrawingCache; 3494 3495 DisplayList mDisplayList; 3496 3497 /** 3498 * Set to true when the view is sending hover accessibility events because it 3499 * is the innermost hovered view. 3500 */ 3501 private boolean mSendingHoverAccessibilityEvents; 3502 3503 /** 3504 * Delegate for injecting accessibility functionality. 3505 */ 3506 AccessibilityDelegate mAccessibilityDelegate; 3507 3508 /** 3509 * The view's overlay layer. Developers get a reference to the overlay via getOverlay() 3510 * and add/remove objects to/from the overlay directly through the Overlay methods. 3511 */ 3512 ViewOverlay mOverlay; 3513 3514 /** 3515 * Consistency verifier for debugging purposes. 3516 * @hide 3517 */ 3518 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 3519 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 3520 new InputEventConsistencyVerifier(this, 0) : null; 3521 3522 private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); 3523 3524 /** 3525 * Simple constructor to use when creating a view from code. 3526 * 3527 * @param context The Context the view is running in, through which it can 3528 * access the current theme, resources, etc. 3529 */ 3530 public View(Context context) { 3531 mContext = context; 3532 mResources = context != null ? context.getResources() : null; 3533 mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; 3534 // Set some flags defaults 3535 mPrivateFlags2 = 3536 (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | 3537 (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | 3538 (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | 3539 (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | 3540 (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | 3541 (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); 3542 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 3543 setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); 3544 mUserPaddingStart = UNDEFINED_PADDING; 3545 mUserPaddingEnd = UNDEFINED_PADDING; 3546 3547 if (!sCompatibilityDone && context != null) { 3548 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3549 3550 // Older apps may need this compatibility hack for measurement. 3551 sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1; 3552 3553 // Older apps expect onMeasure() to always be called on a layout pass, regardless 3554 // of whether a layout was requested on that View. 3555 sIgnoreMeasureCache = targetSdkVersion < KITKAT; 3556 3557 sCompatibilityDone = true; 3558 } 3559 } 3560 3561 /** 3562 * Constructor that is called when inflating a view from XML. This is called 3563 * when a view is being constructed from an XML file, supplying attributes 3564 * that were specified in the XML file. This version uses a default style of 3565 * 0, so the only attribute values applied are those in the Context's Theme 3566 * and the given AttributeSet. 3567 * 3568 * <p> 3569 * The method onFinishInflate() will be called after all children have been 3570 * added. 3571 * 3572 * @param context The Context the view is running in, through which it can 3573 * access the current theme, resources, etc. 3574 * @param attrs The attributes of the XML tag that is inflating the view. 3575 * @see #View(Context, AttributeSet, int) 3576 */ 3577 public View(Context context, AttributeSet attrs) { 3578 this(context, attrs, 0); 3579 } 3580 3581 /** 3582 * Perform inflation from XML and apply a class-specific base style from a 3583 * theme attribute. This constructor of View allows subclasses to use their 3584 * own base style when they are inflating. For example, a Button class's 3585 * constructor would call this version of the super class constructor and 3586 * supply <code>R.attr.buttonStyle</code> for <var>defStyleAttr</var>; this 3587 * allows the theme's button style to modify all of the base view attributes 3588 * (in particular its background) as well as the Button class's attributes. 3589 * 3590 * @param context The Context the view is running in, through which it can 3591 * access the current theme, resources, etc. 3592 * @param attrs The attributes of the XML tag that is inflating the view. 3593 * @param defStyleAttr An attribute in the current theme that contains a 3594 * reference to a style resource that supplies default values for 3595 * the view. Can be 0 to not look for defaults. 3596 * @see #View(Context, AttributeSet) 3597 */ 3598 public View(Context context, AttributeSet attrs, int defStyleAttr) { 3599 this(context, attrs, defStyleAttr, 0); 3600 } 3601 3602 /** 3603 * Perform inflation from XML and apply a class-specific base style from a 3604 * theme attribute or style resource. This constructor of View allows 3605 * subclasses to use their own base style when they are inflating. 3606 * <p> 3607 * When determining the final value of a particular attribute, there are 3608 * four inputs that come into play: 3609 * <ol> 3610 * <li>Any attribute values in the given AttributeSet. 3611 * <li>The style resource specified in the AttributeSet (named "style"). 3612 * <li>The default style specified by <var>defStyleAttr</var>. 3613 * <li>The default style specified by <var>defStyleRes</var>. 3614 * <li>The base values in this theme. 3615 * </ol> 3616 * <p> 3617 * Each of these inputs is considered in-order, with the first listed taking 3618 * precedence over the following ones. In other words, if in the 3619 * AttributeSet you have supplied <code><Button * textColor="#ff000000"></code> 3620 * , then the button's text will <em>always</em> be black, regardless of 3621 * what is specified in any of the styles. 3622 * 3623 * @param context The Context the view is running in, through which it can 3624 * access the current theme, resources, etc. 3625 * @param attrs The attributes of the XML tag that is inflating the view. 3626 * @param defStyleAttr An attribute in the current theme that contains a 3627 * reference to a style resource that supplies default values for 3628 * the view. Can be 0 to not look for defaults. 3629 * @param defStyleRes A resource identifier of a style resource that 3630 * supplies default values for the view, used only if 3631 * defStyleAttr is 0 or can not be found in the theme. Can be 0 3632 * to not look for defaults. 3633 * @see #View(Context, AttributeSet, int) 3634 */ 3635 public View(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 3636 this(context); 3637 3638 final TypedArray a = context.obtainStyledAttributes( 3639 attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes); 3640 3641 Drawable background = null; 3642 3643 int leftPadding = -1; 3644 int topPadding = -1; 3645 int rightPadding = -1; 3646 int bottomPadding = -1; 3647 int startPadding = UNDEFINED_PADDING; 3648 int endPadding = UNDEFINED_PADDING; 3649 3650 int padding = -1; 3651 3652 int viewFlagValues = 0; 3653 int viewFlagMasks = 0; 3654 3655 boolean setScrollContainer = false; 3656 3657 int x = 0; 3658 int y = 0; 3659 3660 float tx = 0; 3661 float ty = 0; 3662 float rotation = 0; 3663 float rotationX = 0; 3664 float rotationY = 0; 3665 float sx = 1f; 3666 float sy = 1f; 3667 boolean transformSet = false; 3668 3669 int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; 3670 int overScrollMode = mOverScrollMode; 3671 boolean initializeScrollbars = false; 3672 3673 boolean startPaddingDefined = false; 3674 boolean endPaddingDefined = false; 3675 boolean leftPaddingDefined = false; 3676 boolean rightPaddingDefined = false; 3677 3678 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3679 3680 final int N = a.getIndexCount(); 3681 for (int i = 0; i < N; i++) { 3682 int attr = a.getIndex(i); 3683 switch (attr) { 3684 case com.android.internal.R.styleable.View_background: 3685 background = a.getDrawable(attr); 3686 break; 3687 case com.android.internal.R.styleable.View_padding: 3688 padding = a.getDimensionPixelSize(attr, -1); 3689 mUserPaddingLeftInitial = padding; 3690 mUserPaddingRightInitial = padding; 3691 leftPaddingDefined = true; 3692 rightPaddingDefined = true; 3693 break; 3694 case com.android.internal.R.styleable.View_paddingLeft: 3695 leftPadding = a.getDimensionPixelSize(attr, -1); 3696 mUserPaddingLeftInitial = leftPadding; 3697 leftPaddingDefined = true; 3698 break; 3699 case com.android.internal.R.styleable.View_paddingTop: 3700 topPadding = a.getDimensionPixelSize(attr, -1); 3701 break; 3702 case com.android.internal.R.styleable.View_paddingRight: 3703 rightPadding = a.getDimensionPixelSize(attr, -1); 3704 mUserPaddingRightInitial = rightPadding; 3705 rightPaddingDefined = true; 3706 break; 3707 case com.android.internal.R.styleable.View_paddingBottom: 3708 bottomPadding = a.getDimensionPixelSize(attr, -1); 3709 break; 3710 case com.android.internal.R.styleable.View_paddingStart: 3711 startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3712 startPaddingDefined = (startPadding != UNDEFINED_PADDING); 3713 break; 3714 case com.android.internal.R.styleable.View_paddingEnd: 3715 endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3716 endPaddingDefined = (endPadding != UNDEFINED_PADDING); 3717 break; 3718 case com.android.internal.R.styleable.View_scrollX: 3719 x = a.getDimensionPixelOffset(attr, 0); 3720 break; 3721 case com.android.internal.R.styleable.View_scrollY: 3722 y = a.getDimensionPixelOffset(attr, 0); 3723 break; 3724 case com.android.internal.R.styleable.View_alpha: 3725 setAlpha(a.getFloat(attr, 1f)); 3726 break; 3727 case com.android.internal.R.styleable.View_transformPivotX: 3728 setPivotX(a.getDimensionPixelOffset(attr, 0)); 3729 break; 3730 case com.android.internal.R.styleable.View_transformPivotY: 3731 setPivotY(a.getDimensionPixelOffset(attr, 0)); 3732 break; 3733 case com.android.internal.R.styleable.View_translationX: 3734 tx = a.getDimensionPixelOffset(attr, 0); 3735 transformSet = true; 3736 break; 3737 case com.android.internal.R.styleable.View_translationY: 3738 ty = a.getDimensionPixelOffset(attr, 0); 3739 transformSet = true; 3740 break; 3741 case com.android.internal.R.styleable.View_rotation: 3742 rotation = a.getFloat(attr, 0); 3743 transformSet = true; 3744 break; 3745 case com.android.internal.R.styleable.View_rotationX: 3746 rotationX = a.getFloat(attr, 0); 3747 transformSet = true; 3748 break; 3749 case com.android.internal.R.styleable.View_rotationY: 3750 rotationY = a.getFloat(attr, 0); 3751 transformSet = true; 3752 break; 3753 case com.android.internal.R.styleable.View_scaleX: 3754 sx = a.getFloat(attr, 1f); 3755 transformSet = true; 3756 break; 3757 case com.android.internal.R.styleable.View_scaleY: 3758 sy = a.getFloat(attr, 1f); 3759 transformSet = true; 3760 break; 3761 case com.android.internal.R.styleable.View_id: 3762 mID = a.getResourceId(attr, NO_ID); 3763 break; 3764 case com.android.internal.R.styleable.View_tag: 3765 mTag = a.getText(attr); 3766 break; 3767 case com.android.internal.R.styleable.View_fitsSystemWindows: 3768 if (a.getBoolean(attr, false)) { 3769 viewFlagValues |= FITS_SYSTEM_WINDOWS; 3770 viewFlagMasks |= FITS_SYSTEM_WINDOWS; 3771 } 3772 break; 3773 case com.android.internal.R.styleable.View_focusable: 3774 if (a.getBoolean(attr, false)) { 3775 viewFlagValues |= FOCUSABLE; 3776 viewFlagMasks |= FOCUSABLE_MASK; 3777 } 3778 break; 3779 case com.android.internal.R.styleable.View_focusableInTouchMode: 3780 if (a.getBoolean(attr, false)) { 3781 viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; 3782 viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; 3783 } 3784 break; 3785 case com.android.internal.R.styleable.View_clickable: 3786 if (a.getBoolean(attr, false)) { 3787 viewFlagValues |= CLICKABLE; 3788 viewFlagMasks |= CLICKABLE; 3789 } 3790 break; 3791 case com.android.internal.R.styleable.View_longClickable: 3792 if (a.getBoolean(attr, false)) { 3793 viewFlagValues |= LONG_CLICKABLE; 3794 viewFlagMasks |= LONG_CLICKABLE; 3795 } 3796 break; 3797 case com.android.internal.R.styleable.View_saveEnabled: 3798 if (!a.getBoolean(attr, true)) { 3799 viewFlagValues |= SAVE_DISABLED; 3800 viewFlagMasks |= SAVE_DISABLED_MASK; 3801 } 3802 break; 3803 case com.android.internal.R.styleable.View_duplicateParentState: 3804 if (a.getBoolean(attr, false)) { 3805 viewFlagValues |= DUPLICATE_PARENT_STATE; 3806 viewFlagMasks |= DUPLICATE_PARENT_STATE; 3807 } 3808 break; 3809 case com.android.internal.R.styleable.View_visibility: 3810 final int visibility = a.getInt(attr, 0); 3811 if (visibility != 0) { 3812 viewFlagValues |= VISIBILITY_FLAGS[visibility]; 3813 viewFlagMasks |= VISIBILITY_MASK; 3814 } 3815 break; 3816 case com.android.internal.R.styleable.View_layoutDirection: 3817 // Clear any layout direction flags (included resolved bits) already set 3818 mPrivateFlags2 &= 3819 ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); 3820 // Set the layout direction flags depending on the value of the attribute 3821 final int layoutDirection = a.getInt(attr, -1); 3822 final int value = (layoutDirection != -1) ? 3823 LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; 3824 mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); 3825 break; 3826 case com.android.internal.R.styleable.View_drawingCacheQuality: 3827 final int cacheQuality = a.getInt(attr, 0); 3828 if (cacheQuality != 0) { 3829 viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; 3830 viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; 3831 } 3832 break; 3833 case com.android.internal.R.styleable.View_contentDescription: 3834 setContentDescription(a.getString(attr)); 3835 break; 3836 case com.android.internal.R.styleable.View_labelFor: 3837 setLabelFor(a.getResourceId(attr, NO_ID)); 3838 break; 3839 case com.android.internal.R.styleable.View_soundEffectsEnabled: 3840 if (!a.getBoolean(attr, true)) { 3841 viewFlagValues &= ~SOUND_EFFECTS_ENABLED; 3842 viewFlagMasks |= SOUND_EFFECTS_ENABLED; 3843 } 3844 break; 3845 case com.android.internal.R.styleable.View_hapticFeedbackEnabled: 3846 if (!a.getBoolean(attr, true)) { 3847 viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; 3848 viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; 3849 } 3850 break; 3851 case R.styleable.View_scrollbars: 3852 final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); 3853 if (scrollbars != SCROLLBARS_NONE) { 3854 viewFlagValues |= scrollbars; 3855 viewFlagMasks |= SCROLLBARS_MASK; 3856 initializeScrollbars = true; 3857 } 3858 break; 3859 //noinspection deprecation 3860 case R.styleable.View_fadingEdge: 3861 if (targetSdkVersion >= ICE_CREAM_SANDWICH) { 3862 // Ignore the attribute starting with ICS 3863 break; 3864 } 3865 // With builds < ICS, fall through and apply fading edges 3866 case R.styleable.View_requiresFadingEdge: 3867 final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); 3868 if (fadingEdge != FADING_EDGE_NONE) { 3869 viewFlagValues |= fadingEdge; 3870 viewFlagMasks |= FADING_EDGE_MASK; 3871 initializeFadingEdge(a); 3872 } 3873 break; 3874 case R.styleable.View_scrollbarStyle: 3875 scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); 3876 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 3877 viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; 3878 viewFlagMasks |= SCROLLBARS_STYLE_MASK; 3879 } 3880 break; 3881 case R.styleable.View_isScrollContainer: 3882 setScrollContainer = true; 3883 if (a.getBoolean(attr, false)) { 3884 setScrollContainer(true); 3885 } 3886 break; 3887 case com.android.internal.R.styleable.View_keepScreenOn: 3888 if (a.getBoolean(attr, false)) { 3889 viewFlagValues |= KEEP_SCREEN_ON; 3890 viewFlagMasks |= KEEP_SCREEN_ON; 3891 } 3892 break; 3893 case R.styleable.View_filterTouchesWhenObscured: 3894 if (a.getBoolean(attr, false)) { 3895 viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; 3896 viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; 3897 } 3898 break; 3899 case R.styleable.View_nextFocusLeft: 3900 mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); 3901 break; 3902 case R.styleable.View_nextFocusRight: 3903 mNextFocusRightId = a.getResourceId(attr, View.NO_ID); 3904 break; 3905 case R.styleable.View_nextFocusUp: 3906 mNextFocusUpId = a.getResourceId(attr, View.NO_ID); 3907 break; 3908 case R.styleable.View_nextFocusDown: 3909 mNextFocusDownId = a.getResourceId(attr, View.NO_ID); 3910 break; 3911 case R.styleable.View_nextFocusForward: 3912 mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); 3913 break; 3914 case R.styleable.View_minWidth: 3915 mMinWidth = a.getDimensionPixelSize(attr, 0); 3916 break; 3917 case R.styleable.View_minHeight: 3918 mMinHeight = a.getDimensionPixelSize(attr, 0); 3919 break; 3920 case R.styleable.View_onClick: 3921 if (context.isRestricted()) { 3922 throw new IllegalStateException("The android:onClick attribute cannot " 3923 + "be used within a restricted context"); 3924 } 3925 3926 final String handlerName = a.getString(attr); 3927 if (handlerName != null) { 3928 setOnClickListener(new OnClickListener() { 3929 private Method mHandler; 3930 3931 public void onClick(View v) { 3932 if (mHandler == null) { 3933 try { 3934 mHandler = getContext().getClass().getMethod(handlerName, 3935 View.class); 3936 } catch (NoSuchMethodException e) { 3937 int id = getId(); 3938 String idText = id == NO_ID ? "" : " with id '" 3939 + getContext().getResources().getResourceEntryName( 3940 id) + "'"; 3941 throw new IllegalStateException("Could not find a method " + 3942 handlerName + "(View) in the activity " 3943 + getContext().getClass() + " for onClick handler" 3944 + " on view " + View.this.getClass() + idText, e); 3945 } 3946 } 3947 3948 try { 3949 mHandler.invoke(getContext(), View.this); 3950 } catch (IllegalAccessException e) { 3951 throw new IllegalStateException("Could not execute non " 3952 + "public method of the activity", e); 3953 } catch (InvocationTargetException e) { 3954 throw new IllegalStateException("Could not execute " 3955 + "method of the activity", e); 3956 } 3957 } 3958 }); 3959 } 3960 break; 3961 case R.styleable.View_overScrollMode: 3962 overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); 3963 break; 3964 case R.styleable.View_verticalScrollbarPosition: 3965 mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); 3966 break; 3967 case R.styleable.View_layerType: 3968 setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); 3969 break; 3970 case R.styleable.View_textDirection: 3971 // Clear any text direction flag already set 3972 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 3973 // Set the text direction flags depending on the value of the attribute 3974 final int textDirection = a.getInt(attr, -1); 3975 if (textDirection != -1) { 3976 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; 3977 } 3978 break; 3979 case R.styleable.View_textAlignment: 3980 // Clear any text alignment flag already set 3981 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 3982 // Set the text alignment flag depending on the value of the attribute 3983 final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); 3984 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; 3985 break; 3986 case R.styleable.View_importantForAccessibility: 3987 setImportantForAccessibility(a.getInt(attr, 3988 IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); 3989 break; 3990 case R.styleable.View_accessibilityLiveRegion: 3991 setAccessibilityLiveRegion(a.getInt(attr, ACCESSIBILITY_LIVE_REGION_DEFAULT)); 3992 break; 3993 } 3994 } 3995 3996 setOverScrollMode(overScrollMode); 3997 3998 // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet 3999 // the resolved layout direction). Those cached values will be used later during padding 4000 // resolution. 4001 mUserPaddingStart = startPadding; 4002 mUserPaddingEnd = endPadding; 4003 4004 if (background != null) { 4005 setBackground(background); 4006 } 4007 4008 // setBackground above will record that padding is currently provided by the background. 4009 // If we have padding specified via xml, record that here instead and use it. 4010 mLeftPaddingDefined = leftPaddingDefined; 4011 mRightPaddingDefined = rightPaddingDefined; 4012 4013 if (padding >= 0) { 4014 leftPadding = padding; 4015 topPadding = padding; 4016 rightPadding = padding; 4017 bottomPadding = padding; 4018 mUserPaddingLeftInitial = padding; 4019 mUserPaddingRightInitial = padding; 4020 } 4021 4022 if (isRtlCompatibilityMode()) { 4023 // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. 4024 // left / right padding are used if defined (meaning here nothing to do). If they are not 4025 // defined and start / end padding are defined (e.g. in Frameworks resources), then we use 4026 // start / end and resolve them as left / right (layout direction is not taken into account). 4027 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4028 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4029 // defined. 4030 if (!mLeftPaddingDefined && startPaddingDefined) { 4031 leftPadding = startPadding; 4032 } 4033 mUserPaddingLeftInitial = (leftPadding >= 0) ? leftPadding : mUserPaddingLeftInitial; 4034 if (!mRightPaddingDefined && endPaddingDefined) { 4035 rightPadding = endPadding; 4036 } 4037 mUserPaddingRightInitial = (rightPadding >= 0) ? rightPadding : mUserPaddingRightInitial; 4038 } else { 4039 // Jelly Bean MR1 and after case: if start/end defined, they will override any left/right 4040 // values defined. Otherwise, left /right values are used. 4041 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4042 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4043 // defined. 4044 final boolean hasRelativePadding = startPaddingDefined || endPaddingDefined; 4045 4046 if (mLeftPaddingDefined && !hasRelativePadding) { 4047 mUserPaddingLeftInitial = leftPadding; 4048 } 4049 if (mRightPaddingDefined && !hasRelativePadding) { 4050 mUserPaddingRightInitial = rightPadding; 4051 } 4052 } 4053 4054 internalSetPadding( 4055 mUserPaddingLeftInitial, 4056 topPadding >= 0 ? topPadding : mPaddingTop, 4057 mUserPaddingRightInitial, 4058 bottomPadding >= 0 ? bottomPadding : mPaddingBottom); 4059 4060 if (viewFlagMasks != 0) { 4061 setFlags(viewFlagValues, viewFlagMasks); 4062 } 4063 4064 if (initializeScrollbars) { 4065 initializeScrollbars(a); 4066 } 4067 4068 a.recycle(); 4069 4070 // Needs to be called after mViewFlags is set 4071 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4072 recomputePadding(); 4073 } 4074 4075 if (x != 0 || y != 0) { 4076 scrollTo(x, y); 4077 } 4078 4079 if (transformSet) { 4080 setTranslationX(tx); 4081 setTranslationY(ty); 4082 setRotation(rotation); 4083 setRotationX(rotationX); 4084 setRotationY(rotationY); 4085 setScaleX(sx); 4086 setScaleY(sy); 4087 } 4088 4089 if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { 4090 setScrollContainer(true); 4091 } 4092 4093 computeOpaqueFlags(); 4094 } 4095 4096 /** 4097 * Non-public constructor for use in testing 4098 */ 4099 View() { 4100 mResources = null; 4101 } 4102 4103 public String toString() { 4104 StringBuilder out = new StringBuilder(128); 4105 out.append(getClass().getName()); 4106 out.append('{'); 4107 out.append(Integer.toHexString(System.identityHashCode(this))); 4108 out.append(' '); 4109 switch (mViewFlags&VISIBILITY_MASK) { 4110 case VISIBLE: out.append('V'); break; 4111 case INVISIBLE: out.append('I'); break; 4112 case GONE: out.append('G'); break; 4113 default: out.append('.'); break; 4114 } 4115 out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); 4116 out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); 4117 out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); 4118 out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); 4119 out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); 4120 out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); 4121 out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); 4122 out.append(' '); 4123 out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); 4124 out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); 4125 out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); 4126 if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { 4127 out.append('p'); 4128 } else { 4129 out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); 4130 } 4131 out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); 4132 out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); 4133 out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); 4134 out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); 4135 out.append(' '); 4136 out.append(mLeft); 4137 out.append(','); 4138 out.append(mTop); 4139 out.append('-'); 4140 out.append(mRight); 4141 out.append(','); 4142 out.append(mBottom); 4143 final int id = getId(); 4144 if (id != NO_ID) { 4145 out.append(" #"); 4146 out.append(Integer.toHexString(id)); 4147 final Resources r = mResources; 4148 if (id != 0 && r != null) { 4149 try { 4150 String pkgname; 4151 switch (id&0xff000000) { 4152 case 0x7f000000: 4153 pkgname="app"; 4154 break; 4155 case 0x01000000: 4156 pkgname="android"; 4157 break; 4158 default: 4159 pkgname = r.getResourcePackageName(id); 4160 break; 4161 } 4162 String typename = r.getResourceTypeName(id); 4163 String entryname = r.getResourceEntryName(id); 4164 out.append(" "); 4165 out.append(pkgname); 4166 out.append(":"); 4167 out.append(typename); 4168 out.append("/"); 4169 out.append(entryname); 4170 } catch (Resources.NotFoundException e) { 4171 } 4172 } 4173 } 4174 out.append("}"); 4175 return out.toString(); 4176 } 4177 4178 /** 4179 * <p> 4180 * Initializes the fading edges from a given set of styled attributes. This 4181 * method should be called by subclasses that need fading edges and when an 4182 * instance of these subclasses is created programmatically rather than 4183 * being inflated from XML. This method is automatically called when the XML 4184 * is inflated. 4185 * </p> 4186 * 4187 * @param a the styled attributes set to initialize the fading edges from 4188 */ 4189 protected void initializeFadingEdge(TypedArray a) { 4190 initScrollCache(); 4191 4192 mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( 4193 R.styleable.View_fadingEdgeLength, 4194 ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); 4195 } 4196 4197 /** 4198 * Returns the size of the vertical faded edges used to indicate that more 4199 * content in this view is visible. 4200 * 4201 * @return The size in pixels of the vertical faded edge or 0 if vertical 4202 * faded edges are not enabled for this view. 4203 * @attr ref android.R.styleable#View_fadingEdgeLength 4204 */ 4205 public int getVerticalFadingEdgeLength() { 4206 if (isVerticalFadingEdgeEnabled()) { 4207 ScrollabilityCache cache = mScrollCache; 4208 if (cache != null) { 4209 return cache.fadingEdgeLength; 4210 } 4211 } 4212 return 0; 4213 } 4214 4215 /** 4216 * Set the size of the faded edge used to indicate that more content in this 4217 * view is available. Will not change whether the fading edge is enabled; use 4218 * {@link #setVerticalFadingEdgeEnabled(boolean)} or 4219 * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge 4220 * for the vertical or horizontal fading edges. 4221 * 4222 * @param length The size in pixels of the faded edge used to indicate that more 4223 * content in this view is visible. 4224 */ 4225 public void setFadingEdgeLength(int length) { 4226 initScrollCache(); 4227 mScrollCache.fadingEdgeLength = length; 4228 } 4229 4230 /** 4231 * Returns the size of the horizontal faded edges used to indicate that more 4232 * content in this view is visible. 4233 * 4234 * @return The size in pixels of the horizontal faded edge or 0 if horizontal 4235 * faded edges are not enabled for this view. 4236 * @attr ref android.R.styleable#View_fadingEdgeLength 4237 */ 4238 public int getHorizontalFadingEdgeLength() { 4239 if (isHorizontalFadingEdgeEnabled()) { 4240 ScrollabilityCache cache = mScrollCache; 4241 if (cache != null) { 4242 return cache.fadingEdgeLength; 4243 } 4244 } 4245 return 0; 4246 } 4247 4248 /** 4249 * Returns the width of the vertical scrollbar. 4250 * 4251 * @return The width in pixels of the vertical scrollbar or 0 if there 4252 * is no vertical scrollbar. 4253 */ 4254 public int getVerticalScrollbarWidth() { 4255 ScrollabilityCache cache = mScrollCache; 4256 if (cache != null) { 4257 ScrollBarDrawable scrollBar = cache.scrollBar; 4258 if (scrollBar != null) { 4259 int size = scrollBar.getSize(true); 4260 if (size <= 0) { 4261 size = cache.scrollBarSize; 4262 } 4263 return size; 4264 } 4265 return 0; 4266 } 4267 return 0; 4268 } 4269 4270 /** 4271 * Returns the height of the horizontal scrollbar. 4272 * 4273 * @return The height in pixels of the horizontal scrollbar or 0 if 4274 * there is no horizontal scrollbar. 4275 */ 4276 protected int getHorizontalScrollbarHeight() { 4277 ScrollabilityCache cache = mScrollCache; 4278 if (cache != null) { 4279 ScrollBarDrawable scrollBar = cache.scrollBar; 4280 if (scrollBar != null) { 4281 int size = scrollBar.getSize(false); 4282 if (size <= 0) { 4283 size = cache.scrollBarSize; 4284 } 4285 return size; 4286 } 4287 return 0; 4288 } 4289 return 0; 4290 } 4291 4292 /** 4293 * <p> 4294 * Initializes the scrollbars from a given set of styled attributes. This 4295 * method should be called by subclasses that need scrollbars and when an 4296 * instance of these subclasses is created programmatically rather than 4297 * being inflated from XML. This method is automatically called when the XML 4298 * is inflated. 4299 * </p> 4300 * 4301 * @param a the styled attributes set to initialize the scrollbars from 4302 */ 4303 protected void initializeScrollbars(TypedArray a) { 4304 initScrollCache(); 4305 4306 final ScrollabilityCache scrollabilityCache = mScrollCache; 4307 4308 if (scrollabilityCache.scrollBar == null) { 4309 scrollabilityCache.scrollBar = new ScrollBarDrawable(); 4310 } 4311 4312 final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); 4313 4314 if (!fadeScrollbars) { 4315 scrollabilityCache.state = ScrollabilityCache.ON; 4316 } 4317 scrollabilityCache.fadeScrollBars = fadeScrollbars; 4318 4319 4320 scrollabilityCache.scrollBarFadeDuration = a.getInt( 4321 R.styleable.View_scrollbarFadeDuration, ViewConfiguration 4322 .getScrollBarFadeDuration()); 4323 scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( 4324 R.styleable.View_scrollbarDefaultDelayBeforeFade, 4325 ViewConfiguration.getScrollDefaultDelay()); 4326 4327 4328 scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( 4329 com.android.internal.R.styleable.View_scrollbarSize, 4330 ViewConfiguration.get(mContext).getScaledScrollBarSize()); 4331 4332 Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); 4333 scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); 4334 4335 Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); 4336 if (thumb != null) { 4337 scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); 4338 } 4339 4340 boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, 4341 false); 4342 if (alwaysDraw) { 4343 scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); 4344 } 4345 4346 track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); 4347 scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); 4348 4349 thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); 4350 if (thumb != null) { 4351 scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); 4352 } 4353 4354 alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, 4355 false); 4356 if (alwaysDraw) { 4357 scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); 4358 } 4359 4360 // Apply layout direction to the new Drawables if needed 4361 final int layoutDirection = getLayoutDirection(); 4362 if (track != null) { 4363 track.setLayoutDirection(layoutDirection); 4364 } 4365 if (thumb != null) { 4366 thumb.setLayoutDirection(layoutDirection); 4367 } 4368 4369 // Re-apply user/background padding so that scrollbar(s) get added 4370 resolvePadding(); 4371 } 4372 4373 /** 4374 * <p> 4375 * Initalizes the scrollability cache if necessary. 4376 * </p> 4377 */ 4378 private void initScrollCache() { 4379 if (mScrollCache == null) { 4380 mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); 4381 } 4382 } 4383 4384 private ScrollabilityCache getScrollCache() { 4385 initScrollCache(); 4386 return mScrollCache; 4387 } 4388 4389 /** 4390 * Set the position of the vertical scroll bar. Should be one of 4391 * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or 4392 * {@link #SCROLLBAR_POSITION_RIGHT}. 4393 * 4394 * @param position Where the vertical scroll bar should be positioned. 4395 */ 4396 public void setVerticalScrollbarPosition(int position) { 4397 if (mVerticalScrollbarPosition != position) { 4398 mVerticalScrollbarPosition = position; 4399 computeOpaqueFlags(); 4400 resolvePadding(); 4401 } 4402 } 4403 4404 /** 4405 * @return The position where the vertical scroll bar will show, if applicable. 4406 * @see #setVerticalScrollbarPosition(int) 4407 */ 4408 public int getVerticalScrollbarPosition() { 4409 return mVerticalScrollbarPosition; 4410 } 4411 4412 ListenerInfo getListenerInfo() { 4413 if (mListenerInfo != null) { 4414 return mListenerInfo; 4415 } 4416 mListenerInfo = new ListenerInfo(); 4417 return mListenerInfo; 4418 } 4419 4420 /** 4421 * Register a callback to be invoked when focus of this view changed. 4422 * 4423 * @param l The callback that will run. 4424 */ 4425 public void setOnFocusChangeListener(OnFocusChangeListener l) { 4426 getListenerInfo().mOnFocusChangeListener = l; 4427 } 4428 4429 /** 4430 * Add a listener that will be called when the bounds of the view change due to 4431 * layout processing. 4432 * 4433 * @param listener The listener that will be called when layout bounds change. 4434 */ 4435 public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { 4436 ListenerInfo li = getListenerInfo(); 4437 if (li.mOnLayoutChangeListeners == null) { 4438 li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); 4439 } 4440 if (!li.mOnLayoutChangeListeners.contains(listener)) { 4441 li.mOnLayoutChangeListeners.add(listener); 4442 } 4443 } 4444 4445 /** 4446 * Remove a listener for layout changes. 4447 * 4448 * @param listener The listener for layout bounds change. 4449 */ 4450 public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { 4451 ListenerInfo li = mListenerInfo; 4452 if (li == null || li.mOnLayoutChangeListeners == null) { 4453 return; 4454 } 4455 li.mOnLayoutChangeListeners.remove(listener); 4456 } 4457 4458 /** 4459 * Add a listener for attach state changes. 4460 * 4461 * This listener will be called whenever this view is attached or detached 4462 * from a window. Remove the listener using 4463 * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. 4464 * 4465 * @param listener Listener to attach 4466 * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) 4467 */ 4468 public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 4469 ListenerInfo li = getListenerInfo(); 4470 if (li.mOnAttachStateChangeListeners == null) { 4471 li.mOnAttachStateChangeListeners 4472 = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); 4473 } 4474 li.mOnAttachStateChangeListeners.add(listener); 4475 } 4476 4477 /** 4478 * Remove a listener for attach state changes. The listener will receive no further 4479 * notification of window attach/detach events. 4480 * 4481 * @param listener Listener to remove 4482 * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) 4483 */ 4484 public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 4485 ListenerInfo li = mListenerInfo; 4486 if (li == null || li.mOnAttachStateChangeListeners == null) { 4487 return; 4488 } 4489 li.mOnAttachStateChangeListeners.remove(listener); 4490 } 4491 4492 /** 4493 * Returns the focus-change callback registered for this view. 4494 * 4495 * @return The callback, or null if one is not registered. 4496 */ 4497 public OnFocusChangeListener getOnFocusChangeListener() { 4498 ListenerInfo li = mListenerInfo; 4499 return li != null ? li.mOnFocusChangeListener : null; 4500 } 4501 4502 /** 4503 * Register a callback to be invoked when this view is clicked. If this view is not 4504 * clickable, it becomes clickable. 4505 * 4506 * @param l The callback that will run 4507 * 4508 * @see #setClickable(boolean) 4509 */ 4510 public void setOnClickListener(OnClickListener l) { 4511 if (!isClickable()) { 4512 setClickable(true); 4513 } 4514 getListenerInfo().mOnClickListener = l; 4515 } 4516 4517 /** 4518 * Return whether this view has an attached OnClickListener. Returns 4519 * true if there is a listener, false if there is none. 4520 */ 4521 public boolean hasOnClickListeners() { 4522 ListenerInfo li = mListenerInfo; 4523 return (li != null && li.mOnClickListener != null); 4524 } 4525 4526 /** 4527 * Register a callback to be invoked when this view is clicked and held. If this view is not 4528 * long clickable, it becomes long clickable. 4529 * 4530 * @param l The callback that will run 4531 * 4532 * @see #setLongClickable(boolean) 4533 */ 4534 public void setOnLongClickListener(OnLongClickListener l) { 4535 if (!isLongClickable()) { 4536 setLongClickable(true); 4537 } 4538 getListenerInfo().mOnLongClickListener = l; 4539 } 4540 4541 /** 4542 * Register a callback to be invoked when the context menu for this view is 4543 * being built. If this view is not long clickable, it becomes long clickable. 4544 * 4545 * @param l The callback that will run 4546 * 4547 */ 4548 public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { 4549 if (!isLongClickable()) { 4550 setLongClickable(true); 4551 } 4552 getListenerInfo().mOnCreateContextMenuListener = l; 4553 } 4554 4555 /** 4556 * Call this view's OnClickListener, if it is defined. Performs all normal 4557 * actions associated with clicking: reporting accessibility event, playing 4558 * a sound, etc. 4559 * 4560 * @return True there was an assigned OnClickListener that was called, false 4561 * otherwise is returned. 4562 */ 4563 public boolean performClick() { 4564 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 4565 4566 ListenerInfo li = mListenerInfo; 4567 if (li != null && li.mOnClickListener != null) { 4568 playSoundEffect(SoundEffectConstants.CLICK); 4569 li.mOnClickListener.onClick(this); 4570 return true; 4571 } 4572 4573 return false; 4574 } 4575 4576 /** 4577 * Directly call any attached OnClickListener. Unlike {@link #performClick()}, 4578 * this only calls the listener, and does not do any associated clicking 4579 * actions like reporting an accessibility event. 4580 * 4581 * @return True there was an assigned OnClickListener that was called, false 4582 * otherwise is returned. 4583 */ 4584 public boolean callOnClick() { 4585 ListenerInfo li = mListenerInfo; 4586 if (li != null && li.mOnClickListener != null) { 4587 li.mOnClickListener.onClick(this); 4588 return true; 4589 } 4590 return false; 4591 } 4592 4593 /** 4594 * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the 4595 * OnLongClickListener did not consume the event. 4596 * 4597 * @return True if one of the above receivers consumed the event, false otherwise. 4598 */ 4599 public boolean performLongClick() { 4600 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); 4601 4602 boolean handled = false; 4603 ListenerInfo li = mListenerInfo; 4604 if (li != null && li.mOnLongClickListener != null) { 4605 handled = li.mOnLongClickListener.onLongClick(View.this); 4606 } 4607 if (!handled) { 4608 handled = showContextMenu(); 4609 } 4610 if (handled) { 4611 performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 4612 } 4613 return handled; 4614 } 4615 4616 /** 4617 * Performs button-related actions during a touch down event. 4618 * 4619 * @param event The event. 4620 * @return True if the down was consumed. 4621 * 4622 * @hide 4623 */ 4624 protected boolean performButtonActionOnTouchDown(MotionEvent event) { 4625 if ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { 4626 if (showContextMenu(event.getX(), event.getY(), event.getMetaState())) { 4627 return true; 4628 } 4629 } 4630 return false; 4631 } 4632 4633 /** 4634 * Bring up the context menu for this view. 4635 * 4636 * @return Whether a context menu was displayed. 4637 */ 4638 public boolean showContextMenu() { 4639 return getParent().showContextMenuForChild(this); 4640 } 4641 4642 /** 4643 * Bring up the context menu for this view, referring to the item under the specified point. 4644 * 4645 * @param x The referenced x coordinate. 4646 * @param y The referenced y coordinate. 4647 * @param metaState The keyboard modifiers that were pressed. 4648 * @return Whether a context menu was displayed. 4649 * 4650 * @hide 4651 */ 4652 public boolean showContextMenu(float x, float y, int metaState) { 4653 return showContextMenu(); 4654 } 4655 4656 /** 4657 * Start an action mode. 4658 * 4659 * @param callback Callback that will control the lifecycle of the action mode 4660 * @return The new action mode if it is started, null otherwise 4661 * 4662 * @see ActionMode 4663 */ 4664 public ActionMode startActionMode(ActionMode.Callback callback) { 4665 ViewParent parent = getParent(); 4666 if (parent == null) return null; 4667 return parent.startActionModeForChild(this, callback); 4668 } 4669 4670 /** 4671 * Register a callback to be invoked when a hardware key is pressed in this view. 4672 * Key presses in software input methods will generally not trigger the methods of 4673 * this listener. 4674 * @param l the key listener to attach to this view 4675 */ 4676 public void setOnKeyListener(OnKeyListener l) { 4677 getListenerInfo().mOnKeyListener = l; 4678 } 4679 4680 /** 4681 * Register a callback to be invoked when a touch event is sent to this view. 4682 * @param l the touch listener to attach to this view 4683 */ 4684 public void setOnTouchListener(OnTouchListener l) { 4685 getListenerInfo().mOnTouchListener = l; 4686 } 4687 4688 /** 4689 * Register a callback to be invoked when a generic motion event is sent to this view. 4690 * @param l the generic motion listener to attach to this view 4691 */ 4692 public void setOnGenericMotionListener(OnGenericMotionListener l) { 4693 getListenerInfo().mOnGenericMotionListener = l; 4694 } 4695 4696 /** 4697 * Register a callback to be invoked when a hover event is sent to this view. 4698 * @param l the hover listener to attach to this view 4699 */ 4700 public void setOnHoverListener(OnHoverListener l) { 4701 getListenerInfo().mOnHoverListener = l; 4702 } 4703 4704 /** 4705 * Register a drag event listener callback object for this View. The parameter is 4706 * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a 4707 * View, the system calls the 4708 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. 4709 * @param l An implementation of {@link android.view.View.OnDragListener}. 4710 */ 4711 public void setOnDragListener(OnDragListener l) { 4712 getListenerInfo().mOnDragListener = l; 4713 } 4714 4715 /** 4716 * Give this view focus. This will cause 4717 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. 4718 * 4719 * Note: this does not check whether this {@link View} should get focus, it just 4720 * gives it focus no matter what. It should only be called internally by framework 4721 * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. 4722 * 4723 * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, 4724 * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which 4725 * focus moved when requestFocus() is called. It may not always 4726 * apply, in which case use the default View.FOCUS_DOWN. 4727 * @param previouslyFocusedRect The rectangle of the view that had focus 4728 * prior in this View's coordinate system. 4729 */ 4730 void handleFocusGainInternal(@FocusRealDirection int direction, Rect previouslyFocusedRect) { 4731 if (DBG) { 4732 System.out.println(this + " requestFocus()"); 4733 } 4734 4735 if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { 4736 mPrivateFlags |= PFLAG_FOCUSED; 4737 4738 View oldFocus = (mAttachInfo != null) ? getRootView().findFocus() : null; 4739 4740 if (mParent != null) { 4741 mParent.requestChildFocus(this, this); 4742 } 4743 4744 if (mAttachInfo != null) { 4745 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, this); 4746 } 4747 4748 onFocusChanged(true, direction, previouslyFocusedRect); 4749 refreshDrawableState(); 4750 } 4751 } 4752 4753 /** 4754 * Request that a rectangle of this view be visible on the screen, 4755 * scrolling if necessary just enough. 4756 * 4757 * <p>A View should call this if it maintains some notion of which part 4758 * of its content is interesting. For example, a text editing view 4759 * should call this when its cursor moves. 4760 * 4761 * @param rectangle The rectangle. 4762 * @return Whether any parent scrolled. 4763 */ 4764 public boolean requestRectangleOnScreen(Rect rectangle) { 4765 return requestRectangleOnScreen(rectangle, false); 4766 } 4767 4768 /** 4769 * Request that a rectangle of this view be visible on the screen, 4770 * scrolling if necessary just enough. 4771 * 4772 * <p>A View should call this if it maintains some notion of which part 4773 * of its content is interesting. For example, a text editing view 4774 * should call this when its cursor moves. 4775 * 4776 * <p>When <code>immediate</code> is set to true, scrolling will not be 4777 * animated. 4778 * 4779 * @param rectangle The rectangle. 4780 * @param immediate True to forbid animated scrolling, false otherwise 4781 * @return Whether any parent scrolled. 4782 */ 4783 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 4784 if (mParent == null) { 4785 return false; 4786 } 4787 4788 View child = this; 4789 4790 RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); 4791 position.set(rectangle); 4792 4793 ViewParent parent = mParent; 4794 boolean scrolled = false; 4795 while (parent != null) { 4796 rectangle.set((int) position.left, (int) position.top, 4797 (int) position.right, (int) position.bottom); 4798 4799 scrolled |= parent.requestChildRectangleOnScreen(child, 4800 rectangle, immediate); 4801 4802 if (!child.hasIdentityMatrix()) { 4803 child.getMatrix().mapRect(position); 4804 } 4805 4806 position.offset(child.mLeft, child.mTop); 4807 4808 if (!(parent instanceof View)) { 4809 break; 4810 } 4811 4812 View parentView = (View) parent; 4813 4814 position.offset(-parentView.getScrollX(), -parentView.getScrollY()); 4815 4816 child = parentView; 4817 parent = child.getParent(); 4818 } 4819 4820 return scrolled; 4821 } 4822 4823 /** 4824 * Called when this view wants to give up focus. If focus is cleared 4825 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. 4826 * <p> 4827 * <strong>Note:</strong> When a View clears focus the framework is trying 4828 * to give focus to the first focusable View from the top. Hence, if this 4829 * View is the first from the top that can take focus, then all callbacks 4830 * related to clearing focus will be invoked after wich the framework will 4831 * give focus to this view. 4832 * </p> 4833 */ 4834 public void clearFocus() { 4835 if (DBG) { 4836 System.out.println(this + " clearFocus()"); 4837 } 4838 4839 clearFocusInternal(true, true); 4840 } 4841 4842 /** 4843 * Clears focus from the view, optionally propagating the change up through 4844 * the parent hierarchy and requesting that the root view place new focus. 4845 * 4846 * @param propagate whether to propagate the change up through the parent 4847 * hierarchy 4848 * @param refocus when propagate is true, specifies whether to request the 4849 * root view place new focus 4850 */ 4851 void clearFocusInternal(boolean propagate, boolean refocus) { 4852 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 4853 mPrivateFlags &= ~PFLAG_FOCUSED; 4854 4855 if (propagate && mParent != null) { 4856 mParent.clearChildFocus(this); 4857 } 4858 4859 onFocusChanged(false, 0, null); 4860 4861 refreshDrawableState(); 4862 4863 if (propagate && (!refocus || !rootViewRequestFocus())) { 4864 notifyGlobalFocusCleared(this); 4865 } 4866 } 4867 } 4868 4869 void notifyGlobalFocusCleared(View oldFocus) { 4870 if (oldFocus != null && mAttachInfo != null) { 4871 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, null); 4872 } 4873 } 4874 4875 boolean rootViewRequestFocus() { 4876 final View root = getRootView(); 4877 return root != null && root.requestFocus(); 4878 } 4879 4880 /** 4881 * Called internally by the view system when a new view is getting focus. 4882 * This is what clears the old focus. 4883 * <p> 4884 * <b>NOTE:</b> The parent view's focused child must be updated manually 4885 * after calling this method. Otherwise, the view hierarchy may be left in 4886 * an inconstent state. 4887 */ 4888 void unFocus() { 4889 if (DBG) { 4890 System.out.println(this + " unFocus()"); 4891 } 4892 4893 clearFocusInternal(false, false); 4894 } 4895 4896 /** 4897 * Returns true if this view has focus iteself, or is the ancestor of the 4898 * view that has focus. 4899 * 4900 * @return True if this view has or contains focus, false otherwise. 4901 */ 4902 @ViewDebug.ExportedProperty(category = "focus") 4903 public boolean hasFocus() { 4904 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 4905 } 4906 4907 /** 4908 * Returns true if this view is focusable or if it contains a reachable View 4909 * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" 4910 * is a View whose parents do not block descendants focus. 4911 * 4912 * Only {@link #VISIBLE} views are considered focusable. 4913 * 4914 * @return True if the view is focusable or if the view contains a focusable 4915 * View, false otherwise. 4916 * 4917 * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS 4918 */ 4919 public boolean hasFocusable() { 4920 return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); 4921 } 4922 4923 /** 4924 * Called by the view system when the focus state of this view changes. 4925 * When the focus change event is caused by directional navigation, direction 4926 * and previouslyFocusedRect provide insight into where the focus is coming from. 4927 * When overriding, be sure to call up through to the super class so that 4928 * the standard focus handling will occur. 4929 * 4930 * @param gainFocus True if the View has focus; false otherwise. 4931 * @param direction The direction focus has moved when requestFocus() 4932 * is called to give this view focus. Values are 4933 * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, 4934 * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. 4935 * It may not always apply, in which case use the default. 4936 * @param previouslyFocusedRect The rectangle, in this view's coordinate 4937 * system, of the previously focused view. If applicable, this will be 4938 * passed in as finer grained information about where the focus is coming 4939 * from (in addition to direction). Will be <code>null</code> otherwise. 4940 */ 4941 protected void onFocusChanged(boolean gainFocus, @FocusDirection int direction, 4942 @Nullable Rect previouslyFocusedRect) { 4943 if (gainFocus) { 4944 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 4945 } else { 4946 notifyViewAccessibilityStateChangedIfNeeded( 4947 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 4948 } 4949 4950 InputMethodManager imm = InputMethodManager.peekInstance(); 4951 if (!gainFocus) { 4952 if (isPressed()) { 4953 setPressed(false); 4954 } 4955 if (imm != null && mAttachInfo != null 4956 && mAttachInfo.mHasWindowFocus) { 4957 imm.focusOut(this); 4958 } 4959 onFocusLost(); 4960 } else if (imm != null && mAttachInfo != null 4961 && mAttachInfo.mHasWindowFocus) { 4962 imm.focusIn(this); 4963 } 4964 4965 invalidate(true); 4966 ListenerInfo li = mListenerInfo; 4967 if (li != null && li.mOnFocusChangeListener != null) { 4968 li.mOnFocusChangeListener.onFocusChange(this, gainFocus); 4969 } 4970 4971 if (mAttachInfo != null) { 4972 mAttachInfo.mKeyDispatchState.reset(this); 4973 } 4974 } 4975 4976 /** 4977 * Sends an accessibility event of the given type. If accessibility is 4978 * not enabled this method has no effect. The default implementation calls 4979 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first 4980 * to populate information about the event source (this View), then calls 4981 * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to 4982 * populate the text content of the event source including its descendants, 4983 * and last calls 4984 * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} 4985 * on its parent to resuest sending of the event to interested parties. 4986 * <p> 4987 * If an {@link AccessibilityDelegate} has been specified via calling 4988 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4989 * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is 4990 * responsible for handling this call. 4991 * </p> 4992 * 4993 * @param eventType The type of the event to send, as defined by several types from 4994 * {@link android.view.accessibility.AccessibilityEvent}, such as 4995 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or 4996 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. 4997 * 4998 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 4999 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5000 * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) 5001 * @see AccessibilityDelegate 5002 */ 5003 public void sendAccessibilityEvent(int eventType) { 5004 // Excluded views do not send accessibility events. 5005 if (!includeForAccessibility()) { 5006 return; 5007 } 5008 if (mAccessibilityDelegate != null) { 5009 mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); 5010 } else { 5011 sendAccessibilityEventInternal(eventType); 5012 } 5013 } 5014 5015 /** 5016 * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} 5017 * {@link AccessibilityEvent} to make an announcement which is related to some 5018 * sort of a context change for which none of the events representing UI transitions 5019 * is a good fit. For example, announcing a new page in a book. If accessibility 5020 * is not enabled this method does nothing. 5021 * 5022 * @param text The announcement text. 5023 */ 5024 public void announceForAccessibility(CharSequence text) { 5025 if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { 5026 AccessibilityEvent event = AccessibilityEvent.obtain( 5027 AccessibilityEvent.TYPE_ANNOUNCEMENT); 5028 onInitializeAccessibilityEvent(event); 5029 event.getText().add(text); 5030 event.setContentDescription(null); 5031 mParent.requestSendAccessibilityEvent(this, event); 5032 } 5033 } 5034 5035 /** 5036 * @see #sendAccessibilityEvent(int) 5037 * 5038 * Note: Called from the default {@link AccessibilityDelegate}. 5039 */ 5040 void sendAccessibilityEventInternal(int eventType) { 5041 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 5042 sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); 5043 } 5044 } 5045 5046 /** 5047 * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but 5048 * takes as an argument an empty {@link AccessibilityEvent} and does not 5049 * perform a check whether accessibility is enabled. 5050 * <p> 5051 * If an {@link AccessibilityDelegate} has been specified via calling 5052 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5053 * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} 5054 * is responsible for handling this call. 5055 * </p> 5056 * 5057 * @param event The event to send. 5058 * 5059 * @see #sendAccessibilityEvent(int) 5060 */ 5061 public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { 5062 if (mAccessibilityDelegate != null) { 5063 mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); 5064 } else { 5065 sendAccessibilityEventUncheckedInternal(event); 5066 } 5067 } 5068 5069 /** 5070 * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) 5071 * 5072 * Note: Called from the default {@link AccessibilityDelegate}. 5073 */ 5074 void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { 5075 if (!isShown()) { 5076 return; 5077 } 5078 onInitializeAccessibilityEvent(event); 5079 // Only a subset of accessibility events populates text content. 5080 if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { 5081 dispatchPopulateAccessibilityEvent(event); 5082 } 5083 // In the beginning we called #isShown(), so we know that getParent() is not null. 5084 getParent().requestSendAccessibilityEvent(this, event); 5085 } 5086 5087 /** 5088 * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then 5089 * to its children for adding their text content to the event. Note that the 5090 * event text is populated in a separate dispatch path since we add to the 5091 * event not only the text of the source but also the text of all its descendants. 5092 * A typical implementation will call 5093 * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view 5094 * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5095 * on each child. Override this method if custom population of the event text 5096 * content is required. 5097 * <p> 5098 * If an {@link AccessibilityDelegate} has been specified via calling 5099 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5100 * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} 5101 * is responsible for handling this call. 5102 * </p> 5103 * <p> 5104 * <em>Note:</em> Accessibility events of certain types are not dispatched for 5105 * populating the event text via this method. For details refer to {@link AccessibilityEvent}. 5106 * </p> 5107 * 5108 * @param event The event. 5109 * 5110 * @return True if the event population was completed. 5111 */ 5112 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 5113 if (mAccessibilityDelegate != null) { 5114 return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); 5115 } else { 5116 return dispatchPopulateAccessibilityEventInternal(event); 5117 } 5118 } 5119 5120 /** 5121 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5122 * 5123 * Note: Called from the default {@link AccessibilityDelegate}. 5124 */ 5125 boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5126 onPopulateAccessibilityEvent(event); 5127 return false; 5128 } 5129 5130 /** 5131 * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5132 * giving a chance to this View to populate the accessibility event with its 5133 * text content. While this method is free to modify event 5134 * attributes other than text content, doing so should normally be performed in 5135 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. 5136 * <p> 5137 * Example: Adding formatted date string to an accessibility event in addition 5138 * to the text added by the super implementation: 5139 * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5140 * super.onPopulateAccessibilityEvent(event); 5141 * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; 5142 * String selectedDateUtterance = DateUtils.formatDateTime(mContext, 5143 * mCurrentDate.getTimeInMillis(), flags); 5144 * event.getText().add(selectedDateUtterance); 5145 * }</pre> 5146 * <p> 5147 * If an {@link AccessibilityDelegate} has been specified via calling 5148 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5149 * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} 5150 * is responsible for handling this call. 5151 * </p> 5152 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5153 * information to the event, in case the default implementation has basic information to add. 5154 * </p> 5155 * 5156 * @param event The accessibility event which to populate. 5157 * 5158 * @see #sendAccessibilityEvent(int) 5159 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5160 */ 5161 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5162 if (mAccessibilityDelegate != null) { 5163 mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); 5164 } else { 5165 onPopulateAccessibilityEventInternal(event); 5166 } 5167 } 5168 5169 /** 5170 * @see #onPopulateAccessibilityEvent(AccessibilityEvent) 5171 * 5172 * Note: Called from the default {@link AccessibilityDelegate}. 5173 */ 5174 void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5175 } 5176 5177 /** 5178 * Initializes an {@link AccessibilityEvent} with information about 5179 * this View which is the event source. In other words, the source of 5180 * an accessibility event is the view whose state change triggered firing 5181 * the event. 5182 * <p> 5183 * Example: Setting the password property of an event in addition 5184 * to properties set by the super implementation: 5185 * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5186 * super.onInitializeAccessibilityEvent(event); 5187 * event.setPassword(true); 5188 * }</pre> 5189 * <p> 5190 * If an {@link AccessibilityDelegate} has been specified via calling 5191 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5192 * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} 5193 * is responsible for handling this call. 5194 * </p> 5195 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5196 * information to the event, in case the default implementation has basic information to add. 5197 * </p> 5198 * @param event The event to initialize. 5199 * 5200 * @see #sendAccessibilityEvent(int) 5201 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5202 */ 5203 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5204 if (mAccessibilityDelegate != null) { 5205 mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); 5206 } else { 5207 onInitializeAccessibilityEventInternal(event); 5208 } 5209 } 5210 5211 /** 5212 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5213 * 5214 * Note: Called from the default {@link AccessibilityDelegate}. 5215 */ 5216 void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 5217 event.setSource(this); 5218 event.setClassName(View.class.getName()); 5219 event.setPackageName(getContext().getPackageName()); 5220 event.setEnabled(isEnabled()); 5221 event.setContentDescription(mContentDescription); 5222 5223 switch (event.getEventType()) { 5224 case AccessibilityEvent.TYPE_VIEW_FOCUSED: { 5225 ArrayList<View> focusablesTempList = (mAttachInfo != null) 5226 ? mAttachInfo.mTempArrayList : new ArrayList<View>(); 5227 getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL); 5228 event.setItemCount(focusablesTempList.size()); 5229 event.setCurrentItemIndex(focusablesTempList.indexOf(this)); 5230 if (mAttachInfo != null) { 5231 focusablesTempList.clear(); 5232 } 5233 } break; 5234 case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED: { 5235 CharSequence text = getIterableTextForAccessibility(); 5236 if (text != null && text.length() > 0) { 5237 event.setFromIndex(getAccessibilitySelectionStart()); 5238 event.setToIndex(getAccessibilitySelectionEnd()); 5239 event.setItemCount(text.length()); 5240 } 5241 } break; 5242 } 5243 } 5244 5245 /** 5246 * Returns an {@link AccessibilityNodeInfo} representing this view from the 5247 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 5248 * This method is responsible for obtaining an accessibility node info from a 5249 * pool of reusable instances and calling 5250 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to 5251 * initialize the former. 5252 * <p> 5253 * Note: The client is responsible for recycling the obtained instance by calling 5254 * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. 5255 * </p> 5256 * 5257 * @return A populated {@link AccessibilityNodeInfo}. 5258 * 5259 * @see AccessibilityNodeInfo 5260 */ 5261 public AccessibilityNodeInfo createAccessibilityNodeInfo() { 5262 if (mAccessibilityDelegate != null) { 5263 return mAccessibilityDelegate.createAccessibilityNodeInfo(this); 5264 } else { 5265 return createAccessibilityNodeInfoInternal(); 5266 } 5267 } 5268 5269 /** 5270 * @see #createAccessibilityNodeInfo() 5271 */ 5272 AccessibilityNodeInfo createAccessibilityNodeInfoInternal() { 5273 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 5274 if (provider != null) { 5275 return provider.createAccessibilityNodeInfo(View.NO_ID); 5276 } else { 5277 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); 5278 onInitializeAccessibilityNodeInfo(info); 5279 return info; 5280 } 5281 } 5282 5283 /** 5284 * Initializes an {@link AccessibilityNodeInfo} with information about this view. 5285 * The base implementation sets: 5286 * <ul> 5287 * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> 5288 * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> 5289 * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> 5290 * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> 5291 * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> 5292 * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> 5293 * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> 5294 * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> 5295 * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> 5296 * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> 5297 * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> 5298 * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> 5299 * </ul> 5300 * <p> 5301 * Subclasses should override this method, call the super implementation, 5302 * and set additional attributes. 5303 * </p> 5304 * <p> 5305 * If an {@link AccessibilityDelegate} has been specified via calling 5306 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5307 * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} 5308 * is responsible for handling this call. 5309 * </p> 5310 * 5311 * @param info The instance to initialize. 5312 */ 5313 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 5314 if (mAccessibilityDelegate != null) { 5315 mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); 5316 } else { 5317 onInitializeAccessibilityNodeInfoInternal(info); 5318 } 5319 } 5320 5321 /** 5322 * Gets the location of this view in screen coordintates. 5323 * 5324 * @param outRect The output location 5325 */ 5326 void getBoundsOnScreen(Rect outRect) { 5327 if (mAttachInfo == null) { 5328 return; 5329 } 5330 5331 RectF position = mAttachInfo.mTmpTransformRect; 5332 position.set(0, 0, mRight - mLeft, mBottom - mTop); 5333 5334 if (!hasIdentityMatrix()) { 5335 getMatrix().mapRect(position); 5336 } 5337 5338 position.offset(mLeft, mTop); 5339 5340 ViewParent parent = mParent; 5341 while (parent instanceof View) { 5342 View parentView = (View) parent; 5343 5344 position.offset(-parentView.mScrollX, -parentView.mScrollY); 5345 5346 if (!parentView.hasIdentityMatrix()) { 5347 parentView.getMatrix().mapRect(position); 5348 } 5349 5350 position.offset(parentView.mLeft, parentView.mTop); 5351 5352 parent = parentView.mParent; 5353 } 5354 5355 if (parent instanceof ViewRootImpl) { 5356 ViewRootImpl viewRootImpl = (ViewRootImpl) parent; 5357 position.offset(0, -viewRootImpl.mCurScrollY); 5358 } 5359 5360 position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 5361 5362 outRect.set((int) (position.left + 0.5f), (int) (position.top + 0.5f), 5363 (int) (position.right + 0.5f), (int) (position.bottom + 0.5f)); 5364 } 5365 5366 /** 5367 * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 5368 * 5369 * Note: Called from the default {@link AccessibilityDelegate}. 5370 */ 5371 void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 5372 Rect bounds = mAttachInfo.mTmpInvalRect; 5373 5374 getDrawingRect(bounds); 5375 info.setBoundsInParent(bounds); 5376 5377 getBoundsOnScreen(bounds); 5378 info.setBoundsInScreen(bounds); 5379 5380 ViewParent parent = getParentForAccessibility(); 5381 if (parent instanceof View) { 5382 info.setParent((View) parent); 5383 } 5384 5385 if (mID != View.NO_ID) { 5386 View rootView = getRootView(); 5387 if (rootView == null) { 5388 rootView = this; 5389 } 5390 View label = rootView.findLabelForView(this, mID); 5391 if (label != null) { 5392 info.setLabeledBy(label); 5393 } 5394 5395 if ((mAttachInfo.mAccessibilityFetchFlags 5396 & AccessibilityNodeInfo.FLAG_REPORT_VIEW_IDS) != 0 5397 && Resources.resourceHasPackage(mID)) { 5398 try { 5399 String viewId = getResources().getResourceName(mID); 5400 info.setViewIdResourceName(viewId); 5401 } catch (Resources.NotFoundException nfe) { 5402 /* ignore */ 5403 } 5404 } 5405 } 5406 5407 if (mLabelForId != View.NO_ID) { 5408 View rootView = getRootView(); 5409 if (rootView == null) { 5410 rootView = this; 5411 } 5412 View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); 5413 if (labeled != null) { 5414 info.setLabelFor(labeled); 5415 } 5416 } 5417 5418 info.setVisibleToUser(isVisibleToUser()); 5419 5420 info.setPackageName(mContext.getPackageName()); 5421 info.setClassName(View.class.getName()); 5422 info.setContentDescription(getContentDescription()); 5423 5424 info.setEnabled(isEnabled()); 5425 info.setClickable(isClickable()); 5426 info.setFocusable(isFocusable()); 5427 info.setFocused(isFocused()); 5428 info.setAccessibilityFocused(isAccessibilityFocused()); 5429 info.setSelected(isSelected()); 5430 info.setLongClickable(isLongClickable()); 5431 info.setLiveRegion(getAccessibilityLiveRegion()); 5432 5433 // TODO: These make sense only if we are in an AdapterView but all 5434 // views can be selected. Maybe from accessibility perspective 5435 // we should report as selectable view in an AdapterView. 5436 info.addAction(AccessibilityNodeInfo.ACTION_SELECT); 5437 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); 5438 5439 if (isFocusable()) { 5440 if (isFocused()) { 5441 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); 5442 } else { 5443 info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); 5444 } 5445 } 5446 5447 if (!isAccessibilityFocused()) { 5448 info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); 5449 } else { 5450 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 5451 } 5452 5453 if (isClickable() && isEnabled()) { 5454 info.addAction(AccessibilityNodeInfo.ACTION_CLICK); 5455 } 5456 5457 if (isLongClickable() && isEnabled()) { 5458 info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); 5459 } 5460 5461 CharSequence text = getIterableTextForAccessibility(); 5462 if (text != null && text.length() > 0) { 5463 info.setTextSelection(getAccessibilitySelectionStart(), getAccessibilitySelectionEnd()); 5464 5465 info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION); 5466 info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY); 5467 info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY); 5468 info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER 5469 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD 5470 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH); 5471 } 5472 } 5473 5474 private View findLabelForView(View view, int labeledId) { 5475 if (mMatchLabelForPredicate == null) { 5476 mMatchLabelForPredicate = new MatchLabelForPredicate(); 5477 } 5478 mMatchLabelForPredicate.mLabeledId = labeledId; 5479 return findViewByPredicateInsideOut(view, mMatchLabelForPredicate); 5480 } 5481 5482 /** 5483 * Computes whether this view is visible to the user. Such a view is 5484 * attached, visible, all its predecessors are visible, it is not clipped 5485 * entirely by its predecessors, and has an alpha greater than zero. 5486 * 5487 * @return Whether the view is visible on the screen. 5488 * 5489 * @hide 5490 */ 5491 protected boolean isVisibleToUser() { 5492 return isVisibleToUser(null); 5493 } 5494 5495 /** 5496 * Computes whether the given portion of this view is visible to the user. 5497 * Such a view is attached, visible, all its predecessors are visible, 5498 * has an alpha greater than zero, and the specified portion is not 5499 * clipped entirely by its predecessors. 5500 * 5501 * @param boundInView the portion of the view to test; coordinates should be relative; may be 5502 * <code>null</code>, and the entire view will be tested in this case. 5503 * When <code>true</code> is returned by the function, the actual visible 5504 * region will be stored in this parameter; that is, if boundInView is fully 5505 * contained within the view, no modification will be made, otherwise regions 5506 * outside of the visible area of the view will be clipped. 5507 * 5508 * @return Whether the specified portion of the view is visible on the screen. 5509 * 5510 * @hide 5511 */ 5512 protected boolean isVisibleToUser(Rect boundInView) { 5513 if (mAttachInfo != null) { 5514 // Attached to invisible window means this view is not visible. 5515 if (mAttachInfo.mWindowVisibility != View.VISIBLE) { 5516 return false; 5517 } 5518 // An invisible predecessor or one with alpha zero means 5519 // that this view is not visible to the user. 5520 Object current = this; 5521 while (current instanceof View) { 5522 View view = (View) current; 5523 // We have attach info so this view is attached and there is no 5524 // need to check whether we reach to ViewRootImpl on the way up. 5525 if (view.getAlpha() <= 0 || view.getTransitionAlpha() <= 0 || 5526 view.getVisibility() != VISIBLE) { 5527 return false; 5528 } 5529 current = view.mParent; 5530 } 5531 // Check if the view is entirely covered by its predecessors. 5532 Rect visibleRect = mAttachInfo.mTmpInvalRect; 5533 Point offset = mAttachInfo.mPoint; 5534 if (!getGlobalVisibleRect(visibleRect, offset)) { 5535 return false; 5536 } 5537 // Check if the visible portion intersects the rectangle of interest. 5538 if (boundInView != null) { 5539 visibleRect.offset(-offset.x, -offset.y); 5540 return boundInView.intersect(visibleRect); 5541 } 5542 return true; 5543 } 5544 return false; 5545 } 5546 5547 /** 5548 * Returns the delegate for implementing accessibility support via 5549 * composition. For more details see {@link AccessibilityDelegate}. 5550 * 5551 * @return The delegate, or null if none set. 5552 * 5553 * @hide 5554 */ 5555 public AccessibilityDelegate getAccessibilityDelegate() { 5556 return mAccessibilityDelegate; 5557 } 5558 5559 /** 5560 * Sets a delegate for implementing accessibility support via composition as 5561 * opposed to inheritance. The delegate's primary use is for implementing 5562 * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. 5563 * 5564 * @param delegate The delegate instance. 5565 * 5566 * @see AccessibilityDelegate 5567 */ 5568 public void setAccessibilityDelegate(AccessibilityDelegate delegate) { 5569 mAccessibilityDelegate = delegate; 5570 } 5571 5572 /** 5573 * Gets the provider for managing a virtual view hierarchy rooted at this View 5574 * and reported to {@link android.accessibilityservice.AccessibilityService}s 5575 * that explore the window content. 5576 * <p> 5577 * If this method returns an instance, this instance is responsible for managing 5578 * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this 5579 * View including the one representing the View itself. Similarly the returned 5580 * instance is responsible for performing accessibility actions on any virtual 5581 * view or the root view itself. 5582 * </p> 5583 * <p> 5584 * If an {@link AccessibilityDelegate} has been specified via calling 5585 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5586 * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} 5587 * is responsible for handling this call. 5588 * </p> 5589 * 5590 * @return The provider. 5591 * 5592 * @see AccessibilityNodeProvider 5593 */ 5594 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 5595 if (mAccessibilityDelegate != null) { 5596 return mAccessibilityDelegate.getAccessibilityNodeProvider(this); 5597 } else { 5598 return null; 5599 } 5600 } 5601 5602 /** 5603 * Gets the unique identifier of this view on the screen for accessibility purposes. 5604 * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. 5605 * 5606 * @return The view accessibility id. 5607 * 5608 * @hide 5609 */ 5610 public int getAccessibilityViewId() { 5611 if (mAccessibilityViewId == NO_ID) { 5612 mAccessibilityViewId = sNextAccessibilityViewId++; 5613 } 5614 return mAccessibilityViewId; 5615 } 5616 5617 /** 5618 * Gets the unique identifier of the window in which this View reseides. 5619 * 5620 * @return The window accessibility id. 5621 * 5622 * @hide 5623 */ 5624 public int getAccessibilityWindowId() { 5625 return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId : NO_ID; 5626 } 5627 5628 /** 5629 * Gets the {@link View} description. It briefly describes the view and is 5630 * primarily used for accessibility support. Set this property to enable 5631 * better accessibility support for your application. This is especially 5632 * true for views that do not have textual representation (For example, 5633 * ImageButton). 5634 * 5635 * @return The content description. 5636 * 5637 * @attr ref android.R.styleable#View_contentDescription 5638 */ 5639 @ViewDebug.ExportedProperty(category = "accessibility") 5640 public CharSequence getContentDescription() { 5641 return mContentDescription; 5642 } 5643 5644 /** 5645 * Sets the {@link View} description. It briefly describes the view and is 5646 * primarily used for accessibility support. Set this property to enable 5647 * better accessibility support for your application. This is especially 5648 * true for views that do not have textual representation (For example, 5649 * ImageButton). 5650 * 5651 * @param contentDescription The content description. 5652 * 5653 * @attr ref android.R.styleable#View_contentDescription 5654 */ 5655 @RemotableViewMethod 5656 public void setContentDescription(CharSequence contentDescription) { 5657 if (mContentDescription == null) { 5658 if (contentDescription == null) { 5659 return; 5660 } 5661 } else if (mContentDescription.equals(contentDescription)) { 5662 return; 5663 } 5664 mContentDescription = contentDescription; 5665 final boolean nonEmptyDesc = contentDescription != null && contentDescription.length() > 0; 5666 if (nonEmptyDesc && getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 5667 setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); 5668 notifySubtreeAccessibilityStateChangedIfNeeded(); 5669 } else { 5670 notifyViewAccessibilityStateChangedIfNeeded( 5671 AccessibilityEvent.CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION); 5672 } 5673 } 5674 5675 /** 5676 * Gets the id of a view for which this view serves as a label for 5677 * accessibility purposes. 5678 * 5679 * @return The labeled view id. 5680 */ 5681 @ViewDebug.ExportedProperty(category = "accessibility") 5682 public int getLabelFor() { 5683 return mLabelForId; 5684 } 5685 5686 /** 5687 * Sets the id of a view for which this view serves as a label for 5688 * accessibility purposes. 5689 * 5690 * @param id The labeled view id. 5691 */ 5692 @RemotableViewMethod 5693 public void setLabelFor(int id) { 5694 mLabelForId = id; 5695 if (mLabelForId != View.NO_ID 5696 && mID == View.NO_ID) { 5697 mID = generateViewId(); 5698 } 5699 } 5700 5701 /** 5702 * Invoked whenever this view loses focus, either by losing window focus or by losing 5703 * focus within its window. This method can be used to clear any state tied to the 5704 * focus. For instance, if a button is held pressed with the trackball and the window 5705 * loses focus, this method can be used to cancel the press. 5706 * 5707 * Subclasses of View overriding this method should always call super.onFocusLost(). 5708 * 5709 * @see #onFocusChanged(boolean, int, android.graphics.Rect) 5710 * @see #onWindowFocusChanged(boolean) 5711 * 5712 * @hide pending API council approval 5713 */ 5714 protected void onFocusLost() { 5715 resetPressedState(); 5716 } 5717 5718 private void resetPressedState() { 5719 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 5720 return; 5721 } 5722 5723 if (isPressed()) { 5724 setPressed(false); 5725 5726 if (!mHasPerformedLongPress) { 5727 removeLongPressCallback(); 5728 } 5729 } 5730 } 5731 5732 /** 5733 * Returns true if this view has focus 5734 * 5735 * @return True if this view has focus, false otherwise. 5736 */ 5737 @ViewDebug.ExportedProperty(category = "focus") 5738 public boolean isFocused() { 5739 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 5740 } 5741 5742 /** 5743 * Find the view in the hierarchy rooted at this view that currently has 5744 * focus. 5745 * 5746 * @return The view that currently has focus, or null if no focused view can 5747 * be found. 5748 */ 5749 public View findFocus() { 5750 return (mPrivateFlags & PFLAG_FOCUSED) != 0 ? this : null; 5751 } 5752 5753 /** 5754 * Indicates whether this view is one of the set of scrollable containers in 5755 * its window. 5756 * 5757 * @return whether this view is one of the set of scrollable containers in 5758 * its window 5759 * 5760 * @attr ref android.R.styleable#View_isScrollContainer 5761 */ 5762 public boolean isScrollContainer() { 5763 return (mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0; 5764 } 5765 5766 /** 5767 * Change whether this view is one of the set of scrollable containers in 5768 * its window. This will be used to determine whether the window can 5769 * resize or must pan when a soft input area is open -- scrollable 5770 * containers allow the window to use resize mode since the container 5771 * will appropriately shrink. 5772 * 5773 * @attr ref android.R.styleable#View_isScrollContainer 5774 */ 5775 public void setScrollContainer(boolean isScrollContainer) { 5776 if (isScrollContainer) { 5777 if (mAttachInfo != null && (mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) == 0) { 5778 mAttachInfo.mScrollContainers.add(this); 5779 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 5780 } 5781 mPrivateFlags |= PFLAG_SCROLL_CONTAINER; 5782 } else { 5783 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 5784 mAttachInfo.mScrollContainers.remove(this); 5785 } 5786 mPrivateFlags &= ~(PFLAG_SCROLL_CONTAINER|PFLAG_SCROLL_CONTAINER_ADDED); 5787 } 5788 } 5789 5790 /** 5791 * Returns the quality of the drawing cache. 5792 * 5793 * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 5794 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 5795 * 5796 * @see #setDrawingCacheQuality(int) 5797 * @see #setDrawingCacheEnabled(boolean) 5798 * @see #isDrawingCacheEnabled() 5799 * 5800 * @attr ref android.R.styleable#View_drawingCacheQuality 5801 */ 5802 @DrawingCacheQuality 5803 public int getDrawingCacheQuality() { 5804 return mViewFlags & DRAWING_CACHE_QUALITY_MASK; 5805 } 5806 5807 /** 5808 * Set the drawing cache quality of this view. This value is used only when the 5809 * drawing cache is enabled 5810 * 5811 * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 5812 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 5813 * 5814 * @see #getDrawingCacheQuality() 5815 * @see #setDrawingCacheEnabled(boolean) 5816 * @see #isDrawingCacheEnabled() 5817 * 5818 * @attr ref android.R.styleable#View_drawingCacheQuality 5819 */ 5820 public void setDrawingCacheQuality(@DrawingCacheQuality int quality) { 5821 setFlags(quality, DRAWING_CACHE_QUALITY_MASK); 5822 } 5823 5824 /** 5825 * Returns whether the screen should remain on, corresponding to the current 5826 * value of {@link #KEEP_SCREEN_ON}. 5827 * 5828 * @return Returns true if {@link #KEEP_SCREEN_ON} is set. 5829 * 5830 * @see #setKeepScreenOn(boolean) 5831 * 5832 * @attr ref android.R.styleable#View_keepScreenOn 5833 */ 5834 public boolean getKeepScreenOn() { 5835 return (mViewFlags & KEEP_SCREEN_ON) != 0; 5836 } 5837 5838 /** 5839 * Controls whether the screen should remain on, modifying the 5840 * value of {@link #KEEP_SCREEN_ON}. 5841 * 5842 * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. 5843 * 5844 * @see #getKeepScreenOn() 5845 * 5846 * @attr ref android.R.styleable#View_keepScreenOn 5847 */ 5848 public void setKeepScreenOn(boolean keepScreenOn) { 5849 setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); 5850 } 5851 5852 /** 5853 * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 5854 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5855 * 5856 * @attr ref android.R.styleable#View_nextFocusLeft 5857 */ 5858 public int getNextFocusLeftId() { 5859 return mNextFocusLeftId; 5860 } 5861 5862 /** 5863 * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 5864 * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should 5865 * decide automatically. 5866 * 5867 * @attr ref android.R.styleable#View_nextFocusLeft 5868 */ 5869 public void setNextFocusLeftId(int nextFocusLeftId) { 5870 mNextFocusLeftId = nextFocusLeftId; 5871 } 5872 5873 /** 5874 * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 5875 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5876 * 5877 * @attr ref android.R.styleable#View_nextFocusRight 5878 */ 5879 public int getNextFocusRightId() { 5880 return mNextFocusRightId; 5881 } 5882 5883 /** 5884 * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 5885 * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should 5886 * decide automatically. 5887 * 5888 * @attr ref android.R.styleable#View_nextFocusRight 5889 */ 5890 public void setNextFocusRightId(int nextFocusRightId) { 5891 mNextFocusRightId = nextFocusRightId; 5892 } 5893 5894 /** 5895 * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. 5896 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5897 * 5898 * @attr ref android.R.styleable#View_nextFocusUp 5899 */ 5900 public int getNextFocusUpId() { 5901 return mNextFocusUpId; 5902 } 5903 5904 /** 5905 * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. 5906 * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should 5907 * decide automatically. 5908 * 5909 * @attr ref android.R.styleable#View_nextFocusUp 5910 */ 5911 public void setNextFocusUpId(int nextFocusUpId) { 5912 mNextFocusUpId = nextFocusUpId; 5913 } 5914 5915 /** 5916 * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 5917 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5918 * 5919 * @attr ref android.R.styleable#View_nextFocusDown 5920 */ 5921 public int getNextFocusDownId() { 5922 return mNextFocusDownId; 5923 } 5924 5925 /** 5926 * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 5927 * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should 5928 * decide automatically. 5929 * 5930 * @attr ref android.R.styleable#View_nextFocusDown 5931 */ 5932 public void setNextFocusDownId(int nextFocusDownId) { 5933 mNextFocusDownId = nextFocusDownId; 5934 } 5935 5936 /** 5937 * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 5938 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5939 * 5940 * @attr ref android.R.styleable#View_nextFocusForward 5941 */ 5942 public int getNextFocusForwardId() { 5943 return mNextFocusForwardId; 5944 } 5945 5946 /** 5947 * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 5948 * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should 5949 * decide automatically. 5950 * 5951 * @attr ref android.R.styleable#View_nextFocusForward 5952 */ 5953 public void setNextFocusForwardId(int nextFocusForwardId) { 5954 mNextFocusForwardId = nextFocusForwardId; 5955 } 5956 5957 /** 5958 * Returns the visibility of this view and all of its ancestors 5959 * 5960 * @return True if this view and all of its ancestors are {@link #VISIBLE} 5961 */ 5962 public boolean isShown() { 5963 View current = this; 5964 //noinspection ConstantConditions 5965 do { 5966 if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { 5967 return false; 5968 } 5969 ViewParent parent = current.mParent; 5970 if (parent == null) { 5971 return false; // We are not attached to the view root 5972 } 5973 if (!(parent instanceof View)) { 5974 return true; 5975 } 5976 current = (View) parent; 5977 } while (current != null); 5978 5979 return false; 5980 } 5981 5982 /** 5983 * Called by the view hierarchy when the content insets for a window have 5984 * changed, to allow it to adjust its content to fit within those windows. 5985 * The content insets tell you the space that the status bar, input method, 5986 * and other system windows infringe on the application's window. 5987 * 5988 * <p>You do not normally need to deal with this function, since the default 5989 * window decoration given to applications takes care of applying it to the 5990 * content of the window. If you use {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 5991 * or {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} this will not be the case, 5992 * and your content can be placed under those system elements. You can then 5993 * use this method within your view hierarchy if you have parts of your UI 5994 * which you would like to ensure are not being covered. 5995 * 5996 * <p>The default implementation of this method simply applies the content 5997 * insets to the view's padding, consuming that content (modifying the 5998 * insets to be 0), and returning true. This behavior is off by default, but can 5999 * be enabled through {@link #setFitsSystemWindows(boolean)}. 6000 * 6001 * <p>This function's traversal down the hierarchy is depth-first. The same content 6002 * insets object is propagated down the hierarchy, so any changes made to it will 6003 * be seen by all following views (including potentially ones above in 6004 * the hierarchy since this is a depth-first traversal). The first view 6005 * that returns true will abort the entire traversal. 6006 * 6007 * <p>The default implementation works well for a situation where it is 6008 * used with a container that covers the entire window, allowing it to 6009 * apply the appropriate insets to its content on all edges. If you need 6010 * a more complicated layout (such as two different views fitting system 6011 * windows, one on the top of the window, and one on the bottom), 6012 * you can override the method and handle the insets however you would like. 6013 * Note that the insets provided by the framework are always relative to the 6014 * far edges of the window, not accounting for the location of the called view 6015 * within that window. (In fact when this method is called you do not yet know 6016 * where the layout will place the view, as it is done before layout happens.) 6017 * 6018 * <p>Note: unlike many View methods, there is no dispatch phase to this 6019 * call. If you are overriding it in a ViewGroup and want to allow the 6020 * call to continue to your children, you must be sure to call the super 6021 * implementation. 6022 * 6023 * <p>Here is a sample layout that makes use of fitting system windows 6024 * to have controls for a video view placed inside of the window decorations 6025 * that it hides and shows. This can be used with code like the second 6026 * sample (video player) shown in {@link #setSystemUiVisibility(int)}. 6027 * 6028 * {@sample development/samples/ApiDemos/res/layout/video_player.xml complete} 6029 * 6030 * @param insets Current content insets of the window. Prior to 6031 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN} you must not modify 6032 * the insets or else you and Android will be unhappy. 6033 * 6034 * @return {@code true} if this view applied the insets and it should not 6035 * continue propagating further down the hierarchy, {@code false} otherwise. 6036 * @see #getFitsSystemWindows() 6037 * @see #setFitsSystemWindows(boolean) 6038 * @see #setSystemUiVisibility(int) 6039 */ 6040 protected boolean fitSystemWindows(Rect insets) { 6041 if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { 6042 mUserPaddingStart = UNDEFINED_PADDING; 6043 mUserPaddingEnd = UNDEFINED_PADDING; 6044 Rect localInsets = sThreadLocal.get(); 6045 if (localInsets == null) { 6046 localInsets = new Rect(); 6047 sThreadLocal.set(localInsets); 6048 } 6049 boolean res = computeFitSystemWindows(insets, localInsets); 6050 mUserPaddingLeftInitial = localInsets.left; 6051 mUserPaddingRightInitial = localInsets.right; 6052 internalSetPadding(localInsets.left, localInsets.top, 6053 localInsets.right, localInsets.bottom); 6054 return res; 6055 } 6056 return false; 6057 } 6058 6059 /** 6060 * @hide Compute the insets that should be consumed by this view and the ones 6061 * that should propagate to those under it. 6062 */ 6063 protected boolean computeFitSystemWindows(Rect inoutInsets, Rect outLocalInsets) { 6064 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 6065 || mAttachInfo == null 6066 || ((mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0 6067 && !mAttachInfo.mOverscanRequested)) { 6068 outLocalInsets.set(inoutInsets); 6069 inoutInsets.set(0, 0, 0, 0); 6070 return true; 6071 } else { 6072 // The application wants to take care of fitting system window for 6073 // the content... however we still need to take care of any overscan here. 6074 final Rect overscan = mAttachInfo.mOverscanInsets; 6075 outLocalInsets.set(overscan); 6076 inoutInsets.left -= overscan.left; 6077 inoutInsets.top -= overscan.top; 6078 inoutInsets.right -= overscan.right; 6079 inoutInsets.bottom -= overscan.bottom; 6080 return false; 6081 } 6082 } 6083 6084 /** 6085 * Sets whether or not this view should account for system screen decorations 6086 * such as the status bar and inset its content; that is, controlling whether 6087 * the default implementation of {@link #fitSystemWindows(Rect)} will be 6088 * executed. See that method for more details. 6089 * 6090 * <p>Note that if you are providing your own implementation of 6091 * {@link #fitSystemWindows(Rect)}, then there is no need to set this 6092 * flag to true -- your implementation will be overriding the default 6093 * implementation that checks this flag. 6094 * 6095 * @param fitSystemWindows If true, then the default implementation of 6096 * {@link #fitSystemWindows(Rect)} will be executed. 6097 * 6098 * @attr ref android.R.styleable#View_fitsSystemWindows 6099 * @see #getFitsSystemWindows() 6100 * @see #fitSystemWindows(Rect) 6101 * @see #setSystemUiVisibility(int) 6102 */ 6103 public void setFitsSystemWindows(boolean fitSystemWindows) { 6104 setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); 6105 } 6106 6107 /** 6108 * Check for state of {@link #setFitsSystemWindows(boolean)}. If this method 6109 * returns {@code true}, the default implementation of {@link #fitSystemWindows(Rect)} 6110 * will be executed. 6111 * 6112 * @return {@code true} if the default implementation of 6113 * {@link #fitSystemWindows(Rect)} will be executed. 6114 * 6115 * @attr ref android.R.styleable#View_fitsSystemWindows 6116 * @see #setFitsSystemWindows(boolean) 6117 * @see #fitSystemWindows(Rect) 6118 * @see #setSystemUiVisibility(int) 6119 */ 6120 public boolean getFitsSystemWindows() { 6121 return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; 6122 } 6123 6124 /** @hide */ 6125 public boolean fitsSystemWindows() { 6126 return getFitsSystemWindows(); 6127 } 6128 6129 /** 6130 * Ask that a new dispatch of {@link #fitSystemWindows(Rect)} be performed. 6131 */ 6132 public void requestFitSystemWindows() { 6133 if (mParent != null) { 6134 mParent.requestFitSystemWindows(); 6135 } 6136 } 6137 6138 /** 6139 * For use by PhoneWindow to make its own system window fitting optional. 6140 * @hide 6141 */ 6142 public void makeOptionalFitsSystemWindows() { 6143 setFlags(OPTIONAL_FITS_SYSTEM_WINDOWS, OPTIONAL_FITS_SYSTEM_WINDOWS); 6144 } 6145 6146 /** 6147 * Returns the visibility status for this view. 6148 * 6149 * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 6150 * @attr ref android.R.styleable#View_visibility 6151 */ 6152 @ViewDebug.ExportedProperty(mapping = { 6153 @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), 6154 @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), 6155 @ViewDebug.IntToString(from = GONE, to = "GONE") 6156 }) 6157 @Visibility 6158 public int getVisibility() { 6159 return mViewFlags & VISIBILITY_MASK; 6160 } 6161 6162 /** 6163 * Set the enabled state of this view. 6164 * 6165 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 6166 * @attr ref android.R.styleable#View_visibility 6167 */ 6168 @RemotableViewMethod 6169 public void setVisibility(@Visibility int visibility) { 6170 setFlags(visibility, VISIBILITY_MASK); 6171 if (mBackground != null) mBackground.setVisible(visibility == VISIBLE, false); 6172 } 6173 6174 /** 6175 * Returns the enabled status for this view. The interpretation of the 6176 * enabled state varies by subclass. 6177 * 6178 * @return True if this view is enabled, false otherwise. 6179 */ 6180 @ViewDebug.ExportedProperty 6181 public boolean isEnabled() { 6182 return (mViewFlags & ENABLED_MASK) == ENABLED; 6183 } 6184 6185 /** 6186 * Set the enabled state of this view. The interpretation of the enabled 6187 * state varies by subclass. 6188 * 6189 * @param enabled True if this view is enabled, false otherwise. 6190 */ 6191 @RemotableViewMethod 6192 public void setEnabled(boolean enabled) { 6193 if (enabled == isEnabled()) return; 6194 6195 setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); 6196 6197 /* 6198 * The View most likely has to change its appearance, so refresh 6199 * the drawable state. 6200 */ 6201 refreshDrawableState(); 6202 6203 // Invalidate too, since the default behavior for views is to be 6204 // be drawn at 50% alpha rather than to change the drawable. 6205 invalidate(true); 6206 6207 if (!enabled) { 6208 cancelPendingInputEvents(); 6209 } 6210 } 6211 6212 /** 6213 * Set whether this view can receive the focus. 6214 * 6215 * Setting this to false will also ensure that this view is not focusable 6216 * in touch mode. 6217 * 6218 * @param focusable If true, this view can receive the focus. 6219 * 6220 * @see #setFocusableInTouchMode(boolean) 6221 * @attr ref android.R.styleable#View_focusable 6222 */ 6223 public void setFocusable(boolean focusable) { 6224 if (!focusable) { 6225 setFlags(0, FOCUSABLE_IN_TOUCH_MODE); 6226 } 6227 setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); 6228 } 6229 6230 /** 6231 * Set whether this view can receive focus while in touch mode. 6232 * 6233 * Setting this to true will also ensure that this view is focusable. 6234 * 6235 * @param focusableInTouchMode If true, this view can receive the focus while 6236 * in touch mode. 6237 * 6238 * @see #setFocusable(boolean) 6239 * @attr ref android.R.styleable#View_focusableInTouchMode 6240 */ 6241 public void setFocusableInTouchMode(boolean focusableInTouchMode) { 6242 // Focusable in touch mode should always be set before the focusable flag 6243 // otherwise, setting the focusable flag will trigger a focusableViewAvailable() 6244 // which, in touch mode, will not successfully request focus on this view 6245 // because the focusable in touch mode flag is not set 6246 setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); 6247 if (focusableInTouchMode) { 6248 setFlags(FOCUSABLE, FOCUSABLE_MASK); 6249 } 6250 } 6251 6252 /** 6253 * Set whether this view should have sound effects enabled for events such as 6254 * clicking and touching. 6255 * 6256 * <p>You may wish to disable sound effects for a view if you already play sounds, 6257 * for instance, a dial key that plays dtmf tones. 6258 * 6259 * @param soundEffectsEnabled whether sound effects are enabled for this view. 6260 * @see #isSoundEffectsEnabled() 6261 * @see #playSoundEffect(int) 6262 * @attr ref android.R.styleable#View_soundEffectsEnabled 6263 */ 6264 public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { 6265 setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); 6266 } 6267 6268 /** 6269 * @return whether this view should have sound effects enabled for events such as 6270 * clicking and touching. 6271 * 6272 * @see #setSoundEffectsEnabled(boolean) 6273 * @see #playSoundEffect(int) 6274 * @attr ref android.R.styleable#View_soundEffectsEnabled 6275 */ 6276 @ViewDebug.ExportedProperty 6277 public boolean isSoundEffectsEnabled() { 6278 return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); 6279 } 6280 6281 /** 6282 * Set whether this view should have haptic feedback for events such as 6283 * long presses. 6284 * 6285 * <p>You may wish to disable haptic feedback if your view already controls 6286 * its own haptic feedback. 6287 * 6288 * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. 6289 * @see #isHapticFeedbackEnabled() 6290 * @see #performHapticFeedback(int) 6291 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 6292 */ 6293 public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { 6294 setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); 6295 } 6296 6297 /** 6298 * @return whether this view should have haptic feedback enabled for events 6299 * long presses. 6300 * 6301 * @see #setHapticFeedbackEnabled(boolean) 6302 * @see #performHapticFeedback(int) 6303 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 6304 */ 6305 @ViewDebug.ExportedProperty 6306 public boolean isHapticFeedbackEnabled() { 6307 return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); 6308 } 6309 6310 /** 6311 * Returns the layout direction for this view. 6312 * 6313 * @return One of {@link #LAYOUT_DIRECTION_LTR}, 6314 * {@link #LAYOUT_DIRECTION_RTL}, 6315 * {@link #LAYOUT_DIRECTION_INHERIT} or 6316 * {@link #LAYOUT_DIRECTION_LOCALE}. 6317 * 6318 * @attr ref android.R.styleable#View_layoutDirection 6319 * 6320 * @hide 6321 */ 6322 @ViewDebug.ExportedProperty(category = "layout", mapping = { 6323 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), 6324 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), 6325 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), 6326 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") 6327 }) 6328 @LayoutDir 6329 public int getRawLayoutDirection() { 6330 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 6331 } 6332 6333 /** 6334 * Set the layout direction for this view. This will propagate a reset of layout direction 6335 * resolution to the view's children and resolve layout direction for this view. 6336 * 6337 * @param layoutDirection the layout direction to set. Should be one of: 6338 * 6339 * {@link #LAYOUT_DIRECTION_LTR}, 6340 * {@link #LAYOUT_DIRECTION_RTL}, 6341 * {@link #LAYOUT_DIRECTION_INHERIT}, 6342 * {@link #LAYOUT_DIRECTION_LOCALE}. 6343 * 6344 * Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution 6345 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 6346 * will return the default {@link #LAYOUT_DIRECTION_LTR}. 6347 * 6348 * @attr ref android.R.styleable#View_layoutDirection 6349 */ 6350 @RemotableViewMethod 6351 public void setLayoutDirection(@LayoutDir int layoutDirection) { 6352 if (getRawLayoutDirection() != layoutDirection) { 6353 // Reset the current layout direction and the resolved one 6354 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_MASK; 6355 resetRtlProperties(); 6356 // Set the new layout direction (filtered) 6357 mPrivateFlags2 |= 6358 ((layoutDirection << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) & PFLAG2_LAYOUT_DIRECTION_MASK); 6359 // We need to resolve all RTL properties as they all depend on layout direction 6360 resolveRtlPropertiesIfNeeded(); 6361 requestLayout(); 6362 invalidate(true); 6363 } 6364 } 6365 6366 /** 6367 * Returns the resolved layout direction for this view. 6368 * 6369 * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns 6370 * {@link #LAYOUT_DIRECTION_LTR} if the layout direction is not RTL. 6371 * 6372 * For compatibility, this will return {@link #LAYOUT_DIRECTION_LTR} if API version 6373 * is lower than {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}. 6374 * 6375 * @attr ref android.R.styleable#View_layoutDirection 6376 */ 6377 @ViewDebug.ExportedProperty(category = "layout", mapping = { 6378 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), 6379 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") 6380 }) 6381 @ResolvedLayoutDir 6382 public int getLayoutDirection() { 6383 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 6384 if (targetSdkVersion < JELLY_BEAN_MR1) { 6385 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 6386 return LAYOUT_DIRECTION_RESOLVED_DEFAULT; 6387 } 6388 return ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) == 6389 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) ? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; 6390 } 6391 6392 /** 6393 * Indicates whether or not this view's layout is right-to-left. This is resolved from 6394 * layout attribute and/or the inherited value from the parent 6395 * 6396 * @return true if the layout is right-to-left. 6397 * 6398 * @hide 6399 */ 6400 @ViewDebug.ExportedProperty(category = "layout") 6401 public boolean isLayoutRtl() { 6402 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 6403 } 6404 6405 /** 6406 * Indicates whether the view is currently tracking transient state that the 6407 * app should not need to concern itself with saving and restoring, but that 6408 * the framework should take special note to preserve when possible. 6409 * 6410 * <p>A view with transient state cannot be trivially rebound from an external 6411 * data source, such as an adapter binding item views in a list. This may be 6412 * because the view is performing an animation, tracking user selection 6413 * of content, or similar.</p> 6414 * 6415 * @return true if the view has transient state 6416 */ 6417 @ViewDebug.ExportedProperty(category = "layout") 6418 public boolean hasTransientState() { 6419 return (mPrivateFlags2 & PFLAG2_HAS_TRANSIENT_STATE) == PFLAG2_HAS_TRANSIENT_STATE; 6420 } 6421 6422 /** 6423 * Set whether this view is currently tracking transient state that the 6424 * framework should attempt to preserve when possible. This flag is reference counted, 6425 * so every call to setHasTransientState(true) should be paired with a later call 6426 * to setHasTransientState(false). 6427 * 6428 * <p>A view with transient state cannot be trivially rebound from an external 6429 * data source, such as an adapter binding item views in a list. This may be 6430 * because the view is performing an animation, tracking user selection 6431 * of content, or similar.</p> 6432 * 6433 * @param hasTransientState true if this view has transient state 6434 */ 6435 public void setHasTransientState(boolean hasTransientState) { 6436 mTransientStateCount = hasTransientState ? mTransientStateCount + 1 : 6437 mTransientStateCount - 1; 6438 if (mTransientStateCount < 0) { 6439 mTransientStateCount = 0; 6440 Log.e(VIEW_LOG_TAG, "hasTransientState decremented below 0: " + 6441 "unmatched pair of setHasTransientState calls"); 6442 } else if ((hasTransientState && mTransientStateCount == 1) || 6443 (!hasTransientState && mTransientStateCount == 0)) { 6444 // update flag if we've just incremented up from 0 or decremented down to 0 6445 mPrivateFlags2 = (mPrivateFlags2 & ~PFLAG2_HAS_TRANSIENT_STATE) | 6446 (hasTransientState ? PFLAG2_HAS_TRANSIENT_STATE : 0); 6447 if (mParent != null) { 6448 try { 6449 mParent.childHasTransientStateChanged(this, hasTransientState); 6450 } catch (AbstractMethodError e) { 6451 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 6452 " does not fully implement ViewParent", e); 6453 } 6454 } 6455 } 6456 } 6457 6458 /** 6459 * Returns true if this view is currently attached to a window. 6460 */ 6461 public boolean isAttachedToWindow() { 6462 return mAttachInfo != null; 6463 } 6464 6465 /** 6466 * Returns true if this view has been through at least one layout since it 6467 * was last attached to or detached from a window. 6468 */ 6469 public boolean isLaidOut() { 6470 return (mPrivateFlags3 & PFLAG3_IS_LAID_OUT) == PFLAG3_IS_LAID_OUT; 6471 } 6472 6473 /** 6474 * If this view doesn't do any drawing on its own, set this flag to 6475 * allow further optimizations. By default, this flag is not set on 6476 * View, but could be set on some View subclasses such as ViewGroup. 6477 * 6478 * Typically, if you override {@link #onDraw(android.graphics.Canvas)} 6479 * you should clear this flag. 6480 * 6481 * @param willNotDraw whether or not this View draw on its own 6482 */ 6483 public void setWillNotDraw(boolean willNotDraw) { 6484 setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); 6485 } 6486 6487 /** 6488 * Returns whether or not this View draws on its own. 6489 * 6490 * @return true if this view has nothing to draw, false otherwise 6491 */ 6492 @ViewDebug.ExportedProperty(category = "drawing") 6493 public boolean willNotDraw() { 6494 return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; 6495 } 6496 6497 /** 6498 * When a View's drawing cache is enabled, drawing is redirected to an 6499 * offscreen bitmap. Some views, like an ImageView, must be able to 6500 * bypass this mechanism if they already draw a single bitmap, to avoid 6501 * unnecessary usage of the memory. 6502 * 6503 * @param willNotCacheDrawing true if this view does not cache its 6504 * drawing, false otherwise 6505 */ 6506 public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { 6507 setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); 6508 } 6509 6510 /** 6511 * Returns whether or not this View can cache its drawing or not. 6512 * 6513 * @return true if this view does not cache its drawing, false otherwise 6514 */ 6515 @ViewDebug.ExportedProperty(category = "drawing") 6516 public boolean willNotCacheDrawing() { 6517 return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; 6518 } 6519 6520 /** 6521 * Indicates whether this view reacts to click events or not. 6522 * 6523 * @return true if the view is clickable, false otherwise 6524 * 6525 * @see #setClickable(boolean) 6526 * @attr ref android.R.styleable#View_clickable 6527 */ 6528 @ViewDebug.ExportedProperty 6529 public boolean isClickable() { 6530 return (mViewFlags & CLICKABLE) == CLICKABLE; 6531 } 6532 6533 /** 6534 * Enables or disables click events for this view. When a view 6535 * is clickable it will change its state to "pressed" on every click. 6536 * Subclasses should set the view clickable to visually react to 6537 * user's clicks. 6538 * 6539 * @param clickable true to make the view clickable, false otherwise 6540 * 6541 * @see #isClickable() 6542 * @attr ref android.R.styleable#View_clickable 6543 */ 6544 public void setClickable(boolean clickable) { 6545 setFlags(clickable ? CLICKABLE : 0, CLICKABLE); 6546 } 6547 6548 /** 6549 * Indicates whether this view reacts to long click events or not. 6550 * 6551 * @return true if the view is long clickable, false otherwise 6552 * 6553 * @see #setLongClickable(boolean) 6554 * @attr ref android.R.styleable#View_longClickable 6555 */ 6556 public boolean isLongClickable() { 6557 return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 6558 } 6559 6560 /** 6561 * Enables or disables long click events for this view. When a view is long 6562 * clickable it reacts to the user holding down the button for a longer 6563 * duration than a tap. This event can either launch the listener or a 6564 * context menu. 6565 * 6566 * @param longClickable true to make the view long clickable, false otherwise 6567 * @see #isLongClickable() 6568 * @attr ref android.R.styleable#View_longClickable 6569 */ 6570 public void setLongClickable(boolean longClickable) { 6571 setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); 6572 } 6573 6574 /** 6575 * Sets the pressed state for this view. 6576 * 6577 * @see #isClickable() 6578 * @see #setClickable(boolean) 6579 * 6580 * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts 6581 * the View's internal state from a previously set "pressed" state. 6582 */ 6583 public void setPressed(boolean pressed) { 6584 final boolean needsRefresh = pressed != ((mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED); 6585 6586 if (pressed) { 6587 mPrivateFlags |= PFLAG_PRESSED; 6588 } else { 6589 mPrivateFlags &= ~PFLAG_PRESSED; 6590 } 6591 6592 if (needsRefresh) { 6593 refreshDrawableState(); 6594 } 6595 dispatchSetPressed(pressed); 6596 } 6597 6598 /** 6599 * Dispatch setPressed to all of this View's children. 6600 * 6601 * @see #setPressed(boolean) 6602 * 6603 * @param pressed The new pressed state 6604 */ 6605 protected void dispatchSetPressed(boolean pressed) { 6606 } 6607 6608 /** 6609 * Indicates whether the view is currently in pressed state. Unless 6610 * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter 6611 * the pressed state. 6612 * 6613 * @see #setPressed(boolean) 6614 * @see #isClickable() 6615 * @see #setClickable(boolean) 6616 * 6617 * @return true if the view is currently pressed, false otherwise 6618 */ 6619 public boolean isPressed() { 6620 return (mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED; 6621 } 6622 6623 /** 6624 * Indicates whether this view will save its state (that is, 6625 * whether its {@link #onSaveInstanceState} method will be called). 6626 * 6627 * @return Returns true if the view state saving is enabled, else false. 6628 * 6629 * @see #setSaveEnabled(boolean) 6630 * @attr ref android.R.styleable#View_saveEnabled 6631 */ 6632 public boolean isSaveEnabled() { 6633 return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; 6634 } 6635 6636 /** 6637 * Controls whether the saving of this view's state is 6638 * enabled (that is, whether its {@link #onSaveInstanceState} method 6639 * will be called). Note that even if freezing is enabled, the 6640 * view still must have an id assigned to it (via {@link #setId(int)}) 6641 * for its state to be saved. This flag can only disable the 6642 * saving of this view; any child views may still have their state saved. 6643 * 6644 * @param enabled Set to false to <em>disable</em> state saving, or true 6645 * (the default) to allow it. 6646 * 6647 * @see #isSaveEnabled() 6648 * @see #setId(int) 6649 * @see #onSaveInstanceState() 6650 * @attr ref android.R.styleable#View_saveEnabled 6651 */ 6652 public void setSaveEnabled(boolean enabled) { 6653 setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); 6654 } 6655 6656 /** 6657 * Gets whether the framework should discard touches when the view's 6658 * window is obscured by another visible window. 6659 * Refer to the {@link View} security documentation for more details. 6660 * 6661 * @return True if touch filtering is enabled. 6662 * 6663 * @see #setFilterTouchesWhenObscured(boolean) 6664 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 6665 */ 6666 @ViewDebug.ExportedProperty 6667 public boolean getFilterTouchesWhenObscured() { 6668 return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; 6669 } 6670 6671 /** 6672 * Sets whether the framework should discard touches when the view's 6673 * window is obscured by another visible window. 6674 * Refer to the {@link View} security documentation for more details. 6675 * 6676 * @param enabled True if touch filtering should be enabled. 6677 * 6678 * @see #getFilterTouchesWhenObscured 6679 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 6680 */ 6681 public void setFilterTouchesWhenObscured(boolean enabled) { 6682 setFlags(enabled ? 0 : FILTER_TOUCHES_WHEN_OBSCURED, 6683 FILTER_TOUCHES_WHEN_OBSCURED); 6684 } 6685 6686 /** 6687 * Indicates whether the entire hierarchy under this view will save its 6688 * state when a state saving traversal occurs from its parent. The default 6689 * is true; if false, these views will not be saved unless 6690 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 6691 * 6692 * @return Returns true if the view state saving from parent is enabled, else false. 6693 * 6694 * @see #setSaveFromParentEnabled(boolean) 6695 */ 6696 public boolean isSaveFromParentEnabled() { 6697 return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; 6698 } 6699 6700 /** 6701 * Controls whether the entire hierarchy under this view will save its 6702 * state when a state saving traversal occurs from its parent. The default 6703 * is true; if false, these views will not be saved unless 6704 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 6705 * 6706 * @param enabled Set to false to <em>disable</em> state saving, or true 6707 * (the default) to allow it. 6708 * 6709 * @see #isSaveFromParentEnabled() 6710 * @see #setId(int) 6711 * @see #onSaveInstanceState() 6712 */ 6713 public void setSaveFromParentEnabled(boolean enabled) { 6714 setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); 6715 } 6716 6717 6718 /** 6719 * Returns whether this View is able to take focus. 6720 * 6721 * @return True if this view can take focus, or false otherwise. 6722 * @attr ref android.R.styleable#View_focusable 6723 */ 6724 @ViewDebug.ExportedProperty(category = "focus") 6725 public final boolean isFocusable() { 6726 return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); 6727 } 6728 6729 /** 6730 * When a view is focusable, it may not want to take focus when in touch mode. 6731 * For example, a button would like focus when the user is navigating via a D-pad 6732 * so that the user can click on it, but once the user starts touching the screen, 6733 * the button shouldn't take focus 6734 * @return Whether the view is focusable in touch mode. 6735 * @attr ref android.R.styleable#View_focusableInTouchMode 6736 */ 6737 @ViewDebug.ExportedProperty 6738 public final boolean isFocusableInTouchMode() { 6739 return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); 6740 } 6741 6742 /** 6743 * Find the nearest view in the specified direction that can take focus. 6744 * This does not actually give focus to that view. 6745 * 6746 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 6747 * 6748 * @return The nearest focusable in the specified direction, or null if none 6749 * can be found. 6750 */ 6751 public View focusSearch(@FocusRealDirection int direction) { 6752 if (mParent != null) { 6753 return mParent.focusSearch(this, direction); 6754 } else { 6755 return null; 6756 } 6757 } 6758 6759 /** 6760 * This method is the last chance for the focused view and its ancestors to 6761 * respond to an arrow key. This is called when the focused view did not 6762 * consume the key internally, nor could the view system find a new view in 6763 * the requested direction to give focus to. 6764 * 6765 * @param focused The currently focused view. 6766 * @param direction The direction focus wants to move. One of FOCUS_UP, 6767 * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. 6768 * @return True if the this view consumed this unhandled move. 6769 */ 6770 public boolean dispatchUnhandledMove(View focused, @FocusRealDirection int direction) { 6771 return false; 6772 } 6773 6774 /** 6775 * If a user manually specified the next view id for a particular direction, 6776 * use the root to look up the view. 6777 * @param root The root view of the hierarchy containing this view. 6778 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, 6779 * or FOCUS_BACKWARD. 6780 * @return The user specified next view, or null if there is none. 6781 */ 6782 View findUserSetNextFocus(View root, @FocusDirection int direction) { 6783 switch (direction) { 6784 case FOCUS_LEFT: 6785 if (mNextFocusLeftId == View.NO_ID) return null; 6786 return findViewInsideOutShouldExist(root, mNextFocusLeftId); 6787 case FOCUS_RIGHT: 6788 if (mNextFocusRightId == View.NO_ID) return null; 6789 return findViewInsideOutShouldExist(root, mNextFocusRightId); 6790 case FOCUS_UP: 6791 if (mNextFocusUpId == View.NO_ID) return null; 6792 return findViewInsideOutShouldExist(root, mNextFocusUpId); 6793 case FOCUS_DOWN: 6794 if (mNextFocusDownId == View.NO_ID) return null; 6795 return findViewInsideOutShouldExist(root, mNextFocusDownId); 6796 case FOCUS_FORWARD: 6797 if (mNextFocusForwardId == View.NO_ID) return null; 6798 return findViewInsideOutShouldExist(root, mNextFocusForwardId); 6799 case FOCUS_BACKWARD: { 6800 if (mID == View.NO_ID) return null; 6801 final int id = mID; 6802 return root.findViewByPredicateInsideOut(this, new Predicate<View>() { 6803 @Override 6804 public boolean apply(View t) { 6805 return t.mNextFocusForwardId == id; 6806 } 6807 }); 6808 } 6809 } 6810 return null; 6811 } 6812 6813 private View findViewInsideOutShouldExist(View root, int id) { 6814 if (mMatchIdPredicate == null) { 6815 mMatchIdPredicate = new MatchIdPredicate(); 6816 } 6817 mMatchIdPredicate.mId = id; 6818 View result = root.findViewByPredicateInsideOut(this, mMatchIdPredicate); 6819 if (result == null) { 6820 Log.w(VIEW_LOG_TAG, "couldn't find view with id " + id); 6821 } 6822 return result; 6823 } 6824 6825 /** 6826 * Find and return all focusable views that are descendants of this view, 6827 * possibly including this view if it is focusable itself. 6828 * 6829 * @param direction The direction of the focus 6830 * @return A list of focusable views 6831 */ 6832 public ArrayList<View> getFocusables(@FocusDirection int direction) { 6833 ArrayList<View> result = new ArrayList<View>(24); 6834 addFocusables(result, direction); 6835 return result; 6836 } 6837 6838 /** 6839 * Add any focusable views that are descendants of this view (possibly 6840 * including this view if it is focusable itself) to views. If we are in touch mode, 6841 * only add views that are also focusable in touch mode. 6842 * 6843 * @param views Focusable views found so far 6844 * @param direction The direction of the focus 6845 */ 6846 public void addFocusables(ArrayList<View> views, @FocusDirection int direction) { 6847 addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); 6848 } 6849 6850 /** 6851 * Adds any focusable views that are descendants of this view (possibly 6852 * including this view if it is focusable itself) to views. This method 6853 * adds all focusable views regardless if we are in touch mode or 6854 * only views focusable in touch mode if we are in touch mode or 6855 * only views that can take accessibility focus if accessibility is enabeld 6856 * depending on the focusable mode paramater. 6857 * 6858 * @param views Focusable views found so far or null if all we are interested is 6859 * the number of focusables. 6860 * @param direction The direction of the focus. 6861 * @param focusableMode The type of focusables to be added. 6862 * 6863 * @see #FOCUSABLES_ALL 6864 * @see #FOCUSABLES_TOUCH_MODE 6865 */ 6866 public void addFocusables(ArrayList<View> views, @FocusDirection int direction, 6867 @FocusableMode int focusableMode) { 6868 if (views == null) { 6869 return; 6870 } 6871 if (!isFocusable()) { 6872 return; 6873 } 6874 if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE 6875 && isInTouchMode() && !isFocusableInTouchMode()) { 6876 return; 6877 } 6878 views.add(this); 6879 } 6880 6881 /** 6882 * Finds the Views that contain given text. The containment is case insensitive. 6883 * The search is performed by either the text that the View renders or the content 6884 * description that describes the view for accessibility purposes and the view does 6885 * not render or both. Clients can specify how the search is to be performed via 6886 * passing the {@link #FIND_VIEWS_WITH_TEXT} and 6887 * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. 6888 * 6889 * @param outViews The output list of matching Views. 6890 * @param searched The text to match against. 6891 * 6892 * @see #FIND_VIEWS_WITH_TEXT 6893 * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION 6894 * @see #setContentDescription(CharSequence) 6895 */ 6896 public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, 6897 @FindViewFlags int flags) { 6898 if (getAccessibilityNodeProvider() != null) { 6899 if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { 6900 outViews.add(this); 6901 } 6902 } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 6903 && (searched != null && searched.length() > 0) 6904 && (mContentDescription != null && mContentDescription.length() > 0)) { 6905 String searchedLowerCase = searched.toString().toLowerCase(); 6906 String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); 6907 if (contentDescriptionLowerCase.contains(searchedLowerCase)) { 6908 outViews.add(this); 6909 } 6910 } 6911 } 6912 6913 /** 6914 * Find and return all touchable views that are descendants of this view, 6915 * possibly including this view if it is touchable itself. 6916 * 6917 * @return A list of touchable views 6918 */ 6919 public ArrayList<View> getTouchables() { 6920 ArrayList<View> result = new ArrayList<View>(); 6921 addTouchables(result); 6922 return result; 6923 } 6924 6925 /** 6926 * Add any touchable views that are descendants of this view (possibly 6927 * including this view if it is touchable itself) to views. 6928 * 6929 * @param views Touchable views found so far 6930 */ 6931 public void addTouchables(ArrayList<View> views) { 6932 final int viewFlags = mViewFlags; 6933 6934 if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) 6935 && (viewFlags & ENABLED_MASK) == ENABLED) { 6936 views.add(this); 6937 } 6938 } 6939 6940 /** 6941 * Returns whether this View is accessibility focused. 6942 * 6943 * @return True if this View is accessibility focused. 6944 * @hide 6945 */ 6946 public boolean isAccessibilityFocused() { 6947 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0; 6948 } 6949 6950 /** 6951 * Call this to try to give accessibility focus to this view. 6952 * 6953 * A view will not actually take focus if {@link AccessibilityManager#isEnabled()} 6954 * returns false or the view is no visible or the view already has accessibility 6955 * focus. 6956 * 6957 * See also {@link #focusSearch(int)}, which is what you call to say that you 6958 * have focus, and you want your parent to look for the next one. 6959 * 6960 * @return Whether this view actually took accessibility focus. 6961 * 6962 * @hide 6963 */ 6964 public boolean requestAccessibilityFocus() { 6965 AccessibilityManager manager = AccessibilityManager.getInstance(mContext); 6966 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 6967 return false; 6968 } 6969 if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { 6970 return false; 6971 } 6972 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) == 0) { 6973 mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_FOCUSED; 6974 ViewRootImpl viewRootImpl = getViewRootImpl(); 6975 if (viewRootImpl != null) { 6976 viewRootImpl.setAccessibilityFocus(this, null); 6977 } 6978 invalidate(); 6979 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 6980 return true; 6981 } 6982 return false; 6983 } 6984 6985 /** 6986 * Call this to try to clear accessibility focus of this view. 6987 * 6988 * See also {@link #focusSearch(int)}, which is what you call to say that you 6989 * have focus, and you want your parent to look for the next one. 6990 * 6991 * @hide 6992 */ 6993 public void clearAccessibilityFocus() { 6994 clearAccessibilityFocusNoCallbacks(); 6995 // Clear the global reference of accessibility focus if this 6996 // view or any of its descendants had accessibility focus. 6997 ViewRootImpl viewRootImpl = getViewRootImpl(); 6998 if (viewRootImpl != null) { 6999 View focusHost = viewRootImpl.getAccessibilityFocusedHost(); 7000 if (focusHost != null && ViewRootImpl.isViewDescendantOf(focusHost, this)) { 7001 viewRootImpl.setAccessibilityFocus(null, null); 7002 } 7003 } 7004 } 7005 7006 private void sendAccessibilityHoverEvent(int eventType) { 7007 // Since we are not delivering to a client accessibility events from not 7008 // important views (unless the clinet request that) we need to fire the 7009 // event from the deepest view exposed to the client. As a consequence if 7010 // the user crosses a not exposed view the client will see enter and exit 7011 // of the exposed predecessor followed by and enter and exit of that same 7012 // predecessor when entering and exiting the not exposed descendant. This 7013 // is fine since the client has a clear idea which view is hovered at the 7014 // price of a couple more events being sent. This is a simple and 7015 // working solution. 7016 View source = this; 7017 while (true) { 7018 if (source.includeForAccessibility()) { 7019 source.sendAccessibilityEvent(eventType); 7020 return; 7021 } 7022 ViewParent parent = source.getParent(); 7023 if (parent instanceof View) { 7024 source = (View) parent; 7025 } else { 7026 return; 7027 } 7028 } 7029 } 7030 7031 /** 7032 * Clears accessibility focus without calling any callback methods 7033 * normally invoked in {@link #clearAccessibilityFocus()}. This method 7034 * is used for clearing accessibility focus when giving this focus to 7035 * another view. 7036 */ 7037 void clearAccessibilityFocusNoCallbacks() { 7038 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { 7039 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; 7040 invalidate(); 7041 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 7042 } 7043 } 7044 7045 /** 7046 * Call this to try to give focus to a specific view or to one of its 7047 * descendants. 7048 * 7049 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 7050 * false), or if it is focusable and it is not focusable in touch mode 7051 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 7052 * 7053 * See also {@link #focusSearch(int)}, which is what you call to say that you 7054 * have focus, and you want your parent to look for the next one. 7055 * 7056 * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments 7057 * {@link #FOCUS_DOWN} and <code>null</code>. 7058 * 7059 * @return Whether this view or one of its descendants actually took focus. 7060 */ 7061 public final boolean requestFocus() { 7062 return requestFocus(View.FOCUS_DOWN); 7063 } 7064 7065 /** 7066 * Call this to try to give focus to a specific view or to one of its 7067 * descendants and give it a hint about what direction focus is heading. 7068 * 7069 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 7070 * false), or if it is focusable and it is not focusable in touch mode 7071 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 7072 * 7073 * See also {@link #focusSearch(int)}, which is what you call to say that you 7074 * have focus, and you want your parent to look for the next one. 7075 * 7076 * This is equivalent to calling {@link #requestFocus(int, Rect)} with 7077 * <code>null</code> set for the previously focused rectangle. 7078 * 7079 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 7080 * @return Whether this view or one of its descendants actually took focus. 7081 */ 7082 public final boolean requestFocus(int direction) { 7083 return requestFocus(direction, null); 7084 } 7085 7086 /** 7087 * Call this to try to give focus to a specific view or to one of its descendants 7088 * and give it hints about the direction and a specific rectangle that the focus 7089 * is coming from. The rectangle can help give larger views a finer grained hint 7090 * about where focus is coming from, and therefore, where to show selection, or 7091 * forward focus change internally. 7092 * 7093 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 7094 * false), or if it is focusable and it is not focusable in touch mode 7095 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 7096 * 7097 * A View will not take focus if it is not visible. 7098 * 7099 * A View will not take focus if one of its parents has 7100 * {@link android.view.ViewGroup#getDescendantFocusability()} equal to 7101 * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. 7102 * 7103 * See also {@link #focusSearch(int)}, which is what you call to say that you 7104 * have focus, and you want your parent to look for the next one. 7105 * 7106 * You may wish to override this method if your custom {@link View} has an internal 7107 * {@link View} that it wishes to forward the request to. 7108 * 7109 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 7110 * @param previouslyFocusedRect The rectangle (in this View's coordinate system) 7111 * to give a finer grained hint about where focus is coming from. May be null 7112 * if there is no hint. 7113 * @return Whether this view or one of its descendants actually took focus. 7114 */ 7115 public boolean requestFocus(int direction, Rect previouslyFocusedRect) { 7116 return requestFocusNoSearch(direction, previouslyFocusedRect); 7117 } 7118 7119 private boolean requestFocusNoSearch(int direction, Rect previouslyFocusedRect) { 7120 // need to be focusable 7121 if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || 7122 (mViewFlags & VISIBILITY_MASK) != VISIBLE) { 7123 return false; 7124 } 7125 7126 // need to be focusable in touch mode if in touch mode 7127 if (isInTouchMode() && 7128 (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { 7129 return false; 7130 } 7131 7132 // need to not have any parents blocking us 7133 if (hasAncestorThatBlocksDescendantFocus()) { 7134 return false; 7135 } 7136 7137 handleFocusGainInternal(direction, previouslyFocusedRect); 7138 return true; 7139 } 7140 7141 /** 7142 * Call this to try to give focus to a specific view or to one of its descendants. This is a 7143 * special variant of {@link #requestFocus() } that will allow views that are not focuable in 7144 * touch mode to request focus when they are touched. 7145 * 7146 * @return Whether this view or one of its descendants actually took focus. 7147 * 7148 * @see #isInTouchMode() 7149 * 7150 */ 7151 public final boolean requestFocusFromTouch() { 7152 // Leave touch mode if we need to 7153 if (isInTouchMode()) { 7154 ViewRootImpl viewRoot = getViewRootImpl(); 7155 if (viewRoot != null) { 7156 viewRoot.ensureTouchMode(false); 7157 } 7158 } 7159 return requestFocus(View.FOCUS_DOWN); 7160 } 7161 7162 /** 7163 * @return Whether any ancestor of this view blocks descendant focus. 7164 */ 7165 private boolean hasAncestorThatBlocksDescendantFocus() { 7166 ViewParent ancestor = mParent; 7167 while (ancestor instanceof ViewGroup) { 7168 final ViewGroup vgAncestor = (ViewGroup) ancestor; 7169 if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS) { 7170 return true; 7171 } else { 7172 ancestor = vgAncestor.getParent(); 7173 } 7174 } 7175 return false; 7176 } 7177 7178 /** 7179 * Gets the mode for determining whether this View is important for accessibility 7180 * which is if it fires accessibility events and if it is reported to 7181 * accessibility services that query the screen. 7182 * 7183 * @return The mode for determining whether a View is important for accessibility. 7184 * 7185 * @attr ref android.R.styleable#View_importantForAccessibility 7186 * 7187 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 7188 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 7189 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 7190 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 7191 */ 7192 @ViewDebug.ExportedProperty(category = "accessibility", mapping = { 7193 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"), 7194 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"), 7195 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no"), 7196 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, 7197 to = "noHideDescendants") 7198 }) 7199 public int getImportantForAccessibility() { 7200 return (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 7201 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 7202 } 7203 7204 /** 7205 * Sets the live region mode for this view. This indicates to accessibility 7206 * services whether they should automatically notify the user about changes 7207 * to the view's content description or text, or to the content descriptions 7208 * or text of the view's children (where applicable). 7209 * <p> 7210 * For example, in a login screen with a TextView that displays an "incorrect 7211 * password" notification, that view should be marked as a live region with 7212 * mode {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 7213 * <p> 7214 * To disable change notifications for this view, use 7215 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. This is the default live region 7216 * mode for most views. 7217 * <p> 7218 * To indicate that the user should be notified of changes, use 7219 * {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 7220 * <p> 7221 * If the view's changes should interrupt ongoing speech and notify the user 7222 * immediately, use {@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE}. 7223 * 7224 * @param mode The live region mode for this view, one of: 7225 * <ul> 7226 * <li>{@link #ACCESSIBILITY_LIVE_REGION_NONE} 7227 * <li>{@link #ACCESSIBILITY_LIVE_REGION_POLITE} 7228 * <li>{@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE} 7229 * </ul> 7230 * @attr ref android.R.styleable#View_accessibilityLiveRegion 7231 */ 7232 public void setAccessibilityLiveRegion(int mode) { 7233 if (mode != getAccessibilityLiveRegion()) { 7234 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 7235 mPrivateFlags2 |= (mode << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT) 7236 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 7237 notifyViewAccessibilityStateChangedIfNeeded( 7238 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 7239 } 7240 } 7241 7242 /** 7243 * Gets the live region mode for this View. 7244 * 7245 * @return The live region mode for the view. 7246 * 7247 * @attr ref android.R.styleable#View_accessibilityLiveRegion 7248 * 7249 * @see #setAccessibilityLiveRegion(int) 7250 */ 7251 public int getAccessibilityLiveRegion() { 7252 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK) 7253 >> PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 7254 } 7255 7256 /** 7257 * Sets how to determine whether this view is important for accessibility 7258 * which is if it fires accessibility events and if it is reported to 7259 * accessibility services that query the screen. 7260 * 7261 * @param mode How to determine whether this view is important for accessibility. 7262 * 7263 * @attr ref android.R.styleable#View_importantForAccessibility 7264 * 7265 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 7266 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 7267 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 7268 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 7269 */ 7270 public void setImportantForAccessibility(int mode) { 7271 final int oldMode = getImportantForAccessibility(); 7272 if (mode != oldMode) { 7273 // If we're moving between AUTO and another state, we might not need 7274 // to send a subtree changed notification. We'll store the computed 7275 // importance, since we'll need to check it later to make sure. 7276 final boolean maySkipNotify = oldMode == IMPORTANT_FOR_ACCESSIBILITY_AUTO 7277 || mode == IMPORTANT_FOR_ACCESSIBILITY_AUTO; 7278 final boolean oldIncludeForAccessibility = maySkipNotify && includeForAccessibility(); 7279 mPrivateFlags2 &= ~PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 7280 mPrivateFlags2 |= (mode << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT) 7281 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 7282 if (!maySkipNotify || oldIncludeForAccessibility != includeForAccessibility()) { 7283 notifySubtreeAccessibilityStateChangedIfNeeded(); 7284 } else { 7285 notifyViewAccessibilityStateChangedIfNeeded( 7286 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 7287 } 7288 } 7289 } 7290 7291 /** 7292 * Gets whether this view should be exposed for accessibility. 7293 * 7294 * @return Whether the view is exposed for accessibility. 7295 * 7296 * @hide 7297 */ 7298 public boolean isImportantForAccessibility() { 7299 final int mode = (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 7300 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 7301 if (mode == IMPORTANT_FOR_ACCESSIBILITY_NO 7302 || mode == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 7303 return false; 7304 } 7305 7306 // Check parent mode to ensure we're not hidden. 7307 ViewParent parent = mParent; 7308 while (parent instanceof View) { 7309 if (((View) parent).getImportantForAccessibility() 7310 == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 7311 return false; 7312 } 7313 parent = parent.getParent(); 7314 } 7315 7316 return mode == IMPORTANT_FOR_ACCESSIBILITY_YES || isActionableForAccessibility() 7317 || hasListenersForAccessibility() || getAccessibilityNodeProvider() != null 7318 || getAccessibilityLiveRegion() != ACCESSIBILITY_LIVE_REGION_NONE; 7319 } 7320 7321 /** 7322 * Gets the parent for accessibility purposes. Note that the parent for 7323 * accessibility is not necessary the immediate parent. It is the first 7324 * predecessor that is important for accessibility. 7325 * 7326 * @return The parent for accessibility purposes. 7327 */ 7328 public ViewParent getParentForAccessibility() { 7329 if (mParent instanceof View) { 7330 View parentView = (View) mParent; 7331 if (parentView.includeForAccessibility()) { 7332 return mParent; 7333 } else { 7334 return mParent.getParentForAccessibility(); 7335 } 7336 } 7337 return null; 7338 } 7339 7340 /** 7341 * Adds the children of a given View for accessibility. Since some Views are 7342 * not important for accessibility the children for accessibility are not 7343 * necessarily direct children of the view, rather they are the first level of 7344 * descendants important for accessibility. 7345 * 7346 * @param children The list of children for accessibility. 7347 */ 7348 public void addChildrenForAccessibility(ArrayList<View> children) { 7349 if (includeForAccessibility()) { 7350 children.add(this); 7351 } 7352 } 7353 7354 /** 7355 * Whether to regard this view for accessibility. A view is regarded for 7356 * accessibility if it is important for accessibility or the querying 7357 * accessibility service has explicitly requested that view not 7358 * important for accessibility are regarded. 7359 * 7360 * @return Whether to regard the view for accessibility. 7361 * 7362 * @hide 7363 */ 7364 public boolean includeForAccessibility() { 7365 //noinspection SimplifiableIfStatement 7366 if (mAttachInfo != null) { 7367 return (mAttachInfo.mAccessibilityFetchFlags 7368 & AccessibilityNodeInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0 7369 || isImportantForAccessibility(); 7370 } 7371 return false; 7372 } 7373 7374 /** 7375 * Returns whether the View is considered actionable from 7376 * accessibility perspective. Such view are important for 7377 * accessibility. 7378 * 7379 * @return True if the view is actionable for accessibility. 7380 * 7381 * @hide 7382 */ 7383 public boolean isActionableForAccessibility() { 7384 return (isClickable() || isLongClickable() || isFocusable()); 7385 } 7386 7387 /** 7388 * Returns whether the View has registered callbacks which makes it 7389 * important for accessibility. 7390 * 7391 * @return True if the view is actionable for accessibility. 7392 */ 7393 private boolean hasListenersForAccessibility() { 7394 ListenerInfo info = getListenerInfo(); 7395 return mTouchDelegate != null || info.mOnKeyListener != null 7396 || info.mOnTouchListener != null || info.mOnGenericMotionListener != null 7397 || info.mOnHoverListener != null || info.mOnDragListener != null; 7398 } 7399 7400 /** 7401 * Notifies that the accessibility state of this view changed. The change 7402 * is local to this view and does not represent structural changes such 7403 * as children and parent. For example, the view became focusable. The 7404 * notification is at at most once every 7405 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 7406 * to avoid unnecessary load to the system. Also once a view has a pending 7407 * notification this method is a NOP until the notification has been sent. 7408 * 7409 * @hide 7410 */ 7411 public void notifyViewAccessibilityStateChangedIfNeeded(int changeType) { 7412 if (!AccessibilityManager.getInstance(mContext).isEnabled()) { 7413 return; 7414 } 7415 if (mSendViewStateChangedAccessibilityEvent == null) { 7416 mSendViewStateChangedAccessibilityEvent = 7417 new SendViewStateChangedAccessibilityEvent(); 7418 } 7419 mSendViewStateChangedAccessibilityEvent.runOrPost(changeType); 7420 } 7421 7422 /** 7423 * Notifies that the accessibility state of this view changed. The change 7424 * is *not* local to this view and does represent structural changes such 7425 * as children and parent. For example, the view size changed. The 7426 * notification is at at most once every 7427 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 7428 * to avoid unnecessary load to the system. Also once a view has a pending 7429 * notifucation this method is a NOP until the notification has been sent. 7430 * 7431 * @hide 7432 */ 7433 public void notifySubtreeAccessibilityStateChangedIfNeeded() { 7434 if (!AccessibilityManager.getInstance(mContext).isEnabled()) { 7435 return; 7436 } 7437 if ((mPrivateFlags2 & PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED) == 0) { 7438 mPrivateFlags2 |= PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 7439 if (mParent != null) { 7440 try { 7441 mParent.notifySubtreeAccessibilityStateChanged( 7442 this, this, AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); 7443 } catch (AbstractMethodError e) { 7444 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 7445 " does not fully implement ViewParent", e); 7446 } 7447 } 7448 } 7449 } 7450 7451 /** 7452 * Reset the flag indicating the accessibility state of the subtree rooted 7453 * at this view changed. 7454 */ 7455 void resetSubtreeAccessibilityStateChanged() { 7456 mPrivateFlags2 &= ~PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 7457 } 7458 7459 /** 7460 * Performs the specified accessibility action on the view. For 7461 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 7462 * <p> 7463 * If an {@link AccessibilityDelegate} has been specified via calling 7464 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 7465 * {@link AccessibilityDelegate#performAccessibilityAction(View, int, Bundle)} 7466 * is responsible for handling this call. 7467 * </p> 7468 * 7469 * @param action The action to perform. 7470 * @param arguments Optional action arguments. 7471 * @return Whether the action was performed. 7472 */ 7473 public boolean performAccessibilityAction(int action, Bundle arguments) { 7474 if (mAccessibilityDelegate != null) { 7475 return mAccessibilityDelegate.performAccessibilityAction(this, action, arguments); 7476 } else { 7477 return performAccessibilityActionInternal(action, arguments); 7478 } 7479 } 7480 7481 /** 7482 * @see #performAccessibilityAction(int, Bundle) 7483 * 7484 * Note: Called from the default {@link AccessibilityDelegate}. 7485 */ 7486 boolean performAccessibilityActionInternal(int action, Bundle arguments) { 7487 switch (action) { 7488 case AccessibilityNodeInfo.ACTION_CLICK: { 7489 if (isClickable()) { 7490 performClick(); 7491 return true; 7492 } 7493 } break; 7494 case AccessibilityNodeInfo.ACTION_LONG_CLICK: { 7495 if (isLongClickable()) { 7496 performLongClick(); 7497 return true; 7498 } 7499 } break; 7500 case AccessibilityNodeInfo.ACTION_FOCUS: { 7501 if (!hasFocus()) { 7502 // Get out of touch mode since accessibility 7503 // wants to move focus around. 7504 getViewRootImpl().ensureTouchMode(false); 7505 return requestFocus(); 7506 } 7507 } break; 7508 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 7509 if (hasFocus()) { 7510 clearFocus(); 7511 return !isFocused(); 7512 } 7513 } break; 7514 case AccessibilityNodeInfo.ACTION_SELECT: { 7515 if (!isSelected()) { 7516 setSelected(true); 7517 return isSelected(); 7518 } 7519 } break; 7520 case AccessibilityNodeInfo.ACTION_CLEAR_SELECTION: { 7521 if (isSelected()) { 7522 setSelected(false); 7523 return !isSelected(); 7524 } 7525 } break; 7526 case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: { 7527 if (!isAccessibilityFocused()) { 7528 return requestAccessibilityFocus(); 7529 } 7530 } break; 7531 case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: { 7532 if (isAccessibilityFocused()) { 7533 clearAccessibilityFocus(); 7534 return true; 7535 } 7536 } break; 7537 case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY: { 7538 if (arguments != null) { 7539 final int granularity = arguments.getInt( 7540 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 7541 final boolean extendSelection = arguments.getBoolean( 7542 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 7543 return traverseAtGranularity(granularity, true, extendSelection); 7544 } 7545 } break; 7546 case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: { 7547 if (arguments != null) { 7548 final int granularity = arguments.getInt( 7549 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 7550 final boolean extendSelection = arguments.getBoolean( 7551 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 7552 return traverseAtGranularity(granularity, false, extendSelection); 7553 } 7554 } break; 7555 case AccessibilityNodeInfo.ACTION_SET_SELECTION: { 7556 CharSequence text = getIterableTextForAccessibility(); 7557 if (text == null) { 7558 return false; 7559 } 7560 final int start = (arguments != null) ? arguments.getInt( 7561 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1; 7562 final int end = (arguments != null) ? arguments.getInt( 7563 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1; 7564 // Only cursor position can be specified (selection length == 0) 7565 if ((getAccessibilitySelectionStart() != start 7566 || getAccessibilitySelectionEnd() != end) 7567 && (start == end)) { 7568 setAccessibilitySelection(start, end); 7569 notifyViewAccessibilityStateChangedIfNeeded( 7570 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 7571 return true; 7572 } 7573 } break; 7574 } 7575 return false; 7576 } 7577 7578 private boolean traverseAtGranularity(int granularity, boolean forward, 7579 boolean extendSelection) { 7580 CharSequence text = getIterableTextForAccessibility(); 7581 if (text == null || text.length() == 0) { 7582 return false; 7583 } 7584 TextSegmentIterator iterator = getIteratorForGranularity(granularity); 7585 if (iterator == null) { 7586 return false; 7587 } 7588 int current = getAccessibilitySelectionEnd(); 7589 if (current == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 7590 current = forward ? 0 : text.length(); 7591 } 7592 final int[] range = forward ? iterator.following(current) : iterator.preceding(current); 7593 if (range == null) { 7594 return false; 7595 } 7596 final int segmentStart = range[0]; 7597 final int segmentEnd = range[1]; 7598 int selectionStart; 7599 int selectionEnd; 7600 if (extendSelection && isAccessibilitySelectionExtendable()) { 7601 selectionStart = getAccessibilitySelectionStart(); 7602 if (selectionStart == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 7603 selectionStart = forward ? segmentStart : segmentEnd; 7604 } 7605 selectionEnd = forward ? segmentEnd : segmentStart; 7606 } else { 7607 selectionStart = selectionEnd= forward ? segmentEnd : segmentStart; 7608 } 7609 setAccessibilitySelection(selectionStart, selectionEnd); 7610 final int action = forward ? AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY 7611 : AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY; 7612 sendViewTextTraversedAtGranularityEvent(action, granularity, segmentStart, segmentEnd); 7613 return true; 7614 } 7615 7616 /** 7617 * Gets the text reported for accessibility purposes. 7618 * 7619 * @return The accessibility text. 7620 * 7621 * @hide 7622 */ 7623 public CharSequence getIterableTextForAccessibility() { 7624 return getContentDescription(); 7625 } 7626 7627 /** 7628 * Gets whether accessibility selection can be extended. 7629 * 7630 * @return If selection is extensible. 7631 * 7632 * @hide 7633 */ 7634 public boolean isAccessibilitySelectionExtendable() { 7635 return false; 7636 } 7637 7638 /** 7639 * @hide 7640 */ 7641 public int getAccessibilitySelectionStart() { 7642 return mAccessibilityCursorPosition; 7643 } 7644 7645 /** 7646 * @hide 7647 */ 7648 public int getAccessibilitySelectionEnd() { 7649 return getAccessibilitySelectionStart(); 7650 } 7651 7652 /** 7653 * @hide 7654 */ 7655 public void setAccessibilitySelection(int start, int end) { 7656 if (start == end && end == mAccessibilityCursorPosition) { 7657 return; 7658 } 7659 if (start >= 0 && start == end && end <= getIterableTextForAccessibility().length()) { 7660 mAccessibilityCursorPosition = start; 7661 } else { 7662 mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 7663 } 7664 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED); 7665 } 7666 7667 private void sendViewTextTraversedAtGranularityEvent(int action, int granularity, 7668 int fromIndex, int toIndex) { 7669 if (mParent == null) { 7670 return; 7671 } 7672 AccessibilityEvent event = AccessibilityEvent.obtain( 7673 AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY); 7674 onInitializeAccessibilityEvent(event); 7675 onPopulateAccessibilityEvent(event); 7676 event.setFromIndex(fromIndex); 7677 event.setToIndex(toIndex); 7678 event.setAction(action); 7679 event.setMovementGranularity(granularity); 7680 mParent.requestSendAccessibilityEvent(this, event); 7681 } 7682 7683 /** 7684 * @hide 7685 */ 7686 public TextSegmentIterator getIteratorForGranularity(int granularity) { 7687 switch (granularity) { 7688 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER: { 7689 CharSequence text = getIterableTextForAccessibility(); 7690 if (text != null && text.length() > 0) { 7691 CharacterTextSegmentIterator iterator = 7692 CharacterTextSegmentIterator.getInstance( 7693 mContext.getResources().getConfiguration().locale); 7694 iterator.initialize(text.toString()); 7695 return iterator; 7696 } 7697 } break; 7698 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD: { 7699 CharSequence text = getIterableTextForAccessibility(); 7700 if (text != null && text.length() > 0) { 7701 WordTextSegmentIterator iterator = 7702 WordTextSegmentIterator.getInstance( 7703 mContext.getResources().getConfiguration().locale); 7704 iterator.initialize(text.toString()); 7705 return iterator; 7706 } 7707 } break; 7708 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH: { 7709 CharSequence text = getIterableTextForAccessibility(); 7710 if (text != null && text.length() > 0) { 7711 ParagraphTextSegmentIterator iterator = 7712 ParagraphTextSegmentIterator.getInstance(); 7713 iterator.initialize(text.toString()); 7714 return iterator; 7715 } 7716 } break; 7717 } 7718 return null; 7719 } 7720 7721 /** 7722 * @hide 7723 */ 7724 public void dispatchStartTemporaryDetach() { 7725 clearDisplayList(); 7726 7727 onStartTemporaryDetach(); 7728 } 7729 7730 /** 7731 * This is called when a container is going to temporarily detach a child, with 7732 * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. 7733 * It will either be followed by {@link #onFinishTemporaryDetach()} or 7734 * {@link #onDetachedFromWindow()} when the container is done. 7735 */ 7736 public void onStartTemporaryDetach() { 7737 removeUnsetPressCallback(); 7738 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 7739 } 7740 7741 /** 7742 * @hide 7743 */ 7744 public void dispatchFinishTemporaryDetach() { 7745 onFinishTemporaryDetach(); 7746 } 7747 7748 /** 7749 * Called after {@link #onStartTemporaryDetach} when the container is done 7750 * changing the view. 7751 */ 7752 public void onFinishTemporaryDetach() { 7753 } 7754 7755 /** 7756 * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} 7757 * for this view's window. Returns null if the view is not currently attached 7758 * to the window. Normally you will not need to use this directly, but 7759 * just use the standard high-level event callbacks like 7760 * {@link #onKeyDown(int, KeyEvent)}. 7761 */ 7762 public KeyEvent.DispatcherState getKeyDispatcherState() { 7763 return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; 7764 } 7765 7766 /** 7767 * Dispatch a key event before it is processed by any input method 7768 * associated with the view hierarchy. This can be used to intercept 7769 * key events in special situations before the IME consumes them; a 7770 * typical example would be handling the BACK key to update the application's 7771 * UI instead of allowing the IME to see it and close itself. 7772 * 7773 * @param event The key event to be dispatched. 7774 * @return True if the event was handled, false otherwise. 7775 */ 7776 public boolean dispatchKeyEventPreIme(KeyEvent event) { 7777 return onKeyPreIme(event.getKeyCode(), event); 7778 } 7779 7780 /** 7781 * Dispatch a key event to the next view on the focus path. This path runs 7782 * from the top of the view tree down to the currently focused view. If this 7783 * view has focus, it will dispatch to itself. Otherwise it will dispatch 7784 * the next node down the focus path. This method also fires any key 7785 * listeners. 7786 * 7787 * @param event The key event to be dispatched. 7788 * @return True if the event was handled, false otherwise. 7789 */ 7790 public boolean dispatchKeyEvent(KeyEvent event) { 7791 if (mInputEventConsistencyVerifier != null) { 7792 mInputEventConsistencyVerifier.onKeyEvent(event, 0); 7793 } 7794 7795 // Give any attached key listener a first crack at the event. 7796 //noinspection SimplifiableIfStatement 7797 ListenerInfo li = mListenerInfo; 7798 if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 7799 && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { 7800 return true; 7801 } 7802 7803 if (event.dispatch(this, mAttachInfo != null 7804 ? mAttachInfo.mKeyDispatchState : null, this)) { 7805 return true; 7806 } 7807 7808 if (mInputEventConsistencyVerifier != null) { 7809 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7810 } 7811 return false; 7812 } 7813 7814 /** 7815 * Dispatches a key shortcut event. 7816 * 7817 * @param event The key event to be dispatched. 7818 * @return True if the event was handled by the view, false otherwise. 7819 */ 7820 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 7821 return onKeyShortcut(event.getKeyCode(), event); 7822 } 7823 7824 /** 7825 * Pass the touch screen motion event down to the target view, or this 7826 * view if it is the target. 7827 * 7828 * @param event The motion event to be dispatched. 7829 * @return True if the event was handled by the view, false otherwise. 7830 */ 7831 public boolean dispatchTouchEvent(MotionEvent event) { 7832 if (mInputEventConsistencyVerifier != null) { 7833 mInputEventConsistencyVerifier.onTouchEvent(event, 0); 7834 } 7835 7836 if (onFilterTouchEventForSecurity(event)) { 7837 //noinspection SimplifiableIfStatement 7838 ListenerInfo li = mListenerInfo; 7839 if (li != null && li.mOnTouchListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 7840 && li.mOnTouchListener.onTouch(this, event)) { 7841 return true; 7842 } 7843 7844 if (onTouchEvent(event)) { 7845 return true; 7846 } 7847 } 7848 7849 if (mInputEventConsistencyVerifier != null) { 7850 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7851 } 7852 return false; 7853 } 7854 7855 /** 7856 * Filter the touch event to apply security policies. 7857 * 7858 * @param event The motion event to be filtered. 7859 * @return True if the event should be dispatched, false if the event should be dropped. 7860 * 7861 * @see #getFilterTouchesWhenObscured 7862 */ 7863 public boolean onFilterTouchEventForSecurity(MotionEvent event) { 7864 //noinspection RedundantIfStatement 7865 if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 7866 && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { 7867 // Window is obscured, drop this touch. 7868 return false; 7869 } 7870 return true; 7871 } 7872 7873 /** 7874 * Pass a trackball motion event down to the focused view. 7875 * 7876 * @param event The motion event to be dispatched. 7877 * @return True if the event was handled by the view, false otherwise. 7878 */ 7879 public boolean dispatchTrackballEvent(MotionEvent event) { 7880 if (mInputEventConsistencyVerifier != null) { 7881 mInputEventConsistencyVerifier.onTrackballEvent(event, 0); 7882 } 7883 7884 return onTrackballEvent(event); 7885 } 7886 7887 /** 7888 * Dispatch a generic motion event. 7889 * <p> 7890 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 7891 * are delivered to the view under the pointer. All other generic motion events are 7892 * delivered to the focused view. Hover events are handled specially and are delivered 7893 * to {@link #onHoverEvent(MotionEvent)}. 7894 * </p> 7895 * 7896 * @param event The motion event to be dispatched. 7897 * @return True if the event was handled by the view, false otherwise. 7898 */ 7899 public boolean dispatchGenericMotionEvent(MotionEvent event) { 7900 if (mInputEventConsistencyVerifier != null) { 7901 mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); 7902 } 7903 7904 final int source = event.getSource(); 7905 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 7906 final int action = event.getAction(); 7907 if (action == MotionEvent.ACTION_HOVER_ENTER 7908 || action == MotionEvent.ACTION_HOVER_MOVE 7909 || action == MotionEvent.ACTION_HOVER_EXIT) { 7910 if (dispatchHoverEvent(event)) { 7911 return true; 7912 } 7913 } else if (dispatchGenericPointerEvent(event)) { 7914 return true; 7915 } 7916 } else if (dispatchGenericFocusedEvent(event)) { 7917 return true; 7918 } 7919 7920 if (dispatchGenericMotionEventInternal(event)) { 7921 return true; 7922 } 7923 7924 if (mInputEventConsistencyVerifier != null) { 7925 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7926 } 7927 return false; 7928 } 7929 7930 private boolean dispatchGenericMotionEventInternal(MotionEvent event) { 7931 //noinspection SimplifiableIfStatement 7932 ListenerInfo li = mListenerInfo; 7933 if (li != null && li.mOnGenericMotionListener != null 7934 && (mViewFlags & ENABLED_MASK) == ENABLED 7935 && li.mOnGenericMotionListener.onGenericMotion(this, event)) { 7936 return true; 7937 } 7938 7939 if (onGenericMotionEvent(event)) { 7940 return true; 7941 } 7942 7943 if (mInputEventConsistencyVerifier != null) { 7944 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7945 } 7946 return false; 7947 } 7948 7949 /** 7950 * Dispatch a hover event. 7951 * <p> 7952 * Do not call this method directly. 7953 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 7954 * </p> 7955 * 7956 * @param event The motion event to be dispatched. 7957 * @return True if the event was handled by the view, false otherwise. 7958 */ 7959 protected boolean dispatchHoverEvent(MotionEvent event) { 7960 ListenerInfo li = mListenerInfo; 7961 //noinspection SimplifiableIfStatement 7962 if (li != null && li.mOnHoverListener != null 7963 && (mViewFlags & ENABLED_MASK) == ENABLED 7964 && li.mOnHoverListener.onHover(this, event)) { 7965 return true; 7966 } 7967 7968 return onHoverEvent(event); 7969 } 7970 7971 /** 7972 * Returns true if the view has a child to which it has recently sent 7973 * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and 7974 * it does not have a hovered child, then it must be the innermost hovered view. 7975 * @hide 7976 */ 7977 protected boolean hasHoveredChild() { 7978 return false; 7979 } 7980 7981 /** 7982 * Dispatch a generic motion event to the view under the first pointer. 7983 * <p> 7984 * Do not call this method directly. 7985 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 7986 * </p> 7987 * 7988 * @param event The motion event to be dispatched. 7989 * @return True if the event was handled by the view, false otherwise. 7990 */ 7991 protected boolean dispatchGenericPointerEvent(MotionEvent event) { 7992 return false; 7993 } 7994 7995 /** 7996 * Dispatch a generic motion event to the currently focused view. 7997 * <p> 7998 * Do not call this method directly. 7999 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 8000 * </p> 8001 * 8002 * @param event The motion event to be dispatched. 8003 * @return True if the event was handled by the view, false otherwise. 8004 */ 8005 protected boolean dispatchGenericFocusedEvent(MotionEvent event) { 8006 return false; 8007 } 8008 8009 /** 8010 * Dispatch a pointer event. 8011 * <p> 8012 * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all 8013 * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns 8014 * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches 8015 * and should not be expected to handle other pointing device features. 8016 * </p> 8017 * 8018 * @param event The motion event to be dispatched. 8019 * @return True if the event was handled by the view, false otherwise. 8020 * @hide 8021 */ 8022 public final boolean dispatchPointerEvent(MotionEvent event) { 8023 if (event.isTouchEvent()) { 8024 return dispatchTouchEvent(event); 8025 } else { 8026 return dispatchGenericMotionEvent(event); 8027 } 8028 } 8029 8030 /** 8031 * Called when the window containing this view gains or loses window focus. 8032 * ViewGroups should override to route to their children. 8033 * 8034 * @param hasFocus True if the window containing this view now has focus, 8035 * false otherwise. 8036 */ 8037 public void dispatchWindowFocusChanged(boolean hasFocus) { 8038 onWindowFocusChanged(hasFocus); 8039 } 8040 8041 /** 8042 * Called when the window containing this view gains or loses focus. Note 8043 * that this is separate from view focus: to receive key events, both 8044 * your view and its window must have focus. If a window is displayed 8045 * on top of yours that takes input focus, then your own window will lose 8046 * focus but the view focus will remain unchanged. 8047 * 8048 * @param hasWindowFocus True if the window containing this view now has 8049 * focus, false otherwise. 8050 */ 8051 public void onWindowFocusChanged(boolean hasWindowFocus) { 8052 InputMethodManager imm = InputMethodManager.peekInstance(); 8053 if (!hasWindowFocus) { 8054 if (isPressed()) { 8055 setPressed(false); 8056 } 8057 if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 8058 imm.focusOut(this); 8059 } 8060 removeLongPressCallback(); 8061 removeTapCallback(); 8062 onFocusLost(); 8063 } else if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 8064 imm.focusIn(this); 8065 } 8066 refreshDrawableState(); 8067 } 8068 8069 /** 8070 * Returns true if this view is in a window that currently has window focus. 8071 * Note that this is not the same as the view itself having focus. 8072 * 8073 * @return True if this view is in a window that currently has window focus. 8074 */ 8075 public boolean hasWindowFocus() { 8076 return mAttachInfo != null && mAttachInfo.mHasWindowFocus; 8077 } 8078 8079 /** 8080 * Dispatch a view visibility change down the view hierarchy. 8081 * ViewGroups should override to route to their children. 8082 * @param changedView The view whose visibility changed. Could be 'this' or 8083 * an ancestor view. 8084 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 8085 * {@link #INVISIBLE} or {@link #GONE}. 8086 */ 8087 protected void dispatchVisibilityChanged(@NonNull View changedView, 8088 @Visibility int visibility) { 8089 onVisibilityChanged(changedView, visibility); 8090 } 8091 8092 /** 8093 * Called when the visibility of the view or an ancestor of the view is changed. 8094 * @param changedView The view whose visibility changed. Could be 'this' or 8095 * an ancestor view. 8096 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 8097 * {@link #INVISIBLE} or {@link #GONE}. 8098 */ 8099 protected void onVisibilityChanged(@NonNull View changedView, @Visibility int visibility) { 8100 if (visibility == VISIBLE) { 8101 if (mAttachInfo != null) { 8102 initialAwakenScrollBars(); 8103 } else { 8104 mPrivateFlags |= PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH; 8105 } 8106 } 8107 } 8108 8109 /** 8110 * Dispatch a hint about whether this view is displayed. For instance, when 8111 * a View moves out of the screen, it might receives a display hint indicating 8112 * the view is not displayed. Applications should not <em>rely</em> on this hint 8113 * as there is no guarantee that they will receive one. 8114 * 8115 * @param hint A hint about whether or not this view is displayed: 8116 * {@link #VISIBLE} or {@link #INVISIBLE}. 8117 */ 8118 public void dispatchDisplayHint(@Visibility int hint) { 8119 onDisplayHint(hint); 8120 } 8121 8122 /** 8123 * Gives this view a hint about whether is displayed or not. For instance, when 8124 * a View moves out of the screen, it might receives a display hint indicating 8125 * the view is not displayed. Applications should not <em>rely</em> on this hint 8126 * as there is no guarantee that they will receive one. 8127 * 8128 * @param hint A hint about whether or not this view is displayed: 8129 * {@link #VISIBLE} or {@link #INVISIBLE}. 8130 */ 8131 protected void onDisplayHint(@Visibility int hint) { 8132 } 8133 8134 /** 8135 * Dispatch a window visibility change down the view hierarchy. 8136 * ViewGroups should override to route to their children. 8137 * 8138 * @param visibility The new visibility of the window. 8139 * 8140 * @see #onWindowVisibilityChanged(int) 8141 */ 8142 public void dispatchWindowVisibilityChanged(@Visibility int visibility) { 8143 onWindowVisibilityChanged(visibility); 8144 } 8145 8146 /** 8147 * Called when the window containing has change its visibility 8148 * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note 8149 * that this tells you whether or not your window is being made visible 8150 * to the window manager; this does <em>not</em> tell you whether or not 8151 * your window is obscured by other windows on the screen, even if it 8152 * is itself visible. 8153 * 8154 * @param visibility The new visibility of the window. 8155 */ 8156 protected void onWindowVisibilityChanged(@Visibility int visibility) { 8157 if (visibility == VISIBLE) { 8158 initialAwakenScrollBars(); 8159 } 8160 } 8161 8162 /** 8163 * Returns the current visibility of the window this view is attached to 8164 * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). 8165 * 8166 * @return Returns the current visibility of the view's window. 8167 */ 8168 @Visibility 8169 public int getWindowVisibility() { 8170 return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; 8171 } 8172 8173 /** 8174 * Retrieve the overall visible display size in which the window this view is 8175 * attached to has been positioned in. This takes into account screen 8176 * decorations above the window, for both cases where the window itself 8177 * is being position inside of them or the window is being placed under 8178 * then and covered insets are used for the window to position its content 8179 * inside. In effect, this tells you the available area where content can 8180 * be placed and remain visible to users. 8181 * 8182 * <p>This function requires an IPC back to the window manager to retrieve 8183 * the requested information, so should not be used in performance critical 8184 * code like drawing. 8185 * 8186 * @param outRect Filled in with the visible display frame. If the view 8187 * is not attached to a window, this is simply the raw display size. 8188 */ 8189 public void getWindowVisibleDisplayFrame(Rect outRect) { 8190 if (mAttachInfo != null) { 8191 try { 8192 mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); 8193 } catch (RemoteException e) { 8194 return; 8195 } 8196 // XXX This is really broken, and probably all needs to be done 8197 // in the window manager, and we need to know more about whether 8198 // we want the area behind or in front of the IME. 8199 final Rect insets = mAttachInfo.mVisibleInsets; 8200 outRect.left += insets.left; 8201 outRect.top += insets.top; 8202 outRect.right -= insets.right; 8203 outRect.bottom -= insets.bottom; 8204 return; 8205 } 8206 // The view is not attached to a display so we don't have a context. 8207 // Make a best guess about the display size. 8208 Display d = DisplayManagerGlobal.getInstance().getRealDisplay(Display.DEFAULT_DISPLAY); 8209 d.getRectSize(outRect); 8210 } 8211 8212 /** 8213 * Dispatch a notification about a resource configuration change down 8214 * the view hierarchy. 8215 * ViewGroups should override to route to their children. 8216 * 8217 * @param newConfig The new resource configuration. 8218 * 8219 * @see #onConfigurationChanged(android.content.res.Configuration) 8220 */ 8221 public void dispatchConfigurationChanged(Configuration newConfig) { 8222 onConfigurationChanged(newConfig); 8223 } 8224 8225 /** 8226 * Called when the current configuration of the resources being used 8227 * by the application have changed. You can use this to decide when 8228 * to reload resources that can changed based on orientation and other 8229 * configuration characterstics. You only need to use this if you are 8230 * not relying on the normal {@link android.app.Activity} mechanism of 8231 * recreating the activity instance upon a configuration change. 8232 * 8233 * @param newConfig The new resource configuration. 8234 */ 8235 protected void onConfigurationChanged(Configuration newConfig) { 8236 } 8237 8238 /** 8239 * Private function to aggregate all per-view attributes in to the view 8240 * root. 8241 */ 8242 void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) { 8243 performCollectViewAttributes(attachInfo, visibility); 8244 } 8245 8246 void performCollectViewAttributes(AttachInfo attachInfo, int visibility) { 8247 if ((visibility & VISIBILITY_MASK) == VISIBLE) { 8248 if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { 8249 attachInfo.mKeepScreenOn = true; 8250 } 8251 attachInfo.mSystemUiVisibility |= mSystemUiVisibility; 8252 ListenerInfo li = mListenerInfo; 8253 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 8254 attachInfo.mHasSystemUiListeners = true; 8255 } 8256 } 8257 } 8258 8259 void needGlobalAttributesUpdate(boolean force) { 8260 final AttachInfo ai = mAttachInfo; 8261 if (ai != null && !ai.mRecomputeGlobalAttributes) { 8262 if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) 8263 || ai.mHasSystemUiListeners) { 8264 ai.mRecomputeGlobalAttributes = true; 8265 } 8266 } 8267 } 8268 8269 /** 8270 * Returns whether the device is currently in touch mode. Touch mode is entered 8271 * once the user begins interacting with the device by touch, and affects various 8272 * things like whether focus is always visible to the user. 8273 * 8274 * @return Whether the device is in touch mode. 8275 */ 8276 @ViewDebug.ExportedProperty 8277 public boolean isInTouchMode() { 8278 if (mAttachInfo != null) { 8279 return mAttachInfo.mInTouchMode; 8280 } else { 8281 return ViewRootImpl.isInTouchMode(); 8282 } 8283 } 8284 8285 /** 8286 * Returns the context the view is running in, through which it can 8287 * access the current theme, resources, etc. 8288 * 8289 * @return The view's Context. 8290 */ 8291 @ViewDebug.CapturedViewProperty 8292 public final Context getContext() { 8293 return mContext; 8294 } 8295 8296 /** 8297 * Handle a key event before it is processed by any input method 8298 * associated with the view hierarchy. This can be used to intercept 8299 * key events in special situations before the IME consumes them; a 8300 * typical example would be handling the BACK key to update the application's 8301 * UI instead of allowing the IME to see it and close itself. 8302 * 8303 * @param keyCode The value in event.getKeyCode(). 8304 * @param event Description of the key event. 8305 * @return If you handled the event, return true. If you want to allow the 8306 * event to be handled by the next receiver, return false. 8307 */ 8308 public boolean onKeyPreIme(int keyCode, KeyEvent event) { 8309 return false; 8310 } 8311 8312 /** 8313 * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) 8314 * KeyEvent.Callback.onKeyDown()}: perform press of the view 8315 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} 8316 * is released, if the view is enabled and clickable. 8317 * 8318 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8319 * although some may elect to do so in some situations. Do not rely on this to 8320 * catch software key presses. 8321 * 8322 * @param keyCode A key code that represents the button pressed, from 8323 * {@link android.view.KeyEvent}. 8324 * @param event The KeyEvent object that defines the button action. 8325 */ 8326 public boolean onKeyDown(int keyCode, KeyEvent event) { 8327 boolean result = false; 8328 8329 if (KeyEvent.isConfirmKey(keyCode)) { 8330 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 8331 return true; 8332 } 8333 // Long clickable items don't necessarily have to be clickable 8334 if (((mViewFlags & CLICKABLE) == CLICKABLE || 8335 (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && 8336 (event.getRepeatCount() == 0)) { 8337 setPressed(true); 8338 checkForLongClick(0); 8339 return true; 8340 } 8341 } 8342 return result; 8343 } 8344 8345 /** 8346 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 8347 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 8348 * the event). 8349 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8350 * although some may elect to do so in some situations. Do not rely on this to 8351 * catch software key presses. 8352 */ 8353 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 8354 return false; 8355 } 8356 8357 /** 8358 * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) 8359 * KeyEvent.Callback.onKeyUp()}: perform clicking of the view 8360 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or 8361 * {@link KeyEvent#KEYCODE_ENTER} is released. 8362 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8363 * although some may elect to do so in some situations. Do not rely on this to 8364 * catch software key presses. 8365 * 8366 * @param keyCode A key code that represents the button pressed, from 8367 * {@link android.view.KeyEvent}. 8368 * @param event The KeyEvent object that defines the button action. 8369 */ 8370 public boolean onKeyUp(int keyCode, KeyEvent event) { 8371 if (KeyEvent.isConfirmKey(keyCode)) { 8372 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 8373 return true; 8374 } 8375 if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { 8376 setPressed(false); 8377 8378 if (!mHasPerformedLongPress) { 8379 // This is a tap, so remove the longpress check 8380 removeLongPressCallback(); 8381 return performClick(); 8382 } 8383 } 8384 } 8385 return false; 8386 } 8387 8388 /** 8389 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 8390 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 8391 * the event). 8392 * <p>Key presses in software keyboards will generally NOT trigger this listener, 8393 * although some may elect to do so in some situations. Do not rely on this to 8394 * catch software key presses. 8395 * 8396 * @param keyCode A key code that represents the button pressed, from 8397 * {@link android.view.KeyEvent}. 8398 * @param repeatCount The number of times the action was made. 8399 * @param event The KeyEvent object that defines the button action. 8400 */ 8401 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 8402 return false; 8403 } 8404 8405 /** 8406 * Called on the focused view when a key shortcut event is not handled. 8407 * Override this method to implement local key shortcuts for the View. 8408 * Key shortcuts can also be implemented by setting the 8409 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 8410 * 8411 * @param keyCode The value in event.getKeyCode(). 8412 * @param event Description of the key event. 8413 * @return If you handled the event, return true. If you want to allow the 8414 * event to be handled by the next receiver, return false. 8415 */ 8416 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 8417 return false; 8418 } 8419 8420 /** 8421 * Check whether the called view is a text editor, in which case it 8422 * would make sense to automatically display a soft input window for 8423 * it. Subclasses should override this if they implement 8424 * {@link #onCreateInputConnection(EditorInfo)} to return true if 8425 * a call on that method would return a non-null InputConnection, and 8426 * they are really a first-class editor that the user would normally 8427 * start typing on when the go into a window containing your view. 8428 * 8429 * <p>The default implementation always returns false. This does 8430 * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} 8431 * will not be called or the user can not otherwise perform edits on your 8432 * view; it is just a hint to the system that this is not the primary 8433 * purpose of this view. 8434 * 8435 * @return Returns true if this view is a text editor, else false. 8436 */ 8437 public boolean onCheckIsTextEditor() { 8438 return false; 8439 } 8440 8441 /** 8442 * Create a new InputConnection for an InputMethod to interact 8443 * with the view. The default implementation returns null, since it doesn't 8444 * support input methods. You can override this to implement such support. 8445 * This is only needed for views that take focus and text input. 8446 * 8447 * <p>When implementing this, you probably also want to implement 8448 * {@link #onCheckIsTextEditor()} to indicate you will return a 8449 * non-null InputConnection. 8450 * 8451 * @param outAttrs Fill in with attribute information about the connection. 8452 */ 8453 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { 8454 return null; 8455 } 8456 8457 /** 8458 * Called by the {@link android.view.inputmethod.InputMethodManager} 8459 * when a view who is not the current 8460 * input connection target is trying to make a call on the manager. The 8461 * default implementation returns false; you can override this to return 8462 * true for certain views if you are performing InputConnection proxying 8463 * to them. 8464 * @param view The View that is making the InputMethodManager call. 8465 * @return Return true to allow the call, false to reject. 8466 */ 8467 public boolean checkInputConnectionProxy(View view) { 8468 return false; 8469 } 8470 8471 /** 8472 * Show the context menu for this view. It is not safe to hold on to the 8473 * menu after returning from this method. 8474 * 8475 * You should normally not overload this method. Overload 8476 * {@link #onCreateContextMenu(ContextMenu)} or define an 8477 * {@link OnCreateContextMenuListener} to add items to the context menu. 8478 * 8479 * @param menu The context menu to populate 8480 */ 8481 public void createContextMenu(ContextMenu menu) { 8482 ContextMenuInfo menuInfo = getContextMenuInfo(); 8483 8484 // Sets the current menu info so all items added to menu will have 8485 // my extra info set. 8486 ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); 8487 8488 onCreateContextMenu(menu); 8489 ListenerInfo li = mListenerInfo; 8490 if (li != null && li.mOnCreateContextMenuListener != null) { 8491 li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); 8492 } 8493 8494 // Clear the extra information so subsequent items that aren't mine don't 8495 // have my extra info. 8496 ((MenuBuilder)menu).setCurrentMenuInfo(null); 8497 8498 if (mParent != null) { 8499 mParent.createContextMenu(menu); 8500 } 8501 } 8502 8503 /** 8504 * Views should implement this if they have extra information to associate 8505 * with the context menu. The return result is supplied as a parameter to 8506 * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} 8507 * callback. 8508 * 8509 * @return Extra information about the item for which the context menu 8510 * should be shown. This information will vary across different 8511 * subclasses of View. 8512 */ 8513 protected ContextMenuInfo getContextMenuInfo() { 8514 return null; 8515 } 8516 8517 /** 8518 * Views should implement this if the view itself is going to add items to 8519 * the context menu. 8520 * 8521 * @param menu the context menu to populate 8522 */ 8523 protected void onCreateContextMenu(ContextMenu menu) { 8524 } 8525 8526 /** 8527 * Implement this method to handle trackball motion events. The 8528 * <em>relative</em> movement of the trackball since the last event 8529 * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and 8530 * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so 8531 * that a movement of 1 corresponds to the user pressing one DPAD key (so 8532 * they will often be fractional values, representing the more fine-grained 8533 * movement information available from a trackball). 8534 * 8535 * @param event The motion event. 8536 * @return True if the event was handled, false otherwise. 8537 */ 8538 public boolean onTrackballEvent(MotionEvent event) { 8539 return false; 8540 } 8541 8542 /** 8543 * Implement this method to handle generic motion events. 8544 * <p> 8545 * Generic motion events describe joystick movements, mouse hovers, track pad 8546 * touches, scroll wheel movements and other input events. The 8547 * {@link MotionEvent#getSource() source} of the motion event specifies 8548 * the class of input that was received. Implementations of this method 8549 * must examine the bits in the source before processing the event. 8550 * The following code example shows how this is done. 8551 * </p><p> 8552 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 8553 * are delivered to the view under the pointer. All other generic motion events are 8554 * delivered to the focused view. 8555 * </p> 8556 * <pre> public boolean onGenericMotionEvent(MotionEvent event) { 8557 * if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) { 8558 * if (event.getAction() == MotionEvent.ACTION_MOVE) { 8559 * // process the joystick movement... 8560 * return true; 8561 * } 8562 * } 8563 * if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) { 8564 * switch (event.getAction()) { 8565 * case MotionEvent.ACTION_HOVER_MOVE: 8566 * // process the mouse hover movement... 8567 * return true; 8568 * case MotionEvent.ACTION_SCROLL: 8569 * // process the scroll wheel movement... 8570 * return true; 8571 * } 8572 * } 8573 * return super.onGenericMotionEvent(event); 8574 * }</pre> 8575 * 8576 * @param event The generic motion event being processed. 8577 * @return True if the event was handled, false otherwise. 8578 */ 8579 public boolean onGenericMotionEvent(MotionEvent event) { 8580 return false; 8581 } 8582 8583 /** 8584 * Implement this method to handle hover events. 8585 * <p> 8586 * This method is called whenever a pointer is hovering into, over, or out of the 8587 * bounds of a view and the view is not currently being touched. 8588 * Hover events are represented as pointer events with action 8589 * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, 8590 * or {@link MotionEvent#ACTION_HOVER_EXIT}. 8591 * </p> 8592 * <ul> 8593 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} 8594 * when the pointer enters the bounds of the view.</li> 8595 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} 8596 * when the pointer has already entered the bounds of the view and has moved.</li> 8597 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} 8598 * when the pointer has exited the bounds of the view or when the pointer is 8599 * about to go down due to a button click, tap, or similar user action that 8600 * causes the view to be touched.</li> 8601 * </ul> 8602 * <p> 8603 * The view should implement this method to return true to indicate that it is 8604 * handling the hover event, such as by changing its drawable state. 8605 * </p><p> 8606 * The default implementation calls {@link #setHovered} to update the hovered state 8607 * of the view when a hover enter or hover exit event is received, if the view 8608 * is enabled and is clickable. The default implementation also sends hover 8609 * accessibility events. 8610 * </p> 8611 * 8612 * @param event The motion event that describes the hover. 8613 * @return True if the view handled the hover event. 8614 * 8615 * @see #isHovered 8616 * @see #setHovered 8617 * @see #onHoverChanged 8618 */ 8619 public boolean onHoverEvent(MotionEvent event) { 8620 // The root view may receive hover (or touch) events that are outside the bounds of 8621 // the window. This code ensures that we only send accessibility events for 8622 // hovers that are actually within the bounds of the root view. 8623 final int action = event.getActionMasked(); 8624 if (!mSendingHoverAccessibilityEvents) { 8625 if ((action == MotionEvent.ACTION_HOVER_ENTER 8626 || action == MotionEvent.ACTION_HOVER_MOVE) 8627 && !hasHoveredChild() 8628 && pointInView(event.getX(), event.getY())) { 8629 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 8630 mSendingHoverAccessibilityEvents = true; 8631 } 8632 } else { 8633 if (action == MotionEvent.ACTION_HOVER_EXIT 8634 || (action == MotionEvent.ACTION_MOVE 8635 && !pointInView(event.getX(), event.getY()))) { 8636 mSendingHoverAccessibilityEvents = false; 8637 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 8638 // If the window does not have input focus we take away accessibility 8639 // focus as soon as the user stop hovering over the view. 8640 if (mAttachInfo != null && !mAttachInfo.mHasWindowFocus) { 8641 getViewRootImpl().setAccessibilityFocus(null, null); 8642 } 8643 } 8644 } 8645 8646 if (isHoverable()) { 8647 switch (action) { 8648 case MotionEvent.ACTION_HOVER_ENTER: 8649 setHovered(true); 8650 break; 8651 case MotionEvent.ACTION_HOVER_EXIT: 8652 setHovered(false); 8653 break; 8654 } 8655 8656 // Dispatch the event to onGenericMotionEvent before returning true. 8657 // This is to provide compatibility with existing applications that 8658 // handled HOVER_MOVE events in onGenericMotionEvent and that would 8659 // break because of the new default handling for hoverable views 8660 // in onHoverEvent. 8661 // Note that onGenericMotionEvent will be called by default when 8662 // onHoverEvent returns false (refer to dispatchGenericMotionEvent). 8663 dispatchGenericMotionEventInternal(event); 8664 // The event was already handled by calling setHovered(), so always 8665 // return true. 8666 return true; 8667 } 8668 8669 return false; 8670 } 8671 8672 /** 8673 * Returns true if the view should handle {@link #onHoverEvent} 8674 * by calling {@link #setHovered} to change its hovered state. 8675 * 8676 * @return True if the view is hoverable. 8677 */ 8678 private boolean isHoverable() { 8679 final int viewFlags = mViewFlags; 8680 if ((viewFlags & ENABLED_MASK) == DISABLED) { 8681 return false; 8682 } 8683 8684 return (viewFlags & CLICKABLE) == CLICKABLE 8685 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 8686 } 8687 8688 /** 8689 * Returns true if the view is currently hovered. 8690 * 8691 * @return True if the view is currently hovered. 8692 * 8693 * @see #setHovered 8694 * @see #onHoverChanged 8695 */ 8696 @ViewDebug.ExportedProperty 8697 public boolean isHovered() { 8698 return (mPrivateFlags & PFLAG_HOVERED) != 0; 8699 } 8700 8701 /** 8702 * Sets whether the view is currently hovered. 8703 * <p> 8704 * Calling this method also changes the drawable state of the view. This 8705 * enables the view to react to hover by using different drawable resources 8706 * to change its appearance. 8707 * </p><p> 8708 * The {@link #onHoverChanged} method is called when the hovered state changes. 8709 * </p> 8710 * 8711 * @param hovered True if the view is hovered. 8712 * 8713 * @see #isHovered 8714 * @see #onHoverChanged 8715 */ 8716 public void setHovered(boolean hovered) { 8717 if (hovered) { 8718 if ((mPrivateFlags & PFLAG_HOVERED) == 0) { 8719 mPrivateFlags |= PFLAG_HOVERED; 8720 refreshDrawableState(); 8721 onHoverChanged(true); 8722 } 8723 } else { 8724 if ((mPrivateFlags & PFLAG_HOVERED) != 0) { 8725 mPrivateFlags &= ~PFLAG_HOVERED; 8726 refreshDrawableState(); 8727 onHoverChanged(false); 8728 } 8729 } 8730 } 8731 8732 /** 8733 * Implement this method to handle hover state changes. 8734 * <p> 8735 * This method is called whenever the hover state changes as a result of a 8736 * call to {@link #setHovered}. 8737 * </p> 8738 * 8739 * @param hovered The current hover state, as returned by {@link #isHovered}. 8740 * 8741 * @see #isHovered 8742 * @see #setHovered 8743 */ 8744 public void onHoverChanged(boolean hovered) { 8745 } 8746 8747 /** 8748 * Implement this method to handle touch screen motion events. 8749 * <p> 8750 * If this method is used to detect click actions, it is recommended that 8751 * the actions be performed by implementing and calling 8752 * {@link #performClick()}. This will ensure consistent system behavior, 8753 * including: 8754 * <ul> 8755 * <li>obeying click sound preferences 8756 * <li>dispatching OnClickListener calls 8757 * <li>handling {@link AccessibilityNodeInfo#ACTION_CLICK ACTION_CLICK} when 8758 * accessibility features are enabled 8759 * </ul> 8760 * 8761 * @param event The motion event. 8762 * @return True if the event was handled, false otherwise. 8763 */ 8764 public boolean onTouchEvent(MotionEvent event) { 8765 final int viewFlags = mViewFlags; 8766 8767 if ((viewFlags & ENABLED_MASK) == DISABLED) { 8768 if (event.getAction() == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) { 8769 setPressed(false); 8770 } 8771 // A disabled view that is clickable still consumes the touch 8772 // events, it just doesn't respond to them. 8773 return (((viewFlags & CLICKABLE) == CLICKABLE || 8774 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)); 8775 } 8776 8777 if (mTouchDelegate != null) { 8778 if (mTouchDelegate.onTouchEvent(event)) { 8779 return true; 8780 } 8781 } 8782 8783 if (((viewFlags & CLICKABLE) == CLICKABLE || 8784 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) { 8785 switch (event.getAction()) { 8786 case MotionEvent.ACTION_UP: 8787 boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; 8788 if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { 8789 // take focus if we don't have it already and we should in 8790 // touch mode. 8791 boolean focusTaken = false; 8792 if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { 8793 focusTaken = requestFocus(); 8794 } 8795 8796 if (prepressed) { 8797 // The button is being released before we actually 8798 // showed it as pressed. Make it show the pressed 8799 // state now (before scheduling the click) to ensure 8800 // the user sees it. 8801 setPressed(true); 8802 } 8803 8804 if (!mHasPerformedLongPress) { 8805 // This is a tap, so remove the longpress check 8806 removeLongPressCallback(); 8807 8808 // Only perform take click actions if we were in the pressed state 8809 if (!focusTaken) { 8810 // Use a Runnable and post this rather than calling 8811 // performClick directly. This lets other visual state 8812 // of the view update before click actions start. 8813 if (mPerformClick == null) { 8814 mPerformClick = new PerformClick(); 8815 } 8816 if (!post(mPerformClick)) { 8817 performClick(); 8818 } 8819 } 8820 } 8821 8822 if (mUnsetPressedState == null) { 8823 mUnsetPressedState = new UnsetPressedState(); 8824 } 8825 8826 if (prepressed) { 8827 postDelayed(mUnsetPressedState, 8828 ViewConfiguration.getPressedStateDuration()); 8829 } else if (!post(mUnsetPressedState)) { 8830 // If the post failed, unpress right now 8831 mUnsetPressedState.run(); 8832 } 8833 removeTapCallback(); 8834 } 8835 break; 8836 8837 case MotionEvent.ACTION_DOWN: 8838 mHasPerformedLongPress = false; 8839 8840 if (performButtonActionOnTouchDown(event)) { 8841 break; 8842 } 8843 8844 // Walk up the hierarchy to determine if we're inside a scrolling container. 8845 boolean isInScrollingContainer = isInScrollingContainer(); 8846 8847 // For views inside a scrolling container, delay the pressed feedback for 8848 // a short period in case this is a scroll. 8849 if (isInScrollingContainer) { 8850 mPrivateFlags |= PFLAG_PREPRESSED; 8851 if (mPendingCheckForTap == null) { 8852 mPendingCheckForTap = new CheckForTap(); 8853 } 8854 postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); 8855 } else { 8856 // Not inside a scrolling container, so show the feedback right away 8857 setPressed(true); 8858 checkForLongClick(0); 8859 } 8860 break; 8861 8862 case MotionEvent.ACTION_CANCEL: 8863 setPressed(false); 8864 removeTapCallback(); 8865 removeLongPressCallback(); 8866 break; 8867 8868 case MotionEvent.ACTION_MOVE: 8869 final int x = (int) event.getX(); 8870 final int y = (int) event.getY(); 8871 8872 // Be lenient about moving outside of buttons 8873 if (!pointInView(x, y, mTouchSlop)) { 8874 // Outside button 8875 removeTapCallback(); 8876 if ((mPrivateFlags & PFLAG_PRESSED) != 0) { 8877 // Remove any future long press/tap checks 8878 removeLongPressCallback(); 8879 8880 setPressed(false); 8881 } 8882 } 8883 break; 8884 } 8885 return true; 8886 } 8887 8888 return false; 8889 } 8890 8891 /** 8892 * @hide 8893 */ 8894 public boolean isInScrollingContainer() { 8895 ViewParent p = getParent(); 8896 while (p != null && p instanceof ViewGroup) { 8897 if (((ViewGroup) p).shouldDelayChildPressedState()) { 8898 return true; 8899 } 8900 p = p.getParent(); 8901 } 8902 return false; 8903 } 8904 8905 /** 8906 * Remove the longpress detection timer. 8907 */ 8908 private void removeLongPressCallback() { 8909 if (mPendingCheckForLongPress != null) { 8910 removeCallbacks(mPendingCheckForLongPress); 8911 } 8912 } 8913 8914 /** 8915 * Remove the pending click action 8916 */ 8917 private void removePerformClickCallback() { 8918 if (mPerformClick != null) { 8919 removeCallbacks(mPerformClick); 8920 } 8921 } 8922 8923 /** 8924 * Remove the prepress detection timer. 8925 */ 8926 private void removeUnsetPressCallback() { 8927 if ((mPrivateFlags & PFLAG_PRESSED) != 0 && mUnsetPressedState != null) { 8928 setPressed(false); 8929 removeCallbacks(mUnsetPressedState); 8930 } 8931 } 8932 8933 /** 8934 * Remove the tap detection timer. 8935 */ 8936 private void removeTapCallback() { 8937 if (mPendingCheckForTap != null) { 8938 mPrivateFlags &= ~PFLAG_PREPRESSED; 8939 removeCallbacks(mPendingCheckForTap); 8940 } 8941 } 8942 8943 /** 8944 * Cancels a pending long press. Your subclass can use this if you 8945 * want the context menu to come up if the user presses and holds 8946 * at the same place, but you don't want it to come up if they press 8947 * and then move around enough to cause scrolling. 8948 */ 8949 public void cancelLongPress() { 8950 removeLongPressCallback(); 8951 8952 /* 8953 * The prepressed state handled by the tap callback is a display 8954 * construct, but the tap callback will post a long press callback 8955 * less its own timeout. Remove it here. 8956 */ 8957 removeTapCallback(); 8958 } 8959 8960 /** 8961 * Remove the pending callback for sending a 8962 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 8963 */ 8964 private void removeSendViewScrolledAccessibilityEventCallback() { 8965 if (mSendViewScrolledAccessibilityEvent != null) { 8966 removeCallbacks(mSendViewScrolledAccessibilityEvent); 8967 mSendViewScrolledAccessibilityEvent.mIsPending = false; 8968 } 8969 } 8970 8971 /** 8972 * Sets the TouchDelegate for this View. 8973 */ 8974 public void setTouchDelegate(TouchDelegate delegate) { 8975 mTouchDelegate = delegate; 8976 } 8977 8978 /** 8979 * Gets the TouchDelegate for this View. 8980 */ 8981 public TouchDelegate getTouchDelegate() { 8982 return mTouchDelegate; 8983 } 8984 8985 /** 8986 * Set flags controlling behavior of this view. 8987 * 8988 * @param flags Constant indicating the value which should be set 8989 * @param mask Constant indicating the bit range that should be changed 8990 */ 8991 void setFlags(int flags, int mask) { 8992 final boolean accessibilityEnabled = 8993 AccessibilityManager.getInstance(mContext).isEnabled(); 8994 final boolean oldIncludeForAccessibility = accessibilityEnabled && includeForAccessibility(); 8995 8996 int old = mViewFlags; 8997 mViewFlags = (mViewFlags & ~mask) | (flags & mask); 8998 8999 int changed = mViewFlags ^ old; 9000 if (changed == 0) { 9001 return; 9002 } 9003 int privateFlags = mPrivateFlags; 9004 9005 /* Check if the FOCUSABLE bit has changed */ 9006 if (((changed & FOCUSABLE_MASK) != 0) && 9007 ((privateFlags & PFLAG_HAS_BOUNDS) !=0)) { 9008 if (((old & FOCUSABLE_MASK) == FOCUSABLE) 9009 && ((privateFlags & PFLAG_FOCUSED) != 0)) { 9010 /* Give up focus if we are no longer focusable */ 9011 clearFocus(); 9012 } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) 9013 && ((privateFlags & PFLAG_FOCUSED) == 0)) { 9014 /* 9015 * Tell the view system that we are now available to take focus 9016 * if no one else already has it. 9017 */ 9018 if (mParent != null) mParent.focusableViewAvailable(this); 9019 } 9020 } 9021 9022 final int newVisibility = flags & VISIBILITY_MASK; 9023 if (newVisibility == VISIBLE) { 9024 if ((changed & VISIBILITY_MASK) != 0) { 9025 /* 9026 * If this view is becoming visible, invalidate it in case it changed while 9027 * it was not visible. Marking it drawn ensures that the invalidation will 9028 * go through. 9029 */ 9030 mPrivateFlags |= PFLAG_DRAWN; 9031 invalidate(true); 9032 9033 needGlobalAttributesUpdate(true); 9034 9035 // a view becoming visible is worth notifying the parent 9036 // about in case nothing has focus. even if this specific view 9037 // isn't focusable, it may contain something that is, so let 9038 // the root view try to give this focus if nothing else does. 9039 if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { 9040 mParent.focusableViewAvailable(this); 9041 } 9042 } 9043 } 9044 9045 /* Check if the GONE bit has changed */ 9046 if ((changed & GONE) != 0) { 9047 needGlobalAttributesUpdate(false); 9048 requestLayout(); 9049 9050 if (((mViewFlags & VISIBILITY_MASK) == GONE)) { 9051 if (hasFocus()) clearFocus(); 9052 clearAccessibilityFocus(); 9053 destroyDrawingCache(); 9054 if (mParent instanceof View) { 9055 // GONE views noop invalidation, so invalidate the parent 9056 ((View) mParent).invalidate(true); 9057 } 9058 // Mark the view drawn to ensure that it gets invalidated properly the next 9059 // time it is visible and gets invalidated 9060 mPrivateFlags |= PFLAG_DRAWN; 9061 } 9062 if (mAttachInfo != null) { 9063 mAttachInfo.mViewVisibilityChanged = true; 9064 } 9065 } 9066 9067 /* Check if the VISIBLE bit has changed */ 9068 if ((changed & INVISIBLE) != 0) { 9069 needGlobalAttributesUpdate(false); 9070 /* 9071 * If this view is becoming invisible, set the DRAWN flag so that 9072 * the next invalidate() will not be skipped. 9073 */ 9074 mPrivateFlags |= PFLAG_DRAWN; 9075 9076 if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE)) { 9077 // root view becoming invisible shouldn't clear focus and accessibility focus 9078 if (getRootView() != this) { 9079 if (hasFocus()) clearFocus(); 9080 clearAccessibilityFocus(); 9081 } 9082 } 9083 if (mAttachInfo != null) { 9084 mAttachInfo.mViewVisibilityChanged = true; 9085 } 9086 } 9087 9088 if ((changed & VISIBILITY_MASK) != 0) { 9089 // If the view is invisible, cleanup its display list to free up resources 9090 if (newVisibility != VISIBLE) { 9091 cleanupDraw(); 9092 } 9093 9094 if (mParent instanceof ViewGroup) { 9095 ((ViewGroup) mParent).onChildVisibilityChanged(this, 9096 (changed & VISIBILITY_MASK), newVisibility); 9097 ((View) mParent).invalidate(true); 9098 } else if (mParent != null) { 9099 mParent.invalidateChild(this, null); 9100 } 9101 dispatchVisibilityChanged(this, newVisibility); 9102 } 9103 9104 if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { 9105 destroyDrawingCache(); 9106 } 9107 9108 if ((changed & DRAWING_CACHE_ENABLED) != 0) { 9109 destroyDrawingCache(); 9110 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 9111 invalidateParentCaches(); 9112 } 9113 9114 if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { 9115 destroyDrawingCache(); 9116 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 9117 } 9118 9119 if ((changed & DRAW_MASK) != 0) { 9120 if ((mViewFlags & WILL_NOT_DRAW) != 0) { 9121 if (mBackground != null) { 9122 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 9123 mPrivateFlags |= PFLAG_ONLY_DRAWS_BACKGROUND; 9124 } else { 9125 mPrivateFlags |= PFLAG_SKIP_DRAW; 9126 } 9127 } else { 9128 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 9129 } 9130 requestLayout(); 9131 invalidate(true); 9132 } 9133 9134 if ((changed & KEEP_SCREEN_ON) != 0) { 9135 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 9136 mParent.recomputeViewAttributes(this); 9137 } 9138 } 9139 9140 if (accessibilityEnabled) { 9141 if ((changed & FOCUSABLE_MASK) != 0 || (changed & VISIBILITY_MASK) != 0 9142 || (changed & CLICKABLE) != 0 || (changed & LONG_CLICKABLE) != 0) { 9143 if (oldIncludeForAccessibility != includeForAccessibility()) { 9144 notifySubtreeAccessibilityStateChangedIfNeeded(); 9145 } else { 9146 notifyViewAccessibilityStateChangedIfNeeded( 9147 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 9148 } 9149 } else if ((changed & ENABLED_MASK) != 0) { 9150 notifyViewAccessibilityStateChangedIfNeeded( 9151 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 9152 } 9153 } 9154 } 9155 9156 /** 9157 * Change the view's z order in the tree, so it's on top of other sibling 9158 * views. This ordering change may affect layout, if the parent container 9159 * uses an order-dependent layout scheme (e.g., LinearLayout). Prior 9160 * to {@link android.os.Build.VERSION_CODES#KITKAT} this 9161 * method should be followed by calls to {@link #requestLayout()} and 9162 * {@link View#invalidate()} on the view's parent to force the parent to redraw 9163 * with the new child ordering. 9164 * 9165 * @see ViewGroup#bringChildToFront(View) 9166 */ 9167 public void bringToFront() { 9168 if (mParent != null) { 9169 mParent.bringChildToFront(this); 9170 } 9171 } 9172 9173 /** 9174 * This is called in response to an internal scroll in this view (i.e., the 9175 * view scrolled its own contents). This is typically as a result of 9176 * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been 9177 * called. 9178 * 9179 * @param l Current horizontal scroll origin. 9180 * @param t Current vertical scroll origin. 9181 * @param oldl Previous horizontal scroll origin. 9182 * @param oldt Previous vertical scroll origin. 9183 */ 9184 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 9185 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 9186 postSendViewScrolledAccessibilityEventCallback(); 9187 } 9188 9189 mBackgroundSizeChanged = true; 9190 9191 final AttachInfo ai = mAttachInfo; 9192 if (ai != null) { 9193 ai.mViewScrollChanged = true; 9194 } 9195 } 9196 9197 /** 9198 * Interface definition for a callback to be invoked when the layout bounds of a view 9199 * changes due to layout processing. 9200 */ 9201 public interface OnLayoutChangeListener { 9202 /** 9203 * Called when the layout bounds of a view changes due to layout processing. 9204 * 9205 * @param v The view whose bounds have changed. 9206 * @param left The new value of the view's left property. 9207 * @param top The new value of the view's top property. 9208 * @param right The new value of the view's right property. 9209 * @param bottom The new value of the view's bottom property. 9210 * @param oldLeft The previous value of the view's left property. 9211 * @param oldTop The previous value of the view's top property. 9212 * @param oldRight The previous value of the view's right property. 9213 * @param oldBottom The previous value of the view's bottom property. 9214 */ 9215 void onLayoutChange(View v, int left, int top, int right, int bottom, 9216 int oldLeft, int oldTop, int oldRight, int oldBottom); 9217 } 9218 9219 /** 9220 * This is called during layout when the size of this view has changed. If 9221 * you were just added to the view hierarchy, you're called with the old 9222 * values of 0. 9223 * 9224 * @param w Current width of this view. 9225 * @param h Current height of this view. 9226 * @param oldw Old width of this view. 9227 * @param oldh Old height of this view. 9228 */ 9229 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 9230 } 9231 9232 /** 9233 * Called by draw to draw the child views. This may be overridden 9234 * by derived classes to gain control just before its children are drawn 9235 * (but after its own view has been drawn). 9236 * @param canvas the canvas on which to draw the view 9237 */ 9238 protected void dispatchDraw(Canvas canvas) { 9239 9240 } 9241 9242 /** 9243 * Gets the parent of this view. Note that the parent is a 9244 * ViewParent and not necessarily a View. 9245 * 9246 * @return Parent of this view. 9247 */ 9248 public final ViewParent getParent() { 9249 return mParent; 9250 } 9251 9252 /** 9253 * Set the horizontal scrolled position of your view. This will cause a call to 9254 * {@link #onScrollChanged(int, int, int, int)} and the view will be 9255 * invalidated. 9256 * @param value the x position to scroll to 9257 */ 9258 public void setScrollX(int value) { 9259 scrollTo(value, mScrollY); 9260 } 9261 9262 /** 9263 * Set the vertical scrolled position of your view. This will cause a call to 9264 * {@link #onScrollChanged(int, int, int, int)} and the view will be 9265 * invalidated. 9266 * @param value the y position to scroll to 9267 */ 9268 public void setScrollY(int value) { 9269 scrollTo(mScrollX, value); 9270 } 9271 9272 /** 9273 * Return the scrolled left position of this view. This is the left edge of 9274 * the displayed part of your view. You do not need to draw any pixels 9275 * farther left, since those are outside of the frame of your view on 9276 * screen. 9277 * 9278 * @return The left edge of the displayed part of your view, in pixels. 9279 */ 9280 public final int getScrollX() { 9281 return mScrollX; 9282 } 9283 9284 /** 9285 * Return the scrolled top position of this view. This is the top edge of 9286 * the displayed part of your view. You do not need to draw any pixels above 9287 * it, since those are outside of the frame of your view on screen. 9288 * 9289 * @return The top edge of the displayed part of your view, in pixels. 9290 */ 9291 public final int getScrollY() { 9292 return mScrollY; 9293 } 9294 9295 /** 9296 * Return the width of the your view. 9297 * 9298 * @return The width of your view, in pixels. 9299 */ 9300 @ViewDebug.ExportedProperty(category = "layout") 9301 public final int getWidth() { 9302 return mRight - mLeft; 9303 } 9304 9305 /** 9306 * Return the height of your view. 9307 * 9308 * @return The height of your view, in pixels. 9309 */ 9310 @ViewDebug.ExportedProperty(category = "layout") 9311 public final int getHeight() { 9312 return mBottom - mTop; 9313 } 9314 9315 /** 9316 * Return the visible drawing bounds of your view. Fills in the output 9317 * rectangle with the values from getScrollX(), getScrollY(), 9318 * getWidth(), and getHeight(). These bounds do not account for any 9319 * transformation properties currently set on the view, such as 9320 * {@link #setScaleX(float)} or {@link #setRotation(float)}. 9321 * 9322 * @param outRect The (scrolled) drawing bounds of the view. 9323 */ 9324 public void getDrawingRect(Rect outRect) { 9325 outRect.left = mScrollX; 9326 outRect.top = mScrollY; 9327 outRect.right = mScrollX + (mRight - mLeft); 9328 outRect.bottom = mScrollY + (mBottom - mTop); 9329 } 9330 9331 /** 9332 * Like {@link #getMeasuredWidthAndState()}, but only returns the 9333 * raw width component (that is the result is masked by 9334 * {@link #MEASURED_SIZE_MASK}). 9335 * 9336 * @return The raw measured width of this view. 9337 */ 9338 public final int getMeasuredWidth() { 9339 return mMeasuredWidth & MEASURED_SIZE_MASK; 9340 } 9341 9342 /** 9343 * Return the full width measurement information for this view as computed 9344 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 9345 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 9346 * This should be used during measurement and layout calculations only. Use 9347 * {@link #getWidth()} to see how wide a view is after layout. 9348 * 9349 * @return The measured width of this view as a bit mask. 9350 */ 9351 public final int getMeasuredWidthAndState() { 9352 return mMeasuredWidth; 9353 } 9354 9355 /** 9356 * Like {@link #getMeasuredHeightAndState()}, but only returns the 9357 * raw width component (that is the result is masked by 9358 * {@link #MEASURED_SIZE_MASK}). 9359 * 9360 * @return The raw measured height of this view. 9361 */ 9362 public final int getMeasuredHeight() { 9363 return mMeasuredHeight & MEASURED_SIZE_MASK; 9364 } 9365 9366 /** 9367 * Return the full height measurement information for this view as computed 9368 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 9369 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 9370 * This should be used during measurement and layout calculations only. Use 9371 * {@link #getHeight()} to see how wide a view is after layout. 9372 * 9373 * @return The measured width of this view as a bit mask. 9374 */ 9375 public final int getMeasuredHeightAndState() { 9376 return mMeasuredHeight; 9377 } 9378 9379 /** 9380 * Return only the state bits of {@link #getMeasuredWidthAndState()} 9381 * and {@link #getMeasuredHeightAndState()}, combined into one integer. 9382 * The width component is in the regular bits {@link #MEASURED_STATE_MASK} 9383 * and the height component is at the shifted bits 9384 * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. 9385 */ 9386 public final int getMeasuredState() { 9387 return (mMeasuredWidth&MEASURED_STATE_MASK) 9388 | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) 9389 & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); 9390 } 9391 9392 /** 9393 * The transform matrix of this view, which is calculated based on the current 9394 * roation, scale, and pivot properties. 9395 * 9396 * @see #getRotation() 9397 * @see #getScaleX() 9398 * @see #getScaleY() 9399 * @see #getPivotX() 9400 * @see #getPivotY() 9401 * @return The current transform matrix for the view 9402 */ 9403 public Matrix getMatrix() { 9404 if (mTransformationInfo != null) { 9405 updateMatrix(); 9406 return mTransformationInfo.mMatrix; 9407 } 9408 return Matrix.IDENTITY_MATRIX; 9409 } 9410 9411 /** 9412 * Utility function to determine if the value is far enough away from zero to be 9413 * considered non-zero. 9414 * @param value A floating point value to check for zero-ness 9415 * @return whether the passed-in value is far enough away from zero to be considered non-zero 9416 */ 9417 private static boolean nonzero(float value) { 9418 return (value < -NONZERO_EPSILON || value > NONZERO_EPSILON); 9419 } 9420 9421 /** 9422 * Returns true if the transform matrix is the identity matrix. 9423 * Recomputes the matrix if necessary. 9424 * 9425 * @return True if the transform matrix is the identity matrix, false otherwise. 9426 */ 9427 final boolean hasIdentityMatrix() { 9428 if (mTransformationInfo != null) { 9429 updateMatrix(); 9430 return mTransformationInfo.mMatrixIsIdentity; 9431 } 9432 return true; 9433 } 9434 9435 void ensureTransformationInfo() { 9436 if (mTransformationInfo == null) { 9437 mTransformationInfo = new TransformationInfo(); 9438 } 9439 } 9440 9441 /** 9442 * Recomputes the transform matrix if necessary. 9443 */ 9444 private void updateMatrix() { 9445 final TransformationInfo info = mTransformationInfo; 9446 if (info == null) { 9447 return; 9448 } 9449 if (info.mMatrixDirty) { 9450 // transform-related properties have changed since the last time someone 9451 // asked for the matrix; recalculate it with the current values 9452 9453 // Figure out if we need to update the pivot point 9454 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 9455 if ((mRight - mLeft) != info.mPrevWidth || (mBottom - mTop) != info.mPrevHeight) { 9456 info.mPrevWidth = mRight - mLeft; 9457 info.mPrevHeight = mBottom - mTop; 9458 info.mPivotX = info.mPrevWidth / 2f; 9459 info.mPivotY = info.mPrevHeight / 2f; 9460 } 9461 } 9462 info.mMatrix.reset(); 9463 if (!nonzero(info.mRotationX) && !nonzero(info.mRotationY)) { 9464 info.mMatrix.setTranslate(info.mTranslationX, info.mTranslationY); 9465 info.mMatrix.preRotate(info.mRotation, info.mPivotX, info.mPivotY); 9466 info.mMatrix.preScale(info.mScaleX, info.mScaleY, info.mPivotX, info.mPivotY); 9467 } else { 9468 if (info.mCamera == null) { 9469 info.mCamera = new Camera(); 9470 info.matrix3D = new Matrix(); 9471 } 9472 info.mCamera.save(); 9473 info.mMatrix.preScale(info.mScaleX, info.mScaleY, info.mPivotX, info.mPivotY); 9474 info.mCamera.rotate(info.mRotationX, info.mRotationY, -info.mRotation); 9475 info.mCamera.getMatrix(info.matrix3D); 9476 info.matrix3D.preTranslate(-info.mPivotX, -info.mPivotY); 9477 info.matrix3D.postTranslate(info.mPivotX + info.mTranslationX, 9478 info.mPivotY + info.mTranslationY); 9479 info.mMatrix.postConcat(info.matrix3D); 9480 info.mCamera.restore(); 9481 } 9482 info.mMatrixDirty = false; 9483 info.mMatrixIsIdentity = info.mMatrix.isIdentity(); 9484 info.mInverseMatrixDirty = true; 9485 } 9486 } 9487 9488 /** 9489 * Utility method to retrieve the inverse of the current mMatrix property. 9490 * We cache the matrix to avoid recalculating it when transform properties 9491 * have not changed. 9492 * 9493 * @return The inverse of the current matrix of this view. 9494 */ 9495 final Matrix getInverseMatrix() { 9496 final TransformationInfo info = mTransformationInfo; 9497 if (info != null) { 9498 updateMatrix(); 9499 if (info.mInverseMatrixDirty) { 9500 if (info.mInverseMatrix == null) { 9501 info.mInverseMatrix = new Matrix(); 9502 } 9503 info.mMatrix.invert(info.mInverseMatrix); 9504 info.mInverseMatrixDirty = false; 9505 } 9506 return info.mInverseMatrix; 9507 } 9508 return Matrix.IDENTITY_MATRIX; 9509 } 9510 9511 /** 9512 * Gets the distance along the Z axis from the camera to this view. 9513 * 9514 * @see #setCameraDistance(float) 9515 * 9516 * @return The distance along the Z axis. 9517 */ 9518 public float getCameraDistance() { 9519 ensureTransformationInfo(); 9520 final float dpi = mResources.getDisplayMetrics().densityDpi; 9521 final TransformationInfo info = mTransformationInfo; 9522 if (info.mCamera == null) { 9523 info.mCamera = new Camera(); 9524 info.matrix3D = new Matrix(); 9525 } 9526 return -(info.mCamera.getLocationZ() * dpi); 9527 } 9528 9529 /** 9530 * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which 9531 * views are drawn) from the camera to this view. The camera's distance 9532 * affects 3D transformations, for instance rotations around the X and Y 9533 * axis. If the rotationX or rotationY properties are changed and this view is 9534 * large (more than half the size of the screen), it is recommended to always 9535 * use a camera distance that's greater than the height (X axis rotation) or 9536 * the width (Y axis rotation) of this view.</p> 9537 * 9538 * <p>The distance of the camera from the view plane can have an affect on the 9539 * perspective distortion of the view when it is rotated around the x or y axis. 9540 * For example, a large distance will result in a large viewing angle, and there 9541 * will not be much perspective distortion of the view as it rotates. A short 9542 * distance may cause much more perspective distortion upon rotation, and can 9543 * also result in some drawing artifacts if the rotated view ends up partially 9544 * behind the camera (which is why the recommendation is to use a distance at 9545 * least as far as the size of the view, if the view is to be rotated.)</p> 9546 * 9547 * <p>The distance is expressed in "depth pixels." The default distance depends 9548 * on the screen density. For instance, on a medium density display, the 9549 * default distance is 1280. On a high density display, the default distance 9550 * is 1920.</p> 9551 * 9552 * <p>If you want to specify a distance that leads to visually consistent 9553 * results across various densities, use the following formula:</p> 9554 * <pre> 9555 * float scale = context.getResources().getDisplayMetrics().density; 9556 * view.setCameraDistance(distance * scale); 9557 * </pre> 9558 * 9559 * <p>The density scale factor of a high density display is 1.5, 9560 * and 1920 = 1280 * 1.5.</p> 9561 * 9562 * @param distance The distance in "depth pixels", if negative the opposite 9563 * value is used 9564 * 9565 * @see #setRotationX(float) 9566 * @see #setRotationY(float) 9567 */ 9568 public void setCameraDistance(float distance) { 9569 invalidateViewProperty(true, false); 9570 9571 ensureTransformationInfo(); 9572 final float dpi = mResources.getDisplayMetrics().densityDpi; 9573 final TransformationInfo info = mTransformationInfo; 9574 if (info.mCamera == null) { 9575 info.mCamera = new Camera(); 9576 info.matrix3D = new Matrix(); 9577 } 9578 9579 info.mCamera.setLocation(0.0f, 0.0f, -Math.abs(distance) / dpi); 9580 info.mMatrixDirty = true; 9581 9582 invalidateViewProperty(false, false); 9583 if (mDisplayList != null) { 9584 mDisplayList.setCameraDistance(-Math.abs(distance) / dpi); 9585 } 9586 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9587 // View was rejected last time it was drawn by its parent; this may have changed 9588 invalidateParentIfNeeded(); 9589 } 9590 } 9591 9592 /** 9593 * The degrees that the view is rotated around the pivot point. 9594 * 9595 * @see #setRotation(float) 9596 * @see #getPivotX() 9597 * @see #getPivotY() 9598 * 9599 * @return The degrees of rotation. 9600 */ 9601 @ViewDebug.ExportedProperty(category = "drawing") 9602 public float getRotation() { 9603 return mTransformationInfo != null ? mTransformationInfo.mRotation : 0; 9604 } 9605 9606 /** 9607 * Sets the degrees that the view is rotated around the pivot point. Increasing values 9608 * result in clockwise rotation. 9609 * 9610 * @param rotation The degrees of rotation. 9611 * 9612 * @see #getRotation() 9613 * @see #getPivotX() 9614 * @see #getPivotY() 9615 * @see #setRotationX(float) 9616 * @see #setRotationY(float) 9617 * 9618 * @attr ref android.R.styleable#View_rotation 9619 */ 9620 public void setRotation(float rotation) { 9621 ensureTransformationInfo(); 9622 final TransformationInfo info = mTransformationInfo; 9623 if (info.mRotation != rotation) { 9624 // Double-invalidation is necessary to capture view's old and new areas 9625 invalidateViewProperty(true, false); 9626 info.mRotation = rotation; 9627 info.mMatrixDirty = true; 9628 invalidateViewProperty(false, true); 9629 if (mDisplayList != null) { 9630 mDisplayList.setRotation(rotation); 9631 } 9632 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9633 // View was rejected last time it was drawn by its parent; this may have changed 9634 invalidateParentIfNeeded(); 9635 } 9636 } 9637 } 9638 9639 /** 9640 * The degrees that the view is rotated around the vertical axis through the pivot point. 9641 * 9642 * @see #getPivotX() 9643 * @see #getPivotY() 9644 * @see #setRotationY(float) 9645 * 9646 * @return The degrees of Y rotation. 9647 */ 9648 @ViewDebug.ExportedProperty(category = "drawing") 9649 public float getRotationY() { 9650 return mTransformationInfo != null ? mTransformationInfo.mRotationY : 0; 9651 } 9652 9653 /** 9654 * Sets the degrees that the view is rotated around the vertical axis through the pivot point. 9655 * Increasing values result in counter-clockwise rotation from the viewpoint of looking 9656 * down the y axis. 9657 * 9658 * When rotating large views, it is recommended to adjust the camera distance 9659 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 9660 * 9661 * @param rotationY The degrees of Y rotation. 9662 * 9663 * @see #getRotationY() 9664 * @see #getPivotX() 9665 * @see #getPivotY() 9666 * @see #setRotation(float) 9667 * @see #setRotationX(float) 9668 * @see #setCameraDistance(float) 9669 * 9670 * @attr ref android.R.styleable#View_rotationY 9671 */ 9672 public void setRotationY(float rotationY) { 9673 ensureTransformationInfo(); 9674 final TransformationInfo info = mTransformationInfo; 9675 if (info.mRotationY != rotationY) { 9676 invalidateViewProperty(true, false); 9677 info.mRotationY = rotationY; 9678 info.mMatrixDirty = true; 9679 invalidateViewProperty(false, true); 9680 if (mDisplayList != null) { 9681 mDisplayList.setRotationY(rotationY); 9682 } 9683 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9684 // View was rejected last time it was drawn by its parent; this may have changed 9685 invalidateParentIfNeeded(); 9686 } 9687 } 9688 } 9689 9690 /** 9691 * The degrees that the view is rotated around the horizontal axis through the pivot point. 9692 * 9693 * @see #getPivotX() 9694 * @see #getPivotY() 9695 * @see #setRotationX(float) 9696 * 9697 * @return The degrees of X rotation. 9698 */ 9699 @ViewDebug.ExportedProperty(category = "drawing") 9700 public float getRotationX() { 9701 return mTransformationInfo != null ? mTransformationInfo.mRotationX : 0; 9702 } 9703 9704 /** 9705 * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. 9706 * Increasing values result in clockwise rotation from the viewpoint of looking down the 9707 * x axis. 9708 * 9709 * When rotating large views, it is recommended to adjust the camera distance 9710 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 9711 * 9712 * @param rotationX The degrees of X rotation. 9713 * 9714 * @see #getRotationX() 9715 * @see #getPivotX() 9716 * @see #getPivotY() 9717 * @see #setRotation(float) 9718 * @see #setRotationY(float) 9719 * @see #setCameraDistance(float) 9720 * 9721 * @attr ref android.R.styleable#View_rotationX 9722 */ 9723 public void setRotationX(float rotationX) { 9724 ensureTransformationInfo(); 9725 final TransformationInfo info = mTransformationInfo; 9726 if (info.mRotationX != rotationX) { 9727 invalidateViewProperty(true, false); 9728 info.mRotationX = rotationX; 9729 info.mMatrixDirty = true; 9730 invalidateViewProperty(false, true); 9731 if (mDisplayList != null) { 9732 mDisplayList.setRotationX(rotationX); 9733 } 9734 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9735 // View was rejected last time it was drawn by its parent; this may have changed 9736 invalidateParentIfNeeded(); 9737 } 9738 } 9739 } 9740 9741 /** 9742 * The amount that the view is scaled in x around the pivot point, as a proportion of 9743 * the view's unscaled width. A value of 1, the default, means that no scaling is applied. 9744 * 9745 * <p>By default, this is 1.0f. 9746 * 9747 * @see #getPivotX() 9748 * @see #getPivotY() 9749 * @return The scaling factor. 9750 */ 9751 @ViewDebug.ExportedProperty(category = "drawing") 9752 public float getScaleX() { 9753 return mTransformationInfo != null ? mTransformationInfo.mScaleX : 1; 9754 } 9755 9756 /** 9757 * Sets the amount that the view is scaled in x around the pivot point, as a proportion of 9758 * the view's unscaled width. A value of 1 means that no scaling is applied. 9759 * 9760 * @param scaleX The scaling factor. 9761 * @see #getPivotX() 9762 * @see #getPivotY() 9763 * 9764 * @attr ref android.R.styleable#View_scaleX 9765 */ 9766 public void setScaleX(float scaleX) { 9767 ensureTransformationInfo(); 9768 final TransformationInfo info = mTransformationInfo; 9769 if (info.mScaleX != scaleX) { 9770 invalidateViewProperty(true, false); 9771 info.mScaleX = scaleX; 9772 info.mMatrixDirty = true; 9773 invalidateViewProperty(false, true); 9774 if (mDisplayList != null) { 9775 mDisplayList.setScaleX(scaleX); 9776 } 9777 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9778 // View was rejected last time it was drawn by its parent; this may have changed 9779 invalidateParentIfNeeded(); 9780 } 9781 } 9782 } 9783 9784 /** 9785 * The amount that the view is scaled in y around the pivot point, as a proportion of 9786 * the view's unscaled height. A value of 1, the default, means that no scaling is applied. 9787 * 9788 * <p>By default, this is 1.0f. 9789 * 9790 * @see #getPivotX() 9791 * @see #getPivotY() 9792 * @return The scaling factor. 9793 */ 9794 @ViewDebug.ExportedProperty(category = "drawing") 9795 public float getScaleY() { 9796 return mTransformationInfo != null ? mTransformationInfo.mScaleY : 1; 9797 } 9798 9799 /** 9800 * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of 9801 * the view's unscaled width. A value of 1 means that no scaling is applied. 9802 * 9803 * @param scaleY The scaling factor. 9804 * @see #getPivotX() 9805 * @see #getPivotY() 9806 * 9807 * @attr ref android.R.styleable#View_scaleY 9808 */ 9809 public void setScaleY(float scaleY) { 9810 ensureTransformationInfo(); 9811 final TransformationInfo info = mTransformationInfo; 9812 if (info.mScaleY != scaleY) { 9813 invalidateViewProperty(true, false); 9814 info.mScaleY = scaleY; 9815 info.mMatrixDirty = true; 9816 invalidateViewProperty(false, true); 9817 if (mDisplayList != null) { 9818 mDisplayList.setScaleY(scaleY); 9819 } 9820 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9821 // View was rejected last time it was drawn by its parent; this may have changed 9822 invalidateParentIfNeeded(); 9823 } 9824 } 9825 } 9826 9827 /** 9828 * The x location of the point around which the view is {@link #setRotation(float) rotated} 9829 * and {@link #setScaleX(float) scaled}. 9830 * 9831 * @see #getRotation() 9832 * @see #getScaleX() 9833 * @see #getScaleY() 9834 * @see #getPivotY() 9835 * @return The x location of the pivot point. 9836 * 9837 * @attr ref android.R.styleable#View_transformPivotX 9838 */ 9839 @ViewDebug.ExportedProperty(category = "drawing") 9840 public float getPivotX() { 9841 return mTransformationInfo != null ? mTransformationInfo.mPivotX : 0; 9842 } 9843 9844 /** 9845 * Sets the x location of the point around which the view is 9846 * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. 9847 * By default, the pivot point is centered on the object. 9848 * Setting this property disables this behavior and causes the view to use only the 9849 * explicitly set pivotX and pivotY values. 9850 * 9851 * @param pivotX The x location of the pivot point. 9852 * @see #getRotation() 9853 * @see #getScaleX() 9854 * @see #getScaleY() 9855 * @see #getPivotY() 9856 * 9857 * @attr ref android.R.styleable#View_transformPivotX 9858 */ 9859 public void setPivotX(float pivotX) { 9860 ensureTransformationInfo(); 9861 final TransformationInfo info = mTransformationInfo; 9862 boolean pivotSet = (mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 9863 PFLAG_PIVOT_EXPLICITLY_SET; 9864 if (info.mPivotX != pivotX || !pivotSet) { 9865 mPrivateFlags |= PFLAG_PIVOT_EXPLICITLY_SET; 9866 invalidateViewProperty(true, false); 9867 info.mPivotX = pivotX; 9868 info.mMatrixDirty = true; 9869 invalidateViewProperty(false, true); 9870 if (mDisplayList != null) { 9871 mDisplayList.setPivotX(pivotX); 9872 } 9873 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9874 // View was rejected last time it was drawn by its parent; this may have changed 9875 invalidateParentIfNeeded(); 9876 } 9877 } 9878 } 9879 9880 /** 9881 * The y location of the point around which the view is {@link #setRotation(float) rotated} 9882 * and {@link #setScaleY(float) scaled}. 9883 * 9884 * @see #getRotation() 9885 * @see #getScaleX() 9886 * @see #getScaleY() 9887 * @see #getPivotY() 9888 * @return The y location of the pivot point. 9889 * 9890 * @attr ref android.R.styleable#View_transformPivotY 9891 */ 9892 @ViewDebug.ExportedProperty(category = "drawing") 9893 public float getPivotY() { 9894 return mTransformationInfo != null ? mTransformationInfo.mPivotY : 0; 9895 } 9896 9897 /** 9898 * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} 9899 * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. 9900 * Setting this property disables this behavior and causes the view to use only the 9901 * explicitly set pivotX and pivotY values. 9902 * 9903 * @param pivotY The y location of the pivot point. 9904 * @see #getRotation() 9905 * @see #getScaleX() 9906 * @see #getScaleY() 9907 * @see #getPivotY() 9908 * 9909 * @attr ref android.R.styleable#View_transformPivotY 9910 */ 9911 public void setPivotY(float pivotY) { 9912 ensureTransformationInfo(); 9913 final TransformationInfo info = mTransformationInfo; 9914 boolean pivotSet = (mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 9915 PFLAG_PIVOT_EXPLICITLY_SET; 9916 if (info.mPivotY != pivotY || !pivotSet) { 9917 mPrivateFlags |= PFLAG_PIVOT_EXPLICITLY_SET; 9918 invalidateViewProperty(true, false); 9919 info.mPivotY = pivotY; 9920 info.mMatrixDirty = true; 9921 invalidateViewProperty(false, true); 9922 if (mDisplayList != null) { 9923 mDisplayList.setPivotY(pivotY); 9924 } 9925 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9926 // View was rejected last time it was drawn by its parent; this may have changed 9927 invalidateParentIfNeeded(); 9928 } 9929 } 9930 } 9931 9932 /** 9933 * The opacity of the view. This is a value from 0 to 1, where 0 means the view is 9934 * completely transparent and 1 means the view is completely opaque. 9935 * 9936 * <p>By default this is 1.0f. 9937 * @return The opacity of the view. 9938 */ 9939 @ViewDebug.ExportedProperty(category = "drawing") 9940 public float getAlpha() { 9941 return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; 9942 } 9943 9944 /** 9945 * Returns whether this View has content which overlaps. 9946 * 9947 * <p>This function, intended to be overridden by specific View types, is an optimization when 9948 * alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to 9949 * an offscreen buffer and then composited into place, which can be expensive. If the view has 9950 * no overlapping rendering, the view can draw each primitive with the appropriate alpha value 9951 * directly. An example of overlapping rendering is a TextView with a background image, such as 9952 * a Button. An example of non-overlapping rendering is a TextView with no background, or an 9953 * ImageView with only the foreground image. The default implementation returns true; subclasses 9954 * should override if they have cases which can be optimized.</p> 9955 * 9956 * <p>The current implementation of the saveLayer and saveLayerAlpha methods in {@link Canvas} 9957 * necessitates that a View return true if it uses the methods internally without passing the 9958 * {@link Canvas#CLIP_TO_LAYER_SAVE_FLAG}.</p> 9959 * 9960 * @return true if the content in this view might overlap, false otherwise. 9961 */ 9962 public boolean hasOverlappingRendering() { 9963 return true; 9964 } 9965 9966 /** 9967 * <p>Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is 9968 * completely transparent and 1 means the view is completely opaque.</p> 9969 * 9970 * <p> Note that setting alpha to a translucent value (0 < alpha < 1) can have significant 9971 * performance implications, especially for large views. It is best to use the alpha property 9972 * sparingly and transiently, as in the case of fading animations.</p> 9973 * 9974 * <p>For a view with a frequently changing alpha, such as during a fading animation, it is 9975 * strongly recommended for performance reasons to either override 9976 * {@link #hasOverlappingRendering()} to return false if appropriate, or setting a 9977 * {@link #setLayerType(int, android.graphics.Paint) layer type} on the view.</p> 9978 * 9979 * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is 9980 * responsible for applying the opacity itself.</p> 9981 * 9982 * <p>Note that if the view is backed by a 9983 * {@link #setLayerType(int, android.graphics.Paint) layer} and is associated with a 9984 * {@link #setLayerPaint(android.graphics.Paint) layer paint}, setting an alpha value less than 9985 * 1.0 will supercede the alpha of the layer paint.</p> 9986 * 9987 * @param alpha The opacity of the view. 9988 * 9989 * @see #hasOverlappingRendering() 9990 * @see #setLayerType(int, android.graphics.Paint) 9991 * 9992 * @attr ref android.R.styleable#View_alpha 9993 */ 9994 public void setAlpha(float alpha) { 9995 ensureTransformationInfo(); 9996 if (mTransformationInfo.mAlpha != alpha) { 9997 mTransformationInfo.mAlpha = alpha; 9998 if (onSetAlpha((int) (alpha * 255))) { 9999 mPrivateFlags |= PFLAG_ALPHA_SET; 10000 // subclass is handling alpha - don't optimize rendering cache invalidation 10001 invalidateParentCaches(); 10002 invalidate(true); 10003 } else { 10004 mPrivateFlags &= ~PFLAG_ALPHA_SET; 10005 invalidateViewProperty(true, false); 10006 if (mDisplayList != null) { 10007 mDisplayList.setAlpha(getFinalAlpha()); 10008 } 10009 } 10010 } 10011 } 10012 10013 /** 10014 * Faster version of setAlpha() which performs the same steps except there are 10015 * no calls to invalidate(). The caller of this function should perform proper invalidation 10016 * on the parent and this object. The return value indicates whether the subclass handles 10017 * alpha (the return value for onSetAlpha()). 10018 * 10019 * @param alpha The new value for the alpha property 10020 * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and 10021 * the new value for the alpha property is different from the old value 10022 */ 10023 boolean setAlphaNoInvalidation(float alpha) { 10024 ensureTransformationInfo(); 10025 if (mTransformationInfo.mAlpha != alpha) { 10026 mTransformationInfo.mAlpha = alpha; 10027 boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); 10028 if (subclassHandlesAlpha) { 10029 mPrivateFlags |= PFLAG_ALPHA_SET; 10030 return true; 10031 } else { 10032 mPrivateFlags &= ~PFLAG_ALPHA_SET; 10033 if (mDisplayList != null) { 10034 mDisplayList.setAlpha(getFinalAlpha()); 10035 } 10036 } 10037 } 10038 return false; 10039 } 10040 10041 /** 10042 * This property is hidden and intended only for use by the Fade transition, which 10043 * animates it to produce a visual translucency that does not side-effect (or get 10044 * affected by) the real alpha property. This value is composited with the other 10045 * alpha value (and the AlphaAnimation value, when that is present) to produce 10046 * a final visual translucency result, which is what is passed into the DisplayList. 10047 * 10048 * @hide 10049 */ 10050 public void setTransitionAlpha(float alpha) { 10051 ensureTransformationInfo(); 10052 if (mTransformationInfo.mTransitionAlpha != alpha) { 10053 mTransformationInfo.mTransitionAlpha = alpha; 10054 mPrivateFlags &= ~PFLAG_ALPHA_SET; 10055 invalidateViewProperty(true, false); 10056 if (mDisplayList != null) { 10057 mDisplayList.setAlpha(getFinalAlpha()); 10058 } 10059 } 10060 } 10061 10062 /** 10063 * Calculates the visual alpha of this view, which is a combination of the actual 10064 * alpha value and the transitionAlpha value (if set). 10065 */ 10066 private float getFinalAlpha() { 10067 if (mTransformationInfo != null) { 10068 return mTransformationInfo.mAlpha * mTransformationInfo.mTransitionAlpha; 10069 } 10070 return 1; 10071 } 10072 10073 /** 10074 * This property is hidden and intended only for use by the Fade transition, which 10075 * animates it to produce a visual translucency that does not side-effect (or get 10076 * affected by) the real alpha property. This value is composited with the other 10077 * alpha value (and the AlphaAnimation value, when that is present) to produce 10078 * a final visual translucency result, which is what is passed into the DisplayList. 10079 * 10080 * @hide 10081 */ 10082 public float getTransitionAlpha() { 10083 return mTransformationInfo != null ? mTransformationInfo.mTransitionAlpha : 1; 10084 } 10085 10086 /** 10087 * Top position of this view relative to its parent. 10088 * 10089 * @return The top of this view, in pixels. 10090 */ 10091 @ViewDebug.CapturedViewProperty 10092 public final int getTop() { 10093 return mTop; 10094 } 10095 10096 /** 10097 * Sets the top position of this view relative to its parent. This method is meant to be called 10098 * by the layout system and should not generally be called otherwise, because the property 10099 * may be changed at any time by the layout. 10100 * 10101 * @param top The top of this view, in pixels. 10102 */ 10103 public final void setTop(int top) { 10104 if (top != mTop) { 10105 updateMatrix(); 10106 final boolean matrixIsIdentity = mTransformationInfo == null 10107 || mTransformationInfo.mMatrixIsIdentity; 10108 if (matrixIsIdentity) { 10109 if (mAttachInfo != null) { 10110 int minTop; 10111 int yLoc; 10112 if (top < mTop) { 10113 minTop = top; 10114 yLoc = top - mTop; 10115 } else { 10116 minTop = mTop; 10117 yLoc = 0; 10118 } 10119 invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); 10120 } 10121 } else { 10122 // Double-invalidation is necessary to capture view's old and new areas 10123 invalidate(true); 10124 } 10125 10126 int width = mRight - mLeft; 10127 int oldHeight = mBottom - mTop; 10128 10129 mTop = top; 10130 if (mDisplayList != null) { 10131 mDisplayList.setTop(mTop); 10132 } 10133 10134 sizeChange(width, mBottom - mTop, width, oldHeight); 10135 10136 if (!matrixIsIdentity) { 10137 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 10138 // A change in dimension means an auto-centered pivot point changes, too 10139 mTransformationInfo.mMatrixDirty = true; 10140 } 10141 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10142 invalidate(true); 10143 } 10144 mBackgroundSizeChanged = true; 10145 invalidateParentIfNeeded(); 10146 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10147 // View was rejected last time it was drawn by its parent; this may have changed 10148 invalidateParentIfNeeded(); 10149 } 10150 } 10151 } 10152 10153 /** 10154 * Bottom position of this view relative to its parent. 10155 * 10156 * @return The bottom of this view, in pixels. 10157 */ 10158 @ViewDebug.CapturedViewProperty 10159 public final int getBottom() { 10160 return mBottom; 10161 } 10162 10163 /** 10164 * True if this view has changed since the last time being drawn. 10165 * 10166 * @return The dirty state of this view. 10167 */ 10168 public boolean isDirty() { 10169 return (mPrivateFlags & PFLAG_DIRTY_MASK) != 0; 10170 } 10171 10172 /** 10173 * Sets the bottom position of this view relative to its parent. This method is meant to be 10174 * called by the layout system and should not generally be called otherwise, because the 10175 * property may be changed at any time by the layout. 10176 * 10177 * @param bottom The bottom of this view, in pixels. 10178 */ 10179 public final void setBottom(int bottom) { 10180 if (bottom != mBottom) { 10181 updateMatrix(); 10182 final boolean matrixIsIdentity = mTransformationInfo == null 10183 || mTransformationInfo.mMatrixIsIdentity; 10184 if (matrixIsIdentity) { 10185 if (mAttachInfo != null) { 10186 int maxBottom; 10187 if (bottom < mBottom) { 10188 maxBottom = mBottom; 10189 } else { 10190 maxBottom = bottom; 10191 } 10192 invalidate(0, 0, mRight - mLeft, maxBottom - mTop); 10193 } 10194 } else { 10195 // Double-invalidation is necessary to capture view's old and new areas 10196 invalidate(true); 10197 } 10198 10199 int width = mRight - mLeft; 10200 int oldHeight = mBottom - mTop; 10201 10202 mBottom = bottom; 10203 if (mDisplayList != null) { 10204 mDisplayList.setBottom(mBottom); 10205 } 10206 10207 sizeChange(width, mBottom - mTop, width, oldHeight); 10208 10209 if (!matrixIsIdentity) { 10210 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 10211 // A change in dimension means an auto-centered pivot point changes, too 10212 mTransformationInfo.mMatrixDirty = true; 10213 } 10214 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10215 invalidate(true); 10216 } 10217 mBackgroundSizeChanged = true; 10218 invalidateParentIfNeeded(); 10219 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10220 // View was rejected last time it was drawn by its parent; this may have changed 10221 invalidateParentIfNeeded(); 10222 } 10223 } 10224 } 10225 10226 /** 10227 * Left position of this view relative to its parent. 10228 * 10229 * @return The left edge of this view, in pixels. 10230 */ 10231 @ViewDebug.CapturedViewProperty 10232 public final int getLeft() { 10233 return mLeft; 10234 } 10235 10236 /** 10237 * Sets the left position of this view relative to its parent. This method is meant to be called 10238 * by the layout system and should not generally be called otherwise, because the property 10239 * may be changed at any time by the layout. 10240 * 10241 * @param left The bottom of this view, in pixels. 10242 */ 10243 public final void setLeft(int left) { 10244 if (left != mLeft) { 10245 updateMatrix(); 10246 final boolean matrixIsIdentity = mTransformationInfo == null 10247 || mTransformationInfo.mMatrixIsIdentity; 10248 if (matrixIsIdentity) { 10249 if (mAttachInfo != null) { 10250 int minLeft; 10251 int xLoc; 10252 if (left < mLeft) { 10253 minLeft = left; 10254 xLoc = left - mLeft; 10255 } else { 10256 minLeft = mLeft; 10257 xLoc = 0; 10258 } 10259 invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); 10260 } 10261 } else { 10262 // Double-invalidation is necessary to capture view's old and new areas 10263 invalidate(true); 10264 } 10265 10266 int oldWidth = mRight - mLeft; 10267 int height = mBottom - mTop; 10268 10269 mLeft = left; 10270 if (mDisplayList != null) { 10271 mDisplayList.setLeft(left); 10272 } 10273 10274 sizeChange(mRight - mLeft, height, oldWidth, height); 10275 10276 if (!matrixIsIdentity) { 10277 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 10278 // A change in dimension means an auto-centered pivot point changes, too 10279 mTransformationInfo.mMatrixDirty = true; 10280 } 10281 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10282 invalidate(true); 10283 } 10284 mBackgroundSizeChanged = true; 10285 invalidateParentIfNeeded(); 10286 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10287 // View was rejected last time it was drawn by its parent; this may have changed 10288 invalidateParentIfNeeded(); 10289 } 10290 } 10291 } 10292 10293 /** 10294 * Right position of this view relative to its parent. 10295 * 10296 * @return The right edge of this view, in pixels. 10297 */ 10298 @ViewDebug.CapturedViewProperty 10299 public final int getRight() { 10300 return mRight; 10301 } 10302 10303 /** 10304 * Sets the right position of this view relative to its parent. This method is meant to be called 10305 * by the layout system and should not generally be called otherwise, because the property 10306 * may be changed at any time by the layout. 10307 * 10308 * @param right The bottom of this view, in pixels. 10309 */ 10310 public final void setRight(int right) { 10311 if (right != mRight) { 10312 updateMatrix(); 10313 final boolean matrixIsIdentity = mTransformationInfo == null 10314 || mTransformationInfo.mMatrixIsIdentity; 10315 if (matrixIsIdentity) { 10316 if (mAttachInfo != null) { 10317 int maxRight; 10318 if (right < mRight) { 10319 maxRight = mRight; 10320 } else { 10321 maxRight = right; 10322 } 10323 invalidate(0, 0, maxRight - mLeft, mBottom - mTop); 10324 } 10325 } else { 10326 // Double-invalidation is necessary to capture view's old and new areas 10327 invalidate(true); 10328 } 10329 10330 int oldWidth = mRight - mLeft; 10331 int height = mBottom - mTop; 10332 10333 mRight = right; 10334 if (mDisplayList != null) { 10335 mDisplayList.setRight(mRight); 10336 } 10337 10338 sizeChange(mRight - mLeft, height, oldWidth, height); 10339 10340 if (!matrixIsIdentity) { 10341 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 10342 // A change in dimension means an auto-centered pivot point changes, too 10343 mTransformationInfo.mMatrixDirty = true; 10344 } 10345 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10346 invalidate(true); 10347 } 10348 mBackgroundSizeChanged = true; 10349 invalidateParentIfNeeded(); 10350 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10351 // View was rejected last time it was drawn by its parent; this may have changed 10352 invalidateParentIfNeeded(); 10353 } 10354 } 10355 } 10356 10357 /** 10358 * The visual x position of this view, in pixels. This is equivalent to the 10359 * {@link #setTranslationX(float) translationX} property plus the current 10360 * {@link #getLeft() left} property. 10361 * 10362 * @return The visual x position of this view, in pixels. 10363 */ 10364 @ViewDebug.ExportedProperty(category = "drawing") 10365 public float getX() { 10366 return mLeft + (mTransformationInfo != null ? mTransformationInfo.mTranslationX : 0); 10367 } 10368 10369 /** 10370 * Sets the visual x position of this view, in pixels. This is equivalent to setting the 10371 * {@link #setTranslationX(float) translationX} property to be the difference between 10372 * the x value passed in and the current {@link #getLeft() left} property. 10373 * 10374 * @param x The visual x position of this view, in pixels. 10375 */ 10376 public void setX(float x) { 10377 setTranslationX(x - mLeft); 10378 } 10379 10380 /** 10381 * The visual y position of this view, in pixels. This is equivalent to the 10382 * {@link #setTranslationY(float) translationY} property plus the current 10383 * {@link #getTop() top} property. 10384 * 10385 * @return The visual y position of this view, in pixels. 10386 */ 10387 @ViewDebug.ExportedProperty(category = "drawing") 10388 public float getY() { 10389 return mTop + (mTransformationInfo != null ? mTransformationInfo.mTranslationY : 0); 10390 } 10391 10392 /** 10393 * Sets the visual y position of this view, in pixels. This is equivalent to setting the 10394 * {@link #setTranslationY(float) translationY} property to be the difference between 10395 * the y value passed in and the current {@link #getTop() top} property. 10396 * 10397 * @param y The visual y position of this view, in pixels. 10398 */ 10399 public void setY(float y) { 10400 setTranslationY(y - mTop); 10401 } 10402 10403 10404 /** 10405 * The horizontal location of this view relative to its {@link #getLeft() left} position. 10406 * This position is post-layout, in addition to wherever the object's 10407 * layout placed it. 10408 * 10409 * @return The horizontal position of this view relative to its left position, in pixels. 10410 */ 10411 @ViewDebug.ExportedProperty(category = "drawing") 10412 public float getTranslationX() { 10413 return mTransformationInfo != null ? mTransformationInfo.mTranslationX : 0; 10414 } 10415 10416 /** 10417 * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. 10418 * This effectively positions the object post-layout, in addition to wherever the object's 10419 * layout placed it. 10420 * 10421 * @param translationX The horizontal position of this view relative to its left position, 10422 * in pixels. 10423 * 10424 * @attr ref android.R.styleable#View_translationX 10425 */ 10426 public void setTranslationX(float translationX) { 10427 ensureTransformationInfo(); 10428 final TransformationInfo info = mTransformationInfo; 10429 if (info.mTranslationX != translationX) { 10430 // Double-invalidation is necessary to capture view's old and new areas 10431 invalidateViewProperty(true, false); 10432 info.mTranslationX = translationX; 10433 info.mMatrixDirty = true; 10434 invalidateViewProperty(false, true); 10435 if (mDisplayList != null) { 10436 mDisplayList.setTranslationX(translationX); 10437 } 10438 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10439 // View was rejected last time it was drawn by its parent; this may have changed 10440 invalidateParentIfNeeded(); 10441 } 10442 } 10443 } 10444 10445 /** 10446 * The vertical location of this view relative to its {@link #getTop() top} position. 10447 * This position is post-layout, in addition to wherever the object's 10448 * layout placed it. 10449 * 10450 * @return The vertical position of this view relative to its top position, 10451 * in pixels. 10452 */ 10453 @ViewDebug.ExportedProperty(category = "drawing") 10454 public float getTranslationY() { 10455 return mTransformationInfo != null ? mTransformationInfo.mTranslationY : 0; 10456 } 10457 10458 /** 10459 * Sets the vertical location of this view relative to its {@link #getTop() top} position. 10460 * This effectively positions the object post-layout, in addition to wherever the object's 10461 * layout placed it. 10462 * 10463 * @param translationY The vertical position of this view relative to its top position, 10464 * in pixels. 10465 * 10466 * @attr ref android.R.styleable#View_translationY 10467 */ 10468 public void setTranslationY(float translationY) { 10469 ensureTransformationInfo(); 10470 final TransformationInfo info = mTransformationInfo; 10471 if (info.mTranslationY != translationY) { 10472 invalidateViewProperty(true, false); 10473 info.mTranslationY = translationY; 10474 info.mMatrixDirty = true; 10475 invalidateViewProperty(false, true); 10476 if (mDisplayList != null) { 10477 mDisplayList.setTranslationY(translationY); 10478 } 10479 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 10480 // View was rejected last time it was drawn by its parent; this may have changed 10481 invalidateParentIfNeeded(); 10482 } 10483 } 10484 } 10485 10486 /** 10487 * Hit rectangle in parent's coordinates 10488 * 10489 * @param outRect The hit rectangle of the view. 10490 */ 10491 public void getHitRect(Rect outRect) { 10492 updateMatrix(); 10493 final TransformationInfo info = mTransformationInfo; 10494 if (info == null || info.mMatrixIsIdentity || mAttachInfo == null) { 10495 outRect.set(mLeft, mTop, mRight, mBottom); 10496 } else { 10497 final RectF tmpRect = mAttachInfo.mTmpTransformRect; 10498 tmpRect.set(0, 0, getWidth(), getHeight()); 10499 info.mMatrix.mapRect(tmpRect); 10500 outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, 10501 (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); 10502 } 10503 } 10504 10505 /** 10506 * Determines whether the given point, in local coordinates is inside the view. 10507 */ 10508 /*package*/ final boolean pointInView(float localX, float localY) { 10509 return localX >= 0 && localX < (mRight - mLeft) 10510 && localY >= 0 && localY < (mBottom - mTop); 10511 } 10512 10513 /** 10514 * Utility method to determine whether the given point, in local coordinates, 10515 * is inside the view, where the area of the view is expanded by the slop factor. 10516 * This method is called while processing touch-move events to determine if the event 10517 * is still within the view. 10518 * 10519 * @hide 10520 */ 10521 public boolean pointInView(float localX, float localY, float slop) { 10522 return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && 10523 localY < ((mBottom - mTop) + slop); 10524 } 10525 10526 /** 10527 * When a view has focus and the user navigates away from it, the next view is searched for 10528 * starting from the rectangle filled in by this method. 10529 * 10530 * By default, the rectangle is the {@link #getDrawingRect(android.graphics.Rect)}) 10531 * of the view. However, if your view maintains some idea of internal selection, 10532 * such as a cursor, or a selected row or column, you should override this method and 10533 * fill in a more specific rectangle. 10534 * 10535 * @param r The rectangle to fill in, in this view's coordinates. 10536 */ 10537 public void getFocusedRect(Rect r) { 10538 getDrawingRect(r); 10539 } 10540 10541 /** 10542 * If some part of this view is not clipped by any of its parents, then 10543 * return that area in r in global (root) coordinates. To convert r to local 10544 * coordinates (without taking possible View rotations into account), offset 10545 * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). 10546 * If the view is completely clipped or translated out, return false. 10547 * 10548 * @param r If true is returned, r holds the global coordinates of the 10549 * visible portion of this view. 10550 * @param globalOffset If true is returned, globalOffset holds the dx,dy 10551 * between this view and its root. globalOffet may be null. 10552 * @return true if r is non-empty (i.e. part of the view is visible at the 10553 * root level. 10554 */ 10555 public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { 10556 int width = mRight - mLeft; 10557 int height = mBottom - mTop; 10558 if (width > 0 && height > 0) { 10559 r.set(0, 0, width, height); 10560 if (globalOffset != null) { 10561 globalOffset.set(-mScrollX, -mScrollY); 10562 } 10563 return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); 10564 } 10565 return false; 10566 } 10567 10568 public final boolean getGlobalVisibleRect(Rect r) { 10569 return getGlobalVisibleRect(r, null); 10570 } 10571 10572 public final boolean getLocalVisibleRect(Rect r) { 10573 final Point offset = mAttachInfo != null ? mAttachInfo.mPoint : new Point(); 10574 if (getGlobalVisibleRect(r, offset)) { 10575 r.offset(-offset.x, -offset.y); // make r local 10576 return true; 10577 } 10578 return false; 10579 } 10580 10581 /** 10582 * Offset this view's vertical location by the specified number of pixels. 10583 * 10584 * @param offset the number of pixels to offset the view by 10585 */ 10586 public void offsetTopAndBottom(int offset) { 10587 if (offset != 0) { 10588 updateMatrix(); 10589 final boolean matrixIsIdentity = mTransformationInfo == null 10590 || mTransformationInfo.mMatrixIsIdentity; 10591 if (matrixIsIdentity) { 10592 if (mDisplayList != null) { 10593 invalidateViewProperty(false, false); 10594 } else { 10595 final ViewParent p = mParent; 10596 if (p != null && mAttachInfo != null) { 10597 final Rect r = mAttachInfo.mTmpInvalRect; 10598 int minTop; 10599 int maxBottom; 10600 int yLoc; 10601 if (offset < 0) { 10602 minTop = mTop + offset; 10603 maxBottom = mBottom; 10604 yLoc = offset; 10605 } else { 10606 minTop = mTop; 10607 maxBottom = mBottom + offset; 10608 yLoc = 0; 10609 } 10610 r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); 10611 p.invalidateChild(this, r); 10612 } 10613 } 10614 } else { 10615 invalidateViewProperty(false, false); 10616 } 10617 10618 mTop += offset; 10619 mBottom += offset; 10620 if (mDisplayList != null) { 10621 mDisplayList.offsetTopAndBottom(offset); 10622 invalidateViewProperty(false, false); 10623 } else { 10624 if (!matrixIsIdentity) { 10625 invalidateViewProperty(false, true); 10626 } 10627 invalidateParentIfNeeded(); 10628 } 10629 } 10630 } 10631 10632 /** 10633 * Offset this view's horizontal location by the specified amount of pixels. 10634 * 10635 * @param offset the number of pixels to offset the view by 10636 */ 10637 public void offsetLeftAndRight(int offset) { 10638 if (offset != 0) { 10639 updateMatrix(); 10640 final boolean matrixIsIdentity = mTransformationInfo == null 10641 || mTransformationInfo.mMatrixIsIdentity; 10642 if (matrixIsIdentity) { 10643 if (mDisplayList != null) { 10644 invalidateViewProperty(false, false); 10645 } else { 10646 final ViewParent p = mParent; 10647 if (p != null && mAttachInfo != null) { 10648 final Rect r = mAttachInfo.mTmpInvalRect; 10649 int minLeft; 10650 int maxRight; 10651 if (offset < 0) { 10652 minLeft = mLeft + offset; 10653 maxRight = mRight; 10654 } else { 10655 minLeft = mLeft; 10656 maxRight = mRight + offset; 10657 } 10658 r.set(0, 0, maxRight - minLeft, mBottom - mTop); 10659 p.invalidateChild(this, r); 10660 } 10661 } 10662 } else { 10663 invalidateViewProperty(false, false); 10664 } 10665 10666 mLeft += offset; 10667 mRight += offset; 10668 if (mDisplayList != null) { 10669 mDisplayList.offsetLeftAndRight(offset); 10670 invalidateViewProperty(false, false); 10671 } else { 10672 if (!matrixIsIdentity) { 10673 invalidateViewProperty(false, true); 10674 } 10675 invalidateParentIfNeeded(); 10676 } 10677 } 10678 } 10679 10680 /** 10681 * Get the LayoutParams associated with this view. All views should have 10682 * layout parameters. These supply parameters to the <i>parent</i> of this 10683 * view specifying how it should be arranged. There are many subclasses of 10684 * ViewGroup.LayoutParams, and these correspond to the different subclasses 10685 * of ViewGroup that are responsible for arranging their children. 10686 * 10687 * This method may return null if this View is not attached to a parent 10688 * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} 10689 * was not invoked successfully. When a View is attached to a parent 10690 * ViewGroup, this method must not return null. 10691 * 10692 * @return The LayoutParams associated with this view, or null if no 10693 * parameters have been set yet 10694 */ 10695 @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") 10696 public ViewGroup.LayoutParams getLayoutParams() { 10697 return mLayoutParams; 10698 } 10699 10700 /** 10701 * Set the layout parameters associated with this view. These supply 10702 * parameters to the <i>parent</i> of this view specifying how it should be 10703 * arranged. There are many subclasses of ViewGroup.LayoutParams, and these 10704 * correspond to the different subclasses of ViewGroup that are responsible 10705 * for arranging their children. 10706 * 10707 * @param params The layout parameters for this view, cannot be null 10708 */ 10709 public void setLayoutParams(ViewGroup.LayoutParams params) { 10710 if (params == null) { 10711 throw new NullPointerException("Layout parameters cannot be null"); 10712 } 10713 mLayoutParams = params; 10714 resolveLayoutParams(); 10715 if (mParent instanceof ViewGroup) { 10716 ((ViewGroup) mParent).onSetLayoutParams(this, params); 10717 } 10718 requestLayout(); 10719 } 10720 10721 /** 10722 * Resolve the layout parameters depending on the resolved layout direction 10723 * 10724 * @hide 10725 */ 10726 public void resolveLayoutParams() { 10727 if (mLayoutParams != null) { 10728 mLayoutParams.resolveLayoutDirection(getLayoutDirection()); 10729 } 10730 } 10731 10732 /** 10733 * Set the scrolled position of your view. This will cause a call to 10734 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10735 * invalidated. 10736 * @param x the x position to scroll to 10737 * @param y the y position to scroll to 10738 */ 10739 public void scrollTo(int x, int y) { 10740 if (mScrollX != x || mScrollY != y) { 10741 int oldX = mScrollX; 10742 int oldY = mScrollY; 10743 mScrollX = x; 10744 mScrollY = y; 10745 invalidateParentCaches(); 10746 onScrollChanged(mScrollX, mScrollY, oldX, oldY); 10747 if (!awakenScrollBars()) { 10748 postInvalidateOnAnimation(); 10749 } 10750 } 10751 } 10752 10753 /** 10754 * Move the scrolled position of your view. This will cause a call to 10755 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10756 * invalidated. 10757 * @param x the amount of pixels to scroll by horizontally 10758 * @param y the amount of pixels to scroll by vertically 10759 */ 10760 public void scrollBy(int x, int y) { 10761 scrollTo(mScrollX + x, mScrollY + y); 10762 } 10763 10764 /** 10765 * <p>Trigger the scrollbars to draw. When invoked this method starts an 10766 * animation to fade the scrollbars out after a default delay. If a subclass 10767 * provides animated scrolling, the start delay should equal the duration 10768 * of the scrolling animation.</p> 10769 * 10770 * <p>The animation starts only if at least one of the scrollbars is 10771 * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and 10772 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 10773 * this method returns true, and false otherwise. If the animation is 10774 * started, this method calls {@link #invalidate()}; in that case the 10775 * caller should not call {@link #invalidate()}.</p> 10776 * 10777 * <p>This method should be invoked every time a subclass directly updates 10778 * the scroll parameters.</p> 10779 * 10780 * <p>This method is automatically invoked by {@link #scrollBy(int, int)} 10781 * and {@link #scrollTo(int, int)}.</p> 10782 * 10783 * @return true if the animation is played, false otherwise 10784 * 10785 * @see #awakenScrollBars(int) 10786 * @see #scrollBy(int, int) 10787 * @see #scrollTo(int, int) 10788 * @see #isHorizontalScrollBarEnabled() 10789 * @see #isVerticalScrollBarEnabled() 10790 * @see #setHorizontalScrollBarEnabled(boolean) 10791 * @see #setVerticalScrollBarEnabled(boolean) 10792 */ 10793 protected boolean awakenScrollBars() { 10794 return mScrollCache != null && 10795 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); 10796 } 10797 10798 /** 10799 * Trigger the scrollbars to draw. 10800 * This method differs from awakenScrollBars() only in its default duration. 10801 * initialAwakenScrollBars() will show the scroll bars for longer than 10802 * usual to give the user more of a chance to notice them. 10803 * 10804 * @return true if the animation is played, false otherwise. 10805 */ 10806 private boolean initialAwakenScrollBars() { 10807 return mScrollCache != null && 10808 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); 10809 } 10810 10811 /** 10812 * <p> 10813 * Trigger the scrollbars to draw. When invoked this method starts an 10814 * animation to fade the scrollbars out after a fixed delay. If a subclass 10815 * provides animated scrolling, the start delay should equal the duration of 10816 * the scrolling animation. 10817 * </p> 10818 * 10819 * <p> 10820 * The animation starts only if at least one of the scrollbars is enabled, 10821 * as specified by {@link #isHorizontalScrollBarEnabled()} and 10822 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 10823 * this method returns true, and false otherwise. If the animation is 10824 * started, this method calls {@link #invalidate()}; in that case the caller 10825 * should not call {@link #invalidate()}. 10826 * </p> 10827 * 10828 * <p> 10829 * This method should be invoked everytime a subclass directly updates the 10830 * scroll parameters. 10831 * </p> 10832 * 10833 * @param startDelay the delay, in milliseconds, after which the animation 10834 * should start; when the delay is 0, the animation starts 10835 * immediately 10836 * @return true if the animation is played, false otherwise 10837 * 10838 * @see #scrollBy(int, int) 10839 * @see #scrollTo(int, int) 10840 * @see #isHorizontalScrollBarEnabled() 10841 * @see #isVerticalScrollBarEnabled() 10842 * @see #setHorizontalScrollBarEnabled(boolean) 10843 * @see #setVerticalScrollBarEnabled(boolean) 10844 */ 10845 protected boolean awakenScrollBars(int startDelay) { 10846 return awakenScrollBars(startDelay, true); 10847 } 10848 10849 /** 10850 * <p> 10851 * Trigger the scrollbars to draw. When invoked this method starts an 10852 * animation to fade the scrollbars out after a fixed delay. If a subclass 10853 * provides animated scrolling, the start delay should equal the duration of 10854 * the scrolling animation. 10855 * </p> 10856 * 10857 * <p> 10858 * The animation starts only if at least one of the scrollbars is enabled, 10859 * as specified by {@link #isHorizontalScrollBarEnabled()} and 10860 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 10861 * this method returns true, and false otherwise. If the animation is 10862 * started, this method calls {@link #invalidate()} if the invalidate parameter 10863 * is set to true; in that case the caller 10864 * should not call {@link #invalidate()}. 10865 * </p> 10866 * 10867 * <p> 10868 * This method should be invoked everytime a subclass directly updates the 10869 * scroll parameters. 10870 * </p> 10871 * 10872 * @param startDelay the delay, in milliseconds, after which the animation 10873 * should start; when the delay is 0, the animation starts 10874 * immediately 10875 * 10876 * @param invalidate Wheter this method should call invalidate 10877 * 10878 * @return true if the animation is played, false otherwise 10879 * 10880 * @see #scrollBy(int, int) 10881 * @see #scrollTo(int, int) 10882 * @see #isHorizontalScrollBarEnabled() 10883 * @see #isVerticalScrollBarEnabled() 10884 * @see #setHorizontalScrollBarEnabled(boolean) 10885 * @see #setVerticalScrollBarEnabled(boolean) 10886 */ 10887 protected boolean awakenScrollBars(int startDelay, boolean invalidate) { 10888 final ScrollabilityCache scrollCache = mScrollCache; 10889 10890 if (scrollCache == null || !scrollCache.fadeScrollBars) { 10891 return false; 10892 } 10893 10894 if (scrollCache.scrollBar == null) { 10895 scrollCache.scrollBar = new ScrollBarDrawable(); 10896 } 10897 10898 if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { 10899 10900 if (invalidate) { 10901 // Invalidate to show the scrollbars 10902 postInvalidateOnAnimation(); 10903 } 10904 10905 if (scrollCache.state == ScrollabilityCache.OFF) { 10906 // FIXME: this is copied from WindowManagerService. 10907 // We should get this value from the system when it 10908 // is possible to do so. 10909 final int KEY_REPEAT_FIRST_DELAY = 750; 10910 startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); 10911 } 10912 10913 // Tell mScrollCache when we should start fading. This may 10914 // extend the fade start time if one was already scheduled 10915 long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; 10916 scrollCache.fadeStartTime = fadeStartTime; 10917 scrollCache.state = ScrollabilityCache.ON; 10918 10919 // Schedule our fader to run, unscheduling any old ones first 10920 if (mAttachInfo != null) { 10921 mAttachInfo.mHandler.removeCallbacks(scrollCache); 10922 mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); 10923 } 10924 10925 return true; 10926 } 10927 10928 return false; 10929 } 10930 10931 /** 10932 * Do not invalidate views which are not visible and which are not running an animation. They 10933 * will not get drawn and they should not set dirty flags as if they will be drawn 10934 */ 10935 private boolean skipInvalidate() { 10936 return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && 10937 (!(mParent instanceof ViewGroup) || 10938 !((ViewGroup) mParent).isViewTransitioning(this)); 10939 } 10940 /** 10941 * Mark the area defined by dirty as needing to be drawn. If the view is 10942 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some point 10943 * in the future. This must be called from a UI thread. To call from a non-UI 10944 * thread, call {@link #postInvalidate()}. 10945 * 10946 * WARNING: This method is destructive to dirty. 10947 * @param dirty the rectangle representing the bounds of the dirty region 10948 */ 10949 public void invalidate(Rect dirty) { 10950 if (skipInvalidate()) { 10951 return; 10952 } 10953 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) || 10954 (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID || 10955 (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED) { 10956 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10957 mPrivateFlags |= PFLAG_INVALIDATED; 10958 mPrivateFlags |= PFLAG_DIRTY; 10959 final ViewParent p = mParent; 10960 final AttachInfo ai = mAttachInfo; 10961 if (p != null && ai != null) { 10962 final int scrollX = mScrollX; 10963 final int scrollY = mScrollY; 10964 final Rect r = ai.mTmpInvalRect; 10965 r.set(dirty.left - scrollX, dirty.top - scrollY, 10966 dirty.right - scrollX, dirty.bottom - scrollY); 10967 mParent.invalidateChild(this, r); 10968 } 10969 } 10970 } 10971 10972 /** 10973 * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. 10974 * The coordinates of the dirty rect are relative to the view. 10975 * If the view is visible, {@link #onDraw(android.graphics.Canvas)} 10976 * will be called at some point in the future. This must be called from 10977 * a UI thread. To call from a non-UI thread, call {@link #postInvalidate()}. 10978 * @param l the left position of the dirty region 10979 * @param t the top position of the dirty region 10980 * @param r the right position of the dirty region 10981 * @param b the bottom position of the dirty region 10982 */ 10983 public void invalidate(int l, int t, int r, int b) { 10984 if (skipInvalidate()) { 10985 return; 10986 } 10987 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) || 10988 (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID || 10989 (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED) { 10990 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10991 mPrivateFlags |= PFLAG_INVALIDATED; 10992 mPrivateFlags |= PFLAG_DIRTY; 10993 final ViewParent p = mParent; 10994 final AttachInfo ai = mAttachInfo; 10995 if (p != null && ai != null && l < r && t < b) { 10996 final int scrollX = mScrollX; 10997 final int scrollY = mScrollY; 10998 final Rect tmpr = ai.mTmpInvalRect; 10999 tmpr.set(l - scrollX, t - scrollY, r - scrollX, b - scrollY); 11000 p.invalidateChild(this, tmpr); 11001 } 11002 } 11003 } 11004 11005 /** 11006 * Invalidate the whole view. If the view is visible, 11007 * {@link #onDraw(android.graphics.Canvas)} will be called at some point in 11008 * the future. This must be called from a UI thread. To call from a non-UI thread, 11009 * call {@link #postInvalidate()}. 11010 */ 11011 public void invalidate() { 11012 invalidate(true); 11013 } 11014 11015 /** 11016 * This is where the invalidate() work actually happens. A full invalidate() 11017 * causes the drawing cache to be invalidated, but this function can be called with 11018 * invalidateCache set to false to skip that invalidation step for cases that do not 11019 * need it (for example, a component that remains at the same dimensions with the same 11020 * content). 11021 * 11022 * @param invalidateCache Whether the drawing cache for this view should be invalidated as 11023 * well. This is usually true for a full invalidate, but may be set to false if the 11024 * View's contents or dimensions have not changed. 11025 */ 11026 void invalidate(boolean invalidateCache) { 11027 if (skipInvalidate()) { 11028 return; 11029 } 11030 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) || 11031 (invalidateCache && (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID) || 11032 (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED || isOpaque() != mLastIsOpaque) { 11033 mLastIsOpaque = isOpaque(); 11034 mPrivateFlags &= ~PFLAG_DRAWN; 11035 mPrivateFlags |= PFLAG_DIRTY; 11036 if (invalidateCache) { 11037 mPrivateFlags |= PFLAG_INVALIDATED; 11038 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 11039 } 11040 final AttachInfo ai = mAttachInfo; 11041 final ViewParent p = mParent; 11042 11043 if (p != null && ai != null) { 11044 final Rect r = ai.mTmpInvalRect; 11045 r.set(0, 0, mRight - mLeft, mBottom - mTop); 11046 // Don't call invalidate -- we don't want to internally scroll 11047 // our own bounds 11048 p.invalidateChild(this, r); 11049 } 11050 } 11051 } 11052 11053 /** 11054 * Quick invalidation for View property changes (alpha, translationXY, etc.). We don't want to 11055 * set any flags or handle all of the cases handled by the default invalidation methods. 11056 * Instead, we just want to schedule a traversal in ViewRootImpl with the appropriate 11057 * dirty rect. This method calls into fast invalidation methods in ViewGroup that 11058 * walk up the hierarchy, transforming the dirty rect as necessary. 11059 * 11060 * The method also handles normal invalidation logic if display list properties are not 11061 * being used in this view. The invalidateParent and forceRedraw flags are used by that 11062 * backup approach, to handle these cases used in the various property-setting methods. 11063 * 11064 * @param invalidateParent Force a call to invalidateParentCaches() if display list properties 11065 * are not being used in this view 11066 * @param forceRedraw Mark the view as DRAWN to force the invalidation to propagate, if display 11067 * list properties are not being used in this view 11068 */ 11069 void invalidateViewProperty(boolean invalidateParent, boolean forceRedraw) { 11070 if (mDisplayList == null || (mPrivateFlags & PFLAG_DRAW_ANIMATION) == PFLAG_DRAW_ANIMATION) { 11071 if (invalidateParent) { 11072 invalidateParentCaches(); 11073 } 11074 if (forceRedraw) { 11075 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11076 } 11077 invalidate(false); 11078 } else { 11079 final AttachInfo ai = mAttachInfo; 11080 final ViewParent p = mParent; 11081 if (p != null && ai != null) { 11082 final Rect r = ai.mTmpInvalRect; 11083 r.set(0, 0, mRight - mLeft, mBottom - mTop); 11084 if (mParent instanceof ViewGroup) { 11085 ((ViewGroup) mParent).invalidateChildFast(this, r); 11086 } else { 11087 mParent.invalidateChild(this, r); 11088 } 11089 } 11090 } 11091 } 11092 11093 /** 11094 * Utility method to transform a given Rect by the current matrix of this view. 11095 */ 11096 void transformRect(final Rect rect) { 11097 if (!getMatrix().isIdentity()) { 11098 RectF boundingRect = mAttachInfo.mTmpTransformRect; 11099 boundingRect.set(rect); 11100 getMatrix().mapRect(boundingRect); 11101 rect.set((int) Math.floor(boundingRect.left), 11102 (int) Math.floor(boundingRect.top), 11103 (int) Math.ceil(boundingRect.right), 11104 (int) Math.ceil(boundingRect.bottom)); 11105 } 11106 } 11107 11108 /** 11109 * Used to indicate that the parent of this view should clear its caches. This functionality 11110 * is used to force the parent to rebuild its display list (when hardware-accelerated), 11111 * which is necessary when various parent-managed properties of the view change, such as 11112 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only 11113 * clears the parent caches and does not causes an invalidate event. 11114 * 11115 * @hide 11116 */ 11117 protected void invalidateParentCaches() { 11118 if (mParent instanceof View) { 11119 ((View) mParent).mPrivateFlags |= PFLAG_INVALIDATED; 11120 } 11121 } 11122 11123 /** 11124 * Used to indicate that the parent of this view should be invalidated. This functionality 11125 * is used to force the parent to rebuild its display list (when hardware-accelerated), 11126 * which is necessary when various parent-managed properties of the view change, such as 11127 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate 11128 * an invalidation event to the parent. 11129 * 11130 * @hide 11131 */ 11132 protected void invalidateParentIfNeeded() { 11133 if (isHardwareAccelerated() && mParent instanceof View) { 11134 ((View) mParent).invalidate(true); 11135 } 11136 } 11137 11138 /** 11139 * Indicates whether this View is opaque. An opaque View guarantees that it will 11140 * draw all the pixels overlapping its bounds using a fully opaque color. 11141 * 11142 * Subclasses of View should override this method whenever possible to indicate 11143 * whether an instance is opaque. Opaque Views are treated in a special way by 11144 * the View hierarchy, possibly allowing it to perform optimizations during 11145 * invalidate/draw passes. 11146 * 11147 * @return True if this View is guaranteed to be fully opaque, false otherwise. 11148 */ 11149 @ViewDebug.ExportedProperty(category = "drawing") 11150 public boolean isOpaque() { 11151 return (mPrivateFlags & PFLAG_OPAQUE_MASK) == PFLAG_OPAQUE_MASK && 11152 getFinalAlpha() >= 1.0f; 11153 } 11154 11155 /** 11156 * @hide 11157 */ 11158 protected void computeOpaqueFlags() { 11159 // Opaque if: 11160 // - Has a background 11161 // - Background is opaque 11162 // - Doesn't have scrollbars or scrollbars overlay 11163 11164 if (mBackground != null && mBackground.getOpacity() == PixelFormat.OPAQUE) { 11165 mPrivateFlags |= PFLAG_OPAQUE_BACKGROUND; 11166 } else { 11167 mPrivateFlags &= ~PFLAG_OPAQUE_BACKGROUND; 11168 } 11169 11170 final int flags = mViewFlags; 11171 if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || 11172 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY || 11173 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_OUTSIDE_OVERLAY) { 11174 mPrivateFlags |= PFLAG_OPAQUE_SCROLLBARS; 11175 } else { 11176 mPrivateFlags &= ~PFLAG_OPAQUE_SCROLLBARS; 11177 } 11178 } 11179 11180 /** 11181 * @hide 11182 */ 11183 protected boolean hasOpaqueScrollbars() { 11184 return (mPrivateFlags & PFLAG_OPAQUE_SCROLLBARS) == PFLAG_OPAQUE_SCROLLBARS; 11185 } 11186 11187 /** 11188 * @return A handler associated with the thread running the View. This 11189 * handler can be used to pump events in the UI events queue. 11190 */ 11191 public Handler getHandler() { 11192 final AttachInfo attachInfo = mAttachInfo; 11193 if (attachInfo != null) { 11194 return attachInfo.mHandler; 11195 } 11196 return null; 11197 } 11198 11199 /** 11200 * Gets the view root associated with the View. 11201 * @return The view root, or null if none. 11202 * @hide 11203 */ 11204 public ViewRootImpl getViewRootImpl() { 11205 if (mAttachInfo != null) { 11206 return mAttachInfo.mViewRootImpl; 11207 } 11208 return null; 11209 } 11210 11211 /** 11212 * <p>Causes the Runnable to be added to the message queue. 11213 * The runnable will be run on the user interface thread.</p> 11214 * 11215 * @param action The Runnable that will be executed. 11216 * 11217 * @return Returns true if the Runnable was successfully placed in to the 11218 * message queue. Returns false on failure, usually because the 11219 * looper processing the message queue is exiting. 11220 * 11221 * @see #postDelayed 11222 * @see #removeCallbacks 11223 */ 11224 public boolean post(Runnable action) { 11225 final AttachInfo attachInfo = mAttachInfo; 11226 if (attachInfo != null) { 11227 return attachInfo.mHandler.post(action); 11228 } 11229 // Assume that post will succeed later 11230 ViewRootImpl.getRunQueue().post(action); 11231 return true; 11232 } 11233 11234 /** 11235 * <p>Causes the Runnable to be added to the message queue, to be run 11236 * after the specified amount of time elapses. 11237 * The runnable will be run on the user interface thread.</p> 11238 * 11239 * @param action The Runnable that will be executed. 11240 * @param delayMillis The delay (in milliseconds) until the Runnable 11241 * will be executed. 11242 * 11243 * @return true if the Runnable was successfully placed in to the 11244 * message queue. Returns false on failure, usually because the 11245 * looper processing the message queue is exiting. Note that a 11246 * result of true does not mean the Runnable will be processed -- 11247 * if the looper is quit before the delivery time of the message 11248 * occurs then the message will be dropped. 11249 * 11250 * @see #post 11251 * @see #removeCallbacks 11252 */ 11253 public boolean postDelayed(Runnable action, long delayMillis) { 11254 final AttachInfo attachInfo = mAttachInfo; 11255 if (attachInfo != null) { 11256 return attachInfo.mHandler.postDelayed(action, delayMillis); 11257 } 11258 // Assume that post will succeed later 11259 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 11260 return true; 11261 } 11262 11263 /** 11264 * <p>Causes the Runnable to execute on the next animation time step. 11265 * The runnable will be run on the user interface thread.</p> 11266 * 11267 * @param action The Runnable that will be executed. 11268 * 11269 * @see #postOnAnimationDelayed 11270 * @see #removeCallbacks 11271 */ 11272 public void postOnAnimation(Runnable action) { 11273 final AttachInfo attachInfo = mAttachInfo; 11274 if (attachInfo != null) { 11275 attachInfo.mViewRootImpl.mChoreographer.postCallback( 11276 Choreographer.CALLBACK_ANIMATION, action, null); 11277 } else { 11278 // Assume that post will succeed later 11279 ViewRootImpl.getRunQueue().post(action); 11280 } 11281 } 11282 11283 /** 11284 * <p>Causes the Runnable to execute on the next animation time step, 11285 * after the specified amount of time elapses. 11286 * The runnable will be run on the user interface thread.</p> 11287 * 11288 * @param action The Runnable that will be executed. 11289 * @param delayMillis The delay (in milliseconds) until the Runnable 11290 * will be executed. 11291 * 11292 * @see #postOnAnimation 11293 * @see #removeCallbacks 11294 */ 11295 public void postOnAnimationDelayed(Runnable action, long delayMillis) { 11296 final AttachInfo attachInfo = mAttachInfo; 11297 if (attachInfo != null) { 11298 attachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 11299 Choreographer.CALLBACK_ANIMATION, action, null, delayMillis); 11300 } else { 11301 // Assume that post will succeed later 11302 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 11303 } 11304 } 11305 11306 /** 11307 * <p>Removes the specified Runnable from the message queue.</p> 11308 * 11309 * @param action The Runnable to remove from the message handling queue 11310 * 11311 * @return true if this view could ask the Handler to remove the Runnable, 11312 * false otherwise. When the returned value is true, the Runnable 11313 * may or may not have been actually removed from the message queue 11314 * (for instance, if the Runnable was not in the queue already.) 11315 * 11316 * @see #post 11317 * @see #postDelayed 11318 * @see #postOnAnimation 11319 * @see #postOnAnimationDelayed 11320 */ 11321 public boolean removeCallbacks(Runnable action) { 11322 if (action != null) { 11323 final AttachInfo attachInfo = mAttachInfo; 11324 if (attachInfo != null) { 11325 attachInfo.mHandler.removeCallbacks(action); 11326 attachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 11327 Choreographer.CALLBACK_ANIMATION, action, null); 11328 } 11329 // Assume that post will succeed later 11330 ViewRootImpl.getRunQueue().removeCallbacks(action); 11331 } 11332 return true; 11333 } 11334 11335 /** 11336 * <p>Cause an invalidate to happen on a subsequent cycle through the event loop. 11337 * Use this to invalidate the View from a non-UI thread.</p> 11338 * 11339 * <p>This method can be invoked from outside of the UI thread 11340 * only when this View is attached to a window.</p> 11341 * 11342 * @see #invalidate() 11343 * @see #postInvalidateDelayed(long) 11344 */ 11345 public void postInvalidate() { 11346 postInvalidateDelayed(0); 11347 } 11348 11349 /** 11350 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 11351 * through the event loop. Use this to invalidate the View from a non-UI thread.</p> 11352 * 11353 * <p>This method can be invoked from outside of the UI thread 11354 * only when this View is attached to a window.</p> 11355 * 11356 * @param left The left coordinate of the rectangle to invalidate. 11357 * @param top The top coordinate of the rectangle to invalidate. 11358 * @param right The right coordinate of the rectangle to invalidate. 11359 * @param bottom The bottom coordinate of the rectangle to invalidate. 11360 * 11361 * @see #invalidate(int, int, int, int) 11362 * @see #invalidate(Rect) 11363 * @see #postInvalidateDelayed(long, int, int, int, int) 11364 */ 11365 public void postInvalidate(int left, int top, int right, int bottom) { 11366 postInvalidateDelayed(0, left, top, right, bottom); 11367 } 11368 11369 /** 11370 * <p>Cause an invalidate to happen on a subsequent cycle through the event 11371 * loop. Waits for the specified amount of time.</p> 11372 * 11373 * <p>This method can be invoked from outside of the UI thread 11374 * only when this View is attached to a window.</p> 11375 * 11376 * @param delayMilliseconds the duration in milliseconds to delay the 11377 * invalidation by 11378 * 11379 * @see #invalidate() 11380 * @see #postInvalidate() 11381 */ 11382 public void postInvalidateDelayed(long delayMilliseconds) { 11383 // We try only with the AttachInfo because there's no point in invalidating 11384 // if we are not attached to our window 11385 final AttachInfo attachInfo = mAttachInfo; 11386 if (attachInfo != null) { 11387 attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); 11388 } 11389 } 11390 11391 /** 11392 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 11393 * through the event loop. Waits for the specified amount of time.</p> 11394 * 11395 * <p>This method can be invoked from outside of the UI thread 11396 * only when this View is attached to a window.</p> 11397 * 11398 * @param delayMilliseconds the duration in milliseconds to delay the 11399 * invalidation by 11400 * @param left The left coordinate of the rectangle to invalidate. 11401 * @param top The top coordinate of the rectangle to invalidate. 11402 * @param right The right coordinate of the rectangle to invalidate. 11403 * @param bottom The bottom coordinate of the rectangle to invalidate. 11404 * 11405 * @see #invalidate(int, int, int, int) 11406 * @see #invalidate(Rect) 11407 * @see #postInvalidate(int, int, int, int) 11408 */ 11409 public void postInvalidateDelayed(long delayMilliseconds, int left, int top, 11410 int right, int bottom) { 11411 11412 // We try only with the AttachInfo because there's no point in invalidating 11413 // if we are not attached to our window 11414 final AttachInfo attachInfo = mAttachInfo; 11415 if (attachInfo != null) { 11416 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 11417 info.target = this; 11418 info.left = left; 11419 info.top = top; 11420 info.right = right; 11421 info.bottom = bottom; 11422 11423 attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); 11424 } 11425 } 11426 11427 /** 11428 * <p>Cause an invalidate to happen on the next animation time step, typically the 11429 * next display frame.</p> 11430 * 11431 * <p>This method can be invoked from outside of the UI thread 11432 * only when this View is attached to a window.</p> 11433 * 11434 * @see #invalidate() 11435 */ 11436 public void postInvalidateOnAnimation() { 11437 // We try only with the AttachInfo because there's no point in invalidating 11438 // if we are not attached to our window 11439 final AttachInfo attachInfo = mAttachInfo; 11440 if (attachInfo != null) { 11441 attachInfo.mViewRootImpl.dispatchInvalidateOnAnimation(this); 11442 } 11443 } 11444 11445 /** 11446 * <p>Cause an invalidate of the specified area to happen on the next animation 11447 * time step, typically the next display frame.</p> 11448 * 11449 * <p>This method can be invoked from outside of the UI thread 11450 * only when this View is attached to a window.</p> 11451 * 11452 * @param left The left coordinate of the rectangle to invalidate. 11453 * @param top The top coordinate of the rectangle to invalidate. 11454 * @param right The right coordinate of the rectangle to invalidate. 11455 * @param bottom The bottom coordinate of the rectangle to invalidate. 11456 * 11457 * @see #invalidate(int, int, int, int) 11458 * @see #invalidate(Rect) 11459 */ 11460 public void postInvalidateOnAnimation(int left, int top, int right, int bottom) { 11461 // We try only with the AttachInfo because there's no point in invalidating 11462 // if we are not attached to our window 11463 final AttachInfo attachInfo = mAttachInfo; 11464 if (attachInfo != null) { 11465 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 11466 info.target = this; 11467 info.left = left; 11468 info.top = top; 11469 info.right = right; 11470 info.bottom = bottom; 11471 11472 attachInfo.mViewRootImpl.dispatchInvalidateRectOnAnimation(info); 11473 } 11474 } 11475 11476 /** 11477 * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. 11478 * This event is sent at most once every 11479 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. 11480 */ 11481 private void postSendViewScrolledAccessibilityEventCallback() { 11482 if (mSendViewScrolledAccessibilityEvent == null) { 11483 mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); 11484 } 11485 if (!mSendViewScrolledAccessibilityEvent.mIsPending) { 11486 mSendViewScrolledAccessibilityEvent.mIsPending = true; 11487 postDelayed(mSendViewScrolledAccessibilityEvent, 11488 ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); 11489 } 11490 } 11491 11492 /** 11493 * Called by a parent to request that a child update its values for mScrollX 11494 * and mScrollY if necessary. This will typically be done if the child is 11495 * animating a scroll using a {@link android.widget.Scroller Scroller} 11496 * object. 11497 */ 11498 public void computeScroll() { 11499 } 11500 11501 /** 11502 * <p>Indicate whether the horizontal edges are faded when the view is 11503 * scrolled horizontally.</p> 11504 * 11505 * @return true if the horizontal edges should are faded on scroll, false 11506 * otherwise 11507 * 11508 * @see #setHorizontalFadingEdgeEnabled(boolean) 11509 * 11510 * @attr ref android.R.styleable#View_requiresFadingEdge 11511 */ 11512 public boolean isHorizontalFadingEdgeEnabled() { 11513 return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; 11514 } 11515 11516 /** 11517 * <p>Define whether the horizontal edges should be faded when this view 11518 * is scrolled horizontally.</p> 11519 * 11520 * @param horizontalFadingEdgeEnabled true if the horizontal edges should 11521 * be faded when the view is scrolled 11522 * horizontally 11523 * 11524 * @see #isHorizontalFadingEdgeEnabled() 11525 * 11526 * @attr ref android.R.styleable#View_requiresFadingEdge 11527 */ 11528 public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { 11529 if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { 11530 if (horizontalFadingEdgeEnabled) { 11531 initScrollCache(); 11532 } 11533 11534 mViewFlags ^= FADING_EDGE_HORIZONTAL; 11535 } 11536 } 11537 11538 /** 11539 * <p>Indicate whether the vertical edges are faded when the view is 11540 * scrolled horizontally.</p> 11541 * 11542 * @return true if the vertical edges should are faded on scroll, false 11543 * otherwise 11544 * 11545 * @see #setVerticalFadingEdgeEnabled(boolean) 11546 * 11547 * @attr ref android.R.styleable#View_requiresFadingEdge 11548 */ 11549 public boolean isVerticalFadingEdgeEnabled() { 11550 return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; 11551 } 11552 11553 /** 11554 * <p>Define whether the vertical edges should be faded when this view 11555 * is scrolled vertically.</p> 11556 * 11557 * @param verticalFadingEdgeEnabled true if the vertical edges should 11558 * be faded when the view is scrolled 11559 * vertically 11560 * 11561 * @see #isVerticalFadingEdgeEnabled() 11562 * 11563 * @attr ref android.R.styleable#View_requiresFadingEdge 11564 */ 11565 public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { 11566 if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { 11567 if (verticalFadingEdgeEnabled) { 11568 initScrollCache(); 11569 } 11570 11571 mViewFlags ^= FADING_EDGE_VERTICAL; 11572 } 11573 } 11574 11575 /** 11576 * Returns the strength, or intensity, of the top faded edge. The strength is 11577 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 11578 * returns 0.0 or 1.0 but no value in between. 11579 * 11580 * Subclasses should override this method to provide a smoother fade transition 11581 * when scrolling occurs. 11582 * 11583 * @return the intensity of the top fade as a float between 0.0f and 1.0f 11584 */ 11585 protected float getTopFadingEdgeStrength() { 11586 return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; 11587 } 11588 11589 /** 11590 * Returns the strength, or intensity, of the bottom faded edge. The strength is 11591 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 11592 * returns 0.0 or 1.0 but no value in between. 11593 * 11594 * Subclasses should override this method to provide a smoother fade transition 11595 * when scrolling occurs. 11596 * 11597 * @return the intensity of the bottom fade as a float between 0.0f and 1.0f 11598 */ 11599 protected float getBottomFadingEdgeStrength() { 11600 return computeVerticalScrollOffset() + computeVerticalScrollExtent() < 11601 computeVerticalScrollRange() ? 1.0f : 0.0f; 11602 } 11603 11604 /** 11605 * Returns the strength, or intensity, of the left faded edge. The strength is 11606 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 11607 * returns 0.0 or 1.0 but no value in between. 11608 * 11609 * Subclasses should override this method to provide a smoother fade transition 11610 * when scrolling occurs. 11611 * 11612 * @return the intensity of the left fade as a float between 0.0f and 1.0f 11613 */ 11614 protected float getLeftFadingEdgeStrength() { 11615 return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; 11616 } 11617 11618 /** 11619 * Returns the strength, or intensity, of the right faded edge. The strength is 11620 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 11621 * returns 0.0 or 1.0 but no value in between. 11622 * 11623 * Subclasses should override this method to provide a smoother fade transition 11624 * when scrolling occurs. 11625 * 11626 * @return the intensity of the right fade as a float between 0.0f and 1.0f 11627 */ 11628 protected float getRightFadingEdgeStrength() { 11629 return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < 11630 computeHorizontalScrollRange() ? 1.0f : 0.0f; 11631 } 11632 11633 /** 11634 * <p>Indicate whether the horizontal scrollbar should be drawn or not. The 11635 * scrollbar is not drawn by default.</p> 11636 * 11637 * @return true if the horizontal scrollbar should be painted, false 11638 * otherwise 11639 * 11640 * @see #setHorizontalScrollBarEnabled(boolean) 11641 */ 11642 public boolean isHorizontalScrollBarEnabled() { 11643 return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 11644 } 11645 11646 /** 11647 * <p>Define whether the horizontal scrollbar should be drawn or not. The 11648 * scrollbar is not drawn by default.</p> 11649 * 11650 * @param horizontalScrollBarEnabled true if the horizontal scrollbar should 11651 * be painted 11652 * 11653 * @see #isHorizontalScrollBarEnabled() 11654 */ 11655 public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { 11656 if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { 11657 mViewFlags ^= SCROLLBARS_HORIZONTAL; 11658 computeOpaqueFlags(); 11659 resolvePadding(); 11660 } 11661 } 11662 11663 /** 11664 * <p>Indicate whether the vertical scrollbar should be drawn or not. The 11665 * scrollbar is not drawn by default.</p> 11666 * 11667 * @return true if the vertical scrollbar should be painted, false 11668 * otherwise 11669 * 11670 * @see #setVerticalScrollBarEnabled(boolean) 11671 */ 11672 public boolean isVerticalScrollBarEnabled() { 11673 return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; 11674 } 11675 11676 /** 11677 * <p>Define whether the vertical scrollbar should be drawn or not. The 11678 * scrollbar is not drawn by default.</p> 11679 * 11680 * @param verticalScrollBarEnabled true if the vertical scrollbar should 11681 * be painted 11682 * 11683 * @see #isVerticalScrollBarEnabled() 11684 */ 11685 public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { 11686 if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { 11687 mViewFlags ^= SCROLLBARS_VERTICAL; 11688 computeOpaqueFlags(); 11689 resolvePadding(); 11690 } 11691 } 11692 11693 /** 11694 * @hide 11695 */ 11696 protected void recomputePadding() { 11697 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 11698 } 11699 11700 /** 11701 * Define whether scrollbars will fade when the view is not scrolling. 11702 * 11703 * @param fadeScrollbars wheter to enable fading 11704 * 11705 * @attr ref android.R.styleable#View_fadeScrollbars 11706 */ 11707 public void setScrollbarFadingEnabled(boolean fadeScrollbars) { 11708 initScrollCache(); 11709 final ScrollabilityCache scrollabilityCache = mScrollCache; 11710 scrollabilityCache.fadeScrollBars = fadeScrollbars; 11711 if (fadeScrollbars) { 11712 scrollabilityCache.state = ScrollabilityCache.OFF; 11713 } else { 11714 scrollabilityCache.state = ScrollabilityCache.ON; 11715 } 11716 } 11717 11718 /** 11719 * 11720 * Returns true if scrollbars will fade when this view is not scrolling 11721 * 11722 * @return true if scrollbar fading is enabled 11723 * 11724 * @attr ref android.R.styleable#View_fadeScrollbars 11725 */ 11726 public boolean isScrollbarFadingEnabled() { 11727 return mScrollCache != null && mScrollCache.fadeScrollBars; 11728 } 11729 11730 /** 11731 * 11732 * Returns the delay before scrollbars fade. 11733 * 11734 * @return the delay before scrollbars fade 11735 * 11736 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 11737 */ 11738 public int getScrollBarDefaultDelayBeforeFade() { 11739 return mScrollCache == null ? ViewConfiguration.getScrollDefaultDelay() : 11740 mScrollCache.scrollBarDefaultDelayBeforeFade; 11741 } 11742 11743 /** 11744 * Define the delay before scrollbars fade. 11745 * 11746 * @param scrollBarDefaultDelayBeforeFade - the delay before scrollbars fade 11747 * 11748 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 11749 */ 11750 public void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) { 11751 getScrollCache().scrollBarDefaultDelayBeforeFade = scrollBarDefaultDelayBeforeFade; 11752 } 11753 11754 /** 11755 * 11756 * Returns the scrollbar fade duration. 11757 * 11758 * @return the scrollbar fade duration 11759 * 11760 * @attr ref android.R.styleable#View_scrollbarFadeDuration 11761 */ 11762 public int getScrollBarFadeDuration() { 11763 return mScrollCache == null ? ViewConfiguration.getScrollBarFadeDuration() : 11764 mScrollCache.scrollBarFadeDuration; 11765 } 11766 11767 /** 11768 * Define the scrollbar fade duration. 11769 * 11770 * @param scrollBarFadeDuration - the scrollbar fade duration 11771 * 11772 * @attr ref android.R.styleable#View_scrollbarFadeDuration 11773 */ 11774 public void setScrollBarFadeDuration(int scrollBarFadeDuration) { 11775 getScrollCache().scrollBarFadeDuration = scrollBarFadeDuration; 11776 } 11777 11778 /** 11779 * 11780 * Returns the scrollbar size. 11781 * 11782 * @return the scrollbar size 11783 * 11784 * @attr ref android.R.styleable#View_scrollbarSize 11785 */ 11786 public int getScrollBarSize() { 11787 return mScrollCache == null ? ViewConfiguration.get(mContext).getScaledScrollBarSize() : 11788 mScrollCache.scrollBarSize; 11789 } 11790 11791 /** 11792 * Define the scrollbar size. 11793 * 11794 * @param scrollBarSize - the scrollbar size 11795 * 11796 * @attr ref android.R.styleable#View_scrollbarSize 11797 */ 11798 public void setScrollBarSize(int scrollBarSize) { 11799 getScrollCache().scrollBarSize = scrollBarSize; 11800 } 11801 11802 /** 11803 * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or 11804 * inset. When inset, they add to the padding of the view. And the scrollbars 11805 * can be drawn inside the padding area or on the edge of the view. For example, 11806 * if a view has a background drawable and you want to draw the scrollbars 11807 * inside the padding specified by the drawable, you can use 11808 * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to 11809 * appear at the edge of the view, ignoring the padding, then you can use 11810 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> 11811 * @param style the style of the scrollbars. Should be one of 11812 * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, 11813 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. 11814 * @see #SCROLLBARS_INSIDE_OVERLAY 11815 * @see #SCROLLBARS_INSIDE_INSET 11816 * @see #SCROLLBARS_OUTSIDE_OVERLAY 11817 * @see #SCROLLBARS_OUTSIDE_INSET 11818 * 11819 * @attr ref android.R.styleable#View_scrollbarStyle 11820 */ 11821 public void setScrollBarStyle(@ScrollBarStyle int style) { 11822 if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { 11823 mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); 11824 computeOpaqueFlags(); 11825 resolvePadding(); 11826 } 11827 } 11828 11829 /** 11830 * <p>Returns the current scrollbar style.</p> 11831 * @return the current scrollbar style 11832 * @see #SCROLLBARS_INSIDE_OVERLAY 11833 * @see #SCROLLBARS_INSIDE_INSET 11834 * @see #SCROLLBARS_OUTSIDE_OVERLAY 11835 * @see #SCROLLBARS_OUTSIDE_INSET 11836 * 11837 * @attr ref android.R.styleable#View_scrollbarStyle 11838 */ 11839 @ViewDebug.ExportedProperty(mapping = { 11840 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), 11841 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), 11842 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), 11843 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") 11844 }) 11845 @ScrollBarStyle 11846 public int getScrollBarStyle() { 11847 return mViewFlags & SCROLLBARS_STYLE_MASK; 11848 } 11849 11850 /** 11851 * <p>Compute the horizontal range that the horizontal scrollbar 11852 * represents.</p> 11853 * 11854 * <p>The range is expressed in arbitrary units that must be the same as the 11855 * units used by {@link #computeHorizontalScrollExtent()} and 11856 * {@link #computeHorizontalScrollOffset()}.</p> 11857 * 11858 * <p>The default range is the drawing width of this view.</p> 11859 * 11860 * @return the total horizontal range represented by the horizontal 11861 * scrollbar 11862 * 11863 * @see #computeHorizontalScrollExtent() 11864 * @see #computeHorizontalScrollOffset() 11865 * @see android.widget.ScrollBarDrawable 11866 */ 11867 protected int computeHorizontalScrollRange() { 11868 return getWidth(); 11869 } 11870 11871 /** 11872 * <p>Compute the horizontal offset of the horizontal scrollbar's thumb 11873 * within the horizontal range. This value is used to compute the position 11874 * of the thumb within the scrollbar's track.</p> 11875 * 11876 * <p>The range is expressed in arbitrary units that must be the same as the 11877 * units used by {@link #computeHorizontalScrollRange()} and 11878 * {@link #computeHorizontalScrollExtent()}.</p> 11879 * 11880 * <p>The default offset is the scroll offset of this view.</p> 11881 * 11882 * @return the horizontal offset of the scrollbar's thumb 11883 * 11884 * @see #computeHorizontalScrollRange() 11885 * @see #computeHorizontalScrollExtent() 11886 * @see android.widget.ScrollBarDrawable 11887 */ 11888 protected int computeHorizontalScrollOffset() { 11889 return mScrollX; 11890 } 11891 11892 /** 11893 * <p>Compute the horizontal extent of the horizontal scrollbar's thumb 11894 * within the horizontal range. This value is used to compute the length 11895 * of the thumb within the scrollbar's track.</p> 11896 * 11897 * <p>The range is expressed in arbitrary units that must be the same as the 11898 * units used by {@link #computeHorizontalScrollRange()} and 11899 * {@link #computeHorizontalScrollOffset()}.</p> 11900 * 11901 * <p>The default extent is the drawing width of this view.</p> 11902 * 11903 * @return the horizontal extent of the scrollbar's thumb 11904 * 11905 * @see #computeHorizontalScrollRange() 11906 * @see #computeHorizontalScrollOffset() 11907 * @see android.widget.ScrollBarDrawable 11908 */ 11909 protected int computeHorizontalScrollExtent() { 11910 return getWidth(); 11911 } 11912 11913 /** 11914 * <p>Compute the vertical range that the vertical scrollbar represents.</p> 11915 * 11916 * <p>The range is expressed in arbitrary units that must be the same as the 11917 * units used by {@link #computeVerticalScrollExtent()} and 11918 * {@link #computeVerticalScrollOffset()}.</p> 11919 * 11920 * @return the total vertical range represented by the vertical scrollbar 11921 * 11922 * <p>The default range is the drawing height of this view.</p> 11923 * 11924 * @see #computeVerticalScrollExtent() 11925 * @see #computeVerticalScrollOffset() 11926 * @see android.widget.ScrollBarDrawable 11927 */ 11928 protected int computeVerticalScrollRange() { 11929 return getHeight(); 11930 } 11931 11932 /** 11933 * <p>Compute the vertical offset of the vertical scrollbar's thumb 11934 * within the horizontal range. This value is used to compute the position 11935 * of the thumb within the scrollbar's track.</p> 11936 * 11937 * <p>The range is expressed in arbitrary units that must be the same as the 11938 * units used by {@link #computeVerticalScrollRange()} and 11939 * {@link #computeVerticalScrollExtent()}.</p> 11940 * 11941 * <p>The default offset is the scroll offset of this view.</p> 11942 * 11943 * @return the vertical offset of the scrollbar's thumb 11944 * 11945 * @see #computeVerticalScrollRange() 11946 * @see #computeVerticalScrollExtent() 11947 * @see android.widget.ScrollBarDrawable 11948 */ 11949 protected int computeVerticalScrollOffset() { 11950 return mScrollY; 11951 } 11952 11953 /** 11954 * <p>Compute the vertical extent of the horizontal scrollbar's thumb 11955 * within the vertical range. This value is used to compute the length 11956 * of the thumb within the scrollbar's track.</p> 11957 * 11958 * <p>The range is expressed in arbitrary units that must be the same as the 11959 * units used by {@link #computeVerticalScrollRange()} and 11960 * {@link #computeVerticalScrollOffset()}.</p> 11961 * 11962 * <p>The default extent is the drawing height of this view.</p> 11963 * 11964 * @return the vertical extent of the scrollbar's thumb 11965 * 11966 * @see #computeVerticalScrollRange() 11967 * @see #computeVerticalScrollOffset() 11968 * @see android.widget.ScrollBarDrawable 11969 */ 11970 protected int computeVerticalScrollExtent() { 11971 return getHeight(); 11972 } 11973 11974 /** 11975 * Check if this view can be scrolled horizontally in a certain direction. 11976 * 11977 * @param direction Negative to check scrolling left, positive to check scrolling right. 11978 * @return true if this view can be scrolled in the specified direction, false otherwise. 11979 */ 11980 public boolean canScrollHorizontally(int direction) { 11981 final int offset = computeHorizontalScrollOffset(); 11982 final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); 11983 if (range == 0) return false; 11984 if (direction < 0) { 11985 return offset > 0; 11986 } else { 11987 return offset < range - 1; 11988 } 11989 } 11990 11991 /** 11992 * Check if this view can be scrolled vertically in a certain direction. 11993 * 11994 * @param direction Negative to check scrolling up, positive to check scrolling down. 11995 * @return true if this view can be scrolled in the specified direction, false otherwise. 11996 */ 11997 public boolean canScrollVertically(int direction) { 11998 final int offset = computeVerticalScrollOffset(); 11999 final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); 12000 if (range == 0) return false; 12001 if (direction < 0) { 12002 return offset > 0; 12003 } else { 12004 return offset < range - 1; 12005 } 12006 } 12007 12008 /** 12009 * <p>Request the drawing of the horizontal and the vertical scrollbar. The 12010 * scrollbars are painted only if they have been awakened first.</p> 12011 * 12012 * @param canvas the canvas on which to draw the scrollbars 12013 * 12014 * @see #awakenScrollBars(int) 12015 */ 12016 protected final void onDrawScrollBars(Canvas canvas) { 12017 // scrollbars are drawn only when the animation is running 12018 final ScrollabilityCache cache = mScrollCache; 12019 if (cache != null) { 12020 12021 int state = cache.state; 12022 12023 if (state == ScrollabilityCache.OFF) { 12024 return; 12025 } 12026 12027 boolean invalidate = false; 12028 12029 if (state == ScrollabilityCache.FADING) { 12030 // We're fading -- get our fade interpolation 12031 if (cache.interpolatorValues == null) { 12032 cache.interpolatorValues = new float[1]; 12033 } 12034 12035 float[] values = cache.interpolatorValues; 12036 12037 // Stops the animation if we're done 12038 if (cache.scrollBarInterpolator.timeToValues(values) == 12039 Interpolator.Result.FREEZE_END) { 12040 cache.state = ScrollabilityCache.OFF; 12041 } else { 12042 cache.scrollBar.setAlpha(Math.round(values[0])); 12043 } 12044 12045 // This will make the scroll bars inval themselves after 12046 // drawing. We only want this when we're fading so that 12047 // we prevent excessive redraws 12048 invalidate = true; 12049 } else { 12050 // We're just on -- but we may have been fading before so 12051 // reset alpha 12052 cache.scrollBar.setAlpha(255); 12053 } 12054 12055 12056 final int viewFlags = mViewFlags; 12057 12058 final boolean drawHorizontalScrollBar = 12059 (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 12060 final boolean drawVerticalScrollBar = 12061 (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL 12062 && !isVerticalScrollBarHidden(); 12063 12064 if (drawVerticalScrollBar || drawHorizontalScrollBar) { 12065 final int width = mRight - mLeft; 12066 final int height = mBottom - mTop; 12067 12068 final ScrollBarDrawable scrollBar = cache.scrollBar; 12069 12070 final int scrollX = mScrollX; 12071 final int scrollY = mScrollY; 12072 final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; 12073 12074 int left; 12075 int top; 12076 int right; 12077 int bottom; 12078 12079 if (drawHorizontalScrollBar) { 12080 int size = scrollBar.getSize(false); 12081 if (size <= 0) { 12082 size = cache.scrollBarSize; 12083 } 12084 12085 scrollBar.setParameters(computeHorizontalScrollRange(), 12086 computeHorizontalScrollOffset(), 12087 computeHorizontalScrollExtent(), false); 12088 final int verticalScrollBarGap = drawVerticalScrollBar ? 12089 getVerticalScrollbarWidth() : 0; 12090 top = scrollY + height - size - (mUserPaddingBottom & inside); 12091 left = scrollX + (mPaddingLeft & inside); 12092 right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; 12093 bottom = top + size; 12094 onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); 12095 if (invalidate) { 12096 invalidate(left, top, right, bottom); 12097 } 12098 } 12099 12100 if (drawVerticalScrollBar) { 12101 int size = scrollBar.getSize(true); 12102 if (size <= 0) { 12103 size = cache.scrollBarSize; 12104 } 12105 12106 scrollBar.setParameters(computeVerticalScrollRange(), 12107 computeVerticalScrollOffset(), 12108 computeVerticalScrollExtent(), true); 12109 int verticalScrollbarPosition = mVerticalScrollbarPosition; 12110 if (verticalScrollbarPosition == SCROLLBAR_POSITION_DEFAULT) { 12111 verticalScrollbarPosition = isLayoutRtl() ? 12112 SCROLLBAR_POSITION_LEFT : SCROLLBAR_POSITION_RIGHT; 12113 } 12114 switch (verticalScrollbarPosition) { 12115 default: 12116 case SCROLLBAR_POSITION_RIGHT: 12117 left = scrollX + width - size - (mUserPaddingRight & inside); 12118 break; 12119 case SCROLLBAR_POSITION_LEFT: 12120 left = scrollX + (mUserPaddingLeft & inside); 12121 break; 12122 } 12123 top = scrollY + (mPaddingTop & inside); 12124 right = left + size; 12125 bottom = scrollY + height - (mUserPaddingBottom & inside); 12126 onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); 12127 if (invalidate) { 12128 invalidate(left, top, right, bottom); 12129 } 12130 } 12131 } 12132 } 12133 } 12134 12135 /** 12136 * Override this if the vertical scrollbar needs to be hidden in a subclass, like when 12137 * FastScroller is visible. 12138 * @return whether to temporarily hide the vertical scrollbar 12139 * @hide 12140 */ 12141 protected boolean isVerticalScrollBarHidden() { 12142 return false; 12143 } 12144 12145 /** 12146 * <p>Draw the horizontal scrollbar if 12147 * {@link #isHorizontalScrollBarEnabled()} returns true.</p> 12148 * 12149 * @param canvas the canvas on which to draw the scrollbar 12150 * @param scrollBar the scrollbar's drawable 12151 * 12152 * @see #isHorizontalScrollBarEnabled() 12153 * @see #computeHorizontalScrollRange() 12154 * @see #computeHorizontalScrollExtent() 12155 * @see #computeHorizontalScrollOffset() 12156 * @see android.widget.ScrollBarDrawable 12157 * @hide 12158 */ 12159 protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, 12160 int l, int t, int r, int b) { 12161 scrollBar.setBounds(l, t, r, b); 12162 scrollBar.draw(canvas); 12163 } 12164 12165 /** 12166 * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} 12167 * returns true.</p> 12168 * 12169 * @param canvas the canvas on which to draw the scrollbar 12170 * @param scrollBar the scrollbar's drawable 12171 * 12172 * @see #isVerticalScrollBarEnabled() 12173 * @see #computeVerticalScrollRange() 12174 * @see #computeVerticalScrollExtent() 12175 * @see #computeVerticalScrollOffset() 12176 * @see android.widget.ScrollBarDrawable 12177 * @hide 12178 */ 12179 protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, 12180 int l, int t, int r, int b) { 12181 scrollBar.setBounds(l, t, r, b); 12182 scrollBar.draw(canvas); 12183 } 12184 12185 /** 12186 * Implement this to do your drawing. 12187 * 12188 * @param canvas the canvas on which the background will be drawn 12189 */ 12190 protected void onDraw(Canvas canvas) { 12191 } 12192 12193 /* 12194 * Caller is responsible for calling requestLayout if necessary. 12195 * (This allows addViewInLayout to not request a new layout.) 12196 */ 12197 void assignParent(ViewParent parent) { 12198 if (mParent == null) { 12199 mParent = parent; 12200 } else if (parent == null) { 12201 mParent = null; 12202 } else { 12203 throw new RuntimeException("view " + this + " being added, but" 12204 + " it already has a parent"); 12205 } 12206 } 12207 12208 /** 12209 * This is called when the view is attached to a window. At this point it 12210 * has a Surface and will start drawing. Note that this function is 12211 * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, 12212 * however it may be called any time before the first onDraw -- including 12213 * before or after {@link #onMeasure(int, int)}. 12214 * 12215 * @see #onDetachedFromWindow() 12216 */ 12217 protected void onAttachedToWindow() { 12218 if ((mPrivateFlags & PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 12219 mParent.requestTransparentRegion(this); 12220 } 12221 12222 if ((mPrivateFlags & PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH) != 0) { 12223 initialAwakenScrollBars(); 12224 mPrivateFlags &= ~PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH; 12225 } 12226 12227 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 12228 12229 jumpDrawablesToCurrentState(); 12230 12231 resetSubtreeAccessibilityStateChanged(); 12232 12233 if (isFocused()) { 12234 InputMethodManager imm = InputMethodManager.peekInstance(); 12235 imm.focusIn(this); 12236 } 12237 12238 if (mDisplayList != null) { 12239 mDisplayList.clearDirty(); 12240 } 12241 } 12242 12243 /** 12244 * Resolve all RTL related properties. 12245 * 12246 * @return true if resolution of RTL properties has been done 12247 * 12248 * @hide 12249 */ 12250 public boolean resolveRtlPropertiesIfNeeded() { 12251 if (!needRtlPropertiesResolution()) return false; 12252 12253 // Order is important here: LayoutDirection MUST be resolved first 12254 if (!isLayoutDirectionResolved()) { 12255 resolveLayoutDirection(); 12256 resolveLayoutParams(); 12257 } 12258 // ... then we can resolve the others properties depending on the resolved LayoutDirection. 12259 if (!isTextDirectionResolved()) { 12260 resolveTextDirection(); 12261 } 12262 if (!isTextAlignmentResolved()) { 12263 resolveTextAlignment(); 12264 } 12265 // Should resolve Drawables before Padding because we need the layout direction of the 12266 // Drawable to correctly resolve Padding. 12267 if (!isDrawablesResolved()) { 12268 resolveDrawables(); 12269 } 12270 if (!isPaddingResolved()) { 12271 resolvePadding(); 12272 } 12273 onRtlPropertiesChanged(getLayoutDirection()); 12274 return true; 12275 } 12276 12277 /** 12278 * Reset resolution of all RTL related properties. 12279 * 12280 * @hide 12281 */ 12282 public void resetRtlProperties() { 12283 resetResolvedLayoutDirection(); 12284 resetResolvedTextDirection(); 12285 resetResolvedTextAlignment(); 12286 resetResolvedPadding(); 12287 resetResolvedDrawables(); 12288 } 12289 12290 /** 12291 * @see #onScreenStateChanged(int) 12292 */ 12293 void dispatchScreenStateChanged(int screenState) { 12294 onScreenStateChanged(screenState); 12295 } 12296 12297 /** 12298 * This method is called whenever the state of the screen this view is 12299 * attached to changes. A state change will usually occurs when the screen 12300 * turns on or off (whether it happens automatically or the user does it 12301 * manually.) 12302 * 12303 * @param screenState The new state of the screen. Can be either 12304 * {@link #SCREEN_STATE_ON} or {@link #SCREEN_STATE_OFF} 12305 */ 12306 public void onScreenStateChanged(int screenState) { 12307 } 12308 12309 /** 12310 * Return true if the application tag in the AndroidManifest has set "supportRtl" to true 12311 */ 12312 private boolean hasRtlSupport() { 12313 return mContext.getApplicationInfo().hasRtlSupport(); 12314 } 12315 12316 /** 12317 * Return true if we are in RTL compatibility mode (either before Jelly Bean MR1 or 12318 * RTL not supported) 12319 */ 12320 private boolean isRtlCompatibilityMode() { 12321 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 12322 return targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport(); 12323 } 12324 12325 /** 12326 * @return true if RTL properties need resolution. 12327 * 12328 */ 12329 private boolean needRtlPropertiesResolution() { 12330 return (mPrivateFlags2 & ALL_RTL_PROPERTIES_RESOLVED) != ALL_RTL_PROPERTIES_RESOLVED; 12331 } 12332 12333 /** 12334 * Called when any RTL property (layout direction or text direction or text alignment) has 12335 * been changed. 12336 * 12337 * Subclasses need to override this method to take care of cached information that depends on the 12338 * resolved layout direction, or to inform child views that inherit their layout direction. 12339 * 12340 * The default implementation does nothing. 12341 * 12342 * @param layoutDirection the direction of the layout 12343 * 12344 * @see #LAYOUT_DIRECTION_LTR 12345 * @see #LAYOUT_DIRECTION_RTL 12346 */ 12347 public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { 12348 } 12349 12350 /** 12351 * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing 12352 * that the parent directionality can and will be resolved before its children. 12353 * 12354 * @return true if resolution has been done, false otherwise. 12355 * 12356 * @hide 12357 */ 12358 public boolean resolveLayoutDirection() { 12359 // Clear any previous layout direction resolution 12360 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 12361 12362 if (hasRtlSupport()) { 12363 // Set resolved depending on layout direction 12364 switch ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> 12365 PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) { 12366 case LAYOUT_DIRECTION_INHERIT: 12367 // We cannot resolve yet. LTR is by default and let the resolution happen again 12368 // later to get the correct resolved value 12369 if (!canResolveLayoutDirection()) return false; 12370 12371 // Parent has not yet resolved, LTR is still the default 12372 try { 12373 if (!mParent.isLayoutDirectionResolved()) return false; 12374 12375 if (mParent.getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 12376 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 12377 } 12378 } catch (AbstractMethodError e) { 12379 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 12380 " does not fully implement ViewParent", e); 12381 } 12382 break; 12383 case LAYOUT_DIRECTION_RTL: 12384 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 12385 break; 12386 case LAYOUT_DIRECTION_LOCALE: 12387 if((LAYOUT_DIRECTION_RTL == 12388 TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()))) { 12389 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 12390 } 12391 break; 12392 default: 12393 // Nothing to do, LTR by default 12394 } 12395 } 12396 12397 // Set to resolved 12398 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 12399 return true; 12400 } 12401 12402 /** 12403 * Check if layout direction resolution can be done. 12404 * 12405 * @return true if layout direction resolution can be done otherwise return false. 12406 */ 12407 public boolean canResolveLayoutDirection() { 12408 switch (getRawLayoutDirection()) { 12409 case LAYOUT_DIRECTION_INHERIT: 12410 if (mParent != null) { 12411 try { 12412 return mParent.canResolveLayoutDirection(); 12413 } catch (AbstractMethodError e) { 12414 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 12415 " does not fully implement ViewParent", e); 12416 } 12417 } 12418 return false; 12419 12420 default: 12421 return true; 12422 } 12423 } 12424 12425 /** 12426 * Reset the resolved layout direction. Layout direction will be resolved during a call to 12427 * {@link #onMeasure(int, int)}. 12428 * 12429 * @hide 12430 */ 12431 public void resetResolvedLayoutDirection() { 12432 // Reset the current resolved bits 12433 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 12434 } 12435 12436 /** 12437 * @return true if the layout direction is inherited. 12438 * 12439 * @hide 12440 */ 12441 public boolean isLayoutDirectionInherited() { 12442 return (getRawLayoutDirection() == LAYOUT_DIRECTION_INHERIT); 12443 } 12444 12445 /** 12446 * @return true if layout direction has been resolved. 12447 */ 12448 public boolean isLayoutDirectionResolved() { 12449 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED) == PFLAG2_LAYOUT_DIRECTION_RESOLVED; 12450 } 12451 12452 /** 12453 * Return if padding has been resolved 12454 * 12455 * @hide 12456 */ 12457 boolean isPaddingResolved() { 12458 return (mPrivateFlags2 & PFLAG2_PADDING_RESOLVED) == PFLAG2_PADDING_RESOLVED; 12459 } 12460 12461 /** 12462 * Resolves padding depending on layout direction, if applicable, and 12463 * recomputes internal padding values to adjust for scroll bars. 12464 * 12465 * @hide 12466 */ 12467 public void resolvePadding() { 12468 final int resolvedLayoutDirection = getLayoutDirection(); 12469 12470 if (!isRtlCompatibilityMode()) { 12471 // Post Jelly Bean MR1 case: we need to take the resolved layout direction into account. 12472 // If start / end padding are defined, they will be resolved (hence overriding) to 12473 // left / right or right / left depending on the resolved layout direction. 12474 // If start / end padding are not defined, use the left / right ones. 12475 if (mBackground != null && (!mLeftPaddingDefined || !mRightPaddingDefined)) { 12476 Rect padding = sThreadLocal.get(); 12477 if (padding == null) { 12478 padding = new Rect(); 12479 sThreadLocal.set(padding); 12480 } 12481 mBackground.getPadding(padding); 12482 if (!mLeftPaddingDefined) { 12483 mUserPaddingLeftInitial = padding.left; 12484 } 12485 if (!mRightPaddingDefined) { 12486 mUserPaddingRightInitial = padding.right; 12487 } 12488 } 12489 switch (resolvedLayoutDirection) { 12490 case LAYOUT_DIRECTION_RTL: 12491 if (mUserPaddingStart != UNDEFINED_PADDING) { 12492 mUserPaddingRight = mUserPaddingStart; 12493 } else { 12494 mUserPaddingRight = mUserPaddingRightInitial; 12495 } 12496 if (mUserPaddingEnd != UNDEFINED_PADDING) { 12497 mUserPaddingLeft = mUserPaddingEnd; 12498 } else { 12499 mUserPaddingLeft = mUserPaddingLeftInitial; 12500 } 12501 break; 12502 case LAYOUT_DIRECTION_LTR: 12503 default: 12504 if (mUserPaddingStart != UNDEFINED_PADDING) { 12505 mUserPaddingLeft = mUserPaddingStart; 12506 } else { 12507 mUserPaddingLeft = mUserPaddingLeftInitial; 12508 } 12509 if (mUserPaddingEnd != UNDEFINED_PADDING) { 12510 mUserPaddingRight = mUserPaddingEnd; 12511 } else { 12512 mUserPaddingRight = mUserPaddingRightInitial; 12513 } 12514 } 12515 12516 mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; 12517 } 12518 12519 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 12520 onRtlPropertiesChanged(resolvedLayoutDirection); 12521 12522 mPrivateFlags2 |= PFLAG2_PADDING_RESOLVED; 12523 } 12524 12525 /** 12526 * Reset the resolved layout direction. 12527 * 12528 * @hide 12529 */ 12530 public void resetResolvedPadding() { 12531 mPrivateFlags2 &= ~PFLAG2_PADDING_RESOLVED; 12532 } 12533 12534 /** 12535 * This is called when the view is detached from a window. At this point it 12536 * no longer has a surface for drawing. 12537 * 12538 * @see #onAttachedToWindow() 12539 */ 12540 protected void onDetachedFromWindow() { 12541 mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT; 12542 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 12543 12544 removeUnsetPressCallback(); 12545 removeLongPressCallback(); 12546 removePerformClickCallback(); 12547 removeSendViewScrolledAccessibilityEventCallback(); 12548 12549 destroyDrawingCache(); 12550 destroyLayer(false); 12551 12552 cleanupDraw(); 12553 12554 mCurrentAnimation = null; 12555 } 12556 12557 private void cleanupDraw() { 12558 if (mAttachInfo != null) { 12559 if (mDisplayList != null) { 12560 mDisplayList.markDirty(); 12561 mAttachInfo.mViewRootImpl.enqueueDisplayList(mDisplayList); 12562 } 12563 mAttachInfo.mViewRootImpl.cancelInvalidate(this); 12564 } else { 12565 // Should never happen 12566 resetDisplayList(); 12567 } 12568 } 12569 12570 /** 12571 * This method ensures the hardware renderer is in a valid state 12572 * before executing the specified action. 12573 * 12574 * This method will attempt to set a valid state even if the window 12575 * the renderer is attached to was destroyed. 12576 * 12577 * This method is not guaranteed to work. If the hardware renderer 12578 * does not exist or cannot be put in a valid state, this method 12579 * will not executed the specified action. 12580 * 12581 * The specified action is executed synchronously. 12582 * 12583 * @param action The action to execute after the renderer is in a valid state 12584 * 12585 * @return True if the specified Runnable was executed, false otherwise 12586 * 12587 * @hide 12588 */ 12589 public boolean executeHardwareAction(Runnable action) { 12590 //noinspection SimplifiableIfStatement 12591 if (mAttachInfo != null && mAttachInfo.mHardwareRenderer != null) { 12592 return mAttachInfo.mHardwareRenderer.safelyRun(action); 12593 } 12594 return false; 12595 } 12596 12597 void invalidateInheritedLayoutMode(int layoutModeOfRoot) { 12598 } 12599 12600 /** 12601 * @return The number of times this view has been attached to a window 12602 */ 12603 protected int getWindowAttachCount() { 12604 return mWindowAttachCount; 12605 } 12606 12607 /** 12608 * Retrieve a unique token identifying the window this view is attached to. 12609 * @return Return the window's token for use in 12610 * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. 12611 */ 12612 public IBinder getWindowToken() { 12613 return mAttachInfo != null ? mAttachInfo.mWindowToken : null; 12614 } 12615 12616 /** 12617 * Retrieve the {@link WindowId} for the window this view is 12618 * currently attached to. 12619 */ 12620 public WindowId getWindowId() { 12621 if (mAttachInfo == null) { 12622 return null; 12623 } 12624 if (mAttachInfo.mWindowId == null) { 12625 try { 12626 mAttachInfo.mIWindowId = mAttachInfo.mSession.getWindowId( 12627 mAttachInfo.mWindowToken); 12628 mAttachInfo.mWindowId = new WindowId( 12629 mAttachInfo.mIWindowId); 12630 } catch (RemoteException e) { 12631 } 12632 } 12633 return mAttachInfo.mWindowId; 12634 } 12635 12636 /** 12637 * Retrieve a unique token identifying the top-level "real" window of 12638 * the window that this view is attached to. That is, this is like 12639 * {@link #getWindowToken}, except if the window this view in is a panel 12640 * window (attached to another containing window), then the token of 12641 * the containing window is returned instead. 12642 * 12643 * @return Returns the associated window token, either 12644 * {@link #getWindowToken()} or the containing window's token. 12645 */ 12646 public IBinder getApplicationWindowToken() { 12647 AttachInfo ai = mAttachInfo; 12648 if (ai != null) { 12649 IBinder appWindowToken = ai.mPanelParentWindowToken; 12650 if (appWindowToken == null) { 12651 appWindowToken = ai.mWindowToken; 12652 } 12653 return appWindowToken; 12654 } 12655 return null; 12656 } 12657 12658 /** 12659 * Gets the logical display to which the view's window has been attached. 12660 * 12661 * @return The logical display, or null if the view is not currently attached to a window. 12662 */ 12663 public Display getDisplay() { 12664 return mAttachInfo != null ? mAttachInfo.mDisplay : null; 12665 } 12666 12667 /** 12668 * Retrieve private session object this view hierarchy is using to 12669 * communicate with the window manager. 12670 * @return the session object to communicate with the window manager 12671 */ 12672 /*package*/ IWindowSession getWindowSession() { 12673 return mAttachInfo != null ? mAttachInfo.mSession : null; 12674 } 12675 12676 /** 12677 * @param info the {@link android.view.View.AttachInfo} to associated with 12678 * this view 12679 */ 12680 void dispatchAttachedToWindow(AttachInfo info, int visibility) { 12681 //System.out.println("Attached! " + this); 12682 mAttachInfo = info; 12683 if (mOverlay != null) { 12684 mOverlay.getOverlayView().dispatchAttachedToWindow(info, visibility); 12685 } 12686 mWindowAttachCount++; 12687 // We will need to evaluate the drawable state at least once. 12688 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 12689 if (mFloatingTreeObserver != null) { 12690 info.mTreeObserver.merge(mFloatingTreeObserver); 12691 mFloatingTreeObserver = null; 12692 } 12693 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER) != 0) { 12694 mAttachInfo.mScrollContainers.add(this); 12695 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 12696 } 12697 performCollectViewAttributes(mAttachInfo, visibility); 12698 onAttachedToWindow(); 12699 12700 ListenerInfo li = mListenerInfo; 12701 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 12702 li != null ? li.mOnAttachStateChangeListeners : null; 12703 if (listeners != null && listeners.size() > 0) { 12704 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 12705 // perform the dispatching. The iterator is a safe guard against listeners that 12706 // could mutate the list by calling the various add/remove methods. This prevents 12707 // the array from being modified while we iterate it. 12708 for (OnAttachStateChangeListener listener : listeners) { 12709 listener.onViewAttachedToWindow(this); 12710 } 12711 } 12712 12713 int vis = info.mWindowVisibility; 12714 if (vis != GONE) { 12715 onWindowVisibilityChanged(vis); 12716 } 12717 if ((mPrivateFlags&PFLAG_DRAWABLE_STATE_DIRTY) != 0) { 12718 // If nobody has evaluated the drawable state yet, then do it now. 12719 refreshDrawableState(); 12720 } 12721 needGlobalAttributesUpdate(false); 12722 } 12723 12724 void dispatchDetachedFromWindow() { 12725 AttachInfo info = mAttachInfo; 12726 if (info != null) { 12727 int vis = info.mWindowVisibility; 12728 if (vis != GONE) { 12729 onWindowVisibilityChanged(GONE); 12730 } 12731 } 12732 12733 onDetachedFromWindow(); 12734 12735 ListenerInfo li = mListenerInfo; 12736 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 12737 li != null ? li.mOnAttachStateChangeListeners : null; 12738 if (listeners != null && listeners.size() > 0) { 12739 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 12740 // perform the dispatching. The iterator is a safe guard against listeners that 12741 // could mutate the list by calling the various add/remove methods. This prevents 12742 // the array from being modified while we iterate it. 12743 for (OnAttachStateChangeListener listener : listeners) { 12744 listener.onViewDetachedFromWindow(this); 12745 } 12746 } 12747 12748 if ((mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 12749 mAttachInfo.mScrollContainers.remove(this); 12750 mPrivateFlags &= ~PFLAG_SCROLL_CONTAINER_ADDED; 12751 } 12752 12753 mAttachInfo = null; 12754 if (mOverlay != null) { 12755 mOverlay.getOverlayView().dispatchDetachedFromWindow(); 12756 } 12757 } 12758 12759 /** 12760 * Cancel any deferred high-level input events that were previously posted to the event queue. 12761 * 12762 * <p>Many views post high-level events such as click handlers to the event queue 12763 * to run deferred in order to preserve a desired user experience - clearing visible 12764 * pressed states before executing, etc. This method will abort any events of this nature 12765 * that are currently in flight.</p> 12766 * 12767 * <p>Custom views that generate their own high-level deferred input events should override 12768 * {@link #onCancelPendingInputEvents()} and remove those pending events from the queue.</p> 12769 * 12770 * <p>This will also cancel pending input events for any child views.</p> 12771 * 12772 * <p>Note that this may not be sufficient as a debouncing strategy for clicks in all cases. 12773 * This will not impact newer events posted after this call that may occur as a result of 12774 * lower-level input events still waiting in the queue. If you are trying to prevent 12775 * double-submitted events for the duration of some sort of asynchronous transaction 12776 * you should also take other steps to protect against unexpected double inputs e.g. calling 12777 * {@link #setEnabled(boolean) setEnabled(false)} and re-enabling the view when 12778 * the transaction completes, tracking already submitted transaction IDs, etc.</p> 12779 */ 12780 public final void cancelPendingInputEvents() { 12781 dispatchCancelPendingInputEvents(); 12782 } 12783 12784 /** 12785 * Called by {@link #cancelPendingInputEvents()} to cancel input events in flight. 12786 * Overridden by ViewGroup to dispatch. Package scoped to prevent app-side meddling. 12787 */ 12788 void dispatchCancelPendingInputEvents() { 12789 mPrivateFlags3 &= ~PFLAG3_CALLED_SUPER; 12790 onCancelPendingInputEvents(); 12791 if ((mPrivateFlags3 & PFLAG3_CALLED_SUPER) != PFLAG3_CALLED_SUPER) { 12792 throw new SuperNotCalledException("View " + getClass().getSimpleName() + 12793 " did not call through to super.onCancelPendingInputEvents()"); 12794 } 12795 } 12796 12797 /** 12798 * Called as the result of a call to {@link #cancelPendingInputEvents()} on this view or 12799 * a parent view. 12800 * 12801 * <p>This method is responsible for removing any pending high-level input events that were 12802 * posted to the event queue to run later. Custom view classes that post their own deferred 12803 * high-level events via {@link #post(Runnable)}, {@link #postDelayed(Runnable, long)} or 12804 * {@link android.os.Handler} should override this method, call 12805 * <code>super.onCancelPendingInputEvents()</code> and remove those callbacks as appropriate. 12806 * </p> 12807 */ 12808 public void onCancelPendingInputEvents() { 12809 removePerformClickCallback(); 12810 cancelLongPress(); 12811 mPrivateFlags3 |= PFLAG3_CALLED_SUPER; 12812 } 12813 12814 /** 12815 * Store this view hierarchy's frozen state into the given container. 12816 * 12817 * @param container The SparseArray in which to save the view's state. 12818 * 12819 * @see #restoreHierarchyState(android.util.SparseArray) 12820 * @see #dispatchSaveInstanceState(android.util.SparseArray) 12821 * @see #onSaveInstanceState() 12822 */ 12823 public void saveHierarchyState(SparseArray<Parcelable> container) { 12824 dispatchSaveInstanceState(container); 12825 } 12826 12827 /** 12828 * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for 12829 * this view and its children. May be overridden to modify how freezing happens to a 12830 * view's children; for example, some views may want to not store state for their children. 12831 * 12832 * @param container The SparseArray in which to save the view's state. 12833 * 12834 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 12835 * @see #saveHierarchyState(android.util.SparseArray) 12836 * @see #onSaveInstanceState() 12837 */ 12838 protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { 12839 if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { 12840 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 12841 Parcelable state = onSaveInstanceState(); 12842 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 12843 throw new IllegalStateException( 12844 "Derived class did not call super.onSaveInstanceState()"); 12845 } 12846 if (state != null) { 12847 // Log.i("View", "Freezing #" + Integer.toHexString(mID) 12848 // + ": " + state); 12849 container.put(mID, state); 12850 } 12851 } 12852 } 12853 12854 /** 12855 * Hook allowing a view to generate a representation of its internal state 12856 * that can later be used to create a new instance with that same state. 12857 * This state should only contain information that is not persistent or can 12858 * not be reconstructed later. For example, you will never store your 12859 * current position on screen because that will be computed again when a 12860 * new instance of the view is placed in its view hierarchy. 12861 * <p> 12862 * Some examples of things you may store here: the current cursor position 12863 * in a text view (but usually not the text itself since that is stored in a 12864 * content provider or other persistent storage), the currently selected 12865 * item in a list view. 12866 * 12867 * @return Returns a Parcelable object containing the view's current dynamic 12868 * state, or null if there is nothing interesting to save. The 12869 * default implementation returns null. 12870 * @see #onRestoreInstanceState(android.os.Parcelable) 12871 * @see #saveHierarchyState(android.util.SparseArray) 12872 * @see #dispatchSaveInstanceState(android.util.SparseArray) 12873 * @see #setSaveEnabled(boolean) 12874 */ 12875 protected Parcelable onSaveInstanceState() { 12876 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 12877 return BaseSavedState.EMPTY_STATE; 12878 } 12879 12880 /** 12881 * Restore this view hierarchy's frozen state from the given container. 12882 * 12883 * @param container The SparseArray which holds previously frozen states. 12884 * 12885 * @see #saveHierarchyState(android.util.SparseArray) 12886 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 12887 * @see #onRestoreInstanceState(android.os.Parcelable) 12888 */ 12889 public void restoreHierarchyState(SparseArray<Parcelable> container) { 12890 dispatchRestoreInstanceState(container); 12891 } 12892 12893 /** 12894 * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the 12895 * state for this view and its children. May be overridden to modify how restoring 12896 * happens to a view's children; for example, some views may want to not store state 12897 * for their children. 12898 * 12899 * @param container The SparseArray which holds previously saved state. 12900 * 12901 * @see #dispatchSaveInstanceState(android.util.SparseArray) 12902 * @see #restoreHierarchyState(android.util.SparseArray) 12903 * @see #onRestoreInstanceState(android.os.Parcelable) 12904 */ 12905 protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { 12906 if (mID != NO_ID) { 12907 Parcelable state = container.get(mID); 12908 if (state != null) { 12909 // Log.i("View", "Restoreing #" + Integer.toHexString(mID) 12910 // + ": " + state); 12911 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 12912 onRestoreInstanceState(state); 12913 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 12914 throw new IllegalStateException( 12915 "Derived class did not call super.onRestoreInstanceState()"); 12916 } 12917 } 12918 } 12919 } 12920 12921 /** 12922 * Hook allowing a view to re-apply a representation of its internal state that had previously 12923 * been generated by {@link #onSaveInstanceState}. This function will never be called with a 12924 * null state. 12925 * 12926 * @param state The frozen state that had previously been returned by 12927 * {@link #onSaveInstanceState}. 12928 * 12929 * @see #onSaveInstanceState() 12930 * @see #restoreHierarchyState(android.util.SparseArray) 12931 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 12932 */ 12933 protected void onRestoreInstanceState(Parcelable state) { 12934 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 12935 if (state != BaseSavedState.EMPTY_STATE && state != null) { 12936 throw new IllegalArgumentException("Wrong state class, expecting View State but " 12937 + "received " + state.getClass().toString() + " instead. This usually happens " 12938 + "when two views of different type have the same id in the same hierarchy. " 12939 + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " 12940 + "other views do not use the same id."); 12941 } 12942 } 12943 12944 /** 12945 * <p>Return the time at which the drawing of the view hierarchy started.</p> 12946 * 12947 * @return the drawing start time in milliseconds 12948 */ 12949 public long getDrawingTime() { 12950 return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; 12951 } 12952 12953 /** 12954 * <p>Enables or disables the duplication of the parent's state into this view. When 12955 * duplication is enabled, this view gets its drawable state from its parent rather 12956 * than from its own internal properties.</p> 12957 * 12958 * <p>Note: in the current implementation, setting this property to true after the 12959 * view was added to a ViewGroup might have no effect at all. This property should 12960 * always be used from XML or set to true before adding this view to a ViewGroup.</p> 12961 * 12962 * <p>Note: if this view's parent addStateFromChildren property is enabled and this 12963 * property is enabled, an exception will be thrown.</p> 12964 * 12965 * <p>Note: if the child view uses and updates additionnal states which are unknown to the 12966 * parent, these states should not be affected by this method.</p> 12967 * 12968 * @param enabled True to enable duplication of the parent's drawable state, false 12969 * to disable it. 12970 * 12971 * @see #getDrawableState() 12972 * @see #isDuplicateParentStateEnabled() 12973 */ 12974 public void setDuplicateParentStateEnabled(boolean enabled) { 12975 setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); 12976 } 12977 12978 /** 12979 * <p>Indicates whether this duplicates its drawable state from its parent.</p> 12980 * 12981 * @return True if this view's drawable state is duplicated from the parent, 12982 * false otherwise 12983 * 12984 * @see #getDrawableState() 12985 * @see #setDuplicateParentStateEnabled(boolean) 12986 */ 12987 public boolean isDuplicateParentStateEnabled() { 12988 return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; 12989 } 12990 12991 /** 12992 * <p>Specifies the type of layer backing this view. The layer can be 12993 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 12994 * {@link #LAYER_TYPE_HARDWARE}.</p> 12995 * 12996 * <p>A layer is associated with an optional {@link android.graphics.Paint} 12997 * instance that controls how the layer is composed on screen. The following 12998 * properties of the paint are taken into account when composing the layer:</p> 12999 * <ul> 13000 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 13001 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 13002 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 13003 * </ul> 13004 * 13005 * <p>If this view has an alpha value set to < 1.0 by calling 13006 * {@link #setAlpha(float)}, the alpha value of the layer's paint is superceded 13007 * by this view's alpha value.</p> 13008 * 13009 * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE}, 13010 * {@link #LAYER_TYPE_SOFTWARE} and {@link #LAYER_TYPE_HARDWARE} 13011 * for more information on when and how to use layers.</p> 13012 * 13013 * @param layerType The type of layer to use with this view, must be one of 13014 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 13015 * {@link #LAYER_TYPE_HARDWARE} 13016 * @param paint The paint used to compose the layer. This argument is optional 13017 * and can be null. It is ignored when the layer type is 13018 * {@link #LAYER_TYPE_NONE} 13019 * 13020 * @see #getLayerType() 13021 * @see #LAYER_TYPE_NONE 13022 * @see #LAYER_TYPE_SOFTWARE 13023 * @see #LAYER_TYPE_HARDWARE 13024 * @see #setAlpha(float) 13025 * 13026 * @attr ref android.R.styleable#View_layerType 13027 */ 13028 public void setLayerType(int layerType, Paint paint) { 13029 if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { 13030 throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " 13031 + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); 13032 } 13033 13034 if (layerType == mLayerType) { 13035 if (layerType != LAYER_TYPE_NONE && paint != mLayerPaint) { 13036 mLayerPaint = paint == null ? new Paint() : paint; 13037 invalidateParentCaches(); 13038 invalidate(true); 13039 } 13040 return; 13041 } 13042 13043 // Destroy any previous software drawing cache if needed 13044 switch (mLayerType) { 13045 case LAYER_TYPE_HARDWARE: 13046 destroyLayer(false); 13047 // fall through - non-accelerated views may use software layer mechanism instead 13048 case LAYER_TYPE_SOFTWARE: 13049 destroyDrawingCache(); 13050 break; 13051 default: 13052 break; 13053 } 13054 13055 mLayerType = layerType; 13056 final boolean layerDisabled = mLayerType == LAYER_TYPE_NONE; 13057 mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); 13058 mLocalDirtyRect = layerDisabled ? null : new Rect(); 13059 13060 invalidateParentCaches(); 13061 invalidate(true); 13062 } 13063 13064 /** 13065 * Updates the {@link Paint} object used with the current layer (used only if the current 13066 * layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint 13067 * provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time 13068 * the View is redrawn, but {@link #setLayerPaint(android.graphics.Paint)} must be called to 13069 * ensure that the view gets redrawn immediately. 13070 * 13071 * <p>A layer is associated with an optional {@link android.graphics.Paint} 13072 * instance that controls how the layer is composed on screen. The following 13073 * properties of the paint are taken into account when composing the layer:</p> 13074 * <ul> 13075 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 13076 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 13077 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 13078 * </ul> 13079 * 13080 * <p>If this view has an alpha value set to < 1.0 by calling {@link #setAlpha(float)}, the 13081 * alpha value of the layer's paint is superceded by this view's alpha value.</p> 13082 * 13083 * @param paint The paint used to compose the layer. This argument is optional 13084 * and can be null. It is ignored when the layer type is 13085 * {@link #LAYER_TYPE_NONE} 13086 * 13087 * @see #setLayerType(int, android.graphics.Paint) 13088 */ 13089 public void setLayerPaint(Paint paint) { 13090 int layerType = getLayerType(); 13091 if (layerType != LAYER_TYPE_NONE) { 13092 mLayerPaint = paint == null ? new Paint() : paint; 13093 if (layerType == LAYER_TYPE_HARDWARE) { 13094 HardwareLayer layer = getHardwareLayer(); 13095 if (layer != null) { 13096 layer.setLayerPaint(paint); 13097 } 13098 invalidateViewProperty(false, false); 13099 } else { 13100 invalidate(); 13101 } 13102 } 13103 } 13104 13105 /** 13106 * Indicates whether this view has a static layer. A view with layer type 13107 * {@link #LAYER_TYPE_NONE} is a static layer. Other types of layers are 13108 * dynamic. 13109 */ 13110 boolean hasStaticLayer() { 13111 return true; 13112 } 13113 13114 /** 13115 * Indicates what type of layer is currently associated with this view. By default 13116 * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. 13117 * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} 13118 * for more information on the different types of layers. 13119 * 13120 * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 13121 * {@link #LAYER_TYPE_HARDWARE} 13122 * 13123 * @see #setLayerType(int, android.graphics.Paint) 13124 * @see #buildLayer() 13125 * @see #LAYER_TYPE_NONE 13126 * @see #LAYER_TYPE_SOFTWARE 13127 * @see #LAYER_TYPE_HARDWARE 13128 */ 13129 public int getLayerType() { 13130 return mLayerType; 13131 } 13132 13133 /** 13134 * Forces this view's layer to be created and this view to be rendered 13135 * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, 13136 * invoking this method will have no effect. 13137 * 13138 * This method can for instance be used to render a view into its layer before 13139 * starting an animation. If this view is complex, rendering into the layer 13140 * before starting the animation will avoid skipping frames. 13141 * 13142 * @throws IllegalStateException If this view is not attached to a window 13143 * 13144 * @see #setLayerType(int, android.graphics.Paint) 13145 */ 13146 public void buildLayer() { 13147 if (mLayerType == LAYER_TYPE_NONE) return; 13148 13149 final AttachInfo attachInfo = mAttachInfo; 13150 if (attachInfo == null) { 13151 throw new IllegalStateException("This view must be attached to a window first"); 13152 } 13153 13154 switch (mLayerType) { 13155 case LAYER_TYPE_HARDWARE: 13156 if (attachInfo.mHardwareRenderer != null && 13157 attachInfo.mHardwareRenderer.isEnabled() && 13158 attachInfo.mHardwareRenderer.validate()) { 13159 getHardwareLayer(); 13160 // TODO: We need a better way to handle this case 13161 // If views have registered pre-draw listeners they need 13162 // to be notified before we build the layer. Those listeners 13163 // may however rely on other events to happen first so we 13164 // cannot just invoke them here until they don't cancel the 13165 // current frame 13166 if (!attachInfo.mTreeObserver.hasOnPreDrawListeners()) { 13167 attachInfo.mViewRootImpl.dispatchFlushHardwareLayerUpdates(); 13168 } 13169 } 13170 break; 13171 case LAYER_TYPE_SOFTWARE: 13172 buildDrawingCache(true); 13173 break; 13174 } 13175 } 13176 13177 /** 13178 * <p>Returns a hardware layer that can be used to draw this view again 13179 * without executing its draw method.</p> 13180 * 13181 * @return A HardwareLayer ready to render, or null if an error occurred. 13182 */ 13183 HardwareLayer getHardwareLayer() { 13184 if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null || 13185 !mAttachInfo.mHardwareRenderer.isEnabled()) { 13186 return null; 13187 } 13188 13189 if (!mAttachInfo.mHardwareRenderer.validate()) return null; 13190 13191 final int width = mRight - mLeft; 13192 final int height = mBottom - mTop; 13193 13194 if (width == 0 || height == 0) { 13195 return null; 13196 } 13197 13198 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || mHardwareLayer == null) { 13199 if (mHardwareLayer == null) { 13200 mHardwareLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer( 13201 width, height, isOpaque()); 13202 mLocalDirtyRect.set(0, 0, width, height); 13203 } else { 13204 if (mHardwareLayer.getWidth() != width || mHardwareLayer.getHeight() != height) { 13205 if (mHardwareLayer.resize(width, height)) { 13206 mLocalDirtyRect.set(0, 0, width, height); 13207 } 13208 } 13209 13210 // This should not be necessary but applications that change 13211 // the parameters of their background drawable without calling 13212 // this.setBackground(Drawable) can leave the view in a bad state 13213 // (for instance isOpaque() returns true, but the background is 13214 // not opaque.) 13215 computeOpaqueFlags(); 13216 13217 final boolean opaque = isOpaque(); 13218 if (mHardwareLayer.isValid() && mHardwareLayer.isOpaque() != opaque) { 13219 mHardwareLayer.setOpaque(opaque); 13220 mLocalDirtyRect.set(0, 0, width, height); 13221 } 13222 } 13223 13224 // The layer is not valid if the underlying GPU resources cannot be allocated 13225 if (!mHardwareLayer.isValid()) { 13226 return null; 13227 } 13228 13229 mHardwareLayer.setLayerPaint(mLayerPaint); 13230 mHardwareLayer.redrawLater(getHardwareLayerDisplayList(mHardwareLayer), mLocalDirtyRect); 13231 ViewRootImpl viewRoot = getViewRootImpl(); 13232 if (viewRoot != null) viewRoot.pushHardwareLayerUpdate(mHardwareLayer); 13233 13234 mLocalDirtyRect.setEmpty(); 13235 } 13236 13237 return mHardwareLayer; 13238 } 13239 13240 /** 13241 * Destroys this View's hardware layer if possible. 13242 * 13243 * @return True if the layer was destroyed, false otherwise. 13244 * 13245 * @see #setLayerType(int, android.graphics.Paint) 13246 * @see #LAYER_TYPE_HARDWARE 13247 */ 13248 boolean destroyLayer(boolean valid) { 13249 if (mHardwareLayer != null) { 13250 AttachInfo info = mAttachInfo; 13251 if (info != null && info.mHardwareRenderer != null && 13252 info.mHardwareRenderer.isEnabled() && 13253 (valid || info.mHardwareRenderer.validate())) { 13254 13255 info.mHardwareRenderer.cancelLayerUpdate(mHardwareLayer); 13256 mHardwareLayer.destroy(); 13257 mHardwareLayer = null; 13258 13259 invalidate(true); 13260 invalidateParentCaches(); 13261 } 13262 return true; 13263 } 13264 return false; 13265 } 13266 13267 /** 13268 * Destroys all hardware rendering resources. This method is invoked 13269 * when the system needs to reclaim resources. Upon execution of this 13270 * method, you should free any OpenGL resources created by the view. 13271 * 13272 * Note: you <strong>must</strong> call 13273 * <code>super.destroyHardwareResources()</code> when overriding 13274 * this method. 13275 * 13276 * @hide 13277 */ 13278 protected void destroyHardwareResources() { 13279 resetDisplayList(); 13280 destroyLayer(true); 13281 } 13282 13283 /** 13284 * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call 13285 * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a 13286 * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when 13287 * the cache is enabled. To benefit from the cache, you must request the drawing cache by 13288 * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not 13289 * null.</p> 13290 * 13291 * <p>Enabling the drawing cache is similar to 13292 * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware 13293 * acceleration is turned off. When hardware acceleration is turned on, enabling the 13294 * drawing cache has no effect on rendering because the system uses a different mechanism 13295 * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even 13296 * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} 13297 * for information on how to enable software and hardware layers.</p> 13298 * 13299 * <p>This API can be used to manually generate 13300 * a bitmap copy of this view, by setting the flag to <code>true</code> and calling 13301 * {@link #getDrawingCache()}.</p> 13302 * 13303 * @param enabled true to enable the drawing cache, false otherwise 13304 * 13305 * @see #isDrawingCacheEnabled() 13306 * @see #getDrawingCache() 13307 * @see #buildDrawingCache() 13308 * @see #setLayerType(int, android.graphics.Paint) 13309 */ 13310 public void setDrawingCacheEnabled(boolean enabled) { 13311 mCachingFailed = false; 13312 setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); 13313 } 13314 13315 /** 13316 * <p>Indicates whether the drawing cache is enabled for this view.</p> 13317 * 13318 * @return true if the drawing cache is enabled 13319 * 13320 * @see #setDrawingCacheEnabled(boolean) 13321 * @see #getDrawingCache() 13322 */ 13323 @ViewDebug.ExportedProperty(category = "drawing") 13324 public boolean isDrawingCacheEnabled() { 13325 return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; 13326 } 13327 13328 /** 13329 * Debugging utility which recursively outputs the dirty state of a view and its 13330 * descendants. 13331 * 13332 * @hide 13333 */ 13334 @SuppressWarnings({"UnusedDeclaration"}) 13335 public void outputDirtyFlags(String indent, boolean clear, int clearMask) { 13336 Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.PFLAG_DIRTY_MASK) + 13337 ") DRAWN(" + (mPrivateFlags & PFLAG_DRAWN) + ")" + " CACHE_VALID(" + 13338 (mPrivateFlags & View.PFLAG_DRAWING_CACHE_VALID) + 13339 ") INVALIDATED(" + (mPrivateFlags & PFLAG_INVALIDATED) + ")"); 13340 if (clear) { 13341 mPrivateFlags &= clearMask; 13342 } 13343 if (this instanceof ViewGroup) { 13344 ViewGroup parent = (ViewGroup) this; 13345 final int count = parent.getChildCount(); 13346 for (int i = 0; i < count; i++) { 13347 final View child = parent.getChildAt(i); 13348 child.outputDirtyFlags(indent + " ", clear, clearMask); 13349 } 13350 } 13351 } 13352 13353 /** 13354 * This method is used by ViewGroup to cause its children to restore or recreate their 13355 * display lists. It is called by getDisplayList() when the parent ViewGroup does not need 13356 * to recreate its own display list, which would happen if it went through the normal 13357 * draw/dispatchDraw mechanisms. 13358 * 13359 * @hide 13360 */ 13361 protected void dispatchGetDisplayList() {} 13362 13363 /** 13364 * A view that is not attached or hardware accelerated cannot create a display list. 13365 * This method checks these conditions and returns the appropriate result. 13366 * 13367 * @return true if view has the ability to create a display list, false otherwise. 13368 * 13369 * @hide 13370 */ 13371 public boolean canHaveDisplayList() { 13372 return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); 13373 } 13374 13375 /** 13376 * Returns a DisplayList. If the incoming displayList is null, one will be created. 13377 * Otherwise, the same display list will be returned (after having been rendered into 13378 * along the way, depending on the invalidation state of the view). 13379 * 13380 * @param displayList The previous version of this displayList, could be null. 13381 * @param isLayer Whether the requester of the display list is a layer. If so, 13382 * the view will avoid creating a layer inside the resulting display list. 13383 * @return A new or reused DisplayList object. 13384 */ 13385 private DisplayList getDisplayList(DisplayList displayList, boolean isLayer) { 13386 if (!canHaveDisplayList()) { 13387 return null; 13388 } 13389 13390 if (((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || 13391 displayList == null || !displayList.isValid() || 13392 (!isLayer && mRecreateDisplayList))) { 13393 // Don't need to recreate the display list, just need to tell our 13394 // children to restore/recreate theirs 13395 if (displayList != null && displayList.isValid() && 13396 !isLayer && !mRecreateDisplayList) { 13397 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 13398 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13399 dispatchGetDisplayList(); 13400 13401 return displayList; 13402 } 13403 13404 if (!isLayer) { 13405 // If we got here, we're recreating it. Mark it as such to ensure that 13406 // we copy in child display lists into ours in drawChild() 13407 mRecreateDisplayList = true; 13408 } 13409 if (displayList == null) { 13410 displayList = DisplayList.create(getClass().getName()); 13411 // If we're creating a new display list, make sure our parent gets invalidated 13412 // since they will need to recreate their display list to account for this 13413 // new child display list. 13414 invalidateParentCaches(); 13415 } 13416 13417 boolean caching = false; 13418 int width = mRight - mLeft; 13419 int height = mBottom - mTop; 13420 int layerType = getLayerType(); 13421 13422 final HardwareCanvas canvas = displayList.start(width, height); 13423 13424 try { 13425 if (!isLayer && layerType != LAYER_TYPE_NONE) { 13426 if (layerType == LAYER_TYPE_HARDWARE) { 13427 final HardwareLayer layer = getHardwareLayer(); 13428 if (layer != null && layer.isValid()) { 13429 canvas.drawHardwareLayer(layer, 0, 0, mLayerPaint); 13430 } else { 13431 canvas.saveLayer(0, 0, mRight - mLeft, mBottom - mTop, mLayerPaint, 13432 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | 13433 Canvas.CLIP_TO_LAYER_SAVE_FLAG); 13434 } 13435 caching = true; 13436 } else { 13437 buildDrawingCache(true); 13438 Bitmap cache = getDrawingCache(true); 13439 if (cache != null) { 13440 canvas.drawBitmap(cache, 0, 0, mLayerPaint); 13441 caching = true; 13442 } 13443 } 13444 } else { 13445 13446 computeScroll(); 13447 13448 canvas.translate(-mScrollX, -mScrollY); 13449 if (!isLayer) { 13450 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 13451 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13452 } 13453 13454 // Fast path for layouts with no backgrounds 13455 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 13456 dispatchDraw(canvas); 13457 if (mOverlay != null && !mOverlay.isEmpty()) { 13458 mOverlay.getOverlayView().draw(canvas); 13459 } 13460 } else { 13461 draw(canvas); 13462 } 13463 } 13464 } finally { 13465 displayList.end(); 13466 displayList.setCaching(caching); 13467 if (isLayer) { 13468 displayList.setLeftTopRightBottom(0, 0, width, height); 13469 } else { 13470 setDisplayListProperties(displayList); 13471 } 13472 } 13473 } else if (!isLayer) { 13474 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 13475 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13476 } 13477 13478 return displayList; 13479 } 13480 13481 /** 13482 * Get the DisplayList for the HardwareLayer 13483 * 13484 * @param layer The HardwareLayer whose DisplayList we want 13485 * @return A DisplayList fopr the specified HardwareLayer 13486 */ 13487 private DisplayList getHardwareLayerDisplayList(HardwareLayer layer) { 13488 DisplayList displayList = getDisplayList(layer.getDisplayList(), true); 13489 layer.setDisplayList(displayList); 13490 return displayList; 13491 } 13492 13493 13494 /** 13495 * <p>Returns a display list that can be used to draw this view again 13496 * without executing its draw method.</p> 13497 * 13498 * @return A DisplayList ready to replay, or null if caching is not enabled. 13499 * 13500 * @hide 13501 */ 13502 public DisplayList getDisplayList() { 13503 mDisplayList = getDisplayList(mDisplayList, false); 13504 return mDisplayList; 13505 } 13506 13507 private void clearDisplayList() { 13508 if (mDisplayList != null) { 13509 mDisplayList.clear(); 13510 } 13511 } 13512 13513 private void resetDisplayList() { 13514 if (mDisplayList != null) { 13515 mDisplayList.reset(); 13516 } 13517 } 13518 13519 /** 13520 * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> 13521 * 13522 * @return A non-scaled bitmap representing this view or null if cache is disabled. 13523 * 13524 * @see #getDrawingCache(boolean) 13525 */ 13526 public Bitmap getDrawingCache() { 13527 return getDrawingCache(false); 13528 } 13529 13530 /** 13531 * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap 13532 * is null when caching is disabled. If caching is enabled and the cache is not ready, 13533 * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not 13534 * draw from the cache when the cache is enabled. To benefit from the cache, you must 13535 * request the drawing cache by calling this method and draw it on screen if the 13536 * returned bitmap is not null.</p> 13537 * 13538 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 13539 * this method will create a bitmap of the same size as this view. Because this bitmap 13540 * will be drawn scaled by the parent ViewGroup, the result on screen might show 13541 * scaling artifacts. To avoid such artifacts, you should call this method by setting 13542 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 13543 * size than the view. This implies that your application must be able to handle this 13544 * size.</p> 13545 * 13546 * @param autoScale Indicates whether the generated bitmap should be scaled based on 13547 * the current density of the screen when the application is in compatibility 13548 * mode. 13549 * 13550 * @return A bitmap representing this view or null if cache is disabled. 13551 * 13552 * @see #setDrawingCacheEnabled(boolean) 13553 * @see #isDrawingCacheEnabled() 13554 * @see #buildDrawingCache(boolean) 13555 * @see #destroyDrawingCache() 13556 */ 13557 public Bitmap getDrawingCache(boolean autoScale) { 13558 if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { 13559 return null; 13560 } 13561 if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { 13562 buildDrawingCache(autoScale); 13563 } 13564 return autoScale ? mDrawingCache : mUnscaledDrawingCache; 13565 } 13566 13567 /** 13568 * <p>Frees the resources used by the drawing cache. If you call 13569 * {@link #buildDrawingCache()} manually without calling 13570 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 13571 * should cleanup the cache with this method afterwards.</p> 13572 * 13573 * @see #setDrawingCacheEnabled(boolean) 13574 * @see #buildDrawingCache() 13575 * @see #getDrawingCache() 13576 */ 13577 public void destroyDrawingCache() { 13578 if (mDrawingCache != null) { 13579 mDrawingCache.recycle(); 13580 mDrawingCache = null; 13581 } 13582 if (mUnscaledDrawingCache != null) { 13583 mUnscaledDrawingCache.recycle(); 13584 mUnscaledDrawingCache = null; 13585 } 13586 } 13587 13588 /** 13589 * Setting a solid background color for the drawing cache's bitmaps will improve 13590 * performance and memory usage. Note, though that this should only be used if this 13591 * view will always be drawn on top of a solid color. 13592 * 13593 * @param color The background color to use for the drawing cache's bitmap 13594 * 13595 * @see #setDrawingCacheEnabled(boolean) 13596 * @see #buildDrawingCache() 13597 * @see #getDrawingCache() 13598 */ 13599 public void setDrawingCacheBackgroundColor(int color) { 13600 if (color != mDrawingCacheBackgroundColor) { 13601 mDrawingCacheBackgroundColor = color; 13602 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 13603 } 13604 } 13605 13606 /** 13607 * @see #setDrawingCacheBackgroundColor(int) 13608 * 13609 * @return The background color to used for the drawing cache's bitmap 13610 */ 13611 public int getDrawingCacheBackgroundColor() { 13612 return mDrawingCacheBackgroundColor; 13613 } 13614 13615 /** 13616 * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> 13617 * 13618 * @see #buildDrawingCache(boolean) 13619 */ 13620 public void buildDrawingCache() { 13621 buildDrawingCache(false); 13622 } 13623 13624 /** 13625 * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> 13626 * 13627 * <p>If you call {@link #buildDrawingCache()} manually without calling 13628 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 13629 * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> 13630 * 13631 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 13632 * this method will create a bitmap of the same size as this view. Because this bitmap 13633 * will be drawn scaled by the parent ViewGroup, the result on screen might show 13634 * scaling artifacts. To avoid such artifacts, you should call this method by setting 13635 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 13636 * size than the view. This implies that your application must be able to handle this 13637 * size.</p> 13638 * 13639 * <p>You should avoid calling this method when hardware acceleration is enabled. If 13640 * you do not need the drawing cache bitmap, calling this method will increase memory 13641 * usage and cause the view to be rendered in software once, thus negatively impacting 13642 * performance.</p> 13643 * 13644 * @see #getDrawingCache() 13645 * @see #destroyDrawingCache() 13646 */ 13647 public void buildDrawingCache(boolean autoScale) { 13648 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || (autoScale ? 13649 mDrawingCache == null : mUnscaledDrawingCache == null)) { 13650 mCachingFailed = false; 13651 13652 int width = mRight - mLeft; 13653 int height = mBottom - mTop; 13654 13655 final AttachInfo attachInfo = mAttachInfo; 13656 final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; 13657 13658 if (autoScale && scalingRequired) { 13659 width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); 13660 height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); 13661 } 13662 13663 final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; 13664 final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); 13665 final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; 13666 13667 final long projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4); 13668 final long drawingCacheSize = 13669 ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize(); 13670 if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) { 13671 if (width > 0 && height > 0) { 13672 Log.w(VIEW_LOG_TAG, "View too large to fit into drawing cache, needs " 13673 + projectedBitmapSize + " bytes, only " 13674 + drawingCacheSize + " available"); 13675 } 13676 destroyDrawingCache(); 13677 mCachingFailed = true; 13678 return; 13679 } 13680 13681 boolean clear = true; 13682 Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; 13683 13684 if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { 13685 Bitmap.Config quality; 13686 if (!opaque) { 13687 // Never pick ARGB_4444 because it looks awful 13688 // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case 13689 switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { 13690 case DRAWING_CACHE_QUALITY_AUTO: 13691 case DRAWING_CACHE_QUALITY_LOW: 13692 case DRAWING_CACHE_QUALITY_HIGH: 13693 default: 13694 quality = Bitmap.Config.ARGB_8888; 13695 break; 13696 } 13697 } else { 13698 // Optimization for translucent windows 13699 // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() 13700 quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 13701 } 13702 13703 // Try to cleanup memory 13704 if (bitmap != null) bitmap.recycle(); 13705 13706 try { 13707 bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 13708 width, height, quality); 13709 bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); 13710 if (autoScale) { 13711 mDrawingCache = bitmap; 13712 } else { 13713 mUnscaledDrawingCache = bitmap; 13714 } 13715 if (opaque && use32BitCache) bitmap.setHasAlpha(false); 13716 } catch (OutOfMemoryError e) { 13717 // If there is not enough memory to create the bitmap cache, just 13718 // ignore the issue as bitmap caches are not required to draw the 13719 // view hierarchy 13720 if (autoScale) { 13721 mDrawingCache = null; 13722 } else { 13723 mUnscaledDrawingCache = null; 13724 } 13725 mCachingFailed = true; 13726 return; 13727 } 13728 13729 clear = drawingCacheBackgroundColor != 0; 13730 } 13731 13732 Canvas canvas; 13733 if (attachInfo != null) { 13734 canvas = attachInfo.mCanvas; 13735 if (canvas == null) { 13736 canvas = new Canvas(); 13737 } 13738 canvas.setBitmap(bitmap); 13739 // Temporarily clobber the cached Canvas in case one of our children 13740 // is also using a drawing cache. Without this, the children would 13741 // steal the canvas by attaching their own bitmap to it and bad, bad 13742 // thing would happen (invisible views, corrupted drawings, etc.) 13743 attachInfo.mCanvas = null; 13744 } else { 13745 // This case should hopefully never or seldom happen 13746 canvas = new Canvas(bitmap); 13747 } 13748 13749 if (clear) { 13750 bitmap.eraseColor(drawingCacheBackgroundColor); 13751 } 13752 13753 computeScroll(); 13754 final int restoreCount = canvas.save(); 13755 13756 if (autoScale && scalingRequired) { 13757 final float scale = attachInfo.mApplicationScale; 13758 canvas.scale(scale, scale); 13759 } 13760 13761 canvas.translate(-mScrollX, -mScrollY); 13762 13763 mPrivateFlags |= PFLAG_DRAWN; 13764 if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || 13765 mLayerType != LAYER_TYPE_NONE) { 13766 mPrivateFlags |= PFLAG_DRAWING_CACHE_VALID; 13767 } 13768 13769 // Fast path for layouts with no backgrounds 13770 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 13771 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13772 dispatchDraw(canvas); 13773 if (mOverlay != null && !mOverlay.isEmpty()) { 13774 mOverlay.getOverlayView().draw(canvas); 13775 } 13776 } else { 13777 draw(canvas); 13778 } 13779 13780 canvas.restoreToCount(restoreCount); 13781 canvas.setBitmap(null); 13782 13783 if (attachInfo != null) { 13784 // Restore the cached Canvas for our siblings 13785 attachInfo.mCanvas = canvas; 13786 } 13787 } 13788 } 13789 13790 /** 13791 * Create a snapshot of the view into a bitmap. We should probably make 13792 * some form of this public, but should think about the API. 13793 */ 13794 Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { 13795 int width = mRight - mLeft; 13796 int height = mBottom - mTop; 13797 13798 final AttachInfo attachInfo = mAttachInfo; 13799 final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; 13800 width = (int) ((width * scale) + 0.5f); 13801 height = (int) ((height * scale) + 0.5f); 13802 13803 Bitmap bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 13804 width > 0 ? width : 1, height > 0 ? height : 1, quality); 13805 if (bitmap == null) { 13806 throw new OutOfMemoryError(); 13807 } 13808 13809 Resources resources = getResources(); 13810 if (resources != null) { 13811 bitmap.setDensity(resources.getDisplayMetrics().densityDpi); 13812 } 13813 13814 Canvas canvas; 13815 if (attachInfo != null) { 13816 canvas = attachInfo.mCanvas; 13817 if (canvas == null) { 13818 canvas = new Canvas(); 13819 } 13820 canvas.setBitmap(bitmap); 13821 // Temporarily clobber the cached Canvas in case one of our children 13822 // is also using a drawing cache. Without this, the children would 13823 // steal the canvas by attaching their own bitmap to it and bad, bad 13824 // things would happen (invisible views, corrupted drawings, etc.) 13825 attachInfo.mCanvas = null; 13826 } else { 13827 // This case should hopefully never or seldom happen 13828 canvas = new Canvas(bitmap); 13829 } 13830 13831 if ((backgroundColor & 0xff000000) != 0) { 13832 bitmap.eraseColor(backgroundColor); 13833 } 13834 13835 computeScroll(); 13836 final int restoreCount = canvas.save(); 13837 canvas.scale(scale, scale); 13838 canvas.translate(-mScrollX, -mScrollY); 13839 13840 // Temporarily remove the dirty mask 13841 int flags = mPrivateFlags; 13842 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13843 13844 // Fast path for layouts with no backgrounds 13845 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 13846 dispatchDraw(canvas); 13847 if (mOverlay != null && !mOverlay.isEmpty()) { 13848 mOverlay.getOverlayView().draw(canvas); 13849 } 13850 } else { 13851 draw(canvas); 13852 } 13853 13854 mPrivateFlags = flags; 13855 13856 canvas.restoreToCount(restoreCount); 13857 canvas.setBitmap(null); 13858 13859 if (attachInfo != null) { 13860 // Restore the cached Canvas for our siblings 13861 attachInfo.mCanvas = canvas; 13862 } 13863 13864 return bitmap; 13865 } 13866 13867 /** 13868 * Indicates whether this View is currently in edit mode. A View is usually 13869 * in edit mode when displayed within a developer tool. For instance, if 13870 * this View is being drawn by a visual user interface builder, this method 13871 * should return true. 13872 * 13873 * Subclasses should check the return value of this method to provide 13874 * different behaviors if their normal behavior might interfere with the 13875 * host environment. For instance: the class spawns a thread in its 13876 * constructor, the drawing code relies on device-specific features, etc. 13877 * 13878 * This method is usually checked in the drawing code of custom widgets. 13879 * 13880 * @return True if this View is in edit mode, false otherwise. 13881 */ 13882 public boolean isInEditMode() { 13883 return false; 13884 } 13885 13886 /** 13887 * If the View draws content inside its padding and enables fading edges, 13888 * it needs to support padding offsets. Padding offsets are added to the 13889 * fading edges to extend the length of the fade so that it covers pixels 13890 * drawn inside the padding. 13891 * 13892 * Subclasses of this class should override this method if they need 13893 * to draw content inside the padding. 13894 * 13895 * @return True if padding offset must be applied, false otherwise. 13896 * 13897 * @see #getLeftPaddingOffset() 13898 * @see #getRightPaddingOffset() 13899 * @see #getTopPaddingOffset() 13900 * @see #getBottomPaddingOffset() 13901 * 13902 * @since CURRENT 13903 */ 13904 protected boolean isPaddingOffsetRequired() { 13905 return false; 13906 } 13907 13908 /** 13909 * Amount by which to extend the left fading region. Called only when 13910 * {@link #isPaddingOffsetRequired()} returns true. 13911 * 13912 * @return The left padding offset in pixels. 13913 * 13914 * @see #isPaddingOffsetRequired() 13915 * 13916 * @since CURRENT 13917 */ 13918 protected int getLeftPaddingOffset() { 13919 return 0; 13920 } 13921 13922 /** 13923 * Amount by which to extend the right fading region. Called only when 13924 * {@link #isPaddingOffsetRequired()} returns true. 13925 * 13926 * @return The right padding offset in pixels. 13927 * 13928 * @see #isPaddingOffsetRequired() 13929 * 13930 * @since CURRENT 13931 */ 13932 protected int getRightPaddingOffset() { 13933 return 0; 13934 } 13935 13936 /** 13937 * Amount by which to extend the top fading region. Called only when 13938 * {@link #isPaddingOffsetRequired()} returns true. 13939 * 13940 * @return The top padding offset in pixels. 13941 * 13942 * @see #isPaddingOffsetRequired() 13943 * 13944 * @since CURRENT 13945 */ 13946 protected int getTopPaddingOffset() { 13947 return 0; 13948 } 13949 13950 /** 13951 * Amount by which to extend the bottom fading region. Called only when 13952 * {@link #isPaddingOffsetRequired()} returns true. 13953 * 13954 * @return The bottom padding offset in pixels. 13955 * 13956 * @see #isPaddingOffsetRequired() 13957 * 13958 * @since CURRENT 13959 */ 13960 protected int getBottomPaddingOffset() { 13961 return 0; 13962 } 13963 13964 /** 13965 * @hide 13966 * @param offsetRequired 13967 */ 13968 protected int getFadeTop(boolean offsetRequired) { 13969 int top = mPaddingTop; 13970 if (offsetRequired) top += getTopPaddingOffset(); 13971 return top; 13972 } 13973 13974 /** 13975 * @hide 13976 * @param offsetRequired 13977 */ 13978 protected int getFadeHeight(boolean offsetRequired) { 13979 int padding = mPaddingTop; 13980 if (offsetRequired) padding += getTopPaddingOffset(); 13981 return mBottom - mTop - mPaddingBottom - padding; 13982 } 13983 13984 /** 13985 * <p>Indicates whether this view is attached to a hardware accelerated 13986 * window or not.</p> 13987 * 13988 * <p>Even if this method returns true, it does not mean that every call 13989 * to {@link #draw(android.graphics.Canvas)} will be made with an hardware 13990 * accelerated {@link android.graphics.Canvas}. For instance, if this view 13991 * is drawn onto an offscreen {@link android.graphics.Bitmap} and its 13992 * window is hardware accelerated, 13993 * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely 13994 * return false, and this method will return true.</p> 13995 * 13996 * @return True if the view is attached to a window and the window is 13997 * hardware accelerated; false in any other case. 13998 */ 13999 public boolean isHardwareAccelerated() { 14000 return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 14001 } 14002 14003 /** 14004 * Sets a rectangular area on this view to which the view will be clipped 14005 * when it is drawn. Setting the value to null will remove the clip bounds 14006 * and the view will draw normally, using its full bounds. 14007 * 14008 * @param clipBounds The rectangular area, in the local coordinates of 14009 * this view, to which future drawing operations will be clipped. 14010 */ 14011 public void setClipBounds(Rect clipBounds) { 14012 if (clipBounds != null) { 14013 if (clipBounds.equals(mClipBounds)) { 14014 return; 14015 } 14016 if (mClipBounds == null) { 14017 invalidate(); 14018 mClipBounds = new Rect(clipBounds); 14019 } else { 14020 invalidate(Math.min(mClipBounds.left, clipBounds.left), 14021 Math.min(mClipBounds.top, clipBounds.top), 14022 Math.max(mClipBounds.right, clipBounds.right), 14023 Math.max(mClipBounds.bottom, clipBounds.bottom)); 14024 mClipBounds.set(clipBounds); 14025 } 14026 } else { 14027 if (mClipBounds != null) { 14028 invalidate(); 14029 mClipBounds = null; 14030 } 14031 } 14032 } 14033 14034 /** 14035 * Returns a copy of the current {@link #setClipBounds(Rect) clipBounds}. 14036 * 14037 * @return A copy of the current clip bounds if clip bounds are set, 14038 * otherwise null. 14039 */ 14040 public Rect getClipBounds() { 14041 return (mClipBounds != null) ? new Rect(mClipBounds) : null; 14042 } 14043 14044 /** 14045 * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common 14046 * case of an active Animation being run on the view. 14047 */ 14048 private boolean drawAnimation(ViewGroup parent, long drawingTime, 14049 Animation a, boolean scalingRequired) { 14050 Transformation invalidationTransform; 14051 final int flags = parent.mGroupFlags; 14052 final boolean initialized = a.isInitialized(); 14053 if (!initialized) { 14054 a.initialize(mRight - mLeft, mBottom - mTop, parent.getWidth(), parent.getHeight()); 14055 a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); 14056 if (mAttachInfo != null) a.setListenerHandler(mAttachInfo.mHandler); 14057 onAnimationStart(); 14058 } 14059 14060 final Transformation t = parent.getChildTransformation(); 14061 boolean more = a.getTransformation(drawingTime, t, 1f); 14062 if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { 14063 if (parent.mInvalidationTransformation == null) { 14064 parent.mInvalidationTransformation = new Transformation(); 14065 } 14066 invalidationTransform = parent.mInvalidationTransformation; 14067 a.getTransformation(drawingTime, invalidationTransform, 1f); 14068 } else { 14069 invalidationTransform = t; 14070 } 14071 14072 if (more) { 14073 if (!a.willChangeBounds()) { 14074 if ((flags & (ViewGroup.FLAG_OPTIMIZE_INVALIDATE | ViewGroup.FLAG_ANIMATION_DONE)) == 14075 ViewGroup.FLAG_OPTIMIZE_INVALIDATE) { 14076 parent.mGroupFlags |= ViewGroup.FLAG_INVALIDATE_REQUIRED; 14077 } else if ((flags & ViewGroup.FLAG_INVALIDATE_REQUIRED) == 0) { 14078 // The child need to draw an animation, potentially offscreen, so 14079 // make sure we do not cancel invalidate requests 14080 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 14081 parent.invalidate(mLeft, mTop, mRight, mBottom); 14082 } 14083 } else { 14084 if (parent.mInvalidateRegion == null) { 14085 parent.mInvalidateRegion = new RectF(); 14086 } 14087 final RectF region = parent.mInvalidateRegion; 14088 a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, 14089 invalidationTransform); 14090 14091 // The child need to draw an animation, potentially offscreen, so 14092 // make sure we do not cancel invalidate requests 14093 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 14094 14095 final int left = mLeft + (int) region.left; 14096 final int top = mTop + (int) region.top; 14097 parent.invalidate(left, top, left + (int) (region.width() + .5f), 14098 top + (int) (region.height() + .5f)); 14099 } 14100 } 14101 return more; 14102 } 14103 14104 /** 14105 * This method is called by getDisplayList() when a display list is created or re-rendered. 14106 * It sets or resets the current value of all properties on that display list (resetting is 14107 * necessary when a display list is being re-created, because we need to make sure that 14108 * previously-set transform values 14109 */ 14110 void setDisplayListProperties(DisplayList displayList) { 14111 if (displayList != null) { 14112 displayList.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 14113 displayList.setHasOverlappingRendering(hasOverlappingRendering()); 14114 if (mParent instanceof ViewGroup) { 14115 displayList.setClipToBounds( 14116 (((ViewGroup) mParent).mGroupFlags & ViewGroup.FLAG_CLIP_CHILDREN) != 0); 14117 } 14118 float alpha = 1; 14119 if (mParent instanceof ViewGroup && (((ViewGroup) mParent).mGroupFlags & 14120 ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 14121 ViewGroup parentVG = (ViewGroup) mParent; 14122 final Transformation t = parentVG.getChildTransformation(); 14123 if (parentVG.getChildStaticTransformation(this, t)) { 14124 final int transformType = t.getTransformationType(); 14125 if (transformType != Transformation.TYPE_IDENTITY) { 14126 if ((transformType & Transformation.TYPE_ALPHA) != 0) { 14127 alpha = t.getAlpha(); 14128 } 14129 if ((transformType & Transformation.TYPE_MATRIX) != 0) { 14130 displayList.setMatrix(t.getMatrix()); 14131 } 14132 } 14133 } 14134 } 14135 if (mTransformationInfo != null) { 14136 alpha *= getFinalAlpha(); 14137 if (alpha < 1) { 14138 final int multipliedAlpha = (int) (255 * alpha); 14139 if (onSetAlpha(multipliedAlpha)) { 14140 alpha = 1; 14141 } 14142 } 14143 displayList.setTransformationInfo(alpha, 14144 mTransformationInfo.mTranslationX, mTransformationInfo.mTranslationY, 14145 mTransformationInfo.mRotation, mTransformationInfo.mRotationX, 14146 mTransformationInfo.mRotationY, mTransformationInfo.mScaleX, 14147 mTransformationInfo.mScaleY); 14148 if (mTransformationInfo.mCamera == null) { 14149 mTransformationInfo.mCamera = new Camera(); 14150 mTransformationInfo.matrix3D = new Matrix(); 14151 } 14152 displayList.setCameraDistance(mTransformationInfo.mCamera.getLocationZ()); 14153 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == PFLAG_PIVOT_EXPLICITLY_SET) { 14154 displayList.setPivotX(getPivotX()); 14155 displayList.setPivotY(getPivotY()); 14156 } 14157 } else if (alpha < 1) { 14158 displayList.setAlpha(alpha); 14159 } 14160 } 14161 } 14162 14163 /** 14164 * This method is called by ViewGroup.drawChild() to have each child view draw itself. 14165 * This draw() method is an implementation detail and is not intended to be overridden or 14166 * to be called from anywhere else other than ViewGroup.drawChild(). 14167 */ 14168 boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { 14169 boolean useDisplayListProperties = mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 14170 boolean more = false; 14171 final boolean childHasIdentityMatrix = hasIdentityMatrix(); 14172 final int flags = parent.mGroupFlags; 14173 14174 if ((flags & ViewGroup.FLAG_CLEAR_TRANSFORMATION) == ViewGroup.FLAG_CLEAR_TRANSFORMATION) { 14175 parent.getChildTransformation().clear(); 14176 parent.mGroupFlags &= ~ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14177 } 14178 14179 Transformation transformToApply = null; 14180 boolean concatMatrix = false; 14181 14182 boolean scalingRequired = false; 14183 boolean caching; 14184 int layerType = getLayerType(); 14185 14186 final boolean hardwareAccelerated = canvas.isHardwareAccelerated(); 14187 if ((flags & ViewGroup.FLAG_CHILDREN_DRAWN_WITH_CACHE) != 0 || 14188 (flags & ViewGroup.FLAG_ALWAYS_DRAWN_WITH_CACHE) != 0) { 14189 caching = true; 14190 // Auto-scaled apps are not hw-accelerated, no need to set scaling flag on DisplayList 14191 if (mAttachInfo != null) scalingRequired = mAttachInfo.mScalingRequired; 14192 } else { 14193 caching = (layerType != LAYER_TYPE_NONE) || hardwareAccelerated; 14194 } 14195 14196 final Animation a = getAnimation(); 14197 if (a != null) { 14198 more = drawAnimation(parent, drawingTime, a, scalingRequired); 14199 concatMatrix = a.willChangeTransformationMatrix(); 14200 if (concatMatrix) { 14201 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 14202 } 14203 transformToApply = parent.getChildTransformation(); 14204 } else { 14205 if ((mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_TRANSFORM) == 14206 PFLAG3_VIEW_IS_ANIMATING_TRANSFORM && mDisplayList != null) { 14207 // No longer animating: clear out old animation matrix 14208 mDisplayList.setAnimationMatrix(null); 14209 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 14210 } 14211 if (!useDisplayListProperties && 14212 (flags & ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 14213 final Transformation t = parent.getChildTransformation(); 14214 final boolean hasTransform = parent.getChildStaticTransformation(this, t); 14215 if (hasTransform) { 14216 final int transformType = t.getTransformationType(); 14217 transformToApply = transformType != Transformation.TYPE_IDENTITY ? t : null; 14218 concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; 14219 } 14220 } 14221 } 14222 14223 concatMatrix |= !childHasIdentityMatrix; 14224 14225 // Sets the flag as early as possible to allow draw() implementations 14226 // to call invalidate() successfully when doing animations 14227 mPrivateFlags |= PFLAG_DRAWN; 14228 14229 if (!concatMatrix && 14230 (flags & (ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS | 14231 ViewGroup.FLAG_CLIP_CHILDREN)) == ViewGroup.FLAG_CLIP_CHILDREN && 14232 canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && 14233 (mPrivateFlags & PFLAG_DRAW_ANIMATION) == 0) { 14234 mPrivateFlags2 |= PFLAG2_VIEW_QUICK_REJECTED; 14235 return more; 14236 } 14237 mPrivateFlags2 &= ~PFLAG2_VIEW_QUICK_REJECTED; 14238 14239 if (hardwareAccelerated) { 14240 // Clear INVALIDATED flag to allow invalidation to occur during rendering, but 14241 // retain the flag's value temporarily in the mRecreateDisplayList flag 14242 mRecreateDisplayList = (mPrivateFlags & PFLAG_INVALIDATED) == PFLAG_INVALIDATED; 14243 mPrivateFlags &= ~PFLAG_INVALIDATED; 14244 } 14245 14246 DisplayList displayList = null; 14247 Bitmap cache = null; 14248 boolean hasDisplayList = false; 14249 if (caching) { 14250 if (!hardwareAccelerated) { 14251 if (layerType != LAYER_TYPE_NONE) { 14252 layerType = LAYER_TYPE_SOFTWARE; 14253 buildDrawingCache(true); 14254 } 14255 cache = getDrawingCache(true); 14256 } else { 14257 switch (layerType) { 14258 case LAYER_TYPE_SOFTWARE: 14259 if (useDisplayListProperties) { 14260 hasDisplayList = canHaveDisplayList(); 14261 } else { 14262 buildDrawingCache(true); 14263 cache = getDrawingCache(true); 14264 } 14265 break; 14266 case LAYER_TYPE_HARDWARE: 14267 if (useDisplayListProperties) { 14268 hasDisplayList = canHaveDisplayList(); 14269 } 14270 break; 14271 case LAYER_TYPE_NONE: 14272 // Delay getting the display list until animation-driven alpha values are 14273 // set up and possibly passed on to the view 14274 hasDisplayList = canHaveDisplayList(); 14275 break; 14276 } 14277 } 14278 } 14279 useDisplayListProperties &= hasDisplayList; 14280 if (useDisplayListProperties) { 14281 displayList = getDisplayList(); 14282 if (!displayList.isValid()) { 14283 // Uncommon, but possible. If a view is removed from the hierarchy during the call 14284 // to getDisplayList(), the display list will be marked invalid and we should not 14285 // try to use it again. 14286 displayList = null; 14287 hasDisplayList = false; 14288 useDisplayListProperties = false; 14289 } 14290 } 14291 14292 int sx = 0; 14293 int sy = 0; 14294 if (!hasDisplayList) { 14295 computeScroll(); 14296 sx = mScrollX; 14297 sy = mScrollY; 14298 } 14299 14300 final boolean hasNoCache = cache == null || hasDisplayList; 14301 final boolean offsetForScroll = cache == null && !hasDisplayList && 14302 layerType != LAYER_TYPE_HARDWARE; 14303 14304 int restoreTo = -1; 14305 if (!useDisplayListProperties || transformToApply != null) { 14306 restoreTo = canvas.save(); 14307 } 14308 if (offsetForScroll) { 14309 canvas.translate(mLeft - sx, mTop - sy); 14310 } else { 14311 if (!useDisplayListProperties) { 14312 canvas.translate(mLeft, mTop); 14313 } 14314 if (scalingRequired) { 14315 if (useDisplayListProperties) { 14316 // TODO: Might not need this if we put everything inside the DL 14317 restoreTo = canvas.save(); 14318 } 14319 // mAttachInfo cannot be null, otherwise scalingRequired == false 14320 final float scale = 1.0f / mAttachInfo.mApplicationScale; 14321 canvas.scale(scale, scale); 14322 } 14323 } 14324 14325 float alpha = useDisplayListProperties ? 1 : (getAlpha() * getTransitionAlpha()); 14326 if (transformToApply != null || alpha < 1 || !hasIdentityMatrix() || 14327 (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) == PFLAG3_VIEW_IS_ANIMATING_ALPHA) { 14328 if (transformToApply != null || !childHasIdentityMatrix) { 14329 int transX = 0; 14330 int transY = 0; 14331 14332 if (offsetForScroll) { 14333 transX = -sx; 14334 transY = -sy; 14335 } 14336 14337 if (transformToApply != null) { 14338 if (concatMatrix) { 14339 if (useDisplayListProperties) { 14340 displayList.setAnimationMatrix(transformToApply.getMatrix()); 14341 } else { 14342 // Undo the scroll translation, apply the transformation matrix, 14343 // then redo the scroll translate to get the correct result. 14344 canvas.translate(-transX, -transY); 14345 canvas.concat(transformToApply.getMatrix()); 14346 canvas.translate(transX, transY); 14347 } 14348 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14349 } 14350 14351 float transformAlpha = transformToApply.getAlpha(); 14352 if (transformAlpha < 1) { 14353 alpha *= transformAlpha; 14354 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14355 } 14356 } 14357 14358 if (!childHasIdentityMatrix && !useDisplayListProperties) { 14359 canvas.translate(-transX, -transY); 14360 canvas.concat(getMatrix()); 14361 canvas.translate(transX, transY); 14362 } 14363 } 14364 14365 // Deal with alpha if it is or used to be <1 14366 if (alpha < 1 || 14367 (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) == PFLAG3_VIEW_IS_ANIMATING_ALPHA) { 14368 if (alpha < 1) { 14369 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_ALPHA; 14370 } else { 14371 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_ALPHA; 14372 } 14373 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 14374 if (hasNoCache) { 14375 final int multipliedAlpha = (int) (255 * alpha); 14376 if (!onSetAlpha(multipliedAlpha)) { 14377 int layerFlags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 14378 if ((flags & ViewGroup.FLAG_CLIP_CHILDREN) != 0 || 14379 layerType != LAYER_TYPE_NONE) { 14380 layerFlags |= Canvas.CLIP_TO_LAYER_SAVE_FLAG; 14381 } 14382 if (useDisplayListProperties) { 14383 displayList.setAlpha(alpha * getAlpha() * getTransitionAlpha()); 14384 } else if (layerType == LAYER_TYPE_NONE) { 14385 final int scrollX = hasDisplayList ? 0 : sx; 14386 final int scrollY = hasDisplayList ? 0 : sy; 14387 canvas.saveLayerAlpha(scrollX, scrollY, scrollX + mRight - mLeft, 14388 scrollY + mBottom - mTop, multipliedAlpha, layerFlags); 14389 } 14390 } else { 14391 // Alpha is handled by the child directly, clobber the layer's alpha 14392 mPrivateFlags |= PFLAG_ALPHA_SET; 14393 } 14394 } 14395 } 14396 } else if ((mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 14397 onSetAlpha(255); 14398 mPrivateFlags &= ~PFLAG_ALPHA_SET; 14399 } 14400 14401 if ((flags & ViewGroup.FLAG_CLIP_CHILDREN) == ViewGroup.FLAG_CLIP_CHILDREN && 14402 !useDisplayListProperties && cache == null) { 14403 if (offsetForScroll) { 14404 canvas.clipRect(sx, sy, sx + (mRight - mLeft), sy + (mBottom - mTop)); 14405 } else { 14406 if (!scalingRequired || cache == null) { 14407 canvas.clipRect(0, 0, mRight - mLeft, mBottom - mTop); 14408 } else { 14409 canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); 14410 } 14411 } 14412 } 14413 14414 if (!useDisplayListProperties && hasDisplayList) { 14415 displayList = getDisplayList(); 14416 if (!displayList.isValid()) { 14417 // Uncommon, but possible. If a view is removed from the hierarchy during the call 14418 // to getDisplayList(), the display list will be marked invalid and we should not 14419 // try to use it again. 14420 displayList = null; 14421 hasDisplayList = false; 14422 } 14423 } 14424 14425 if (hasNoCache) { 14426 boolean layerRendered = false; 14427 if (layerType == LAYER_TYPE_HARDWARE && !useDisplayListProperties) { 14428 final HardwareLayer layer = getHardwareLayer(); 14429 if (layer != null && layer.isValid()) { 14430 mLayerPaint.setAlpha((int) (alpha * 255)); 14431 ((HardwareCanvas) canvas).drawHardwareLayer(layer, 0, 0, mLayerPaint); 14432 layerRendered = true; 14433 } else { 14434 final int scrollX = hasDisplayList ? 0 : sx; 14435 final int scrollY = hasDisplayList ? 0 : sy; 14436 canvas.saveLayer(scrollX, scrollY, 14437 scrollX + mRight - mLeft, scrollY + mBottom - mTop, mLayerPaint, 14438 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); 14439 } 14440 } 14441 14442 if (!layerRendered) { 14443 if (!hasDisplayList) { 14444 // Fast path for layouts with no backgrounds 14445 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 14446 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14447 dispatchDraw(canvas); 14448 } else { 14449 draw(canvas); 14450 } 14451 } else { 14452 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14453 ((HardwareCanvas) canvas).drawDisplayList(displayList, null, flags); 14454 } 14455 } 14456 } else if (cache != null) { 14457 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 14458 Paint cachePaint; 14459 14460 if (layerType == LAYER_TYPE_NONE) { 14461 cachePaint = parent.mCachePaint; 14462 if (cachePaint == null) { 14463 cachePaint = new Paint(); 14464 cachePaint.setDither(false); 14465 parent.mCachePaint = cachePaint; 14466 } 14467 if (alpha < 1) { 14468 cachePaint.setAlpha((int) (alpha * 255)); 14469 parent.mGroupFlags |= ViewGroup.FLAG_ALPHA_LOWER_THAN_ONE; 14470 } else if ((flags & ViewGroup.FLAG_ALPHA_LOWER_THAN_ONE) != 0) { 14471 cachePaint.setAlpha(255); 14472 parent.mGroupFlags &= ~ViewGroup.FLAG_ALPHA_LOWER_THAN_ONE; 14473 } 14474 } else { 14475 cachePaint = mLayerPaint; 14476 cachePaint.setAlpha((int) (alpha * 255)); 14477 } 14478 canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); 14479 } 14480 14481 if (restoreTo >= 0) { 14482 canvas.restoreToCount(restoreTo); 14483 } 14484 14485 if (a != null && !more) { 14486 if (!hardwareAccelerated && !a.getFillAfter()) { 14487 onSetAlpha(255); 14488 } 14489 parent.finishAnimatingView(this, a); 14490 } 14491 14492 if (more && hardwareAccelerated) { 14493 if (a.hasAlpha() && (mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 14494 // alpha animations should cause the child to recreate its display list 14495 invalidate(true); 14496 } 14497 } 14498 14499 mRecreateDisplayList = false; 14500 14501 return more; 14502 } 14503 14504 /** 14505 * Manually render this view (and all of its children) to the given Canvas. 14506 * The view must have already done a full layout before this function is 14507 * called. When implementing a view, implement 14508 * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. 14509 * If you do need to override this method, call the superclass version. 14510 * 14511 * @param canvas The Canvas to which the View is rendered. 14512 */ 14513 public void draw(Canvas canvas) { 14514 if (mClipBounds != null) { 14515 canvas.clipRect(mClipBounds); 14516 } 14517 final int privateFlags = mPrivateFlags; 14518 final boolean dirtyOpaque = (privateFlags & PFLAG_DIRTY_MASK) == PFLAG_DIRTY_OPAQUE && 14519 (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); 14520 mPrivateFlags = (privateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN; 14521 14522 /* 14523 * Draw traversal performs several drawing steps which must be executed 14524 * in the appropriate order: 14525 * 14526 * 1. Draw the background 14527 * 2. If necessary, save the canvas' layers to prepare for fading 14528 * 3. Draw view's content 14529 * 4. Draw children 14530 * 5. If necessary, draw the fading edges and restore layers 14531 * 6. Draw decorations (scrollbars for instance) 14532 */ 14533 14534 // Step 1, draw the background, if needed 14535 int saveCount; 14536 14537 if (!dirtyOpaque) { 14538 final Drawable background = mBackground; 14539 if (background != null) { 14540 final int scrollX = mScrollX; 14541 final int scrollY = mScrollY; 14542 14543 if (mBackgroundSizeChanged) { 14544 background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); 14545 mBackgroundSizeChanged = false; 14546 } 14547 14548 if ((scrollX | scrollY) == 0) { 14549 background.draw(canvas); 14550 } else { 14551 canvas.translate(scrollX, scrollY); 14552 background.draw(canvas); 14553 canvas.translate(-scrollX, -scrollY); 14554 } 14555 } 14556 } 14557 14558 // skip step 2 & 5 if possible (common case) 14559 final int viewFlags = mViewFlags; 14560 boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; 14561 boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; 14562 if (!verticalEdges && !horizontalEdges) { 14563 // Step 3, draw the content 14564 if (!dirtyOpaque) onDraw(canvas); 14565 14566 // Step 4, draw the children 14567 dispatchDraw(canvas); 14568 14569 // Step 6, draw decorations (scrollbars) 14570 onDrawScrollBars(canvas); 14571 14572 if (mOverlay != null && !mOverlay.isEmpty()) { 14573 mOverlay.getOverlayView().dispatchDraw(canvas); 14574 } 14575 14576 // we're done... 14577 return; 14578 } 14579 14580 /* 14581 * Here we do the full fledged routine... 14582 * (this is an uncommon case where speed matters less, 14583 * this is why we repeat some of the tests that have been 14584 * done above) 14585 */ 14586 14587 boolean drawTop = false; 14588 boolean drawBottom = false; 14589 boolean drawLeft = false; 14590 boolean drawRight = false; 14591 14592 float topFadeStrength = 0.0f; 14593 float bottomFadeStrength = 0.0f; 14594 float leftFadeStrength = 0.0f; 14595 float rightFadeStrength = 0.0f; 14596 14597 // Step 2, save the canvas' layers 14598 int paddingLeft = mPaddingLeft; 14599 14600 final boolean offsetRequired = isPaddingOffsetRequired(); 14601 if (offsetRequired) { 14602 paddingLeft += getLeftPaddingOffset(); 14603 } 14604 14605 int left = mScrollX + paddingLeft; 14606 int right = left + mRight - mLeft - mPaddingRight - paddingLeft; 14607 int top = mScrollY + getFadeTop(offsetRequired); 14608 int bottom = top + getFadeHeight(offsetRequired); 14609 14610 if (offsetRequired) { 14611 right += getRightPaddingOffset(); 14612 bottom += getBottomPaddingOffset(); 14613 } 14614 14615 final ScrollabilityCache scrollabilityCache = mScrollCache; 14616 final float fadeHeight = scrollabilityCache.fadingEdgeLength; 14617 int length = (int) fadeHeight; 14618 14619 // clip the fade length if top and bottom fades overlap 14620 // overlapping fades produce odd-looking artifacts 14621 if (verticalEdges && (top + length > bottom - length)) { 14622 length = (bottom - top) / 2; 14623 } 14624 14625 // also clip horizontal fades if necessary 14626 if (horizontalEdges && (left + length > right - length)) { 14627 length = (right - left) / 2; 14628 } 14629 14630 if (verticalEdges) { 14631 topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); 14632 drawTop = topFadeStrength * fadeHeight > 1.0f; 14633 bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); 14634 drawBottom = bottomFadeStrength * fadeHeight > 1.0f; 14635 } 14636 14637 if (horizontalEdges) { 14638 leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); 14639 drawLeft = leftFadeStrength * fadeHeight > 1.0f; 14640 rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); 14641 drawRight = rightFadeStrength * fadeHeight > 1.0f; 14642 } 14643 14644 saveCount = canvas.getSaveCount(); 14645 14646 int solidColor = getSolidColor(); 14647 if (solidColor == 0) { 14648 final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 14649 14650 if (drawTop) { 14651 canvas.saveLayer(left, top, right, top + length, null, flags); 14652 } 14653 14654 if (drawBottom) { 14655 canvas.saveLayer(left, bottom - length, right, bottom, null, flags); 14656 } 14657 14658 if (drawLeft) { 14659 canvas.saveLayer(left, top, left + length, bottom, null, flags); 14660 } 14661 14662 if (drawRight) { 14663 canvas.saveLayer(right - length, top, right, bottom, null, flags); 14664 } 14665 } else { 14666 scrollabilityCache.setFadeColor(solidColor); 14667 } 14668 14669 // Step 3, draw the content 14670 if (!dirtyOpaque) onDraw(canvas); 14671 14672 // Step 4, draw the children 14673 dispatchDraw(canvas); 14674 14675 // Step 5, draw the fade effect and restore layers 14676 final Paint p = scrollabilityCache.paint; 14677 final Matrix matrix = scrollabilityCache.matrix; 14678 final Shader fade = scrollabilityCache.shader; 14679 14680 if (drawTop) { 14681 matrix.setScale(1, fadeHeight * topFadeStrength); 14682 matrix.postTranslate(left, top); 14683 fade.setLocalMatrix(matrix); 14684 canvas.drawRect(left, top, right, top + length, p); 14685 } 14686 14687 if (drawBottom) { 14688 matrix.setScale(1, fadeHeight * bottomFadeStrength); 14689 matrix.postRotate(180); 14690 matrix.postTranslate(left, bottom); 14691 fade.setLocalMatrix(matrix); 14692 canvas.drawRect(left, bottom - length, right, bottom, p); 14693 } 14694 14695 if (drawLeft) { 14696 matrix.setScale(1, fadeHeight * leftFadeStrength); 14697 matrix.postRotate(-90); 14698 matrix.postTranslate(left, top); 14699 fade.setLocalMatrix(matrix); 14700 canvas.drawRect(left, top, left + length, bottom, p); 14701 } 14702 14703 if (drawRight) { 14704 matrix.setScale(1, fadeHeight * rightFadeStrength); 14705 matrix.postRotate(90); 14706 matrix.postTranslate(right, top); 14707 fade.setLocalMatrix(matrix); 14708 canvas.drawRect(right - length, top, right, bottom, p); 14709 } 14710 14711 canvas.restoreToCount(saveCount); 14712 14713 // Step 6, draw decorations (scrollbars) 14714 onDrawScrollBars(canvas); 14715 14716 if (mOverlay != null && !mOverlay.isEmpty()) { 14717 mOverlay.getOverlayView().dispatchDraw(canvas); 14718 } 14719 } 14720 14721 /** 14722 * Returns the overlay for this view, creating it if it does not yet exist. 14723 * Adding drawables to the overlay will cause them to be displayed whenever 14724 * the view itself is redrawn. Objects in the overlay should be actively 14725 * managed: remove them when they should not be displayed anymore. The 14726 * overlay will always have the same size as its host view. 14727 * 14728 * <p>Note: Overlays do not currently work correctly with {@link 14729 * SurfaceView} or {@link TextureView}; contents in overlays for these 14730 * types of views may not display correctly.</p> 14731 * 14732 * @return The ViewOverlay object for this view. 14733 * @see ViewOverlay 14734 */ 14735 public ViewOverlay getOverlay() { 14736 if (mOverlay == null) { 14737 mOverlay = new ViewOverlay(mContext, this); 14738 } 14739 return mOverlay; 14740 } 14741 14742 /** 14743 * Override this if your view is known to always be drawn on top of a solid color background, 14744 * and needs to draw fading edges. Returning a non-zero color enables the view system to 14745 * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha 14746 * should be set to 0xFF. 14747 * 14748 * @see #setVerticalFadingEdgeEnabled(boolean) 14749 * @see #setHorizontalFadingEdgeEnabled(boolean) 14750 * 14751 * @return The known solid color background for this view, or 0 if the color may vary 14752 */ 14753 @ViewDebug.ExportedProperty(category = "drawing") 14754 public int getSolidColor() { 14755 return 0; 14756 } 14757 14758 /** 14759 * Build a human readable string representation of the specified view flags. 14760 * 14761 * @param flags the view flags to convert to a string 14762 * @return a String representing the supplied flags 14763 */ 14764 private static String printFlags(int flags) { 14765 String output = ""; 14766 int numFlags = 0; 14767 if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { 14768 output += "TAKES_FOCUS"; 14769 numFlags++; 14770 } 14771 14772 switch (flags & VISIBILITY_MASK) { 14773 case INVISIBLE: 14774 if (numFlags > 0) { 14775 output += " "; 14776 } 14777 output += "INVISIBLE"; 14778 // USELESS HERE numFlags++; 14779 break; 14780 case GONE: 14781 if (numFlags > 0) { 14782 output += " "; 14783 } 14784 output += "GONE"; 14785 // USELESS HERE numFlags++; 14786 break; 14787 default: 14788 break; 14789 } 14790 return output; 14791 } 14792 14793 /** 14794 * Build a human readable string representation of the specified private 14795 * view flags. 14796 * 14797 * @param privateFlags the private view flags to convert to a string 14798 * @return a String representing the supplied flags 14799 */ 14800 private static String printPrivateFlags(int privateFlags) { 14801 String output = ""; 14802 int numFlags = 0; 14803 14804 if ((privateFlags & PFLAG_WANTS_FOCUS) == PFLAG_WANTS_FOCUS) { 14805 output += "WANTS_FOCUS"; 14806 numFlags++; 14807 } 14808 14809 if ((privateFlags & PFLAG_FOCUSED) == PFLAG_FOCUSED) { 14810 if (numFlags > 0) { 14811 output += " "; 14812 } 14813 output += "FOCUSED"; 14814 numFlags++; 14815 } 14816 14817 if ((privateFlags & PFLAG_SELECTED) == PFLAG_SELECTED) { 14818 if (numFlags > 0) { 14819 output += " "; 14820 } 14821 output += "SELECTED"; 14822 numFlags++; 14823 } 14824 14825 if ((privateFlags & PFLAG_IS_ROOT_NAMESPACE) == PFLAG_IS_ROOT_NAMESPACE) { 14826 if (numFlags > 0) { 14827 output += " "; 14828 } 14829 output += "IS_ROOT_NAMESPACE"; 14830 numFlags++; 14831 } 14832 14833 if ((privateFlags & PFLAG_HAS_BOUNDS) == PFLAG_HAS_BOUNDS) { 14834 if (numFlags > 0) { 14835 output += " "; 14836 } 14837 output += "HAS_BOUNDS"; 14838 numFlags++; 14839 } 14840 14841 if ((privateFlags & PFLAG_DRAWN) == PFLAG_DRAWN) { 14842 if (numFlags > 0) { 14843 output += " "; 14844 } 14845 output += "DRAWN"; 14846 // USELESS HERE numFlags++; 14847 } 14848 return output; 14849 } 14850 14851 /** 14852 * <p>Indicates whether or not this view's layout will be requested during 14853 * the next hierarchy layout pass.</p> 14854 * 14855 * @return true if the layout will be forced during next layout pass 14856 */ 14857 public boolean isLayoutRequested() { 14858 return (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; 14859 } 14860 14861 /** 14862 * Return true if o is a ViewGroup that is laying out using optical bounds. 14863 * @hide 14864 */ 14865 public static boolean isLayoutModeOptical(Object o) { 14866 return o instanceof ViewGroup && ((ViewGroup) o).isLayoutModeOptical(); 14867 } 14868 14869 private boolean setOpticalFrame(int left, int top, int right, int bottom) { 14870 Insets parentInsets = mParent instanceof View ? 14871 ((View) mParent).getOpticalInsets() : Insets.NONE; 14872 Insets childInsets = getOpticalInsets(); 14873 return setFrame( 14874 left + parentInsets.left - childInsets.left, 14875 top + parentInsets.top - childInsets.top, 14876 right + parentInsets.left + childInsets.right, 14877 bottom + parentInsets.top + childInsets.bottom); 14878 } 14879 14880 /** 14881 * Assign a size and position to a view and all of its 14882 * descendants 14883 * 14884 * <p>This is the second phase of the layout mechanism. 14885 * (The first is measuring). In this phase, each parent calls 14886 * layout on all of its children to position them. 14887 * This is typically done using the child measurements 14888 * that were stored in the measure pass().</p> 14889 * 14890 * <p>Derived classes should not override this method. 14891 * Derived classes with children should override 14892 * onLayout. In that method, they should 14893 * call layout on each of their children.</p> 14894 * 14895 * @param l Left position, relative to parent 14896 * @param t Top position, relative to parent 14897 * @param r Right position, relative to parent 14898 * @param b Bottom position, relative to parent 14899 */ 14900 @SuppressWarnings({"unchecked"}) 14901 public void layout(int l, int t, int r, int b) { 14902 if ((mPrivateFlags3 & PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT) != 0) { 14903 onMeasure(mOldWidthMeasureSpec, mOldHeightMeasureSpec); 14904 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 14905 } 14906 14907 int oldL = mLeft; 14908 int oldT = mTop; 14909 int oldB = mBottom; 14910 int oldR = mRight; 14911 14912 boolean changed = isLayoutModeOptical(mParent) ? 14913 setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b); 14914 14915 if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) { 14916 onLayout(changed, l, t, r, b); 14917 mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED; 14918 14919 ListenerInfo li = mListenerInfo; 14920 if (li != null && li.mOnLayoutChangeListeners != null) { 14921 ArrayList<OnLayoutChangeListener> listenersCopy = 14922 (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone(); 14923 int numListeners = listenersCopy.size(); 14924 for (int i = 0; i < numListeners; ++i) { 14925 listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); 14926 } 14927 } 14928 } 14929 14930 mPrivateFlags &= ~PFLAG_FORCE_LAYOUT; 14931 mPrivateFlags3 |= PFLAG3_IS_LAID_OUT; 14932 } 14933 14934 /** 14935 * Called from layout when this view should 14936 * assign a size and position to each of its children. 14937 * 14938 * Derived classes with children should override 14939 * this method and call layout on each of 14940 * their children. 14941 * @param changed This is a new size or position for this view 14942 * @param left Left position, relative to parent 14943 * @param top Top position, relative to parent 14944 * @param right Right position, relative to parent 14945 * @param bottom Bottom position, relative to parent 14946 */ 14947 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 14948 } 14949 14950 /** 14951 * Assign a size and position to this view. 14952 * 14953 * This is called from layout. 14954 * 14955 * @param left Left position, relative to parent 14956 * @param top Top position, relative to parent 14957 * @param right Right position, relative to parent 14958 * @param bottom Bottom position, relative to parent 14959 * @return true if the new size and position are different than the 14960 * previous ones 14961 * {@hide} 14962 */ 14963 protected boolean setFrame(int left, int top, int right, int bottom) { 14964 boolean changed = false; 14965 14966 if (DBG) { 14967 Log.d("View", this + " View.setFrame(" + left + "," + top + "," 14968 + right + "," + bottom + ")"); 14969 } 14970 14971 if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { 14972 changed = true; 14973 14974 // Remember our drawn bit 14975 int drawn = mPrivateFlags & PFLAG_DRAWN; 14976 14977 int oldWidth = mRight - mLeft; 14978 int oldHeight = mBottom - mTop; 14979 int newWidth = right - left; 14980 int newHeight = bottom - top; 14981 boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); 14982 14983 // Invalidate our old position 14984 invalidate(sizeChanged); 14985 14986 mLeft = left; 14987 mTop = top; 14988 mRight = right; 14989 mBottom = bottom; 14990 if (mDisplayList != null) { 14991 mDisplayList.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 14992 } 14993 14994 mPrivateFlags |= PFLAG_HAS_BOUNDS; 14995 14996 14997 if (sizeChanged) { 14998 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 14999 // A change in dimension means an auto-centered pivot point changes, too 15000 if (mTransformationInfo != null) { 15001 mTransformationInfo.mMatrixDirty = true; 15002 } 15003 } 15004 sizeChange(newWidth, newHeight, oldWidth, oldHeight); 15005 } 15006 15007 if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) { 15008 // If we are visible, force the DRAWN bit to on so that 15009 // this invalidate will go through (at least to our parent). 15010 // This is because someone may have invalidated this view 15011 // before this call to setFrame came in, thereby clearing 15012 // the DRAWN bit. 15013 mPrivateFlags |= PFLAG_DRAWN; 15014 invalidate(sizeChanged); 15015 // parent display list may need to be recreated based on a change in the bounds 15016 // of any child 15017 invalidateParentCaches(); 15018 } 15019 15020 // Reset drawn bit to original value (invalidate turns it off) 15021 mPrivateFlags |= drawn; 15022 15023 mBackgroundSizeChanged = true; 15024 15025 notifySubtreeAccessibilityStateChangedIfNeeded(); 15026 } 15027 return changed; 15028 } 15029 15030 private void sizeChange(int newWidth, int newHeight, int oldWidth, int oldHeight) { 15031 onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); 15032 if (mOverlay != null) { 15033 mOverlay.getOverlayView().setRight(newWidth); 15034 mOverlay.getOverlayView().setBottom(newHeight); 15035 } 15036 } 15037 15038 /** 15039 * Finalize inflating a view from XML. This is called as the last phase 15040 * of inflation, after all child views have been added. 15041 * 15042 * <p>Even if the subclass overrides onFinishInflate, they should always be 15043 * sure to call the super method, so that we get called. 15044 */ 15045 protected void onFinishInflate() { 15046 } 15047 15048 /** 15049 * Returns the resources associated with this view. 15050 * 15051 * @return Resources object. 15052 */ 15053 public Resources getResources() { 15054 return mResources; 15055 } 15056 15057 /** 15058 * Invalidates the specified Drawable. 15059 * 15060 * @param drawable the drawable to invalidate 15061 */ 15062 public void invalidateDrawable(Drawable drawable) { 15063 if (verifyDrawable(drawable)) { 15064 final Rect dirty = drawable.getBounds(); 15065 final int scrollX = mScrollX; 15066 final int scrollY = mScrollY; 15067 15068 invalidate(dirty.left + scrollX, dirty.top + scrollY, 15069 dirty.right + scrollX, dirty.bottom + scrollY); 15070 } 15071 } 15072 15073 /** 15074 * Schedules an action on a drawable to occur at a specified time. 15075 * 15076 * @param who the recipient of the action 15077 * @param what the action to run on the drawable 15078 * @param when the time at which the action must occur. Uses the 15079 * {@link SystemClock#uptimeMillis} timebase. 15080 */ 15081 public void scheduleDrawable(Drawable who, Runnable what, long when) { 15082 if (verifyDrawable(who) && what != null) { 15083 final long delay = when - SystemClock.uptimeMillis(); 15084 if (mAttachInfo != null) { 15085 mAttachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 15086 Choreographer.CALLBACK_ANIMATION, what, who, 15087 Choreographer.subtractFrameDelay(delay)); 15088 } else { 15089 ViewRootImpl.getRunQueue().postDelayed(what, delay); 15090 } 15091 } 15092 } 15093 15094 /** 15095 * Cancels a scheduled action on a drawable. 15096 * 15097 * @param who the recipient of the action 15098 * @param what the action to cancel 15099 */ 15100 public void unscheduleDrawable(Drawable who, Runnable what) { 15101 if (verifyDrawable(who) && what != null) { 15102 if (mAttachInfo != null) { 15103 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 15104 Choreographer.CALLBACK_ANIMATION, what, who); 15105 } 15106 ViewRootImpl.getRunQueue().removeCallbacks(what); 15107 } 15108 } 15109 15110 /** 15111 * Unschedule any events associated with the given Drawable. This can be 15112 * used when selecting a new Drawable into a view, so that the previous 15113 * one is completely unscheduled. 15114 * 15115 * @param who The Drawable to unschedule. 15116 * 15117 * @see #drawableStateChanged 15118 */ 15119 public void unscheduleDrawable(Drawable who) { 15120 if (mAttachInfo != null && who != null) { 15121 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 15122 Choreographer.CALLBACK_ANIMATION, null, who); 15123 } 15124 } 15125 15126 /** 15127 * Resolve the Drawables depending on the layout direction. This is implicitly supposing 15128 * that the View directionality can and will be resolved before its Drawables. 15129 * 15130 * Will call {@link View#onResolveDrawables} when resolution is done. 15131 * 15132 * @hide 15133 */ 15134 protected void resolveDrawables() { 15135 // Drawables resolution may need to happen before resolving the layout direction (which is 15136 // done only during the measure() call). 15137 // If the layout direction is not resolved yet, we cannot resolve the Drawables except in 15138 // one case: when the raw layout direction has not been defined as LAYOUT_DIRECTION_INHERIT. 15139 // So, if the raw layout direction is LAYOUT_DIRECTION_LTR or LAYOUT_DIRECTION_RTL or 15140 // LAYOUT_DIRECTION_LOCALE, we can "cheat" and we don't need to wait for the layout 15141 // direction to be resolved as its resolved value will be the same as its raw value. 15142 if (!isLayoutDirectionResolved() && 15143 getRawLayoutDirection() == View.LAYOUT_DIRECTION_INHERIT) { 15144 return; 15145 } 15146 15147 final int layoutDirection = isLayoutDirectionResolved() ? 15148 getLayoutDirection() : getRawLayoutDirection(); 15149 15150 if (mBackground != null) { 15151 mBackground.setLayoutDirection(layoutDirection); 15152 } 15153 mPrivateFlags2 |= PFLAG2_DRAWABLE_RESOLVED; 15154 onResolveDrawables(layoutDirection); 15155 } 15156 15157 /** 15158 * Called when layout direction has been resolved. 15159 * 15160 * The default implementation does nothing. 15161 * 15162 * @param layoutDirection The resolved layout direction. 15163 * 15164 * @see #LAYOUT_DIRECTION_LTR 15165 * @see #LAYOUT_DIRECTION_RTL 15166 * 15167 * @hide 15168 */ 15169 public void onResolveDrawables(@ResolvedLayoutDir int layoutDirection) { 15170 } 15171 15172 /** 15173 * @hide 15174 */ 15175 protected void resetResolvedDrawables() { 15176 mPrivateFlags2 &= ~PFLAG2_DRAWABLE_RESOLVED; 15177 } 15178 15179 private boolean isDrawablesResolved() { 15180 return (mPrivateFlags2 & PFLAG2_DRAWABLE_RESOLVED) == PFLAG2_DRAWABLE_RESOLVED; 15181 } 15182 15183 /** 15184 * If your view subclass is displaying its own Drawable objects, it should 15185 * override this function and return true for any Drawable it is 15186 * displaying. This allows animations for those drawables to be 15187 * scheduled. 15188 * 15189 * <p>Be sure to call through to the super class when overriding this 15190 * function. 15191 * 15192 * @param who The Drawable to verify. Return true if it is one you are 15193 * displaying, else return the result of calling through to the 15194 * super class. 15195 * 15196 * @return boolean If true than the Drawable is being displayed in the 15197 * view; else false and it is not allowed to animate. 15198 * 15199 * @see #unscheduleDrawable(android.graphics.drawable.Drawable) 15200 * @see #drawableStateChanged() 15201 */ 15202 protected boolean verifyDrawable(Drawable who) { 15203 return who == mBackground; 15204 } 15205 15206 /** 15207 * This function is called whenever the state of the view changes in such 15208 * a way that it impacts the state of drawables being shown. 15209 * 15210 * <p>Be sure to call through to the superclass when overriding this 15211 * function. 15212 * 15213 * @see Drawable#setState(int[]) 15214 */ 15215 protected void drawableStateChanged() { 15216 Drawable d = mBackground; 15217 if (d != null && d.isStateful()) { 15218 d.setState(getDrawableState()); 15219 } 15220 } 15221 15222 /** 15223 * Call this to force a view to update its drawable state. This will cause 15224 * drawableStateChanged to be called on this view. Views that are interested 15225 * in the new state should call getDrawableState. 15226 * 15227 * @see #drawableStateChanged 15228 * @see #getDrawableState 15229 */ 15230 public void refreshDrawableState() { 15231 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 15232 drawableStateChanged(); 15233 15234 ViewParent parent = mParent; 15235 if (parent != null) { 15236 parent.childDrawableStateChanged(this); 15237 } 15238 } 15239 15240 /** 15241 * Return an array of resource IDs of the drawable states representing the 15242 * current state of the view. 15243 * 15244 * @return The current drawable state 15245 * 15246 * @see Drawable#setState(int[]) 15247 * @see #drawableStateChanged() 15248 * @see #onCreateDrawableState(int) 15249 */ 15250 public final int[] getDrawableState() { 15251 if ((mDrawableState != null) && ((mPrivateFlags & PFLAG_DRAWABLE_STATE_DIRTY) == 0)) { 15252 return mDrawableState; 15253 } else { 15254 mDrawableState = onCreateDrawableState(0); 15255 mPrivateFlags &= ~PFLAG_DRAWABLE_STATE_DIRTY; 15256 return mDrawableState; 15257 } 15258 } 15259 15260 /** 15261 * Generate the new {@link android.graphics.drawable.Drawable} state for 15262 * this view. This is called by the view 15263 * system when the cached Drawable state is determined to be invalid. To 15264 * retrieve the current state, you should use {@link #getDrawableState}. 15265 * 15266 * @param extraSpace if non-zero, this is the number of extra entries you 15267 * would like in the returned array in which you can place your own 15268 * states. 15269 * 15270 * @return Returns an array holding the current {@link Drawable} state of 15271 * the view. 15272 * 15273 * @see #mergeDrawableStates(int[], int[]) 15274 */ 15275 protected int[] onCreateDrawableState(int extraSpace) { 15276 if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && 15277 mParent instanceof View) { 15278 return ((View) mParent).onCreateDrawableState(extraSpace); 15279 } 15280 15281 int[] drawableState; 15282 15283 int privateFlags = mPrivateFlags; 15284 15285 int viewStateIndex = 0; 15286 if ((privateFlags & PFLAG_PRESSED) != 0) viewStateIndex |= VIEW_STATE_PRESSED; 15287 if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= VIEW_STATE_ENABLED; 15288 if (isFocused()) viewStateIndex |= VIEW_STATE_FOCUSED; 15289 if ((privateFlags & PFLAG_SELECTED) != 0) viewStateIndex |= VIEW_STATE_SELECTED; 15290 if (hasWindowFocus()) viewStateIndex |= VIEW_STATE_WINDOW_FOCUSED; 15291 if ((privateFlags & PFLAG_ACTIVATED) != 0) viewStateIndex |= VIEW_STATE_ACTIVATED; 15292 if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && 15293 HardwareRenderer.isAvailable()) { 15294 // This is set if HW acceleration is requested, even if the current 15295 // process doesn't allow it. This is just to allow app preview 15296 // windows to better match their app. 15297 viewStateIndex |= VIEW_STATE_ACCELERATED; 15298 } 15299 if ((privateFlags & PFLAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_HOVERED; 15300 15301 final int privateFlags2 = mPrivateFlags2; 15302 if ((privateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0) viewStateIndex |= VIEW_STATE_DRAG_CAN_ACCEPT; 15303 if ((privateFlags2 & PFLAG2_DRAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_DRAG_HOVERED; 15304 15305 drawableState = VIEW_STATE_SETS[viewStateIndex]; 15306 15307 //noinspection ConstantIfStatement 15308 if (false) { 15309 Log.i("View", "drawableStateIndex=" + viewStateIndex); 15310 Log.i("View", toString() 15311 + " pressed=" + ((privateFlags & PFLAG_PRESSED) != 0) 15312 + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) 15313 + " fo=" + hasFocus() 15314 + " sl=" + ((privateFlags & PFLAG_SELECTED) != 0) 15315 + " wf=" + hasWindowFocus() 15316 + ": " + Arrays.toString(drawableState)); 15317 } 15318 15319 if (extraSpace == 0) { 15320 return drawableState; 15321 } 15322 15323 final int[] fullState; 15324 if (drawableState != null) { 15325 fullState = new int[drawableState.length + extraSpace]; 15326 System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); 15327 } else { 15328 fullState = new int[extraSpace]; 15329 } 15330 15331 return fullState; 15332 } 15333 15334 /** 15335 * Merge your own state values in <var>additionalState</var> into the base 15336 * state values <var>baseState</var> that were returned by 15337 * {@link #onCreateDrawableState(int)}. 15338 * 15339 * @param baseState The base state values returned by 15340 * {@link #onCreateDrawableState(int)}, which will be modified to also hold your 15341 * own additional state values. 15342 * 15343 * @param additionalState The additional state values you would like 15344 * added to <var>baseState</var>; this array is not modified. 15345 * 15346 * @return As a convenience, the <var>baseState</var> array you originally 15347 * passed into the function is returned. 15348 * 15349 * @see #onCreateDrawableState(int) 15350 */ 15351 protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { 15352 final int N = baseState.length; 15353 int i = N - 1; 15354 while (i >= 0 && baseState[i] == 0) { 15355 i--; 15356 } 15357 System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); 15358 return baseState; 15359 } 15360 15361 /** 15362 * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} 15363 * on all Drawable objects associated with this view. 15364 */ 15365 public void jumpDrawablesToCurrentState() { 15366 if (mBackground != null) { 15367 mBackground.jumpToCurrentState(); 15368 } 15369 } 15370 15371 /** 15372 * Sets the background color for this view. 15373 * @param color the color of the background 15374 */ 15375 @RemotableViewMethod 15376 public void setBackgroundColor(int color) { 15377 if (mBackground instanceof ColorDrawable) { 15378 ((ColorDrawable) mBackground.mutate()).setColor(color); 15379 computeOpaqueFlags(); 15380 mBackgroundResource = 0; 15381 } else { 15382 setBackground(new ColorDrawable(color)); 15383 } 15384 } 15385 15386 /** 15387 * Set the background to a given resource. The resource should refer to 15388 * a Drawable object or 0 to remove the background. 15389 * @param resid The identifier of the resource. 15390 * 15391 * @attr ref android.R.styleable#View_background 15392 */ 15393 @RemotableViewMethod 15394 public void setBackgroundResource(int resid) { 15395 if (resid != 0 && resid == mBackgroundResource) { 15396 return; 15397 } 15398 15399 Drawable d= null; 15400 if (resid != 0) { 15401 d = mResources.getDrawable(resid); 15402 } 15403 setBackground(d); 15404 15405 mBackgroundResource = resid; 15406 } 15407 15408 /** 15409 * Set the background to a given Drawable, or remove the background. If the 15410 * background has padding, this View's padding is set to the background's 15411 * padding. However, when a background is removed, this View's padding isn't 15412 * touched. If setting the padding is desired, please use 15413 * {@link #setPadding(int, int, int, int)}. 15414 * 15415 * @param background The Drawable to use as the background, or null to remove the 15416 * background 15417 */ 15418 public void setBackground(Drawable background) { 15419 //noinspection deprecation 15420 setBackgroundDrawable(background); 15421 } 15422 15423 /** 15424 * @deprecated use {@link #setBackground(Drawable)} instead 15425 */ 15426 @Deprecated 15427 public void setBackgroundDrawable(Drawable background) { 15428 computeOpaqueFlags(); 15429 15430 if (background == mBackground) { 15431 return; 15432 } 15433 15434 boolean requestLayout = false; 15435 15436 mBackgroundResource = 0; 15437 15438 /* 15439 * Regardless of whether we're setting a new background or not, we want 15440 * to clear the previous drawable. 15441 */ 15442 if (mBackground != null) { 15443 mBackground.setCallback(null); 15444 unscheduleDrawable(mBackground); 15445 } 15446 15447 if (background != null) { 15448 Rect padding = sThreadLocal.get(); 15449 if (padding == null) { 15450 padding = new Rect(); 15451 sThreadLocal.set(padding); 15452 } 15453 resetResolvedDrawables(); 15454 background.setLayoutDirection(getLayoutDirection()); 15455 if (background.getPadding(padding)) { 15456 resetResolvedPadding(); 15457 switch (background.getLayoutDirection()) { 15458 case LAYOUT_DIRECTION_RTL: 15459 mUserPaddingLeftInitial = padding.right; 15460 mUserPaddingRightInitial = padding.left; 15461 internalSetPadding(padding.right, padding.top, padding.left, padding.bottom); 15462 break; 15463 case LAYOUT_DIRECTION_LTR: 15464 default: 15465 mUserPaddingLeftInitial = padding.left; 15466 mUserPaddingRightInitial = padding.right; 15467 internalSetPadding(padding.left, padding.top, padding.right, padding.bottom); 15468 } 15469 mLeftPaddingDefined = false; 15470 mRightPaddingDefined = false; 15471 } 15472 15473 // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or 15474 // if it has a different minimum size, we should layout again 15475 if (mBackground == null || mBackground.getMinimumHeight() != background.getMinimumHeight() || 15476 mBackground.getMinimumWidth() != background.getMinimumWidth()) { 15477 requestLayout = true; 15478 } 15479 15480 background.setCallback(this); 15481 if (background.isStateful()) { 15482 background.setState(getDrawableState()); 15483 } 15484 background.setVisible(getVisibility() == VISIBLE, false); 15485 mBackground = background; 15486 15487 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 15488 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 15489 mPrivateFlags |= PFLAG_ONLY_DRAWS_BACKGROUND; 15490 requestLayout = true; 15491 } 15492 } else { 15493 /* Remove the background */ 15494 mBackground = null; 15495 15496 if ((mPrivateFlags & PFLAG_ONLY_DRAWS_BACKGROUND) != 0) { 15497 /* 15498 * This view ONLY drew the background before and we're removing 15499 * the background, so now it won't draw anything 15500 * (hence we SKIP_DRAW) 15501 */ 15502 mPrivateFlags &= ~PFLAG_ONLY_DRAWS_BACKGROUND; 15503 mPrivateFlags |= PFLAG_SKIP_DRAW; 15504 } 15505 15506 /* 15507 * When the background is set, we try to apply its padding to this 15508 * View. When the background is removed, we don't touch this View's 15509 * padding. This is noted in the Javadocs. Hence, we don't need to 15510 * requestLayout(), the invalidate() below is sufficient. 15511 */ 15512 15513 // The old background's minimum size could have affected this 15514 // View's layout, so let's requestLayout 15515 requestLayout = true; 15516 } 15517 15518 computeOpaqueFlags(); 15519 15520 if (requestLayout) { 15521 requestLayout(); 15522 } 15523 15524 mBackgroundSizeChanged = true; 15525 invalidate(true); 15526 } 15527 15528 /** 15529 * Gets the background drawable 15530 * 15531 * @return The drawable used as the background for this view, if any. 15532 * 15533 * @see #setBackground(Drawable) 15534 * 15535 * @attr ref android.R.styleable#View_background 15536 */ 15537 public Drawable getBackground() { 15538 return mBackground; 15539 } 15540 15541 /** 15542 * Sets the padding. The view may add on the space required to display 15543 * the scrollbars, depending on the style and visibility of the scrollbars. 15544 * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, 15545 * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different 15546 * from the values set in this call. 15547 * 15548 * @attr ref android.R.styleable#View_padding 15549 * @attr ref android.R.styleable#View_paddingBottom 15550 * @attr ref android.R.styleable#View_paddingLeft 15551 * @attr ref android.R.styleable#View_paddingRight 15552 * @attr ref android.R.styleable#View_paddingTop 15553 * @param left the left padding in pixels 15554 * @param top the top padding in pixels 15555 * @param right the right padding in pixels 15556 * @param bottom the bottom padding in pixels 15557 */ 15558 public void setPadding(int left, int top, int right, int bottom) { 15559 resetResolvedPadding(); 15560 15561 mUserPaddingStart = UNDEFINED_PADDING; 15562 mUserPaddingEnd = UNDEFINED_PADDING; 15563 15564 mUserPaddingLeftInitial = left; 15565 mUserPaddingRightInitial = right; 15566 15567 mLeftPaddingDefined = true; 15568 mRightPaddingDefined = true; 15569 15570 internalSetPadding(left, top, right, bottom); 15571 } 15572 15573 /** 15574 * @hide 15575 */ 15576 protected void internalSetPadding(int left, int top, int right, int bottom) { 15577 mUserPaddingLeft = left; 15578 mUserPaddingRight = right; 15579 mUserPaddingBottom = bottom; 15580 15581 final int viewFlags = mViewFlags; 15582 boolean changed = false; 15583 15584 // Common case is there are no scroll bars. 15585 if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { 15586 if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { 15587 final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 15588 ? 0 : getVerticalScrollbarWidth(); 15589 switch (mVerticalScrollbarPosition) { 15590 case SCROLLBAR_POSITION_DEFAULT: 15591 if (isLayoutRtl()) { 15592 left += offset; 15593 } else { 15594 right += offset; 15595 } 15596 break; 15597 case SCROLLBAR_POSITION_RIGHT: 15598 right += offset; 15599 break; 15600 case SCROLLBAR_POSITION_LEFT: 15601 left += offset; 15602 break; 15603 } 15604 } 15605 if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { 15606 bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 15607 ? 0 : getHorizontalScrollbarHeight(); 15608 } 15609 } 15610 15611 if (mPaddingLeft != left) { 15612 changed = true; 15613 mPaddingLeft = left; 15614 } 15615 if (mPaddingTop != top) { 15616 changed = true; 15617 mPaddingTop = top; 15618 } 15619 if (mPaddingRight != right) { 15620 changed = true; 15621 mPaddingRight = right; 15622 } 15623 if (mPaddingBottom != bottom) { 15624 changed = true; 15625 mPaddingBottom = bottom; 15626 } 15627 15628 if (changed) { 15629 requestLayout(); 15630 } 15631 } 15632 15633 /** 15634 * Sets the relative padding. The view may add on the space required to display 15635 * the scrollbars, depending on the style and visibility of the scrollbars. 15636 * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, 15637 * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different 15638 * from the values set in this call. 15639 * 15640 * @attr ref android.R.styleable#View_padding 15641 * @attr ref android.R.styleable#View_paddingBottom 15642 * @attr ref android.R.styleable#View_paddingStart 15643 * @attr ref android.R.styleable#View_paddingEnd 15644 * @attr ref android.R.styleable#View_paddingTop 15645 * @param start the start padding in pixels 15646 * @param top the top padding in pixels 15647 * @param end the end padding in pixels 15648 * @param bottom the bottom padding in pixels 15649 */ 15650 public void setPaddingRelative(int start, int top, int end, int bottom) { 15651 resetResolvedPadding(); 15652 15653 mUserPaddingStart = start; 15654 mUserPaddingEnd = end; 15655 mLeftPaddingDefined = true; 15656 mRightPaddingDefined = true; 15657 15658 switch(getLayoutDirection()) { 15659 case LAYOUT_DIRECTION_RTL: 15660 mUserPaddingLeftInitial = end; 15661 mUserPaddingRightInitial = start; 15662 internalSetPadding(end, top, start, bottom); 15663 break; 15664 case LAYOUT_DIRECTION_LTR: 15665 default: 15666 mUserPaddingLeftInitial = start; 15667 mUserPaddingRightInitial = end; 15668 internalSetPadding(start, top, end, bottom); 15669 } 15670 } 15671 15672 /** 15673 * Returns the top padding of this view. 15674 * 15675 * @return the top padding in pixels 15676 */ 15677 public int getPaddingTop() { 15678 return mPaddingTop; 15679 } 15680 15681 /** 15682 * Returns the bottom padding of this view. If there are inset and enabled 15683 * scrollbars, this value may include the space required to display the 15684 * scrollbars as well. 15685 * 15686 * @return the bottom padding in pixels 15687 */ 15688 public int getPaddingBottom() { 15689 return mPaddingBottom; 15690 } 15691 15692 /** 15693 * Returns the left padding of this view. If there are inset and enabled 15694 * scrollbars, this value may include the space required to display the 15695 * scrollbars as well. 15696 * 15697 * @return the left padding in pixels 15698 */ 15699 public int getPaddingLeft() { 15700 if (!isPaddingResolved()) { 15701 resolvePadding(); 15702 } 15703 return mPaddingLeft; 15704 } 15705 15706 /** 15707 * Returns the start padding of this view depending on its resolved layout direction. 15708 * If there are inset and enabled scrollbars, this value may include the space 15709 * required to display the scrollbars as well. 15710 * 15711 * @return the start padding in pixels 15712 */ 15713 public int getPaddingStart() { 15714 if (!isPaddingResolved()) { 15715 resolvePadding(); 15716 } 15717 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 15718 mPaddingRight : mPaddingLeft; 15719 } 15720 15721 /** 15722 * Returns the right padding of this view. If there are inset and enabled 15723 * scrollbars, this value may include the space required to display the 15724 * scrollbars as well. 15725 * 15726 * @return the right padding in pixels 15727 */ 15728 public int getPaddingRight() { 15729 if (!isPaddingResolved()) { 15730 resolvePadding(); 15731 } 15732 return mPaddingRight; 15733 } 15734 15735 /** 15736 * Returns the end padding of this view depending on its resolved layout direction. 15737 * If there are inset and enabled scrollbars, this value may include the space 15738 * required to display the scrollbars as well. 15739 * 15740 * @return the end padding in pixels 15741 */ 15742 public int getPaddingEnd() { 15743 if (!isPaddingResolved()) { 15744 resolvePadding(); 15745 } 15746 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 15747 mPaddingLeft : mPaddingRight; 15748 } 15749 15750 /** 15751 * Return if the padding as been set thru relative values 15752 * {@link #setPaddingRelative(int, int, int, int)} or thru 15753 * @attr ref android.R.styleable#View_paddingStart or 15754 * @attr ref android.R.styleable#View_paddingEnd 15755 * 15756 * @return true if the padding is relative or false if it is not. 15757 */ 15758 public boolean isPaddingRelative() { 15759 return (mUserPaddingStart != UNDEFINED_PADDING || mUserPaddingEnd != UNDEFINED_PADDING); 15760 } 15761 15762 Insets computeOpticalInsets() { 15763 return (mBackground == null) ? Insets.NONE : mBackground.getOpticalInsets(); 15764 } 15765 15766 /** 15767 * @hide 15768 */ 15769 public void resetPaddingToInitialValues() { 15770 if (isRtlCompatibilityMode()) { 15771 mPaddingLeft = mUserPaddingLeftInitial; 15772 mPaddingRight = mUserPaddingRightInitial; 15773 return; 15774 } 15775 if (isLayoutRtl()) { 15776 mPaddingLeft = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingLeftInitial; 15777 mPaddingRight = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingRightInitial; 15778 } else { 15779 mPaddingLeft = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingLeftInitial; 15780 mPaddingRight = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingRightInitial; 15781 } 15782 } 15783 15784 /** 15785 * @hide 15786 */ 15787 public Insets getOpticalInsets() { 15788 if (mLayoutInsets == null) { 15789 mLayoutInsets = computeOpticalInsets(); 15790 } 15791 return mLayoutInsets; 15792 } 15793 15794 /** 15795 * Changes the selection state of this view. A view can be selected or not. 15796 * Note that selection is not the same as focus. Views are typically 15797 * selected in the context of an AdapterView like ListView or GridView; 15798 * the selected view is the view that is highlighted. 15799 * 15800 * @param selected true if the view must be selected, false otherwise 15801 */ 15802 public void setSelected(boolean selected) { 15803 //noinspection DoubleNegation 15804 if (((mPrivateFlags & PFLAG_SELECTED) != 0) != selected) { 15805 mPrivateFlags = (mPrivateFlags & ~PFLAG_SELECTED) | (selected ? PFLAG_SELECTED : 0); 15806 if (!selected) resetPressedState(); 15807 invalidate(true); 15808 refreshDrawableState(); 15809 dispatchSetSelected(selected); 15810 notifyViewAccessibilityStateChangedIfNeeded( 15811 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 15812 } 15813 } 15814 15815 /** 15816 * Dispatch setSelected to all of this View's children. 15817 * 15818 * @see #setSelected(boolean) 15819 * 15820 * @param selected The new selected state 15821 */ 15822 protected void dispatchSetSelected(boolean selected) { 15823 } 15824 15825 /** 15826 * Indicates the selection state of this view. 15827 * 15828 * @return true if the view is selected, false otherwise 15829 */ 15830 @ViewDebug.ExportedProperty 15831 public boolean isSelected() { 15832 return (mPrivateFlags & PFLAG_SELECTED) != 0; 15833 } 15834 15835 /** 15836 * Changes the activated state of this view. A view can be activated or not. 15837 * Note that activation is not the same as selection. Selection is 15838 * a transient property, representing the view (hierarchy) the user is 15839 * currently interacting with. Activation is a longer-term state that the 15840 * user can move views in and out of. For example, in a list view with 15841 * single or multiple selection enabled, the views in the current selection 15842 * set are activated. (Um, yeah, we are deeply sorry about the terminology 15843 * here.) The activated state is propagated down to children of the view it 15844 * is set on. 15845 * 15846 * @param activated true if the view must be activated, false otherwise 15847 */ 15848 public void setActivated(boolean activated) { 15849 //noinspection DoubleNegation 15850 if (((mPrivateFlags & PFLAG_ACTIVATED) != 0) != activated) { 15851 mPrivateFlags = (mPrivateFlags & ~PFLAG_ACTIVATED) | (activated ? PFLAG_ACTIVATED : 0); 15852 invalidate(true); 15853 refreshDrawableState(); 15854 dispatchSetActivated(activated); 15855 } 15856 } 15857 15858 /** 15859 * Dispatch setActivated to all of this View's children. 15860 * 15861 * @see #setActivated(boolean) 15862 * 15863 * @param activated The new activated state 15864 */ 15865 protected void dispatchSetActivated(boolean activated) { 15866 } 15867 15868 /** 15869 * Indicates the activation state of this view. 15870 * 15871 * @return true if the view is activated, false otherwise 15872 */ 15873 @ViewDebug.ExportedProperty 15874 public boolean isActivated() { 15875 return (mPrivateFlags & PFLAG_ACTIVATED) != 0; 15876 } 15877 15878 /** 15879 * Returns the ViewTreeObserver for this view's hierarchy. The view tree 15880 * observer can be used to get notifications when global events, like 15881 * layout, happen. 15882 * 15883 * The returned ViewTreeObserver observer is not guaranteed to remain 15884 * valid for the lifetime of this View. If the caller of this method keeps 15885 * a long-lived reference to ViewTreeObserver, it should always check for 15886 * the return value of {@link ViewTreeObserver#isAlive()}. 15887 * 15888 * @return The ViewTreeObserver for this view's hierarchy. 15889 */ 15890 public ViewTreeObserver getViewTreeObserver() { 15891 if (mAttachInfo != null) { 15892 return mAttachInfo.mTreeObserver; 15893 } 15894 if (mFloatingTreeObserver == null) { 15895 mFloatingTreeObserver = new ViewTreeObserver(); 15896 } 15897 return mFloatingTreeObserver; 15898 } 15899 15900 /** 15901 * <p>Finds the topmost view in the current view hierarchy.</p> 15902 * 15903 * @return the topmost view containing this view 15904 */ 15905 public View getRootView() { 15906 if (mAttachInfo != null) { 15907 final View v = mAttachInfo.mRootView; 15908 if (v != null) { 15909 return v; 15910 } 15911 } 15912 15913 View parent = this; 15914 15915 while (parent.mParent != null && parent.mParent instanceof View) { 15916 parent = (View) parent.mParent; 15917 } 15918 15919 return parent; 15920 } 15921 15922 /** 15923 * Transforms a motion event from view-local coordinates to on-screen 15924 * coordinates. 15925 * 15926 * @param ev the view-local motion event 15927 * @return false if the transformation could not be applied 15928 * @hide 15929 */ 15930 public boolean toGlobalMotionEvent(MotionEvent ev) { 15931 final AttachInfo info = mAttachInfo; 15932 if (info == null) { 15933 return false; 15934 } 15935 15936 final Matrix m = info.mTmpMatrix; 15937 m.set(Matrix.IDENTITY_MATRIX); 15938 transformMatrixToGlobal(m); 15939 ev.transform(m); 15940 return true; 15941 } 15942 15943 /** 15944 * Transforms a motion event from on-screen coordinates to view-local 15945 * coordinates. 15946 * 15947 * @param ev the on-screen motion event 15948 * @return false if the transformation could not be applied 15949 * @hide 15950 */ 15951 public boolean toLocalMotionEvent(MotionEvent ev) { 15952 final AttachInfo info = mAttachInfo; 15953 if (info == null) { 15954 return false; 15955 } 15956 15957 final Matrix m = info.mTmpMatrix; 15958 m.set(Matrix.IDENTITY_MATRIX); 15959 transformMatrixToLocal(m); 15960 ev.transform(m); 15961 return true; 15962 } 15963 15964 /** 15965 * Modifies the input matrix such that it maps view-local coordinates to 15966 * on-screen coordinates. 15967 * 15968 * @param m input matrix to modify 15969 */ 15970 void transformMatrixToGlobal(Matrix m) { 15971 final ViewParent parent = mParent; 15972 if (parent instanceof View) { 15973 final View vp = (View) parent; 15974 vp.transformMatrixToGlobal(m); 15975 m.postTranslate(-vp.mScrollX, -vp.mScrollY); 15976 } else if (parent instanceof ViewRootImpl) { 15977 final ViewRootImpl vr = (ViewRootImpl) parent; 15978 vr.transformMatrixToGlobal(m); 15979 m.postTranslate(0, -vr.mCurScrollY); 15980 } 15981 15982 m.postTranslate(mLeft, mTop); 15983 15984 if (!hasIdentityMatrix()) { 15985 m.postConcat(getMatrix()); 15986 } 15987 } 15988 15989 /** 15990 * Modifies the input matrix such that it maps on-screen coordinates to 15991 * view-local coordinates. 15992 * 15993 * @param m input matrix to modify 15994 */ 15995 void transformMatrixToLocal(Matrix m) { 15996 final ViewParent parent = mParent; 15997 if (parent instanceof View) { 15998 final View vp = (View) parent; 15999 vp.transformMatrixToLocal(m); 16000 m.preTranslate(vp.mScrollX, vp.mScrollY); 16001 } else if (parent instanceof ViewRootImpl) { 16002 final ViewRootImpl vr = (ViewRootImpl) parent; 16003 vr.transformMatrixToLocal(m); 16004 m.preTranslate(0, vr.mCurScrollY); 16005 } 16006 16007 m.preTranslate(-mLeft, -mTop); 16008 16009 if (!hasIdentityMatrix()) { 16010 m.preConcat(getInverseMatrix()); 16011 } 16012 } 16013 16014 /** 16015 * <p>Computes the coordinates of this view on the screen. The argument 16016 * must be an array of two integers. After the method returns, the array 16017 * contains the x and y location in that order.</p> 16018 * 16019 * @param location an array of two integers in which to hold the coordinates 16020 */ 16021 public void getLocationOnScreen(int[] location) { 16022 getLocationInWindow(location); 16023 16024 final AttachInfo info = mAttachInfo; 16025 if (info != null) { 16026 location[0] += info.mWindowLeft; 16027 location[1] += info.mWindowTop; 16028 } 16029 } 16030 16031 /** 16032 * <p>Computes the coordinates of this view in its window. The argument 16033 * must be an array of two integers. After the method returns, the array 16034 * contains the x and y location in that order.</p> 16035 * 16036 * @param location an array of two integers in which to hold the coordinates 16037 */ 16038 public void getLocationInWindow(int[] location) { 16039 if (location == null || location.length < 2) { 16040 throw new IllegalArgumentException("location must be an array of two integers"); 16041 } 16042 16043 if (mAttachInfo == null) { 16044 // When the view is not attached to a window, this method does not make sense 16045 location[0] = location[1] = 0; 16046 return; 16047 } 16048 16049 float[] position = mAttachInfo.mTmpTransformLocation; 16050 position[0] = position[1] = 0.0f; 16051 16052 if (!hasIdentityMatrix()) { 16053 getMatrix().mapPoints(position); 16054 } 16055 16056 position[0] += mLeft; 16057 position[1] += mTop; 16058 16059 ViewParent viewParent = mParent; 16060 while (viewParent instanceof View) { 16061 final View view = (View) viewParent; 16062 16063 position[0] -= view.mScrollX; 16064 position[1] -= view.mScrollY; 16065 16066 if (!view.hasIdentityMatrix()) { 16067 view.getMatrix().mapPoints(position); 16068 } 16069 16070 position[0] += view.mLeft; 16071 position[1] += view.mTop; 16072 16073 viewParent = view.mParent; 16074 } 16075 16076 if (viewParent instanceof ViewRootImpl) { 16077 // *cough* 16078 final ViewRootImpl vr = (ViewRootImpl) viewParent; 16079 position[1] -= vr.mCurScrollY; 16080 } 16081 16082 location[0] = (int) (position[0] + 0.5f); 16083 location[1] = (int) (position[1] + 0.5f); 16084 } 16085 16086 /** 16087 * {@hide} 16088 * @param id the id of the view to be found 16089 * @return the view of the specified id, null if cannot be found 16090 */ 16091 protected View findViewTraversal(int id) { 16092 if (id == mID) { 16093 return this; 16094 } 16095 return null; 16096 } 16097 16098 /** 16099 * {@hide} 16100 * @param tag the tag of the view to be found 16101 * @return the view of specified tag, null if cannot be found 16102 */ 16103 protected View findViewWithTagTraversal(Object tag) { 16104 if (tag != null && tag.equals(mTag)) { 16105 return this; 16106 } 16107 return null; 16108 } 16109 16110 /** 16111 * {@hide} 16112 * @param predicate The predicate to evaluate. 16113 * @param childToSkip If not null, ignores this child during the recursive traversal. 16114 * @return The first view that matches the predicate or null. 16115 */ 16116 protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 16117 if (predicate.apply(this)) { 16118 return this; 16119 } 16120 return null; 16121 } 16122 16123 /** 16124 * Look for a child view with the given id. If this view has the given 16125 * id, return this view. 16126 * 16127 * @param id The id to search for. 16128 * @return The view that has the given id in the hierarchy or null 16129 */ 16130 public final View findViewById(int id) { 16131 if (id < 0) { 16132 return null; 16133 } 16134 return findViewTraversal(id); 16135 } 16136 16137 /** 16138 * Finds a view by its unuque and stable accessibility id. 16139 * 16140 * @param accessibilityId The searched accessibility id. 16141 * @return The found view. 16142 */ 16143 final View findViewByAccessibilityId(int accessibilityId) { 16144 if (accessibilityId < 0) { 16145 return null; 16146 } 16147 return findViewByAccessibilityIdTraversal(accessibilityId); 16148 } 16149 16150 /** 16151 * Performs the traversal to find a view by its unuque and stable accessibility id. 16152 * 16153 * <strong>Note:</strong>This method does not stop at the root namespace 16154 * boundary since the user can touch the screen at an arbitrary location 16155 * potentially crossing the root namespace bounday which will send an 16156 * accessibility event to accessibility services and they should be able 16157 * to obtain the event source. Also accessibility ids are guaranteed to be 16158 * unique in the window. 16159 * 16160 * @param accessibilityId The accessibility id. 16161 * @return The found view. 16162 * 16163 * @hide 16164 */ 16165 public View findViewByAccessibilityIdTraversal(int accessibilityId) { 16166 if (getAccessibilityViewId() == accessibilityId) { 16167 return this; 16168 } 16169 return null; 16170 } 16171 16172 /** 16173 * Look for a child view with the given tag. If this view has the given 16174 * tag, return this view. 16175 * 16176 * @param tag The tag to search for, using "tag.equals(getTag())". 16177 * @return The View that has the given tag in the hierarchy or null 16178 */ 16179 public final View findViewWithTag(Object tag) { 16180 if (tag == null) { 16181 return null; 16182 } 16183 return findViewWithTagTraversal(tag); 16184 } 16185 16186 /** 16187 * {@hide} 16188 * Look for a child view that matches the specified predicate. 16189 * If this view matches the predicate, return this view. 16190 * 16191 * @param predicate The predicate to evaluate. 16192 * @return The first view that matches the predicate or null. 16193 */ 16194 public final View findViewByPredicate(Predicate<View> predicate) { 16195 return findViewByPredicateTraversal(predicate, null); 16196 } 16197 16198 /** 16199 * {@hide} 16200 * Look for a child view that matches the specified predicate, 16201 * starting with the specified view and its descendents and then 16202 * recusively searching the ancestors and siblings of that view 16203 * until this view is reached. 16204 * 16205 * This method is useful in cases where the predicate does not match 16206 * a single unique view (perhaps multiple views use the same id) 16207 * and we are trying to find the view that is "closest" in scope to the 16208 * starting view. 16209 * 16210 * @param start The view to start from. 16211 * @param predicate The predicate to evaluate. 16212 * @return The first view that matches the predicate or null. 16213 */ 16214 public final View findViewByPredicateInsideOut(View start, Predicate<View> predicate) { 16215 View childToSkip = null; 16216 for (;;) { 16217 View view = start.findViewByPredicateTraversal(predicate, childToSkip); 16218 if (view != null || start == this) { 16219 return view; 16220 } 16221 16222 ViewParent parent = start.getParent(); 16223 if (parent == null || !(parent instanceof View)) { 16224 return null; 16225 } 16226 16227 childToSkip = start; 16228 start = (View) parent; 16229 } 16230 } 16231 16232 /** 16233 * Sets the identifier for this view. The identifier does not have to be 16234 * unique in this view's hierarchy. The identifier should be a positive 16235 * number. 16236 * 16237 * @see #NO_ID 16238 * @see #getId() 16239 * @see #findViewById(int) 16240 * 16241 * @param id a number used to identify the view 16242 * 16243 * @attr ref android.R.styleable#View_id 16244 */ 16245 public void setId(int id) { 16246 mID = id; 16247 if (mID == View.NO_ID && mLabelForId != View.NO_ID) { 16248 mID = generateViewId(); 16249 } 16250 } 16251 16252 /** 16253 * {@hide} 16254 * 16255 * @param isRoot true if the view belongs to the root namespace, false 16256 * otherwise 16257 */ 16258 public void setIsRootNamespace(boolean isRoot) { 16259 if (isRoot) { 16260 mPrivateFlags |= PFLAG_IS_ROOT_NAMESPACE; 16261 } else { 16262 mPrivateFlags &= ~PFLAG_IS_ROOT_NAMESPACE; 16263 } 16264 } 16265 16266 /** 16267 * {@hide} 16268 * 16269 * @return true if the view belongs to the root namespace, false otherwise 16270 */ 16271 public boolean isRootNamespace() { 16272 return (mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0; 16273 } 16274 16275 /** 16276 * Returns this view's identifier. 16277 * 16278 * @return a positive integer used to identify the view or {@link #NO_ID} 16279 * if the view has no ID 16280 * 16281 * @see #setId(int) 16282 * @see #findViewById(int) 16283 * @attr ref android.R.styleable#View_id 16284 */ 16285 @ViewDebug.CapturedViewProperty 16286 public int getId() { 16287 return mID; 16288 } 16289 16290 /** 16291 * Returns this view's tag. 16292 * 16293 * @return the Object stored in this view as a tag 16294 * 16295 * @see #setTag(Object) 16296 * @see #getTag(int) 16297 */ 16298 @ViewDebug.ExportedProperty 16299 public Object getTag() { 16300 return mTag; 16301 } 16302 16303 /** 16304 * Sets the tag associated with this view. A tag can be used to mark 16305 * a view in its hierarchy and does not have to be unique within the 16306 * hierarchy. Tags can also be used to store data within a view without 16307 * resorting to another data structure. 16308 * 16309 * @param tag an Object to tag the view with 16310 * 16311 * @see #getTag() 16312 * @see #setTag(int, Object) 16313 */ 16314 public void setTag(final Object tag) { 16315 mTag = tag; 16316 } 16317 16318 /** 16319 * Returns the tag associated with this view and the specified key. 16320 * 16321 * @param key The key identifying the tag 16322 * 16323 * @return the Object stored in this view as a tag 16324 * 16325 * @see #setTag(int, Object) 16326 * @see #getTag() 16327 */ 16328 public Object getTag(int key) { 16329 if (mKeyedTags != null) return mKeyedTags.get(key); 16330 return null; 16331 } 16332 16333 /** 16334 * Sets a tag associated with this view and a key. A tag can be used 16335 * to mark a view in its hierarchy and does not have to be unique within 16336 * the hierarchy. Tags can also be used to store data within a view 16337 * without resorting to another data structure. 16338 * 16339 * The specified key should be an id declared in the resources of the 16340 * application to ensure it is unique (see the <a 16341 * href={@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). 16342 * Keys identified as belonging to 16343 * the Android framework or not associated with any package will cause 16344 * an {@link IllegalArgumentException} to be thrown. 16345 * 16346 * @param key The key identifying the tag 16347 * @param tag An Object to tag the view with 16348 * 16349 * @throws IllegalArgumentException If they specified key is not valid 16350 * 16351 * @see #setTag(Object) 16352 * @see #getTag(int) 16353 */ 16354 public void setTag(int key, final Object tag) { 16355 // If the package id is 0x00 or 0x01, it's either an undefined package 16356 // or a framework id 16357 if ((key >>> 24) < 2) { 16358 throw new IllegalArgumentException("The key must be an application-specific " 16359 + "resource id."); 16360 } 16361 16362 setKeyedTag(key, tag); 16363 } 16364 16365 /** 16366 * Variation of {@link #setTag(int, Object)} that enforces the key to be a 16367 * framework id. 16368 * 16369 * @hide 16370 */ 16371 public void setTagInternal(int key, Object tag) { 16372 if ((key >>> 24) != 0x1) { 16373 throw new IllegalArgumentException("The key must be a framework-specific " 16374 + "resource id."); 16375 } 16376 16377 setKeyedTag(key, tag); 16378 } 16379 16380 private void setKeyedTag(int key, Object tag) { 16381 if (mKeyedTags == null) { 16382 mKeyedTags = new SparseArray<Object>(2); 16383 } 16384 16385 mKeyedTags.put(key, tag); 16386 } 16387 16388 /** 16389 * Prints information about this view in the log output, with the tag 16390 * {@link #VIEW_LOG_TAG}. 16391 * 16392 * @hide 16393 */ 16394 public void debug() { 16395 debug(0); 16396 } 16397 16398 /** 16399 * Prints information about this view in the log output, with the tag 16400 * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an 16401 * indentation defined by the <code>depth</code>. 16402 * 16403 * @param depth the indentation level 16404 * 16405 * @hide 16406 */ 16407 protected void debug(int depth) { 16408 String output = debugIndent(depth - 1); 16409 16410 output += "+ " + this; 16411 int id = getId(); 16412 if (id != -1) { 16413 output += " (id=" + id + ")"; 16414 } 16415 Object tag = getTag(); 16416 if (tag != null) { 16417 output += " (tag=" + tag + ")"; 16418 } 16419 Log.d(VIEW_LOG_TAG, output); 16420 16421 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 16422 output = debugIndent(depth) + " FOCUSED"; 16423 Log.d(VIEW_LOG_TAG, output); 16424 } 16425 16426 output = debugIndent(depth); 16427 output += "frame={" + mLeft + ", " + mTop + ", " + mRight 16428 + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY 16429 + "} "; 16430 Log.d(VIEW_LOG_TAG, output); 16431 16432 if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 16433 || mPaddingBottom != 0) { 16434 output = debugIndent(depth); 16435 output += "padding={" + mPaddingLeft + ", " + mPaddingTop 16436 + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; 16437 Log.d(VIEW_LOG_TAG, output); 16438 } 16439 16440 output = debugIndent(depth); 16441 output += "mMeasureWidth=" + mMeasuredWidth + 16442 " mMeasureHeight=" + mMeasuredHeight; 16443 Log.d(VIEW_LOG_TAG, output); 16444 16445 output = debugIndent(depth); 16446 if (mLayoutParams == null) { 16447 output += "BAD! no layout params"; 16448 } else { 16449 output = mLayoutParams.debug(output); 16450 } 16451 Log.d(VIEW_LOG_TAG, output); 16452 16453 output = debugIndent(depth); 16454 output += "flags={"; 16455 output += View.printFlags(mViewFlags); 16456 output += "}"; 16457 Log.d(VIEW_LOG_TAG, output); 16458 16459 output = debugIndent(depth); 16460 output += "privateFlags={"; 16461 output += View.printPrivateFlags(mPrivateFlags); 16462 output += "}"; 16463 Log.d(VIEW_LOG_TAG, output); 16464 } 16465 16466 /** 16467 * Creates a string of whitespaces used for indentation. 16468 * 16469 * @param depth the indentation level 16470 * @return a String containing (depth * 2 + 3) * 2 white spaces 16471 * 16472 * @hide 16473 */ 16474 protected static String debugIndent(int depth) { 16475 StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); 16476 for (int i = 0; i < (depth * 2) + 3; i++) { 16477 spaces.append(' ').append(' '); 16478 } 16479 return spaces.toString(); 16480 } 16481 16482 /** 16483 * <p>Return the offset of the widget's text baseline from the widget's top 16484 * boundary. If this widget does not support baseline alignment, this 16485 * method returns -1. </p> 16486 * 16487 * @return the offset of the baseline within the widget's bounds or -1 16488 * if baseline alignment is not supported 16489 */ 16490 @ViewDebug.ExportedProperty(category = "layout") 16491 public int getBaseline() { 16492 return -1; 16493 } 16494 16495 /** 16496 * Returns whether the view hierarchy is currently undergoing a layout pass. This 16497 * information is useful to avoid situations such as calling {@link #requestLayout()} during 16498 * a layout pass. 16499 * 16500 * @return whether the view hierarchy is currently undergoing a layout pass 16501 */ 16502 public boolean isInLayout() { 16503 ViewRootImpl viewRoot = getViewRootImpl(); 16504 return (viewRoot != null && viewRoot.isInLayout()); 16505 } 16506 16507 /** 16508 * Call this when something has changed which has invalidated the 16509 * layout of this view. This will schedule a layout pass of the view 16510 * tree. This should not be called while the view hierarchy is currently in a layout 16511 * pass ({@link #isInLayout()}. If layout is happening, the request may be honored at the 16512 * end of the current layout pass (and then layout will run again) or after the current 16513 * frame is drawn and the next layout occurs. 16514 * 16515 * <p>Subclasses which override this method should call the superclass method to 16516 * handle possible request-during-layout errors correctly.</p> 16517 */ 16518 public void requestLayout() { 16519 if (mMeasureCache != null) mMeasureCache.clear(); 16520 16521 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == null) { 16522 // Only trigger request-during-layout logic if this is the view requesting it, 16523 // not the views in its parent hierarchy 16524 ViewRootImpl viewRoot = getViewRootImpl(); 16525 if (viewRoot != null && viewRoot.isInLayout()) { 16526 if (!viewRoot.requestLayoutDuringLayout(this)) { 16527 return; 16528 } 16529 } 16530 mAttachInfo.mViewRequestingLayout = this; 16531 } 16532 16533 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 16534 mPrivateFlags |= PFLAG_INVALIDATED; 16535 16536 if (mParent != null && !mParent.isLayoutRequested()) { 16537 mParent.requestLayout(); 16538 } 16539 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == this) { 16540 mAttachInfo.mViewRequestingLayout = null; 16541 } 16542 } 16543 16544 /** 16545 * Forces this view to be laid out during the next layout pass. 16546 * This method does not call requestLayout() or forceLayout() 16547 * on the parent. 16548 */ 16549 public void forceLayout() { 16550 if (mMeasureCache != null) mMeasureCache.clear(); 16551 16552 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 16553 mPrivateFlags |= PFLAG_INVALIDATED; 16554 } 16555 16556 /** 16557 * <p> 16558 * This is called to find out how big a view should be. The parent 16559 * supplies constraint information in the width and height parameters. 16560 * </p> 16561 * 16562 * <p> 16563 * The actual measurement work of a view is performed in 16564 * {@link #onMeasure(int, int)}, called by this method. Therefore, only 16565 * {@link #onMeasure(int, int)} can and must be overridden by subclasses. 16566 * </p> 16567 * 16568 * 16569 * @param widthMeasureSpec Horizontal space requirements as imposed by the 16570 * parent 16571 * @param heightMeasureSpec Vertical space requirements as imposed by the 16572 * parent 16573 * 16574 * @see #onMeasure(int, int) 16575 */ 16576 public final void measure(int widthMeasureSpec, int heightMeasureSpec) { 16577 boolean optical = isLayoutModeOptical(this); 16578 if (optical != isLayoutModeOptical(mParent)) { 16579 Insets insets = getOpticalInsets(); 16580 int oWidth = insets.left + insets.right; 16581 int oHeight = insets.top + insets.bottom; 16582 widthMeasureSpec = MeasureSpec.adjust(widthMeasureSpec, optical ? -oWidth : oWidth); 16583 heightMeasureSpec = MeasureSpec.adjust(heightMeasureSpec, optical ? -oHeight : oHeight); 16584 } 16585 16586 // Suppress sign extension for the low bytes 16587 long key = (long) widthMeasureSpec << 32 | (long) heightMeasureSpec & 0xffffffffL; 16588 if (mMeasureCache == null) mMeasureCache = new LongSparseLongArray(2); 16589 16590 if ((mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT || 16591 widthMeasureSpec != mOldWidthMeasureSpec || 16592 heightMeasureSpec != mOldHeightMeasureSpec) { 16593 16594 // first clears the measured dimension flag 16595 mPrivateFlags &= ~PFLAG_MEASURED_DIMENSION_SET; 16596 16597 resolveRtlPropertiesIfNeeded(); 16598 16599 int cacheIndex = (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT ? -1 : 16600 mMeasureCache.indexOfKey(key); 16601 if (cacheIndex < 0 || sIgnoreMeasureCache) { 16602 // measure ourselves, this should set the measured dimension flag back 16603 onMeasure(widthMeasureSpec, heightMeasureSpec); 16604 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 16605 } else { 16606 long value = mMeasureCache.valueAt(cacheIndex); 16607 // Casting a long to int drops the high 32 bits, no mask needed 16608 setMeasuredDimension((int) (value >> 32), (int) value); 16609 mPrivateFlags3 |= PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 16610 } 16611 16612 // flag not set, setMeasuredDimension() was not invoked, we raise 16613 // an exception to warn the developer 16614 if ((mPrivateFlags & PFLAG_MEASURED_DIMENSION_SET) != PFLAG_MEASURED_DIMENSION_SET) { 16615 throw new IllegalStateException("onMeasure() did not set the" 16616 + " measured dimension by calling" 16617 + " setMeasuredDimension()"); 16618 } 16619 16620 mPrivateFlags |= PFLAG_LAYOUT_REQUIRED; 16621 } 16622 16623 mOldWidthMeasureSpec = widthMeasureSpec; 16624 mOldHeightMeasureSpec = heightMeasureSpec; 16625 16626 mMeasureCache.put(key, ((long) mMeasuredWidth) << 32 | 16627 (long) mMeasuredHeight & 0xffffffffL); // suppress sign extension 16628 } 16629 16630 /** 16631 * <p> 16632 * Measure the view and its content to determine the measured width and the 16633 * measured height. This method is invoked by {@link #measure(int, int)} and 16634 * should be overriden by subclasses to provide accurate and efficient 16635 * measurement of their contents. 16636 * </p> 16637 * 16638 * <p> 16639 * <strong>CONTRACT:</strong> When overriding this method, you 16640 * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the 16641 * measured width and height of this view. Failure to do so will trigger an 16642 * <code>IllegalStateException</code>, thrown by 16643 * {@link #measure(int, int)}. Calling the superclass' 16644 * {@link #onMeasure(int, int)} is a valid use. 16645 * </p> 16646 * 16647 * <p> 16648 * The base class implementation of measure defaults to the background size, 16649 * unless a larger size is allowed by the MeasureSpec. Subclasses should 16650 * override {@link #onMeasure(int, int)} to provide better measurements of 16651 * their content. 16652 * </p> 16653 * 16654 * <p> 16655 * If this method is overridden, it is the subclass's responsibility to make 16656 * sure the measured height and width are at least the view's minimum height 16657 * and width ({@link #getSuggestedMinimumHeight()} and 16658 * {@link #getSuggestedMinimumWidth()}). 16659 * </p> 16660 * 16661 * @param widthMeasureSpec horizontal space requirements as imposed by the parent. 16662 * The requirements are encoded with 16663 * {@link android.view.View.MeasureSpec}. 16664 * @param heightMeasureSpec vertical space requirements as imposed by the parent. 16665 * The requirements are encoded with 16666 * {@link android.view.View.MeasureSpec}. 16667 * 16668 * @see #getMeasuredWidth() 16669 * @see #getMeasuredHeight() 16670 * @see #setMeasuredDimension(int, int) 16671 * @see #getSuggestedMinimumHeight() 16672 * @see #getSuggestedMinimumWidth() 16673 * @see android.view.View.MeasureSpec#getMode(int) 16674 * @see android.view.View.MeasureSpec#getSize(int) 16675 */ 16676 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 16677 setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), 16678 getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); 16679 } 16680 16681 /** 16682 * <p>This method must be called by {@link #onMeasure(int, int)} to store the 16683 * measured width and measured height. Failing to do so will trigger an 16684 * exception at measurement time.</p> 16685 * 16686 * @param measuredWidth The measured width of this view. May be a complex 16687 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 16688 * {@link #MEASURED_STATE_TOO_SMALL}. 16689 * @param measuredHeight The measured height of this view. May be a complex 16690 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 16691 * {@link #MEASURED_STATE_TOO_SMALL}. 16692 */ 16693 protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { 16694 boolean optical = isLayoutModeOptical(this); 16695 if (optical != isLayoutModeOptical(mParent)) { 16696 Insets insets = getOpticalInsets(); 16697 int opticalWidth = insets.left + insets.right; 16698 int opticalHeight = insets.top + insets.bottom; 16699 16700 measuredWidth += optical ? opticalWidth : -opticalWidth; 16701 measuredHeight += optical ? opticalHeight : -opticalHeight; 16702 } 16703 mMeasuredWidth = measuredWidth; 16704 mMeasuredHeight = measuredHeight; 16705 16706 mPrivateFlags |= PFLAG_MEASURED_DIMENSION_SET; 16707 } 16708 16709 /** 16710 * Merge two states as returned by {@link #getMeasuredState()}. 16711 * @param curState The current state as returned from a view or the result 16712 * of combining multiple views. 16713 * @param newState The new view state to combine. 16714 * @return Returns a new integer reflecting the combination of the two 16715 * states. 16716 */ 16717 public static int combineMeasuredStates(int curState, int newState) { 16718 return curState | newState; 16719 } 16720 16721 /** 16722 * Version of {@link #resolveSizeAndState(int, int, int)} 16723 * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. 16724 */ 16725 public static int resolveSize(int size, int measureSpec) { 16726 return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; 16727 } 16728 16729 /** 16730 * Utility to reconcile a desired size and state, with constraints imposed 16731 * by a MeasureSpec. Will take the desired size, unless a different size 16732 * is imposed by the constraints. The returned value is a compound integer, 16733 * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and 16734 * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the resulting 16735 * size is smaller than the size the view wants to be. 16736 * 16737 * @param size How big the view wants to be 16738 * @param measureSpec Constraints imposed by the parent 16739 * @return Size information bit mask as defined by 16740 * {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 16741 */ 16742 public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { 16743 int result = size; 16744 int specMode = MeasureSpec.getMode(measureSpec); 16745 int specSize = MeasureSpec.getSize(measureSpec); 16746 switch (specMode) { 16747 case MeasureSpec.UNSPECIFIED: 16748 result = size; 16749 break; 16750 case MeasureSpec.AT_MOST: 16751 if (specSize < size) { 16752 result = specSize | MEASURED_STATE_TOO_SMALL; 16753 } else { 16754 result = size; 16755 } 16756 break; 16757 case MeasureSpec.EXACTLY: 16758 result = specSize; 16759 break; 16760 } 16761 return result | (childMeasuredState&MEASURED_STATE_MASK); 16762 } 16763 16764 /** 16765 * Utility to return a default size. Uses the supplied size if the 16766 * MeasureSpec imposed no constraints. Will get larger if allowed 16767 * by the MeasureSpec. 16768 * 16769 * @param size Default size for this view 16770 * @param measureSpec Constraints imposed by the parent 16771 * @return The size this view should be. 16772 */ 16773 public static int getDefaultSize(int size, int measureSpec) { 16774 int result = size; 16775 int specMode = MeasureSpec.getMode(measureSpec); 16776 int specSize = MeasureSpec.getSize(measureSpec); 16777 16778 switch (specMode) { 16779 case MeasureSpec.UNSPECIFIED: 16780 result = size; 16781 break; 16782 case MeasureSpec.AT_MOST: 16783 case MeasureSpec.EXACTLY: 16784 result = specSize; 16785 break; 16786 } 16787 return result; 16788 } 16789 16790 /** 16791 * Returns the suggested minimum height that the view should use. This 16792 * returns the maximum of the view's minimum height 16793 * and the background's minimum height 16794 * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). 16795 * <p> 16796 * When being used in {@link #onMeasure(int, int)}, the caller should still 16797 * ensure the returned height is within the requirements of the parent. 16798 * 16799 * @return The suggested minimum height of the view. 16800 */ 16801 protected int getSuggestedMinimumHeight() { 16802 return (mBackground == null) ? mMinHeight : max(mMinHeight, mBackground.getMinimumHeight()); 16803 16804 } 16805 16806 /** 16807 * Returns the suggested minimum width that the view should use. This 16808 * returns the maximum of the view's minimum width) 16809 * and the background's minimum width 16810 * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). 16811 * <p> 16812 * When being used in {@link #onMeasure(int, int)}, the caller should still 16813 * ensure the returned width is within the requirements of the parent. 16814 * 16815 * @return The suggested minimum width of the view. 16816 */ 16817 protected int getSuggestedMinimumWidth() { 16818 return (mBackground == null) ? mMinWidth : max(mMinWidth, mBackground.getMinimumWidth()); 16819 } 16820 16821 /** 16822 * Returns the minimum height of the view. 16823 * 16824 * @return the minimum height the view will try to be. 16825 * 16826 * @see #setMinimumHeight(int) 16827 * 16828 * @attr ref android.R.styleable#View_minHeight 16829 */ 16830 public int getMinimumHeight() { 16831 return mMinHeight; 16832 } 16833 16834 /** 16835 * Sets the minimum height of the view. It is not guaranteed the view will 16836 * be able to achieve this minimum height (for example, if its parent layout 16837 * constrains it with less available height). 16838 * 16839 * @param minHeight The minimum height the view will try to be. 16840 * 16841 * @see #getMinimumHeight() 16842 * 16843 * @attr ref android.R.styleable#View_minHeight 16844 */ 16845 public void setMinimumHeight(int minHeight) { 16846 mMinHeight = minHeight; 16847 requestLayout(); 16848 } 16849 16850 /** 16851 * Returns the minimum width of the view. 16852 * 16853 * @return the minimum width the view will try to be. 16854 * 16855 * @see #setMinimumWidth(int) 16856 * 16857 * @attr ref android.R.styleable#View_minWidth 16858 */ 16859 public int getMinimumWidth() { 16860 return mMinWidth; 16861 } 16862 16863 /** 16864 * Sets the minimum width of the view. It is not guaranteed the view will 16865 * be able to achieve this minimum width (for example, if its parent layout 16866 * constrains it with less available width). 16867 * 16868 * @param minWidth The minimum width the view will try to be. 16869 * 16870 * @see #getMinimumWidth() 16871 * 16872 * @attr ref android.R.styleable#View_minWidth 16873 */ 16874 public void setMinimumWidth(int minWidth) { 16875 mMinWidth = minWidth; 16876 requestLayout(); 16877 16878 } 16879 16880 /** 16881 * Get the animation currently associated with this view. 16882 * 16883 * @return The animation that is currently playing or 16884 * scheduled to play for this view. 16885 */ 16886 public Animation getAnimation() { 16887 return mCurrentAnimation; 16888 } 16889 16890 /** 16891 * Start the specified animation now. 16892 * 16893 * @param animation the animation to start now 16894 */ 16895 public void startAnimation(Animation animation) { 16896 animation.setStartTime(Animation.START_ON_FIRST_FRAME); 16897 setAnimation(animation); 16898 invalidateParentCaches(); 16899 invalidate(true); 16900 } 16901 16902 /** 16903 * Cancels any animations for this view. 16904 */ 16905 public void clearAnimation() { 16906 if (mCurrentAnimation != null) { 16907 mCurrentAnimation.detach(); 16908 } 16909 mCurrentAnimation = null; 16910 invalidateParentIfNeeded(); 16911 } 16912 16913 /** 16914 * Sets the next animation to play for this view. 16915 * If you want the animation to play immediately, use 16916 * {@link #startAnimation(android.view.animation.Animation)} instead. 16917 * This method provides allows fine-grained 16918 * control over the start time and invalidation, but you 16919 * must make sure that 1) the animation has a start time set, and 16920 * 2) the view's parent (which controls animations on its children) 16921 * will be invalidated when the animation is supposed to 16922 * start. 16923 * 16924 * @param animation The next animation, or null. 16925 */ 16926 public void setAnimation(Animation animation) { 16927 mCurrentAnimation = animation; 16928 16929 if (animation != null) { 16930 // If the screen is off assume the animation start time is now instead of 16931 // the next frame we draw. Keeping the START_ON_FIRST_FRAME start time 16932 // would cause the animation to start when the screen turns back on 16933 if (mAttachInfo != null && !mAttachInfo.mScreenOn && 16934 animation.getStartTime() == Animation.START_ON_FIRST_FRAME) { 16935 animation.setStartTime(AnimationUtils.currentAnimationTimeMillis()); 16936 } 16937 animation.reset(); 16938 } 16939 } 16940 16941 /** 16942 * Invoked by a parent ViewGroup to notify the start of the animation 16943 * currently associated with this view. If you override this method, 16944 * always call super.onAnimationStart(); 16945 * 16946 * @see #setAnimation(android.view.animation.Animation) 16947 * @see #getAnimation() 16948 */ 16949 protected void onAnimationStart() { 16950 mPrivateFlags |= PFLAG_ANIMATION_STARTED; 16951 } 16952 16953 /** 16954 * Invoked by a parent ViewGroup to notify the end of the animation 16955 * currently associated with this view. If you override this method, 16956 * always call super.onAnimationEnd(); 16957 * 16958 * @see #setAnimation(android.view.animation.Animation) 16959 * @see #getAnimation() 16960 */ 16961 protected void onAnimationEnd() { 16962 mPrivateFlags &= ~PFLAG_ANIMATION_STARTED; 16963 } 16964 16965 /** 16966 * Invoked if there is a Transform that involves alpha. Subclass that can 16967 * draw themselves with the specified alpha should return true, and then 16968 * respect that alpha when their onDraw() is called. If this returns false 16969 * then the view may be redirected to draw into an offscreen buffer to 16970 * fulfill the request, which will look fine, but may be slower than if the 16971 * subclass handles it internally. The default implementation returns false. 16972 * 16973 * @param alpha The alpha (0..255) to apply to the view's drawing 16974 * @return true if the view can draw with the specified alpha. 16975 */ 16976 protected boolean onSetAlpha(int alpha) { 16977 return false; 16978 } 16979 16980 /** 16981 * This is used by the RootView to perform an optimization when 16982 * the view hierarchy contains one or several SurfaceView. 16983 * SurfaceView is always considered transparent, but its children are not, 16984 * therefore all View objects remove themselves from the global transparent 16985 * region (passed as a parameter to this function). 16986 * 16987 * @param region The transparent region for this ViewAncestor (window). 16988 * 16989 * @return Returns true if the effective visibility of the view at this 16990 * point is opaque, regardless of the transparent region; returns false 16991 * if it is possible for underlying windows to be seen behind the view. 16992 * 16993 * {@hide} 16994 */ 16995 public boolean gatherTransparentRegion(Region region) { 16996 final AttachInfo attachInfo = mAttachInfo; 16997 if (region != null && attachInfo != null) { 16998 final int pflags = mPrivateFlags; 16999 if ((pflags & PFLAG_SKIP_DRAW) == 0) { 17000 // The SKIP_DRAW flag IS NOT set, so this view draws. We need to 17001 // remove it from the transparent region. 17002 final int[] location = attachInfo.mTransparentLocation; 17003 getLocationInWindow(location); 17004 region.op(location[0], location[1], location[0] + mRight - mLeft, 17005 location[1] + mBottom - mTop, Region.Op.DIFFERENCE); 17006 } else if ((pflags & PFLAG_ONLY_DRAWS_BACKGROUND) != 0 && mBackground != null) { 17007 // The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable 17008 // exists, so we remove the background drawable's non-transparent 17009 // parts from this transparent region. 17010 applyDrawableToTransparentRegion(mBackground, region); 17011 } 17012 } 17013 return true; 17014 } 17015 17016 /** 17017 * Play a sound effect for this view. 17018 * 17019 * <p>The framework will play sound effects for some built in actions, such as 17020 * clicking, but you may wish to play these effects in your widget, 17021 * for instance, for internal navigation. 17022 * 17023 * <p>The sound effect will only be played if sound effects are enabled by the user, and 17024 * {@link #isSoundEffectsEnabled()} is true. 17025 * 17026 * @param soundConstant One of the constants defined in {@link SoundEffectConstants} 17027 */ 17028 public void playSoundEffect(int soundConstant) { 17029 if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { 17030 return; 17031 } 17032 mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); 17033 } 17034 17035 /** 17036 * BZZZTT!!1! 17037 * 17038 * <p>Provide haptic feedback to the user for this view. 17039 * 17040 * <p>The framework will provide haptic feedback for some built in actions, 17041 * such as long presses, but you may wish to provide feedback for your 17042 * own widget. 17043 * 17044 * <p>The feedback will only be performed if 17045 * {@link #isHapticFeedbackEnabled()} is true. 17046 * 17047 * @param feedbackConstant One of the constants defined in 17048 * {@link HapticFeedbackConstants} 17049 */ 17050 public boolean performHapticFeedback(int feedbackConstant) { 17051 return performHapticFeedback(feedbackConstant, 0); 17052 } 17053 17054 /** 17055 * BZZZTT!!1! 17056 * 17057 * <p>Like {@link #performHapticFeedback(int)}, with additional options. 17058 * 17059 * @param feedbackConstant One of the constants defined in 17060 * {@link HapticFeedbackConstants} 17061 * @param flags Additional flags as per {@link HapticFeedbackConstants}. 17062 */ 17063 public boolean performHapticFeedback(int feedbackConstant, int flags) { 17064 if (mAttachInfo == null) { 17065 return false; 17066 } 17067 //noinspection SimplifiableIfStatement 17068 if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 17069 && !isHapticFeedbackEnabled()) { 17070 return false; 17071 } 17072 return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, 17073 (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); 17074 } 17075 17076 /** 17077 * Request that the visibility of the status bar or other screen/window 17078 * decorations be changed. 17079 * 17080 * <p>This method is used to put the over device UI into temporary modes 17081 * where the user's attention is focused more on the application content, 17082 * by dimming or hiding surrounding system affordances. This is typically 17083 * used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY 17084 * Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content 17085 * to be placed behind the action bar (and with these flags other system 17086 * affordances) so that smooth transitions between hiding and showing them 17087 * can be done. 17088 * 17089 * <p>Two representative examples of the use of system UI visibility is 17090 * implementing a content browsing application (like a magazine reader) 17091 * and a video playing application. 17092 * 17093 * <p>The first code shows a typical implementation of a View in a content 17094 * browsing application. In this implementation, the application goes 17095 * into a content-oriented mode by hiding the status bar and action bar, 17096 * and putting the navigation elements into lights out mode. The user can 17097 * then interact with content while in this mode. Such an application should 17098 * provide an easy way for the user to toggle out of the mode (such as to 17099 * check information in the status bar or access notifications). In the 17100 * implementation here, this is done simply by tapping on the content. 17101 * 17102 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java 17103 * content} 17104 * 17105 * <p>This second code sample shows a typical implementation of a View 17106 * in a video playing application. In this situation, while the video is 17107 * playing the application would like to go into a complete full-screen mode, 17108 * to use as much of the display as possible for the video. When in this state 17109 * the user can not interact with the application; the system intercepts 17110 * touching on the screen to pop the UI out of full screen mode. See 17111 * {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code. 17112 * 17113 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java 17114 * content} 17115 * 17116 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 17117 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 17118 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 17119 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 17120 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 17121 */ 17122 public void setSystemUiVisibility(int visibility) { 17123 if (visibility != mSystemUiVisibility) { 17124 mSystemUiVisibility = visibility; 17125 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 17126 mParent.recomputeViewAttributes(this); 17127 } 17128 } 17129 } 17130 17131 /** 17132 * Returns the last {@link #setSystemUiVisibility(int)} that this view has requested. 17133 * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 17134 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 17135 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 17136 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 17137 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 17138 */ 17139 public int getSystemUiVisibility() { 17140 return mSystemUiVisibility; 17141 } 17142 17143 /** 17144 * Returns the current system UI visibility that is currently set for 17145 * the entire window. This is the combination of the 17146 * {@link #setSystemUiVisibility(int)} values supplied by all of the 17147 * views in the window. 17148 */ 17149 public int getWindowSystemUiVisibility() { 17150 return mAttachInfo != null ? mAttachInfo.mSystemUiVisibility : 0; 17151 } 17152 17153 /** 17154 * Override to find out when the window's requested system UI visibility 17155 * has changed, that is the value returned by {@link #getWindowSystemUiVisibility()}. 17156 * This is different from the callbacks received through 17157 * {@link #setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener)} 17158 * in that this is only telling you about the local request of the window, 17159 * not the actual values applied by the system. 17160 */ 17161 public void onWindowSystemUiVisibilityChanged(int visible) { 17162 } 17163 17164 /** 17165 * Dispatch callbacks to {@link #onWindowSystemUiVisibilityChanged(int)} down 17166 * the view hierarchy. 17167 */ 17168 public void dispatchWindowSystemUiVisiblityChanged(int visible) { 17169 onWindowSystemUiVisibilityChanged(visible); 17170 } 17171 17172 /** 17173 * Set a listener to receive callbacks when the visibility of the system bar changes. 17174 * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. 17175 */ 17176 public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { 17177 getListenerInfo().mOnSystemUiVisibilityChangeListener = l; 17178 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 17179 mParent.recomputeViewAttributes(this); 17180 } 17181 } 17182 17183 /** 17184 * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down 17185 * the view hierarchy. 17186 */ 17187 public void dispatchSystemUiVisibilityChanged(int visibility) { 17188 ListenerInfo li = mListenerInfo; 17189 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 17190 li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( 17191 visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); 17192 } 17193 } 17194 17195 boolean updateLocalSystemUiVisibility(int localValue, int localChanges) { 17196 int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); 17197 if (val != mSystemUiVisibility) { 17198 setSystemUiVisibility(val); 17199 return true; 17200 } 17201 return false; 17202 } 17203 17204 /** @hide */ 17205 public void setDisabledSystemUiVisibility(int flags) { 17206 if (mAttachInfo != null) { 17207 if (mAttachInfo.mDisabledSystemUiVisibility != flags) { 17208 mAttachInfo.mDisabledSystemUiVisibility = flags; 17209 if (mParent != null) { 17210 mParent.recomputeViewAttributes(this); 17211 } 17212 } 17213 } 17214 } 17215 17216 /** 17217 * Creates an image that the system displays during the drag and drop 17218 * operation. This is called a "drag shadow". The default implementation 17219 * for a DragShadowBuilder based on a View returns an image that has exactly the same 17220 * appearance as the given View. The default also positions the center of the drag shadow 17221 * directly under the touch point. If no View is provided (the constructor with no parameters 17222 * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and 17223 * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overriden, then the 17224 * default is an invisible drag shadow. 17225 * <p> 17226 * You are not required to use the View you provide to the constructor as the basis of the 17227 * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw 17228 * anything you want as the drag shadow. 17229 * </p> 17230 * <p> 17231 * You pass a DragShadowBuilder object to the system when you start the drag. The system 17232 * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the 17233 * size and position of the drag shadow. It uses this data to construct a 17234 * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} 17235 * so that your application can draw the shadow image in the Canvas. 17236 * </p> 17237 * 17238 * <div class="special reference"> 17239 * <h3>Developer Guides</h3> 17240 * <p>For a guide to implementing drag and drop features, read the 17241 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 17242 * </div> 17243 */ 17244 public static class DragShadowBuilder { 17245 private final WeakReference<View> mView; 17246 17247 /** 17248 * Constructs a shadow image builder based on a View. By default, the resulting drag 17249 * shadow will have the same appearance and dimensions as the View, with the touch point 17250 * over the center of the View. 17251 * @param view A View. Any View in scope can be used. 17252 */ 17253 public DragShadowBuilder(View view) { 17254 mView = new WeakReference<View>(view); 17255 } 17256 17257 /** 17258 * Construct a shadow builder object with no associated View. This 17259 * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} 17260 * and {@link #onDrawShadow(Canvas)} methods are also overridden in order 17261 * to supply the drag shadow's dimensions and appearance without 17262 * reference to any View object. If they are not overridden, then the result is an 17263 * invisible drag shadow. 17264 */ 17265 public DragShadowBuilder() { 17266 mView = new WeakReference<View>(null); 17267 } 17268 17269 /** 17270 * Returns the View object that had been passed to the 17271 * {@link #View.DragShadowBuilder(View)} 17272 * constructor. If that View parameter was {@code null} or if the 17273 * {@link #View.DragShadowBuilder()} 17274 * constructor was used to instantiate the builder object, this method will return 17275 * null. 17276 * 17277 * @return The View object associate with this builder object. 17278 */ 17279 @SuppressWarnings({"JavadocReference"}) 17280 final public View getView() { 17281 return mView.get(); 17282 } 17283 17284 /** 17285 * Provides the metrics for the shadow image. These include the dimensions of 17286 * the shadow image, and the point within that shadow that should 17287 * be centered under the touch location while dragging. 17288 * <p> 17289 * The default implementation sets the dimensions of the shadow to be the 17290 * same as the dimensions of the View itself and centers the shadow under 17291 * the touch point. 17292 * </p> 17293 * 17294 * @param shadowSize A {@link android.graphics.Point} containing the width and height 17295 * of the shadow image. Your application must set {@link android.graphics.Point#x} to the 17296 * desired width and must set {@link android.graphics.Point#y} to the desired height of the 17297 * image. 17298 * 17299 * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the 17300 * shadow image that should be underneath the touch point during the drag and drop 17301 * operation. Your application must set {@link android.graphics.Point#x} to the 17302 * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. 17303 */ 17304 public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 17305 final View view = mView.get(); 17306 if (view != null) { 17307 shadowSize.set(view.getWidth(), view.getHeight()); 17308 shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); 17309 } else { 17310 Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); 17311 } 17312 } 17313 17314 /** 17315 * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object 17316 * based on the dimensions it received from the 17317 * {@link #onProvideShadowMetrics(Point, Point)} callback. 17318 * 17319 * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. 17320 */ 17321 public void onDrawShadow(Canvas canvas) { 17322 final View view = mView.get(); 17323 if (view != null) { 17324 view.draw(canvas); 17325 } else { 17326 Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); 17327 } 17328 } 17329 } 17330 17331 /** 17332 * Starts a drag and drop operation. When your application calls this method, it passes a 17333 * {@link android.view.View.DragShadowBuilder} object to the system. The 17334 * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} 17335 * to get metrics for the drag shadow, and then calls the object's 17336 * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. 17337 * <p> 17338 * Once the system has the drag shadow, it begins the drag and drop operation by sending 17339 * drag events to all the View objects in your application that are currently visible. It does 17340 * this either by calling the View object's drag listener (an implementation of 17341 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the 17342 * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. 17343 * Both are passed a {@link android.view.DragEvent} object that has a 17344 * {@link android.view.DragEvent#getAction()} value of 17345 * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. 17346 * </p> 17347 * <p> 17348 * Your application can invoke startDrag() on any attached View object. The View object does not 17349 * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to 17350 * be related to the View the user selected for dragging. 17351 * </p> 17352 * @param data A {@link android.content.ClipData} object pointing to the data to be 17353 * transferred by the drag and drop operation. 17354 * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the 17355 * drag shadow. 17356 * @param myLocalState An {@link java.lang.Object} containing local data about the drag and 17357 * drop operation. This Object is put into every DragEvent object sent by the system during the 17358 * current drag. 17359 * <p> 17360 * myLocalState is a lightweight mechanism for the sending information from the dragged View 17361 * to the target Views. For example, it can contain flags that differentiate between a 17362 * a copy operation and a move operation. 17363 * </p> 17364 * @param flags Flags that control the drag and drop operation. No flags are currently defined, 17365 * so the parameter should be set to 0. 17366 * @return {@code true} if the method completes successfully, or 17367 * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to 17368 * do a drag, and so no drag operation is in progress. 17369 */ 17370 public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, 17371 Object myLocalState, int flags) { 17372 if (ViewDebug.DEBUG_DRAG) { 17373 Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); 17374 } 17375 boolean okay = false; 17376 17377 Point shadowSize = new Point(); 17378 Point shadowTouchPoint = new Point(); 17379 shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); 17380 17381 if ((shadowSize.x < 0) || (shadowSize.y < 0) || 17382 (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { 17383 throw new IllegalStateException("Drag shadow dimensions must not be negative"); 17384 } 17385 17386 if (ViewDebug.DEBUG_DRAG) { 17387 Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y 17388 + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); 17389 } 17390 Surface surface = new Surface(); 17391 try { 17392 IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, 17393 flags, shadowSize.x, shadowSize.y, surface); 17394 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token 17395 + " surface=" + surface); 17396 if (token != null) { 17397 Canvas canvas = surface.lockCanvas(null); 17398 try { 17399 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 17400 shadowBuilder.onDrawShadow(canvas); 17401 } finally { 17402 surface.unlockCanvasAndPost(canvas); 17403 } 17404 17405 final ViewRootImpl root = getViewRootImpl(); 17406 17407 // Cache the local state object for delivery with DragEvents 17408 root.setLocalDragState(myLocalState); 17409 17410 // repurpose 'shadowSize' for the last touch point 17411 root.getLastTouchPoint(shadowSize); 17412 17413 okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, 17414 shadowSize.x, shadowSize.y, 17415 shadowTouchPoint.x, shadowTouchPoint.y, data); 17416 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); 17417 17418 // Off and running! Release our local surface instance; the drag 17419 // shadow surface is now managed by the system process. 17420 surface.release(); 17421 } 17422 } catch (Exception e) { 17423 Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); 17424 surface.destroy(); 17425 } 17426 17427 return okay; 17428 } 17429 17430 /** 17431 * Handles drag events sent by the system following a call to 17432 * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. 17433 *<p> 17434 * When the system calls this method, it passes a 17435 * {@link android.view.DragEvent} object. A call to 17436 * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined 17437 * in DragEvent. The method uses these to determine what is happening in the drag and drop 17438 * operation. 17439 * @param event The {@link android.view.DragEvent} sent by the system. 17440 * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined 17441 * in DragEvent, indicating the type of drag event represented by this object. 17442 * @return {@code true} if the method was successful, otherwise {@code false}. 17443 * <p> 17444 * The method should return {@code true} in response to an action type of 17445 * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current 17446 * operation. 17447 * </p> 17448 * <p> 17449 * The method should also return {@code true} in response to an action type of 17450 * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or 17451 * {@code false} if it didn't. 17452 * </p> 17453 */ 17454 public boolean onDragEvent(DragEvent event) { 17455 return false; 17456 } 17457 17458 /** 17459 * Detects if this View is enabled and has a drag event listener. 17460 * If both are true, then it calls the drag event listener with the 17461 * {@link android.view.DragEvent} it received. If the drag event listener returns 17462 * {@code true}, then dispatchDragEvent() returns {@code true}. 17463 * <p> 17464 * For all other cases, the method calls the 17465 * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler 17466 * method and returns its result. 17467 * </p> 17468 * <p> 17469 * This ensures that a drag event is always consumed, even if the View does not have a drag 17470 * event listener. However, if the View has a listener and the listener returns true, then 17471 * onDragEvent() is not called. 17472 * </p> 17473 */ 17474 public boolean dispatchDragEvent(DragEvent event) { 17475 ListenerInfo li = mListenerInfo; 17476 //noinspection SimplifiableIfStatement 17477 if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 17478 && li.mOnDragListener.onDrag(this, event)) { 17479 return true; 17480 } 17481 return onDragEvent(event); 17482 } 17483 17484 boolean canAcceptDrag() { 17485 return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0; 17486 } 17487 17488 /** 17489 * This needs to be a better API (NOT ON VIEW) before it is exposed. If 17490 * it is ever exposed at all. 17491 * @hide 17492 */ 17493 public void onCloseSystemDialogs(String reason) { 17494 } 17495 17496 /** 17497 * Given a Drawable whose bounds have been set to draw into this view, 17498 * update a Region being computed for 17499 * {@link #gatherTransparentRegion(android.graphics.Region)} so 17500 * that any non-transparent parts of the Drawable are removed from the 17501 * given transparent region. 17502 * 17503 * @param dr The Drawable whose transparency is to be applied to the region. 17504 * @param region A Region holding the current transparency information, 17505 * where any parts of the region that are set are considered to be 17506 * transparent. On return, this region will be modified to have the 17507 * transparency information reduced by the corresponding parts of the 17508 * Drawable that are not transparent. 17509 * {@hide} 17510 */ 17511 public void applyDrawableToTransparentRegion(Drawable dr, Region region) { 17512 if (DBG) { 17513 Log.i("View", "Getting transparent region for: " + this); 17514 } 17515 final Region r = dr.getTransparentRegion(); 17516 final Rect db = dr.getBounds(); 17517 final AttachInfo attachInfo = mAttachInfo; 17518 if (r != null && attachInfo != null) { 17519 final int w = getRight()-getLeft(); 17520 final int h = getBottom()-getTop(); 17521 if (db.left > 0) { 17522 //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); 17523 r.op(0, 0, db.left, h, Region.Op.UNION); 17524 } 17525 if (db.right < w) { 17526 //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); 17527 r.op(db.right, 0, w, h, Region.Op.UNION); 17528 } 17529 if (db.top > 0) { 17530 //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); 17531 r.op(0, 0, w, db.top, Region.Op.UNION); 17532 } 17533 if (db.bottom < h) { 17534 //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); 17535 r.op(0, db.bottom, w, h, Region.Op.UNION); 17536 } 17537 final int[] location = attachInfo.mTransparentLocation; 17538 getLocationInWindow(location); 17539 r.translate(location[0], location[1]); 17540 region.op(r, Region.Op.INTERSECT); 17541 } else { 17542 region.op(db, Region.Op.DIFFERENCE); 17543 } 17544 } 17545 17546 private void checkForLongClick(int delayOffset) { 17547 if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { 17548 mHasPerformedLongPress = false; 17549 17550 if (mPendingCheckForLongPress == null) { 17551 mPendingCheckForLongPress = new CheckForLongPress(); 17552 } 17553 mPendingCheckForLongPress.rememberWindowAttachCount(); 17554 postDelayed(mPendingCheckForLongPress, 17555 ViewConfiguration.getLongPressTimeout() - delayOffset); 17556 } 17557 } 17558 17559 /** 17560 * Inflate a view from an XML resource. This convenience method wraps the {@link 17561 * LayoutInflater} class, which provides a full range of options for view inflation. 17562 * 17563 * @param context The Context object for your activity or application. 17564 * @param resource The resource ID to inflate 17565 * @param root A view group that will be the parent. Used to properly inflate the 17566 * layout_* parameters. 17567 * @see LayoutInflater 17568 */ 17569 public static View inflate(Context context, int resource, ViewGroup root) { 17570 LayoutInflater factory = LayoutInflater.from(context); 17571 return factory.inflate(resource, root); 17572 } 17573 17574 /** 17575 * Scroll the view with standard behavior for scrolling beyond the normal 17576 * content boundaries. Views that call this method should override 17577 * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the 17578 * results of an over-scroll operation. 17579 * 17580 * Views can use this method to handle any touch or fling-based scrolling. 17581 * 17582 * @param deltaX Change in X in pixels 17583 * @param deltaY Change in Y in pixels 17584 * @param scrollX Current X scroll value in pixels before applying deltaX 17585 * @param scrollY Current Y scroll value in pixels before applying deltaY 17586 * @param scrollRangeX Maximum content scroll range along the X axis 17587 * @param scrollRangeY Maximum content scroll range along the Y axis 17588 * @param maxOverScrollX Number of pixels to overscroll by in either direction 17589 * along the X axis. 17590 * @param maxOverScrollY Number of pixels to overscroll by in either direction 17591 * along the Y axis. 17592 * @param isTouchEvent true if this scroll operation is the result of a touch event. 17593 * @return true if scrolling was clamped to an over-scroll boundary along either 17594 * axis, false otherwise. 17595 */ 17596 @SuppressWarnings({"UnusedParameters"}) 17597 protected boolean overScrollBy(int deltaX, int deltaY, 17598 int scrollX, int scrollY, 17599 int scrollRangeX, int scrollRangeY, 17600 int maxOverScrollX, int maxOverScrollY, 17601 boolean isTouchEvent) { 17602 final int overScrollMode = mOverScrollMode; 17603 final boolean canScrollHorizontal = 17604 computeHorizontalScrollRange() > computeHorizontalScrollExtent(); 17605 final boolean canScrollVertical = 17606 computeVerticalScrollRange() > computeVerticalScrollExtent(); 17607 final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || 17608 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); 17609 final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || 17610 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); 17611 17612 int newScrollX = scrollX + deltaX; 17613 if (!overScrollHorizontal) { 17614 maxOverScrollX = 0; 17615 } 17616 17617 int newScrollY = scrollY + deltaY; 17618 if (!overScrollVertical) { 17619 maxOverScrollY = 0; 17620 } 17621 17622 // Clamp values if at the limits and record 17623 final int left = -maxOverScrollX; 17624 final int right = maxOverScrollX + scrollRangeX; 17625 final int top = -maxOverScrollY; 17626 final int bottom = maxOverScrollY + scrollRangeY; 17627 17628 boolean clampedX = false; 17629 if (newScrollX > right) { 17630 newScrollX = right; 17631 clampedX = true; 17632 } else if (newScrollX < left) { 17633 newScrollX = left; 17634 clampedX = true; 17635 } 17636 17637 boolean clampedY = false; 17638 if (newScrollY > bottom) { 17639 newScrollY = bottom; 17640 clampedY = true; 17641 } else if (newScrollY < top) { 17642 newScrollY = top; 17643 clampedY = true; 17644 } 17645 17646 onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); 17647 17648 return clampedX || clampedY; 17649 } 17650 17651 /** 17652 * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to 17653 * respond to the results of an over-scroll operation. 17654 * 17655 * @param scrollX New X scroll value in pixels 17656 * @param scrollY New Y scroll value in pixels 17657 * @param clampedX True if scrollX was clamped to an over-scroll boundary 17658 * @param clampedY True if scrollY was clamped to an over-scroll boundary 17659 */ 17660 protected void onOverScrolled(int scrollX, int scrollY, 17661 boolean clampedX, boolean clampedY) { 17662 // Intentionally empty. 17663 } 17664 17665 /** 17666 * Returns the over-scroll mode for this view. The result will be 17667 * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 17668 * (allow over-scrolling only if the view content is larger than the container), 17669 * or {@link #OVER_SCROLL_NEVER}. 17670 * 17671 * @return This view's over-scroll mode. 17672 */ 17673 public int getOverScrollMode() { 17674 return mOverScrollMode; 17675 } 17676 17677 /** 17678 * Set the over-scroll mode for this view. Valid over-scroll modes are 17679 * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 17680 * (allow over-scrolling only if the view content is larger than the container), 17681 * or {@link #OVER_SCROLL_NEVER}. 17682 * 17683 * Setting the over-scroll mode of a view will have an effect only if the 17684 * view is capable of scrolling. 17685 * 17686 * @param overScrollMode The new over-scroll mode for this view. 17687 */ 17688 public void setOverScrollMode(int overScrollMode) { 17689 if (overScrollMode != OVER_SCROLL_ALWAYS && 17690 overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && 17691 overScrollMode != OVER_SCROLL_NEVER) { 17692 throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); 17693 } 17694 mOverScrollMode = overScrollMode; 17695 } 17696 17697 /** 17698 * Gets a scale factor that determines the distance the view should scroll 17699 * vertically in response to {@link MotionEvent#ACTION_SCROLL}. 17700 * @return The vertical scroll scale factor. 17701 * @hide 17702 */ 17703 protected float getVerticalScrollFactor() { 17704 if (mVerticalScrollFactor == 0) { 17705 TypedValue outValue = new TypedValue(); 17706 if (!mContext.getTheme().resolveAttribute( 17707 com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { 17708 throw new IllegalStateException( 17709 "Expected theme to define listPreferredItemHeight."); 17710 } 17711 mVerticalScrollFactor = outValue.getDimension( 17712 mContext.getResources().getDisplayMetrics()); 17713 } 17714 return mVerticalScrollFactor; 17715 } 17716 17717 /** 17718 * Gets a scale factor that determines the distance the view should scroll 17719 * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. 17720 * @return The horizontal scroll scale factor. 17721 * @hide 17722 */ 17723 protected float getHorizontalScrollFactor() { 17724 // TODO: Should use something else. 17725 return getVerticalScrollFactor(); 17726 } 17727 17728 /** 17729 * Return the value specifying the text direction or policy that was set with 17730 * {@link #setTextDirection(int)}. 17731 * 17732 * @return the defined text direction. It can be one of: 17733 * 17734 * {@link #TEXT_DIRECTION_INHERIT}, 17735 * {@link #TEXT_DIRECTION_FIRST_STRONG} 17736 * {@link #TEXT_DIRECTION_ANY_RTL}, 17737 * {@link #TEXT_DIRECTION_LTR}, 17738 * {@link #TEXT_DIRECTION_RTL}, 17739 * {@link #TEXT_DIRECTION_LOCALE} 17740 * 17741 * @attr ref android.R.styleable#View_textDirection 17742 * 17743 * @hide 17744 */ 17745 @ViewDebug.ExportedProperty(category = "text", mapping = { 17746 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 17747 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 17748 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 17749 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 17750 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 17751 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") 17752 }) 17753 public int getRawTextDirection() { 17754 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_MASK) >> PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 17755 } 17756 17757 /** 17758 * Set the text direction. 17759 * 17760 * @param textDirection the direction to set. Should be one of: 17761 * 17762 * {@link #TEXT_DIRECTION_INHERIT}, 17763 * {@link #TEXT_DIRECTION_FIRST_STRONG} 17764 * {@link #TEXT_DIRECTION_ANY_RTL}, 17765 * {@link #TEXT_DIRECTION_LTR}, 17766 * {@link #TEXT_DIRECTION_RTL}, 17767 * {@link #TEXT_DIRECTION_LOCALE} 17768 * 17769 * Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution 17770 * proceeds up the parent chain of the view to get the value. If there is no parent, then it will 17771 * return the default {@link #TEXT_DIRECTION_FIRST_STRONG}. 17772 * 17773 * @attr ref android.R.styleable#View_textDirection 17774 */ 17775 public void setTextDirection(int textDirection) { 17776 if (getRawTextDirection() != textDirection) { 17777 // Reset the current text direction and the resolved one 17778 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 17779 resetResolvedTextDirection(); 17780 // Set the new text direction 17781 mPrivateFlags2 |= ((textDirection << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) & PFLAG2_TEXT_DIRECTION_MASK); 17782 // Do resolution 17783 resolveTextDirection(); 17784 // Notify change 17785 onRtlPropertiesChanged(getLayoutDirection()); 17786 // Refresh 17787 requestLayout(); 17788 invalidate(true); 17789 } 17790 } 17791 17792 /** 17793 * Return the resolved text direction. 17794 * 17795 * @return the resolved text direction. Returns one of: 17796 * 17797 * {@link #TEXT_DIRECTION_FIRST_STRONG} 17798 * {@link #TEXT_DIRECTION_ANY_RTL}, 17799 * {@link #TEXT_DIRECTION_LTR}, 17800 * {@link #TEXT_DIRECTION_RTL}, 17801 * {@link #TEXT_DIRECTION_LOCALE} 17802 * 17803 * @attr ref android.R.styleable#View_textDirection 17804 */ 17805 @ViewDebug.ExportedProperty(category = "text", mapping = { 17806 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 17807 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 17808 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 17809 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 17810 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 17811 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") 17812 }) 17813 public int getTextDirection() { 17814 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED_MASK) >> PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 17815 } 17816 17817 /** 17818 * Resolve the text direction. 17819 * 17820 * @return true if resolution has been done, false otherwise. 17821 * 17822 * @hide 17823 */ 17824 public boolean resolveTextDirection() { 17825 // Reset any previous text direction resolution 17826 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 17827 17828 if (hasRtlSupport()) { 17829 // Set resolved text direction flag depending on text direction flag 17830 final int textDirection = getRawTextDirection(); 17831 switch(textDirection) { 17832 case TEXT_DIRECTION_INHERIT: 17833 if (!canResolveTextDirection()) { 17834 // We cannot do the resolution if there is no parent, so use the default one 17835 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17836 // Resolution will need to happen again later 17837 return false; 17838 } 17839 17840 // Parent has not yet resolved, so we still return the default 17841 try { 17842 if (!mParent.isTextDirectionResolved()) { 17843 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17844 // Resolution will need to happen again later 17845 return false; 17846 } 17847 } catch (AbstractMethodError e) { 17848 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 17849 " does not fully implement ViewParent", e); 17850 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED | 17851 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17852 return true; 17853 } 17854 17855 // Set current resolved direction to the same value as the parent's one 17856 int parentResolvedDirection; 17857 try { 17858 parentResolvedDirection = mParent.getTextDirection(); 17859 } catch (AbstractMethodError e) { 17860 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 17861 " does not fully implement ViewParent", e); 17862 parentResolvedDirection = TEXT_DIRECTION_LTR; 17863 } 17864 switch (parentResolvedDirection) { 17865 case TEXT_DIRECTION_FIRST_STRONG: 17866 case TEXT_DIRECTION_ANY_RTL: 17867 case TEXT_DIRECTION_LTR: 17868 case TEXT_DIRECTION_RTL: 17869 case TEXT_DIRECTION_LOCALE: 17870 mPrivateFlags2 |= 17871 (parentResolvedDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 17872 break; 17873 default: 17874 // Default resolved direction is "first strong" heuristic 17875 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17876 } 17877 break; 17878 case TEXT_DIRECTION_FIRST_STRONG: 17879 case TEXT_DIRECTION_ANY_RTL: 17880 case TEXT_DIRECTION_LTR: 17881 case TEXT_DIRECTION_RTL: 17882 case TEXT_DIRECTION_LOCALE: 17883 // Resolved direction is the same as text direction 17884 mPrivateFlags2 |= (textDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 17885 break; 17886 default: 17887 // Default resolved direction is "first strong" heuristic 17888 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17889 } 17890 } else { 17891 // Default resolved direction is "first strong" heuristic 17892 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17893 } 17894 17895 // Set to resolved 17896 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED; 17897 return true; 17898 } 17899 17900 /** 17901 * Check if text direction resolution can be done. 17902 * 17903 * @return true if text direction resolution can be done otherwise return false. 17904 */ 17905 public boolean canResolveTextDirection() { 17906 switch (getRawTextDirection()) { 17907 case TEXT_DIRECTION_INHERIT: 17908 if (mParent != null) { 17909 try { 17910 return mParent.canResolveTextDirection(); 17911 } catch (AbstractMethodError e) { 17912 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 17913 " does not fully implement ViewParent", e); 17914 } 17915 } 17916 return false; 17917 17918 default: 17919 return true; 17920 } 17921 } 17922 17923 /** 17924 * Reset resolved text direction. Text direction will be resolved during a call to 17925 * {@link #onMeasure(int, int)}. 17926 * 17927 * @hide 17928 */ 17929 public void resetResolvedTextDirection() { 17930 // Reset any previous text direction resolution 17931 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 17932 // Set to default value 17933 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 17934 } 17935 17936 /** 17937 * @return true if text direction is inherited. 17938 * 17939 * @hide 17940 */ 17941 public boolean isTextDirectionInherited() { 17942 return (getRawTextDirection() == TEXT_DIRECTION_INHERIT); 17943 } 17944 17945 /** 17946 * @return true if text direction is resolved. 17947 */ 17948 public boolean isTextDirectionResolved() { 17949 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED) == PFLAG2_TEXT_DIRECTION_RESOLVED; 17950 } 17951 17952 /** 17953 * Return the value specifying the text alignment or policy that was set with 17954 * {@link #setTextAlignment(int)}. 17955 * 17956 * @return the defined text alignment. It can be one of: 17957 * 17958 * {@link #TEXT_ALIGNMENT_INHERIT}, 17959 * {@link #TEXT_ALIGNMENT_GRAVITY}, 17960 * {@link #TEXT_ALIGNMENT_CENTER}, 17961 * {@link #TEXT_ALIGNMENT_TEXT_START}, 17962 * {@link #TEXT_ALIGNMENT_TEXT_END}, 17963 * {@link #TEXT_ALIGNMENT_VIEW_START}, 17964 * {@link #TEXT_ALIGNMENT_VIEW_END} 17965 * 17966 * @attr ref android.R.styleable#View_textAlignment 17967 * 17968 * @hide 17969 */ 17970 @ViewDebug.ExportedProperty(category = "text", mapping = { 17971 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 17972 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 17973 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 17974 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 17975 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 17976 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 17977 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 17978 }) 17979 @TextAlignment 17980 public int getRawTextAlignment() { 17981 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_MASK) >> PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 17982 } 17983 17984 /** 17985 * Set the text alignment. 17986 * 17987 * @param textAlignment The text alignment to set. Should be one of 17988 * 17989 * {@link #TEXT_ALIGNMENT_INHERIT}, 17990 * {@link #TEXT_ALIGNMENT_GRAVITY}, 17991 * {@link #TEXT_ALIGNMENT_CENTER}, 17992 * {@link #TEXT_ALIGNMENT_TEXT_START}, 17993 * {@link #TEXT_ALIGNMENT_TEXT_END}, 17994 * {@link #TEXT_ALIGNMENT_VIEW_START}, 17995 * {@link #TEXT_ALIGNMENT_VIEW_END} 17996 * 17997 * Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution 17998 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 17999 * will return the default {@link #TEXT_ALIGNMENT_GRAVITY}. 18000 * 18001 * @attr ref android.R.styleable#View_textAlignment 18002 */ 18003 public void setTextAlignment(@TextAlignment int textAlignment) { 18004 if (textAlignment != getRawTextAlignment()) { 18005 // Reset the current and resolved text alignment 18006 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 18007 resetResolvedTextAlignment(); 18008 // Set the new text alignment 18009 mPrivateFlags2 |= 18010 ((textAlignment << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) & PFLAG2_TEXT_ALIGNMENT_MASK); 18011 // Do resolution 18012 resolveTextAlignment(); 18013 // Notify change 18014 onRtlPropertiesChanged(getLayoutDirection()); 18015 // Refresh 18016 requestLayout(); 18017 invalidate(true); 18018 } 18019 } 18020 18021 /** 18022 * Return the resolved text alignment. 18023 * 18024 * @return the resolved text alignment. Returns one of: 18025 * 18026 * {@link #TEXT_ALIGNMENT_GRAVITY}, 18027 * {@link #TEXT_ALIGNMENT_CENTER}, 18028 * {@link #TEXT_ALIGNMENT_TEXT_START}, 18029 * {@link #TEXT_ALIGNMENT_TEXT_END}, 18030 * {@link #TEXT_ALIGNMENT_VIEW_START}, 18031 * {@link #TEXT_ALIGNMENT_VIEW_END} 18032 * 18033 * @attr ref android.R.styleable#View_textAlignment 18034 */ 18035 @ViewDebug.ExportedProperty(category = "text", mapping = { 18036 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 18037 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 18038 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 18039 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 18040 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 18041 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 18042 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 18043 }) 18044 @TextAlignment 18045 public int getTextAlignment() { 18046 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK) >> 18047 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 18048 } 18049 18050 /** 18051 * Resolve the text alignment. 18052 * 18053 * @return true if resolution has been done, false otherwise. 18054 * 18055 * @hide 18056 */ 18057 public boolean resolveTextAlignment() { 18058 // Reset any previous text alignment resolution 18059 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 18060 18061 if (hasRtlSupport()) { 18062 // Set resolved text alignment flag depending on text alignment flag 18063 final int textAlignment = getRawTextAlignment(); 18064 switch (textAlignment) { 18065 case TEXT_ALIGNMENT_INHERIT: 18066 // Check if we can resolve the text alignment 18067 if (!canResolveTextAlignment()) { 18068 // We cannot do the resolution if there is no parent so use the default 18069 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18070 // Resolution will need to happen again later 18071 return false; 18072 } 18073 18074 // Parent has not yet resolved, so we still return the default 18075 try { 18076 if (!mParent.isTextAlignmentResolved()) { 18077 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18078 // Resolution will need to happen again later 18079 return false; 18080 } 18081 } catch (AbstractMethodError e) { 18082 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 18083 " does not fully implement ViewParent", e); 18084 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED | 18085 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18086 return true; 18087 } 18088 18089 int parentResolvedTextAlignment; 18090 try { 18091 parentResolvedTextAlignment = mParent.getTextAlignment(); 18092 } catch (AbstractMethodError e) { 18093 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 18094 " does not fully implement ViewParent", e); 18095 parentResolvedTextAlignment = TEXT_ALIGNMENT_GRAVITY; 18096 } 18097 switch (parentResolvedTextAlignment) { 18098 case TEXT_ALIGNMENT_GRAVITY: 18099 case TEXT_ALIGNMENT_TEXT_START: 18100 case TEXT_ALIGNMENT_TEXT_END: 18101 case TEXT_ALIGNMENT_CENTER: 18102 case TEXT_ALIGNMENT_VIEW_START: 18103 case TEXT_ALIGNMENT_VIEW_END: 18104 // Resolved text alignment is the same as the parent resolved 18105 // text alignment 18106 mPrivateFlags2 |= 18107 (parentResolvedTextAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 18108 break; 18109 default: 18110 // Use default resolved text alignment 18111 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18112 } 18113 break; 18114 case TEXT_ALIGNMENT_GRAVITY: 18115 case TEXT_ALIGNMENT_TEXT_START: 18116 case TEXT_ALIGNMENT_TEXT_END: 18117 case TEXT_ALIGNMENT_CENTER: 18118 case TEXT_ALIGNMENT_VIEW_START: 18119 case TEXT_ALIGNMENT_VIEW_END: 18120 // Resolved text alignment is the same as text alignment 18121 mPrivateFlags2 |= (textAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 18122 break; 18123 default: 18124 // Use default resolved text alignment 18125 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18126 } 18127 } else { 18128 // Use default resolved text alignment 18129 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18130 } 18131 18132 // Set the resolved 18133 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED; 18134 return true; 18135 } 18136 18137 /** 18138 * Check if text alignment resolution can be done. 18139 * 18140 * @return true if text alignment resolution can be done otherwise return false. 18141 */ 18142 public boolean canResolveTextAlignment() { 18143 switch (getRawTextAlignment()) { 18144 case TEXT_DIRECTION_INHERIT: 18145 if (mParent != null) { 18146 try { 18147 return mParent.canResolveTextAlignment(); 18148 } catch (AbstractMethodError e) { 18149 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 18150 " does not fully implement ViewParent", e); 18151 } 18152 } 18153 return false; 18154 18155 default: 18156 return true; 18157 } 18158 } 18159 18160 /** 18161 * Reset resolved text alignment. Text alignment will be resolved during a call to 18162 * {@link #onMeasure(int, int)}. 18163 * 18164 * @hide 18165 */ 18166 public void resetResolvedTextAlignment() { 18167 // Reset any previous text alignment resolution 18168 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 18169 // Set to default 18170 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 18171 } 18172 18173 /** 18174 * @return true if text alignment is inherited. 18175 * 18176 * @hide 18177 */ 18178 public boolean isTextAlignmentInherited() { 18179 return (getRawTextAlignment() == TEXT_ALIGNMENT_INHERIT); 18180 } 18181 18182 /** 18183 * @return true if text alignment is resolved. 18184 */ 18185 public boolean isTextAlignmentResolved() { 18186 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED) == PFLAG2_TEXT_ALIGNMENT_RESOLVED; 18187 } 18188 18189 /** 18190 * Generate a value suitable for use in {@link #setId(int)}. 18191 * This value will not collide with ID values generated at build time by aapt for R.id. 18192 * 18193 * @return a generated ID value 18194 */ 18195 public static int generateViewId() { 18196 for (;;) { 18197 final int result = sNextGeneratedId.get(); 18198 // aapt-generated IDs have the high byte nonzero; clamp to the range under that. 18199 int newValue = result + 1; 18200 if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. 18201 if (sNextGeneratedId.compareAndSet(result, newValue)) { 18202 return result; 18203 } 18204 } 18205 } 18206 18207 // 18208 // Properties 18209 // 18210 /** 18211 * A Property wrapper around the <code>alpha</code> functionality handled by the 18212 * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. 18213 */ 18214 public static final Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { 18215 @Override 18216 public void setValue(View object, float value) { 18217 object.setAlpha(value); 18218 } 18219 18220 @Override 18221 public Float get(View object) { 18222 return object.getAlpha(); 18223 } 18224 }; 18225 18226 /** 18227 * A Property wrapper around the <code>translationX</code> functionality handled by the 18228 * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. 18229 */ 18230 public static final Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { 18231 @Override 18232 public void setValue(View object, float value) { 18233 object.setTranslationX(value); 18234 } 18235 18236 @Override 18237 public Float get(View object) { 18238 return object.getTranslationX(); 18239 } 18240 }; 18241 18242 /** 18243 * A Property wrapper around the <code>translationY</code> functionality handled by the 18244 * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. 18245 */ 18246 public static final Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { 18247 @Override 18248 public void setValue(View object, float value) { 18249 object.setTranslationY(value); 18250 } 18251 18252 @Override 18253 public Float get(View object) { 18254 return object.getTranslationY(); 18255 } 18256 }; 18257 18258 /** 18259 * A Property wrapper around the <code>x</code> functionality handled by the 18260 * {@link View#setX(float)} and {@link View#getX()} methods. 18261 */ 18262 public static final Property<View, Float> X = new FloatProperty<View>("x") { 18263 @Override 18264 public void setValue(View object, float value) { 18265 object.setX(value); 18266 } 18267 18268 @Override 18269 public Float get(View object) { 18270 return object.getX(); 18271 } 18272 }; 18273 18274 /** 18275 * A Property wrapper around the <code>y</code> functionality handled by the 18276 * {@link View#setY(float)} and {@link View#getY()} methods. 18277 */ 18278 public static final Property<View, Float> Y = new FloatProperty<View>("y") { 18279 @Override 18280 public void setValue(View object, float value) { 18281 object.setY(value); 18282 } 18283 18284 @Override 18285 public Float get(View object) { 18286 return object.getY(); 18287 } 18288 }; 18289 18290 /** 18291 * A Property wrapper around the <code>rotation</code> functionality handled by the 18292 * {@link View#setRotation(float)} and {@link View#getRotation()} methods. 18293 */ 18294 public static final Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { 18295 @Override 18296 public void setValue(View object, float value) { 18297 object.setRotation(value); 18298 } 18299 18300 @Override 18301 public Float get(View object) { 18302 return object.getRotation(); 18303 } 18304 }; 18305 18306 /** 18307 * A Property wrapper around the <code>rotationX</code> functionality handled by the 18308 * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. 18309 */ 18310 public static final Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { 18311 @Override 18312 public void setValue(View object, float value) { 18313 object.setRotationX(value); 18314 } 18315 18316 @Override 18317 public Float get(View object) { 18318 return object.getRotationX(); 18319 } 18320 }; 18321 18322 /** 18323 * A Property wrapper around the <code>rotationY</code> functionality handled by the 18324 * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. 18325 */ 18326 public static final Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { 18327 @Override 18328 public void setValue(View object, float value) { 18329 object.setRotationY(value); 18330 } 18331 18332 @Override 18333 public Float get(View object) { 18334 return object.getRotationY(); 18335 } 18336 }; 18337 18338 /** 18339 * A Property wrapper around the <code>scaleX</code> functionality handled by the 18340 * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. 18341 */ 18342 public static final Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { 18343 @Override 18344 public void setValue(View object, float value) { 18345 object.setScaleX(value); 18346 } 18347 18348 @Override 18349 public Float get(View object) { 18350 return object.getScaleX(); 18351 } 18352 }; 18353 18354 /** 18355 * A Property wrapper around the <code>scaleY</code> functionality handled by the 18356 * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. 18357 */ 18358 public static final Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { 18359 @Override 18360 public void setValue(View object, float value) { 18361 object.setScaleY(value); 18362 } 18363 18364 @Override 18365 public Float get(View object) { 18366 return object.getScaleY(); 18367 } 18368 }; 18369 18370 /** 18371 * A MeasureSpec encapsulates the layout requirements passed from parent to child. 18372 * Each MeasureSpec represents a requirement for either the width or the height. 18373 * A MeasureSpec is comprised of a size and a mode. There are three possible 18374 * modes: 18375 * <dl> 18376 * <dt>UNSPECIFIED</dt> 18377 * <dd> 18378 * The parent has not imposed any constraint on the child. It can be whatever size 18379 * it wants. 18380 * </dd> 18381 * 18382 * <dt>EXACTLY</dt> 18383 * <dd> 18384 * The parent has determined an exact size for the child. The child is going to be 18385 * given those bounds regardless of how big it wants to be. 18386 * </dd> 18387 * 18388 * <dt>AT_MOST</dt> 18389 * <dd> 18390 * The child can be as large as it wants up to the specified size. 18391 * </dd> 18392 * </dl> 18393 * 18394 * MeasureSpecs are implemented as ints to reduce object allocation. This class 18395 * is provided to pack and unpack the <size, mode> tuple into the int. 18396 */ 18397 public static class MeasureSpec { 18398 private static final int MODE_SHIFT = 30; 18399 private static final int MODE_MASK = 0x3 << MODE_SHIFT; 18400 18401 /** 18402 * Measure specification mode: The parent has not imposed any constraint 18403 * on the child. It can be whatever size it wants. 18404 */ 18405 public static final int UNSPECIFIED = 0 << MODE_SHIFT; 18406 18407 /** 18408 * Measure specification mode: The parent has determined an exact size 18409 * for the child. The child is going to be given those bounds regardless 18410 * of how big it wants to be. 18411 */ 18412 public static final int EXACTLY = 1 << MODE_SHIFT; 18413 18414 /** 18415 * Measure specification mode: The child can be as large as it wants up 18416 * to the specified size. 18417 */ 18418 public static final int AT_MOST = 2 << MODE_SHIFT; 18419 18420 /** 18421 * Creates a measure specification based on the supplied size and mode. 18422 * 18423 * The mode must always be one of the following: 18424 * <ul> 18425 * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> 18426 * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> 18427 * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> 18428 * </ul> 18429 * 18430 * <p><strong>Note:</strong> On API level 17 and lower, makeMeasureSpec's 18431 * implementation was such that the order of arguments did not matter 18432 * and overflow in either value could impact the resulting MeasureSpec. 18433 * {@link android.widget.RelativeLayout} was affected by this bug. 18434 * Apps targeting API levels greater than 17 will get the fixed, more strict 18435 * behavior.</p> 18436 * 18437 * @param size the size of the measure specification 18438 * @param mode the mode of the measure specification 18439 * @return the measure specification based on size and mode 18440 */ 18441 public static int makeMeasureSpec(int size, int mode) { 18442 if (sUseBrokenMakeMeasureSpec) { 18443 return size + mode; 18444 } else { 18445 return (size & ~MODE_MASK) | (mode & MODE_MASK); 18446 } 18447 } 18448 18449 /** 18450 * Extracts the mode from the supplied measure specification. 18451 * 18452 * @param measureSpec the measure specification to extract the mode from 18453 * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, 18454 * {@link android.view.View.MeasureSpec#AT_MOST} or 18455 * {@link android.view.View.MeasureSpec#EXACTLY} 18456 */ 18457 public static int getMode(int measureSpec) { 18458 return (measureSpec & MODE_MASK); 18459 } 18460 18461 /** 18462 * Extracts the size from the supplied measure specification. 18463 * 18464 * @param measureSpec the measure specification to extract the size from 18465 * @return the size in pixels defined in the supplied measure specification 18466 */ 18467 public static int getSize(int measureSpec) { 18468 return (measureSpec & ~MODE_MASK); 18469 } 18470 18471 static int adjust(int measureSpec, int delta) { 18472 return makeMeasureSpec(getSize(measureSpec + delta), getMode(measureSpec)); 18473 } 18474 18475 /** 18476 * Returns a String representation of the specified measure 18477 * specification. 18478 * 18479 * @param measureSpec the measure specification to convert to a String 18480 * @return a String with the following format: "MeasureSpec: MODE SIZE" 18481 */ 18482 public static String toString(int measureSpec) { 18483 int mode = getMode(measureSpec); 18484 int size = getSize(measureSpec); 18485 18486 StringBuilder sb = new StringBuilder("MeasureSpec: "); 18487 18488 if (mode == UNSPECIFIED) 18489 sb.append("UNSPECIFIED "); 18490 else if (mode == EXACTLY) 18491 sb.append("EXACTLY "); 18492 else if (mode == AT_MOST) 18493 sb.append("AT_MOST "); 18494 else 18495 sb.append(mode).append(" "); 18496 18497 sb.append(size); 18498 return sb.toString(); 18499 } 18500 } 18501 18502 class CheckForLongPress implements Runnable { 18503 18504 private int mOriginalWindowAttachCount; 18505 18506 public void run() { 18507 if (isPressed() && (mParent != null) 18508 && mOriginalWindowAttachCount == mWindowAttachCount) { 18509 if (performLongClick()) { 18510 mHasPerformedLongPress = true; 18511 } 18512 } 18513 } 18514 18515 public void rememberWindowAttachCount() { 18516 mOriginalWindowAttachCount = mWindowAttachCount; 18517 } 18518 } 18519 18520 private final class CheckForTap implements Runnable { 18521 public void run() { 18522 mPrivateFlags &= ~PFLAG_PREPRESSED; 18523 setPressed(true); 18524 checkForLongClick(ViewConfiguration.getTapTimeout()); 18525 } 18526 } 18527 18528 private final class PerformClick implements Runnable { 18529 public void run() { 18530 performClick(); 18531 } 18532 } 18533 18534 /** @hide */ 18535 public void hackTurnOffWindowResizeAnim(boolean off) { 18536 mAttachInfo.mTurnOffWindowResizeAnim = off; 18537 } 18538 18539 /** 18540 * This method returns a ViewPropertyAnimator object, which can be used to animate 18541 * specific properties on this View. 18542 * 18543 * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. 18544 */ 18545 public ViewPropertyAnimator animate() { 18546 if (mAnimator == null) { 18547 mAnimator = new ViewPropertyAnimator(this); 18548 } 18549 return mAnimator; 18550 } 18551 18552 /** 18553 * Interface definition for a callback to be invoked when a hardware key event is 18554 * dispatched to this view. The callback will be invoked before the key event is 18555 * given to the view. This is only useful for hardware keyboards; a software input 18556 * method has no obligation to trigger this listener. 18557 */ 18558 public interface OnKeyListener { 18559 /** 18560 * Called when a hardware key is dispatched to a view. This allows listeners to 18561 * get a chance to respond before the target view. 18562 * <p>Key presses in software keyboards will generally NOT trigger this method, 18563 * although some may elect to do so in some situations. Do not assume a 18564 * software input method has to be key-based; even if it is, it may use key presses 18565 * in a different way than you expect, so there is no way to reliably catch soft 18566 * input key presses. 18567 * 18568 * @param v The view the key has been dispatched to. 18569 * @param keyCode The code for the physical key that was pressed 18570 * @param event The KeyEvent object containing full information about 18571 * the event. 18572 * @return True if the listener has consumed the event, false otherwise. 18573 */ 18574 boolean onKey(View v, int keyCode, KeyEvent event); 18575 } 18576 18577 /** 18578 * Interface definition for a callback to be invoked when a touch event is 18579 * dispatched to this view. The callback will be invoked before the touch 18580 * event is given to the view. 18581 */ 18582 public interface OnTouchListener { 18583 /** 18584 * Called when a touch event is dispatched to a view. This allows listeners to 18585 * get a chance to respond before the target view. 18586 * 18587 * @param v The view the touch event has been dispatched to. 18588 * @param event The MotionEvent object containing full information about 18589 * the event. 18590 * @return True if the listener has consumed the event, false otherwise. 18591 */ 18592 boolean onTouch(View v, MotionEvent event); 18593 } 18594 18595 /** 18596 * Interface definition for a callback to be invoked when a hover event is 18597 * dispatched to this view. The callback will be invoked before the hover 18598 * event is given to the view. 18599 */ 18600 public interface OnHoverListener { 18601 /** 18602 * Called when a hover event is dispatched to a view. This allows listeners to 18603 * get a chance to respond before the target view. 18604 * 18605 * @param v The view the hover event has been dispatched to. 18606 * @param event The MotionEvent object containing full information about 18607 * the event. 18608 * @return True if the listener has consumed the event, false otherwise. 18609 */ 18610 boolean onHover(View v, MotionEvent event); 18611 } 18612 18613 /** 18614 * Interface definition for a callback to be invoked when a generic motion event is 18615 * dispatched to this view. The callback will be invoked before the generic motion 18616 * event is given to the view. 18617 */ 18618 public interface OnGenericMotionListener { 18619 /** 18620 * Called when a generic motion event is dispatched to a view. This allows listeners to 18621 * get a chance to respond before the target view. 18622 * 18623 * @param v The view the generic motion event has been dispatched to. 18624 * @param event The MotionEvent object containing full information about 18625 * the event. 18626 * @return True if the listener has consumed the event, false otherwise. 18627 */ 18628 boolean onGenericMotion(View v, MotionEvent event); 18629 } 18630 18631 /** 18632 * Interface definition for a callback to be invoked when a view has been clicked and held. 18633 */ 18634 public interface OnLongClickListener { 18635 /** 18636 * Called when a view has been clicked and held. 18637 * 18638 * @param v The view that was clicked and held. 18639 * 18640 * @return true if the callback consumed the long click, false otherwise. 18641 */ 18642 boolean onLongClick(View v); 18643 } 18644 18645 /** 18646 * Interface definition for a callback to be invoked when a drag is being dispatched 18647 * to this view. The callback will be invoked before the hosting view's own 18648 * onDrag(event) method. If the listener wants to fall back to the hosting view's 18649 * onDrag(event) behavior, it should return 'false' from this callback. 18650 * 18651 * <div class="special reference"> 18652 * <h3>Developer Guides</h3> 18653 * <p>For a guide to implementing drag and drop features, read the 18654 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 18655 * </div> 18656 */ 18657 public interface OnDragListener { 18658 /** 18659 * Called when a drag event is dispatched to a view. This allows listeners 18660 * to get a chance to override base View behavior. 18661 * 18662 * @param v The View that received the drag event. 18663 * @param event The {@link android.view.DragEvent} object for the drag event. 18664 * @return {@code true} if the drag event was handled successfully, or {@code false} 18665 * if the drag event was not handled. Note that {@code false} will trigger the View 18666 * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. 18667 */ 18668 boolean onDrag(View v, DragEvent event); 18669 } 18670 18671 /** 18672 * Interface definition for a callback to be invoked when the focus state of 18673 * a view changed. 18674 */ 18675 public interface OnFocusChangeListener { 18676 /** 18677 * Called when the focus state of a view has changed. 18678 * 18679 * @param v The view whose state has changed. 18680 * @param hasFocus The new focus state of v. 18681 */ 18682 void onFocusChange(View v, boolean hasFocus); 18683 } 18684 18685 /** 18686 * Interface definition for a callback to be invoked when a view is clicked. 18687 */ 18688 public interface OnClickListener { 18689 /** 18690 * Called when a view has been clicked. 18691 * 18692 * @param v The view that was clicked. 18693 */ 18694 void onClick(View v); 18695 } 18696 18697 /** 18698 * Interface definition for a callback to be invoked when the context menu 18699 * for this view is being built. 18700 */ 18701 public interface OnCreateContextMenuListener { 18702 /** 18703 * Called when the context menu for this view is being built. It is not 18704 * safe to hold onto the menu after this method returns. 18705 * 18706 * @param menu The context menu that is being built 18707 * @param v The view for which the context menu is being built 18708 * @param menuInfo Extra information about the item for which the 18709 * context menu should be shown. This information will vary 18710 * depending on the class of v. 18711 */ 18712 void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); 18713 } 18714 18715 /** 18716 * Interface definition for a callback to be invoked when the status bar changes 18717 * visibility. This reports <strong>global</strong> changes to the system UI 18718 * state, not what the application is requesting. 18719 * 18720 * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) 18721 */ 18722 public interface OnSystemUiVisibilityChangeListener { 18723 /** 18724 * Called when the status bar changes visibility because of a call to 18725 * {@link View#setSystemUiVisibility(int)}. 18726 * 18727 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 18728 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, and {@link #SYSTEM_UI_FLAG_FULLSCREEN}. 18729 * This tells you the <strong>global</strong> state of these UI visibility 18730 * flags, not what your app is currently applying. 18731 */ 18732 public void onSystemUiVisibilityChange(int visibility); 18733 } 18734 18735 /** 18736 * Interface definition for a callback to be invoked when this view is attached 18737 * or detached from its window. 18738 */ 18739 public interface OnAttachStateChangeListener { 18740 /** 18741 * Called when the view is attached to a window. 18742 * @param v The view that was attached 18743 */ 18744 public void onViewAttachedToWindow(View v); 18745 /** 18746 * Called when the view is detached from a window. 18747 * @param v The view that was detached 18748 */ 18749 public void onViewDetachedFromWindow(View v); 18750 } 18751 18752 private final class UnsetPressedState implements Runnable { 18753 public void run() { 18754 setPressed(false); 18755 } 18756 } 18757 18758 /** 18759 * Base class for derived classes that want to save and restore their own 18760 * state in {@link android.view.View#onSaveInstanceState()}. 18761 */ 18762 public static class BaseSavedState extends AbsSavedState { 18763 /** 18764 * Constructor used when reading from a parcel. Reads the state of the superclass. 18765 * 18766 * @param source 18767 */ 18768 public BaseSavedState(Parcel source) { 18769 super(source); 18770 } 18771 18772 /** 18773 * Constructor called by derived classes when creating their SavedState objects 18774 * 18775 * @param superState The state of the superclass of this view 18776 */ 18777 public BaseSavedState(Parcelable superState) { 18778 super(superState); 18779 } 18780 18781 public static final Parcelable.Creator<BaseSavedState> CREATOR = 18782 new Parcelable.Creator<BaseSavedState>() { 18783 public BaseSavedState createFromParcel(Parcel in) { 18784 return new BaseSavedState(in); 18785 } 18786 18787 public BaseSavedState[] newArray(int size) { 18788 return new BaseSavedState[size]; 18789 } 18790 }; 18791 } 18792 18793 /** 18794 * A set of information given to a view when it is attached to its parent 18795 * window. 18796 */ 18797 static class AttachInfo { 18798 interface Callbacks { 18799 void playSoundEffect(int effectId); 18800 boolean performHapticFeedback(int effectId, boolean always); 18801 } 18802 18803 /** 18804 * InvalidateInfo is used to post invalidate(int, int, int, int) messages 18805 * to a Handler. This class contains the target (View) to invalidate and 18806 * the coordinates of the dirty rectangle. 18807 * 18808 * For performance purposes, this class also implements a pool of up to 18809 * POOL_LIMIT objects that get reused. This reduces memory allocations 18810 * whenever possible. 18811 */ 18812 static class InvalidateInfo { 18813 private static final int POOL_LIMIT = 10; 18814 18815 private static final SynchronizedPool<InvalidateInfo> sPool = 18816 new SynchronizedPool<InvalidateInfo>(POOL_LIMIT); 18817 18818 View target; 18819 18820 int left; 18821 int top; 18822 int right; 18823 int bottom; 18824 18825 public static InvalidateInfo obtain() { 18826 InvalidateInfo instance = sPool.acquire(); 18827 return (instance != null) ? instance : new InvalidateInfo(); 18828 } 18829 18830 public void recycle() { 18831 target = null; 18832 sPool.release(this); 18833 } 18834 } 18835 18836 final IWindowSession mSession; 18837 18838 final IWindow mWindow; 18839 18840 final IBinder mWindowToken; 18841 18842 final Display mDisplay; 18843 18844 final Callbacks mRootCallbacks; 18845 18846 HardwareCanvas mHardwareCanvas; 18847 18848 IWindowId mIWindowId; 18849 WindowId mWindowId; 18850 18851 /** 18852 * The top view of the hierarchy. 18853 */ 18854 View mRootView; 18855 18856 IBinder mPanelParentWindowToken; 18857 18858 boolean mHardwareAccelerated; 18859 boolean mHardwareAccelerationRequested; 18860 HardwareRenderer mHardwareRenderer; 18861 18862 boolean mScreenOn; 18863 18864 /** 18865 * Scale factor used by the compatibility mode 18866 */ 18867 float mApplicationScale; 18868 18869 /** 18870 * Indicates whether the application is in compatibility mode 18871 */ 18872 boolean mScalingRequired; 18873 18874 /** 18875 * If set, ViewRootImpl doesn't use its lame animation for when the window resizes. 18876 */ 18877 boolean mTurnOffWindowResizeAnim; 18878 18879 /** 18880 * Left position of this view's window 18881 */ 18882 int mWindowLeft; 18883 18884 /** 18885 * Top position of this view's window 18886 */ 18887 int mWindowTop; 18888 18889 /** 18890 * Indicates whether views need to use 32-bit drawing caches 18891 */ 18892 boolean mUse32BitDrawingCache; 18893 18894 /** 18895 * For windows that are full-screen but using insets to layout inside 18896 * of the screen areas, these are the current insets to appear inside 18897 * the overscan area of the display. 18898 */ 18899 final Rect mOverscanInsets = new Rect(); 18900 18901 /** 18902 * For windows that are full-screen but using insets to layout inside 18903 * of the screen decorations, these are the current insets for the 18904 * content of the window. 18905 */ 18906 final Rect mContentInsets = new Rect(); 18907 18908 /** 18909 * For windows that are full-screen but using insets to layout inside 18910 * of the screen decorations, these are the current insets for the 18911 * actual visible parts of the window. 18912 */ 18913 final Rect mVisibleInsets = new Rect(); 18914 18915 /** 18916 * The internal insets given by this window. This value is 18917 * supplied by the client (through 18918 * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will 18919 * be given to the window manager when changed to be used in laying 18920 * out windows behind it. 18921 */ 18922 final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets 18923 = new ViewTreeObserver.InternalInsetsInfo(); 18924 18925 /** 18926 * Set to true when mGivenInternalInsets is non-empty. 18927 */ 18928 boolean mHasNonEmptyGivenInternalInsets; 18929 18930 /** 18931 * All views in the window's hierarchy that serve as scroll containers, 18932 * used to determine if the window can be resized or must be panned 18933 * to adjust for a soft input area. 18934 */ 18935 final ArrayList<View> mScrollContainers = new ArrayList<View>(); 18936 18937 final KeyEvent.DispatcherState mKeyDispatchState 18938 = new KeyEvent.DispatcherState(); 18939 18940 /** 18941 * Indicates whether the view's window currently has the focus. 18942 */ 18943 boolean mHasWindowFocus; 18944 18945 /** 18946 * The current visibility of the window. 18947 */ 18948 int mWindowVisibility; 18949 18950 /** 18951 * Indicates the time at which drawing started to occur. 18952 */ 18953 long mDrawingTime; 18954 18955 /** 18956 * Indicates whether or not ignoring the DIRTY_MASK flags. 18957 */ 18958 boolean mIgnoreDirtyState; 18959 18960 /** 18961 * This flag tracks when the mIgnoreDirtyState flag is set during draw(), 18962 * to avoid clearing that flag prematurely. 18963 */ 18964 boolean mSetIgnoreDirtyState = false; 18965 18966 /** 18967 * Indicates whether the view's window is currently in touch mode. 18968 */ 18969 boolean mInTouchMode; 18970 18971 /** 18972 * Indicates that ViewAncestor should trigger a global layout change 18973 * the next time it performs a traversal 18974 */ 18975 boolean mRecomputeGlobalAttributes; 18976 18977 /** 18978 * Always report new attributes at next traversal. 18979 */ 18980 boolean mForceReportNewAttributes; 18981 18982 /** 18983 * Set during a traveral if any views want to keep the screen on. 18984 */ 18985 boolean mKeepScreenOn; 18986 18987 /** 18988 * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). 18989 */ 18990 int mSystemUiVisibility; 18991 18992 /** 18993 * Hack to force certain system UI visibility flags to be cleared. 18994 */ 18995 int mDisabledSystemUiVisibility; 18996 18997 /** 18998 * Last global system UI visibility reported by the window manager. 18999 */ 19000 int mGlobalSystemUiVisibility; 19001 19002 /** 19003 * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener 19004 * attached. 19005 */ 19006 boolean mHasSystemUiListeners; 19007 19008 /** 19009 * Set if the window has requested to extend into the overscan region 19010 * via WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN. 19011 */ 19012 boolean mOverscanRequested; 19013 19014 /** 19015 * Set if the visibility of any views has changed. 19016 */ 19017 boolean mViewVisibilityChanged; 19018 19019 /** 19020 * Set to true if a view has been scrolled. 19021 */ 19022 boolean mViewScrollChanged; 19023 19024 /** 19025 * Global to the view hierarchy used as a temporary for dealing with 19026 * x/y points in the transparent region computations. 19027 */ 19028 final int[] mTransparentLocation = new int[2]; 19029 19030 /** 19031 * Global to the view hierarchy used as a temporary for dealing with 19032 * x/y points in the ViewGroup.invalidateChild implementation. 19033 */ 19034 final int[] mInvalidateChildLocation = new int[2]; 19035 19036 19037 /** 19038 * Global to the view hierarchy used as a temporary for dealing with 19039 * x/y location when view is transformed. 19040 */ 19041 final float[] mTmpTransformLocation = new float[2]; 19042 19043 /** 19044 * The view tree observer used to dispatch global events like 19045 * layout, pre-draw, touch mode change, etc. 19046 */ 19047 final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); 19048 19049 /** 19050 * A Canvas used by the view hierarchy to perform bitmap caching. 19051 */ 19052 Canvas mCanvas; 19053 19054 /** 19055 * The view root impl. 19056 */ 19057 final ViewRootImpl mViewRootImpl; 19058 19059 /** 19060 * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This 19061 * handler can be used to pump events in the UI events queue. 19062 */ 19063 final Handler mHandler; 19064 19065 /** 19066 * Temporary for use in computing invalidate rectangles while 19067 * calling up the hierarchy. 19068 */ 19069 final Rect mTmpInvalRect = new Rect(); 19070 19071 /** 19072 * Temporary for use in computing hit areas with transformed views 19073 */ 19074 final RectF mTmpTransformRect = new RectF(); 19075 19076 /** 19077 * Temporary for use in transforming invalidation rect 19078 */ 19079 final Matrix mTmpMatrix = new Matrix(); 19080 19081 /** 19082 * Temporary for use in transforming invalidation rect 19083 */ 19084 final Transformation mTmpTransformation = new Transformation(); 19085 19086 /** 19087 * Temporary list for use in collecting focusable descendents of a view. 19088 */ 19089 final ArrayList<View> mTempArrayList = new ArrayList<View>(24); 19090 19091 /** 19092 * The id of the window for accessibility purposes. 19093 */ 19094 int mAccessibilityWindowId = View.NO_ID; 19095 19096 /** 19097 * Flags related to accessibility processing. 19098 * 19099 * @see AccessibilityNodeInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 19100 * @see AccessibilityNodeInfo#FLAG_REPORT_VIEW_IDS 19101 */ 19102 int mAccessibilityFetchFlags; 19103 19104 /** 19105 * The drawable for highlighting accessibility focus. 19106 */ 19107 Drawable mAccessibilityFocusDrawable; 19108 19109 /** 19110 * Show where the margins, bounds and layout bounds are for each view. 19111 */ 19112 boolean mDebugLayout = SystemProperties.getBoolean(DEBUG_LAYOUT_PROPERTY, false); 19113 19114 /** 19115 * Point used to compute visible regions. 19116 */ 19117 final Point mPoint = new Point(); 19118 19119 /** 19120 * Used to track which View originated a requestLayout() call, used when 19121 * requestLayout() is called during layout. 19122 */ 19123 View mViewRequestingLayout; 19124 19125 /** 19126 * Creates a new set of attachment information with the specified 19127 * events handler and thread. 19128 * 19129 * @param handler the events handler the view must use 19130 */ 19131 AttachInfo(IWindowSession session, IWindow window, Display display, 19132 ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { 19133 mSession = session; 19134 mWindow = window; 19135 mWindowToken = window.asBinder(); 19136 mDisplay = display; 19137 mViewRootImpl = viewRootImpl; 19138 mHandler = handler; 19139 mRootCallbacks = effectPlayer; 19140 } 19141 } 19142 19143 /** 19144 * <p>ScrollabilityCache holds various fields used by a View when scrolling 19145 * is supported. This avoids keeping too many unused fields in most 19146 * instances of View.</p> 19147 */ 19148 private static class ScrollabilityCache implements Runnable { 19149 19150 /** 19151 * Scrollbars are not visible 19152 */ 19153 public static final int OFF = 0; 19154 19155 /** 19156 * Scrollbars are visible 19157 */ 19158 public static final int ON = 1; 19159 19160 /** 19161 * Scrollbars are fading away 19162 */ 19163 public static final int FADING = 2; 19164 19165 public boolean fadeScrollBars; 19166 19167 public int fadingEdgeLength; 19168 public int scrollBarDefaultDelayBeforeFade; 19169 public int scrollBarFadeDuration; 19170 19171 public int scrollBarSize; 19172 public ScrollBarDrawable scrollBar; 19173 public float[] interpolatorValues; 19174 public View host; 19175 19176 public final Paint paint; 19177 public final Matrix matrix; 19178 public Shader shader; 19179 19180 public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); 19181 19182 private static final float[] OPAQUE = { 255 }; 19183 private static final float[] TRANSPARENT = { 0.0f }; 19184 19185 /** 19186 * When fading should start. This time moves into the future every time 19187 * a new scroll happens. Measured based on SystemClock.uptimeMillis() 19188 */ 19189 public long fadeStartTime; 19190 19191 19192 /** 19193 * The current state of the scrollbars: ON, OFF, or FADING 19194 */ 19195 public int state = OFF; 19196 19197 private int mLastColor; 19198 19199 public ScrollabilityCache(ViewConfiguration configuration, View host) { 19200 fadingEdgeLength = configuration.getScaledFadingEdgeLength(); 19201 scrollBarSize = configuration.getScaledScrollBarSize(); 19202 scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); 19203 scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); 19204 19205 paint = new Paint(); 19206 matrix = new Matrix(); 19207 // use use a height of 1, and then wack the matrix each time we 19208 // actually use it. 19209 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 19210 paint.setShader(shader); 19211 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 19212 19213 this.host = host; 19214 } 19215 19216 public void setFadeColor(int color) { 19217 if (color != mLastColor) { 19218 mLastColor = color; 19219 19220 if (color != 0) { 19221 shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, 19222 color & 0x00FFFFFF, Shader.TileMode.CLAMP); 19223 paint.setShader(shader); 19224 // Restore the default transfer mode (src_over) 19225 paint.setXfermode(null); 19226 } else { 19227 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 19228 paint.setShader(shader); 19229 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 19230 } 19231 } 19232 } 19233 19234 public void run() { 19235 long now = AnimationUtils.currentAnimationTimeMillis(); 19236 if (now >= fadeStartTime) { 19237 19238 // the animation fades the scrollbars out by changing 19239 // the opacity (alpha) from fully opaque to fully 19240 // transparent 19241 int nextFrame = (int) now; 19242 int framesCount = 0; 19243 19244 Interpolator interpolator = scrollBarInterpolator; 19245 19246 // Start opaque 19247 interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); 19248 19249 // End transparent 19250 nextFrame += scrollBarFadeDuration; 19251 interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); 19252 19253 state = FADING; 19254 19255 // Kick off the fade animation 19256 host.invalidate(true); 19257 } 19258 } 19259 } 19260 19261 /** 19262 * Resuable callback for sending 19263 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 19264 */ 19265 private class SendViewScrolledAccessibilityEvent implements Runnable { 19266 public volatile boolean mIsPending; 19267 19268 public void run() { 19269 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); 19270 mIsPending = false; 19271 } 19272 } 19273 19274 /** 19275 * <p> 19276 * This class represents a delegate that can be registered in a {@link View} 19277 * to enhance accessibility support via composition rather via inheritance. 19278 * It is specifically targeted to widget developers that extend basic View 19279 * classes i.e. classes in package android.view, that would like their 19280 * applications to be backwards compatible. 19281 * </p> 19282 * <div class="special reference"> 19283 * <h3>Developer Guides</h3> 19284 * <p>For more information about making applications accessible, read the 19285 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 19286 * developer guide.</p> 19287 * </div> 19288 * <p> 19289 * A scenario in which a developer would like to use an accessibility delegate 19290 * is overriding a method introduced in a later API version then the minimal API 19291 * version supported by the application. For example, the method 19292 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available 19293 * in API version 4 when the accessibility APIs were first introduced. If a 19294 * developer would like his application to run on API version 4 devices (assuming 19295 * all other APIs used by the application are version 4 or lower) and take advantage 19296 * of this method, instead of overriding the method which would break the application's 19297 * backwards compatibility, he can override the corresponding method in this 19298 * delegate and register the delegate in the target View if the API version of 19299 * the system is high enough i.e. the API version is same or higher to the API 19300 * version that introduced 19301 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. 19302 * </p> 19303 * <p> 19304 * Here is an example implementation: 19305 * </p> 19306 * <code><pre><p> 19307 * if (Build.VERSION.SDK_INT >= 14) { 19308 * // If the API version is equal of higher than the version in 19309 * // which onInitializeAccessibilityNodeInfo was introduced we 19310 * // register a delegate with a customized implementation. 19311 * View view = findViewById(R.id.view_id); 19312 * view.setAccessibilityDelegate(new AccessibilityDelegate() { 19313 * public void onInitializeAccessibilityNodeInfo(View host, 19314 * AccessibilityNodeInfo info) { 19315 * // Let the default implementation populate the info. 19316 * super.onInitializeAccessibilityNodeInfo(host, info); 19317 * // Set some other information. 19318 * info.setEnabled(host.isEnabled()); 19319 * } 19320 * }); 19321 * } 19322 * </code></pre></p> 19323 * <p> 19324 * This delegate contains methods that correspond to the accessibility methods 19325 * in View. If a delegate has been specified the implementation in View hands 19326 * off handling to the corresponding method in this delegate. The default 19327 * implementation the delegate methods behaves exactly as the corresponding 19328 * method in View for the case of no accessibility delegate been set. Hence, 19329 * to customize the behavior of a View method, clients can override only the 19330 * corresponding delegate method without altering the behavior of the rest 19331 * accessibility related methods of the host view. 19332 * </p> 19333 */ 19334 public static class AccessibilityDelegate { 19335 19336 /** 19337 * Sends an accessibility event of the given type. If accessibility is not 19338 * enabled this method has no effect. 19339 * <p> 19340 * The default implementation behaves as {@link View#sendAccessibilityEvent(int) 19341 * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate 19342 * been set. 19343 * </p> 19344 * 19345 * @param host The View hosting the delegate. 19346 * @param eventType The type of the event to send. 19347 * 19348 * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) 19349 */ 19350 public void sendAccessibilityEvent(View host, int eventType) { 19351 host.sendAccessibilityEventInternal(eventType); 19352 } 19353 19354 /** 19355 * Performs the specified accessibility action on the view. For 19356 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 19357 * <p> 19358 * The default implementation behaves as 19359 * {@link View#performAccessibilityAction(int, Bundle) 19360 * View#performAccessibilityAction(int, Bundle)} for the case of 19361 * no accessibility delegate been set. 19362 * </p> 19363 * 19364 * @param action The action to perform. 19365 * @return Whether the action was performed. 19366 * 19367 * @see View#performAccessibilityAction(int, Bundle) 19368 * View#performAccessibilityAction(int, Bundle) 19369 */ 19370 public boolean performAccessibilityAction(View host, int action, Bundle args) { 19371 return host.performAccessibilityActionInternal(action, args); 19372 } 19373 19374 /** 19375 * Sends an accessibility event. This method behaves exactly as 19376 * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an 19377 * empty {@link AccessibilityEvent} and does not perform a check whether 19378 * accessibility is enabled. 19379 * <p> 19380 * The default implementation behaves as 19381 * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) 19382 * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for 19383 * the case of no accessibility delegate been set. 19384 * </p> 19385 * 19386 * @param host The View hosting the delegate. 19387 * @param event The event to send. 19388 * 19389 * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) 19390 * View#sendAccessibilityEventUnchecked(AccessibilityEvent) 19391 */ 19392 public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { 19393 host.sendAccessibilityEventUncheckedInternal(event); 19394 } 19395 19396 /** 19397 * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then 19398 * to its children for adding their text content to the event. 19399 * <p> 19400 * The default implementation behaves as 19401 * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 19402 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for 19403 * the case of no accessibility delegate been set. 19404 * </p> 19405 * 19406 * @param host The View hosting the delegate. 19407 * @param event The event. 19408 * @return True if the event population was completed. 19409 * 19410 * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 19411 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 19412 */ 19413 public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 19414 return host.dispatchPopulateAccessibilityEventInternal(event); 19415 } 19416 19417 /** 19418 * Gives a chance to the host View to populate the accessibility event with its 19419 * text content. 19420 * <p> 19421 * The default implementation behaves as 19422 * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) 19423 * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for 19424 * the case of no accessibility delegate been set. 19425 * </p> 19426 * 19427 * @param host The View hosting the delegate. 19428 * @param event The accessibility event which to populate. 19429 * 19430 * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) 19431 * View#onPopulateAccessibilityEvent(AccessibilityEvent) 19432 */ 19433 public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 19434 host.onPopulateAccessibilityEventInternal(event); 19435 } 19436 19437 /** 19438 * Initializes an {@link AccessibilityEvent} with information about the 19439 * the host View which is the event source. 19440 * <p> 19441 * The default implementation behaves as 19442 * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) 19443 * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for 19444 * the case of no accessibility delegate been set. 19445 * </p> 19446 * 19447 * @param host The View hosting the delegate. 19448 * @param event The event to initialize. 19449 * 19450 * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) 19451 * View#onInitializeAccessibilityEvent(AccessibilityEvent) 19452 */ 19453 public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 19454 host.onInitializeAccessibilityEventInternal(event); 19455 } 19456 19457 /** 19458 * Initializes an {@link AccessibilityNodeInfo} with information about the host view. 19459 * <p> 19460 * The default implementation behaves as 19461 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 19462 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for 19463 * the case of no accessibility delegate been set. 19464 * </p> 19465 * 19466 * @param host The View hosting the delegate. 19467 * @param info The instance to initialize. 19468 * 19469 * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 19470 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 19471 */ 19472 public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { 19473 host.onInitializeAccessibilityNodeInfoInternal(info); 19474 } 19475 19476 /** 19477 * Called when a child of the host View has requested sending an 19478 * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) 19479 * to augment the event. 19480 * <p> 19481 * The default implementation behaves as 19482 * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 19483 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for 19484 * the case of no accessibility delegate been set. 19485 * </p> 19486 * 19487 * @param host The View hosting the delegate. 19488 * @param child The child which requests sending the event. 19489 * @param event The event to be sent. 19490 * @return True if the event should be sent 19491 * 19492 * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 19493 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 19494 */ 19495 public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, 19496 AccessibilityEvent event) { 19497 return host.onRequestSendAccessibilityEventInternal(child, event); 19498 } 19499 19500 /** 19501 * Gets the provider for managing a virtual view hierarchy rooted at this View 19502 * and reported to {@link android.accessibilityservice.AccessibilityService}s 19503 * that explore the window content. 19504 * <p> 19505 * The default implementation behaves as 19506 * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for 19507 * the case of no accessibility delegate been set. 19508 * </p> 19509 * 19510 * @return The provider. 19511 * 19512 * @see AccessibilityNodeProvider 19513 */ 19514 public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { 19515 return null; 19516 } 19517 19518 /** 19519 * Returns an {@link AccessibilityNodeInfo} representing the host view from the 19520 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 19521 * This method is responsible for obtaining an accessibility node info from a 19522 * pool of reusable instances and calling 19523 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on the host 19524 * view to initialize the former. 19525 * <p> 19526 * <strong>Note:</strong> The client is responsible for recycling the obtained 19527 * instance by calling {@link AccessibilityNodeInfo#recycle()} to minimize object 19528 * creation. 19529 * </p> 19530 * <p> 19531 * The default implementation behaves as 19532 * {@link View#createAccessibilityNodeInfo() View#createAccessibilityNodeInfo()} for 19533 * the case of no accessibility delegate been set. 19534 * </p> 19535 * @return A populated {@link AccessibilityNodeInfo}. 19536 * 19537 * @see AccessibilityNodeInfo 19538 * 19539 * @hide 19540 */ 19541 public AccessibilityNodeInfo createAccessibilityNodeInfo(View host) { 19542 return host.createAccessibilityNodeInfoInternal(); 19543 } 19544 } 19545 19546 private class MatchIdPredicate implements Predicate<View> { 19547 public int mId; 19548 19549 @Override 19550 public boolean apply(View view) { 19551 return (view.mID == mId); 19552 } 19553 } 19554 19555 private class MatchLabelForPredicate implements Predicate<View> { 19556 private int mLabeledId; 19557 19558 @Override 19559 public boolean apply(View view) { 19560 return (view.mLabelForId == mLabeledId); 19561 } 19562 } 19563 19564 private class SendViewStateChangedAccessibilityEvent implements Runnable { 19565 private int mChangeTypes = 0; 19566 private boolean mPosted; 19567 private boolean mPostedWithDelay; 19568 private long mLastEventTimeMillis; 19569 19570 @Override 19571 public void run() { 19572 mPosted = false; 19573 mPostedWithDelay = false; 19574 mLastEventTimeMillis = SystemClock.uptimeMillis(); 19575 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 19576 final AccessibilityEvent event = AccessibilityEvent.obtain(); 19577 event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); 19578 event.setContentChangeTypes(mChangeTypes); 19579 sendAccessibilityEventUnchecked(event); 19580 } 19581 mChangeTypes = 0; 19582 } 19583 19584 public void runOrPost(int changeType) { 19585 mChangeTypes |= changeType; 19586 19587 // If this is a live region or the child of a live region, collect 19588 // all events from this frame and send them on the next frame. 19589 if (inLiveRegion()) { 19590 // If we're already posted with a delay, remove that. 19591 if (mPostedWithDelay) { 19592 removeCallbacks(this); 19593 mPostedWithDelay = false; 19594 } 19595 // Only post if we're not already posted. 19596 if (!mPosted) { 19597 post(this); 19598 mPosted = true; 19599 } 19600 return; 19601 } 19602 19603 if (mPosted) { 19604 return; 19605 } 19606 final long timeSinceLastMillis = SystemClock.uptimeMillis() - mLastEventTimeMillis; 19607 final long minEventIntevalMillis = 19608 ViewConfiguration.getSendRecurringAccessibilityEventsInterval(); 19609 if (timeSinceLastMillis >= minEventIntevalMillis) { 19610 removeCallbacks(this); 19611 run(); 19612 } else { 19613 postDelayed(this, minEventIntevalMillis - timeSinceLastMillis); 19614 mPosted = true; 19615 mPostedWithDelay = true; 19616 } 19617 } 19618 } 19619 19620 private boolean inLiveRegion() { 19621 if (getAccessibilityLiveRegion() != View.ACCESSIBILITY_LIVE_REGION_NONE) { 19622 return true; 19623 } 19624 19625 ViewParent parent = getParent(); 19626 while (parent instanceof View) { 19627 if (((View) parent).getAccessibilityLiveRegion() 19628 != View.ACCESSIBILITY_LIVE_REGION_NONE) { 19629 return true; 19630 } 19631 parent = parent.getParent(); 19632 } 19633 19634 return false; 19635 } 19636 19637 /** 19638 * Dump all private flags in readable format, useful for documentation and 19639 * sanity checking. 19640 */ 19641 private static void dumpFlags() { 19642 final HashMap<String, String> found = Maps.newHashMap(); 19643 try { 19644 for (Field field : View.class.getDeclaredFields()) { 19645 final int modifiers = field.getModifiers(); 19646 if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) { 19647 if (field.getType().equals(int.class)) { 19648 final int value = field.getInt(null); 19649 dumpFlag(found, field.getName(), value); 19650 } else if (field.getType().equals(int[].class)) { 19651 final int[] values = (int[]) field.get(null); 19652 for (int i = 0; i < values.length; i++) { 19653 dumpFlag(found, field.getName() + "[" + i + "]", values[i]); 19654 } 19655 } 19656 } 19657 } 19658 } catch (IllegalAccessException e) { 19659 throw new RuntimeException(e); 19660 } 19661 19662 final ArrayList<String> keys = Lists.newArrayList(); 19663 keys.addAll(found.keySet()); 19664 Collections.sort(keys); 19665 for (String key : keys) { 19666 Log.d(VIEW_LOG_TAG, found.get(key)); 19667 } 19668 } 19669 19670 private static void dumpFlag(HashMap<String, String> found, String name, int value) { 19671 // Sort flags by prefix, then by bits, always keeping unique keys 19672 final String bits = String.format("%32s", Integer.toBinaryString(value)).replace('0', ' '); 19673 final int prefix = name.indexOf('_'); 19674 final String key = (prefix > 0 ? name.substring(0, prefix) : name) + bits + name; 19675 final String output = bits + " " + name; 19676 found.put(key, output); 19677 } 19678} 19679