View.java revision 725fc438a1399db0155af9ea819abdd66861dc51
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.content.ClipData; 20import android.content.Context; 21import android.content.res.Configuration; 22import android.content.res.Resources; 23import android.content.res.TypedArray; 24import android.graphics.Bitmap; 25import android.graphics.Camera; 26import android.graphics.Canvas; 27import android.graphics.Insets; 28import android.graphics.Interpolator; 29import android.graphics.LinearGradient; 30import android.graphics.Matrix; 31import android.graphics.Paint; 32import android.graphics.PixelFormat; 33import android.graphics.Point; 34import android.graphics.PorterDuff; 35import android.graphics.PorterDuffXfermode; 36import android.graphics.Rect; 37import android.graphics.RectF; 38import android.graphics.Region; 39import android.graphics.Shader; 40import android.graphics.drawable.ColorDrawable; 41import android.graphics.drawable.Drawable; 42import android.hardware.display.DisplayManagerGlobal; 43import android.os.Bundle; 44import android.os.Handler; 45import android.os.IBinder; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.RemoteException; 49import android.os.SystemClock; 50import android.os.SystemProperties; 51import android.text.TextUtils; 52import android.util.AttributeSet; 53import android.util.FloatProperty; 54import android.util.Log; 55import android.util.Pool; 56import android.util.Poolable; 57import android.util.PoolableManager; 58import android.util.Pools; 59import android.util.Property; 60import android.util.SparseArray; 61import android.util.TypedValue; 62import android.view.ContextMenu.ContextMenuInfo; 63import android.view.AccessibilityIterators.TextSegmentIterator; 64import android.view.AccessibilityIterators.CharacterTextSegmentIterator; 65import android.view.AccessibilityIterators.WordTextSegmentIterator; 66import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; 67import android.view.accessibility.AccessibilityEvent; 68import android.view.accessibility.AccessibilityEventSource; 69import android.view.accessibility.AccessibilityManager; 70import android.view.accessibility.AccessibilityNodeInfo; 71import android.view.accessibility.AccessibilityNodeProvider; 72import android.view.animation.Animation; 73import android.view.animation.AnimationUtils; 74import android.view.animation.Transformation; 75import android.view.inputmethod.EditorInfo; 76import android.view.inputmethod.InputConnection; 77import android.view.inputmethod.InputMethodManager; 78import android.widget.ScrollBarDrawable; 79 80import static android.os.Build.VERSION_CODES.*; 81import static java.lang.Math.max; 82 83import com.android.internal.R; 84import com.android.internal.util.Predicate; 85import com.android.internal.view.menu.MenuBuilder; 86import com.google.android.collect.Lists; 87import com.google.android.collect.Maps; 88 89import java.lang.ref.WeakReference; 90import java.lang.reflect.Field; 91import java.lang.reflect.InvocationTargetException; 92import java.lang.reflect.Method; 93import java.lang.reflect.Modifier; 94import java.util.ArrayList; 95import java.util.Arrays; 96import java.util.Collections; 97import java.util.HashMap; 98import java.util.Locale; 99import java.util.concurrent.CopyOnWriteArrayList; 100import java.util.concurrent.atomic.AtomicInteger; 101 102/** 103 * <p> 104 * This class represents the basic building block for user interface components. A View 105 * occupies a rectangular area on the screen and is responsible for drawing and 106 * event handling. View is the base class for <em>widgets</em>, which are 107 * used to create interactive UI components (buttons, text fields, etc.). The 108 * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which 109 * are invisible containers that hold other Views (or other ViewGroups) and define 110 * their layout properties. 111 * </p> 112 * 113 * <div class="special reference"> 114 * <h3>Developer Guides</h3> 115 * <p>For information about using this class to develop your application's user interface, 116 * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. 117 * </div> 118 * 119 * <a name="Using"></a> 120 * <h3>Using Views</h3> 121 * <p> 122 * All of the views in a window are arranged in a single tree. You can add views 123 * either from code or by specifying a tree of views in one or more XML layout 124 * files. There are many specialized subclasses of views that act as controls or 125 * are capable of displaying text, images, or other content. 126 * </p> 127 * <p> 128 * Once you have created a tree of views, there are typically a few types of 129 * common operations you may wish to perform: 130 * <ul> 131 * <li><strong>Set properties:</strong> for example setting the text of a 132 * {@link android.widget.TextView}. The available properties and the methods 133 * that set them will vary among the different subclasses of views. Note that 134 * properties that are known at build time can be set in the XML layout 135 * files.</li> 136 * <li><strong>Set focus:</strong> The framework will handled moving focus in 137 * response to user input. To force focus to a specific view, call 138 * {@link #requestFocus}.</li> 139 * <li><strong>Set up listeners:</strong> Views allow clients to set listeners 140 * that will be notified when something interesting happens to the view. For 141 * example, all views will let you set a listener to be notified when the view 142 * gains or loses focus. You can register such a listener using 143 * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. 144 * Other view subclasses offer more specialized listeners. For example, a Button 145 * exposes a listener to notify clients when the button is clicked.</li> 146 * <li><strong>Set visibility:</strong> You can hide or show views using 147 * {@link #setVisibility(int)}.</li> 148 * </ul> 149 * </p> 150 * <p><em> 151 * Note: The Android framework is responsible for measuring, laying out and 152 * drawing views. You should not call methods that perform these actions on 153 * views yourself unless you are actually implementing a 154 * {@link android.view.ViewGroup}. 155 * </em></p> 156 * 157 * <a name="Lifecycle"></a> 158 * <h3>Implementing a Custom View</h3> 159 * 160 * <p> 161 * To implement a custom view, you will usually begin by providing overrides for 162 * some of the standard methods that the framework calls on all views. You do 163 * not need to override all of these methods. In fact, you can start by just 164 * overriding {@link #onDraw(android.graphics.Canvas)}. 165 * <table border="2" width="85%" align="center" cellpadding="5"> 166 * <thead> 167 * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> 168 * </thead> 169 * 170 * <tbody> 171 * <tr> 172 * <td rowspan="2">Creation</td> 173 * <td>Constructors</td> 174 * <td>There is a form of the constructor that are called when the view 175 * is created from code and a form that is called when the view is 176 * inflated from a layout file. The second form should parse and apply 177 * any attributes defined in the layout file. 178 * </td> 179 * </tr> 180 * <tr> 181 * <td><code>{@link #onFinishInflate()}</code></td> 182 * <td>Called after a view and all of its children has been inflated 183 * from XML.</td> 184 * </tr> 185 * 186 * <tr> 187 * <td rowspan="3">Layout</td> 188 * <td><code>{@link #onMeasure(int, int)}</code></td> 189 * <td>Called to determine the size requirements for this view and all 190 * of its children. 191 * </td> 192 * </tr> 193 * <tr> 194 * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> 195 * <td>Called when this view should assign a size and position to all 196 * of its children. 197 * </td> 198 * </tr> 199 * <tr> 200 * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> 201 * <td>Called when the size of this view has changed. 202 * </td> 203 * </tr> 204 * 205 * <tr> 206 * <td>Drawing</td> 207 * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> 208 * <td>Called when the view should render its content. 209 * </td> 210 * </tr> 211 * 212 * <tr> 213 * <td rowspan="4">Event processing</td> 214 * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> 215 * <td>Called when a new hardware key event occurs. 216 * </td> 217 * </tr> 218 * <tr> 219 * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> 220 * <td>Called when a hardware key up event occurs. 221 * </td> 222 * </tr> 223 * <tr> 224 * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> 225 * <td>Called when a trackball motion event occurs. 226 * </td> 227 * </tr> 228 * <tr> 229 * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> 230 * <td>Called when a touch screen motion event occurs. 231 * </td> 232 * </tr> 233 * 234 * <tr> 235 * <td rowspan="2">Focus</td> 236 * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> 237 * <td>Called when the view gains or loses focus. 238 * </td> 239 * </tr> 240 * 241 * <tr> 242 * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> 243 * <td>Called when the window containing the view gains or loses focus. 244 * </td> 245 * </tr> 246 * 247 * <tr> 248 * <td rowspan="3">Attaching</td> 249 * <td><code>{@link #onAttachedToWindow()}</code></td> 250 * <td>Called when the view is attached to a window. 251 * </td> 252 * </tr> 253 * 254 * <tr> 255 * <td><code>{@link #onDetachedFromWindow}</code></td> 256 * <td>Called when the view is detached from its window. 257 * </td> 258 * </tr> 259 * 260 * <tr> 261 * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> 262 * <td>Called when the visibility of the window containing the view 263 * has changed. 264 * </td> 265 * </tr> 266 * </tbody> 267 * 268 * </table> 269 * </p> 270 * 271 * <a name="IDs"></a> 272 * <h3>IDs</h3> 273 * Views may have an integer id associated with them. These ids are typically 274 * assigned in the layout XML files, and are used to find specific views within 275 * the view tree. A common pattern is to: 276 * <ul> 277 * <li>Define a Button in the layout file and assign it a unique ID. 278 * <pre> 279 * <Button 280 * android:id="@+id/my_button" 281 * android:layout_width="wrap_content" 282 * android:layout_height="wrap_content" 283 * android:text="@string/my_button_text"/> 284 * </pre></li> 285 * <li>From the onCreate method of an Activity, find the Button 286 * <pre class="prettyprint"> 287 * Button myButton = (Button) findViewById(R.id.my_button); 288 * </pre></li> 289 * </ul> 290 * <p> 291 * View IDs need not be unique throughout the tree, but it is good practice to 292 * ensure that they are at least unique within the part of the tree you are 293 * searching. 294 * </p> 295 * 296 * <a name="Position"></a> 297 * <h3>Position</h3> 298 * <p> 299 * The geometry of a view is that of a rectangle. A view has a location, 300 * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and 301 * two dimensions, expressed as a width and a height. The unit for location 302 * and dimensions is the pixel. 303 * </p> 304 * 305 * <p> 306 * It is possible to retrieve the location of a view by invoking the methods 307 * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, 308 * coordinate of the rectangle representing the view. The latter returns the 309 * top, or Y, coordinate of the rectangle representing the view. These methods 310 * both return the location of the view relative to its parent. For instance, 311 * when getLeft() returns 20, that means the view is located 20 pixels to the 312 * right of the left edge of its direct parent. 313 * </p> 314 * 315 * <p> 316 * In addition, several convenience methods are offered to avoid unnecessary 317 * computations, namely {@link #getRight()} and {@link #getBottom()}. 318 * These methods return the coordinates of the right and bottom edges of the 319 * rectangle representing the view. For instance, calling {@link #getRight()} 320 * is similar to the following computation: <code>getLeft() + getWidth()</code> 321 * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) 322 * </p> 323 * 324 * <a name="SizePaddingMargins"></a> 325 * <h3>Size, padding and margins</h3> 326 * <p> 327 * The size of a view is expressed with a width and a height. A view actually 328 * possess two pairs of width and height values. 329 * </p> 330 * 331 * <p> 332 * The first pair is known as <em>measured width</em> and 333 * <em>measured height</em>. These dimensions define how big a view wants to be 334 * within its parent (see <a href="#Layout">Layout</a> for more details.) The 335 * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} 336 * and {@link #getMeasuredHeight()}. 337 * </p> 338 * 339 * <p> 340 * The second pair is simply known as <em>width</em> and <em>height</em>, or 341 * sometimes <em>drawing width</em> and <em>drawing height</em>. These 342 * dimensions define the actual size of the view on screen, at drawing time and 343 * after layout. These values may, but do not have to, be different from the 344 * measured width and height. The width and height can be obtained by calling 345 * {@link #getWidth()} and {@link #getHeight()}. 346 * </p> 347 * 348 * <p> 349 * To measure its dimensions, a view takes into account its padding. The padding 350 * is expressed in pixels for the left, top, right and bottom parts of the view. 351 * Padding can be used to offset the content of the view by a specific amount of 352 * pixels. For instance, a left padding of 2 will push the view's content by 353 * 2 pixels to the right of the left edge. Padding can be set using the 354 * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} 355 * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, 356 * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, 357 * {@link #getPaddingEnd()}. 358 * </p> 359 * 360 * <p> 361 * Even though a view can define a padding, it does not provide any support for 362 * margins. However, view groups provide such a support. Refer to 363 * {@link android.view.ViewGroup} and 364 * {@link android.view.ViewGroup.MarginLayoutParams} for further information. 365 * </p> 366 * 367 * <a name="Layout"></a> 368 * <h3>Layout</h3> 369 * <p> 370 * Layout is a two pass process: a measure pass and a layout pass. The measuring 371 * pass is implemented in {@link #measure(int, int)} and is a top-down traversal 372 * of the view tree. Each view pushes dimension specifications down the tree 373 * during the recursion. At the end of the measure pass, every view has stored 374 * its measurements. The second pass happens in 375 * {@link #layout(int,int,int,int)} and is also top-down. During 376 * this pass each parent is responsible for positioning all of its children 377 * using the sizes computed in the measure pass. 378 * </p> 379 * 380 * <p> 381 * When a view's measure() method returns, its {@link #getMeasuredWidth()} and 382 * {@link #getMeasuredHeight()} values must be set, along with those for all of 383 * that view's descendants. A view's measured width and measured height values 384 * must respect the constraints imposed by the view's parents. This guarantees 385 * that at the end of the measure pass, all parents accept all of their 386 * children's measurements. A parent view may call measure() more than once on 387 * its children. For example, the parent may measure each child once with 388 * unspecified dimensions to find out how big they want to be, then call 389 * measure() on them again with actual numbers if the sum of all the children's 390 * unconstrained sizes is too big or too small. 391 * </p> 392 * 393 * <p> 394 * The measure pass uses two classes to communicate dimensions. The 395 * {@link MeasureSpec} class is used by views to tell their parents how they 396 * want to be measured and positioned. The base LayoutParams class just 397 * describes how big the view wants to be for both width and height. For each 398 * dimension, it can specify one of: 399 * <ul> 400 * <li> an exact number 401 * <li>MATCH_PARENT, which means the view wants to be as big as its parent 402 * (minus padding) 403 * <li> WRAP_CONTENT, which means that the view wants to be just big enough to 404 * enclose its content (plus padding). 405 * </ul> 406 * There are subclasses of LayoutParams for different subclasses of ViewGroup. 407 * For example, AbsoluteLayout has its own subclass of LayoutParams which adds 408 * an X and Y value. 409 * </p> 410 * 411 * <p> 412 * MeasureSpecs are used to push requirements down the tree from parent to 413 * child. A MeasureSpec can be in one of three modes: 414 * <ul> 415 * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension 416 * of a child view. For example, a LinearLayout may call measure() on its child 417 * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how 418 * tall the child view wants to be given a width of 240 pixels. 419 * <li>EXACTLY: This is used by the parent to impose an exact size on the 420 * child. The child must use this size, and guarantee that all of its 421 * descendants will fit within this size. 422 * <li>AT_MOST: This is used by the parent to impose a maximum size on the 423 * child. The child must gurantee that it and all of its descendants will fit 424 * within this size. 425 * </ul> 426 * </p> 427 * 428 * <p> 429 * To intiate a layout, call {@link #requestLayout}. This method is typically 430 * called by a view on itself when it believes that is can no longer fit within 431 * its current bounds. 432 * </p> 433 * 434 * <a name="Drawing"></a> 435 * <h3>Drawing</h3> 436 * <p> 437 * Drawing is handled by walking the tree and rendering each view that 438 * intersects the invalid region. Because the tree is traversed in-order, 439 * this means that parents will draw before (i.e., behind) their children, with 440 * siblings drawn in the order they appear in the tree. 441 * If you set a background drawable for a View, then the View will draw it for you 442 * before calling back to its <code>onDraw()</code> method. 443 * </p> 444 * 445 * <p> 446 * Note that the framework will not draw views that are not in the invalid region. 447 * </p> 448 * 449 * <p> 450 * To force a view to draw, call {@link #invalidate()}. 451 * </p> 452 * 453 * <a name="EventHandlingThreading"></a> 454 * <h3>Event Handling and Threading</h3> 455 * <p> 456 * The basic cycle of a view is as follows: 457 * <ol> 458 * <li>An event comes in and is dispatched to the appropriate view. The view 459 * handles the event and notifies any listeners.</li> 460 * <li>If in the course of processing the event, the view's bounds may need 461 * to be changed, the view will call {@link #requestLayout()}.</li> 462 * <li>Similarly, if in the course of processing the event the view's appearance 463 * may need to be changed, the view will call {@link #invalidate()}.</li> 464 * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, 465 * the framework will take care of measuring, laying out, and drawing the tree 466 * as appropriate.</li> 467 * </ol> 468 * </p> 469 * 470 * <p><em>Note: The entire view tree is single threaded. You must always be on 471 * the UI thread when calling any method on any view.</em> 472 * If you are doing work on other threads and want to update the state of a view 473 * from that thread, you should use a {@link Handler}. 474 * </p> 475 * 476 * <a name="FocusHandling"></a> 477 * <h3>Focus Handling</h3> 478 * <p> 479 * The framework will handle routine focus movement in response to user input. 480 * This includes changing the focus as views are removed or hidden, or as new 481 * views become available. Views indicate their willingness to take focus 482 * through the {@link #isFocusable} method. To change whether a view can take 483 * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) 484 * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} 485 * and can change this via {@link #setFocusableInTouchMode(boolean)}. 486 * </p> 487 * <p> 488 * Focus movement is based on an algorithm which finds the nearest neighbor in a 489 * given direction. In rare cases, the default algorithm may not match the 490 * intended behavior of the developer. In these situations, you can provide 491 * explicit overrides by using these XML attributes in the layout file: 492 * <pre> 493 * nextFocusDown 494 * nextFocusLeft 495 * nextFocusRight 496 * nextFocusUp 497 * </pre> 498 * </p> 499 * 500 * 501 * <p> 502 * To get a particular view to take focus, call {@link #requestFocus()}. 503 * </p> 504 * 505 * <a name="TouchMode"></a> 506 * <h3>Touch Mode</h3> 507 * <p> 508 * When a user is navigating a user interface via directional keys such as a D-pad, it is 509 * necessary to give focus to actionable items such as buttons so the user can see 510 * what will take input. If the device has touch capabilities, however, and the user 511 * begins interacting with the interface by touching it, it is no longer necessary to 512 * always highlight, or give focus to, a particular view. This motivates a mode 513 * for interaction named 'touch mode'. 514 * </p> 515 * <p> 516 * For a touch capable device, once the user touches the screen, the device 517 * will enter touch mode. From this point onward, only views for which 518 * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. 519 * Other views that are touchable, like buttons, will not take focus when touched; they will 520 * only fire the on click listeners. 521 * </p> 522 * <p> 523 * Any time a user hits a directional key, such as a D-pad direction, the view device will 524 * exit touch mode, and find a view to take focus, so that the user may resume interacting 525 * with the user interface without touching the screen again. 526 * </p> 527 * <p> 528 * The touch mode state is maintained across {@link android.app.Activity}s. Call 529 * {@link #isInTouchMode} to see whether the device is currently in touch mode. 530 * </p> 531 * 532 * <a name="Scrolling"></a> 533 * <h3>Scrolling</h3> 534 * <p> 535 * The framework provides basic support for views that wish to internally 536 * scroll their content. This includes keeping track of the X and Y scroll 537 * offset as well as mechanisms for drawing scrollbars. See 538 * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and 539 * {@link #awakenScrollBars()} for more details. 540 * </p> 541 * 542 * <a name="Tags"></a> 543 * <h3>Tags</h3> 544 * <p> 545 * Unlike IDs, tags are not used to identify views. Tags are essentially an 546 * extra piece of information that can be associated with a view. They are most 547 * often used as a convenience to store data related to views in the views 548 * themselves rather than by putting them in a separate structure. 549 * </p> 550 * 551 * <a name="Properties"></a> 552 * <h3>Properties</h3> 553 * <p> 554 * The View class exposes an {@link #ALPHA} property, as well as several transform-related 555 * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are 556 * available both in the {@link Property} form as well as in similarly-named setter/getter 557 * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can 558 * be used to set persistent state associated with these rendering-related properties on the view. 559 * The properties and methods can also be used in conjunction with 560 * {@link android.animation.Animator Animator}-based animations, described more in the 561 * <a href="#Animation">Animation</a> section. 562 * </p> 563 * 564 * <a name="Animation"></a> 565 * <h3>Animation</h3> 566 * <p> 567 * Starting with Android 3.0, the preferred way of animating views is to use the 568 * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based 569 * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and 570 * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 571 * {@link android.view.animation.Animation Animation}-based classes, which instead animate only 572 * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class 573 * makes animating these View properties particularly easy and efficient. 574 * </p> 575 * <p> 576 * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. 577 * You can attach an {@link Animation} object to a view using 578 * {@link #setAnimation(Animation)} or 579 * {@link #startAnimation(Animation)}. The animation can alter the scale, 580 * rotation, translation and alpha of a view over time. If the animation is 581 * attached to a view that has children, the animation will affect the entire 582 * subtree rooted by that node. When an animation is started, the framework will 583 * take care of redrawing the appropriate views until the animation completes. 584 * </p> 585 * 586 * <a name="Security"></a> 587 * <h3>Security</h3> 588 * <p> 589 * Sometimes it is essential that an application be able to verify that an action 590 * is being performed with the full knowledge and consent of the user, such as 591 * granting a permission request, making a purchase or clicking on an advertisement. 592 * Unfortunately, a malicious application could try to spoof the user into 593 * performing these actions, unaware, by concealing the intended purpose of the view. 594 * As a remedy, the framework offers a touch filtering mechanism that can be used to 595 * improve the security of views that provide access to sensitive functionality. 596 * </p><p> 597 * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the 598 * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework 599 * will discard touches that are received whenever the view's window is obscured by 600 * another visible window. As a result, the view will not receive touches whenever a 601 * toast, dialog or other window appears above the view's window. 602 * </p><p> 603 * For more fine-grained control over security, consider overriding the 604 * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own 605 * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. 606 * </p> 607 * 608 * @attr ref android.R.styleable#View_alpha 609 * @attr ref android.R.styleable#View_background 610 * @attr ref android.R.styleable#View_clickable 611 * @attr ref android.R.styleable#View_contentDescription 612 * @attr ref android.R.styleable#View_drawingCacheQuality 613 * @attr ref android.R.styleable#View_duplicateParentState 614 * @attr ref android.R.styleable#View_id 615 * @attr ref android.R.styleable#View_requiresFadingEdge 616 * @attr ref android.R.styleable#View_fadeScrollbars 617 * @attr ref android.R.styleable#View_fadingEdgeLength 618 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 619 * @attr ref android.R.styleable#View_fitsSystemWindows 620 * @attr ref android.R.styleable#View_isScrollContainer 621 * @attr ref android.R.styleable#View_focusable 622 * @attr ref android.R.styleable#View_focusableInTouchMode 623 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 624 * @attr ref android.R.styleable#View_keepScreenOn 625 * @attr ref android.R.styleable#View_layerType 626 * @attr ref android.R.styleable#View_longClickable 627 * @attr ref android.R.styleable#View_minHeight 628 * @attr ref android.R.styleable#View_minWidth 629 * @attr ref android.R.styleable#View_nextFocusDown 630 * @attr ref android.R.styleable#View_nextFocusLeft 631 * @attr ref android.R.styleable#View_nextFocusRight 632 * @attr ref android.R.styleable#View_nextFocusUp 633 * @attr ref android.R.styleable#View_onClick 634 * @attr ref android.R.styleable#View_padding 635 * @attr ref android.R.styleable#View_paddingBottom 636 * @attr ref android.R.styleable#View_paddingLeft 637 * @attr ref android.R.styleable#View_paddingRight 638 * @attr ref android.R.styleable#View_paddingTop 639 * @attr ref android.R.styleable#View_paddingStart 640 * @attr ref android.R.styleable#View_paddingEnd 641 * @attr ref android.R.styleable#View_saveEnabled 642 * @attr ref android.R.styleable#View_rotation 643 * @attr ref android.R.styleable#View_rotationX 644 * @attr ref android.R.styleable#View_rotationY 645 * @attr ref android.R.styleable#View_scaleX 646 * @attr ref android.R.styleable#View_scaleY 647 * @attr ref android.R.styleable#View_scrollX 648 * @attr ref android.R.styleable#View_scrollY 649 * @attr ref android.R.styleable#View_scrollbarSize 650 * @attr ref android.R.styleable#View_scrollbarStyle 651 * @attr ref android.R.styleable#View_scrollbars 652 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 653 * @attr ref android.R.styleable#View_scrollbarFadeDuration 654 * @attr ref android.R.styleable#View_scrollbarTrackHorizontal 655 * @attr ref android.R.styleable#View_scrollbarThumbHorizontal 656 * @attr ref android.R.styleable#View_scrollbarThumbVertical 657 * @attr ref android.R.styleable#View_scrollbarTrackVertical 658 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack 659 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack 660 * @attr ref android.R.styleable#View_soundEffectsEnabled 661 * @attr ref android.R.styleable#View_tag 662 * @attr ref android.R.styleable#View_textAlignment 663 * @attr ref android.R.styleable#View_transformPivotX 664 * @attr ref android.R.styleable#View_transformPivotY 665 * @attr ref android.R.styleable#View_translationX 666 * @attr ref android.R.styleable#View_translationY 667 * @attr ref android.R.styleable#View_visibility 668 * 669 * @see android.view.ViewGroup 670 */ 671public class View implements Drawable.Callback, KeyEvent.Callback, 672 AccessibilityEventSource { 673 private static final boolean DBG = false; 674 675 /** 676 * The logging tag used by this class with android.util.Log. 677 */ 678 protected static final String VIEW_LOG_TAG = "View"; 679 680 /** 681 * When set to true, apps will draw debugging information about their layouts. 682 * 683 * @hide 684 */ 685 public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; 686 687 /** 688 * Used to mark a View that has no ID. 689 */ 690 public static final int NO_ID = -1; 691 692 /** 693 * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when 694 * calling setFlags. 695 */ 696 private static final int NOT_FOCUSABLE = 0x00000000; 697 698 /** 699 * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling 700 * setFlags. 701 */ 702 private static final int FOCUSABLE = 0x00000001; 703 704 /** 705 * Mask for use with setFlags indicating bits used for focus. 706 */ 707 private static final int FOCUSABLE_MASK = 0x00000001; 708 709 /** 710 * This view will adjust its padding to fit sytem windows (e.g. status bar) 711 */ 712 private static final int FITS_SYSTEM_WINDOWS = 0x00000002; 713 714 /** 715 * This view is visible. 716 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 717 * android:visibility}. 718 */ 719 public static final int VISIBLE = 0x00000000; 720 721 /** 722 * This view is invisible, but it still takes up space for layout purposes. 723 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 724 * android:visibility}. 725 */ 726 public static final int INVISIBLE = 0x00000004; 727 728 /** 729 * This view is invisible, and it doesn't take any space for layout 730 * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 731 * android:visibility}. 732 */ 733 public static final int GONE = 0x00000008; 734 735 /** 736 * Mask for use with setFlags indicating bits used for visibility. 737 * {@hide} 738 */ 739 static final int VISIBILITY_MASK = 0x0000000C; 740 741 private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; 742 743 /** 744 * This view is enabled. Interpretation varies by subclass. 745 * Use with ENABLED_MASK when calling setFlags. 746 * {@hide} 747 */ 748 static final int ENABLED = 0x00000000; 749 750 /** 751 * This view is disabled. Interpretation varies by subclass. 752 * Use with ENABLED_MASK when calling setFlags. 753 * {@hide} 754 */ 755 static final int DISABLED = 0x00000020; 756 757 /** 758 * Mask for use with setFlags indicating bits used for indicating whether 759 * this view is enabled 760 * {@hide} 761 */ 762 static final int ENABLED_MASK = 0x00000020; 763 764 /** 765 * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be 766 * called and further optimizations will be performed. It is okay to have 767 * this flag set and a background. Use with DRAW_MASK when calling setFlags. 768 * {@hide} 769 */ 770 static final int WILL_NOT_DRAW = 0x00000080; 771 772 /** 773 * Mask for use with setFlags indicating bits used for indicating whether 774 * this view is will draw 775 * {@hide} 776 */ 777 static final int DRAW_MASK = 0x00000080; 778 779 /** 780 * <p>This view doesn't show scrollbars.</p> 781 * {@hide} 782 */ 783 static final int SCROLLBARS_NONE = 0x00000000; 784 785 /** 786 * <p>This view shows horizontal scrollbars.</p> 787 * {@hide} 788 */ 789 static final int SCROLLBARS_HORIZONTAL = 0x00000100; 790 791 /** 792 * <p>This view shows vertical scrollbars.</p> 793 * {@hide} 794 */ 795 static final int SCROLLBARS_VERTICAL = 0x00000200; 796 797 /** 798 * <p>Mask for use with setFlags indicating bits used for indicating which 799 * scrollbars are enabled.</p> 800 * {@hide} 801 */ 802 static final int SCROLLBARS_MASK = 0x00000300; 803 804 /** 805 * Indicates that the view should filter touches when its window is obscured. 806 * Refer to the class comments for more information about this security feature. 807 * {@hide} 808 */ 809 static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; 810 811 /** 812 * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate 813 * that they are optional and should be skipped if the window has 814 * requested system UI flags that ignore those insets for layout. 815 */ 816 static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; 817 818 /** 819 * <p>This view doesn't show fading edges.</p> 820 * {@hide} 821 */ 822 static final int FADING_EDGE_NONE = 0x00000000; 823 824 /** 825 * <p>This view shows horizontal fading edges.</p> 826 * {@hide} 827 */ 828 static final int FADING_EDGE_HORIZONTAL = 0x00001000; 829 830 /** 831 * <p>This view shows vertical fading edges.</p> 832 * {@hide} 833 */ 834 static final int FADING_EDGE_VERTICAL = 0x00002000; 835 836 /** 837 * <p>Mask for use with setFlags indicating bits used for indicating which 838 * fading edges are enabled.</p> 839 * {@hide} 840 */ 841 static final int FADING_EDGE_MASK = 0x00003000; 842 843 /** 844 * <p>Indicates this view can be clicked. When clickable, a View reacts 845 * to clicks by notifying the OnClickListener.<p> 846 * {@hide} 847 */ 848 static final int CLICKABLE = 0x00004000; 849 850 /** 851 * <p>Indicates this view is caching its drawing into a bitmap.</p> 852 * {@hide} 853 */ 854 static final int DRAWING_CACHE_ENABLED = 0x00008000; 855 856 /** 857 * <p>Indicates that no icicle should be saved for this view.<p> 858 * {@hide} 859 */ 860 static final int SAVE_DISABLED = 0x000010000; 861 862 /** 863 * <p>Mask for use with setFlags indicating bits used for the saveEnabled 864 * property.</p> 865 * {@hide} 866 */ 867 static final int SAVE_DISABLED_MASK = 0x000010000; 868 869 /** 870 * <p>Indicates that no drawing cache should ever be created for this view.<p> 871 * {@hide} 872 */ 873 static final int WILL_NOT_CACHE_DRAWING = 0x000020000; 874 875 /** 876 * <p>Indicates this view can take / keep focus when int touch mode.</p> 877 * {@hide} 878 */ 879 static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; 880 881 /** 882 * <p>Enables low quality mode for the drawing cache.</p> 883 */ 884 public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; 885 886 /** 887 * <p>Enables high quality mode for the drawing cache.</p> 888 */ 889 public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; 890 891 /** 892 * <p>Enables automatic quality mode for the drawing cache.</p> 893 */ 894 public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; 895 896 private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { 897 DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH 898 }; 899 900 /** 901 * <p>Mask for use with setFlags indicating bits used for the cache 902 * quality property.</p> 903 * {@hide} 904 */ 905 static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; 906 907 /** 908 * <p> 909 * Indicates this view can be long clicked. When long clickable, a View 910 * reacts to long clicks by notifying the OnLongClickListener or showing a 911 * context menu. 912 * </p> 913 * {@hide} 914 */ 915 static final int LONG_CLICKABLE = 0x00200000; 916 917 /** 918 * <p>Indicates that this view gets its drawable states from its direct parent 919 * and ignores its original internal states.</p> 920 * 921 * @hide 922 */ 923 static final int DUPLICATE_PARENT_STATE = 0x00400000; 924 925 /** 926 * The scrollbar style to display the scrollbars inside the content area, 927 * without increasing the padding. The scrollbars will be overlaid with 928 * translucency on the view's content. 929 */ 930 public static final int SCROLLBARS_INSIDE_OVERLAY = 0; 931 932 /** 933 * The scrollbar style to display the scrollbars inside the padded area, 934 * increasing the padding of the view. The scrollbars will not overlap the 935 * content area of the view. 936 */ 937 public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; 938 939 /** 940 * The scrollbar style to display the scrollbars at the edge of the view, 941 * without increasing the padding. The scrollbars will be overlaid with 942 * translucency. 943 */ 944 public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; 945 946 /** 947 * The scrollbar style to display the scrollbars at the edge of the view, 948 * increasing the padding of the view. The scrollbars will only overlap the 949 * background, if any. 950 */ 951 public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; 952 953 /** 954 * Mask to check if the scrollbar style is overlay or inset. 955 * {@hide} 956 */ 957 static final int SCROLLBARS_INSET_MASK = 0x01000000; 958 959 /** 960 * Mask to check if the scrollbar style is inside or outside. 961 * {@hide} 962 */ 963 static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; 964 965 /** 966 * Mask for scrollbar style. 967 * {@hide} 968 */ 969 static final int SCROLLBARS_STYLE_MASK = 0x03000000; 970 971 /** 972 * View flag indicating that the screen should remain on while the 973 * window containing this view is visible to the user. This effectively 974 * takes care of automatically setting the WindowManager's 975 * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. 976 */ 977 public static final int KEEP_SCREEN_ON = 0x04000000; 978 979 /** 980 * View flag indicating whether this view should have sound effects enabled 981 * for events such as clicking and touching. 982 */ 983 public static final int SOUND_EFFECTS_ENABLED = 0x08000000; 984 985 /** 986 * View flag indicating whether this view should have haptic feedback 987 * enabled for events such as long presses. 988 */ 989 public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; 990 991 /** 992 * <p>Indicates that the view hierarchy should stop saving state when 993 * it reaches this view. If state saving is initiated immediately at 994 * the view, it will be allowed. 995 * {@hide} 996 */ 997 static final int PARENT_SAVE_DISABLED = 0x20000000; 998 999 /** 1000 * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> 1001 * {@hide} 1002 */ 1003 static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; 1004 1005 /** 1006 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1007 * should add all focusable Views regardless if they are focusable in touch mode. 1008 */ 1009 public static final int FOCUSABLES_ALL = 0x00000000; 1010 1011 /** 1012 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1013 * should add only Views focusable in touch mode. 1014 */ 1015 public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; 1016 1017 /** 1018 * Use with {@link #focusSearch(int)}. Move focus to the previous selectable 1019 * item. 1020 */ 1021 public static final int FOCUS_BACKWARD = 0x00000001; 1022 1023 /** 1024 * Use with {@link #focusSearch(int)}. Move focus to the next selectable 1025 * item. 1026 */ 1027 public static final int FOCUS_FORWARD = 0x00000002; 1028 1029 /** 1030 * Use with {@link #focusSearch(int)}. Move focus to the left. 1031 */ 1032 public static final int FOCUS_LEFT = 0x00000011; 1033 1034 /** 1035 * Use with {@link #focusSearch(int)}. Move focus up. 1036 */ 1037 public static final int FOCUS_UP = 0x00000021; 1038 1039 /** 1040 * Use with {@link #focusSearch(int)}. Move focus to the right. 1041 */ 1042 public static final int FOCUS_RIGHT = 0x00000042; 1043 1044 /** 1045 * Use with {@link #focusSearch(int)}. Move focus down. 1046 */ 1047 public static final int FOCUS_DOWN = 0x00000082; 1048 1049 /** 1050 * Bits of {@link #getMeasuredWidthAndState()} and 1051 * {@link #getMeasuredWidthAndState()} that provide the actual measured size. 1052 */ 1053 public static final int MEASURED_SIZE_MASK = 0x00ffffff; 1054 1055 /** 1056 * Bits of {@link #getMeasuredWidthAndState()} and 1057 * {@link #getMeasuredWidthAndState()} that provide the additional state bits. 1058 */ 1059 public static final int MEASURED_STATE_MASK = 0xff000000; 1060 1061 /** 1062 * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits 1063 * for functions that combine both width and height into a single int, 1064 * such as {@link #getMeasuredState()} and the childState argument of 1065 * {@link #resolveSizeAndState(int, int, int)}. 1066 */ 1067 public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; 1068 1069 /** 1070 * Bit of {@link #getMeasuredWidthAndState()} and 1071 * {@link #getMeasuredWidthAndState()} that indicates the measured size 1072 * is smaller that the space the view would like to have. 1073 */ 1074 public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; 1075 1076 /** 1077 * Base View state sets 1078 */ 1079 // Singles 1080 /** 1081 * Indicates the view has no states set. States are used with 1082 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1083 * view depending on its state. 1084 * 1085 * @see android.graphics.drawable.Drawable 1086 * @see #getDrawableState() 1087 */ 1088 protected static final int[] EMPTY_STATE_SET; 1089 /** 1090 * Indicates the view is enabled. States are used with 1091 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1092 * view depending on its state. 1093 * 1094 * @see android.graphics.drawable.Drawable 1095 * @see #getDrawableState() 1096 */ 1097 protected static final int[] ENABLED_STATE_SET; 1098 /** 1099 * Indicates the view is focused. States are used with 1100 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1101 * view depending on its state. 1102 * 1103 * @see android.graphics.drawable.Drawable 1104 * @see #getDrawableState() 1105 */ 1106 protected static final int[] FOCUSED_STATE_SET; 1107 /** 1108 * Indicates the view is selected. States are used with 1109 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1110 * view depending on its state. 1111 * 1112 * @see android.graphics.drawable.Drawable 1113 * @see #getDrawableState() 1114 */ 1115 protected static final int[] SELECTED_STATE_SET; 1116 /** 1117 * Indicates the view is pressed. States are used with 1118 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1119 * view depending on its state. 1120 * 1121 * @see android.graphics.drawable.Drawable 1122 * @see #getDrawableState() 1123 * @hide 1124 */ 1125 protected static final int[] PRESSED_STATE_SET; 1126 /** 1127 * Indicates the view's window has focus. States are used with 1128 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1129 * view depending on its state. 1130 * 1131 * @see android.graphics.drawable.Drawable 1132 * @see #getDrawableState() 1133 */ 1134 protected static final int[] WINDOW_FOCUSED_STATE_SET; 1135 // Doubles 1136 /** 1137 * Indicates the view is enabled and has the focus. 1138 * 1139 * @see #ENABLED_STATE_SET 1140 * @see #FOCUSED_STATE_SET 1141 */ 1142 protected static final int[] ENABLED_FOCUSED_STATE_SET; 1143 /** 1144 * Indicates the view is enabled and selected. 1145 * 1146 * @see #ENABLED_STATE_SET 1147 * @see #SELECTED_STATE_SET 1148 */ 1149 protected static final int[] ENABLED_SELECTED_STATE_SET; 1150 /** 1151 * Indicates the view is enabled and that its window has focus. 1152 * 1153 * @see #ENABLED_STATE_SET 1154 * @see #WINDOW_FOCUSED_STATE_SET 1155 */ 1156 protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; 1157 /** 1158 * Indicates the view is focused and selected. 1159 * 1160 * @see #FOCUSED_STATE_SET 1161 * @see #SELECTED_STATE_SET 1162 */ 1163 protected static final int[] FOCUSED_SELECTED_STATE_SET; 1164 /** 1165 * Indicates the view has the focus and that its window has the focus. 1166 * 1167 * @see #FOCUSED_STATE_SET 1168 * @see #WINDOW_FOCUSED_STATE_SET 1169 */ 1170 protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; 1171 /** 1172 * Indicates the view is selected and that its window has the focus. 1173 * 1174 * @see #SELECTED_STATE_SET 1175 * @see #WINDOW_FOCUSED_STATE_SET 1176 */ 1177 protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; 1178 // Triples 1179 /** 1180 * Indicates the view is enabled, focused and selected. 1181 * 1182 * @see #ENABLED_STATE_SET 1183 * @see #FOCUSED_STATE_SET 1184 * @see #SELECTED_STATE_SET 1185 */ 1186 protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; 1187 /** 1188 * Indicates the view is enabled, focused and its window has the focus. 1189 * 1190 * @see #ENABLED_STATE_SET 1191 * @see #FOCUSED_STATE_SET 1192 * @see #WINDOW_FOCUSED_STATE_SET 1193 */ 1194 protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1195 /** 1196 * Indicates the view is enabled, selected and its window has the focus. 1197 * 1198 * @see #ENABLED_STATE_SET 1199 * @see #SELECTED_STATE_SET 1200 * @see #WINDOW_FOCUSED_STATE_SET 1201 */ 1202 protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1203 /** 1204 * Indicates the view is focused, selected and its window has the focus. 1205 * 1206 * @see #FOCUSED_STATE_SET 1207 * @see #SELECTED_STATE_SET 1208 * @see #WINDOW_FOCUSED_STATE_SET 1209 */ 1210 protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1211 /** 1212 * Indicates the view is enabled, focused, selected and its window 1213 * has the focus. 1214 * 1215 * @see #ENABLED_STATE_SET 1216 * @see #FOCUSED_STATE_SET 1217 * @see #SELECTED_STATE_SET 1218 * @see #WINDOW_FOCUSED_STATE_SET 1219 */ 1220 protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1221 /** 1222 * Indicates the view is pressed and its window has the focus. 1223 * 1224 * @see #PRESSED_STATE_SET 1225 * @see #WINDOW_FOCUSED_STATE_SET 1226 */ 1227 protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; 1228 /** 1229 * Indicates the view is pressed and selected. 1230 * 1231 * @see #PRESSED_STATE_SET 1232 * @see #SELECTED_STATE_SET 1233 */ 1234 protected static final int[] PRESSED_SELECTED_STATE_SET; 1235 /** 1236 * Indicates the view is pressed, selected and its window has the focus. 1237 * 1238 * @see #PRESSED_STATE_SET 1239 * @see #SELECTED_STATE_SET 1240 * @see #WINDOW_FOCUSED_STATE_SET 1241 */ 1242 protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1243 /** 1244 * Indicates the view is pressed and focused. 1245 * 1246 * @see #PRESSED_STATE_SET 1247 * @see #FOCUSED_STATE_SET 1248 */ 1249 protected static final int[] PRESSED_FOCUSED_STATE_SET; 1250 /** 1251 * Indicates the view is pressed, focused and its window has the focus. 1252 * 1253 * @see #PRESSED_STATE_SET 1254 * @see #FOCUSED_STATE_SET 1255 * @see #WINDOW_FOCUSED_STATE_SET 1256 */ 1257 protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1258 /** 1259 * Indicates the view is pressed, focused and selected. 1260 * 1261 * @see #PRESSED_STATE_SET 1262 * @see #SELECTED_STATE_SET 1263 * @see #FOCUSED_STATE_SET 1264 */ 1265 protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; 1266 /** 1267 * Indicates the view is pressed, focused, selected and its window has the focus. 1268 * 1269 * @see #PRESSED_STATE_SET 1270 * @see #FOCUSED_STATE_SET 1271 * @see #SELECTED_STATE_SET 1272 * @see #WINDOW_FOCUSED_STATE_SET 1273 */ 1274 protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1275 /** 1276 * Indicates the view is pressed and enabled. 1277 * 1278 * @see #PRESSED_STATE_SET 1279 * @see #ENABLED_STATE_SET 1280 */ 1281 protected static final int[] PRESSED_ENABLED_STATE_SET; 1282 /** 1283 * Indicates the view is pressed, enabled and its window has the focus. 1284 * 1285 * @see #PRESSED_STATE_SET 1286 * @see #ENABLED_STATE_SET 1287 * @see #WINDOW_FOCUSED_STATE_SET 1288 */ 1289 protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; 1290 /** 1291 * Indicates the view is pressed, enabled and selected. 1292 * 1293 * @see #PRESSED_STATE_SET 1294 * @see #ENABLED_STATE_SET 1295 * @see #SELECTED_STATE_SET 1296 */ 1297 protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; 1298 /** 1299 * Indicates the view is pressed, enabled, selected and its window has the 1300 * focus. 1301 * 1302 * @see #PRESSED_STATE_SET 1303 * @see #ENABLED_STATE_SET 1304 * @see #SELECTED_STATE_SET 1305 * @see #WINDOW_FOCUSED_STATE_SET 1306 */ 1307 protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1308 /** 1309 * Indicates the view is pressed, enabled and focused. 1310 * 1311 * @see #PRESSED_STATE_SET 1312 * @see #ENABLED_STATE_SET 1313 * @see #FOCUSED_STATE_SET 1314 */ 1315 protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; 1316 /** 1317 * Indicates the view is pressed, enabled, focused and its window has the 1318 * focus. 1319 * 1320 * @see #PRESSED_STATE_SET 1321 * @see #ENABLED_STATE_SET 1322 * @see #FOCUSED_STATE_SET 1323 * @see #WINDOW_FOCUSED_STATE_SET 1324 */ 1325 protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1326 /** 1327 * Indicates the view is pressed, enabled, focused and selected. 1328 * 1329 * @see #PRESSED_STATE_SET 1330 * @see #ENABLED_STATE_SET 1331 * @see #SELECTED_STATE_SET 1332 * @see #FOCUSED_STATE_SET 1333 */ 1334 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; 1335 /** 1336 * Indicates the view is pressed, enabled, focused, selected and its window 1337 * has the focus. 1338 * 1339 * @see #PRESSED_STATE_SET 1340 * @see #ENABLED_STATE_SET 1341 * @see #SELECTED_STATE_SET 1342 * @see #FOCUSED_STATE_SET 1343 * @see #WINDOW_FOCUSED_STATE_SET 1344 */ 1345 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1346 1347 /** 1348 * The order here is very important to {@link #getDrawableState()} 1349 */ 1350 private static final int[][] VIEW_STATE_SETS; 1351 1352 static final int VIEW_STATE_WINDOW_FOCUSED = 1; 1353 static final int VIEW_STATE_SELECTED = 1 << 1; 1354 static final int VIEW_STATE_FOCUSED = 1 << 2; 1355 static final int VIEW_STATE_ENABLED = 1 << 3; 1356 static final int VIEW_STATE_PRESSED = 1 << 4; 1357 static final int VIEW_STATE_ACTIVATED = 1 << 5; 1358 static final int VIEW_STATE_ACCELERATED = 1 << 6; 1359 static final int VIEW_STATE_HOVERED = 1 << 7; 1360 static final int VIEW_STATE_DRAG_CAN_ACCEPT = 1 << 8; 1361 static final int VIEW_STATE_DRAG_HOVERED = 1 << 9; 1362 1363 static final int[] VIEW_STATE_IDS = new int[] { 1364 R.attr.state_window_focused, VIEW_STATE_WINDOW_FOCUSED, 1365 R.attr.state_selected, VIEW_STATE_SELECTED, 1366 R.attr.state_focused, VIEW_STATE_FOCUSED, 1367 R.attr.state_enabled, VIEW_STATE_ENABLED, 1368 R.attr.state_pressed, VIEW_STATE_PRESSED, 1369 R.attr.state_activated, VIEW_STATE_ACTIVATED, 1370 R.attr.state_accelerated, VIEW_STATE_ACCELERATED, 1371 R.attr.state_hovered, VIEW_STATE_HOVERED, 1372 R.attr.state_drag_can_accept, VIEW_STATE_DRAG_CAN_ACCEPT, 1373 R.attr.state_drag_hovered, VIEW_STATE_DRAG_HOVERED 1374 }; 1375 1376 static { 1377 if ((VIEW_STATE_IDS.length/2) != R.styleable.ViewDrawableStates.length) { 1378 throw new IllegalStateException( 1379 "VIEW_STATE_IDs array length does not match ViewDrawableStates style array"); 1380 } 1381 int[] orderedIds = new int[VIEW_STATE_IDS.length]; 1382 for (int i = 0; i < R.styleable.ViewDrawableStates.length; i++) { 1383 int viewState = R.styleable.ViewDrawableStates[i]; 1384 for (int j = 0; j<VIEW_STATE_IDS.length; j += 2) { 1385 if (VIEW_STATE_IDS[j] == viewState) { 1386 orderedIds[i * 2] = viewState; 1387 orderedIds[i * 2 + 1] = VIEW_STATE_IDS[j + 1]; 1388 } 1389 } 1390 } 1391 final int NUM_BITS = VIEW_STATE_IDS.length / 2; 1392 VIEW_STATE_SETS = new int[1 << NUM_BITS][]; 1393 for (int i = 0; i < VIEW_STATE_SETS.length; i++) { 1394 int numBits = Integer.bitCount(i); 1395 int[] set = new int[numBits]; 1396 int pos = 0; 1397 for (int j = 0; j < orderedIds.length; j += 2) { 1398 if ((i & orderedIds[j+1]) != 0) { 1399 set[pos++] = orderedIds[j]; 1400 } 1401 } 1402 VIEW_STATE_SETS[i] = set; 1403 } 1404 1405 EMPTY_STATE_SET = VIEW_STATE_SETS[0]; 1406 WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_WINDOW_FOCUSED]; 1407 SELECTED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_SELECTED]; 1408 SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1409 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED]; 1410 FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_FOCUSED]; 1411 FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1412 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED]; 1413 FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1414 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED]; 1415 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1416 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1417 | VIEW_STATE_FOCUSED]; 1418 ENABLED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_ENABLED]; 1419 ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1420 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED]; 1421 ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1422 VIEW_STATE_SELECTED | VIEW_STATE_ENABLED]; 1423 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1424 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1425 | VIEW_STATE_ENABLED]; 1426 ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1427 VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED]; 1428 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1429 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1430 | VIEW_STATE_ENABLED]; 1431 ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1432 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1433 | VIEW_STATE_ENABLED]; 1434 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1435 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1436 | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED]; 1437 1438 PRESSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_PRESSED]; 1439 PRESSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1440 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_PRESSED]; 1441 PRESSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1442 VIEW_STATE_SELECTED | VIEW_STATE_PRESSED]; 1443 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1444 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1445 | VIEW_STATE_PRESSED]; 1446 PRESSED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1447 VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; 1448 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1449 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1450 | VIEW_STATE_PRESSED]; 1451 PRESSED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1452 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1453 | VIEW_STATE_PRESSED]; 1454 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1455 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1456 | VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; 1457 PRESSED_ENABLED_STATE_SET = VIEW_STATE_SETS[ 1458 VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1459 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1460 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED 1461 | VIEW_STATE_PRESSED]; 1462 PRESSED_ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1463 VIEW_STATE_SELECTED | VIEW_STATE_ENABLED 1464 | VIEW_STATE_PRESSED]; 1465 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1466 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1467 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1468 PRESSED_ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1469 VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED 1470 | VIEW_STATE_PRESSED]; 1471 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1472 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED 1473 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1474 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ 1475 VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED 1476 | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; 1477 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ 1478 VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED 1479 | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED 1480 | VIEW_STATE_PRESSED]; 1481 } 1482 1483 /** 1484 * Accessibility event types that are dispatched for text population. 1485 */ 1486 private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = 1487 AccessibilityEvent.TYPE_VIEW_CLICKED 1488 | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED 1489 | AccessibilityEvent.TYPE_VIEW_SELECTED 1490 | AccessibilityEvent.TYPE_VIEW_FOCUSED 1491 | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED 1492 | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER 1493 | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT 1494 | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED 1495 | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED 1496 | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED 1497 | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; 1498 1499 /** 1500 * Temporary Rect currently for use in setBackground(). This will probably 1501 * be extended in the future to hold our own class with more than just 1502 * a Rect. :) 1503 */ 1504 static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); 1505 1506 /** 1507 * Map used to store views' tags. 1508 */ 1509 private SparseArray<Object> mKeyedTags; 1510 1511 /** 1512 * The next available accessibility id. 1513 */ 1514 private static int sNextAccessibilityViewId; 1515 1516 /** 1517 * The animation currently associated with this view. 1518 * @hide 1519 */ 1520 protected Animation mCurrentAnimation = null; 1521 1522 /** 1523 * Width as measured during measure pass. 1524 * {@hide} 1525 */ 1526 @ViewDebug.ExportedProperty(category = "measurement") 1527 int mMeasuredWidth; 1528 1529 /** 1530 * Height as measured during measure pass. 1531 * {@hide} 1532 */ 1533 @ViewDebug.ExportedProperty(category = "measurement") 1534 int mMeasuredHeight; 1535 1536 /** 1537 * Flag to indicate that this view was marked INVALIDATED, or had its display list 1538 * invalidated, prior to the current drawing iteration. If true, the view must re-draw 1539 * its display list. This flag, used only when hw accelerated, allows us to clear the 1540 * flag while retaining this information until it's needed (at getDisplayList() time and 1541 * in drawChild(), when we decide to draw a view's children's display lists into our own). 1542 * 1543 * {@hide} 1544 */ 1545 boolean mRecreateDisplayList = false; 1546 1547 /** 1548 * The view's identifier. 1549 * {@hide} 1550 * 1551 * @see #setId(int) 1552 * @see #getId() 1553 */ 1554 @ViewDebug.ExportedProperty(resolveId = true) 1555 int mID = NO_ID; 1556 1557 /** 1558 * The stable ID of this view for accessibility purposes. 1559 */ 1560 int mAccessibilityViewId = NO_ID; 1561 1562 /** 1563 * @hide 1564 */ 1565 private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 1566 1567 /** 1568 * The view's tag. 1569 * {@hide} 1570 * 1571 * @see #setTag(Object) 1572 * @see #getTag() 1573 */ 1574 protected Object mTag; 1575 1576 // for mPrivateFlags: 1577 /** {@hide} */ 1578 static final int PFLAG_WANTS_FOCUS = 0x00000001; 1579 /** {@hide} */ 1580 static final int PFLAG_FOCUSED = 0x00000002; 1581 /** {@hide} */ 1582 static final int PFLAG_SELECTED = 0x00000004; 1583 /** {@hide} */ 1584 static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; 1585 /** {@hide} */ 1586 static final int PFLAG_HAS_BOUNDS = 0x00000010; 1587 /** {@hide} */ 1588 static final int PFLAG_DRAWN = 0x00000020; 1589 /** 1590 * When this flag is set, this view is running an animation on behalf of its 1591 * children and should therefore not cancel invalidate requests, even if they 1592 * lie outside of this view's bounds. 1593 * 1594 * {@hide} 1595 */ 1596 static final int PFLAG_DRAW_ANIMATION = 0x00000040; 1597 /** {@hide} */ 1598 static final int PFLAG_SKIP_DRAW = 0x00000080; 1599 /** {@hide} */ 1600 static final int PFLAG_ONLY_DRAWS_BACKGROUND = 0x00000100; 1601 /** {@hide} */ 1602 static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; 1603 /** {@hide} */ 1604 static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; 1605 /** {@hide} */ 1606 static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; 1607 /** {@hide} */ 1608 static final int PFLAG_FORCE_LAYOUT = 0x00001000; 1609 /** {@hide} */ 1610 static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; 1611 1612 private static final int PFLAG_PRESSED = 0x00004000; 1613 1614 /** {@hide} */ 1615 static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; 1616 /** 1617 * Flag used to indicate that this view should be drawn once more (and only once 1618 * more) after its animation has completed. 1619 * {@hide} 1620 */ 1621 static final int PFLAG_ANIMATION_STARTED = 0x00010000; 1622 1623 private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; 1624 1625 /** 1626 * Indicates that the View returned true when onSetAlpha() was called and that 1627 * the alpha must be restored. 1628 * {@hide} 1629 */ 1630 static final int PFLAG_ALPHA_SET = 0x00040000; 1631 1632 /** 1633 * Set by {@link #setScrollContainer(boolean)}. 1634 */ 1635 static final int PFLAG_SCROLL_CONTAINER = 0x00080000; 1636 1637 /** 1638 * Set by {@link #setScrollContainer(boolean)}. 1639 */ 1640 static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; 1641 1642 /** 1643 * View flag indicating whether this view was invalidated (fully or partially.) 1644 * 1645 * @hide 1646 */ 1647 static final int PFLAG_DIRTY = 0x00200000; 1648 1649 /** 1650 * View flag indicating whether this view was invalidated by an opaque 1651 * invalidate request. 1652 * 1653 * @hide 1654 */ 1655 static final int PFLAG_DIRTY_OPAQUE = 0x00400000; 1656 1657 /** 1658 * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. 1659 * 1660 * @hide 1661 */ 1662 static final int PFLAG_DIRTY_MASK = 0x00600000; 1663 1664 /** 1665 * Indicates whether the background is opaque. 1666 * 1667 * @hide 1668 */ 1669 static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; 1670 1671 /** 1672 * Indicates whether the scrollbars are opaque. 1673 * 1674 * @hide 1675 */ 1676 static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; 1677 1678 /** 1679 * Indicates whether the view is opaque. 1680 * 1681 * @hide 1682 */ 1683 static final int PFLAG_OPAQUE_MASK = 0x01800000; 1684 1685 /** 1686 * Indicates a prepressed state; 1687 * the short time between ACTION_DOWN and recognizing 1688 * a 'real' press. Prepressed is used to recognize quick taps 1689 * even when they are shorter than ViewConfiguration.getTapTimeout(). 1690 * 1691 * @hide 1692 */ 1693 private static final int PFLAG_PREPRESSED = 0x02000000; 1694 1695 /** 1696 * Indicates whether the view is temporarily detached. 1697 * 1698 * @hide 1699 */ 1700 static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; 1701 1702 /** 1703 * Indicates that we should awaken scroll bars once attached 1704 * 1705 * @hide 1706 */ 1707 private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; 1708 1709 /** 1710 * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. 1711 * @hide 1712 */ 1713 private static final int PFLAG_HOVERED = 0x10000000; 1714 1715 /** 1716 * Indicates that pivotX or pivotY were explicitly set and we should not assume the center 1717 * for transform operations 1718 * 1719 * @hide 1720 */ 1721 private static final int PFLAG_PIVOT_EXPLICITLY_SET = 0x20000000; 1722 1723 /** {@hide} */ 1724 static final int PFLAG_ACTIVATED = 0x40000000; 1725 1726 /** 1727 * Indicates that this view was specifically invalidated, not just dirtied because some 1728 * child view was invalidated. The flag is used to determine when we need to recreate 1729 * a view's display list (as opposed to just returning a reference to its existing 1730 * display list). 1731 * 1732 * @hide 1733 */ 1734 static final int PFLAG_INVALIDATED = 0x80000000; 1735 1736 /** 1737 * Masks for mPrivateFlags2, as generated by dumpFlags(): 1738 * 1739 * -------|-------|-------|-------| 1740 * PFLAG2_TEXT_ALIGNMENT_FLAGS[0] 1741 * PFLAG2_TEXT_DIRECTION_FLAGS[0] 1742 * 1 PFLAG2_DRAG_CAN_ACCEPT 1743 * 1 PFLAG2_DRAG_HOVERED 1744 * 1 PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT 1745 * 11 PFLAG2_TEXT_DIRECTION_MASK_SHIFT 1746 * 1 1 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT 1747 * 11 PFLAG2_LAYOUT_DIRECTION_MASK 1748 * 11 1 PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 1749 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 1750 * 1 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT 1751 * 1 1 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT 1752 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED 1753 * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 1754 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] 1755 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] 1756 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] 1757 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] 1758 * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] 1759 * 111 PFLAG2_TEXT_DIRECTION_MASK 1760 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED 1761 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT 1762 * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK 1763 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] 1764 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] 1765 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] 1766 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] 1767 * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] 1768 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] 1769 * 111 PFLAG2_TEXT_ALIGNMENT_MASK 1770 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED 1771 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT 1772 * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK 1773 * 11 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK 1774 * 1 PFLAG2_HAS_TRANSIENT_STATE 1775 * 1 PFLAG2_ACCESSIBILITY_FOCUSED 1776 * 1 PFLAG2_ACCESSIBILITY_STATE_CHANGED 1777 * 1 PFLAG2_VIEW_QUICK_REJECTED 1778 * 1 PFLAG2_PADDING_RESOLVED 1779 * -------|-------|-------|-------| 1780 */ 1781 1782 /** 1783 * Indicates that this view has reported that it can accept the current drag's content. 1784 * Cleared when the drag operation concludes. 1785 * @hide 1786 */ 1787 static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; 1788 1789 /** 1790 * Indicates that this view is currently directly under the drag location in a 1791 * drag-and-drop operation involving content that it can accept. Cleared when 1792 * the drag exits the view, or when the drag operation concludes. 1793 * @hide 1794 */ 1795 static final int PFLAG2_DRAG_HOVERED = 0x00000002; 1796 1797 /** 1798 * Horizontal layout direction of this view is from Left to Right. 1799 * Use with {@link #setLayoutDirection}. 1800 */ 1801 public static final int LAYOUT_DIRECTION_LTR = 0; 1802 1803 /** 1804 * Horizontal layout direction of this view is from Right to Left. 1805 * Use with {@link #setLayoutDirection}. 1806 */ 1807 public static final int LAYOUT_DIRECTION_RTL = 1; 1808 1809 /** 1810 * Horizontal layout direction of this view is inherited from its parent. 1811 * Use with {@link #setLayoutDirection}. 1812 */ 1813 public static final int LAYOUT_DIRECTION_INHERIT = 2; 1814 1815 /** 1816 * Horizontal layout direction of this view is from deduced from the default language 1817 * script for the locale. Use with {@link #setLayoutDirection}. 1818 */ 1819 public static final int LAYOUT_DIRECTION_LOCALE = 3; 1820 1821 /** 1822 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 1823 * @hide 1824 */ 1825 static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; 1826 1827 /** 1828 * Mask for use with private flags indicating bits used for horizontal layout direction. 1829 * @hide 1830 */ 1831 static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1832 1833 /** 1834 * Indicates whether the view horizontal layout direction has been resolved and drawn to the 1835 * right-to-left direction. 1836 * @hide 1837 */ 1838 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1839 1840 /** 1841 * Indicates whether the view horizontal layout direction has been resolved. 1842 * @hide 1843 */ 1844 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1845 1846 /** 1847 * Mask for use with private flags indicating bits used for resolved horizontal layout direction. 1848 * @hide 1849 */ 1850 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C 1851 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1852 1853 /* 1854 * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct 1855 * flag value. 1856 * @hide 1857 */ 1858 private static final int[] LAYOUT_DIRECTION_FLAGS = { 1859 LAYOUT_DIRECTION_LTR, 1860 LAYOUT_DIRECTION_RTL, 1861 LAYOUT_DIRECTION_INHERIT, 1862 LAYOUT_DIRECTION_LOCALE 1863 }; 1864 1865 /** 1866 * Default horizontal layout direction. 1867 * @hide 1868 */ 1869 private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; 1870 1871 /** 1872 * Indicates that the view is tracking some sort of transient state 1873 * that the app should not need to be aware of, but that the framework 1874 * should take special care to preserve. 1875 * 1876 * @hide 1877 */ 1878 static final int PFLAG2_HAS_TRANSIENT_STATE = 0x1 << 22; 1879 1880 /** 1881 * Text direction is inherited thru {@link ViewGroup} 1882 */ 1883 public static final int TEXT_DIRECTION_INHERIT = 0; 1884 1885 /** 1886 * Text direction is using "first strong algorithm". The first strong directional character 1887 * determines the paragraph direction. If there is no strong directional character, the 1888 * paragraph direction is the view's resolved layout direction. 1889 */ 1890 public static final int TEXT_DIRECTION_FIRST_STRONG = 1; 1891 1892 /** 1893 * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains 1894 * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. 1895 * If there are neither, the paragraph direction is the view's resolved layout direction. 1896 */ 1897 public static final int TEXT_DIRECTION_ANY_RTL = 2; 1898 1899 /** 1900 * Text direction is forced to LTR. 1901 */ 1902 public static final int TEXT_DIRECTION_LTR = 3; 1903 1904 /** 1905 * Text direction is forced to RTL. 1906 */ 1907 public static final int TEXT_DIRECTION_RTL = 4; 1908 1909 /** 1910 * Text direction is coming from the system Locale. 1911 */ 1912 public static final int TEXT_DIRECTION_LOCALE = 5; 1913 1914 /** 1915 * Default text direction is inherited 1916 */ 1917 public static int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; 1918 1919 /** 1920 * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) 1921 * @hide 1922 */ 1923 static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; 1924 1925 /** 1926 * Mask for use with private flags indicating bits used for text direction. 1927 * @hide 1928 */ 1929 static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 1930 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 1931 1932 /** 1933 * Array of text direction flags for mapping attribute "textDirection" to correct 1934 * flag value. 1935 * @hide 1936 */ 1937 private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { 1938 TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 1939 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 1940 TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 1941 TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 1942 TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 1943 TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT 1944 }; 1945 1946 /** 1947 * Indicates whether the view text direction has been resolved. 1948 * @hide 1949 */ 1950 static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 1951 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 1952 1953 /** 1954 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 1955 * @hide 1956 */ 1957 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; 1958 1959 /** 1960 * Mask for use with private flags indicating bits used for resolved text direction. 1961 * @hide 1962 */ 1963 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 1964 << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 1965 1966 /** 1967 * Indicates whether the view text direction has been resolved to the "first strong" heuristic. 1968 * @hide 1969 */ 1970 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = 1971 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 1972 1973 /* 1974 * Default text alignment. The text alignment of this View is inherited from its parent. 1975 * Use with {@link #setTextAlignment(int)} 1976 */ 1977 public static final int TEXT_ALIGNMENT_INHERIT = 0; 1978 1979 /** 1980 * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, 1981 * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph’s text direction. 1982 * 1983 * Use with {@link #setTextAlignment(int)} 1984 */ 1985 public static final int TEXT_ALIGNMENT_GRAVITY = 1; 1986 1987 /** 1988 * Align to the start of the paragraph, e.g. ALIGN_NORMAL. 1989 * 1990 * Use with {@link #setTextAlignment(int)} 1991 */ 1992 public static final int TEXT_ALIGNMENT_TEXT_START = 2; 1993 1994 /** 1995 * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. 1996 * 1997 * Use with {@link #setTextAlignment(int)} 1998 */ 1999 public static final int TEXT_ALIGNMENT_TEXT_END = 3; 2000 2001 /** 2002 * Center the paragraph, e.g. ALIGN_CENTER. 2003 * 2004 * Use with {@link #setTextAlignment(int)} 2005 */ 2006 public static final int TEXT_ALIGNMENT_CENTER = 4; 2007 2008 /** 2009 * Align to the start of the view, which is ALIGN_LEFT if the view’s resolved 2010 * layoutDirection is LTR, and ALIGN_RIGHT otherwise. 2011 * 2012 * Use with {@link #setTextAlignment(int)} 2013 */ 2014 public static final int TEXT_ALIGNMENT_VIEW_START = 5; 2015 2016 /** 2017 * Align to the end of the view, which is ALIGN_RIGHT if the view’s resolved 2018 * layoutDirection is LTR, and ALIGN_LEFT otherwise. 2019 * 2020 * Use with {@link #setTextAlignment(int)} 2021 */ 2022 public static final int TEXT_ALIGNMENT_VIEW_END = 6; 2023 2024 /** 2025 * Default text alignment is inherited 2026 */ 2027 public static int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2028 2029 /** 2030 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2031 * @hide 2032 */ 2033 static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; 2034 2035 /** 2036 * Mask for use with private flags indicating bits used for text alignment. 2037 * @hide 2038 */ 2039 static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2040 2041 /** 2042 * Array of text direction flags for mapping attribute "textAlignment" to correct 2043 * flag value. 2044 * @hide 2045 */ 2046 private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { 2047 TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2048 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2049 TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2050 TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2051 TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2052 TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2053 TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 2054 }; 2055 2056 /** 2057 * Indicates whether the view text alignment has been resolved. 2058 * @hide 2059 */ 2060 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2061 2062 /** 2063 * Bit shift to get the resolved text alignment. 2064 * @hide 2065 */ 2066 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; 2067 2068 /** 2069 * Mask for use with private flags indicating bits used for text alignment. 2070 * @hide 2071 */ 2072 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 2073 << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2074 2075 /** 2076 * Indicates whether if the view text alignment has been resolved to gravity 2077 */ 2078 private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = 2079 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2080 2081 // Accessiblity constants for mPrivateFlags2 2082 2083 /** 2084 * Shift for the bits in {@link #mPrivateFlags2} related to the 2085 * "importantForAccessibility" attribute. 2086 */ 2087 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; 2088 2089 /** 2090 * Automatically determine whether a view is important for accessibility. 2091 */ 2092 public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; 2093 2094 /** 2095 * The view is important for accessibility. 2096 */ 2097 public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; 2098 2099 /** 2100 * The view is not important for accessibility. 2101 */ 2102 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; 2103 2104 /** 2105 * The default whether the view is important for accessibility. 2106 */ 2107 static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; 2108 2109 /** 2110 * Mask for obtainig the bits which specify how to determine 2111 * whether a view is important for accessibility. 2112 */ 2113 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO 2114 | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO) 2115 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2116 2117 /** 2118 * Flag indicating whether a view has accessibility focus. 2119 */ 2120 static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x00000040 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2121 2122 /** 2123 * Flag indicating whether a view state for accessibility has changed. 2124 */ 2125 static final int PFLAG2_ACCESSIBILITY_STATE_CHANGED = 0x00000080 2126 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2127 2128 /** 2129 * Flag indicating whether a view failed the quickReject() check in draw(). This condition 2130 * is used to check whether later changes to the view's transform should invalidate the 2131 * view to force the quickReject test to run again. 2132 */ 2133 static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; 2134 2135 /** 2136 * Flag indicating that start/end padding has been resolved into left/right padding 2137 * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} 2138 * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved 2139 * during measurement. In some special cases this is required such as when an adapter-based 2140 * view measures prospective children without attaching them to a window. 2141 */ 2142 static final int PFLAG2_PADDING_RESOLVED = 0x20000000; 2143 2144 /** 2145 * Flag indicating that the start/end drawables has been resolved into left/right ones. 2146 */ 2147 static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; 2148 2149 /** 2150 * Group of bits indicating that RTL properties resolution is done. 2151 */ 2152 static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | 2153 PFLAG2_TEXT_DIRECTION_RESOLVED | 2154 PFLAG2_TEXT_ALIGNMENT_RESOLVED | 2155 PFLAG2_PADDING_RESOLVED | 2156 PFLAG2_DRAWABLE_RESOLVED; 2157 2158 // There are a couple of flags left in mPrivateFlags2 2159 2160 /* End of masks for mPrivateFlags2 */ 2161 2162 /* Masks for mPrivateFlags3 */ 2163 2164 /** 2165 * Flag indicating that view has a transform animation set on it. This is used to track whether 2166 * an animation is cleared between successive frames, in order to tell the associated 2167 * DisplayList to clear its animation matrix. 2168 */ 2169 static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; 2170 2171 /** 2172 * Flag indicating that view has an alpha animation set on it. This is used to track whether an 2173 * animation is cleared between successive frames, in order to tell the associated 2174 * DisplayList to restore its alpha value. 2175 */ 2176 static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; 2177 2178 2179 /* End of masks for mPrivateFlags3 */ 2180 2181 static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; 2182 2183 /** 2184 * Always allow a user to over-scroll this view, provided it is a 2185 * view that can scroll. 2186 * 2187 * @see #getOverScrollMode() 2188 * @see #setOverScrollMode(int) 2189 */ 2190 public static final int OVER_SCROLL_ALWAYS = 0; 2191 2192 /** 2193 * Allow a user to over-scroll this view only if the content is large 2194 * enough to meaningfully scroll, provided it is a view that can scroll. 2195 * 2196 * @see #getOverScrollMode() 2197 * @see #setOverScrollMode(int) 2198 */ 2199 public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; 2200 2201 /** 2202 * Never allow a user to over-scroll this view. 2203 * 2204 * @see #getOverScrollMode() 2205 * @see #setOverScrollMode(int) 2206 */ 2207 public static final int OVER_SCROLL_NEVER = 2; 2208 2209 /** 2210 * Special constant for {@link #setSystemUiVisibility(int)}: View has 2211 * requested the system UI (status bar) to be visible (the default). 2212 * 2213 * @see #setSystemUiVisibility(int) 2214 */ 2215 public static final int SYSTEM_UI_FLAG_VISIBLE = 0; 2216 2217 /** 2218 * Flag for {@link #setSystemUiVisibility(int)}: View has requested the 2219 * system UI to enter an unobtrusive "low profile" mode. 2220 * 2221 * <p>This is for use in games, book readers, video players, or any other 2222 * "immersive" application where the usual system chrome is deemed too distracting. 2223 * 2224 * <p>In low profile mode, the status bar and/or navigation icons may dim. 2225 * 2226 * @see #setSystemUiVisibility(int) 2227 */ 2228 public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; 2229 2230 /** 2231 * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the 2232 * system navigation be temporarily hidden. 2233 * 2234 * <p>This is an even less obtrusive state than that called for by 2235 * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls 2236 * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause 2237 * those to disappear. This is useful (in conjunction with the 2238 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and 2239 * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} 2240 * window flags) for displaying content using every last pixel on the display. 2241 * 2242 * <p>There is a limitation: because navigation controls are so important, the least user 2243 * interaction will cause them to reappear immediately. When this happens, both 2244 * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, 2245 * so that both elements reappear at the same time. 2246 * 2247 * @see #setSystemUiVisibility(int) 2248 */ 2249 public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; 2250 2251 /** 2252 * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go 2253 * into the normal fullscreen mode so that its content can take over the screen 2254 * while still allowing the user to interact with the application. 2255 * 2256 * <p>This has the same visual effect as 2257 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN 2258 * WindowManager.LayoutParams.FLAG_FULLSCREEN}, 2259 * meaning that non-critical screen decorations (such as the status bar) will be 2260 * hidden while the user is in the View's window, focusing the experience on 2261 * that content. Unlike the window flag, if you are using ActionBar in 2262 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2263 * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also 2264 * hide the action bar. 2265 * 2266 * <p>This approach to going fullscreen is best used over the window flag when 2267 * it is a transient state -- that is, the application does this at certain 2268 * points in its user interaction where it wants to allow the user to focus 2269 * on content, but not as a continuous state. For situations where the application 2270 * would like to simply stay full screen the entire time (such as a game that 2271 * wants to take over the screen), the 2272 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} 2273 * is usually a better approach. The state set here will be removed by the system 2274 * in various situations (such as the user moving to another application) like 2275 * the other system UI states. 2276 * 2277 * <p>When using this flag, the application should provide some easy facility 2278 * for the user to go out of it. A common example would be in an e-book 2279 * reader, where tapping on the screen brings back whatever screen and UI 2280 * decorations that had been hidden while the user was immersed in reading 2281 * the book. 2282 * 2283 * @see #setSystemUiVisibility(int) 2284 */ 2285 public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; 2286 2287 /** 2288 * Flag for {@link #setSystemUiVisibility(int)}: When using other layout 2289 * flags, we would like a stable view of the content insets given to 2290 * {@link #fitSystemWindows(Rect)}. This means that the insets seen there 2291 * will always represent the worst case that the application can expect 2292 * as a continuous state. In the stock Android UI this is the space for 2293 * the system bar, nav bar, and status bar, but not more transient elements 2294 * such as an input method. 2295 * 2296 * The stable layout your UI sees is based on the system UI modes you can 2297 * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 2298 * then you will get a stable layout for changes of the 2299 * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify 2300 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and 2301 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition 2302 * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} 2303 * with a stable layout. (Note that you should avoid using 2304 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) 2305 * 2306 * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} 2307 * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), 2308 * then a hidden status bar will be considered a "stable" state for purposes 2309 * here. This allows your UI to continually hide the status bar, while still 2310 * using the system UI flags to hide the action bar while still retaining 2311 * a stable layout. Note that changing the window fullscreen flag will never 2312 * provide a stable layout for a clean transition. 2313 * 2314 * <p>If you are using ActionBar in 2315 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2316 * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the 2317 * insets it adds to those given to the application. 2318 */ 2319 public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; 2320 2321 /** 2322 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2323 * to be layed out as if it has requested 2324 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This 2325 * allows it to avoid artifacts when switching in and out of that mode, at 2326 * the expense that some of its user interface may be covered by screen 2327 * decorations when they are shown. You can perform layout of your inner 2328 * UI elements to account for the navagation system UI through the 2329 * {@link #fitSystemWindows(Rect)} method. 2330 */ 2331 public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; 2332 2333 /** 2334 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2335 * to be layed out as if it has requested 2336 * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This 2337 * allows it to avoid artifacts when switching in and out of that mode, at 2338 * the expense that some of its user interface may be covered by screen 2339 * decorations when they are shown. You can perform layout of your inner 2340 * UI elements to account for non-fullscreen system UI through the 2341 * {@link #fitSystemWindows(Rect)} method. 2342 */ 2343 public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; 2344 2345 /** 2346 * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. 2347 */ 2348 public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; 2349 2350 /** 2351 * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. 2352 */ 2353 public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; 2354 2355 /** 2356 * @hide 2357 * 2358 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2359 * out of the public fields to keep the undefined bits out of the developer's way. 2360 * 2361 * Flag to make the status bar not expandable. Unless you also 2362 * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. 2363 */ 2364 public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; 2365 2366 /** 2367 * @hide 2368 * 2369 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2370 * out of the public fields to keep the undefined bits out of the developer's way. 2371 * 2372 * Flag to hide notification icons and scrolling ticker text. 2373 */ 2374 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; 2375 2376 /** 2377 * @hide 2378 * 2379 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2380 * out of the public fields to keep the undefined bits out of the developer's way. 2381 * 2382 * Flag to disable incoming notification alerts. This will not block 2383 * icons, but it will block sound, vibrating and other visual or aural notifications. 2384 */ 2385 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; 2386 2387 /** 2388 * @hide 2389 * 2390 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2391 * out of the public fields to keep the undefined bits out of the developer's way. 2392 * 2393 * Flag to hide only the scrolling ticker. Note that 2394 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies 2395 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. 2396 */ 2397 public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; 2398 2399 /** 2400 * @hide 2401 * 2402 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2403 * out of the public fields to keep the undefined bits out of the developer's way. 2404 * 2405 * Flag to hide the center system info area. 2406 */ 2407 public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; 2408 2409 /** 2410 * @hide 2411 * 2412 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2413 * out of the public fields to keep the undefined bits out of the developer's way. 2414 * 2415 * Flag to hide only the home button. Don't use this 2416 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2417 */ 2418 public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; 2419 2420 /** 2421 * @hide 2422 * 2423 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2424 * out of the public fields to keep the undefined bits out of the developer's way. 2425 * 2426 * Flag to hide only the back button. Don't use this 2427 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2428 */ 2429 public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; 2430 2431 /** 2432 * @hide 2433 * 2434 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2435 * out of the public fields to keep the undefined bits out of the developer's way. 2436 * 2437 * Flag to hide only the clock. You might use this if your activity has 2438 * its own clock making the status bar's clock redundant. 2439 */ 2440 public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; 2441 2442 /** 2443 * @hide 2444 * 2445 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2446 * out of the public fields to keep the undefined bits out of the developer's way. 2447 * 2448 * Flag to hide only the recent apps button. Don't use this 2449 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2450 */ 2451 public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; 2452 2453 /** 2454 * @hide 2455 */ 2456 public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x0000FFFF; 2457 2458 /** 2459 * These are the system UI flags that can be cleared by events outside 2460 * of an application. Currently this is just the ability to tap on the 2461 * screen while hiding the navigation bar to have it return. 2462 * @hide 2463 */ 2464 public static final int SYSTEM_UI_CLEARABLE_FLAGS = 2465 SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION 2466 | SYSTEM_UI_FLAG_FULLSCREEN; 2467 2468 /** 2469 * Flags that can impact the layout in relation to system UI. 2470 */ 2471 public static final int SYSTEM_UI_LAYOUT_FLAGS = 2472 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 2473 | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 2474 2475 /** 2476 * Find views that render the specified text. 2477 * 2478 * @see #findViewsWithText(ArrayList, CharSequence, int) 2479 */ 2480 public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; 2481 2482 /** 2483 * Find find views that contain the specified content description. 2484 * 2485 * @see #findViewsWithText(ArrayList, CharSequence, int) 2486 */ 2487 public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; 2488 2489 /** 2490 * Find views that contain {@link AccessibilityNodeProvider}. Such 2491 * a View is a root of virtual view hierarchy and may contain the searched 2492 * text. If this flag is set Views with providers are automatically 2493 * added and it is a responsibility of the client to call the APIs of 2494 * the provider to determine whether the virtual tree rooted at this View 2495 * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s 2496 * represeting the virtual views with this text. 2497 * 2498 * @see #findViewsWithText(ArrayList, CharSequence, int) 2499 * 2500 * @hide 2501 */ 2502 public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; 2503 2504 /** 2505 * The undefined cursor position. 2506 */ 2507 private static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; 2508 2509 /** 2510 * Indicates that the screen has changed state and is now off. 2511 * 2512 * @see #onScreenStateChanged(int) 2513 */ 2514 public static final int SCREEN_STATE_OFF = 0x0; 2515 2516 /** 2517 * Indicates that the screen has changed state and is now on. 2518 * 2519 * @see #onScreenStateChanged(int) 2520 */ 2521 public static final int SCREEN_STATE_ON = 0x1; 2522 2523 /** 2524 * Controls the over-scroll mode for this view. 2525 * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, 2526 * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, 2527 * and {@link #OVER_SCROLL_NEVER}. 2528 */ 2529 private int mOverScrollMode; 2530 2531 /** 2532 * The parent this view is attached to. 2533 * {@hide} 2534 * 2535 * @see #getParent() 2536 */ 2537 protected ViewParent mParent; 2538 2539 /** 2540 * {@hide} 2541 */ 2542 AttachInfo mAttachInfo; 2543 2544 /** 2545 * {@hide} 2546 */ 2547 @ViewDebug.ExportedProperty(flagMapping = { 2548 @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, 2549 name = "FORCE_LAYOUT"), 2550 @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, 2551 name = "LAYOUT_REQUIRED"), 2552 @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, 2553 name = "DRAWING_CACHE_INVALID", outputIf = false), 2554 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), 2555 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), 2556 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), 2557 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") 2558 }) 2559 int mPrivateFlags; 2560 int mPrivateFlags2; 2561 int mPrivateFlags3; 2562 2563 /** 2564 * This view's request for the visibility of the status bar. 2565 * @hide 2566 */ 2567 @ViewDebug.ExportedProperty(flagMapping = { 2568 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, 2569 equals = SYSTEM_UI_FLAG_LOW_PROFILE, 2570 name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), 2571 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 2572 equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 2573 name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), 2574 @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, 2575 equals = SYSTEM_UI_FLAG_VISIBLE, 2576 name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) 2577 }) 2578 int mSystemUiVisibility; 2579 2580 /** 2581 * Reference count for transient state. 2582 * @see #setHasTransientState(boolean) 2583 */ 2584 int mTransientStateCount = 0; 2585 2586 /** 2587 * Count of how many windows this view has been attached to. 2588 */ 2589 int mWindowAttachCount; 2590 2591 /** 2592 * The layout parameters associated with this view and used by the parent 2593 * {@link android.view.ViewGroup} to determine how this view should be 2594 * laid out. 2595 * {@hide} 2596 */ 2597 protected ViewGroup.LayoutParams mLayoutParams; 2598 2599 /** 2600 * The view flags hold various views states. 2601 * {@hide} 2602 */ 2603 @ViewDebug.ExportedProperty 2604 int mViewFlags; 2605 2606 static class TransformationInfo { 2607 /** 2608 * The transform matrix for the View. This transform is calculated internally 2609 * based on the rotation, scaleX, and scaleY properties. The identity matrix 2610 * is used by default. Do *not* use this variable directly; instead call 2611 * getMatrix(), which will automatically recalculate the matrix if necessary 2612 * to get the correct matrix based on the latest rotation and scale properties. 2613 */ 2614 private final Matrix mMatrix = new Matrix(); 2615 2616 /** 2617 * The transform matrix for the View. This transform is calculated internally 2618 * based on the rotation, scaleX, and scaleY properties. The identity matrix 2619 * is used by default. Do *not* use this variable directly; instead call 2620 * getInverseMatrix(), which will automatically recalculate the matrix if necessary 2621 * to get the correct matrix based on the latest rotation and scale properties. 2622 */ 2623 private Matrix mInverseMatrix; 2624 2625 /** 2626 * An internal variable that tracks whether we need to recalculate the 2627 * transform matrix, based on whether the rotation or scaleX/Y properties 2628 * have changed since the matrix was last calculated. 2629 */ 2630 boolean mMatrixDirty = false; 2631 2632 /** 2633 * An internal variable that tracks whether we need to recalculate the 2634 * transform matrix, based on whether the rotation or scaleX/Y properties 2635 * have changed since the matrix was last calculated. 2636 */ 2637 private boolean mInverseMatrixDirty = true; 2638 2639 /** 2640 * A variable that tracks whether we need to recalculate the 2641 * transform matrix, based on whether the rotation or scaleX/Y properties 2642 * have changed since the matrix was last calculated. This variable 2643 * is only valid after a call to updateMatrix() or to a function that 2644 * calls it such as getMatrix(), hasIdentityMatrix() and getInverseMatrix(). 2645 */ 2646 private boolean mMatrixIsIdentity = true; 2647 2648 /** 2649 * The Camera object is used to compute a 3D matrix when rotationX or rotationY are set. 2650 */ 2651 private Camera mCamera = null; 2652 2653 /** 2654 * This matrix is used when computing the matrix for 3D rotations. 2655 */ 2656 private Matrix matrix3D = null; 2657 2658 /** 2659 * These prev values are used to recalculate a centered pivot point when necessary. The 2660 * pivot point is only used in matrix operations (when rotation, scale, or translation are 2661 * set), so thes values are only used then as well. 2662 */ 2663 private int mPrevWidth = -1; 2664 private int mPrevHeight = -1; 2665 2666 /** 2667 * The degrees rotation around the vertical axis through the pivot point. 2668 */ 2669 @ViewDebug.ExportedProperty 2670 float mRotationY = 0f; 2671 2672 /** 2673 * The degrees rotation around the horizontal axis through the pivot point. 2674 */ 2675 @ViewDebug.ExportedProperty 2676 float mRotationX = 0f; 2677 2678 /** 2679 * The degrees rotation around the pivot point. 2680 */ 2681 @ViewDebug.ExportedProperty 2682 float mRotation = 0f; 2683 2684 /** 2685 * The amount of translation of the object away from its left property (post-layout). 2686 */ 2687 @ViewDebug.ExportedProperty 2688 float mTranslationX = 0f; 2689 2690 /** 2691 * The amount of translation of the object away from its top property (post-layout). 2692 */ 2693 @ViewDebug.ExportedProperty 2694 float mTranslationY = 0f; 2695 2696 /** 2697 * The amount of scale in the x direction around the pivot point. A 2698 * value of 1 means no scaling is applied. 2699 */ 2700 @ViewDebug.ExportedProperty 2701 float mScaleX = 1f; 2702 2703 /** 2704 * The amount of scale in the y direction around the pivot point. A 2705 * value of 1 means no scaling is applied. 2706 */ 2707 @ViewDebug.ExportedProperty 2708 float mScaleY = 1f; 2709 2710 /** 2711 * The x location of the point around which the view is rotated and scaled. 2712 */ 2713 @ViewDebug.ExportedProperty 2714 float mPivotX = 0f; 2715 2716 /** 2717 * The y location of the point around which the view is rotated and scaled. 2718 */ 2719 @ViewDebug.ExportedProperty 2720 float mPivotY = 0f; 2721 2722 /** 2723 * The opacity of the View. This is a value from 0 to 1, where 0 means 2724 * completely transparent and 1 means completely opaque. 2725 */ 2726 @ViewDebug.ExportedProperty 2727 float mAlpha = 1f; 2728 } 2729 2730 TransformationInfo mTransformationInfo; 2731 2732 private boolean mLastIsOpaque; 2733 2734 /** 2735 * Convenience value to check for float values that are close enough to zero to be considered 2736 * zero. 2737 */ 2738 private static final float NONZERO_EPSILON = .001f; 2739 2740 /** 2741 * The distance in pixels from the left edge of this view's parent 2742 * to the left edge of this view. 2743 * {@hide} 2744 */ 2745 @ViewDebug.ExportedProperty(category = "layout") 2746 protected int mLeft; 2747 /** 2748 * The distance in pixels from the left edge of this view's parent 2749 * to the right edge of this view. 2750 * {@hide} 2751 */ 2752 @ViewDebug.ExportedProperty(category = "layout") 2753 protected int mRight; 2754 /** 2755 * The distance in pixels from the top edge of this view's parent 2756 * to the top edge of this view. 2757 * {@hide} 2758 */ 2759 @ViewDebug.ExportedProperty(category = "layout") 2760 protected int mTop; 2761 /** 2762 * The distance in pixels from the top edge of this view's parent 2763 * to the bottom edge of this view. 2764 * {@hide} 2765 */ 2766 @ViewDebug.ExportedProperty(category = "layout") 2767 protected int mBottom; 2768 2769 /** 2770 * The offset, in pixels, by which the content of this view is scrolled 2771 * horizontally. 2772 * {@hide} 2773 */ 2774 @ViewDebug.ExportedProperty(category = "scrolling") 2775 protected int mScrollX; 2776 /** 2777 * The offset, in pixels, by which the content of this view is scrolled 2778 * vertically. 2779 * {@hide} 2780 */ 2781 @ViewDebug.ExportedProperty(category = "scrolling") 2782 protected int mScrollY; 2783 2784 /** 2785 * The left padding in pixels, that is the distance in pixels between the 2786 * left edge of this view and the left edge of its content. 2787 * {@hide} 2788 */ 2789 @ViewDebug.ExportedProperty(category = "padding") 2790 protected int mPaddingLeft = 0; 2791 /** 2792 * The right padding in pixels, that is the distance in pixels between the 2793 * right edge of this view and the right edge of its content. 2794 * {@hide} 2795 */ 2796 @ViewDebug.ExportedProperty(category = "padding") 2797 protected int mPaddingRight = 0; 2798 /** 2799 * The top padding in pixels, that is the distance in pixels between the 2800 * top edge of this view and the top edge of its content. 2801 * {@hide} 2802 */ 2803 @ViewDebug.ExportedProperty(category = "padding") 2804 protected int mPaddingTop; 2805 /** 2806 * The bottom padding in pixels, that is the distance in pixels between the 2807 * bottom edge of this view and the bottom edge of its content. 2808 * {@hide} 2809 */ 2810 @ViewDebug.ExportedProperty(category = "padding") 2811 protected int mPaddingBottom; 2812 2813 /** 2814 * The layout insets in pixels, that is the distance in pixels between the 2815 * visible edges of this view its bounds. 2816 */ 2817 private Insets mLayoutInsets; 2818 2819 /** 2820 * Briefly describes the view and is primarily used for accessibility support. 2821 */ 2822 private CharSequence mContentDescription; 2823 2824 /** 2825 * Specifies the id of a view for which this view serves as a label for 2826 * accessibility purposes. 2827 */ 2828 private int mLabelForId = View.NO_ID; 2829 2830 /** 2831 * Predicate for matching labeled view id with its label for 2832 * accessibility purposes. 2833 */ 2834 private MatchLabelForPredicate mMatchLabelForPredicate; 2835 2836 /** 2837 * Predicate for matching a view by its id. 2838 */ 2839 private MatchIdPredicate mMatchIdPredicate; 2840 2841 /** 2842 * Cache the paddingRight set by the user to append to the scrollbar's size. 2843 * 2844 * @hide 2845 */ 2846 @ViewDebug.ExportedProperty(category = "padding") 2847 protected int mUserPaddingRight; 2848 2849 /** 2850 * Cache the paddingBottom set by the user to append to the scrollbar's size. 2851 * 2852 * @hide 2853 */ 2854 @ViewDebug.ExportedProperty(category = "padding") 2855 protected int mUserPaddingBottom; 2856 2857 /** 2858 * Cache the paddingLeft set by the user to append to the scrollbar's size. 2859 * 2860 * @hide 2861 */ 2862 @ViewDebug.ExportedProperty(category = "padding") 2863 protected int mUserPaddingLeft; 2864 2865 /** 2866 * Cache the paddingStart set by the user to append to the scrollbar's size. 2867 * 2868 */ 2869 @ViewDebug.ExportedProperty(category = "padding") 2870 int mUserPaddingStart; 2871 2872 /** 2873 * Cache the paddingEnd set by the user to append to the scrollbar's size. 2874 * 2875 */ 2876 @ViewDebug.ExportedProperty(category = "padding") 2877 int mUserPaddingEnd; 2878 2879 /** 2880 * Cache initial left padding. 2881 * 2882 * @hide 2883 */ 2884 int mUserPaddingLeftInitial = UNDEFINED_PADDING; 2885 2886 /** 2887 * Cache initial right padding. 2888 * 2889 * @hide 2890 */ 2891 int mUserPaddingRightInitial = UNDEFINED_PADDING; 2892 2893 /** 2894 * Default undefined padding 2895 */ 2896 private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; 2897 2898 /** 2899 * @hide 2900 */ 2901 int mOldWidthMeasureSpec = Integer.MIN_VALUE; 2902 /** 2903 * @hide 2904 */ 2905 int mOldHeightMeasureSpec = Integer.MIN_VALUE; 2906 2907 private Drawable mBackground; 2908 2909 private int mBackgroundResource; 2910 private boolean mBackgroundSizeChanged; 2911 2912 static class ListenerInfo { 2913 /** 2914 * Listener used to dispatch focus change events. 2915 * This field should be made private, so it is hidden from the SDK. 2916 * {@hide} 2917 */ 2918 protected OnFocusChangeListener mOnFocusChangeListener; 2919 2920 /** 2921 * Listeners for layout change events. 2922 */ 2923 private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; 2924 2925 /** 2926 * Listeners for attach events. 2927 */ 2928 private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; 2929 2930 /** 2931 * Listener used to dispatch click events. 2932 * This field should be made private, so it is hidden from the SDK. 2933 * {@hide} 2934 */ 2935 public OnClickListener mOnClickListener; 2936 2937 /** 2938 * Listener used to dispatch long click events. 2939 * This field should be made private, so it is hidden from the SDK. 2940 * {@hide} 2941 */ 2942 protected OnLongClickListener mOnLongClickListener; 2943 2944 /** 2945 * Listener used to build the context menu. 2946 * This field should be made private, so it is hidden from the SDK. 2947 * {@hide} 2948 */ 2949 protected OnCreateContextMenuListener mOnCreateContextMenuListener; 2950 2951 private OnKeyListener mOnKeyListener; 2952 2953 private OnTouchListener mOnTouchListener; 2954 2955 private OnHoverListener mOnHoverListener; 2956 2957 private OnGenericMotionListener mOnGenericMotionListener; 2958 2959 private OnDragListener mOnDragListener; 2960 2961 private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; 2962 } 2963 2964 ListenerInfo mListenerInfo; 2965 2966 /** 2967 * The application environment this view lives in. 2968 * This field should be made private, so it is hidden from the SDK. 2969 * {@hide} 2970 */ 2971 protected Context mContext; 2972 2973 private final Resources mResources; 2974 2975 private ScrollabilityCache mScrollCache; 2976 2977 private int[] mDrawableState = null; 2978 2979 /** 2980 * Set to true when drawing cache is enabled and cannot be created. 2981 * 2982 * @hide 2983 */ 2984 public boolean mCachingFailed; 2985 2986 private Bitmap mDrawingCache; 2987 private Bitmap mUnscaledDrawingCache; 2988 private HardwareLayer mHardwareLayer; 2989 DisplayList mDisplayList; 2990 2991 /** 2992 * When this view has focus and the next focus is {@link #FOCUS_LEFT}, 2993 * the user may specify which view to go to next. 2994 */ 2995 private int mNextFocusLeftId = View.NO_ID; 2996 2997 /** 2998 * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, 2999 * the user may specify which view to go to next. 3000 */ 3001 private int mNextFocusRightId = View.NO_ID; 3002 3003 /** 3004 * When this view has focus and the next focus is {@link #FOCUS_UP}, 3005 * the user may specify which view to go to next. 3006 */ 3007 private int mNextFocusUpId = View.NO_ID; 3008 3009 /** 3010 * When this view has focus and the next focus is {@link #FOCUS_DOWN}, 3011 * the user may specify which view to go to next. 3012 */ 3013 private int mNextFocusDownId = View.NO_ID; 3014 3015 /** 3016 * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, 3017 * the user may specify which view to go to next. 3018 */ 3019 int mNextFocusForwardId = View.NO_ID; 3020 3021 private CheckForLongPress mPendingCheckForLongPress; 3022 private CheckForTap mPendingCheckForTap = null; 3023 private PerformClick mPerformClick; 3024 private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; 3025 3026 private UnsetPressedState mUnsetPressedState; 3027 3028 /** 3029 * Whether the long press's action has been invoked. The tap's action is invoked on the 3030 * up event while a long press is invoked as soon as the long press duration is reached, so 3031 * a long press could be performed before the tap is checked, in which case the tap's action 3032 * should not be invoked. 3033 */ 3034 private boolean mHasPerformedLongPress; 3035 3036 /** 3037 * The minimum height of the view. We'll try our best to have the height 3038 * of this view to at least this amount. 3039 */ 3040 @ViewDebug.ExportedProperty(category = "measurement") 3041 private int mMinHeight; 3042 3043 /** 3044 * The minimum width of the view. We'll try our best to have the width 3045 * of this view to at least this amount. 3046 */ 3047 @ViewDebug.ExportedProperty(category = "measurement") 3048 private int mMinWidth; 3049 3050 /** 3051 * The delegate to handle touch events that are physically in this view 3052 * but should be handled by another view. 3053 */ 3054 private TouchDelegate mTouchDelegate = null; 3055 3056 /** 3057 * Solid color to use as a background when creating the drawing cache. Enables 3058 * the cache to use 16 bit bitmaps instead of 32 bit. 3059 */ 3060 private int mDrawingCacheBackgroundColor = 0; 3061 3062 /** 3063 * Special tree observer used when mAttachInfo is null. 3064 */ 3065 private ViewTreeObserver mFloatingTreeObserver; 3066 3067 /** 3068 * Cache the touch slop from the context that created the view. 3069 */ 3070 private int mTouchSlop; 3071 3072 /** 3073 * Object that handles automatic animation of view properties. 3074 */ 3075 private ViewPropertyAnimator mAnimator = null; 3076 3077 /** 3078 * Flag indicating that a drag can cross window boundaries. When 3079 * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called 3080 * with this flag set, all visible applications will be able to participate 3081 * in the drag operation and receive the dragged content. 3082 * 3083 * @hide 3084 */ 3085 public static final int DRAG_FLAG_GLOBAL = 1; 3086 3087 /** 3088 * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. 3089 */ 3090 private float mVerticalScrollFactor; 3091 3092 /** 3093 * Position of the vertical scroll bar. 3094 */ 3095 private int mVerticalScrollbarPosition; 3096 3097 /** 3098 * Position the scroll bar at the default position as determined by the system. 3099 */ 3100 public static final int SCROLLBAR_POSITION_DEFAULT = 0; 3101 3102 /** 3103 * Position the scroll bar along the left edge. 3104 */ 3105 public static final int SCROLLBAR_POSITION_LEFT = 1; 3106 3107 /** 3108 * Position the scroll bar along the right edge. 3109 */ 3110 public static final int SCROLLBAR_POSITION_RIGHT = 2; 3111 3112 /** 3113 * Indicates that the view does not have a layer. 3114 * 3115 * @see #getLayerType() 3116 * @see #setLayerType(int, android.graphics.Paint) 3117 * @see #LAYER_TYPE_SOFTWARE 3118 * @see #LAYER_TYPE_HARDWARE 3119 */ 3120 public static final int LAYER_TYPE_NONE = 0; 3121 3122 /** 3123 * <p>Indicates that the view has a software layer. A software layer is backed 3124 * by a bitmap and causes the view to be rendered using Android's software 3125 * rendering pipeline, even if hardware acceleration is enabled.</p> 3126 * 3127 * <p>Software layers have various usages:</p> 3128 * <p>When the application is not using hardware acceleration, a software layer 3129 * is useful to apply a specific color filter and/or blending mode and/or 3130 * translucency to a view and all its children.</p> 3131 * <p>When the application is using hardware acceleration, a software layer 3132 * is useful to render drawing primitives not supported by the hardware 3133 * accelerated pipeline. It can also be used to cache a complex view tree 3134 * into a texture and reduce the complexity of drawing operations. For instance, 3135 * when animating a complex view tree with a translation, a software layer can 3136 * be used to render the view tree only once.</p> 3137 * <p>Software layers should be avoided when the affected view tree updates 3138 * often. Every update will require to re-render the software layer, which can 3139 * potentially be slow (particularly when hardware acceleration is turned on 3140 * since the layer will have to be uploaded into a hardware texture after every 3141 * update.)</p> 3142 * 3143 * @see #getLayerType() 3144 * @see #setLayerType(int, android.graphics.Paint) 3145 * @see #LAYER_TYPE_NONE 3146 * @see #LAYER_TYPE_HARDWARE 3147 */ 3148 public static final int LAYER_TYPE_SOFTWARE = 1; 3149 3150 /** 3151 * <p>Indicates that the view has a hardware layer. A hardware layer is backed 3152 * by a hardware specific texture (generally Frame Buffer Objects or FBO on 3153 * OpenGL hardware) and causes the view to be rendered using Android's hardware 3154 * rendering pipeline, but only if hardware acceleration is turned on for the 3155 * view hierarchy. When hardware acceleration is turned off, hardware layers 3156 * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> 3157 * 3158 * <p>A hardware layer is useful to apply a specific color filter and/or 3159 * blending mode and/or translucency to a view and all its children.</p> 3160 * <p>A hardware layer can be used to cache a complex view tree into a 3161 * texture and reduce the complexity of drawing operations. For instance, 3162 * when animating a complex view tree with a translation, a hardware layer can 3163 * be used to render the view tree only once.</p> 3164 * <p>A hardware layer can also be used to increase the rendering quality when 3165 * rotation transformations are applied on a view. It can also be used to 3166 * prevent potential clipping issues when applying 3D transforms on a view.</p> 3167 * 3168 * @see #getLayerType() 3169 * @see #setLayerType(int, android.graphics.Paint) 3170 * @see #LAYER_TYPE_NONE 3171 * @see #LAYER_TYPE_SOFTWARE 3172 */ 3173 public static final int LAYER_TYPE_HARDWARE = 2; 3174 3175 @ViewDebug.ExportedProperty(category = "drawing", mapping = { 3176 @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), 3177 @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), 3178 @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") 3179 }) 3180 int mLayerType = LAYER_TYPE_NONE; 3181 Paint mLayerPaint; 3182 Rect mLocalDirtyRect; 3183 3184 /** 3185 * Set to true when the view is sending hover accessibility events because it 3186 * is the innermost hovered view. 3187 */ 3188 private boolean mSendingHoverAccessibilityEvents; 3189 3190 /** 3191 * Delegate for injecting accessibility functionality. 3192 */ 3193 AccessibilityDelegate mAccessibilityDelegate; 3194 3195 /** 3196 * Consistency verifier for debugging purposes. 3197 * @hide 3198 */ 3199 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 3200 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 3201 new InputEventConsistencyVerifier(this, 0) : null; 3202 3203 private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); 3204 3205 /** 3206 * Simple constructor to use when creating a view from code. 3207 * 3208 * @param context The Context the view is running in, through which it can 3209 * access the current theme, resources, etc. 3210 */ 3211 public View(Context context) { 3212 mContext = context; 3213 mResources = context != null ? context.getResources() : null; 3214 mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; 3215 // Set layout and text direction defaults 3216 mPrivateFlags2 = 3217 (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | 3218 (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | 3219 (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | 3220 (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | 3221 (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | 3222 (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); 3223 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 3224 setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); 3225 mUserPaddingStart = UNDEFINED_PADDING; 3226 mUserPaddingEnd = UNDEFINED_PADDING; 3227 } 3228 3229 /** 3230 * Constructor that is called when inflating a view from XML. This is called 3231 * when a view is being constructed from an XML file, supplying attributes 3232 * that were specified in the XML file. This version uses a default style of 3233 * 0, so the only attribute values applied are those in the Context's Theme 3234 * and the given AttributeSet. 3235 * 3236 * <p> 3237 * The method onFinishInflate() will be called after all children have been 3238 * added. 3239 * 3240 * @param context The Context the view is running in, through which it can 3241 * access the current theme, resources, etc. 3242 * @param attrs The attributes of the XML tag that is inflating the view. 3243 * @see #View(Context, AttributeSet, int) 3244 */ 3245 public View(Context context, AttributeSet attrs) { 3246 this(context, attrs, 0); 3247 } 3248 3249 /** 3250 * Perform inflation from XML and apply a class-specific base style. This 3251 * constructor of View allows subclasses to use their own base style when 3252 * they are inflating. For example, a Button class's constructor would call 3253 * this version of the super class constructor and supply 3254 * <code>R.attr.buttonStyle</code> for <var>defStyle</var>; this allows 3255 * the theme's button style to modify all of the base view attributes (in 3256 * particular its background) as well as the Button class's attributes. 3257 * 3258 * @param context The Context the view is running in, through which it can 3259 * access the current theme, resources, etc. 3260 * @param attrs The attributes of the XML tag that is inflating the view. 3261 * @param defStyle The default style to apply to this view. If 0, no style 3262 * will be applied (beyond what is included in the theme). This may 3263 * either be an attribute resource, whose value will be retrieved 3264 * from the current theme, or an explicit style resource. 3265 * @see #View(Context, AttributeSet) 3266 */ 3267 public View(Context context, AttributeSet attrs, int defStyle) { 3268 this(context); 3269 3270 TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.View, 3271 defStyle, 0); 3272 3273 Drawable background = null; 3274 3275 int leftPadding = -1; 3276 int topPadding = -1; 3277 int rightPadding = -1; 3278 int bottomPadding = -1; 3279 int startPadding = UNDEFINED_PADDING; 3280 int endPadding = UNDEFINED_PADDING; 3281 3282 int padding = -1; 3283 3284 int viewFlagValues = 0; 3285 int viewFlagMasks = 0; 3286 3287 boolean setScrollContainer = false; 3288 3289 int x = 0; 3290 int y = 0; 3291 3292 float tx = 0; 3293 float ty = 0; 3294 float rotation = 0; 3295 float rotationX = 0; 3296 float rotationY = 0; 3297 float sx = 1f; 3298 float sy = 1f; 3299 boolean transformSet = false; 3300 3301 int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; 3302 int overScrollMode = mOverScrollMode; 3303 boolean initializeScrollbars = false; 3304 3305 boolean leftPaddingDefined = false; 3306 boolean rightPaddingDefined = false; 3307 boolean startPaddingDefined = false; 3308 boolean endPaddingDefined = false; 3309 3310 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3311 3312 final int N = a.getIndexCount(); 3313 for (int i = 0; i < N; i++) { 3314 int attr = a.getIndex(i); 3315 switch (attr) { 3316 case com.android.internal.R.styleable.View_background: 3317 background = a.getDrawable(attr); 3318 break; 3319 case com.android.internal.R.styleable.View_padding: 3320 padding = a.getDimensionPixelSize(attr, -1); 3321 mUserPaddingLeftInitial = padding; 3322 mUserPaddingRightInitial = padding; 3323 leftPaddingDefined = true; 3324 rightPaddingDefined = true; 3325 break; 3326 case com.android.internal.R.styleable.View_paddingLeft: 3327 leftPadding = a.getDimensionPixelSize(attr, -1); 3328 mUserPaddingLeftInitial = leftPadding; 3329 leftPaddingDefined = true; 3330 break; 3331 case com.android.internal.R.styleable.View_paddingTop: 3332 topPadding = a.getDimensionPixelSize(attr, -1); 3333 break; 3334 case com.android.internal.R.styleable.View_paddingRight: 3335 rightPadding = a.getDimensionPixelSize(attr, -1); 3336 mUserPaddingRightInitial = rightPadding; 3337 rightPaddingDefined = true; 3338 break; 3339 case com.android.internal.R.styleable.View_paddingBottom: 3340 bottomPadding = a.getDimensionPixelSize(attr, -1); 3341 break; 3342 case com.android.internal.R.styleable.View_paddingStart: 3343 startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3344 startPaddingDefined = true; 3345 break; 3346 case com.android.internal.R.styleable.View_paddingEnd: 3347 endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3348 endPaddingDefined = true; 3349 break; 3350 case com.android.internal.R.styleable.View_scrollX: 3351 x = a.getDimensionPixelOffset(attr, 0); 3352 break; 3353 case com.android.internal.R.styleable.View_scrollY: 3354 y = a.getDimensionPixelOffset(attr, 0); 3355 break; 3356 case com.android.internal.R.styleable.View_alpha: 3357 setAlpha(a.getFloat(attr, 1f)); 3358 break; 3359 case com.android.internal.R.styleable.View_transformPivotX: 3360 setPivotX(a.getDimensionPixelOffset(attr, 0)); 3361 break; 3362 case com.android.internal.R.styleable.View_transformPivotY: 3363 setPivotY(a.getDimensionPixelOffset(attr, 0)); 3364 break; 3365 case com.android.internal.R.styleable.View_translationX: 3366 tx = a.getDimensionPixelOffset(attr, 0); 3367 transformSet = true; 3368 break; 3369 case com.android.internal.R.styleable.View_translationY: 3370 ty = a.getDimensionPixelOffset(attr, 0); 3371 transformSet = true; 3372 break; 3373 case com.android.internal.R.styleable.View_rotation: 3374 rotation = a.getFloat(attr, 0); 3375 transformSet = true; 3376 break; 3377 case com.android.internal.R.styleable.View_rotationX: 3378 rotationX = a.getFloat(attr, 0); 3379 transformSet = true; 3380 break; 3381 case com.android.internal.R.styleable.View_rotationY: 3382 rotationY = a.getFloat(attr, 0); 3383 transformSet = true; 3384 break; 3385 case com.android.internal.R.styleable.View_scaleX: 3386 sx = a.getFloat(attr, 1f); 3387 transformSet = true; 3388 break; 3389 case com.android.internal.R.styleable.View_scaleY: 3390 sy = a.getFloat(attr, 1f); 3391 transformSet = true; 3392 break; 3393 case com.android.internal.R.styleable.View_id: 3394 mID = a.getResourceId(attr, NO_ID); 3395 break; 3396 case com.android.internal.R.styleable.View_tag: 3397 mTag = a.getText(attr); 3398 break; 3399 case com.android.internal.R.styleable.View_fitsSystemWindows: 3400 if (a.getBoolean(attr, false)) { 3401 viewFlagValues |= FITS_SYSTEM_WINDOWS; 3402 viewFlagMasks |= FITS_SYSTEM_WINDOWS; 3403 } 3404 break; 3405 case com.android.internal.R.styleable.View_focusable: 3406 if (a.getBoolean(attr, false)) { 3407 viewFlagValues |= FOCUSABLE; 3408 viewFlagMasks |= FOCUSABLE_MASK; 3409 } 3410 break; 3411 case com.android.internal.R.styleable.View_focusableInTouchMode: 3412 if (a.getBoolean(attr, false)) { 3413 viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; 3414 viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; 3415 } 3416 break; 3417 case com.android.internal.R.styleable.View_clickable: 3418 if (a.getBoolean(attr, false)) { 3419 viewFlagValues |= CLICKABLE; 3420 viewFlagMasks |= CLICKABLE; 3421 } 3422 break; 3423 case com.android.internal.R.styleable.View_longClickable: 3424 if (a.getBoolean(attr, false)) { 3425 viewFlagValues |= LONG_CLICKABLE; 3426 viewFlagMasks |= LONG_CLICKABLE; 3427 } 3428 break; 3429 case com.android.internal.R.styleable.View_saveEnabled: 3430 if (!a.getBoolean(attr, true)) { 3431 viewFlagValues |= SAVE_DISABLED; 3432 viewFlagMasks |= SAVE_DISABLED_MASK; 3433 } 3434 break; 3435 case com.android.internal.R.styleable.View_duplicateParentState: 3436 if (a.getBoolean(attr, false)) { 3437 viewFlagValues |= DUPLICATE_PARENT_STATE; 3438 viewFlagMasks |= DUPLICATE_PARENT_STATE; 3439 } 3440 break; 3441 case com.android.internal.R.styleable.View_visibility: 3442 final int visibility = a.getInt(attr, 0); 3443 if (visibility != 0) { 3444 viewFlagValues |= VISIBILITY_FLAGS[visibility]; 3445 viewFlagMasks |= VISIBILITY_MASK; 3446 } 3447 break; 3448 case com.android.internal.R.styleable.View_layoutDirection: 3449 // Clear any layout direction flags (included resolved bits) already set 3450 mPrivateFlags2 &= 3451 ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); 3452 // Set the layout direction flags depending on the value of the attribute 3453 final int layoutDirection = a.getInt(attr, -1); 3454 final int value = (layoutDirection != -1) ? 3455 LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; 3456 mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); 3457 break; 3458 case com.android.internal.R.styleable.View_drawingCacheQuality: 3459 final int cacheQuality = a.getInt(attr, 0); 3460 if (cacheQuality != 0) { 3461 viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; 3462 viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; 3463 } 3464 break; 3465 case com.android.internal.R.styleable.View_contentDescription: 3466 setContentDescription(a.getString(attr)); 3467 break; 3468 case com.android.internal.R.styleable.View_labelFor: 3469 setLabelFor(a.getResourceId(attr, NO_ID)); 3470 break; 3471 case com.android.internal.R.styleable.View_soundEffectsEnabled: 3472 if (!a.getBoolean(attr, true)) { 3473 viewFlagValues &= ~SOUND_EFFECTS_ENABLED; 3474 viewFlagMasks |= SOUND_EFFECTS_ENABLED; 3475 } 3476 break; 3477 case com.android.internal.R.styleable.View_hapticFeedbackEnabled: 3478 if (!a.getBoolean(attr, true)) { 3479 viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; 3480 viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; 3481 } 3482 break; 3483 case R.styleable.View_scrollbars: 3484 final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); 3485 if (scrollbars != SCROLLBARS_NONE) { 3486 viewFlagValues |= scrollbars; 3487 viewFlagMasks |= SCROLLBARS_MASK; 3488 initializeScrollbars = true; 3489 } 3490 break; 3491 //noinspection deprecation 3492 case R.styleable.View_fadingEdge: 3493 if (targetSdkVersion >= ICE_CREAM_SANDWICH) { 3494 // Ignore the attribute starting with ICS 3495 break; 3496 } 3497 // With builds < ICS, fall through and apply fading edges 3498 case R.styleable.View_requiresFadingEdge: 3499 final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); 3500 if (fadingEdge != FADING_EDGE_NONE) { 3501 viewFlagValues |= fadingEdge; 3502 viewFlagMasks |= FADING_EDGE_MASK; 3503 initializeFadingEdge(a); 3504 } 3505 break; 3506 case R.styleable.View_scrollbarStyle: 3507 scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); 3508 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 3509 viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; 3510 viewFlagMasks |= SCROLLBARS_STYLE_MASK; 3511 } 3512 break; 3513 case R.styleable.View_isScrollContainer: 3514 setScrollContainer = true; 3515 if (a.getBoolean(attr, false)) { 3516 setScrollContainer(true); 3517 } 3518 break; 3519 case com.android.internal.R.styleable.View_keepScreenOn: 3520 if (a.getBoolean(attr, false)) { 3521 viewFlagValues |= KEEP_SCREEN_ON; 3522 viewFlagMasks |= KEEP_SCREEN_ON; 3523 } 3524 break; 3525 case R.styleable.View_filterTouchesWhenObscured: 3526 if (a.getBoolean(attr, false)) { 3527 viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; 3528 viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; 3529 } 3530 break; 3531 case R.styleable.View_nextFocusLeft: 3532 mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); 3533 break; 3534 case R.styleable.View_nextFocusRight: 3535 mNextFocusRightId = a.getResourceId(attr, View.NO_ID); 3536 break; 3537 case R.styleable.View_nextFocusUp: 3538 mNextFocusUpId = a.getResourceId(attr, View.NO_ID); 3539 break; 3540 case R.styleable.View_nextFocusDown: 3541 mNextFocusDownId = a.getResourceId(attr, View.NO_ID); 3542 break; 3543 case R.styleable.View_nextFocusForward: 3544 mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); 3545 break; 3546 case R.styleable.View_minWidth: 3547 mMinWidth = a.getDimensionPixelSize(attr, 0); 3548 break; 3549 case R.styleable.View_minHeight: 3550 mMinHeight = a.getDimensionPixelSize(attr, 0); 3551 break; 3552 case R.styleable.View_onClick: 3553 if (context.isRestricted()) { 3554 throw new IllegalStateException("The android:onClick attribute cannot " 3555 + "be used within a restricted context"); 3556 } 3557 3558 final String handlerName = a.getString(attr); 3559 if (handlerName != null) { 3560 setOnClickListener(new OnClickListener() { 3561 private Method mHandler; 3562 3563 public void onClick(View v) { 3564 if (mHandler == null) { 3565 try { 3566 mHandler = getContext().getClass().getMethod(handlerName, 3567 View.class); 3568 } catch (NoSuchMethodException e) { 3569 int id = getId(); 3570 String idText = id == NO_ID ? "" : " with id '" 3571 + getContext().getResources().getResourceEntryName( 3572 id) + "'"; 3573 throw new IllegalStateException("Could not find a method " + 3574 handlerName + "(View) in the activity " 3575 + getContext().getClass() + " for onClick handler" 3576 + " on view " + View.this.getClass() + idText, e); 3577 } 3578 } 3579 3580 try { 3581 mHandler.invoke(getContext(), View.this); 3582 } catch (IllegalAccessException e) { 3583 throw new IllegalStateException("Could not execute non " 3584 + "public method of the activity", e); 3585 } catch (InvocationTargetException e) { 3586 throw new IllegalStateException("Could not execute " 3587 + "method of the activity", e); 3588 } 3589 } 3590 }); 3591 } 3592 break; 3593 case R.styleable.View_overScrollMode: 3594 overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); 3595 break; 3596 case R.styleable.View_verticalScrollbarPosition: 3597 mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); 3598 break; 3599 case R.styleable.View_layerType: 3600 setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); 3601 break; 3602 case R.styleable.View_textDirection: 3603 // Clear any text direction flag already set 3604 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 3605 // Set the text direction flags depending on the value of the attribute 3606 final int textDirection = a.getInt(attr, -1); 3607 if (textDirection != -1) { 3608 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; 3609 } 3610 break; 3611 case R.styleable.View_textAlignment: 3612 // Clear any text alignment flag already set 3613 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 3614 // Set the text alignment flag depending on the value of the attribute 3615 final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); 3616 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; 3617 break; 3618 case R.styleable.View_importantForAccessibility: 3619 setImportantForAccessibility(a.getInt(attr, 3620 IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); 3621 break; 3622 } 3623 } 3624 3625 setOverScrollMode(overScrollMode); 3626 3627 // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet 3628 // the resolved layout direction). Those cached values will be used later during padding 3629 // resolution. 3630 mUserPaddingStart = startPadding; 3631 mUserPaddingEnd = endPadding; 3632 3633 if (background != null) { 3634 setBackground(background); 3635 } 3636 3637 if (padding >= 0) { 3638 leftPadding = padding; 3639 topPadding = padding; 3640 rightPadding = padding; 3641 bottomPadding = padding; 3642 mUserPaddingLeftInitial = padding; 3643 mUserPaddingRightInitial = padding; 3644 } 3645 3646 // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. 3647 // left / right padding are used if defined (meaning here nothing to do). If they are not 3648 // defined and start / end padding are defined (e.g. in Frameworks resources), then we use 3649 // start / end and resolve them as left / right (layout direction is not taken into account). 3650 if (isRtlCompatibilityMode()) { 3651 if (!leftPaddingDefined && startPaddingDefined) { 3652 leftPadding = startPadding; 3653 } 3654 if (!rightPaddingDefined && endPaddingDefined) { 3655 rightPadding = endPadding; 3656 } 3657 } 3658 3659 // If the user specified the padding (either with android:padding or 3660 // android:paddingLeft/Top/Right/Bottom), use this padding, otherwise 3661 // use the default padding or the padding from the background drawable 3662 // (stored at this point in mPadding*). Padding resolution will happen later if 3663 // RTL is supported. 3664 mUserPaddingLeftInitial = leftPadding >= 0 ? leftPadding : mPaddingLeft; 3665 mUserPaddingRightInitial = rightPadding >= 0 ? rightPadding : mPaddingRight; 3666 internalSetPadding( 3667 mUserPaddingLeftInitial, 3668 topPadding >= 0 ? topPadding : mPaddingTop, 3669 mUserPaddingRightInitial, 3670 bottomPadding >= 0 ? bottomPadding : mPaddingBottom); 3671 3672 if (viewFlagMasks != 0) { 3673 setFlags(viewFlagValues, viewFlagMasks); 3674 } 3675 3676 if (initializeScrollbars) { 3677 initializeScrollbars(a); 3678 } 3679 3680 a.recycle(); 3681 3682 // Needs to be called after mViewFlags is set 3683 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 3684 recomputePadding(); 3685 } 3686 3687 if (x != 0 || y != 0) { 3688 scrollTo(x, y); 3689 } 3690 3691 if (transformSet) { 3692 setTranslationX(tx); 3693 setTranslationY(ty); 3694 setRotation(rotation); 3695 setRotationX(rotationX); 3696 setRotationY(rotationY); 3697 setScaleX(sx); 3698 setScaleY(sy); 3699 } 3700 3701 if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { 3702 setScrollContainer(true); 3703 } 3704 3705 computeOpaqueFlags(); 3706 } 3707 3708 /** 3709 * Non-public constructor for use in testing 3710 */ 3711 View() { 3712 mResources = null; 3713 } 3714 3715 public String toString() { 3716 StringBuilder out = new StringBuilder(128); 3717 out.append(getClass().getName()); 3718 out.append('{'); 3719 out.append(Integer.toHexString(System.identityHashCode(this))); 3720 out.append(' '); 3721 switch (mViewFlags&VISIBILITY_MASK) { 3722 case VISIBLE: out.append('V'); break; 3723 case INVISIBLE: out.append('I'); break; 3724 case GONE: out.append('G'); break; 3725 default: out.append('.'); break; 3726 } 3727 out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); 3728 out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); 3729 out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); 3730 out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); 3731 out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); 3732 out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); 3733 out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); 3734 out.append(' '); 3735 out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); 3736 out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); 3737 out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); 3738 if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { 3739 out.append('p'); 3740 } else { 3741 out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); 3742 } 3743 out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); 3744 out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); 3745 out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); 3746 out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); 3747 out.append(' '); 3748 out.append(mLeft); 3749 out.append(','); 3750 out.append(mTop); 3751 out.append('-'); 3752 out.append(mRight); 3753 out.append(','); 3754 out.append(mBottom); 3755 final int id = getId(); 3756 if (id != NO_ID) { 3757 out.append(" #"); 3758 out.append(Integer.toHexString(id)); 3759 final Resources r = mResources; 3760 if (id != 0 && r != null) { 3761 try { 3762 String pkgname; 3763 switch (id&0xff000000) { 3764 case 0x7f000000: 3765 pkgname="app"; 3766 break; 3767 case 0x01000000: 3768 pkgname="android"; 3769 break; 3770 default: 3771 pkgname = r.getResourcePackageName(id); 3772 break; 3773 } 3774 String typename = r.getResourceTypeName(id); 3775 String entryname = r.getResourceEntryName(id); 3776 out.append(" "); 3777 out.append(pkgname); 3778 out.append(":"); 3779 out.append(typename); 3780 out.append("/"); 3781 out.append(entryname); 3782 } catch (Resources.NotFoundException e) { 3783 } 3784 } 3785 } 3786 out.append("}"); 3787 return out.toString(); 3788 } 3789 3790 /** 3791 * <p> 3792 * Initializes the fading edges from a given set of styled attributes. This 3793 * method should be called by subclasses that need fading edges and when an 3794 * instance of these subclasses is created programmatically rather than 3795 * being inflated from XML. This method is automatically called when the XML 3796 * is inflated. 3797 * </p> 3798 * 3799 * @param a the styled attributes set to initialize the fading edges from 3800 */ 3801 protected void initializeFadingEdge(TypedArray a) { 3802 initScrollCache(); 3803 3804 mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( 3805 R.styleable.View_fadingEdgeLength, 3806 ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); 3807 } 3808 3809 /** 3810 * Returns the size of the vertical faded edges used to indicate that more 3811 * content in this view is visible. 3812 * 3813 * @return The size in pixels of the vertical faded edge or 0 if vertical 3814 * faded edges are not enabled for this view. 3815 * @attr ref android.R.styleable#View_fadingEdgeLength 3816 */ 3817 public int getVerticalFadingEdgeLength() { 3818 if (isVerticalFadingEdgeEnabled()) { 3819 ScrollabilityCache cache = mScrollCache; 3820 if (cache != null) { 3821 return cache.fadingEdgeLength; 3822 } 3823 } 3824 return 0; 3825 } 3826 3827 /** 3828 * Set the size of the faded edge used to indicate that more content in this 3829 * view is available. Will not change whether the fading edge is enabled; use 3830 * {@link #setVerticalFadingEdgeEnabled(boolean)} or 3831 * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge 3832 * for the vertical or horizontal fading edges. 3833 * 3834 * @param length The size in pixels of the faded edge used to indicate that more 3835 * content in this view is visible. 3836 */ 3837 public void setFadingEdgeLength(int length) { 3838 initScrollCache(); 3839 mScrollCache.fadingEdgeLength = length; 3840 } 3841 3842 /** 3843 * Returns the size of the horizontal faded edges used to indicate that more 3844 * content in this view is visible. 3845 * 3846 * @return The size in pixels of the horizontal faded edge or 0 if horizontal 3847 * faded edges are not enabled for this view. 3848 * @attr ref android.R.styleable#View_fadingEdgeLength 3849 */ 3850 public int getHorizontalFadingEdgeLength() { 3851 if (isHorizontalFadingEdgeEnabled()) { 3852 ScrollabilityCache cache = mScrollCache; 3853 if (cache != null) { 3854 return cache.fadingEdgeLength; 3855 } 3856 } 3857 return 0; 3858 } 3859 3860 /** 3861 * Returns the width of the vertical scrollbar. 3862 * 3863 * @return The width in pixels of the vertical scrollbar or 0 if there 3864 * is no vertical scrollbar. 3865 */ 3866 public int getVerticalScrollbarWidth() { 3867 ScrollabilityCache cache = mScrollCache; 3868 if (cache != null) { 3869 ScrollBarDrawable scrollBar = cache.scrollBar; 3870 if (scrollBar != null) { 3871 int size = scrollBar.getSize(true); 3872 if (size <= 0) { 3873 size = cache.scrollBarSize; 3874 } 3875 return size; 3876 } 3877 return 0; 3878 } 3879 return 0; 3880 } 3881 3882 /** 3883 * Returns the height of the horizontal scrollbar. 3884 * 3885 * @return The height in pixels of the horizontal scrollbar or 0 if 3886 * there is no horizontal scrollbar. 3887 */ 3888 protected int getHorizontalScrollbarHeight() { 3889 ScrollabilityCache cache = mScrollCache; 3890 if (cache != null) { 3891 ScrollBarDrawable scrollBar = cache.scrollBar; 3892 if (scrollBar != null) { 3893 int size = scrollBar.getSize(false); 3894 if (size <= 0) { 3895 size = cache.scrollBarSize; 3896 } 3897 return size; 3898 } 3899 return 0; 3900 } 3901 return 0; 3902 } 3903 3904 /** 3905 * <p> 3906 * Initializes the scrollbars from a given set of styled attributes. This 3907 * method should be called by subclasses that need scrollbars and when an 3908 * instance of these subclasses is created programmatically rather than 3909 * being inflated from XML. This method is automatically called when the XML 3910 * is inflated. 3911 * </p> 3912 * 3913 * @param a the styled attributes set to initialize the scrollbars from 3914 */ 3915 protected void initializeScrollbars(TypedArray a) { 3916 initScrollCache(); 3917 3918 final ScrollabilityCache scrollabilityCache = mScrollCache; 3919 3920 if (scrollabilityCache.scrollBar == null) { 3921 scrollabilityCache.scrollBar = new ScrollBarDrawable(); 3922 } 3923 3924 final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); 3925 3926 if (!fadeScrollbars) { 3927 scrollabilityCache.state = ScrollabilityCache.ON; 3928 } 3929 scrollabilityCache.fadeScrollBars = fadeScrollbars; 3930 3931 3932 scrollabilityCache.scrollBarFadeDuration = a.getInt( 3933 R.styleable.View_scrollbarFadeDuration, ViewConfiguration 3934 .getScrollBarFadeDuration()); 3935 scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( 3936 R.styleable.View_scrollbarDefaultDelayBeforeFade, 3937 ViewConfiguration.getScrollDefaultDelay()); 3938 3939 3940 scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( 3941 com.android.internal.R.styleable.View_scrollbarSize, 3942 ViewConfiguration.get(mContext).getScaledScrollBarSize()); 3943 3944 Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); 3945 scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); 3946 3947 Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); 3948 if (thumb != null) { 3949 scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); 3950 } 3951 3952 boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, 3953 false); 3954 if (alwaysDraw) { 3955 scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); 3956 } 3957 3958 track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); 3959 scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); 3960 3961 thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); 3962 if (thumb != null) { 3963 scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); 3964 } 3965 3966 alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, 3967 false); 3968 if (alwaysDraw) { 3969 scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); 3970 } 3971 3972 // Apply layout direction to the new Drawables if needed 3973 final int layoutDirection = getLayoutDirection(); 3974 if (track != null) { 3975 track.setLayoutDirection(layoutDirection); 3976 } 3977 if (thumb != null) { 3978 thumb.setLayoutDirection(layoutDirection); 3979 } 3980 3981 // Re-apply user/background padding so that scrollbar(s) get added 3982 resolvePadding(); 3983 } 3984 3985 /** 3986 * <p> 3987 * Initalizes the scrollability cache if necessary. 3988 * </p> 3989 */ 3990 private void initScrollCache() { 3991 if (mScrollCache == null) { 3992 mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); 3993 } 3994 } 3995 3996 private ScrollabilityCache getScrollCache() { 3997 initScrollCache(); 3998 return mScrollCache; 3999 } 4000 4001 /** 4002 * Set the position of the vertical scroll bar. Should be one of 4003 * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or 4004 * {@link #SCROLLBAR_POSITION_RIGHT}. 4005 * 4006 * @param position Where the vertical scroll bar should be positioned. 4007 */ 4008 public void setVerticalScrollbarPosition(int position) { 4009 if (mVerticalScrollbarPosition != position) { 4010 mVerticalScrollbarPosition = position; 4011 computeOpaqueFlags(); 4012 resolvePadding(); 4013 } 4014 } 4015 4016 /** 4017 * @return The position where the vertical scroll bar will show, if applicable. 4018 * @see #setVerticalScrollbarPosition(int) 4019 */ 4020 public int getVerticalScrollbarPosition() { 4021 return mVerticalScrollbarPosition; 4022 } 4023 4024 ListenerInfo getListenerInfo() { 4025 if (mListenerInfo != null) { 4026 return mListenerInfo; 4027 } 4028 mListenerInfo = new ListenerInfo(); 4029 return mListenerInfo; 4030 } 4031 4032 /** 4033 * Register a callback to be invoked when focus of this view changed. 4034 * 4035 * @param l The callback that will run. 4036 */ 4037 public void setOnFocusChangeListener(OnFocusChangeListener l) { 4038 getListenerInfo().mOnFocusChangeListener = l; 4039 } 4040 4041 /** 4042 * Add a listener that will be called when the bounds of the view change due to 4043 * layout processing. 4044 * 4045 * @param listener The listener that will be called when layout bounds change. 4046 */ 4047 public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { 4048 ListenerInfo li = getListenerInfo(); 4049 if (li.mOnLayoutChangeListeners == null) { 4050 li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); 4051 } 4052 if (!li.mOnLayoutChangeListeners.contains(listener)) { 4053 li.mOnLayoutChangeListeners.add(listener); 4054 } 4055 } 4056 4057 /** 4058 * Remove a listener for layout changes. 4059 * 4060 * @param listener The listener for layout bounds change. 4061 */ 4062 public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { 4063 ListenerInfo li = mListenerInfo; 4064 if (li == null || li.mOnLayoutChangeListeners == null) { 4065 return; 4066 } 4067 li.mOnLayoutChangeListeners.remove(listener); 4068 } 4069 4070 /** 4071 * Add a listener for attach state changes. 4072 * 4073 * This listener will be called whenever this view is attached or detached 4074 * from a window. Remove the listener using 4075 * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. 4076 * 4077 * @param listener Listener to attach 4078 * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) 4079 */ 4080 public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 4081 ListenerInfo li = getListenerInfo(); 4082 if (li.mOnAttachStateChangeListeners == null) { 4083 li.mOnAttachStateChangeListeners 4084 = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); 4085 } 4086 li.mOnAttachStateChangeListeners.add(listener); 4087 } 4088 4089 /** 4090 * Remove a listener for attach state changes. The listener will receive no further 4091 * notification of window attach/detach events. 4092 * 4093 * @param listener Listener to remove 4094 * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) 4095 */ 4096 public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 4097 ListenerInfo li = mListenerInfo; 4098 if (li == null || li.mOnAttachStateChangeListeners == null) { 4099 return; 4100 } 4101 li.mOnAttachStateChangeListeners.remove(listener); 4102 } 4103 4104 /** 4105 * Returns the focus-change callback registered for this view. 4106 * 4107 * @return The callback, or null if one is not registered. 4108 */ 4109 public OnFocusChangeListener getOnFocusChangeListener() { 4110 ListenerInfo li = mListenerInfo; 4111 return li != null ? li.mOnFocusChangeListener : null; 4112 } 4113 4114 /** 4115 * Register a callback to be invoked when this view is clicked. If this view is not 4116 * clickable, it becomes clickable. 4117 * 4118 * @param l The callback that will run 4119 * 4120 * @see #setClickable(boolean) 4121 */ 4122 public void setOnClickListener(OnClickListener l) { 4123 if (!isClickable()) { 4124 setClickable(true); 4125 } 4126 getListenerInfo().mOnClickListener = l; 4127 } 4128 4129 /** 4130 * Return whether this view has an attached OnClickListener. Returns 4131 * true if there is a listener, false if there is none. 4132 */ 4133 public boolean hasOnClickListeners() { 4134 ListenerInfo li = mListenerInfo; 4135 return (li != null && li.mOnClickListener != null); 4136 } 4137 4138 /** 4139 * Register a callback to be invoked when this view is clicked and held. If this view is not 4140 * long clickable, it becomes long clickable. 4141 * 4142 * @param l The callback that will run 4143 * 4144 * @see #setLongClickable(boolean) 4145 */ 4146 public void setOnLongClickListener(OnLongClickListener l) { 4147 if (!isLongClickable()) { 4148 setLongClickable(true); 4149 } 4150 getListenerInfo().mOnLongClickListener = l; 4151 } 4152 4153 /** 4154 * Register a callback to be invoked when the context menu for this view is 4155 * being built. If this view is not long clickable, it becomes long clickable. 4156 * 4157 * @param l The callback that will run 4158 * 4159 */ 4160 public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { 4161 if (!isLongClickable()) { 4162 setLongClickable(true); 4163 } 4164 getListenerInfo().mOnCreateContextMenuListener = l; 4165 } 4166 4167 /** 4168 * Call this view's OnClickListener, if it is defined. Performs all normal 4169 * actions associated with clicking: reporting accessibility event, playing 4170 * a sound, etc. 4171 * 4172 * @return True there was an assigned OnClickListener that was called, false 4173 * otherwise is returned. 4174 */ 4175 public boolean performClick() { 4176 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 4177 4178 ListenerInfo li = mListenerInfo; 4179 if (li != null && li.mOnClickListener != null) { 4180 playSoundEffect(SoundEffectConstants.CLICK); 4181 li.mOnClickListener.onClick(this); 4182 return true; 4183 } 4184 4185 return false; 4186 } 4187 4188 /** 4189 * Directly call any attached OnClickListener. Unlike {@link #performClick()}, 4190 * this only calls the listener, and does not do any associated clicking 4191 * actions like reporting an accessibility event. 4192 * 4193 * @return True there was an assigned OnClickListener that was called, false 4194 * otherwise is returned. 4195 */ 4196 public boolean callOnClick() { 4197 ListenerInfo li = mListenerInfo; 4198 if (li != null && li.mOnClickListener != null) { 4199 li.mOnClickListener.onClick(this); 4200 return true; 4201 } 4202 return false; 4203 } 4204 4205 /** 4206 * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the 4207 * OnLongClickListener did not consume the event. 4208 * 4209 * @return True if one of the above receivers consumed the event, false otherwise. 4210 */ 4211 public boolean performLongClick() { 4212 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); 4213 4214 boolean handled = false; 4215 ListenerInfo li = mListenerInfo; 4216 if (li != null && li.mOnLongClickListener != null) { 4217 handled = li.mOnLongClickListener.onLongClick(View.this); 4218 } 4219 if (!handled) { 4220 handled = showContextMenu(); 4221 } 4222 if (handled) { 4223 performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 4224 } 4225 return handled; 4226 } 4227 4228 /** 4229 * Performs button-related actions during a touch down event. 4230 * 4231 * @param event The event. 4232 * @return True if the down was consumed. 4233 * 4234 * @hide 4235 */ 4236 protected boolean performButtonActionOnTouchDown(MotionEvent event) { 4237 if ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { 4238 if (showContextMenu(event.getX(), event.getY(), event.getMetaState())) { 4239 return true; 4240 } 4241 } 4242 return false; 4243 } 4244 4245 /** 4246 * Bring up the context menu for this view. 4247 * 4248 * @return Whether a context menu was displayed. 4249 */ 4250 public boolean showContextMenu() { 4251 return getParent().showContextMenuForChild(this); 4252 } 4253 4254 /** 4255 * Bring up the context menu for this view, referring to the item under the specified point. 4256 * 4257 * @param x The referenced x coordinate. 4258 * @param y The referenced y coordinate. 4259 * @param metaState The keyboard modifiers that were pressed. 4260 * @return Whether a context menu was displayed. 4261 * 4262 * @hide 4263 */ 4264 public boolean showContextMenu(float x, float y, int metaState) { 4265 return showContextMenu(); 4266 } 4267 4268 /** 4269 * Start an action mode. 4270 * 4271 * @param callback Callback that will control the lifecycle of the action mode 4272 * @return The new action mode if it is started, null otherwise 4273 * 4274 * @see ActionMode 4275 */ 4276 public ActionMode startActionMode(ActionMode.Callback callback) { 4277 ViewParent parent = getParent(); 4278 if (parent == null) return null; 4279 return parent.startActionModeForChild(this, callback); 4280 } 4281 4282 /** 4283 * Register a callback to be invoked when a hardware key is pressed in this view. 4284 * Key presses in software input methods will generally not trigger the methods of 4285 * this listener. 4286 * @param l the key listener to attach to this view 4287 */ 4288 public void setOnKeyListener(OnKeyListener l) { 4289 getListenerInfo().mOnKeyListener = l; 4290 } 4291 4292 /** 4293 * Register a callback to be invoked when a touch event is sent to this view. 4294 * @param l the touch listener to attach to this view 4295 */ 4296 public void setOnTouchListener(OnTouchListener l) { 4297 getListenerInfo().mOnTouchListener = l; 4298 } 4299 4300 /** 4301 * Register a callback to be invoked when a generic motion event is sent to this view. 4302 * @param l the generic motion listener to attach to this view 4303 */ 4304 public void setOnGenericMotionListener(OnGenericMotionListener l) { 4305 getListenerInfo().mOnGenericMotionListener = l; 4306 } 4307 4308 /** 4309 * Register a callback to be invoked when a hover event is sent to this view. 4310 * @param l the hover listener to attach to this view 4311 */ 4312 public void setOnHoverListener(OnHoverListener l) { 4313 getListenerInfo().mOnHoverListener = l; 4314 } 4315 4316 /** 4317 * Register a drag event listener callback object for this View. The parameter is 4318 * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a 4319 * View, the system calls the 4320 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. 4321 * @param l An implementation of {@link android.view.View.OnDragListener}. 4322 */ 4323 public void setOnDragListener(OnDragListener l) { 4324 getListenerInfo().mOnDragListener = l; 4325 } 4326 4327 /** 4328 * Give this view focus. This will cause 4329 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. 4330 * 4331 * Note: this does not check whether this {@link View} should get focus, it just 4332 * gives it focus no matter what. It should only be called internally by framework 4333 * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. 4334 * 4335 * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, 4336 * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which 4337 * focus moved when requestFocus() is called. It may not always 4338 * apply, in which case use the default View.FOCUS_DOWN. 4339 * @param previouslyFocusedRect The rectangle of the view that had focus 4340 * prior in this View's coordinate system. 4341 */ 4342 void handleFocusGainInternal(int direction, Rect previouslyFocusedRect) { 4343 if (DBG) { 4344 System.out.println(this + " requestFocus()"); 4345 } 4346 4347 if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { 4348 mPrivateFlags |= PFLAG_FOCUSED; 4349 4350 if (mParent != null) { 4351 mParent.requestChildFocus(this, this); 4352 } 4353 4354 onFocusChanged(true, direction, previouslyFocusedRect); 4355 refreshDrawableState(); 4356 4357 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 4358 notifyAccessibilityStateChanged(); 4359 } 4360 } 4361 } 4362 4363 /** 4364 * Request that a rectangle of this view be visible on the screen, 4365 * scrolling if necessary just enough. 4366 * 4367 * <p>A View should call this if it maintains some notion of which part 4368 * of its content is interesting. For example, a text editing view 4369 * should call this when its cursor moves. 4370 * 4371 * @param rectangle The rectangle. 4372 * @return Whether any parent scrolled. 4373 */ 4374 public boolean requestRectangleOnScreen(Rect rectangle) { 4375 return requestRectangleOnScreen(rectangle, false); 4376 } 4377 4378 /** 4379 * Request that a rectangle of this view be visible on the screen, 4380 * scrolling if necessary just enough. 4381 * 4382 * <p>A View should call this if it maintains some notion of which part 4383 * of its content is interesting. For example, a text editing view 4384 * should call this when its cursor moves. 4385 * 4386 * <p>When <code>immediate</code> is set to true, scrolling will not be 4387 * animated. 4388 * 4389 * @param rectangle The rectangle. 4390 * @param immediate True to forbid animated scrolling, false otherwise 4391 * @return Whether any parent scrolled. 4392 */ 4393 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 4394 if (mParent == null) { 4395 return false; 4396 } 4397 4398 View child = this; 4399 4400 RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); 4401 position.set(rectangle); 4402 4403 ViewParent parent = mParent; 4404 boolean scrolled = false; 4405 while (parent != null) { 4406 rectangle.set((int) position.left, (int) position.top, 4407 (int) position.right, (int) position.bottom); 4408 4409 scrolled |= parent.requestChildRectangleOnScreen(child, 4410 rectangle, immediate); 4411 4412 if (!child.hasIdentityMatrix()) { 4413 child.getMatrix().mapRect(position); 4414 } 4415 4416 position.offset(child.mLeft, child.mTop); 4417 4418 if (!(parent instanceof View)) { 4419 break; 4420 } 4421 4422 View parentView = (View) parent; 4423 4424 position.offset(-parentView.getScrollX(), -parentView.getScrollY()); 4425 4426 child = parentView; 4427 parent = child.getParent(); 4428 } 4429 4430 return scrolled; 4431 } 4432 4433 /** 4434 * Called when this view wants to give up focus. If focus is cleared 4435 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. 4436 * <p> 4437 * <strong>Note:</strong> When a View clears focus the framework is trying 4438 * to give focus to the first focusable View from the top. Hence, if this 4439 * View is the first from the top that can take focus, then all callbacks 4440 * related to clearing focus will be invoked after wich the framework will 4441 * give focus to this view. 4442 * </p> 4443 */ 4444 public void clearFocus() { 4445 if (DBG) { 4446 System.out.println(this + " clearFocus()"); 4447 } 4448 4449 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 4450 mPrivateFlags &= ~PFLAG_FOCUSED; 4451 4452 if (mParent != null) { 4453 mParent.clearChildFocus(this); 4454 } 4455 4456 onFocusChanged(false, 0, null); 4457 4458 refreshDrawableState(); 4459 4460 ensureInputFocusOnFirstFocusable(); 4461 4462 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 4463 notifyAccessibilityStateChanged(); 4464 } 4465 } 4466 } 4467 4468 void ensureInputFocusOnFirstFocusable() { 4469 View root = getRootView(); 4470 if (root != null) { 4471 root.requestFocus(); 4472 } 4473 } 4474 4475 /** 4476 * Called internally by the view system when a new view is getting focus. 4477 * This is what clears the old focus. 4478 */ 4479 void unFocus() { 4480 if (DBG) { 4481 System.out.println(this + " unFocus()"); 4482 } 4483 4484 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 4485 mPrivateFlags &= ~PFLAG_FOCUSED; 4486 4487 onFocusChanged(false, 0, null); 4488 refreshDrawableState(); 4489 4490 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 4491 notifyAccessibilityStateChanged(); 4492 } 4493 } 4494 } 4495 4496 /** 4497 * Returns true if this view has focus iteself, or is the ancestor of the 4498 * view that has focus. 4499 * 4500 * @return True if this view has or contains focus, false otherwise. 4501 */ 4502 @ViewDebug.ExportedProperty(category = "focus") 4503 public boolean hasFocus() { 4504 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 4505 } 4506 4507 /** 4508 * Returns true if this view is focusable or if it contains a reachable View 4509 * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" 4510 * is a View whose parents do not block descendants focus. 4511 * 4512 * Only {@link #VISIBLE} views are considered focusable. 4513 * 4514 * @return True if the view is focusable or if the view contains a focusable 4515 * View, false otherwise. 4516 * 4517 * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS 4518 */ 4519 public boolean hasFocusable() { 4520 return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); 4521 } 4522 4523 /** 4524 * Called by the view system when the focus state of this view changes. 4525 * When the focus change event is caused by directional navigation, direction 4526 * and previouslyFocusedRect provide insight into where the focus is coming from. 4527 * When overriding, be sure to call up through to the super class so that 4528 * the standard focus handling will occur. 4529 * 4530 * @param gainFocus True if the View has focus; false otherwise. 4531 * @param direction The direction focus has moved when requestFocus() 4532 * is called to give this view focus. Values are 4533 * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, 4534 * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. 4535 * It may not always apply, in which case use the default. 4536 * @param previouslyFocusedRect The rectangle, in this view's coordinate 4537 * system, of the previously focused view. If applicable, this will be 4538 * passed in as finer grained information about where the focus is coming 4539 * from (in addition to direction). Will be <code>null</code> otherwise. 4540 */ 4541 protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { 4542 if (gainFocus) { 4543 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 4544 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 4545 } 4546 } 4547 4548 InputMethodManager imm = InputMethodManager.peekInstance(); 4549 if (!gainFocus) { 4550 if (isPressed()) { 4551 setPressed(false); 4552 } 4553 if (imm != null && mAttachInfo != null 4554 && mAttachInfo.mHasWindowFocus) { 4555 imm.focusOut(this); 4556 } 4557 onFocusLost(); 4558 } else if (imm != null && mAttachInfo != null 4559 && mAttachInfo.mHasWindowFocus) { 4560 imm.focusIn(this); 4561 } 4562 4563 invalidate(true); 4564 ListenerInfo li = mListenerInfo; 4565 if (li != null && li.mOnFocusChangeListener != null) { 4566 li.mOnFocusChangeListener.onFocusChange(this, gainFocus); 4567 } 4568 4569 if (mAttachInfo != null) { 4570 mAttachInfo.mKeyDispatchState.reset(this); 4571 } 4572 } 4573 4574 /** 4575 * Sends an accessibility event of the given type. If accessibility is 4576 * not enabled this method has no effect. The default implementation calls 4577 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first 4578 * to populate information about the event source (this View), then calls 4579 * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to 4580 * populate the text content of the event source including its descendants, 4581 * and last calls 4582 * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} 4583 * on its parent to resuest sending of the event to interested parties. 4584 * <p> 4585 * If an {@link AccessibilityDelegate} has been specified via calling 4586 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4587 * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is 4588 * responsible for handling this call. 4589 * </p> 4590 * 4591 * @param eventType The type of the event to send, as defined by several types from 4592 * {@link android.view.accessibility.AccessibilityEvent}, such as 4593 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or 4594 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. 4595 * 4596 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 4597 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 4598 * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) 4599 * @see AccessibilityDelegate 4600 */ 4601 public void sendAccessibilityEvent(int eventType) { 4602 if (mAccessibilityDelegate != null) { 4603 mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); 4604 } else { 4605 sendAccessibilityEventInternal(eventType); 4606 } 4607 } 4608 4609 /** 4610 * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} 4611 * {@link AccessibilityEvent} to make an announcement which is related to some 4612 * sort of a context change for which none of the events representing UI transitions 4613 * is a good fit. For example, announcing a new page in a book. If accessibility 4614 * is not enabled this method does nothing. 4615 * 4616 * @param text The announcement text. 4617 */ 4618 public void announceForAccessibility(CharSequence text) { 4619 if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { 4620 AccessibilityEvent event = AccessibilityEvent.obtain( 4621 AccessibilityEvent.TYPE_ANNOUNCEMENT); 4622 onInitializeAccessibilityEvent(event); 4623 event.getText().add(text); 4624 event.setContentDescription(null); 4625 mParent.requestSendAccessibilityEvent(this, event); 4626 } 4627 } 4628 4629 /** 4630 * @see #sendAccessibilityEvent(int) 4631 * 4632 * Note: Called from the default {@link AccessibilityDelegate}. 4633 */ 4634 void sendAccessibilityEventInternal(int eventType) { 4635 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 4636 sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); 4637 } 4638 } 4639 4640 /** 4641 * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but 4642 * takes as an argument an empty {@link AccessibilityEvent} and does not 4643 * perform a check whether accessibility is enabled. 4644 * <p> 4645 * If an {@link AccessibilityDelegate} has been specified via calling 4646 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4647 * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} 4648 * is responsible for handling this call. 4649 * </p> 4650 * 4651 * @param event The event to send. 4652 * 4653 * @see #sendAccessibilityEvent(int) 4654 */ 4655 public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { 4656 if (mAccessibilityDelegate != null) { 4657 mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); 4658 } else { 4659 sendAccessibilityEventUncheckedInternal(event); 4660 } 4661 } 4662 4663 /** 4664 * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) 4665 * 4666 * Note: Called from the default {@link AccessibilityDelegate}. 4667 */ 4668 void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { 4669 if (!isShown()) { 4670 return; 4671 } 4672 onInitializeAccessibilityEvent(event); 4673 // Only a subset of accessibility events populates text content. 4674 if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { 4675 dispatchPopulateAccessibilityEvent(event); 4676 } 4677 // In the beginning we called #isShown(), so we know that getParent() is not null. 4678 getParent().requestSendAccessibilityEvent(this, event); 4679 } 4680 4681 /** 4682 * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then 4683 * to its children for adding their text content to the event. Note that the 4684 * event text is populated in a separate dispatch path since we add to the 4685 * event not only the text of the source but also the text of all its descendants. 4686 * A typical implementation will call 4687 * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view 4688 * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 4689 * on each child. Override this method if custom population of the event text 4690 * content is required. 4691 * <p> 4692 * If an {@link AccessibilityDelegate} has been specified via calling 4693 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4694 * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} 4695 * is responsible for handling this call. 4696 * </p> 4697 * <p> 4698 * <em>Note:</em> Accessibility events of certain types are not dispatched for 4699 * populating the event text via this method. For details refer to {@link AccessibilityEvent}. 4700 * </p> 4701 * 4702 * @param event The event. 4703 * 4704 * @return True if the event population was completed. 4705 */ 4706 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 4707 if (mAccessibilityDelegate != null) { 4708 return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); 4709 } else { 4710 return dispatchPopulateAccessibilityEventInternal(event); 4711 } 4712 } 4713 4714 /** 4715 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 4716 * 4717 * Note: Called from the default {@link AccessibilityDelegate}. 4718 */ 4719 boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { 4720 onPopulateAccessibilityEvent(event); 4721 return false; 4722 } 4723 4724 /** 4725 * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 4726 * giving a chance to this View to populate the accessibility event with its 4727 * text content. While this method is free to modify event 4728 * attributes other than text content, doing so should normally be performed in 4729 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. 4730 * <p> 4731 * Example: Adding formatted date string to an accessibility event in addition 4732 * to the text added by the super implementation: 4733 * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 4734 * super.onPopulateAccessibilityEvent(event); 4735 * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; 4736 * String selectedDateUtterance = DateUtils.formatDateTime(mContext, 4737 * mCurrentDate.getTimeInMillis(), flags); 4738 * event.getText().add(selectedDateUtterance); 4739 * }</pre> 4740 * <p> 4741 * If an {@link AccessibilityDelegate} has been specified via calling 4742 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4743 * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} 4744 * is responsible for handling this call. 4745 * </p> 4746 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 4747 * information to the event, in case the default implementation has basic information to add. 4748 * </p> 4749 * 4750 * @param event The accessibility event which to populate. 4751 * 4752 * @see #sendAccessibilityEvent(int) 4753 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 4754 */ 4755 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 4756 if (mAccessibilityDelegate != null) { 4757 mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); 4758 } else { 4759 onPopulateAccessibilityEventInternal(event); 4760 } 4761 } 4762 4763 /** 4764 * @see #onPopulateAccessibilityEvent(AccessibilityEvent) 4765 * 4766 * Note: Called from the default {@link AccessibilityDelegate}. 4767 */ 4768 void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { 4769 4770 } 4771 4772 /** 4773 * Initializes an {@link AccessibilityEvent} with information about 4774 * this View which is the event source. In other words, the source of 4775 * an accessibility event is the view whose state change triggered firing 4776 * the event. 4777 * <p> 4778 * Example: Setting the password property of an event in addition 4779 * to properties set by the super implementation: 4780 * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 4781 * super.onInitializeAccessibilityEvent(event); 4782 * event.setPassword(true); 4783 * }</pre> 4784 * <p> 4785 * If an {@link AccessibilityDelegate} has been specified via calling 4786 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4787 * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} 4788 * is responsible for handling this call. 4789 * </p> 4790 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 4791 * information to the event, in case the default implementation has basic information to add. 4792 * </p> 4793 * @param event The event to initialize. 4794 * 4795 * @see #sendAccessibilityEvent(int) 4796 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 4797 */ 4798 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 4799 if (mAccessibilityDelegate != null) { 4800 mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); 4801 } else { 4802 onInitializeAccessibilityEventInternal(event); 4803 } 4804 } 4805 4806 /** 4807 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 4808 * 4809 * Note: Called from the default {@link AccessibilityDelegate}. 4810 */ 4811 void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 4812 event.setSource(this); 4813 event.setClassName(View.class.getName()); 4814 event.setPackageName(getContext().getPackageName()); 4815 event.setEnabled(isEnabled()); 4816 event.setContentDescription(mContentDescription); 4817 4818 if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED && mAttachInfo != null) { 4819 ArrayList<View> focusablesTempList = mAttachInfo.mTempArrayList; 4820 getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, 4821 FOCUSABLES_ALL); 4822 event.setItemCount(focusablesTempList.size()); 4823 event.setCurrentItemIndex(focusablesTempList.indexOf(this)); 4824 focusablesTempList.clear(); 4825 } 4826 } 4827 4828 /** 4829 * Returns an {@link AccessibilityNodeInfo} representing this view from the 4830 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 4831 * This method is responsible for obtaining an accessibility node info from a 4832 * pool of reusable instances and calling 4833 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to 4834 * initialize the former. 4835 * <p> 4836 * Note: The client is responsible for recycling the obtained instance by calling 4837 * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. 4838 * </p> 4839 * 4840 * @return A populated {@link AccessibilityNodeInfo}. 4841 * 4842 * @see AccessibilityNodeInfo 4843 */ 4844 public AccessibilityNodeInfo createAccessibilityNodeInfo() { 4845 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 4846 if (provider != null) { 4847 return provider.createAccessibilityNodeInfo(View.NO_ID); 4848 } else { 4849 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); 4850 onInitializeAccessibilityNodeInfo(info); 4851 return info; 4852 } 4853 } 4854 4855 /** 4856 * Initializes an {@link AccessibilityNodeInfo} with information about this view. 4857 * The base implementation sets: 4858 * <ul> 4859 * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> 4860 * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> 4861 * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> 4862 * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> 4863 * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> 4864 * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> 4865 * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> 4866 * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> 4867 * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> 4868 * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> 4869 * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> 4870 * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> 4871 * </ul> 4872 * <p> 4873 * Subclasses should override this method, call the super implementation, 4874 * and set additional attributes. 4875 * </p> 4876 * <p> 4877 * If an {@link AccessibilityDelegate} has been specified via calling 4878 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 4879 * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} 4880 * is responsible for handling this call. 4881 * </p> 4882 * 4883 * @param info The instance to initialize. 4884 */ 4885 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 4886 if (mAccessibilityDelegate != null) { 4887 mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); 4888 } else { 4889 onInitializeAccessibilityNodeInfoInternal(info); 4890 } 4891 } 4892 4893 /** 4894 * Gets the location of this view in screen coordintates. 4895 * 4896 * @param outRect The output location 4897 */ 4898 private void getBoundsOnScreen(Rect outRect) { 4899 if (mAttachInfo == null) { 4900 return; 4901 } 4902 4903 RectF position = mAttachInfo.mTmpTransformRect; 4904 position.set(0, 0, mRight - mLeft, mBottom - mTop); 4905 4906 if (!hasIdentityMatrix()) { 4907 getMatrix().mapRect(position); 4908 } 4909 4910 position.offset(mLeft, mTop); 4911 4912 ViewParent parent = mParent; 4913 while (parent instanceof View) { 4914 View parentView = (View) parent; 4915 4916 position.offset(-parentView.mScrollX, -parentView.mScrollY); 4917 4918 if (!parentView.hasIdentityMatrix()) { 4919 parentView.getMatrix().mapRect(position); 4920 } 4921 4922 position.offset(parentView.mLeft, parentView.mTop); 4923 4924 parent = parentView.mParent; 4925 } 4926 4927 if (parent instanceof ViewRootImpl) { 4928 ViewRootImpl viewRootImpl = (ViewRootImpl) parent; 4929 position.offset(0, -viewRootImpl.mCurScrollY); 4930 } 4931 4932 position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 4933 4934 outRect.set((int) (position.left + 0.5f), (int) (position.top + 0.5f), 4935 (int) (position.right + 0.5f), (int) (position.bottom + 0.5f)); 4936 } 4937 4938 /** 4939 * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 4940 * 4941 * Note: Called from the default {@link AccessibilityDelegate}. 4942 */ 4943 void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 4944 Rect bounds = mAttachInfo.mTmpInvalRect; 4945 4946 getDrawingRect(bounds); 4947 info.setBoundsInParent(bounds); 4948 4949 getBoundsOnScreen(bounds); 4950 info.setBoundsInScreen(bounds); 4951 4952 ViewParent parent = getParentForAccessibility(); 4953 if (parent instanceof View) { 4954 info.setParent((View) parent); 4955 } 4956 4957 if (mID != View.NO_ID) { 4958 View rootView = getRootView(); 4959 if (rootView == null) { 4960 rootView = this; 4961 } 4962 View label = rootView.findLabelForView(this, mID); 4963 if (label != null) { 4964 info.setLabeledBy(label); 4965 } 4966 } 4967 4968 if (mLabelForId != View.NO_ID) { 4969 View rootView = getRootView(); 4970 if (rootView == null) { 4971 rootView = this; 4972 } 4973 View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); 4974 if (labeled != null) { 4975 info.setLabelFor(labeled); 4976 } 4977 } 4978 4979 info.setVisibleToUser(isVisibleToUser()); 4980 4981 info.setPackageName(mContext.getPackageName()); 4982 info.setClassName(View.class.getName()); 4983 info.setContentDescription(getContentDescription()); 4984 4985 info.setEnabled(isEnabled()); 4986 info.setClickable(isClickable()); 4987 info.setFocusable(isFocusable()); 4988 info.setFocused(isFocused()); 4989 info.setAccessibilityFocused(isAccessibilityFocused()); 4990 info.setSelected(isSelected()); 4991 info.setLongClickable(isLongClickable()); 4992 4993 // TODO: These make sense only if we are in an AdapterView but all 4994 // views can be selected. Maybe from accessibility perspective 4995 // we should report as selectable view in an AdapterView. 4996 info.addAction(AccessibilityNodeInfo.ACTION_SELECT); 4997 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); 4998 4999 if (isFocusable()) { 5000 if (isFocused()) { 5001 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); 5002 } else { 5003 info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); 5004 } 5005 } 5006 5007 if (!isAccessibilityFocused()) { 5008 info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); 5009 } else { 5010 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 5011 } 5012 5013 if (isClickable() && isEnabled()) { 5014 info.addAction(AccessibilityNodeInfo.ACTION_CLICK); 5015 } 5016 5017 if (isLongClickable() && isEnabled()) { 5018 info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); 5019 } 5020 5021 if (mContentDescription != null && mContentDescription.length() > 0) { 5022 info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY); 5023 info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY); 5024 info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER 5025 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD 5026 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH); 5027 } 5028 } 5029 5030 private View findLabelForView(View view, int labeledId) { 5031 if (mMatchLabelForPredicate == null) { 5032 mMatchLabelForPredicate = new MatchLabelForPredicate(); 5033 } 5034 mMatchLabelForPredicate.mLabeledId = labeledId; 5035 return findViewByPredicateInsideOut(view, mMatchLabelForPredicate); 5036 } 5037 5038 /** 5039 * Computes whether this view is visible to the user. Such a view is 5040 * attached, visible, all its predecessors are visible, it is not clipped 5041 * entirely by its predecessors, and has an alpha greater than zero. 5042 * 5043 * @return Whether the view is visible on the screen. 5044 * 5045 * @hide 5046 */ 5047 protected boolean isVisibleToUser() { 5048 return isVisibleToUser(null); 5049 } 5050 5051 /** 5052 * Computes whether the given portion of this view is visible to the user. 5053 * Such a view is attached, visible, all its predecessors are visible, 5054 * has an alpha greater than zero, and the specified portion is not 5055 * clipped entirely by its predecessors. 5056 * 5057 * @param boundInView the portion of the view to test; coordinates should be relative; may be 5058 * <code>null</code>, and the entire view will be tested in this case. 5059 * When <code>true</code> is returned by the function, the actual visible 5060 * region will be stored in this parameter; that is, if boundInView is fully 5061 * contained within the view, no modification will be made, otherwise regions 5062 * outside of the visible area of the view will be clipped. 5063 * 5064 * @return Whether the specified portion of the view is visible on the screen. 5065 * 5066 * @hide 5067 */ 5068 protected boolean isVisibleToUser(Rect boundInView) { 5069 if (mAttachInfo != null) { 5070 Rect visibleRect = mAttachInfo.mTmpInvalRect; 5071 Point offset = mAttachInfo.mPoint; 5072 // The first two checks are made also made by isShown() which 5073 // however traverses the tree up to the parent to catch that. 5074 // Therefore, we do some fail fast check to minimize the up 5075 // tree traversal. 5076 boolean isVisible = mAttachInfo.mWindowVisibility == View.VISIBLE 5077 && getAlpha() > 0 5078 && isShown() 5079 && getGlobalVisibleRect(visibleRect, offset); 5080 if (isVisible && boundInView != null) { 5081 visibleRect.offset(-offset.x, -offset.y); 5082 // isVisible is always true here, use a simple assignment 5083 isVisible = boundInView.intersect(visibleRect); 5084 } 5085 return isVisible; 5086 } 5087 5088 return false; 5089 } 5090 5091 /** 5092 * Returns the delegate for implementing accessibility support via 5093 * composition. For more details see {@link AccessibilityDelegate}. 5094 * 5095 * @return The delegate, or null if none set. 5096 * 5097 * @hide 5098 */ 5099 public AccessibilityDelegate getAccessibilityDelegate() { 5100 return mAccessibilityDelegate; 5101 } 5102 5103 /** 5104 * Sets a delegate for implementing accessibility support via composition as 5105 * opposed to inheritance. The delegate's primary use is for implementing 5106 * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. 5107 * 5108 * @param delegate The delegate instance. 5109 * 5110 * @see AccessibilityDelegate 5111 */ 5112 public void setAccessibilityDelegate(AccessibilityDelegate delegate) { 5113 mAccessibilityDelegate = delegate; 5114 } 5115 5116 /** 5117 * Gets the provider for managing a virtual view hierarchy rooted at this View 5118 * and reported to {@link android.accessibilityservice.AccessibilityService}s 5119 * that explore the window content. 5120 * <p> 5121 * If this method returns an instance, this instance is responsible for managing 5122 * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this 5123 * View including the one representing the View itself. Similarly the returned 5124 * instance is responsible for performing accessibility actions on any virtual 5125 * view or the root view itself. 5126 * </p> 5127 * <p> 5128 * If an {@link AccessibilityDelegate} has been specified via calling 5129 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5130 * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} 5131 * is responsible for handling this call. 5132 * </p> 5133 * 5134 * @return The provider. 5135 * 5136 * @see AccessibilityNodeProvider 5137 */ 5138 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 5139 if (mAccessibilityDelegate != null) { 5140 return mAccessibilityDelegate.getAccessibilityNodeProvider(this); 5141 } else { 5142 return null; 5143 } 5144 } 5145 5146 /** 5147 * Gets the unique identifier of this view on the screen for accessibility purposes. 5148 * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. 5149 * 5150 * @return The view accessibility id. 5151 * 5152 * @hide 5153 */ 5154 public int getAccessibilityViewId() { 5155 if (mAccessibilityViewId == NO_ID) { 5156 mAccessibilityViewId = sNextAccessibilityViewId++; 5157 } 5158 return mAccessibilityViewId; 5159 } 5160 5161 /** 5162 * Gets the unique identifier of the window in which this View reseides. 5163 * 5164 * @return The window accessibility id. 5165 * 5166 * @hide 5167 */ 5168 public int getAccessibilityWindowId() { 5169 return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId : NO_ID; 5170 } 5171 5172 /** 5173 * Gets the {@link View} description. It briefly describes the view and is 5174 * primarily used for accessibility support. Set this property to enable 5175 * better accessibility support for your application. This is especially 5176 * true for views that do not have textual representation (For example, 5177 * ImageButton). 5178 * 5179 * @return The content description. 5180 * 5181 * @attr ref android.R.styleable#View_contentDescription 5182 */ 5183 @ViewDebug.ExportedProperty(category = "accessibility") 5184 public CharSequence getContentDescription() { 5185 return mContentDescription; 5186 } 5187 5188 /** 5189 * Sets the {@link View} description. It briefly describes the view and is 5190 * primarily used for accessibility support. Set this property to enable 5191 * better accessibility support for your application. This is especially 5192 * true for views that do not have textual representation (For example, 5193 * ImageButton). 5194 * 5195 * @param contentDescription The content description. 5196 * 5197 * @attr ref android.R.styleable#View_contentDescription 5198 */ 5199 @RemotableViewMethod 5200 public void setContentDescription(CharSequence contentDescription) { 5201 mContentDescription = contentDescription; 5202 final boolean nonEmptyDesc = contentDescription != null && contentDescription.length() > 0; 5203 if (nonEmptyDesc && getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 5204 setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); 5205 } 5206 } 5207 5208 /** 5209 * Gets the id of a view for which this view serves as a label for 5210 * accessibility purposes. 5211 * 5212 * @return The labeled view id. 5213 */ 5214 @ViewDebug.ExportedProperty(category = "accessibility") 5215 public int getLabelFor() { 5216 return mLabelForId; 5217 } 5218 5219 /** 5220 * Sets the id of a view for which this view serves as a label for 5221 * accessibility purposes. 5222 * 5223 * @param id The labeled view id. 5224 */ 5225 @RemotableViewMethod 5226 public void setLabelFor(int id) { 5227 mLabelForId = id; 5228 if (mLabelForId != View.NO_ID 5229 && mID == View.NO_ID) { 5230 mID = generateViewId(); 5231 } 5232 } 5233 5234 /** 5235 * Invoked whenever this view loses focus, either by losing window focus or by losing 5236 * focus within its window. This method can be used to clear any state tied to the 5237 * focus. For instance, if a button is held pressed with the trackball and the window 5238 * loses focus, this method can be used to cancel the press. 5239 * 5240 * Subclasses of View overriding this method should always call super.onFocusLost(). 5241 * 5242 * @see #onFocusChanged(boolean, int, android.graphics.Rect) 5243 * @see #onWindowFocusChanged(boolean) 5244 * 5245 * @hide pending API council approval 5246 */ 5247 protected void onFocusLost() { 5248 resetPressedState(); 5249 } 5250 5251 private void resetPressedState() { 5252 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 5253 return; 5254 } 5255 5256 if (isPressed()) { 5257 setPressed(false); 5258 5259 if (!mHasPerformedLongPress) { 5260 removeLongPressCallback(); 5261 } 5262 } 5263 } 5264 5265 /** 5266 * Returns true if this view has focus 5267 * 5268 * @return True if this view has focus, false otherwise. 5269 */ 5270 @ViewDebug.ExportedProperty(category = "focus") 5271 public boolean isFocused() { 5272 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 5273 } 5274 5275 /** 5276 * Find the view in the hierarchy rooted at this view that currently has 5277 * focus. 5278 * 5279 * @return The view that currently has focus, or null if no focused view can 5280 * be found. 5281 */ 5282 public View findFocus() { 5283 return (mPrivateFlags & PFLAG_FOCUSED) != 0 ? this : null; 5284 } 5285 5286 /** 5287 * Indicates whether this view is one of the set of scrollable containers in 5288 * its window. 5289 * 5290 * @return whether this view is one of the set of scrollable containers in 5291 * its window 5292 * 5293 * @attr ref android.R.styleable#View_isScrollContainer 5294 */ 5295 public boolean isScrollContainer() { 5296 return (mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0; 5297 } 5298 5299 /** 5300 * Change whether this view is one of the set of scrollable containers in 5301 * its window. This will be used to determine whether the window can 5302 * resize or must pan when a soft input area is open -- scrollable 5303 * containers allow the window to use resize mode since the container 5304 * will appropriately shrink. 5305 * 5306 * @attr ref android.R.styleable#View_isScrollContainer 5307 */ 5308 public void setScrollContainer(boolean isScrollContainer) { 5309 if (isScrollContainer) { 5310 if (mAttachInfo != null && (mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) == 0) { 5311 mAttachInfo.mScrollContainers.add(this); 5312 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 5313 } 5314 mPrivateFlags |= PFLAG_SCROLL_CONTAINER; 5315 } else { 5316 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 5317 mAttachInfo.mScrollContainers.remove(this); 5318 } 5319 mPrivateFlags &= ~(PFLAG_SCROLL_CONTAINER|PFLAG_SCROLL_CONTAINER_ADDED); 5320 } 5321 } 5322 5323 /** 5324 * Returns the quality of the drawing cache. 5325 * 5326 * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 5327 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 5328 * 5329 * @see #setDrawingCacheQuality(int) 5330 * @see #setDrawingCacheEnabled(boolean) 5331 * @see #isDrawingCacheEnabled() 5332 * 5333 * @attr ref android.R.styleable#View_drawingCacheQuality 5334 */ 5335 public int getDrawingCacheQuality() { 5336 return mViewFlags & DRAWING_CACHE_QUALITY_MASK; 5337 } 5338 5339 /** 5340 * Set the drawing cache quality of this view. This value is used only when the 5341 * drawing cache is enabled 5342 * 5343 * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 5344 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 5345 * 5346 * @see #getDrawingCacheQuality() 5347 * @see #setDrawingCacheEnabled(boolean) 5348 * @see #isDrawingCacheEnabled() 5349 * 5350 * @attr ref android.R.styleable#View_drawingCacheQuality 5351 */ 5352 public void setDrawingCacheQuality(int quality) { 5353 setFlags(quality, DRAWING_CACHE_QUALITY_MASK); 5354 } 5355 5356 /** 5357 * Returns whether the screen should remain on, corresponding to the current 5358 * value of {@link #KEEP_SCREEN_ON}. 5359 * 5360 * @return Returns true if {@link #KEEP_SCREEN_ON} is set. 5361 * 5362 * @see #setKeepScreenOn(boolean) 5363 * 5364 * @attr ref android.R.styleable#View_keepScreenOn 5365 */ 5366 public boolean getKeepScreenOn() { 5367 return (mViewFlags & KEEP_SCREEN_ON) != 0; 5368 } 5369 5370 /** 5371 * Controls whether the screen should remain on, modifying the 5372 * value of {@link #KEEP_SCREEN_ON}. 5373 * 5374 * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. 5375 * 5376 * @see #getKeepScreenOn() 5377 * 5378 * @attr ref android.R.styleable#View_keepScreenOn 5379 */ 5380 public void setKeepScreenOn(boolean keepScreenOn) { 5381 setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); 5382 } 5383 5384 /** 5385 * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 5386 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5387 * 5388 * @attr ref android.R.styleable#View_nextFocusLeft 5389 */ 5390 public int getNextFocusLeftId() { 5391 return mNextFocusLeftId; 5392 } 5393 5394 /** 5395 * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 5396 * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should 5397 * decide automatically. 5398 * 5399 * @attr ref android.R.styleable#View_nextFocusLeft 5400 */ 5401 public void setNextFocusLeftId(int nextFocusLeftId) { 5402 mNextFocusLeftId = nextFocusLeftId; 5403 } 5404 5405 /** 5406 * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 5407 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5408 * 5409 * @attr ref android.R.styleable#View_nextFocusRight 5410 */ 5411 public int getNextFocusRightId() { 5412 return mNextFocusRightId; 5413 } 5414 5415 /** 5416 * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 5417 * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should 5418 * decide automatically. 5419 * 5420 * @attr ref android.R.styleable#View_nextFocusRight 5421 */ 5422 public void setNextFocusRightId(int nextFocusRightId) { 5423 mNextFocusRightId = nextFocusRightId; 5424 } 5425 5426 /** 5427 * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. 5428 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5429 * 5430 * @attr ref android.R.styleable#View_nextFocusUp 5431 */ 5432 public int getNextFocusUpId() { 5433 return mNextFocusUpId; 5434 } 5435 5436 /** 5437 * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. 5438 * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should 5439 * decide automatically. 5440 * 5441 * @attr ref android.R.styleable#View_nextFocusUp 5442 */ 5443 public void setNextFocusUpId(int nextFocusUpId) { 5444 mNextFocusUpId = nextFocusUpId; 5445 } 5446 5447 /** 5448 * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 5449 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5450 * 5451 * @attr ref android.R.styleable#View_nextFocusDown 5452 */ 5453 public int getNextFocusDownId() { 5454 return mNextFocusDownId; 5455 } 5456 5457 /** 5458 * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 5459 * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should 5460 * decide automatically. 5461 * 5462 * @attr ref android.R.styleable#View_nextFocusDown 5463 */ 5464 public void setNextFocusDownId(int nextFocusDownId) { 5465 mNextFocusDownId = nextFocusDownId; 5466 } 5467 5468 /** 5469 * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 5470 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 5471 * 5472 * @attr ref android.R.styleable#View_nextFocusForward 5473 */ 5474 public int getNextFocusForwardId() { 5475 return mNextFocusForwardId; 5476 } 5477 5478 /** 5479 * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 5480 * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should 5481 * decide automatically. 5482 * 5483 * @attr ref android.R.styleable#View_nextFocusForward 5484 */ 5485 public void setNextFocusForwardId(int nextFocusForwardId) { 5486 mNextFocusForwardId = nextFocusForwardId; 5487 } 5488 5489 /** 5490 * Returns the visibility of this view and all of its ancestors 5491 * 5492 * @return True if this view and all of its ancestors are {@link #VISIBLE} 5493 */ 5494 public boolean isShown() { 5495 View current = this; 5496 //noinspection ConstantConditions 5497 do { 5498 if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { 5499 return false; 5500 } 5501 ViewParent parent = current.mParent; 5502 if (parent == null) { 5503 return false; // We are not attached to the view root 5504 } 5505 if (!(parent instanceof View)) { 5506 return true; 5507 } 5508 current = (View) parent; 5509 } while (current != null); 5510 5511 return false; 5512 } 5513 5514 /** 5515 * Called by the view hierarchy when the content insets for a window have 5516 * changed, to allow it to adjust its content to fit within those windows. 5517 * The content insets tell you the space that the status bar, input method, 5518 * and other system windows infringe on the application's window. 5519 * 5520 * <p>You do not normally need to deal with this function, since the default 5521 * window decoration given to applications takes care of applying it to the 5522 * content of the window. If you use {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 5523 * or {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} this will not be the case, 5524 * and your content can be placed under those system elements. You can then 5525 * use this method within your view hierarchy if you have parts of your UI 5526 * which you would like to ensure are not being covered. 5527 * 5528 * <p>The default implementation of this method simply applies the content 5529 * inset's to the view's padding, consuming that content (modifying the 5530 * insets to be 0), and returning true. This behavior is off by default, but can 5531 * be enabled through {@link #setFitsSystemWindows(boolean)}. 5532 * 5533 * <p>This function's traversal down the hierarchy is depth-first. The same content 5534 * insets object is propagated down the hierarchy, so any changes made to it will 5535 * be seen by all following views (including potentially ones above in 5536 * the hierarchy since this is a depth-first traversal). The first view 5537 * that returns true will abort the entire traversal. 5538 * 5539 * <p>The default implementation works well for a situation where it is 5540 * used with a container that covers the entire window, allowing it to 5541 * apply the appropriate insets to its content on all edges. If you need 5542 * a more complicated layout (such as two different views fitting system 5543 * windows, one on the top of the window, and one on the bottom), 5544 * you can override the method and handle the insets however you would like. 5545 * Note that the insets provided by the framework are always relative to the 5546 * far edges of the window, not accounting for the location of the called view 5547 * within that window. (In fact when this method is called you do not yet know 5548 * where the layout will place the view, as it is done before layout happens.) 5549 * 5550 * <p>Note: unlike many View methods, there is no dispatch phase to this 5551 * call. If you are overriding it in a ViewGroup and want to allow the 5552 * call to continue to your children, you must be sure to call the super 5553 * implementation. 5554 * 5555 * <p>Here is a sample layout that makes use of fitting system windows 5556 * to have controls for a video view placed inside of the window decorations 5557 * that it hides and shows. This can be used with code like the second 5558 * sample (video player) shown in {@link #setSystemUiVisibility(int)}. 5559 * 5560 * {@sample development/samples/ApiDemos/res/layout/video_player.xml complete} 5561 * 5562 * @param insets Current content insets of the window. Prior to 5563 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN} you must not modify 5564 * the insets or else you and Android will be unhappy. 5565 * 5566 * @return Return true if this view applied the insets and it should not 5567 * continue propagating further down the hierarchy, false otherwise. 5568 * @see #getFitsSystemWindows() 5569 * @see #setFitsSystemWindows(boolean) 5570 * @see #setSystemUiVisibility(int) 5571 */ 5572 protected boolean fitSystemWindows(Rect insets) { 5573 if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { 5574 mUserPaddingStart = UNDEFINED_PADDING; 5575 mUserPaddingEnd = UNDEFINED_PADDING; 5576 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 5577 || mAttachInfo == null 5578 || (mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0) { 5579 internalSetPadding(insets.left, insets.top, insets.right, insets.bottom); 5580 return true; 5581 } else { 5582 internalSetPadding(0, 0, 0, 0); 5583 return false; 5584 } 5585 } 5586 return false; 5587 } 5588 5589 /** 5590 * Sets whether or not this view should account for system screen decorations 5591 * such as the status bar and inset its content; that is, controlling whether 5592 * the default implementation of {@link #fitSystemWindows(Rect)} will be 5593 * executed. See that method for more details. 5594 * 5595 * <p>Note that if you are providing your own implementation of 5596 * {@link #fitSystemWindows(Rect)}, then there is no need to set this 5597 * flag to true -- your implementation will be overriding the default 5598 * implementation that checks this flag. 5599 * 5600 * @param fitSystemWindows If true, then the default implementation of 5601 * {@link #fitSystemWindows(Rect)} will be executed. 5602 * 5603 * @attr ref android.R.styleable#View_fitsSystemWindows 5604 * @see #getFitsSystemWindows() 5605 * @see #fitSystemWindows(Rect) 5606 * @see #setSystemUiVisibility(int) 5607 */ 5608 public void setFitsSystemWindows(boolean fitSystemWindows) { 5609 setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); 5610 } 5611 5612 /** 5613 * Check for state of {@link #setFitsSystemWindows(boolean). If this method 5614 * returns true, the default implementation of {@link #fitSystemWindows(Rect)} 5615 * will be executed. 5616 * 5617 * @return Returns true if the default implementation of 5618 * {@link #fitSystemWindows(Rect)} will be executed. 5619 * 5620 * @attr ref android.R.styleable#View_fitsSystemWindows 5621 * @see #setFitsSystemWindows() 5622 * @see #fitSystemWindows(Rect) 5623 * @see #setSystemUiVisibility(int) 5624 */ 5625 public boolean getFitsSystemWindows() { 5626 return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; 5627 } 5628 5629 /** @hide */ 5630 public boolean fitsSystemWindows() { 5631 return getFitsSystemWindows(); 5632 } 5633 5634 /** 5635 * Ask that a new dispatch of {@link #fitSystemWindows(Rect)} be performed. 5636 */ 5637 public void requestFitSystemWindows() { 5638 if (mParent != null) { 5639 mParent.requestFitSystemWindows(); 5640 } 5641 } 5642 5643 /** 5644 * For use by PhoneWindow to make its own system window fitting optional. 5645 * @hide 5646 */ 5647 public void makeOptionalFitsSystemWindows() { 5648 setFlags(OPTIONAL_FITS_SYSTEM_WINDOWS, OPTIONAL_FITS_SYSTEM_WINDOWS); 5649 } 5650 5651 /** 5652 * Returns the visibility status for this view. 5653 * 5654 * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 5655 * @attr ref android.R.styleable#View_visibility 5656 */ 5657 @ViewDebug.ExportedProperty(mapping = { 5658 @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), 5659 @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), 5660 @ViewDebug.IntToString(from = GONE, to = "GONE") 5661 }) 5662 public int getVisibility() { 5663 return mViewFlags & VISIBILITY_MASK; 5664 } 5665 5666 /** 5667 * Set the enabled state of this view. 5668 * 5669 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 5670 * @attr ref android.R.styleable#View_visibility 5671 */ 5672 @RemotableViewMethod 5673 public void setVisibility(int visibility) { 5674 setFlags(visibility, VISIBILITY_MASK); 5675 if (mBackground != null) mBackground.setVisible(visibility == VISIBLE, false); 5676 } 5677 5678 /** 5679 * Returns the enabled status for this view. The interpretation of the 5680 * enabled state varies by subclass. 5681 * 5682 * @return True if this view is enabled, false otherwise. 5683 */ 5684 @ViewDebug.ExportedProperty 5685 public boolean isEnabled() { 5686 return (mViewFlags & ENABLED_MASK) == ENABLED; 5687 } 5688 5689 /** 5690 * Set the enabled state of this view. The interpretation of the enabled 5691 * state varies by subclass. 5692 * 5693 * @param enabled True if this view is enabled, false otherwise. 5694 */ 5695 @RemotableViewMethod 5696 public void setEnabled(boolean enabled) { 5697 if (enabled == isEnabled()) return; 5698 5699 setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); 5700 5701 /* 5702 * The View most likely has to change its appearance, so refresh 5703 * the drawable state. 5704 */ 5705 refreshDrawableState(); 5706 5707 // Invalidate too, since the default behavior for views is to be 5708 // be drawn at 50% alpha rather than to change the drawable. 5709 invalidate(true); 5710 } 5711 5712 /** 5713 * Set whether this view can receive the focus. 5714 * 5715 * Setting this to false will also ensure that this view is not focusable 5716 * in touch mode. 5717 * 5718 * @param focusable If true, this view can receive the focus. 5719 * 5720 * @see #setFocusableInTouchMode(boolean) 5721 * @attr ref android.R.styleable#View_focusable 5722 */ 5723 public void setFocusable(boolean focusable) { 5724 if (!focusable) { 5725 setFlags(0, FOCUSABLE_IN_TOUCH_MODE); 5726 } 5727 setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); 5728 } 5729 5730 /** 5731 * Set whether this view can receive focus while in touch mode. 5732 * 5733 * Setting this to true will also ensure that this view is focusable. 5734 * 5735 * @param focusableInTouchMode If true, this view can receive the focus while 5736 * in touch mode. 5737 * 5738 * @see #setFocusable(boolean) 5739 * @attr ref android.R.styleable#View_focusableInTouchMode 5740 */ 5741 public void setFocusableInTouchMode(boolean focusableInTouchMode) { 5742 // Focusable in touch mode should always be set before the focusable flag 5743 // otherwise, setting the focusable flag will trigger a focusableViewAvailable() 5744 // which, in touch mode, will not successfully request focus on this view 5745 // because the focusable in touch mode flag is not set 5746 setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); 5747 if (focusableInTouchMode) { 5748 setFlags(FOCUSABLE, FOCUSABLE_MASK); 5749 } 5750 } 5751 5752 /** 5753 * Set whether this view should have sound effects enabled for events such as 5754 * clicking and touching. 5755 * 5756 * <p>You may wish to disable sound effects for a view if you already play sounds, 5757 * for instance, a dial key that plays dtmf tones. 5758 * 5759 * @param soundEffectsEnabled whether sound effects are enabled for this view. 5760 * @see #isSoundEffectsEnabled() 5761 * @see #playSoundEffect(int) 5762 * @attr ref android.R.styleable#View_soundEffectsEnabled 5763 */ 5764 public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { 5765 setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); 5766 } 5767 5768 /** 5769 * @return whether this view should have sound effects enabled for events such as 5770 * clicking and touching. 5771 * 5772 * @see #setSoundEffectsEnabled(boolean) 5773 * @see #playSoundEffect(int) 5774 * @attr ref android.R.styleable#View_soundEffectsEnabled 5775 */ 5776 @ViewDebug.ExportedProperty 5777 public boolean isSoundEffectsEnabled() { 5778 return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); 5779 } 5780 5781 /** 5782 * Set whether this view should have haptic feedback for events such as 5783 * long presses. 5784 * 5785 * <p>You may wish to disable haptic feedback if your view already controls 5786 * its own haptic feedback. 5787 * 5788 * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. 5789 * @see #isHapticFeedbackEnabled() 5790 * @see #performHapticFeedback(int) 5791 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 5792 */ 5793 public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { 5794 setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); 5795 } 5796 5797 /** 5798 * @return whether this view should have haptic feedback enabled for events 5799 * long presses. 5800 * 5801 * @see #setHapticFeedbackEnabled(boolean) 5802 * @see #performHapticFeedback(int) 5803 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 5804 */ 5805 @ViewDebug.ExportedProperty 5806 public boolean isHapticFeedbackEnabled() { 5807 return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); 5808 } 5809 5810 /** 5811 * Returns the layout direction for this view. 5812 * 5813 * @return One of {@link #LAYOUT_DIRECTION_LTR}, 5814 * {@link #LAYOUT_DIRECTION_RTL}, 5815 * {@link #LAYOUT_DIRECTION_INHERIT} or 5816 * {@link #LAYOUT_DIRECTION_LOCALE}. 5817 * @attr ref android.R.styleable#View_layoutDirection 5818 * 5819 * @hide 5820 */ 5821 @ViewDebug.ExportedProperty(category = "layout", mapping = { 5822 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), 5823 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), 5824 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), 5825 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") 5826 }) 5827 public int getRawLayoutDirection() { 5828 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 5829 } 5830 5831 /** 5832 * Set the layout direction for this view. This will propagate a reset of layout direction 5833 * resolution to the view's children and resolve layout direction for this view. 5834 * 5835 * @param layoutDirection the layout direction to set. Should be one of: 5836 * 5837 * {@link #LAYOUT_DIRECTION_LTR}, 5838 * {@link #LAYOUT_DIRECTION_RTL}, 5839 * {@link #LAYOUT_DIRECTION_INHERIT}, 5840 * {@link #LAYOUT_DIRECTION_LOCALE}. 5841 * 5842 * Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution 5843 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 5844 * will return the default {@link #LAYOUT_DIRECTION_LTR}. 5845 * 5846 * @attr ref android.R.styleable#View_layoutDirection 5847 */ 5848 @RemotableViewMethod 5849 public void setLayoutDirection(int layoutDirection) { 5850 if (getRawLayoutDirection() != layoutDirection) { 5851 // Reset the current layout direction and the resolved one 5852 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_MASK; 5853 resetRtlProperties(); 5854 // Set the new layout direction (filtered) 5855 mPrivateFlags2 |= 5856 ((layoutDirection << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) & PFLAG2_LAYOUT_DIRECTION_MASK); 5857 // We need to resolve all RTL properties as they all depend on layout direction 5858 resolveRtlPropertiesIfNeeded(); 5859 } 5860 } 5861 5862 /** 5863 * Returns the resolved layout direction for this view. 5864 * 5865 * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns 5866 * {@link #LAYOUT_DIRECTION_LTR} if the layout direction is not RTL. 5867 * 5868 * For compatibility, this will return {@link #LAYOUT_DIRECTION_LTR} if API version 5869 * is lower than {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}. 5870 */ 5871 @ViewDebug.ExportedProperty(category = "layout", mapping = { 5872 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), 5873 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") 5874 }) 5875 public int getLayoutDirection() { 5876 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 5877 if (targetSdkVersion < JELLY_BEAN_MR1) { 5878 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 5879 return LAYOUT_DIRECTION_LTR; 5880 } 5881 return ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) == 5882 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) ? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; 5883 } 5884 5885 /** 5886 * Indicates whether or not this view's layout is right-to-left. This is resolved from 5887 * layout attribute and/or the inherited value from the parent 5888 * 5889 * @return true if the layout is right-to-left. 5890 * 5891 * @hide 5892 */ 5893 @ViewDebug.ExportedProperty(category = "layout") 5894 public boolean isLayoutRtl() { 5895 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 5896 } 5897 5898 /** 5899 * Indicates whether the view is currently tracking transient state that the 5900 * app should not need to concern itself with saving and restoring, but that 5901 * the framework should take special note to preserve when possible. 5902 * 5903 * <p>A view with transient state cannot be trivially rebound from an external 5904 * data source, such as an adapter binding item views in a list. This may be 5905 * because the view is performing an animation, tracking user selection 5906 * of content, or similar.</p> 5907 * 5908 * @return true if the view has transient state 5909 */ 5910 @ViewDebug.ExportedProperty(category = "layout") 5911 public boolean hasTransientState() { 5912 return (mPrivateFlags2 & PFLAG2_HAS_TRANSIENT_STATE) == PFLAG2_HAS_TRANSIENT_STATE; 5913 } 5914 5915 /** 5916 * Set whether this view is currently tracking transient state that the 5917 * framework should attempt to preserve when possible. This flag is reference counted, 5918 * so every call to setHasTransientState(true) should be paired with a later call 5919 * to setHasTransientState(false). 5920 * 5921 * <p>A view with transient state cannot be trivially rebound from an external 5922 * data source, such as an adapter binding item views in a list. This may be 5923 * because the view is performing an animation, tracking user selection 5924 * of content, or similar.</p> 5925 * 5926 * @param hasTransientState true if this view has transient state 5927 */ 5928 public void setHasTransientState(boolean hasTransientState) { 5929 mTransientStateCount = hasTransientState ? mTransientStateCount + 1 : 5930 mTransientStateCount - 1; 5931 if (mTransientStateCount < 0) { 5932 mTransientStateCount = 0; 5933 Log.e(VIEW_LOG_TAG, "hasTransientState decremented below 0: " + 5934 "unmatched pair of setHasTransientState calls"); 5935 } 5936 if ((hasTransientState && mTransientStateCount == 1) || 5937 (!hasTransientState && mTransientStateCount == 0)) { 5938 // update flag if we've just incremented up from 0 or decremented down to 0 5939 mPrivateFlags2 = (mPrivateFlags2 & ~PFLAG2_HAS_TRANSIENT_STATE) | 5940 (hasTransientState ? PFLAG2_HAS_TRANSIENT_STATE : 0); 5941 if (mParent != null) { 5942 try { 5943 mParent.childHasTransientStateChanged(this, hasTransientState); 5944 } catch (AbstractMethodError e) { 5945 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 5946 " does not fully implement ViewParent", e); 5947 } 5948 } 5949 } 5950 } 5951 5952 /** 5953 * If this view doesn't do any drawing on its own, set this flag to 5954 * allow further optimizations. By default, this flag is not set on 5955 * View, but could be set on some View subclasses such as ViewGroup. 5956 * 5957 * Typically, if you override {@link #onDraw(android.graphics.Canvas)} 5958 * you should clear this flag. 5959 * 5960 * @param willNotDraw whether or not this View draw on its own 5961 */ 5962 public void setWillNotDraw(boolean willNotDraw) { 5963 setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); 5964 } 5965 5966 /** 5967 * Returns whether or not this View draws on its own. 5968 * 5969 * @return true if this view has nothing to draw, false otherwise 5970 */ 5971 @ViewDebug.ExportedProperty(category = "drawing") 5972 public boolean willNotDraw() { 5973 return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; 5974 } 5975 5976 /** 5977 * When a View's drawing cache is enabled, drawing is redirected to an 5978 * offscreen bitmap. Some views, like an ImageView, must be able to 5979 * bypass this mechanism if they already draw a single bitmap, to avoid 5980 * unnecessary usage of the memory. 5981 * 5982 * @param willNotCacheDrawing true if this view does not cache its 5983 * drawing, false otherwise 5984 */ 5985 public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { 5986 setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); 5987 } 5988 5989 /** 5990 * Returns whether or not this View can cache its drawing or not. 5991 * 5992 * @return true if this view does not cache its drawing, false otherwise 5993 */ 5994 @ViewDebug.ExportedProperty(category = "drawing") 5995 public boolean willNotCacheDrawing() { 5996 return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; 5997 } 5998 5999 /** 6000 * Indicates whether this view reacts to click events or not. 6001 * 6002 * @return true if the view is clickable, false otherwise 6003 * 6004 * @see #setClickable(boolean) 6005 * @attr ref android.R.styleable#View_clickable 6006 */ 6007 @ViewDebug.ExportedProperty 6008 public boolean isClickable() { 6009 return (mViewFlags & CLICKABLE) == CLICKABLE; 6010 } 6011 6012 /** 6013 * Enables or disables click events for this view. When a view 6014 * is clickable it will change its state to "pressed" on every click. 6015 * Subclasses should set the view clickable to visually react to 6016 * user's clicks. 6017 * 6018 * @param clickable true to make the view clickable, false otherwise 6019 * 6020 * @see #isClickable() 6021 * @attr ref android.R.styleable#View_clickable 6022 */ 6023 public void setClickable(boolean clickable) { 6024 setFlags(clickable ? CLICKABLE : 0, CLICKABLE); 6025 } 6026 6027 /** 6028 * Indicates whether this view reacts to long click events or not. 6029 * 6030 * @return true if the view is long clickable, false otherwise 6031 * 6032 * @see #setLongClickable(boolean) 6033 * @attr ref android.R.styleable#View_longClickable 6034 */ 6035 public boolean isLongClickable() { 6036 return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 6037 } 6038 6039 /** 6040 * Enables or disables long click events for this view. When a view is long 6041 * clickable it reacts to the user holding down the button for a longer 6042 * duration than a tap. This event can either launch the listener or a 6043 * context menu. 6044 * 6045 * @param longClickable true to make the view long clickable, false otherwise 6046 * @see #isLongClickable() 6047 * @attr ref android.R.styleable#View_longClickable 6048 */ 6049 public void setLongClickable(boolean longClickable) { 6050 setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); 6051 } 6052 6053 /** 6054 * Sets the pressed state for this view. 6055 * 6056 * @see #isClickable() 6057 * @see #setClickable(boolean) 6058 * 6059 * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts 6060 * the View's internal state from a previously set "pressed" state. 6061 */ 6062 public void setPressed(boolean pressed) { 6063 final boolean needsRefresh = pressed != ((mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED); 6064 6065 if (pressed) { 6066 mPrivateFlags |= PFLAG_PRESSED; 6067 } else { 6068 mPrivateFlags &= ~PFLAG_PRESSED; 6069 } 6070 6071 if (needsRefresh) { 6072 refreshDrawableState(); 6073 } 6074 dispatchSetPressed(pressed); 6075 } 6076 6077 /** 6078 * Dispatch setPressed to all of this View's children. 6079 * 6080 * @see #setPressed(boolean) 6081 * 6082 * @param pressed The new pressed state 6083 */ 6084 protected void dispatchSetPressed(boolean pressed) { 6085 } 6086 6087 /** 6088 * Indicates whether the view is currently in pressed state. Unless 6089 * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter 6090 * the pressed state. 6091 * 6092 * @see #setPressed(boolean) 6093 * @see #isClickable() 6094 * @see #setClickable(boolean) 6095 * 6096 * @return true if the view is currently pressed, false otherwise 6097 */ 6098 public boolean isPressed() { 6099 return (mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED; 6100 } 6101 6102 /** 6103 * Indicates whether this view will save its state (that is, 6104 * whether its {@link #onSaveInstanceState} method will be called). 6105 * 6106 * @return Returns true if the view state saving is enabled, else false. 6107 * 6108 * @see #setSaveEnabled(boolean) 6109 * @attr ref android.R.styleable#View_saveEnabled 6110 */ 6111 public boolean isSaveEnabled() { 6112 return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; 6113 } 6114 6115 /** 6116 * Controls whether the saving of this view's state is 6117 * enabled (that is, whether its {@link #onSaveInstanceState} method 6118 * will be called). Note that even if freezing is enabled, the 6119 * view still must have an id assigned to it (via {@link #setId(int)}) 6120 * for its state to be saved. This flag can only disable the 6121 * saving of this view; any child views may still have their state saved. 6122 * 6123 * @param enabled Set to false to <em>disable</em> state saving, or true 6124 * (the default) to allow it. 6125 * 6126 * @see #isSaveEnabled() 6127 * @see #setId(int) 6128 * @see #onSaveInstanceState() 6129 * @attr ref android.R.styleable#View_saveEnabled 6130 */ 6131 public void setSaveEnabled(boolean enabled) { 6132 setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); 6133 } 6134 6135 /** 6136 * Gets whether the framework should discard touches when the view's 6137 * window is obscured by another visible window. 6138 * Refer to the {@link View} security documentation for more details. 6139 * 6140 * @return True if touch filtering is enabled. 6141 * 6142 * @see #setFilterTouchesWhenObscured(boolean) 6143 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 6144 */ 6145 @ViewDebug.ExportedProperty 6146 public boolean getFilterTouchesWhenObscured() { 6147 return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; 6148 } 6149 6150 /** 6151 * Sets whether the framework should discard touches when the view's 6152 * window is obscured by another visible window. 6153 * Refer to the {@link View} security documentation for more details. 6154 * 6155 * @param enabled True if touch filtering should be enabled. 6156 * 6157 * @see #getFilterTouchesWhenObscured 6158 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 6159 */ 6160 public void setFilterTouchesWhenObscured(boolean enabled) { 6161 setFlags(enabled ? 0 : FILTER_TOUCHES_WHEN_OBSCURED, 6162 FILTER_TOUCHES_WHEN_OBSCURED); 6163 } 6164 6165 /** 6166 * Indicates whether the entire hierarchy under this view will save its 6167 * state when a state saving traversal occurs from its parent. The default 6168 * is true; if false, these views will not be saved unless 6169 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 6170 * 6171 * @return Returns true if the view state saving from parent is enabled, else false. 6172 * 6173 * @see #setSaveFromParentEnabled(boolean) 6174 */ 6175 public boolean isSaveFromParentEnabled() { 6176 return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; 6177 } 6178 6179 /** 6180 * Controls whether the entire hierarchy under this view will save its 6181 * state when a state saving traversal occurs from its parent. The default 6182 * is true; if false, these views will not be saved unless 6183 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 6184 * 6185 * @param enabled Set to false to <em>disable</em> state saving, or true 6186 * (the default) to allow it. 6187 * 6188 * @see #isSaveFromParentEnabled() 6189 * @see #setId(int) 6190 * @see #onSaveInstanceState() 6191 */ 6192 public void setSaveFromParentEnabled(boolean enabled) { 6193 setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); 6194 } 6195 6196 6197 /** 6198 * Returns whether this View is able to take focus. 6199 * 6200 * @return True if this view can take focus, or false otherwise. 6201 * @attr ref android.R.styleable#View_focusable 6202 */ 6203 @ViewDebug.ExportedProperty(category = "focus") 6204 public final boolean isFocusable() { 6205 return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); 6206 } 6207 6208 /** 6209 * When a view is focusable, it may not want to take focus when in touch mode. 6210 * For example, a button would like focus when the user is navigating via a D-pad 6211 * so that the user can click on it, but once the user starts touching the screen, 6212 * the button shouldn't take focus 6213 * @return Whether the view is focusable in touch mode. 6214 * @attr ref android.R.styleable#View_focusableInTouchMode 6215 */ 6216 @ViewDebug.ExportedProperty 6217 public final boolean isFocusableInTouchMode() { 6218 return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); 6219 } 6220 6221 /** 6222 * Find the nearest view in the specified direction that can take focus. 6223 * This does not actually give focus to that view. 6224 * 6225 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 6226 * 6227 * @return The nearest focusable in the specified direction, or null if none 6228 * can be found. 6229 */ 6230 public View focusSearch(int direction) { 6231 if (mParent != null) { 6232 return mParent.focusSearch(this, direction); 6233 } else { 6234 return null; 6235 } 6236 } 6237 6238 /** 6239 * This method is the last chance for the focused view and its ancestors to 6240 * respond to an arrow key. This is called when the focused view did not 6241 * consume the key internally, nor could the view system find a new view in 6242 * the requested direction to give focus to. 6243 * 6244 * @param focused The currently focused view. 6245 * @param direction The direction focus wants to move. One of FOCUS_UP, 6246 * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. 6247 * @return True if the this view consumed this unhandled move. 6248 */ 6249 public boolean dispatchUnhandledMove(View focused, int direction) { 6250 return false; 6251 } 6252 6253 /** 6254 * If a user manually specified the next view id for a particular direction, 6255 * use the root to look up the view. 6256 * @param root The root view of the hierarchy containing this view. 6257 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, 6258 * or FOCUS_BACKWARD. 6259 * @return The user specified next view, or null if there is none. 6260 */ 6261 View findUserSetNextFocus(View root, int direction) { 6262 switch (direction) { 6263 case FOCUS_LEFT: 6264 if (mNextFocusLeftId == View.NO_ID) return null; 6265 return findViewInsideOutShouldExist(root, mNextFocusLeftId); 6266 case FOCUS_RIGHT: 6267 if (mNextFocusRightId == View.NO_ID) return null; 6268 return findViewInsideOutShouldExist(root, mNextFocusRightId); 6269 case FOCUS_UP: 6270 if (mNextFocusUpId == View.NO_ID) return null; 6271 return findViewInsideOutShouldExist(root, mNextFocusUpId); 6272 case FOCUS_DOWN: 6273 if (mNextFocusDownId == View.NO_ID) return null; 6274 return findViewInsideOutShouldExist(root, mNextFocusDownId); 6275 case FOCUS_FORWARD: 6276 if (mNextFocusForwardId == View.NO_ID) return null; 6277 return findViewInsideOutShouldExist(root, mNextFocusForwardId); 6278 case FOCUS_BACKWARD: { 6279 if (mID == View.NO_ID) return null; 6280 final int id = mID; 6281 return root.findViewByPredicateInsideOut(this, new Predicate<View>() { 6282 @Override 6283 public boolean apply(View t) { 6284 return t.mNextFocusForwardId == id; 6285 } 6286 }); 6287 } 6288 } 6289 return null; 6290 } 6291 6292 private View findViewInsideOutShouldExist(View root, int id) { 6293 if (mMatchIdPredicate == null) { 6294 mMatchIdPredicate = new MatchIdPredicate(); 6295 } 6296 mMatchIdPredicate.mId = id; 6297 View result = root.findViewByPredicateInsideOut(this, mMatchIdPredicate); 6298 if (result == null) { 6299 Log.w(VIEW_LOG_TAG, "couldn't find view with id " + id); 6300 } 6301 return result; 6302 } 6303 6304 /** 6305 * Find and return all focusable views that are descendants of this view, 6306 * possibly including this view if it is focusable itself. 6307 * 6308 * @param direction The direction of the focus 6309 * @return A list of focusable views 6310 */ 6311 public ArrayList<View> getFocusables(int direction) { 6312 ArrayList<View> result = new ArrayList<View>(24); 6313 addFocusables(result, direction); 6314 return result; 6315 } 6316 6317 /** 6318 * Add any focusable views that are descendants of this view (possibly 6319 * including this view if it is focusable itself) to views. If we are in touch mode, 6320 * only add views that are also focusable in touch mode. 6321 * 6322 * @param views Focusable views found so far 6323 * @param direction The direction of the focus 6324 */ 6325 public void addFocusables(ArrayList<View> views, int direction) { 6326 addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); 6327 } 6328 6329 /** 6330 * Adds any focusable views that are descendants of this view (possibly 6331 * including this view if it is focusable itself) to views. This method 6332 * adds all focusable views regardless if we are in touch mode or 6333 * only views focusable in touch mode if we are in touch mode or 6334 * only views that can take accessibility focus if accessibility is enabeld 6335 * depending on the focusable mode paramater. 6336 * 6337 * @param views Focusable views found so far or null if all we are interested is 6338 * the number of focusables. 6339 * @param direction The direction of the focus. 6340 * @param focusableMode The type of focusables to be added. 6341 * 6342 * @see #FOCUSABLES_ALL 6343 * @see #FOCUSABLES_TOUCH_MODE 6344 */ 6345 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 6346 if (views == null) { 6347 return; 6348 } 6349 if (!isFocusable()) { 6350 return; 6351 } 6352 if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE 6353 && isInTouchMode() && !isFocusableInTouchMode()) { 6354 return; 6355 } 6356 views.add(this); 6357 } 6358 6359 /** 6360 * Finds the Views that contain given text. The containment is case insensitive. 6361 * The search is performed by either the text that the View renders or the content 6362 * description that describes the view for accessibility purposes and the view does 6363 * not render or both. Clients can specify how the search is to be performed via 6364 * passing the {@link #FIND_VIEWS_WITH_TEXT} and 6365 * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. 6366 * 6367 * @param outViews The output list of matching Views. 6368 * @param searched The text to match against. 6369 * 6370 * @see #FIND_VIEWS_WITH_TEXT 6371 * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION 6372 * @see #setContentDescription(CharSequence) 6373 */ 6374 public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) { 6375 if (getAccessibilityNodeProvider() != null) { 6376 if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { 6377 outViews.add(this); 6378 } 6379 } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 6380 && (searched != null && searched.length() > 0) 6381 && (mContentDescription != null && mContentDescription.length() > 0)) { 6382 String searchedLowerCase = searched.toString().toLowerCase(); 6383 String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); 6384 if (contentDescriptionLowerCase.contains(searchedLowerCase)) { 6385 outViews.add(this); 6386 } 6387 } 6388 } 6389 6390 /** 6391 * Find and return all touchable views that are descendants of this view, 6392 * possibly including this view if it is touchable itself. 6393 * 6394 * @return A list of touchable views 6395 */ 6396 public ArrayList<View> getTouchables() { 6397 ArrayList<View> result = new ArrayList<View>(); 6398 addTouchables(result); 6399 return result; 6400 } 6401 6402 /** 6403 * Add any touchable views that are descendants of this view (possibly 6404 * including this view if it is touchable itself) to views. 6405 * 6406 * @param views Touchable views found so far 6407 */ 6408 public void addTouchables(ArrayList<View> views) { 6409 final int viewFlags = mViewFlags; 6410 6411 if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) 6412 && (viewFlags & ENABLED_MASK) == ENABLED) { 6413 views.add(this); 6414 } 6415 } 6416 6417 /** 6418 * Returns whether this View is accessibility focused. 6419 * 6420 * @return True if this View is accessibility focused. 6421 */ 6422 boolean isAccessibilityFocused() { 6423 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0; 6424 } 6425 6426 /** 6427 * Call this to try to give accessibility focus to this view. 6428 * 6429 * A view will not actually take focus if {@link AccessibilityManager#isEnabled()} 6430 * returns false or the view is no visible or the view already has accessibility 6431 * focus. 6432 * 6433 * See also {@link #focusSearch(int)}, which is what you call to say that you 6434 * have focus, and you want your parent to look for the next one. 6435 * 6436 * @return Whether this view actually took accessibility focus. 6437 * 6438 * @hide 6439 */ 6440 public boolean requestAccessibilityFocus() { 6441 AccessibilityManager manager = AccessibilityManager.getInstance(mContext); 6442 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 6443 return false; 6444 } 6445 if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { 6446 return false; 6447 } 6448 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) == 0) { 6449 mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_FOCUSED; 6450 ViewRootImpl viewRootImpl = getViewRootImpl(); 6451 if (viewRootImpl != null) { 6452 viewRootImpl.setAccessibilityFocus(this, null); 6453 } 6454 if (mAttachInfo != null) { 6455 Rect rectangle = mAttachInfo.mTmpInvalRect; 6456 getDrawingRect(rectangle); 6457 requestRectangleOnScreen(rectangle); 6458 } 6459 invalidate(); 6460 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 6461 notifyAccessibilityStateChanged(); 6462 return true; 6463 } 6464 return false; 6465 } 6466 6467 /** 6468 * Call this to try to clear accessibility focus of this view. 6469 * 6470 * See also {@link #focusSearch(int)}, which is what you call to say that you 6471 * have focus, and you want your parent to look for the next one. 6472 * 6473 * @hide 6474 */ 6475 public void clearAccessibilityFocus() { 6476 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { 6477 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; 6478 invalidate(); 6479 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 6480 notifyAccessibilityStateChanged(); 6481 } 6482 // Clear the global reference of accessibility focus if this 6483 // view or any of its descendants had accessibility focus. 6484 ViewRootImpl viewRootImpl = getViewRootImpl(); 6485 if (viewRootImpl != null) { 6486 View focusHost = viewRootImpl.getAccessibilityFocusedHost(); 6487 if (focusHost != null && ViewRootImpl.isViewDescendantOf(focusHost, this)) { 6488 viewRootImpl.setAccessibilityFocus(null, null); 6489 } 6490 } 6491 } 6492 6493 private void sendAccessibilityHoverEvent(int eventType) { 6494 // Since we are not delivering to a client accessibility events from not 6495 // important views (unless the clinet request that) we need to fire the 6496 // event from the deepest view exposed to the client. As a consequence if 6497 // the user crosses a not exposed view the client will see enter and exit 6498 // of the exposed predecessor followed by and enter and exit of that same 6499 // predecessor when entering and exiting the not exposed descendant. This 6500 // is fine since the client has a clear idea which view is hovered at the 6501 // price of a couple more events being sent. This is a simple and 6502 // working solution. 6503 View source = this; 6504 while (true) { 6505 if (source.includeForAccessibility()) { 6506 source.sendAccessibilityEvent(eventType); 6507 return; 6508 } 6509 ViewParent parent = source.getParent(); 6510 if (parent instanceof View) { 6511 source = (View) parent; 6512 } else { 6513 return; 6514 } 6515 } 6516 } 6517 6518 /** 6519 * Clears accessibility focus without calling any callback methods 6520 * normally invoked in {@link #clearAccessibilityFocus()}. This method 6521 * is used for clearing accessibility focus when giving this focus to 6522 * another view. 6523 */ 6524 void clearAccessibilityFocusNoCallbacks() { 6525 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { 6526 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; 6527 invalidate(); 6528 } 6529 } 6530 6531 /** 6532 * Call this to try to give focus to a specific view or to one of its 6533 * descendants. 6534 * 6535 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 6536 * false), or if it is focusable and it is not focusable in touch mode 6537 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 6538 * 6539 * See also {@link #focusSearch(int)}, which is what you call to say that you 6540 * have focus, and you want your parent to look for the next one. 6541 * 6542 * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments 6543 * {@link #FOCUS_DOWN} and <code>null</code>. 6544 * 6545 * @return Whether this view or one of its descendants actually took focus. 6546 */ 6547 public final boolean requestFocus() { 6548 return requestFocus(View.FOCUS_DOWN); 6549 } 6550 6551 /** 6552 * Call this to try to give focus to a specific view or to one of its 6553 * descendants and give it a hint about what direction focus is heading. 6554 * 6555 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 6556 * false), or if it is focusable and it is not focusable in touch mode 6557 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 6558 * 6559 * See also {@link #focusSearch(int)}, which is what you call to say that you 6560 * have focus, and you want your parent to look for the next one. 6561 * 6562 * This is equivalent to calling {@link #requestFocus(int, Rect)} with 6563 * <code>null</code> set for the previously focused rectangle. 6564 * 6565 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 6566 * @return Whether this view or one of its descendants actually took focus. 6567 */ 6568 public final boolean requestFocus(int direction) { 6569 return requestFocus(direction, null); 6570 } 6571 6572 /** 6573 * Call this to try to give focus to a specific view or to one of its descendants 6574 * and give it hints about the direction and a specific rectangle that the focus 6575 * is coming from. The rectangle can help give larger views a finer grained hint 6576 * about where focus is coming from, and therefore, where to show selection, or 6577 * forward focus change internally. 6578 * 6579 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 6580 * false), or if it is focusable and it is not focusable in touch mode 6581 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 6582 * 6583 * A View will not take focus if it is not visible. 6584 * 6585 * A View will not take focus if one of its parents has 6586 * {@link android.view.ViewGroup#getDescendantFocusability()} equal to 6587 * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. 6588 * 6589 * See also {@link #focusSearch(int)}, which is what you call to say that you 6590 * have focus, and you want your parent to look for the next one. 6591 * 6592 * You may wish to override this method if your custom {@link View} has an internal 6593 * {@link View} that it wishes to forward the request to. 6594 * 6595 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 6596 * @param previouslyFocusedRect The rectangle (in this View's coordinate system) 6597 * to give a finer grained hint about where focus is coming from. May be null 6598 * if there is no hint. 6599 * @return Whether this view or one of its descendants actually took focus. 6600 */ 6601 public boolean requestFocus(int direction, Rect previouslyFocusedRect) { 6602 return requestFocusNoSearch(direction, previouslyFocusedRect); 6603 } 6604 6605 private boolean requestFocusNoSearch(int direction, Rect previouslyFocusedRect) { 6606 // need to be focusable 6607 if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || 6608 (mViewFlags & VISIBILITY_MASK) != VISIBLE) { 6609 return false; 6610 } 6611 6612 // need to be focusable in touch mode if in touch mode 6613 if (isInTouchMode() && 6614 (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { 6615 return false; 6616 } 6617 6618 // need to not have any parents blocking us 6619 if (hasAncestorThatBlocksDescendantFocus()) { 6620 return false; 6621 } 6622 6623 handleFocusGainInternal(direction, previouslyFocusedRect); 6624 return true; 6625 } 6626 6627 /** 6628 * Call this to try to give focus to a specific view or to one of its descendants. This is a 6629 * special variant of {@link #requestFocus() } that will allow views that are not focuable in 6630 * touch mode to request focus when they are touched. 6631 * 6632 * @return Whether this view or one of its descendants actually took focus. 6633 * 6634 * @see #isInTouchMode() 6635 * 6636 */ 6637 public final boolean requestFocusFromTouch() { 6638 // Leave touch mode if we need to 6639 if (isInTouchMode()) { 6640 ViewRootImpl viewRoot = getViewRootImpl(); 6641 if (viewRoot != null) { 6642 viewRoot.ensureTouchMode(false); 6643 } 6644 } 6645 return requestFocus(View.FOCUS_DOWN); 6646 } 6647 6648 /** 6649 * @return Whether any ancestor of this view blocks descendant focus. 6650 */ 6651 private boolean hasAncestorThatBlocksDescendantFocus() { 6652 ViewParent ancestor = mParent; 6653 while (ancestor instanceof ViewGroup) { 6654 final ViewGroup vgAncestor = (ViewGroup) ancestor; 6655 if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS) { 6656 return true; 6657 } else { 6658 ancestor = vgAncestor.getParent(); 6659 } 6660 } 6661 return false; 6662 } 6663 6664 /** 6665 * Gets the mode for determining whether this View is important for accessibility 6666 * which is if it fires accessibility events and if it is reported to 6667 * accessibility services that query the screen. 6668 * 6669 * @return The mode for determining whether a View is important for accessibility. 6670 * 6671 * @attr ref android.R.styleable#View_importantForAccessibility 6672 * 6673 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 6674 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 6675 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 6676 */ 6677 @ViewDebug.ExportedProperty(category = "accessibility", mapping = { 6678 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"), 6679 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"), 6680 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no") 6681 }) 6682 public int getImportantForAccessibility() { 6683 return (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 6684 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 6685 } 6686 6687 /** 6688 * Sets how to determine whether this view is important for accessibility 6689 * which is if it fires accessibility events and if it is reported to 6690 * accessibility services that query the screen. 6691 * 6692 * @param mode How to determine whether this view is important for accessibility. 6693 * 6694 * @attr ref android.R.styleable#View_importantForAccessibility 6695 * 6696 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 6697 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 6698 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 6699 */ 6700 public void setImportantForAccessibility(int mode) { 6701 if (mode != getImportantForAccessibility()) { 6702 mPrivateFlags2 &= ~PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 6703 mPrivateFlags2 |= (mode << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT) 6704 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 6705 notifyAccessibilityStateChanged(); 6706 } 6707 } 6708 6709 /** 6710 * Gets whether this view should be exposed for accessibility. 6711 * 6712 * @return Whether the view is exposed for accessibility. 6713 * 6714 * @hide 6715 */ 6716 public boolean isImportantForAccessibility() { 6717 final int mode = (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 6718 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 6719 switch (mode) { 6720 case IMPORTANT_FOR_ACCESSIBILITY_YES: 6721 return true; 6722 case IMPORTANT_FOR_ACCESSIBILITY_NO: 6723 return false; 6724 case IMPORTANT_FOR_ACCESSIBILITY_AUTO: 6725 return isActionableForAccessibility() || hasListenersForAccessibility() 6726 || getAccessibilityNodeProvider() != null; 6727 default: 6728 throw new IllegalArgumentException("Unknow important for accessibility mode: " 6729 + mode); 6730 } 6731 } 6732 6733 /** 6734 * Gets the parent for accessibility purposes. Note that the parent for 6735 * accessibility is not necessary the immediate parent. It is the first 6736 * predecessor that is important for accessibility. 6737 * 6738 * @return The parent for accessibility purposes. 6739 */ 6740 public ViewParent getParentForAccessibility() { 6741 if (mParent instanceof View) { 6742 View parentView = (View) mParent; 6743 if (parentView.includeForAccessibility()) { 6744 return mParent; 6745 } else { 6746 return mParent.getParentForAccessibility(); 6747 } 6748 } 6749 return null; 6750 } 6751 6752 /** 6753 * Adds the children of a given View for accessibility. Since some Views are 6754 * not important for accessibility the children for accessibility are not 6755 * necessarily direct children of the riew, rather they are the first level of 6756 * descendants important for accessibility. 6757 * 6758 * @param children The list of children for accessibility. 6759 */ 6760 public void addChildrenForAccessibility(ArrayList<View> children) { 6761 if (includeForAccessibility()) { 6762 children.add(this); 6763 } 6764 } 6765 6766 /** 6767 * Whether to regard this view for accessibility. A view is regarded for 6768 * accessibility if it is important for accessibility or the querying 6769 * accessibility service has explicitly requested that view not 6770 * important for accessibility are regarded. 6771 * 6772 * @return Whether to regard the view for accessibility. 6773 * 6774 * @hide 6775 */ 6776 public boolean includeForAccessibility() { 6777 if (mAttachInfo != null) { 6778 return mAttachInfo.mIncludeNotImportantViews || isImportantForAccessibility(); 6779 } 6780 return false; 6781 } 6782 6783 /** 6784 * Returns whether the View is considered actionable from 6785 * accessibility perspective. Such view are important for 6786 * accessibility. 6787 * 6788 * @return True if the view is actionable for accessibility. 6789 * 6790 * @hide 6791 */ 6792 public boolean isActionableForAccessibility() { 6793 return (isClickable() || isLongClickable() || isFocusable()); 6794 } 6795 6796 /** 6797 * Returns whether the View has registered callbacks wich makes it 6798 * important for accessibility. 6799 * 6800 * @return True if the view is actionable for accessibility. 6801 */ 6802 private boolean hasListenersForAccessibility() { 6803 ListenerInfo info = getListenerInfo(); 6804 return mTouchDelegate != null || info.mOnKeyListener != null 6805 || info.mOnTouchListener != null || info.mOnGenericMotionListener != null 6806 || info.mOnHoverListener != null || info.mOnDragListener != null; 6807 } 6808 6809 /** 6810 * Notifies accessibility services that some view's important for 6811 * accessibility state has changed. Note that such notifications 6812 * are made at most once every 6813 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 6814 * to avoid unnecessary load to the system. Also once a view has 6815 * made a notifucation this method is a NOP until the notification has 6816 * been sent to clients. 6817 * 6818 * @hide 6819 * 6820 * TODO: Makse sure this method is called for any view state change 6821 * that is interesting for accessilility purposes. 6822 */ 6823 public void notifyAccessibilityStateChanged() { 6824 if (!AccessibilityManager.getInstance(mContext).isEnabled()) { 6825 return; 6826 } 6827 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_STATE_CHANGED) == 0) { 6828 mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_STATE_CHANGED; 6829 if (mParent != null) { 6830 mParent.childAccessibilityStateChanged(this); 6831 } 6832 } 6833 } 6834 6835 /** 6836 * Reset the state indicating the this view has requested clients 6837 * interested in its accessibility state to be notified. 6838 * 6839 * @hide 6840 */ 6841 public void resetAccessibilityStateChanged() { 6842 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_STATE_CHANGED; 6843 } 6844 6845 /** 6846 * Performs the specified accessibility action on the view. For 6847 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 6848 * <p> 6849 * If an {@link AccessibilityDelegate} has been specified via calling 6850 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6851 * {@link AccessibilityDelegate#performAccessibilityAction(View, int, Bundle)} 6852 * is responsible for handling this call. 6853 * </p> 6854 * 6855 * @param action The action to perform. 6856 * @param arguments Optional action arguments. 6857 * @return Whether the action was performed. 6858 */ 6859 public boolean performAccessibilityAction(int action, Bundle arguments) { 6860 if (mAccessibilityDelegate != null) { 6861 return mAccessibilityDelegate.performAccessibilityAction(this, action, arguments); 6862 } else { 6863 return performAccessibilityActionInternal(action, arguments); 6864 } 6865 } 6866 6867 /** 6868 * @see #performAccessibilityAction(int, Bundle) 6869 * 6870 * Note: Called from the default {@link AccessibilityDelegate}. 6871 */ 6872 boolean performAccessibilityActionInternal(int action, Bundle arguments) { 6873 switch (action) { 6874 case AccessibilityNodeInfo.ACTION_CLICK: { 6875 if (isClickable()) { 6876 return performClick(); 6877 } 6878 } break; 6879 case AccessibilityNodeInfo.ACTION_LONG_CLICK: { 6880 if (isLongClickable()) { 6881 return performLongClick(); 6882 } 6883 } break; 6884 case AccessibilityNodeInfo.ACTION_FOCUS: { 6885 if (!hasFocus()) { 6886 // Get out of touch mode since accessibility 6887 // wants to move focus around. 6888 getViewRootImpl().ensureTouchMode(false); 6889 return requestFocus(); 6890 } 6891 } break; 6892 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 6893 if (hasFocus()) { 6894 clearFocus(); 6895 return !isFocused(); 6896 } 6897 } break; 6898 case AccessibilityNodeInfo.ACTION_SELECT: { 6899 if (!isSelected()) { 6900 setSelected(true); 6901 return isSelected(); 6902 } 6903 } break; 6904 case AccessibilityNodeInfo.ACTION_CLEAR_SELECTION: { 6905 if (isSelected()) { 6906 setSelected(false); 6907 return !isSelected(); 6908 } 6909 } break; 6910 case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: { 6911 if (!isAccessibilityFocused()) { 6912 return requestAccessibilityFocus(); 6913 } 6914 } break; 6915 case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: { 6916 if (isAccessibilityFocused()) { 6917 clearAccessibilityFocus(); 6918 return true; 6919 } 6920 } break; 6921 case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY: { 6922 if (arguments != null) { 6923 final int granularity = arguments.getInt( 6924 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 6925 return nextAtGranularity(granularity); 6926 } 6927 } break; 6928 case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: { 6929 if (arguments != null) { 6930 final int granularity = arguments.getInt( 6931 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 6932 return previousAtGranularity(granularity); 6933 } 6934 } break; 6935 } 6936 return false; 6937 } 6938 6939 private boolean nextAtGranularity(int granularity) { 6940 CharSequence text = getIterableTextForAccessibility(); 6941 if (text == null || text.length() == 0) { 6942 return false; 6943 } 6944 TextSegmentIterator iterator = getIteratorForGranularity(granularity); 6945 if (iterator == null) { 6946 return false; 6947 } 6948 final int current = getAccessibilityCursorPosition(); 6949 final int[] range = iterator.following(current); 6950 if (range == null) { 6951 return false; 6952 } 6953 final int start = range[0]; 6954 final int end = range[1]; 6955 setAccessibilityCursorPosition(end); 6956 sendViewTextTraversedAtGranularityEvent( 6957 AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY, 6958 granularity, start, end); 6959 return true; 6960 } 6961 6962 private boolean previousAtGranularity(int granularity) { 6963 CharSequence text = getIterableTextForAccessibility(); 6964 if (text == null || text.length() == 0) { 6965 return false; 6966 } 6967 TextSegmentIterator iterator = getIteratorForGranularity(granularity); 6968 if (iterator == null) { 6969 return false; 6970 } 6971 int current = getAccessibilityCursorPosition(); 6972 if (current == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 6973 current = text.length(); 6974 } else if (granularity == AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER) { 6975 // When traversing by character we always put the cursor after the character 6976 // to ease edit and have to compensate before asking the for previous segment. 6977 current--; 6978 } 6979 final int[] range = iterator.preceding(current); 6980 if (range == null) { 6981 return false; 6982 } 6983 final int start = range[0]; 6984 final int end = range[1]; 6985 // Always put the cursor after the character to ease edit. 6986 if (granularity == AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER) { 6987 setAccessibilityCursorPosition(end); 6988 } else { 6989 setAccessibilityCursorPosition(start); 6990 } 6991 sendViewTextTraversedAtGranularityEvent( 6992 AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY, 6993 granularity, start, end); 6994 return true; 6995 } 6996 6997 /** 6998 * Gets the text reported for accessibility purposes. 6999 * 7000 * @return The accessibility text. 7001 * 7002 * @hide 7003 */ 7004 public CharSequence getIterableTextForAccessibility() { 7005 return getContentDescription(); 7006 } 7007 7008 /** 7009 * @hide 7010 */ 7011 public int getAccessibilityCursorPosition() { 7012 return mAccessibilityCursorPosition; 7013 } 7014 7015 /** 7016 * @hide 7017 */ 7018 public void setAccessibilityCursorPosition(int position) { 7019 mAccessibilityCursorPosition = position; 7020 } 7021 7022 private void sendViewTextTraversedAtGranularityEvent(int action, int granularity, 7023 int fromIndex, int toIndex) { 7024 if (mParent == null) { 7025 return; 7026 } 7027 AccessibilityEvent event = AccessibilityEvent.obtain( 7028 AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY); 7029 onInitializeAccessibilityEvent(event); 7030 onPopulateAccessibilityEvent(event); 7031 event.setFromIndex(fromIndex); 7032 event.setToIndex(toIndex); 7033 event.setAction(action); 7034 event.setMovementGranularity(granularity); 7035 mParent.requestSendAccessibilityEvent(this, event); 7036 } 7037 7038 /** 7039 * @hide 7040 */ 7041 public TextSegmentIterator getIteratorForGranularity(int granularity) { 7042 switch (granularity) { 7043 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER: { 7044 CharSequence text = getIterableTextForAccessibility(); 7045 if (text != null && text.length() > 0) { 7046 CharacterTextSegmentIterator iterator = 7047 CharacterTextSegmentIterator.getInstance( 7048 mContext.getResources().getConfiguration().locale); 7049 iterator.initialize(text.toString()); 7050 return iterator; 7051 } 7052 } break; 7053 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD: { 7054 CharSequence text = getIterableTextForAccessibility(); 7055 if (text != null && text.length() > 0) { 7056 WordTextSegmentIterator iterator = 7057 WordTextSegmentIterator.getInstance( 7058 mContext.getResources().getConfiguration().locale); 7059 iterator.initialize(text.toString()); 7060 return iterator; 7061 } 7062 } break; 7063 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH: { 7064 CharSequence text = getIterableTextForAccessibility(); 7065 if (text != null && text.length() > 0) { 7066 ParagraphTextSegmentIterator iterator = 7067 ParagraphTextSegmentIterator.getInstance(); 7068 iterator.initialize(text.toString()); 7069 return iterator; 7070 } 7071 } break; 7072 } 7073 return null; 7074 } 7075 7076 /** 7077 * @hide 7078 */ 7079 public void dispatchStartTemporaryDetach() { 7080 clearAccessibilityFocus(); 7081 clearDisplayList(); 7082 7083 onStartTemporaryDetach(); 7084 } 7085 7086 /** 7087 * This is called when a container is going to temporarily detach a child, with 7088 * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. 7089 * It will either be followed by {@link #onFinishTemporaryDetach()} or 7090 * {@link #onDetachedFromWindow()} when the container is done. 7091 */ 7092 public void onStartTemporaryDetach() { 7093 removeUnsetPressCallback(); 7094 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 7095 } 7096 7097 /** 7098 * @hide 7099 */ 7100 public void dispatchFinishTemporaryDetach() { 7101 onFinishTemporaryDetach(); 7102 } 7103 7104 /** 7105 * Called after {@link #onStartTemporaryDetach} when the container is done 7106 * changing the view. 7107 */ 7108 public void onFinishTemporaryDetach() { 7109 } 7110 7111 /** 7112 * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} 7113 * for this view's window. Returns null if the view is not currently attached 7114 * to the window. Normally you will not need to use this directly, but 7115 * just use the standard high-level event callbacks like 7116 * {@link #onKeyDown(int, KeyEvent)}. 7117 */ 7118 public KeyEvent.DispatcherState getKeyDispatcherState() { 7119 return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; 7120 } 7121 7122 /** 7123 * Dispatch a key event before it is processed by any input method 7124 * associated with the view hierarchy. This can be used to intercept 7125 * key events in special situations before the IME consumes them; a 7126 * typical example would be handling the BACK key to update the application's 7127 * UI instead of allowing the IME to see it and close itself. 7128 * 7129 * @param event The key event to be dispatched. 7130 * @return True if the event was handled, false otherwise. 7131 */ 7132 public boolean dispatchKeyEventPreIme(KeyEvent event) { 7133 return onKeyPreIme(event.getKeyCode(), event); 7134 } 7135 7136 /** 7137 * Dispatch a key event to the next view on the focus path. This path runs 7138 * from the top of the view tree down to the currently focused view. If this 7139 * view has focus, it will dispatch to itself. Otherwise it will dispatch 7140 * the next node down the focus path. This method also fires any key 7141 * listeners. 7142 * 7143 * @param event The key event to be dispatched. 7144 * @return True if the event was handled, false otherwise. 7145 */ 7146 public boolean dispatchKeyEvent(KeyEvent event) { 7147 if (mInputEventConsistencyVerifier != null) { 7148 mInputEventConsistencyVerifier.onKeyEvent(event, 0); 7149 } 7150 7151 // Give any attached key listener a first crack at the event. 7152 //noinspection SimplifiableIfStatement 7153 ListenerInfo li = mListenerInfo; 7154 if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 7155 && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { 7156 return true; 7157 } 7158 7159 if (event.dispatch(this, mAttachInfo != null 7160 ? mAttachInfo.mKeyDispatchState : null, this)) { 7161 return true; 7162 } 7163 7164 if (mInputEventConsistencyVerifier != null) { 7165 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7166 } 7167 return false; 7168 } 7169 7170 /** 7171 * Dispatches a key shortcut event. 7172 * 7173 * @param event The key event to be dispatched. 7174 * @return True if the event was handled by the view, false otherwise. 7175 */ 7176 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 7177 return onKeyShortcut(event.getKeyCode(), event); 7178 } 7179 7180 /** 7181 * Pass the touch screen motion event down to the target view, or this 7182 * view if it is the target. 7183 * 7184 * @param event The motion event to be dispatched. 7185 * @return True if the event was handled by the view, false otherwise. 7186 */ 7187 public boolean dispatchTouchEvent(MotionEvent event) { 7188 if (mInputEventConsistencyVerifier != null) { 7189 mInputEventConsistencyVerifier.onTouchEvent(event, 0); 7190 } 7191 7192 if (onFilterTouchEventForSecurity(event)) { 7193 //noinspection SimplifiableIfStatement 7194 ListenerInfo li = mListenerInfo; 7195 if (li != null && li.mOnTouchListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 7196 && li.mOnTouchListener.onTouch(this, event)) { 7197 return true; 7198 } 7199 7200 if (onTouchEvent(event)) { 7201 return true; 7202 } 7203 } 7204 7205 if (mInputEventConsistencyVerifier != null) { 7206 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7207 } 7208 return false; 7209 } 7210 7211 /** 7212 * Filter the touch event to apply security policies. 7213 * 7214 * @param event The motion event to be filtered. 7215 * @return True if the event should be dispatched, false if the event should be dropped. 7216 * 7217 * @see #getFilterTouchesWhenObscured 7218 */ 7219 public boolean onFilterTouchEventForSecurity(MotionEvent event) { 7220 //noinspection RedundantIfStatement 7221 if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 7222 && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { 7223 // Window is obscured, drop this touch. 7224 return false; 7225 } 7226 return true; 7227 } 7228 7229 /** 7230 * Pass a trackball motion event down to the focused view. 7231 * 7232 * @param event The motion event to be dispatched. 7233 * @return True if the event was handled by the view, false otherwise. 7234 */ 7235 public boolean dispatchTrackballEvent(MotionEvent event) { 7236 if (mInputEventConsistencyVerifier != null) { 7237 mInputEventConsistencyVerifier.onTrackballEvent(event, 0); 7238 } 7239 7240 return onTrackballEvent(event); 7241 } 7242 7243 /** 7244 * Dispatch a generic motion event. 7245 * <p> 7246 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 7247 * are delivered to the view under the pointer. All other generic motion events are 7248 * delivered to the focused view. Hover events are handled specially and are delivered 7249 * to {@link #onHoverEvent(MotionEvent)}. 7250 * </p> 7251 * 7252 * @param event The motion event to be dispatched. 7253 * @return True if the event was handled by the view, false otherwise. 7254 */ 7255 public boolean dispatchGenericMotionEvent(MotionEvent event) { 7256 if (mInputEventConsistencyVerifier != null) { 7257 mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); 7258 } 7259 7260 final int source = event.getSource(); 7261 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 7262 final int action = event.getAction(); 7263 if (action == MotionEvent.ACTION_HOVER_ENTER 7264 || action == MotionEvent.ACTION_HOVER_MOVE 7265 || action == MotionEvent.ACTION_HOVER_EXIT) { 7266 if (dispatchHoverEvent(event)) { 7267 return true; 7268 } 7269 } else if (dispatchGenericPointerEvent(event)) { 7270 return true; 7271 } 7272 } else if (dispatchGenericFocusedEvent(event)) { 7273 return true; 7274 } 7275 7276 if (dispatchGenericMotionEventInternal(event)) { 7277 return true; 7278 } 7279 7280 if (mInputEventConsistencyVerifier != null) { 7281 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7282 } 7283 return false; 7284 } 7285 7286 private boolean dispatchGenericMotionEventInternal(MotionEvent event) { 7287 //noinspection SimplifiableIfStatement 7288 ListenerInfo li = mListenerInfo; 7289 if (li != null && li.mOnGenericMotionListener != null 7290 && (mViewFlags & ENABLED_MASK) == ENABLED 7291 && li.mOnGenericMotionListener.onGenericMotion(this, event)) { 7292 return true; 7293 } 7294 7295 if (onGenericMotionEvent(event)) { 7296 return true; 7297 } 7298 7299 if (mInputEventConsistencyVerifier != null) { 7300 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 7301 } 7302 return false; 7303 } 7304 7305 /** 7306 * Dispatch a hover event. 7307 * <p> 7308 * Do not call this method directly. 7309 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 7310 * </p> 7311 * 7312 * @param event The motion event to be dispatched. 7313 * @return True if the event was handled by the view, false otherwise. 7314 */ 7315 protected boolean dispatchHoverEvent(MotionEvent event) { 7316 //noinspection SimplifiableIfStatement 7317 ListenerInfo li = mListenerInfo; 7318 if (li != null && li.mOnHoverListener != null 7319 && (mViewFlags & ENABLED_MASK) == ENABLED 7320 && li.mOnHoverListener.onHover(this, event)) { 7321 return true; 7322 } 7323 7324 return onHoverEvent(event); 7325 } 7326 7327 /** 7328 * Returns true if the view has a child to which it has recently sent 7329 * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and 7330 * it does not have a hovered child, then it must be the innermost hovered view. 7331 * @hide 7332 */ 7333 protected boolean hasHoveredChild() { 7334 return false; 7335 } 7336 7337 /** 7338 * Dispatch a generic motion event to the view under the first pointer. 7339 * <p> 7340 * Do not call this method directly. 7341 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 7342 * </p> 7343 * 7344 * @param event The motion event to be dispatched. 7345 * @return True if the event was handled by the view, false otherwise. 7346 */ 7347 protected boolean dispatchGenericPointerEvent(MotionEvent event) { 7348 return false; 7349 } 7350 7351 /** 7352 * Dispatch a generic motion event to the currently focused view. 7353 * <p> 7354 * Do not call this method directly. 7355 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 7356 * </p> 7357 * 7358 * @param event The motion event to be dispatched. 7359 * @return True if the event was handled by the view, false otherwise. 7360 */ 7361 protected boolean dispatchGenericFocusedEvent(MotionEvent event) { 7362 return false; 7363 } 7364 7365 /** 7366 * Dispatch a pointer event. 7367 * <p> 7368 * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all 7369 * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns 7370 * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches 7371 * and should not be expected to handle other pointing device features. 7372 * </p> 7373 * 7374 * @param event The motion event to be dispatched. 7375 * @return True if the event was handled by the view, false otherwise. 7376 * @hide 7377 */ 7378 public final boolean dispatchPointerEvent(MotionEvent event) { 7379 if (event.isTouchEvent()) { 7380 return dispatchTouchEvent(event); 7381 } else { 7382 return dispatchGenericMotionEvent(event); 7383 } 7384 } 7385 7386 /** 7387 * Called when the window containing this view gains or loses window focus. 7388 * ViewGroups should override to route to their children. 7389 * 7390 * @param hasFocus True if the window containing this view now has focus, 7391 * false otherwise. 7392 */ 7393 public void dispatchWindowFocusChanged(boolean hasFocus) { 7394 onWindowFocusChanged(hasFocus); 7395 } 7396 7397 /** 7398 * Called when the window containing this view gains or loses focus. Note 7399 * that this is separate from view focus: to receive key events, both 7400 * your view and its window must have focus. If a window is displayed 7401 * on top of yours that takes input focus, then your own window will lose 7402 * focus but the view focus will remain unchanged. 7403 * 7404 * @param hasWindowFocus True if the window containing this view now has 7405 * focus, false otherwise. 7406 */ 7407 public void onWindowFocusChanged(boolean hasWindowFocus) { 7408 InputMethodManager imm = InputMethodManager.peekInstance(); 7409 if (!hasWindowFocus) { 7410 if (isPressed()) { 7411 setPressed(false); 7412 } 7413 if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 7414 imm.focusOut(this); 7415 } 7416 removeLongPressCallback(); 7417 removeTapCallback(); 7418 onFocusLost(); 7419 } else if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 7420 imm.focusIn(this); 7421 } 7422 refreshDrawableState(); 7423 } 7424 7425 /** 7426 * Returns true if this view is in a window that currently has window focus. 7427 * Note that this is not the same as the view itself having focus. 7428 * 7429 * @return True if this view is in a window that currently has window focus. 7430 */ 7431 public boolean hasWindowFocus() { 7432 return mAttachInfo != null && mAttachInfo.mHasWindowFocus; 7433 } 7434 7435 /** 7436 * Dispatch a view visibility change down the view hierarchy. 7437 * ViewGroups should override to route to their children. 7438 * @param changedView The view whose visibility changed. Could be 'this' or 7439 * an ancestor view. 7440 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 7441 * {@link #INVISIBLE} or {@link #GONE}. 7442 */ 7443 protected void dispatchVisibilityChanged(View changedView, int visibility) { 7444 onVisibilityChanged(changedView, visibility); 7445 } 7446 7447 /** 7448 * Called when the visibility of the view or an ancestor of the view is changed. 7449 * @param changedView The view whose visibility changed. Could be 'this' or 7450 * an ancestor view. 7451 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 7452 * {@link #INVISIBLE} or {@link #GONE}. 7453 */ 7454 protected void onVisibilityChanged(View changedView, int visibility) { 7455 if (visibility == VISIBLE) { 7456 if (mAttachInfo != null) { 7457 initialAwakenScrollBars(); 7458 } else { 7459 mPrivateFlags |= PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH; 7460 } 7461 } 7462 } 7463 7464 /** 7465 * Dispatch a hint about whether this view is displayed. For instance, when 7466 * a View moves out of the screen, it might receives a display hint indicating 7467 * the view is not displayed. Applications should not <em>rely</em> on this hint 7468 * as there is no guarantee that they will receive one. 7469 * 7470 * @param hint A hint about whether or not this view is displayed: 7471 * {@link #VISIBLE} or {@link #INVISIBLE}. 7472 */ 7473 public void dispatchDisplayHint(int hint) { 7474 onDisplayHint(hint); 7475 } 7476 7477 /** 7478 * Gives this view a hint about whether is displayed or not. For instance, when 7479 * a View moves out of the screen, it might receives a display hint indicating 7480 * the view is not displayed. Applications should not <em>rely</em> on this hint 7481 * as there is no guarantee that they will receive one. 7482 * 7483 * @param hint A hint about whether or not this view is displayed: 7484 * {@link #VISIBLE} or {@link #INVISIBLE}. 7485 */ 7486 protected void onDisplayHint(int hint) { 7487 } 7488 7489 /** 7490 * Dispatch a window visibility change down the view hierarchy. 7491 * ViewGroups should override to route to their children. 7492 * 7493 * @param visibility The new visibility of the window. 7494 * 7495 * @see #onWindowVisibilityChanged(int) 7496 */ 7497 public void dispatchWindowVisibilityChanged(int visibility) { 7498 onWindowVisibilityChanged(visibility); 7499 } 7500 7501 /** 7502 * Called when the window containing has change its visibility 7503 * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note 7504 * that this tells you whether or not your window is being made visible 7505 * to the window manager; this does <em>not</em> tell you whether or not 7506 * your window is obscured by other windows on the screen, even if it 7507 * is itself visible. 7508 * 7509 * @param visibility The new visibility of the window. 7510 */ 7511 protected void onWindowVisibilityChanged(int visibility) { 7512 if (visibility == VISIBLE) { 7513 initialAwakenScrollBars(); 7514 } 7515 } 7516 7517 /** 7518 * Returns the current visibility of the window this view is attached to 7519 * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). 7520 * 7521 * @return Returns the current visibility of the view's window. 7522 */ 7523 public int getWindowVisibility() { 7524 return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; 7525 } 7526 7527 /** 7528 * Retrieve the overall visible display size in which the window this view is 7529 * attached to has been positioned in. This takes into account screen 7530 * decorations above the window, for both cases where the window itself 7531 * is being position inside of them or the window is being placed under 7532 * then and covered insets are used for the window to position its content 7533 * inside. In effect, this tells you the available area where content can 7534 * be placed and remain visible to users. 7535 * 7536 * <p>This function requires an IPC back to the window manager to retrieve 7537 * the requested information, so should not be used in performance critical 7538 * code like drawing. 7539 * 7540 * @param outRect Filled in with the visible display frame. If the view 7541 * is not attached to a window, this is simply the raw display size. 7542 */ 7543 public void getWindowVisibleDisplayFrame(Rect outRect) { 7544 if (mAttachInfo != null) { 7545 try { 7546 mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); 7547 } catch (RemoteException e) { 7548 return; 7549 } 7550 // XXX This is really broken, and probably all needs to be done 7551 // in the window manager, and we need to know more about whether 7552 // we want the area behind or in front of the IME. 7553 final Rect insets = mAttachInfo.mVisibleInsets; 7554 outRect.left += insets.left; 7555 outRect.top += insets.top; 7556 outRect.right -= insets.right; 7557 outRect.bottom -= insets.bottom; 7558 return; 7559 } 7560 // The view is not attached to a display so we don't have a context. 7561 // Make a best guess about the display size. 7562 Display d = DisplayManagerGlobal.getInstance().getRealDisplay(Display.DEFAULT_DISPLAY); 7563 d.getRectSize(outRect); 7564 } 7565 7566 /** 7567 * Dispatch a notification about a resource configuration change down 7568 * the view hierarchy. 7569 * ViewGroups should override to route to their children. 7570 * 7571 * @param newConfig The new resource configuration. 7572 * 7573 * @see #onConfigurationChanged(android.content.res.Configuration) 7574 */ 7575 public void dispatchConfigurationChanged(Configuration newConfig) { 7576 onConfigurationChanged(newConfig); 7577 } 7578 7579 /** 7580 * Called when the current configuration of the resources being used 7581 * by the application have changed. You can use this to decide when 7582 * to reload resources that can changed based on orientation and other 7583 * configuration characterstics. You only need to use this if you are 7584 * not relying on the normal {@link android.app.Activity} mechanism of 7585 * recreating the activity instance upon a configuration change. 7586 * 7587 * @param newConfig The new resource configuration. 7588 */ 7589 protected void onConfigurationChanged(Configuration newConfig) { 7590 } 7591 7592 /** 7593 * Private function to aggregate all per-view attributes in to the view 7594 * root. 7595 */ 7596 void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) { 7597 performCollectViewAttributes(attachInfo, visibility); 7598 } 7599 7600 void performCollectViewAttributes(AttachInfo attachInfo, int visibility) { 7601 if ((visibility & VISIBILITY_MASK) == VISIBLE) { 7602 if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { 7603 attachInfo.mKeepScreenOn = true; 7604 } 7605 attachInfo.mSystemUiVisibility |= mSystemUiVisibility; 7606 ListenerInfo li = mListenerInfo; 7607 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 7608 attachInfo.mHasSystemUiListeners = true; 7609 } 7610 } 7611 } 7612 7613 void needGlobalAttributesUpdate(boolean force) { 7614 final AttachInfo ai = mAttachInfo; 7615 if (ai != null && !ai.mRecomputeGlobalAttributes) { 7616 if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) 7617 || ai.mHasSystemUiListeners) { 7618 ai.mRecomputeGlobalAttributes = true; 7619 } 7620 } 7621 } 7622 7623 /** 7624 * Returns whether the device is currently in touch mode. Touch mode is entered 7625 * once the user begins interacting with the device by touch, and affects various 7626 * things like whether focus is always visible to the user. 7627 * 7628 * @return Whether the device is in touch mode. 7629 */ 7630 @ViewDebug.ExportedProperty 7631 public boolean isInTouchMode() { 7632 if (mAttachInfo != null) { 7633 return mAttachInfo.mInTouchMode; 7634 } else { 7635 return ViewRootImpl.isInTouchMode(); 7636 } 7637 } 7638 7639 /** 7640 * Returns the context the view is running in, through which it can 7641 * access the current theme, resources, etc. 7642 * 7643 * @return The view's Context. 7644 */ 7645 @ViewDebug.CapturedViewProperty 7646 public final Context getContext() { 7647 return mContext; 7648 } 7649 7650 /** 7651 * Handle a key event before it is processed by any input method 7652 * associated with the view hierarchy. This can be used to intercept 7653 * key events in special situations before the IME consumes them; a 7654 * typical example would be handling the BACK key to update the application's 7655 * UI instead of allowing the IME to see it and close itself. 7656 * 7657 * @param keyCode The value in event.getKeyCode(). 7658 * @param event Description of the key event. 7659 * @return If you handled the event, return true. If you want to allow the 7660 * event to be handled by the next receiver, return false. 7661 */ 7662 public boolean onKeyPreIme(int keyCode, KeyEvent event) { 7663 return false; 7664 } 7665 7666 /** 7667 * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) 7668 * KeyEvent.Callback.onKeyDown()}: perform press of the view 7669 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} 7670 * is released, if the view is enabled and clickable. 7671 * 7672 * <p>Key presses in software keyboards will generally NOT trigger this listener, 7673 * although some may elect to do so in some situations. Do not rely on this to 7674 * catch software key presses. 7675 * 7676 * @param keyCode A key code that represents the button pressed, from 7677 * {@link android.view.KeyEvent}. 7678 * @param event The KeyEvent object that defines the button action. 7679 */ 7680 public boolean onKeyDown(int keyCode, KeyEvent event) { 7681 boolean result = false; 7682 7683 switch (keyCode) { 7684 case KeyEvent.KEYCODE_DPAD_CENTER: 7685 case KeyEvent.KEYCODE_ENTER: { 7686 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 7687 return true; 7688 } 7689 // Long clickable items don't necessarily have to be clickable 7690 if (((mViewFlags & CLICKABLE) == CLICKABLE || 7691 (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && 7692 (event.getRepeatCount() == 0)) { 7693 setPressed(true); 7694 checkForLongClick(0); 7695 return true; 7696 } 7697 break; 7698 } 7699 } 7700 return result; 7701 } 7702 7703 /** 7704 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 7705 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 7706 * the event). 7707 * <p>Key presses in software keyboards will generally NOT trigger this listener, 7708 * although some may elect to do so in some situations. Do not rely on this to 7709 * catch software key presses. 7710 */ 7711 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 7712 return false; 7713 } 7714 7715 /** 7716 * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) 7717 * KeyEvent.Callback.onKeyUp()}: perform clicking of the view 7718 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or 7719 * {@link KeyEvent#KEYCODE_ENTER} is released. 7720 * <p>Key presses in software keyboards will generally NOT trigger this listener, 7721 * although some may elect to do so in some situations. Do not rely on this to 7722 * catch software key presses. 7723 * 7724 * @param keyCode A key code that represents the button pressed, from 7725 * {@link android.view.KeyEvent}. 7726 * @param event The KeyEvent object that defines the button action. 7727 */ 7728 public boolean onKeyUp(int keyCode, KeyEvent event) { 7729 boolean result = false; 7730 7731 switch (keyCode) { 7732 case KeyEvent.KEYCODE_DPAD_CENTER: 7733 case KeyEvent.KEYCODE_ENTER: { 7734 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 7735 return true; 7736 } 7737 if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { 7738 setPressed(false); 7739 7740 if (!mHasPerformedLongPress) { 7741 // This is a tap, so remove the longpress check 7742 removeLongPressCallback(); 7743 7744 result = performClick(); 7745 } 7746 } 7747 break; 7748 } 7749 } 7750 return result; 7751 } 7752 7753 /** 7754 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 7755 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 7756 * the event). 7757 * <p>Key presses in software keyboards will generally NOT trigger this listener, 7758 * although some may elect to do so in some situations. Do not rely on this to 7759 * catch software key presses. 7760 * 7761 * @param keyCode A key code that represents the button pressed, from 7762 * {@link android.view.KeyEvent}. 7763 * @param repeatCount The number of times the action was made. 7764 * @param event The KeyEvent object that defines the button action. 7765 */ 7766 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 7767 return false; 7768 } 7769 7770 /** 7771 * Called on the focused view when a key shortcut event is not handled. 7772 * Override this method to implement local key shortcuts for the View. 7773 * Key shortcuts can also be implemented by setting the 7774 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 7775 * 7776 * @param keyCode The value in event.getKeyCode(). 7777 * @param event Description of the key event. 7778 * @return If you handled the event, return true. If you want to allow the 7779 * event to be handled by the next receiver, return false. 7780 */ 7781 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 7782 return false; 7783 } 7784 7785 /** 7786 * Check whether the called view is a text editor, in which case it 7787 * would make sense to automatically display a soft input window for 7788 * it. Subclasses should override this if they implement 7789 * {@link #onCreateInputConnection(EditorInfo)} to return true if 7790 * a call on that method would return a non-null InputConnection, and 7791 * they are really a first-class editor that the user would normally 7792 * start typing on when the go into a window containing your view. 7793 * 7794 * <p>The default implementation always returns false. This does 7795 * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} 7796 * will not be called or the user can not otherwise perform edits on your 7797 * view; it is just a hint to the system that this is not the primary 7798 * purpose of this view. 7799 * 7800 * @return Returns true if this view is a text editor, else false. 7801 */ 7802 public boolean onCheckIsTextEditor() { 7803 return false; 7804 } 7805 7806 /** 7807 * Create a new InputConnection for an InputMethod to interact 7808 * with the view. The default implementation returns null, since it doesn't 7809 * support input methods. You can override this to implement such support. 7810 * This is only needed for views that take focus and text input. 7811 * 7812 * <p>When implementing this, you probably also want to implement 7813 * {@link #onCheckIsTextEditor()} to indicate you will return a 7814 * non-null InputConnection. 7815 * 7816 * @param outAttrs Fill in with attribute information about the connection. 7817 */ 7818 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { 7819 return null; 7820 } 7821 7822 /** 7823 * Called by the {@link android.view.inputmethod.InputMethodManager} 7824 * when a view who is not the current 7825 * input connection target is trying to make a call on the manager. The 7826 * default implementation returns false; you can override this to return 7827 * true for certain views if you are performing InputConnection proxying 7828 * to them. 7829 * @param view The View that is making the InputMethodManager call. 7830 * @return Return true to allow the call, false to reject. 7831 */ 7832 public boolean checkInputConnectionProxy(View view) { 7833 return false; 7834 } 7835 7836 /** 7837 * Show the context menu for this view. It is not safe to hold on to the 7838 * menu after returning from this method. 7839 * 7840 * You should normally not overload this method. Overload 7841 * {@link #onCreateContextMenu(ContextMenu)} or define an 7842 * {@link OnCreateContextMenuListener} to add items to the context menu. 7843 * 7844 * @param menu The context menu to populate 7845 */ 7846 public void createContextMenu(ContextMenu menu) { 7847 ContextMenuInfo menuInfo = getContextMenuInfo(); 7848 7849 // Sets the current menu info so all items added to menu will have 7850 // my extra info set. 7851 ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); 7852 7853 onCreateContextMenu(menu); 7854 ListenerInfo li = mListenerInfo; 7855 if (li != null && li.mOnCreateContextMenuListener != null) { 7856 li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); 7857 } 7858 7859 // Clear the extra information so subsequent items that aren't mine don't 7860 // have my extra info. 7861 ((MenuBuilder)menu).setCurrentMenuInfo(null); 7862 7863 if (mParent != null) { 7864 mParent.createContextMenu(menu); 7865 } 7866 } 7867 7868 /** 7869 * Views should implement this if they have extra information to associate 7870 * with the context menu. The return result is supplied as a parameter to 7871 * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} 7872 * callback. 7873 * 7874 * @return Extra information about the item for which the context menu 7875 * should be shown. This information will vary across different 7876 * subclasses of View. 7877 */ 7878 protected ContextMenuInfo getContextMenuInfo() { 7879 return null; 7880 } 7881 7882 /** 7883 * Views should implement this if the view itself is going to add items to 7884 * the context menu. 7885 * 7886 * @param menu the context menu to populate 7887 */ 7888 protected void onCreateContextMenu(ContextMenu menu) { 7889 } 7890 7891 /** 7892 * Implement this method to handle trackball motion events. The 7893 * <em>relative</em> movement of the trackball since the last event 7894 * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and 7895 * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so 7896 * that a movement of 1 corresponds to the user pressing one DPAD key (so 7897 * they will often be fractional values, representing the more fine-grained 7898 * movement information available from a trackball). 7899 * 7900 * @param event The motion event. 7901 * @return True if the event was handled, false otherwise. 7902 */ 7903 public boolean onTrackballEvent(MotionEvent event) { 7904 return false; 7905 } 7906 7907 /** 7908 * Implement this method to handle generic motion events. 7909 * <p> 7910 * Generic motion events describe joystick movements, mouse hovers, track pad 7911 * touches, scroll wheel movements and other input events. The 7912 * {@link MotionEvent#getSource() source} of the motion event specifies 7913 * the class of input that was received. Implementations of this method 7914 * must examine the bits in the source before processing the event. 7915 * The following code example shows how this is done. 7916 * </p><p> 7917 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 7918 * are delivered to the view under the pointer. All other generic motion events are 7919 * delivered to the focused view. 7920 * </p> 7921 * <pre> public boolean onGenericMotionEvent(MotionEvent event) { 7922 * if ((event.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) { 7923 * if (event.getAction() == MotionEvent.ACTION_MOVE) { 7924 * // process the joystick movement... 7925 * return true; 7926 * } 7927 * } 7928 * if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 7929 * switch (event.getAction()) { 7930 * case MotionEvent.ACTION_HOVER_MOVE: 7931 * // process the mouse hover movement... 7932 * return true; 7933 * case MotionEvent.ACTION_SCROLL: 7934 * // process the scroll wheel movement... 7935 * return true; 7936 * } 7937 * } 7938 * return super.onGenericMotionEvent(event); 7939 * }</pre> 7940 * 7941 * @param event The generic motion event being processed. 7942 * @return True if the event was handled, false otherwise. 7943 */ 7944 public boolean onGenericMotionEvent(MotionEvent event) { 7945 return false; 7946 } 7947 7948 /** 7949 * Implement this method to handle hover events. 7950 * <p> 7951 * This method is called whenever a pointer is hovering into, over, or out of the 7952 * bounds of a view and the view is not currently being touched. 7953 * Hover events are represented as pointer events with action 7954 * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, 7955 * or {@link MotionEvent#ACTION_HOVER_EXIT}. 7956 * </p> 7957 * <ul> 7958 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} 7959 * when the pointer enters the bounds of the view.</li> 7960 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} 7961 * when the pointer has already entered the bounds of the view and has moved.</li> 7962 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} 7963 * when the pointer has exited the bounds of the view or when the pointer is 7964 * about to go down due to a button click, tap, or similar user action that 7965 * causes the view to be touched.</li> 7966 * </ul> 7967 * <p> 7968 * The view should implement this method to return true to indicate that it is 7969 * handling the hover event, such as by changing its drawable state. 7970 * </p><p> 7971 * The default implementation calls {@link #setHovered} to update the hovered state 7972 * of the view when a hover enter or hover exit event is received, if the view 7973 * is enabled and is clickable. The default implementation also sends hover 7974 * accessibility events. 7975 * </p> 7976 * 7977 * @param event The motion event that describes the hover. 7978 * @return True if the view handled the hover event. 7979 * 7980 * @see #isHovered 7981 * @see #setHovered 7982 * @see #onHoverChanged 7983 */ 7984 public boolean onHoverEvent(MotionEvent event) { 7985 // The root view may receive hover (or touch) events that are outside the bounds of 7986 // the window. This code ensures that we only send accessibility events for 7987 // hovers that are actually within the bounds of the root view. 7988 final int action = event.getActionMasked(); 7989 if (!mSendingHoverAccessibilityEvents) { 7990 if ((action == MotionEvent.ACTION_HOVER_ENTER 7991 || action == MotionEvent.ACTION_HOVER_MOVE) 7992 && !hasHoveredChild() 7993 && pointInView(event.getX(), event.getY())) { 7994 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 7995 mSendingHoverAccessibilityEvents = true; 7996 } 7997 } else { 7998 if (action == MotionEvent.ACTION_HOVER_EXIT 7999 || (action == MotionEvent.ACTION_MOVE 8000 && !pointInView(event.getX(), event.getY()))) { 8001 mSendingHoverAccessibilityEvents = false; 8002 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 8003 // If the window does not have input focus we take away accessibility 8004 // focus as soon as the user stop hovering over the view. 8005 if (mAttachInfo != null && !mAttachInfo.mHasWindowFocus) { 8006 getViewRootImpl().setAccessibilityFocus(null, null); 8007 } 8008 } 8009 } 8010 8011 if (isHoverable()) { 8012 switch (action) { 8013 case MotionEvent.ACTION_HOVER_ENTER: 8014 setHovered(true); 8015 break; 8016 case MotionEvent.ACTION_HOVER_EXIT: 8017 setHovered(false); 8018 break; 8019 } 8020 8021 // Dispatch the event to onGenericMotionEvent before returning true. 8022 // This is to provide compatibility with existing applications that 8023 // handled HOVER_MOVE events in onGenericMotionEvent and that would 8024 // break because of the new default handling for hoverable views 8025 // in onHoverEvent. 8026 // Note that onGenericMotionEvent will be called by default when 8027 // onHoverEvent returns false (refer to dispatchGenericMotionEvent). 8028 dispatchGenericMotionEventInternal(event); 8029 return true; 8030 } 8031 8032 return false; 8033 } 8034 8035 /** 8036 * Returns true if the view should handle {@link #onHoverEvent} 8037 * by calling {@link #setHovered} to change its hovered state. 8038 * 8039 * @return True if the view is hoverable. 8040 */ 8041 private boolean isHoverable() { 8042 final int viewFlags = mViewFlags; 8043 if ((viewFlags & ENABLED_MASK) == DISABLED) { 8044 return false; 8045 } 8046 8047 return (viewFlags & CLICKABLE) == CLICKABLE 8048 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 8049 } 8050 8051 /** 8052 * Returns true if the view is currently hovered. 8053 * 8054 * @return True if the view is currently hovered. 8055 * 8056 * @see #setHovered 8057 * @see #onHoverChanged 8058 */ 8059 @ViewDebug.ExportedProperty 8060 public boolean isHovered() { 8061 return (mPrivateFlags & PFLAG_HOVERED) != 0; 8062 } 8063 8064 /** 8065 * Sets whether the view is currently hovered. 8066 * <p> 8067 * Calling this method also changes the drawable state of the view. This 8068 * enables the view to react to hover by using different drawable resources 8069 * to change its appearance. 8070 * </p><p> 8071 * The {@link #onHoverChanged} method is called when the hovered state changes. 8072 * </p> 8073 * 8074 * @param hovered True if the view is hovered. 8075 * 8076 * @see #isHovered 8077 * @see #onHoverChanged 8078 */ 8079 public void setHovered(boolean hovered) { 8080 if (hovered) { 8081 if ((mPrivateFlags & PFLAG_HOVERED) == 0) { 8082 mPrivateFlags |= PFLAG_HOVERED; 8083 refreshDrawableState(); 8084 onHoverChanged(true); 8085 } 8086 } else { 8087 if ((mPrivateFlags & PFLAG_HOVERED) != 0) { 8088 mPrivateFlags &= ~PFLAG_HOVERED; 8089 refreshDrawableState(); 8090 onHoverChanged(false); 8091 } 8092 } 8093 } 8094 8095 /** 8096 * Implement this method to handle hover state changes. 8097 * <p> 8098 * This method is called whenever the hover state changes as a result of a 8099 * call to {@link #setHovered}. 8100 * </p> 8101 * 8102 * @param hovered The current hover state, as returned by {@link #isHovered}. 8103 * 8104 * @see #isHovered 8105 * @see #setHovered 8106 */ 8107 public void onHoverChanged(boolean hovered) { 8108 } 8109 8110 /** 8111 * Implement this method to handle touch screen motion events. 8112 * 8113 * @param event The motion event. 8114 * @return True if the event was handled, false otherwise. 8115 */ 8116 public boolean onTouchEvent(MotionEvent event) { 8117 final int viewFlags = mViewFlags; 8118 8119 if ((viewFlags & ENABLED_MASK) == DISABLED) { 8120 if (event.getAction() == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) { 8121 setPressed(false); 8122 } 8123 // A disabled view that is clickable still consumes the touch 8124 // events, it just doesn't respond to them. 8125 return (((viewFlags & CLICKABLE) == CLICKABLE || 8126 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)); 8127 } 8128 8129 if (mTouchDelegate != null) { 8130 if (mTouchDelegate.onTouchEvent(event)) { 8131 return true; 8132 } 8133 } 8134 8135 if (((viewFlags & CLICKABLE) == CLICKABLE || 8136 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) { 8137 switch (event.getAction()) { 8138 case MotionEvent.ACTION_UP: 8139 boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; 8140 if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { 8141 // take focus if we don't have it already and we should in 8142 // touch mode. 8143 boolean focusTaken = false; 8144 if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { 8145 focusTaken = requestFocus(); 8146 } 8147 8148 if (prepressed) { 8149 // The button is being released before we actually 8150 // showed it as pressed. Make it show the pressed 8151 // state now (before scheduling the click) to ensure 8152 // the user sees it. 8153 setPressed(true); 8154 } 8155 8156 if (!mHasPerformedLongPress) { 8157 // This is a tap, so remove the longpress check 8158 removeLongPressCallback(); 8159 8160 // Only perform take click actions if we were in the pressed state 8161 if (!focusTaken) { 8162 // Use a Runnable and post this rather than calling 8163 // performClick directly. This lets other visual state 8164 // of the view update before click actions start. 8165 if (mPerformClick == null) { 8166 mPerformClick = new PerformClick(); 8167 } 8168 if (!post(mPerformClick)) { 8169 performClick(); 8170 } 8171 } 8172 } 8173 8174 if (mUnsetPressedState == null) { 8175 mUnsetPressedState = new UnsetPressedState(); 8176 } 8177 8178 if (prepressed) { 8179 postDelayed(mUnsetPressedState, 8180 ViewConfiguration.getPressedStateDuration()); 8181 } else if (!post(mUnsetPressedState)) { 8182 // If the post failed, unpress right now 8183 mUnsetPressedState.run(); 8184 } 8185 removeTapCallback(); 8186 } 8187 break; 8188 8189 case MotionEvent.ACTION_DOWN: 8190 mHasPerformedLongPress = false; 8191 8192 if (performButtonActionOnTouchDown(event)) { 8193 break; 8194 } 8195 8196 // Walk up the hierarchy to determine if we're inside a scrolling container. 8197 boolean isInScrollingContainer = isInScrollingContainer(); 8198 8199 // For views inside a scrolling container, delay the pressed feedback for 8200 // a short period in case this is a scroll. 8201 if (isInScrollingContainer) { 8202 mPrivateFlags |= PFLAG_PREPRESSED; 8203 if (mPendingCheckForTap == null) { 8204 mPendingCheckForTap = new CheckForTap(); 8205 } 8206 postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); 8207 } else { 8208 // Not inside a scrolling container, so show the feedback right away 8209 setPressed(true); 8210 checkForLongClick(0); 8211 } 8212 break; 8213 8214 case MotionEvent.ACTION_CANCEL: 8215 setPressed(false); 8216 removeTapCallback(); 8217 break; 8218 8219 case MotionEvent.ACTION_MOVE: 8220 final int x = (int) event.getX(); 8221 final int y = (int) event.getY(); 8222 8223 // Be lenient about moving outside of buttons 8224 if (!pointInView(x, y, mTouchSlop)) { 8225 // Outside button 8226 removeTapCallback(); 8227 if ((mPrivateFlags & PFLAG_PRESSED) != 0) { 8228 // Remove any future long press/tap checks 8229 removeLongPressCallback(); 8230 8231 setPressed(false); 8232 } 8233 } 8234 break; 8235 } 8236 return true; 8237 } 8238 8239 return false; 8240 } 8241 8242 /** 8243 * @hide 8244 */ 8245 public boolean isInScrollingContainer() { 8246 ViewParent p = getParent(); 8247 while (p != null && p instanceof ViewGroup) { 8248 if (((ViewGroup) p).shouldDelayChildPressedState()) { 8249 return true; 8250 } 8251 p = p.getParent(); 8252 } 8253 return false; 8254 } 8255 8256 /** 8257 * Remove the longpress detection timer. 8258 */ 8259 private void removeLongPressCallback() { 8260 if (mPendingCheckForLongPress != null) { 8261 removeCallbacks(mPendingCheckForLongPress); 8262 } 8263 } 8264 8265 /** 8266 * Remove the pending click action 8267 */ 8268 private void removePerformClickCallback() { 8269 if (mPerformClick != null) { 8270 removeCallbacks(mPerformClick); 8271 } 8272 } 8273 8274 /** 8275 * Remove the prepress detection timer. 8276 */ 8277 private void removeUnsetPressCallback() { 8278 if ((mPrivateFlags & PFLAG_PRESSED) != 0 && mUnsetPressedState != null) { 8279 setPressed(false); 8280 removeCallbacks(mUnsetPressedState); 8281 } 8282 } 8283 8284 /** 8285 * Remove the tap detection timer. 8286 */ 8287 private void removeTapCallback() { 8288 if (mPendingCheckForTap != null) { 8289 mPrivateFlags &= ~PFLAG_PREPRESSED; 8290 removeCallbacks(mPendingCheckForTap); 8291 } 8292 } 8293 8294 /** 8295 * Cancels a pending long press. Your subclass can use this if you 8296 * want the context menu to come up if the user presses and holds 8297 * at the same place, but you don't want it to come up if they press 8298 * and then move around enough to cause scrolling. 8299 */ 8300 public void cancelLongPress() { 8301 removeLongPressCallback(); 8302 8303 /* 8304 * The prepressed state handled by the tap callback is a display 8305 * construct, but the tap callback will post a long press callback 8306 * less its own timeout. Remove it here. 8307 */ 8308 removeTapCallback(); 8309 } 8310 8311 /** 8312 * Remove the pending callback for sending a 8313 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 8314 */ 8315 private void removeSendViewScrolledAccessibilityEventCallback() { 8316 if (mSendViewScrolledAccessibilityEvent != null) { 8317 removeCallbacks(mSendViewScrolledAccessibilityEvent); 8318 mSendViewScrolledAccessibilityEvent.mIsPending = false; 8319 } 8320 } 8321 8322 /** 8323 * Sets the TouchDelegate for this View. 8324 */ 8325 public void setTouchDelegate(TouchDelegate delegate) { 8326 mTouchDelegate = delegate; 8327 } 8328 8329 /** 8330 * Gets the TouchDelegate for this View. 8331 */ 8332 public TouchDelegate getTouchDelegate() { 8333 return mTouchDelegate; 8334 } 8335 8336 /** 8337 * Set flags controlling behavior of this view. 8338 * 8339 * @param flags Constant indicating the value which should be set 8340 * @param mask Constant indicating the bit range that should be changed 8341 */ 8342 void setFlags(int flags, int mask) { 8343 int old = mViewFlags; 8344 mViewFlags = (mViewFlags & ~mask) | (flags & mask); 8345 8346 int changed = mViewFlags ^ old; 8347 if (changed == 0) { 8348 return; 8349 } 8350 int privateFlags = mPrivateFlags; 8351 8352 /* Check if the FOCUSABLE bit has changed */ 8353 if (((changed & FOCUSABLE_MASK) != 0) && 8354 ((privateFlags & PFLAG_HAS_BOUNDS) !=0)) { 8355 if (((old & FOCUSABLE_MASK) == FOCUSABLE) 8356 && ((privateFlags & PFLAG_FOCUSED) != 0)) { 8357 /* Give up focus if we are no longer focusable */ 8358 clearFocus(); 8359 } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) 8360 && ((privateFlags & PFLAG_FOCUSED) == 0)) { 8361 /* 8362 * Tell the view system that we are now available to take focus 8363 * if no one else already has it. 8364 */ 8365 if (mParent != null) mParent.focusableViewAvailable(this); 8366 } 8367 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 8368 notifyAccessibilityStateChanged(); 8369 } 8370 } 8371 8372 if ((flags & VISIBILITY_MASK) == VISIBLE) { 8373 if ((changed & VISIBILITY_MASK) != 0) { 8374 /* 8375 * If this view is becoming visible, invalidate it in case it changed while 8376 * it was not visible. Marking it drawn ensures that the invalidation will 8377 * go through. 8378 */ 8379 mPrivateFlags |= PFLAG_DRAWN; 8380 invalidate(true); 8381 8382 needGlobalAttributesUpdate(true); 8383 8384 // a view becoming visible is worth notifying the parent 8385 // about in case nothing has focus. even if this specific view 8386 // isn't focusable, it may contain something that is, so let 8387 // the root view try to give this focus if nothing else does. 8388 if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { 8389 mParent.focusableViewAvailable(this); 8390 } 8391 } 8392 } 8393 8394 /* Check if the GONE bit has changed */ 8395 if ((changed & GONE) != 0) { 8396 needGlobalAttributesUpdate(false); 8397 requestLayout(); 8398 8399 if (((mViewFlags & VISIBILITY_MASK) == GONE)) { 8400 if (hasFocus()) clearFocus(); 8401 clearAccessibilityFocus(); 8402 destroyDrawingCache(); 8403 if (mParent instanceof View) { 8404 // GONE views noop invalidation, so invalidate the parent 8405 ((View) mParent).invalidate(true); 8406 } 8407 // Mark the view drawn to ensure that it gets invalidated properly the next 8408 // time it is visible and gets invalidated 8409 mPrivateFlags |= PFLAG_DRAWN; 8410 } 8411 if (mAttachInfo != null) { 8412 mAttachInfo.mViewVisibilityChanged = true; 8413 } 8414 } 8415 8416 /* Check if the VISIBLE bit has changed */ 8417 if ((changed & INVISIBLE) != 0) { 8418 needGlobalAttributesUpdate(false); 8419 /* 8420 * If this view is becoming invisible, set the DRAWN flag so that 8421 * the next invalidate() will not be skipped. 8422 */ 8423 mPrivateFlags |= PFLAG_DRAWN; 8424 8425 if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE) && hasFocus()) { 8426 // root view becoming invisible shouldn't clear focus and accessibility focus 8427 if (getRootView() != this) { 8428 clearFocus(); 8429 clearAccessibilityFocus(); 8430 } 8431 } 8432 if (mAttachInfo != null) { 8433 mAttachInfo.mViewVisibilityChanged = true; 8434 } 8435 } 8436 8437 if ((changed & VISIBILITY_MASK) != 0) { 8438 if (mParent instanceof ViewGroup) { 8439 ((ViewGroup) mParent).onChildVisibilityChanged(this, 8440 (changed & VISIBILITY_MASK), (flags & VISIBILITY_MASK)); 8441 ((View) mParent).invalidate(true); 8442 } else if (mParent != null) { 8443 mParent.invalidateChild(this, null); 8444 } 8445 dispatchVisibilityChanged(this, (flags & VISIBILITY_MASK)); 8446 } 8447 8448 if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { 8449 destroyDrawingCache(); 8450 } 8451 8452 if ((changed & DRAWING_CACHE_ENABLED) != 0) { 8453 destroyDrawingCache(); 8454 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 8455 invalidateParentCaches(); 8456 } 8457 8458 if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { 8459 destroyDrawingCache(); 8460 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 8461 } 8462 8463 if ((changed & DRAW_MASK) != 0) { 8464 if ((mViewFlags & WILL_NOT_DRAW) != 0) { 8465 if (mBackground != null) { 8466 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 8467 mPrivateFlags |= PFLAG_ONLY_DRAWS_BACKGROUND; 8468 } else { 8469 mPrivateFlags |= PFLAG_SKIP_DRAW; 8470 } 8471 } else { 8472 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 8473 } 8474 requestLayout(); 8475 invalidate(true); 8476 } 8477 8478 if ((changed & KEEP_SCREEN_ON) != 0) { 8479 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 8480 mParent.recomputeViewAttributes(this); 8481 } 8482 } 8483 8484 if (AccessibilityManager.getInstance(mContext).isEnabled() 8485 && ((changed & FOCUSABLE) != 0 || (changed & CLICKABLE) != 0 8486 || (changed & LONG_CLICKABLE) != 0 || (changed & ENABLED) != 0)) { 8487 notifyAccessibilityStateChanged(); 8488 } 8489 } 8490 8491 /** 8492 * Change the view's z order in the tree, so it's on top of other sibling 8493 * views 8494 */ 8495 public void bringToFront() { 8496 if (mParent != null) { 8497 mParent.bringChildToFront(this); 8498 } 8499 } 8500 8501 /** 8502 * This is called in response to an internal scroll in this view (i.e., the 8503 * view scrolled its own contents). This is typically as a result of 8504 * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been 8505 * called. 8506 * 8507 * @param l Current horizontal scroll origin. 8508 * @param t Current vertical scroll origin. 8509 * @param oldl Previous horizontal scroll origin. 8510 * @param oldt Previous vertical scroll origin. 8511 */ 8512 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 8513 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 8514 postSendViewScrolledAccessibilityEventCallback(); 8515 } 8516 8517 mBackgroundSizeChanged = true; 8518 8519 final AttachInfo ai = mAttachInfo; 8520 if (ai != null) { 8521 ai.mViewScrollChanged = true; 8522 } 8523 } 8524 8525 /** 8526 * Interface definition for a callback to be invoked when the layout bounds of a view 8527 * changes due to layout processing. 8528 */ 8529 public interface OnLayoutChangeListener { 8530 /** 8531 * Called when the focus state of a view has changed. 8532 * 8533 * @param v The view whose state has changed. 8534 * @param left The new value of the view's left property. 8535 * @param top The new value of the view's top property. 8536 * @param right The new value of the view's right property. 8537 * @param bottom The new value of the view's bottom property. 8538 * @param oldLeft The previous value of the view's left property. 8539 * @param oldTop The previous value of the view's top property. 8540 * @param oldRight The previous value of the view's right property. 8541 * @param oldBottom The previous value of the view's bottom property. 8542 */ 8543 void onLayoutChange(View v, int left, int top, int right, int bottom, 8544 int oldLeft, int oldTop, int oldRight, int oldBottom); 8545 } 8546 8547 /** 8548 * This is called during layout when the size of this view has changed. If 8549 * you were just added to the view hierarchy, you're called with the old 8550 * values of 0. 8551 * 8552 * @param w Current width of this view. 8553 * @param h Current height of this view. 8554 * @param oldw Old width of this view. 8555 * @param oldh Old height of this view. 8556 */ 8557 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 8558 } 8559 8560 /** 8561 * Called by draw to draw the child views. This may be overridden 8562 * by derived classes to gain control just before its children are drawn 8563 * (but after its own view has been drawn). 8564 * @param canvas the canvas on which to draw the view 8565 */ 8566 protected void dispatchDraw(Canvas canvas) { 8567 8568 } 8569 8570 /** 8571 * Gets the parent of this view. Note that the parent is a 8572 * ViewParent and not necessarily a View. 8573 * 8574 * @return Parent of this view. 8575 */ 8576 public final ViewParent getParent() { 8577 return mParent; 8578 } 8579 8580 /** 8581 * Set the horizontal scrolled position of your view. This will cause a call to 8582 * {@link #onScrollChanged(int, int, int, int)} and the view will be 8583 * invalidated. 8584 * @param value the x position to scroll to 8585 */ 8586 public void setScrollX(int value) { 8587 scrollTo(value, mScrollY); 8588 } 8589 8590 /** 8591 * Set the vertical scrolled position of your view. This will cause a call to 8592 * {@link #onScrollChanged(int, int, int, int)} and the view will be 8593 * invalidated. 8594 * @param value the y position to scroll to 8595 */ 8596 public void setScrollY(int value) { 8597 scrollTo(mScrollX, value); 8598 } 8599 8600 /** 8601 * Return the scrolled left position of this view. This is the left edge of 8602 * the displayed part of your view. You do not need to draw any pixels 8603 * farther left, since those are outside of the frame of your view on 8604 * screen. 8605 * 8606 * @return The left edge of the displayed part of your view, in pixels. 8607 */ 8608 public final int getScrollX() { 8609 return mScrollX; 8610 } 8611 8612 /** 8613 * Return the scrolled top position of this view. This is the top edge of 8614 * the displayed part of your view. You do not need to draw any pixels above 8615 * it, since those are outside of the frame of your view on screen. 8616 * 8617 * @return The top edge of the displayed part of your view, in pixels. 8618 */ 8619 public final int getScrollY() { 8620 return mScrollY; 8621 } 8622 8623 /** 8624 * Return the width of the your view. 8625 * 8626 * @return The width of your view, in pixels. 8627 */ 8628 @ViewDebug.ExportedProperty(category = "layout") 8629 public final int getWidth() { 8630 return mRight - mLeft; 8631 } 8632 8633 /** 8634 * Return the height of your view. 8635 * 8636 * @return The height of your view, in pixels. 8637 */ 8638 @ViewDebug.ExportedProperty(category = "layout") 8639 public final int getHeight() { 8640 return mBottom - mTop; 8641 } 8642 8643 /** 8644 * Return the visible drawing bounds of your view. Fills in the output 8645 * rectangle with the values from getScrollX(), getScrollY(), 8646 * getWidth(), and getHeight(). 8647 * 8648 * @param outRect The (scrolled) drawing bounds of the view. 8649 */ 8650 public void getDrawingRect(Rect outRect) { 8651 outRect.left = mScrollX; 8652 outRect.top = mScrollY; 8653 outRect.right = mScrollX + (mRight - mLeft); 8654 outRect.bottom = mScrollY + (mBottom - mTop); 8655 } 8656 8657 /** 8658 * Like {@link #getMeasuredWidthAndState()}, but only returns the 8659 * raw width component (that is the result is masked by 8660 * {@link #MEASURED_SIZE_MASK}). 8661 * 8662 * @return The raw measured width of this view. 8663 */ 8664 public final int getMeasuredWidth() { 8665 return mMeasuredWidth & MEASURED_SIZE_MASK; 8666 } 8667 8668 /** 8669 * Return the full width measurement information for this view as computed 8670 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 8671 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 8672 * This should be used during measurement and layout calculations only. Use 8673 * {@link #getWidth()} to see how wide a view is after layout. 8674 * 8675 * @return The measured width of this view as a bit mask. 8676 */ 8677 public final int getMeasuredWidthAndState() { 8678 return mMeasuredWidth; 8679 } 8680 8681 /** 8682 * Like {@link #getMeasuredHeightAndState()}, but only returns the 8683 * raw width component (that is the result is masked by 8684 * {@link #MEASURED_SIZE_MASK}). 8685 * 8686 * @return The raw measured height of this view. 8687 */ 8688 public final int getMeasuredHeight() { 8689 return mMeasuredHeight & MEASURED_SIZE_MASK; 8690 } 8691 8692 /** 8693 * Return the full height measurement information for this view as computed 8694 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 8695 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 8696 * This should be used during measurement and layout calculations only. Use 8697 * {@link #getHeight()} to see how wide a view is after layout. 8698 * 8699 * @return The measured width of this view as a bit mask. 8700 */ 8701 public final int getMeasuredHeightAndState() { 8702 return mMeasuredHeight; 8703 } 8704 8705 /** 8706 * Return only the state bits of {@link #getMeasuredWidthAndState()} 8707 * and {@link #getMeasuredHeightAndState()}, combined into one integer. 8708 * The width component is in the regular bits {@link #MEASURED_STATE_MASK} 8709 * and the height component is at the shifted bits 8710 * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. 8711 */ 8712 public final int getMeasuredState() { 8713 return (mMeasuredWidth&MEASURED_STATE_MASK) 8714 | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) 8715 & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); 8716 } 8717 8718 /** 8719 * The transform matrix of this view, which is calculated based on the current 8720 * roation, scale, and pivot properties. 8721 * 8722 * @see #getRotation() 8723 * @see #getScaleX() 8724 * @see #getScaleY() 8725 * @see #getPivotX() 8726 * @see #getPivotY() 8727 * @return The current transform matrix for the view 8728 */ 8729 public Matrix getMatrix() { 8730 if (mTransformationInfo != null) { 8731 updateMatrix(); 8732 return mTransformationInfo.mMatrix; 8733 } 8734 return Matrix.IDENTITY_MATRIX; 8735 } 8736 8737 /** 8738 * Utility function to determine if the value is far enough away from zero to be 8739 * considered non-zero. 8740 * @param value A floating point value to check for zero-ness 8741 * @return whether the passed-in value is far enough away from zero to be considered non-zero 8742 */ 8743 private static boolean nonzero(float value) { 8744 return (value < -NONZERO_EPSILON || value > NONZERO_EPSILON); 8745 } 8746 8747 /** 8748 * Returns true if the transform matrix is the identity matrix. 8749 * Recomputes the matrix if necessary. 8750 * 8751 * @return True if the transform matrix is the identity matrix, false otherwise. 8752 */ 8753 final boolean hasIdentityMatrix() { 8754 if (mTransformationInfo != null) { 8755 updateMatrix(); 8756 return mTransformationInfo.mMatrixIsIdentity; 8757 } 8758 return true; 8759 } 8760 8761 void ensureTransformationInfo() { 8762 if (mTransformationInfo == null) { 8763 mTransformationInfo = new TransformationInfo(); 8764 } 8765 } 8766 8767 /** 8768 * Recomputes the transform matrix if necessary. 8769 */ 8770 private void updateMatrix() { 8771 final TransformationInfo info = mTransformationInfo; 8772 if (info == null) { 8773 return; 8774 } 8775 if (info.mMatrixDirty) { 8776 // transform-related properties have changed since the last time someone 8777 // asked for the matrix; recalculate it with the current values 8778 8779 // Figure out if we need to update the pivot point 8780 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 8781 if ((mRight - mLeft) != info.mPrevWidth || (mBottom - mTop) != info.mPrevHeight) { 8782 info.mPrevWidth = mRight - mLeft; 8783 info.mPrevHeight = mBottom - mTop; 8784 info.mPivotX = info.mPrevWidth / 2f; 8785 info.mPivotY = info.mPrevHeight / 2f; 8786 } 8787 } 8788 info.mMatrix.reset(); 8789 if (!nonzero(info.mRotationX) && !nonzero(info.mRotationY)) { 8790 info.mMatrix.setTranslate(info.mTranslationX, info.mTranslationY); 8791 info.mMatrix.preRotate(info.mRotation, info.mPivotX, info.mPivotY); 8792 info.mMatrix.preScale(info.mScaleX, info.mScaleY, info.mPivotX, info.mPivotY); 8793 } else { 8794 if (info.mCamera == null) { 8795 info.mCamera = new Camera(); 8796 info.matrix3D = new Matrix(); 8797 } 8798 info.mCamera.save(); 8799 info.mMatrix.preScale(info.mScaleX, info.mScaleY, info.mPivotX, info.mPivotY); 8800 info.mCamera.rotate(info.mRotationX, info.mRotationY, -info.mRotation); 8801 info.mCamera.getMatrix(info.matrix3D); 8802 info.matrix3D.preTranslate(-info.mPivotX, -info.mPivotY); 8803 info.matrix3D.postTranslate(info.mPivotX + info.mTranslationX, 8804 info.mPivotY + info.mTranslationY); 8805 info.mMatrix.postConcat(info.matrix3D); 8806 info.mCamera.restore(); 8807 } 8808 info.mMatrixDirty = false; 8809 info.mMatrixIsIdentity = info.mMatrix.isIdentity(); 8810 info.mInverseMatrixDirty = true; 8811 } 8812 } 8813 8814 /** 8815 * Utility method to retrieve the inverse of the current mMatrix property. 8816 * We cache the matrix to avoid recalculating it when transform properties 8817 * have not changed. 8818 * 8819 * @return The inverse of the current matrix of this view. 8820 */ 8821 final Matrix getInverseMatrix() { 8822 final TransformationInfo info = mTransformationInfo; 8823 if (info != null) { 8824 updateMatrix(); 8825 if (info.mInverseMatrixDirty) { 8826 if (info.mInverseMatrix == null) { 8827 info.mInverseMatrix = new Matrix(); 8828 } 8829 info.mMatrix.invert(info.mInverseMatrix); 8830 info.mInverseMatrixDirty = false; 8831 } 8832 return info.mInverseMatrix; 8833 } 8834 return Matrix.IDENTITY_MATRIX; 8835 } 8836 8837 /** 8838 * Gets the distance along the Z axis from the camera to this view. 8839 * 8840 * @see #setCameraDistance(float) 8841 * 8842 * @return The distance along the Z axis. 8843 */ 8844 public float getCameraDistance() { 8845 ensureTransformationInfo(); 8846 final float dpi = mResources.getDisplayMetrics().densityDpi; 8847 final TransformationInfo info = mTransformationInfo; 8848 if (info.mCamera == null) { 8849 info.mCamera = new Camera(); 8850 info.matrix3D = new Matrix(); 8851 } 8852 return -(info.mCamera.getLocationZ() * dpi); 8853 } 8854 8855 /** 8856 * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which 8857 * views are drawn) from the camera to this view. The camera's distance 8858 * affects 3D transformations, for instance rotations around the X and Y 8859 * axis. If the rotationX or rotationY properties are changed and this view is 8860 * large (more than half the size of the screen), it is recommended to always 8861 * use a camera distance that's greater than the height (X axis rotation) or 8862 * the width (Y axis rotation) of this view.</p> 8863 * 8864 * <p>The distance of the camera from the view plane can have an affect on the 8865 * perspective distortion of the view when it is rotated around the x or y axis. 8866 * For example, a large distance will result in a large viewing angle, and there 8867 * will not be much perspective distortion of the view as it rotates. A short 8868 * distance may cause much more perspective distortion upon rotation, and can 8869 * also result in some drawing artifacts if the rotated view ends up partially 8870 * behind the camera (which is why the recommendation is to use a distance at 8871 * least as far as the size of the view, if the view is to be rotated.)</p> 8872 * 8873 * <p>The distance is expressed in "depth pixels." The default distance depends 8874 * on the screen density. For instance, on a medium density display, the 8875 * default distance is 1280. On a high density display, the default distance 8876 * is 1920.</p> 8877 * 8878 * <p>If you want to specify a distance that leads to visually consistent 8879 * results across various densities, use the following formula:</p> 8880 * <pre> 8881 * float scale = context.getResources().getDisplayMetrics().density; 8882 * view.setCameraDistance(distance * scale); 8883 * </pre> 8884 * 8885 * <p>The density scale factor of a high density display is 1.5, 8886 * and 1920 = 1280 * 1.5.</p> 8887 * 8888 * @param distance The distance in "depth pixels", if negative the opposite 8889 * value is used 8890 * 8891 * @see #setRotationX(float) 8892 * @see #setRotationY(float) 8893 */ 8894 public void setCameraDistance(float distance) { 8895 invalidateViewProperty(true, false); 8896 8897 ensureTransformationInfo(); 8898 final float dpi = mResources.getDisplayMetrics().densityDpi; 8899 final TransformationInfo info = mTransformationInfo; 8900 if (info.mCamera == null) { 8901 info.mCamera = new Camera(); 8902 info.matrix3D = new Matrix(); 8903 } 8904 8905 info.mCamera.setLocation(0.0f, 0.0f, -Math.abs(distance) / dpi); 8906 info.mMatrixDirty = true; 8907 8908 invalidateViewProperty(false, false); 8909 if (mDisplayList != null) { 8910 mDisplayList.setCameraDistance(-Math.abs(distance) / dpi); 8911 } 8912 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 8913 // View was rejected last time it was drawn by its parent; this may have changed 8914 invalidateParentIfNeeded(); 8915 } 8916 } 8917 8918 /** 8919 * The degrees that the view is rotated around the pivot point. 8920 * 8921 * @see #setRotation(float) 8922 * @see #getPivotX() 8923 * @see #getPivotY() 8924 * 8925 * @return The degrees of rotation. 8926 */ 8927 @ViewDebug.ExportedProperty(category = "drawing") 8928 public float getRotation() { 8929 return mTransformationInfo != null ? mTransformationInfo.mRotation : 0; 8930 } 8931 8932 /** 8933 * Sets the degrees that the view is rotated around the pivot point. Increasing values 8934 * result in clockwise rotation. 8935 * 8936 * @param rotation The degrees of rotation. 8937 * 8938 * @see #getRotation() 8939 * @see #getPivotX() 8940 * @see #getPivotY() 8941 * @see #setRotationX(float) 8942 * @see #setRotationY(float) 8943 * 8944 * @attr ref android.R.styleable#View_rotation 8945 */ 8946 public void setRotation(float rotation) { 8947 ensureTransformationInfo(); 8948 final TransformationInfo info = mTransformationInfo; 8949 if (info.mRotation != rotation) { 8950 // Double-invalidation is necessary to capture view's old and new areas 8951 invalidateViewProperty(true, false); 8952 info.mRotation = rotation; 8953 info.mMatrixDirty = true; 8954 invalidateViewProperty(false, true); 8955 if (mDisplayList != null) { 8956 mDisplayList.setRotation(rotation); 8957 } 8958 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 8959 // View was rejected last time it was drawn by its parent; this may have changed 8960 invalidateParentIfNeeded(); 8961 } 8962 } 8963 } 8964 8965 /** 8966 * The degrees that the view is rotated around the vertical axis through the pivot point. 8967 * 8968 * @see #getPivotX() 8969 * @see #getPivotY() 8970 * @see #setRotationY(float) 8971 * 8972 * @return The degrees of Y rotation. 8973 */ 8974 @ViewDebug.ExportedProperty(category = "drawing") 8975 public float getRotationY() { 8976 return mTransformationInfo != null ? mTransformationInfo.mRotationY : 0; 8977 } 8978 8979 /** 8980 * Sets the degrees that the view is rotated around the vertical axis through the pivot point. 8981 * Increasing values result in counter-clockwise rotation from the viewpoint of looking 8982 * down the y axis. 8983 * 8984 * When rotating large views, it is recommended to adjust the camera distance 8985 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 8986 * 8987 * @param rotationY The degrees of Y rotation. 8988 * 8989 * @see #getRotationY() 8990 * @see #getPivotX() 8991 * @see #getPivotY() 8992 * @see #setRotation(float) 8993 * @see #setRotationX(float) 8994 * @see #setCameraDistance(float) 8995 * 8996 * @attr ref android.R.styleable#View_rotationY 8997 */ 8998 public void setRotationY(float rotationY) { 8999 ensureTransformationInfo(); 9000 final TransformationInfo info = mTransformationInfo; 9001 if (info.mRotationY != rotationY) { 9002 invalidateViewProperty(true, false); 9003 info.mRotationY = rotationY; 9004 info.mMatrixDirty = true; 9005 invalidateViewProperty(false, true); 9006 if (mDisplayList != null) { 9007 mDisplayList.setRotationY(rotationY); 9008 } 9009 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9010 // View was rejected last time it was drawn by its parent; this may have changed 9011 invalidateParentIfNeeded(); 9012 } 9013 } 9014 } 9015 9016 /** 9017 * The degrees that the view is rotated around the horizontal axis through the pivot point. 9018 * 9019 * @see #getPivotX() 9020 * @see #getPivotY() 9021 * @see #setRotationX(float) 9022 * 9023 * @return The degrees of X rotation. 9024 */ 9025 @ViewDebug.ExportedProperty(category = "drawing") 9026 public float getRotationX() { 9027 return mTransformationInfo != null ? mTransformationInfo.mRotationX : 0; 9028 } 9029 9030 /** 9031 * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. 9032 * Increasing values result in clockwise rotation from the viewpoint of looking down the 9033 * x axis. 9034 * 9035 * When rotating large views, it is recommended to adjust the camera distance 9036 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 9037 * 9038 * @param rotationX The degrees of X rotation. 9039 * 9040 * @see #getRotationX() 9041 * @see #getPivotX() 9042 * @see #getPivotY() 9043 * @see #setRotation(float) 9044 * @see #setRotationY(float) 9045 * @see #setCameraDistance(float) 9046 * 9047 * @attr ref android.R.styleable#View_rotationX 9048 */ 9049 public void setRotationX(float rotationX) { 9050 ensureTransformationInfo(); 9051 final TransformationInfo info = mTransformationInfo; 9052 if (info.mRotationX != rotationX) { 9053 invalidateViewProperty(true, false); 9054 info.mRotationX = rotationX; 9055 info.mMatrixDirty = true; 9056 invalidateViewProperty(false, true); 9057 if (mDisplayList != null) { 9058 mDisplayList.setRotationX(rotationX); 9059 } 9060 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9061 // View was rejected last time it was drawn by its parent; this may have changed 9062 invalidateParentIfNeeded(); 9063 } 9064 } 9065 } 9066 9067 /** 9068 * The amount that the view is scaled in x around the pivot point, as a proportion of 9069 * the view's unscaled width. A value of 1, the default, means that no scaling is applied. 9070 * 9071 * <p>By default, this is 1.0f. 9072 * 9073 * @see #getPivotX() 9074 * @see #getPivotY() 9075 * @return The scaling factor. 9076 */ 9077 @ViewDebug.ExportedProperty(category = "drawing") 9078 public float getScaleX() { 9079 return mTransformationInfo != null ? mTransformationInfo.mScaleX : 1; 9080 } 9081 9082 /** 9083 * Sets the amount that the view is scaled in x around the pivot point, as a proportion of 9084 * the view's unscaled width. A value of 1 means that no scaling is applied. 9085 * 9086 * @param scaleX The scaling factor. 9087 * @see #getPivotX() 9088 * @see #getPivotY() 9089 * 9090 * @attr ref android.R.styleable#View_scaleX 9091 */ 9092 public void setScaleX(float scaleX) { 9093 ensureTransformationInfo(); 9094 final TransformationInfo info = mTransformationInfo; 9095 if (info.mScaleX != scaleX) { 9096 invalidateViewProperty(true, false); 9097 info.mScaleX = scaleX; 9098 info.mMatrixDirty = true; 9099 invalidateViewProperty(false, true); 9100 if (mDisplayList != null) { 9101 mDisplayList.setScaleX(scaleX); 9102 } 9103 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9104 // View was rejected last time it was drawn by its parent; this may have changed 9105 invalidateParentIfNeeded(); 9106 } 9107 } 9108 } 9109 9110 /** 9111 * The amount that the view is scaled in y around the pivot point, as a proportion of 9112 * the view's unscaled height. A value of 1, the default, means that no scaling is applied. 9113 * 9114 * <p>By default, this is 1.0f. 9115 * 9116 * @see #getPivotX() 9117 * @see #getPivotY() 9118 * @return The scaling factor. 9119 */ 9120 @ViewDebug.ExportedProperty(category = "drawing") 9121 public float getScaleY() { 9122 return mTransformationInfo != null ? mTransformationInfo.mScaleY : 1; 9123 } 9124 9125 /** 9126 * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of 9127 * the view's unscaled width. A value of 1 means that no scaling is applied. 9128 * 9129 * @param scaleY The scaling factor. 9130 * @see #getPivotX() 9131 * @see #getPivotY() 9132 * 9133 * @attr ref android.R.styleable#View_scaleY 9134 */ 9135 public void setScaleY(float scaleY) { 9136 ensureTransformationInfo(); 9137 final TransformationInfo info = mTransformationInfo; 9138 if (info.mScaleY != scaleY) { 9139 invalidateViewProperty(true, false); 9140 info.mScaleY = scaleY; 9141 info.mMatrixDirty = true; 9142 invalidateViewProperty(false, true); 9143 if (mDisplayList != null) { 9144 mDisplayList.setScaleY(scaleY); 9145 } 9146 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9147 // View was rejected last time it was drawn by its parent; this may have changed 9148 invalidateParentIfNeeded(); 9149 } 9150 } 9151 } 9152 9153 /** 9154 * The x location of the point around which the view is {@link #setRotation(float) rotated} 9155 * and {@link #setScaleX(float) scaled}. 9156 * 9157 * @see #getRotation() 9158 * @see #getScaleX() 9159 * @see #getScaleY() 9160 * @see #getPivotY() 9161 * @return The x location of the pivot point. 9162 * 9163 * @attr ref android.R.styleable#View_transformPivotX 9164 */ 9165 @ViewDebug.ExportedProperty(category = "drawing") 9166 public float getPivotX() { 9167 return mTransformationInfo != null ? mTransformationInfo.mPivotX : 0; 9168 } 9169 9170 /** 9171 * Sets the x location of the point around which the view is 9172 * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. 9173 * By default, the pivot point is centered on the object. 9174 * Setting this property disables this behavior and causes the view to use only the 9175 * explicitly set pivotX and pivotY values. 9176 * 9177 * @param pivotX The x location of the pivot point. 9178 * @see #getRotation() 9179 * @see #getScaleX() 9180 * @see #getScaleY() 9181 * @see #getPivotY() 9182 * 9183 * @attr ref android.R.styleable#View_transformPivotX 9184 */ 9185 public void setPivotX(float pivotX) { 9186 ensureTransformationInfo(); 9187 mPrivateFlags |= PFLAG_PIVOT_EXPLICITLY_SET; 9188 final TransformationInfo info = mTransformationInfo; 9189 if (info.mPivotX != pivotX) { 9190 invalidateViewProperty(true, false); 9191 info.mPivotX = pivotX; 9192 info.mMatrixDirty = true; 9193 invalidateViewProperty(false, true); 9194 if (mDisplayList != null) { 9195 mDisplayList.setPivotX(pivotX); 9196 } 9197 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9198 // View was rejected last time it was drawn by its parent; this may have changed 9199 invalidateParentIfNeeded(); 9200 } 9201 } 9202 } 9203 9204 /** 9205 * The y location of the point around which the view is {@link #setRotation(float) rotated} 9206 * and {@link #setScaleY(float) scaled}. 9207 * 9208 * @see #getRotation() 9209 * @see #getScaleX() 9210 * @see #getScaleY() 9211 * @see #getPivotY() 9212 * @return The y location of the pivot point. 9213 * 9214 * @attr ref android.R.styleable#View_transformPivotY 9215 */ 9216 @ViewDebug.ExportedProperty(category = "drawing") 9217 public float getPivotY() { 9218 return mTransformationInfo != null ? mTransformationInfo.mPivotY : 0; 9219 } 9220 9221 /** 9222 * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} 9223 * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. 9224 * Setting this property disables this behavior and causes the view to use only the 9225 * explicitly set pivotX and pivotY values. 9226 * 9227 * @param pivotY The y location of the pivot point. 9228 * @see #getRotation() 9229 * @see #getScaleX() 9230 * @see #getScaleY() 9231 * @see #getPivotY() 9232 * 9233 * @attr ref android.R.styleable#View_transformPivotY 9234 */ 9235 public void setPivotY(float pivotY) { 9236 ensureTransformationInfo(); 9237 mPrivateFlags |= PFLAG_PIVOT_EXPLICITLY_SET; 9238 final TransformationInfo info = mTransformationInfo; 9239 if (info.mPivotY != pivotY) { 9240 invalidateViewProperty(true, false); 9241 info.mPivotY = pivotY; 9242 info.mMatrixDirty = true; 9243 invalidateViewProperty(false, true); 9244 if (mDisplayList != null) { 9245 mDisplayList.setPivotY(pivotY); 9246 } 9247 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9248 // View was rejected last time it was drawn by its parent; this may have changed 9249 invalidateParentIfNeeded(); 9250 } 9251 } 9252 } 9253 9254 /** 9255 * The opacity of the view. This is a value from 0 to 1, where 0 means the view is 9256 * completely transparent and 1 means the view is completely opaque. 9257 * 9258 * <p>By default this is 1.0f. 9259 * @return The opacity of the view. 9260 */ 9261 @ViewDebug.ExportedProperty(category = "drawing") 9262 public float getAlpha() { 9263 return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; 9264 } 9265 9266 /** 9267 * Returns whether this View has content which overlaps. This function, intended to be 9268 * overridden by specific View types, is an optimization when alpha is set on a view. If 9269 * rendering overlaps in a view with alpha < 1, that view is drawn to an offscreen buffer 9270 * and then composited it into place, which can be expensive. If the view has no overlapping 9271 * rendering, the view can draw each primitive with the appropriate alpha value directly. 9272 * An example of overlapping rendering is a TextView with a background image, such as a 9273 * Button. An example of non-overlapping rendering is a TextView with no background, or 9274 * an ImageView with only the foreground image. The default implementation returns true; 9275 * subclasses should override if they have cases which can be optimized. 9276 * 9277 * @return true if the content in this view might overlap, false otherwise. 9278 */ 9279 public boolean hasOverlappingRendering() { 9280 return true; 9281 } 9282 9283 /** 9284 * <p>Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is 9285 * completely transparent and 1 means the view is completely opaque.</p> 9286 * 9287 * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is 9288 * responsible for applying the opacity itself. Otherwise, calling this method is 9289 * equivalent to calling {@link #setLayerType(int, android.graphics.Paint)} and 9290 * setting a hardware layer.</p> 9291 * 9292 * <p>Note that setting alpha to a translucent value (0 < alpha < 1) may have 9293 * performance implications. It is generally best to use the alpha property sparingly and 9294 * transiently, as in the case of fading animations.</p> 9295 * 9296 * @param alpha The opacity of the view. 9297 * 9298 * @see #setLayerType(int, android.graphics.Paint) 9299 * 9300 * @attr ref android.R.styleable#View_alpha 9301 */ 9302 public void setAlpha(float alpha) { 9303 ensureTransformationInfo(); 9304 if (mTransformationInfo.mAlpha != alpha) { 9305 mTransformationInfo.mAlpha = alpha; 9306 if (onSetAlpha((int) (alpha * 255))) { 9307 mPrivateFlags |= PFLAG_ALPHA_SET; 9308 // subclass is handling alpha - don't optimize rendering cache invalidation 9309 invalidateParentCaches(); 9310 invalidate(true); 9311 } else { 9312 mPrivateFlags &= ~PFLAG_ALPHA_SET; 9313 invalidateViewProperty(true, false); 9314 if (mDisplayList != null) { 9315 mDisplayList.setAlpha(alpha); 9316 } 9317 } 9318 } 9319 } 9320 9321 /** 9322 * Faster version of setAlpha() which performs the same steps except there are 9323 * no calls to invalidate(). The caller of this function should perform proper invalidation 9324 * on the parent and this object. The return value indicates whether the subclass handles 9325 * alpha (the return value for onSetAlpha()). 9326 * 9327 * @param alpha The new value for the alpha property 9328 * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and 9329 * the new value for the alpha property is different from the old value 9330 */ 9331 boolean setAlphaNoInvalidation(float alpha) { 9332 ensureTransformationInfo(); 9333 if (mTransformationInfo.mAlpha != alpha) { 9334 mTransformationInfo.mAlpha = alpha; 9335 boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); 9336 if (subclassHandlesAlpha) { 9337 mPrivateFlags |= PFLAG_ALPHA_SET; 9338 return true; 9339 } else { 9340 mPrivateFlags &= ~PFLAG_ALPHA_SET; 9341 if (mDisplayList != null) { 9342 mDisplayList.setAlpha(alpha); 9343 } 9344 } 9345 } 9346 return false; 9347 } 9348 9349 /** 9350 * Top position of this view relative to its parent. 9351 * 9352 * @return The top of this view, in pixels. 9353 */ 9354 @ViewDebug.CapturedViewProperty 9355 public final int getTop() { 9356 return mTop; 9357 } 9358 9359 /** 9360 * Sets the top position of this view relative to its parent. This method is meant to be called 9361 * by the layout system and should not generally be called otherwise, because the property 9362 * may be changed at any time by the layout. 9363 * 9364 * @param top The top of this view, in pixels. 9365 */ 9366 public final void setTop(int top) { 9367 if (top != mTop) { 9368 updateMatrix(); 9369 final boolean matrixIsIdentity = mTransformationInfo == null 9370 || mTransformationInfo.mMatrixIsIdentity; 9371 if (matrixIsIdentity) { 9372 if (mAttachInfo != null) { 9373 int minTop; 9374 int yLoc; 9375 if (top < mTop) { 9376 minTop = top; 9377 yLoc = top - mTop; 9378 } else { 9379 minTop = mTop; 9380 yLoc = 0; 9381 } 9382 invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); 9383 } 9384 } else { 9385 // Double-invalidation is necessary to capture view's old and new areas 9386 invalidate(true); 9387 } 9388 9389 int width = mRight - mLeft; 9390 int oldHeight = mBottom - mTop; 9391 9392 mTop = top; 9393 if (mDisplayList != null) { 9394 mDisplayList.setTop(mTop); 9395 } 9396 9397 onSizeChanged(width, mBottom - mTop, width, oldHeight); 9398 9399 if (!matrixIsIdentity) { 9400 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 9401 // A change in dimension means an auto-centered pivot point changes, too 9402 mTransformationInfo.mMatrixDirty = true; 9403 } 9404 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 9405 invalidate(true); 9406 } 9407 mBackgroundSizeChanged = true; 9408 invalidateParentIfNeeded(); 9409 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9410 // View was rejected last time it was drawn by its parent; this may have changed 9411 invalidateParentIfNeeded(); 9412 } 9413 } 9414 } 9415 9416 /** 9417 * Bottom position of this view relative to its parent. 9418 * 9419 * @return The bottom of this view, in pixels. 9420 */ 9421 @ViewDebug.CapturedViewProperty 9422 public final int getBottom() { 9423 return mBottom; 9424 } 9425 9426 /** 9427 * True if this view has changed since the last time being drawn. 9428 * 9429 * @return The dirty state of this view. 9430 */ 9431 public boolean isDirty() { 9432 return (mPrivateFlags & PFLAG_DIRTY_MASK) != 0; 9433 } 9434 9435 /** 9436 * Sets the bottom position of this view relative to its parent. This method is meant to be 9437 * called by the layout system and should not generally be called otherwise, because the 9438 * property may be changed at any time by the layout. 9439 * 9440 * @param bottom The bottom of this view, in pixels. 9441 */ 9442 public final void setBottom(int bottom) { 9443 if (bottom != mBottom) { 9444 updateMatrix(); 9445 final boolean matrixIsIdentity = mTransformationInfo == null 9446 || mTransformationInfo.mMatrixIsIdentity; 9447 if (matrixIsIdentity) { 9448 if (mAttachInfo != null) { 9449 int maxBottom; 9450 if (bottom < mBottom) { 9451 maxBottom = mBottom; 9452 } else { 9453 maxBottom = bottom; 9454 } 9455 invalidate(0, 0, mRight - mLeft, maxBottom - mTop); 9456 } 9457 } else { 9458 // Double-invalidation is necessary to capture view's old and new areas 9459 invalidate(true); 9460 } 9461 9462 int width = mRight - mLeft; 9463 int oldHeight = mBottom - mTop; 9464 9465 mBottom = bottom; 9466 if (mDisplayList != null) { 9467 mDisplayList.setBottom(mBottom); 9468 } 9469 9470 onSizeChanged(width, mBottom - mTop, width, oldHeight); 9471 9472 if (!matrixIsIdentity) { 9473 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 9474 // A change in dimension means an auto-centered pivot point changes, too 9475 mTransformationInfo.mMatrixDirty = true; 9476 } 9477 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 9478 invalidate(true); 9479 } 9480 mBackgroundSizeChanged = true; 9481 invalidateParentIfNeeded(); 9482 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9483 // View was rejected last time it was drawn by its parent; this may have changed 9484 invalidateParentIfNeeded(); 9485 } 9486 } 9487 } 9488 9489 /** 9490 * Left position of this view relative to its parent. 9491 * 9492 * @return The left edge of this view, in pixels. 9493 */ 9494 @ViewDebug.CapturedViewProperty 9495 public final int getLeft() { 9496 return mLeft; 9497 } 9498 9499 /** 9500 * Sets the left position of this view relative to its parent. This method is meant to be called 9501 * by the layout system and should not generally be called otherwise, because the property 9502 * may be changed at any time by the layout. 9503 * 9504 * @param left The bottom of this view, in pixels. 9505 */ 9506 public final void setLeft(int left) { 9507 if (left != mLeft) { 9508 updateMatrix(); 9509 final boolean matrixIsIdentity = mTransformationInfo == null 9510 || mTransformationInfo.mMatrixIsIdentity; 9511 if (matrixIsIdentity) { 9512 if (mAttachInfo != null) { 9513 int minLeft; 9514 int xLoc; 9515 if (left < mLeft) { 9516 minLeft = left; 9517 xLoc = left - mLeft; 9518 } else { 9519 minLeft = mLeft; 9520 xLoc = 0; 9521 } 9522 invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); 9523 } 9524 } else { 9525 // Double-invalidation is necessary to capture view's old and new areas 9526 invalidate(true); 9527 } 9528 9529 int oldWidth = mRight - mLeft; 9530 int height = mBottom - mTop; 9531 9532 mLeft = left; 9533 if (mDisplayList != null) { 9534 mDisplayList.setLeft(left); 9535 } 9536 9537 onSizeChanged(mRight - mLeft, height, oldWidth, height); 9538 9539 if (!matrixIsIdentity) { 9540 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 9541 // A change in dimension means an auto-centered pivot point changes, too 9542 mTransformationInfo.mMatrixDirty = true; 9543 } 9544 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 9545 invalidate(true); 9546 } 9547 mBackgroundSizeChanged = true; 9548 invalidateParentIfNeeded(); 9549 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9550 // View was rejected last time it was drawn by its parent; this may have changed 9551 invalidateParentIfNeeded(); 9552 } 9553 } 9554 } 9555 9556 /** 9557 * Right position of this view relative to its parent. 9558 * 9559 * @return The right edge of this view, in pixels. 9560 */ 9561 @ViewDebug.CapturedViewProperty 9562 public final int getRight() { 9563 return mRight; 9564 } 9565 9566 /** 9567 * Sets the right position of this view relative to its parent. This method is meant to be called 9568 * by the layout system and should not generally be called otherwise, because the property 9569 * may be changed at any time by the layout. 9570 * 9571 * @param right The bottom of this view, in pixels. 9572 */ 9573 public final void setRight(int right) { 9574 if (right != mRight) { 9575 updateMatrix(); 9576 final boolean matrixIsIdentity = mTransformationInfo == null 9577 || mTransformationInfo.mMatrixIsIdentity; 9578 if (matrixIsIdentity) { 9579 if (mAttachInfo != null) { 9580 int maxRight; 9581 if (right < mRight) { 9582 maxRight = mRight; 9583 } else { 9584 maxRight = right; 9585 } 9586 invalidate(0, 0, maxRight - mLeft, mBottom - mTop); 9587 } 9588 } else { 9589 // Double-invalidation is necessary to capture view's old and new areas 9590 invalidate(true); 9591 } 9592 9593 int oldWidth = mRight - mLeft; 9594 int height = mBottom - mTop; 9595 9596 mRight = right; 9597 if (mDisplayList != null) { 9598 mDisplayList.setRight(mRight); 9599 } 9600 9601 onSizeChanged(mRight - mLeft, height, oldWidth, height); 9602 9603 if (!matrixIsIdentity) { 9604 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 9605 // A change in dimension means an auto-centered pivot point changes, too 9606 mTransformationInfo.mMatrixDirty = true; 9607 } 9608 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 9609 invalidate(true); 9610 } 9611 mBackgroundSizeChanged = true; 9612 invalidateParentIfNeeded(); 9613 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9614 // View was rejected last time it was drawn by its parent; this may have changed 9615 invalidateParentIfNeeded(); 9616 } 9617 } 9618 } 9619 9620 /** 9621 * The visual x position of this view, in pixels. This is equivalent to the 9622 * {@link #setTranslationX(float) translationX} property plus the current 9623 * {@link #getLeft() left} property. 9624 * 9625 * @return The visual x position of this view, in pixels. 9626 */ 9627 @ViewDebug.ExportedProperty(category = "drawing") 9628 public float getX() { 9629 return mLeft + (mTransformationInfo != null ? mTransformationInfo.mTranslationX : 0); 9630 } 9631 9632 /** 9633 * Sets the visual x position of this view, in pixels. This is equivalent to setting the 9634 * {@link #setTranslationX(float) translationX} property to be the difference between 9635 * the x value passed in and the current {@link #getLeft() left} property. 9636 * 9637 * @param x The visual x position of this view, in pixels. 9638 */ 9639 public void setX(float x) { 9640 setTranslationX(x - mLeft); 9641 } 9642 9643 /** 9644 * The visual y position of this view, in pixels. This is equivalent to the 9645 * {@link #setTranslationY(float) translationY} property plus the current 9646 * {@link #getTop() top} property. 9647 * 9648 * @return The visual y position of this view, in pixels. 9649 */ 9650 @ViewDebug.ExportedProperty(category = "drawing") 9651 public float getY() { 9652 return mTop + (mTransformationInfo != null ? mTransformationInfo.mTranslationY : 0); 9653 } 9654 9655 /** 9656 * Sets the visual y position of this view, in pixels. This is equivalent to setting the 9657 * {@link #setTranslationY(float) translationY} property to be the difference between 9658 * the y value passed in and the current {@link #getTop() top} property. 9659 * 9660 * @param y The visual y position of this view, in pixels. 9661 */ 9662 public void setY(float y) { 9663 setTranslationY(y - mTop); 9664 } 9665 9666 9667 /** 9668 * The horizontal location of this view relative to its {@link #getLeft() left} position. 9669 * This position is post-layout, in addition to wherever the object's 9670 * layout placed it. 9671 * 9672 * @return The horizontal position of this view relative to its left position, in pixels. 9673 */ 9674 @ViewDebug.ExportedProperty(category = "drawing") 9675 public float getTranslationX() { 9676 return mTransformationInfo != null ? mTransformationInfo.mTranslationX : 0; 9677 } 9678 9679 /** 9680 * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. 9681 * This effectively positions the object post-layout, in addition to wherever the object's 9682 * layout placed it. 9683 * 9684 * @param translationX The horizontal position of this view relative to its left position, 9685 * in pixels. 9686 * 9687 * @attr ref android.R.styleable#View_translationX 9688 */ 9689 public void setTranslationX(float translationX) { 9690 ensureTransformationInfo(); 9691 final TransformationInfo info = mTransformationInfo; 9692 if (info.mTranslationX != translationX) { 9693 // Double-invalidation is necessary to capture view's old and new areas 9694 invalidateViewProperty(true, false); 9695 info.mTranslationX = translationX; 9696 info.mMatrixDirty = true; 9697 invalidateViewProperty(false, true); 9698 if (mDisplayList != null) { 9699 mDisplayList.setTranslationX(translationX); 9700 } 9701 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9702 // View was rejected last time it was drawn by its parent; this may have changed 9703 invalidateParentIfNeeded(); 9704 } 9705 } 9706 } 9707 9708 /** 9709 * The horizontal location of this view relative to its {@link #getTop() top} position. 9710 * This position is post-layout, in addition to wherever the object's 9711 * layout placed it. 9712 * 9713 * @return The vertical position of this view relative to its top position, 9714 * in pixels. 9715 */ 9716 @ViewDebug.ExportedProperty(category = "drawing") 9717 public float getTranslationY() { 9718 return mTransformationInfo != null ? mTransformationInfo.mTranslationY : 0; 9719 } 9720 9721 /** 9722 * Sets the vertical location of this view relative to its {@link #getTop() top} position. 9723 * This effectively positions the object post-layout, in addition to wherever the object's 9724 * layout placed it. 9725 * 9726 * @param translationY The vertical position of this view relative to its top position, 9727 * in pixels. 9728 * 9729 * @attr ref android.R.styleable#View_translationY 9730 */ 9731 public void setTranslationY(float translationY) { 9732 ensureTransformationInfo(); 9733 final TransformationInfo info = mTransformationInfo; 9734 if (info.mTranslationY != translationY) { 9735 invalidateViewProperty(true, false); 9736 info.mTranslationY = translationY; 9737 info.mMatrixDirty = true; 9738 invalidateViewProperty(false, true); 9739 if (mDisplayList != null) { 9740 mDisplayList.setTranslationY(translationY); 9741 } 9742 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 9743 // View was rejected last time it was drawn by its parent; this may have changed 9744 invalidateParentIfNeeded(); 9745 } 9746 } 9747 } 9748 9749 /** 9750 * Hit rectangle in parent's coordinates 9751 * 9752 * @param outRect The hit rectangle of the view. 9753 */ 9754 public void getHitRect(Rect outRect) { 9755 updateMatrix(); 9756 final TransformationInfo info = mTransformationInfo; 9757 if (info == null || info.mMatrixIsIdentity || mAttachInfo == null) { 9758 outRect.set(mLeft, mTop, mRight, mBottom); 9759 } else { 9760 final RectF tmpRect = mAttachInfo.mTmpTransformRect; 9761 tmpRect.set(-info.mPivotX, -info.mPivotY, 9762 getWidth() - info.mPivotX, getHeight() - info.mPivotY); 9763 info.mMatrix.mapRect(tmpRect); 9764 outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, 9765 (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); 9766 } 9767 } 9768 9769 /** 9770 * Determines whether the given point, in local coordinates is inside the view. 9771 */ 9772 /*package*/ final boolean pointInView(float localX, float localY) { 9773 return localX >= 0 && localX < (mRight - mLeft) 9774 && localY >= 0 && localY < (mBottom - mTop); 9775 } 9776 9777 /** 9778 * Utility method to determine whether the given point, in local coordinates, 9779 * is inside the view, where the area of the view is expanded by the slop factor. 9780 * This method is called while processing touch-move events to determine if the event 9781 * is still within the view. 9782 */ 9783 private boolean pointInView(float localX, float localY, float slop) { 9784 return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && 9785 localY < ((mBottom - mTop) + slop); 9786 } 9787 9788 /** 9789 * When a view has focus and the user navigates away from it, the next view is searched for 9790 * starting from the rectangle filled in by this method. 9791 * 9792 * By default, the rectangle is the {@link #getDrawingRect(android.graphics.Rect)}) 9793 * of the view. However, if your view maintains some idea of internal selection, 9794 * such as a cursor, or a selected row or column, you should override this method and 9795 * fill in a more specific rectangle. 9796 * 9797 * @param r The rectangle to fill in, in this view's coordinates. 9798 */ 9799 public void getFocusedRect(Rect r) { 9800 getDrawingRect(r); 9801 } 9802 9803 /** 9804 * If some part of this view is not clipped by any of its parents, then 9805 * return that area in r in global (root) coordinates. To convert r to local 9806 * coordinates (without taking possible View rotations into account), offset 9807 * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). 9808 * If the view is completely clipped or translated out, return false. 9809 * 9810 * @param r If true is returned, r holds the global coordinates of the 9811 * visible portion of this view. 9812 * @param globalOffset If true is returned, globalOffset holds the dx,dy 9813 * between this view and its root. globalOffet may be null. 9814 * @return true if r is non-empty (i.e. part of the view is visible at the 9815 * root level. 9816 */ 9817 public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { 9818 int width = mRight - mLeft; 9819 int height = mBottom - mTop; 9820 if (width > 0 && height > 0) { 9821 r.set(0, 0, width, height); 9822 if (globalOffset != null) { 9823 globalOffset.set(-mScrollX, -mScrollY); 9824 } 9825 return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); 9826 } 9827 return false; 9828 } 9829 9830 public final boolean getGlobalVisibleRect(Rect r) { 9831 return getGlobalVisibleRect(r, null); 9832 } 9833 9834 public final boolean getLocalVisibleRect(Rect r) { 9835 final Point offset = mAttachInfo != null ? mAttachInfo.mPoint : new Point(); 9836 if (getGlobalVisibleRect(r, offset)) { 9837 r.offset(-offset.x, -offset.y); // make r local 9838 return true; 9839 } 9840 return false; 9841 } 9842 9843 /** 9844 * Offset this view's vertical location by the specified number of pixels. 9845 * 9846 * @param offset the number of pixels to offset the view by 9847 */ 9848 public void offsetTopAndBottom(int offset) { 9849 if (offset != 0) { 9850 updateMatrix(); 9851 final boolean matrixIsIdentity = mTransformationInfo == null 9852 || mTransformationInfo.mMatrixIsIdentity; 9853 if (matrixIsIdentity) { 9854 if (mDisplayList != null) { 9855 invalidateViewProperty(false, false); 9856 } else { 9857 final ViewParent p = mParent; 9858 if (p != null && mAttachInfo != null) { 9859 final Rect r = mAttachInfo.mTmpInvalRect; 9860 int minTop; 9861 int maxBottom; 9862 int yLoc; 9863 if (offset < 0) { 9864 minTop = mTop + offset; 9865 maxBottom = mBottom; 9866 yLoc = offset; 9867 } else { 9868 minTop = mTop; 9869 maxBottom = mBottom + offset; 9870 yLoc = 0; 9871 } 9872 r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); 9873 p.invalidateChild(this, r); 9874 } 9875 } 9876 } else { 9877 invalidateViewProperty(false, false); 9878 } 9879 9880 mTop += offset; 9881 mBottom += offset; 9882 if (mDisplayList != null) { 9883 mDisplayList.offsetTopBottom(offset); 9884 invalidateViewProperty(false, false); 9885 } else { 9886 if (!matrixIsIdentity) { 9887 invalidateViewProperty(false, true); 9888 } 9889 invalidateParentIfNeeded(); 9890 } 9891 } 9892 } 9893 9894 /** 9895 * Offset this view's horizontal location by the specified amount of pixels. 9896 * 9897 * @param offset the numer of pixels to offset the view by 9898 */ 9899 public void offsetLeftAndRight(int offset) { 9900 if (offset != 0) { 9901 updateMatrix(); 9902 final boolean matrixIsIdentity = mTransformationInfo == null 9903 || mTransformationInfo.mMatrixIsIdentity; 9904 if (matrixIsIdentity) { 9905 if (mDisplayList != null) { 9906 invalidateViewProperty(false, false); 9907 } else { 9908 final ViewParent p = mParent; 9909 if (p != null && mAttachInfo != null) { 9910 final Rect r = mAttachInfo.mTmpInvalRect; 9911 int minLeft; 9912 int maxRight; 9913 if (offset < 0) { 9914 minLeft = mLeft + offset; 9915 maxRight = mRight; 9916 } else { 9917 minLeft = mLeft; 9918 maxRight = mRight + offset; 9919 } 9920 r.set(0, 0, maxRight - minLeft, mBottom - mTop); 9921 p.invalidateChild(this, r); 9922 } 9923 } 9924 } else { 9925 invalidateViewProperty(false, false); 9926 } 9927 9928 mLeft += offset; 9929 mRight += offset; 9930 if (mDisplayList != null) { 9931 mDisplayList.offsetLeftRight(offset); 9932 invalidateViewProperty(false, false); 9933 } else { 9934 if (!matrixIsIdentity) { 9935 invalidateViewProperty(false, true); 9936 } 9937 invalidateParentIfNeeded(); 9938 } 9939 } 9940 } 9941 9942 /** 9943 * Get the LayoutParams associated with this view. All views should have 9944 * layout parameters. These supply parameters to the <i>parent</i> of this 9945 * view specifying how it should be arranged. There are many subclasses of 9946 * ViewGroup.LayoutParams, and these correspond to the different subclasses 9947 * of ViewGroup that are responsible for arranging their children. 9948 * 9949 * This method may return null if this View is not attached to a parent 9950 * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} 9951 * was not invoked successfully. When a View is attached to a parent 9952 * ViewGroup, this method must not return null. 9953 * 9954 * @return The LayoutParams associated with this view, or null if no 9955 * parameters have been set yet 9956 */ 9957 @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") 9958 public ViewGroup.LayoutParams getLayoutParams() { 9959 return mLayoutParams; 9960 } 9961 9962 /** 9963 * Set the layout parameters associated with this view. These supply 9964 * parameters to the <i>parent</i> of this view specifying how it should be 9965 * arranged. There are many subclasses of ViewGroup.LayoutParams, and these 9966 * correspond to the different subclasses of ViewGroup that are responsible 9967 * for arranging their children. 9968 * 9969 * @param params The layout parameters for this view, cannot be null 9970 */ 9971 public void setLayoutParams(ViewGroup.LayoutParams params) { 9972 if (params == null) { 9973 throw new NullPointerException("Layout parameters cannot be null"); 9974 } 9975 mLayoutParams = params; 9976 resolveLayoutParams(); 9977 if (mParent instanceof ViewGroup) { 9978 ((ViewGroup) mParent).onSetLayoutParams(this, params); 9979 } 9980 requestLayout(); 9981 } 9982 9983 /** 9984 * Resolve the layout parameters depending on the resolved layout direction 9985 */ 9986 private void resolveLayoutParams() { 9987 if (mLayoutParams != null) { 9988 mLayoutParams.onResolveLayoutDirection(getLayoutDirection()); 9989 } 9990 } 9991 9992 /** 9993 * Set the scrolled position of your view. This will cause a call to 9994 * {@link #onScrollChanged(int, int, int, int)} and the view will be 9995 * invalidated. 9996 * @param x the x position to scroll to 9997 * @param y the y position to scroll to 9998 */ 9999 public void scrollTo(int x, int y) { 10000 if (mScrollX != x || mScrollY != y) { 10001 int oldX = mScrollX; 10002 int oldY = mScrollY; 10003 mScrollX = x; 10004 mScrollY = y; 10005 invalidateParentCaches(); 10006 onScrollChanged(mScrollX, mScrollY, oldX, oldY); 10007 if (!awakenScrollBars()) { 10008 postInvalidateOnAnimation(); 10009 } 10010 } 10011 } 10012 10013 /** 10014 * Move the scrolled position of your view. This will cause a call to 10015 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10016 * invalidated. 10017 * @param x the amount of pixels to scroll by horizontally 10018 * @param y the amount of pixels to scroll by vertically 10019 */ 10020 public void scrollBy(int x, int y) { 10021 scrollTo(mScrollX + x, mScrollY + y); 10022 } 10023 10024 /** 10025 * <p>Trigger the scrollbars to draw. When invoked this method starts an 10026 * animation to fade the scrollbars out after a default delay. If a subclass 10027 * provides animated scrolling, the start delay should equal the duration 10028 * of the scrolling animation.</p> 10029 * 10030 * <p>The animation starts only if at least one of the scrollbars is 10031 * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and 10032 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 10033 * this method returns true, and false otherwise. If the animation is 10034 * started, this method calls {@link #invalidate()}; in that case the 10035 * caller should not call {@link #invalidate()}.</p> 10036 * 10037 * <p>This method should be invoked every time a subclass directly updates 10038 * the scroll parameters.</p> 10039 * 10040 * <p>This method is automatically invoked by {@link #scrollBy(int, int)} 10041 * and {@link #scrollTo(int, int)}.</p> 10042 * 10043 * @return true if the animation is played, false otherwise 10044 * 10045 * @see #awakenScrollBars(int) 10046 * @see #scrollBy(int, int) 10047 * @see #scrollTo(int, int) 10048 * @see #isHorizontalScrollBarEnabled() 10049 * @see #isVerticalScrollBarEnabled() 10050 * @see #setHorizontalScrollBarEnabled(boolean) 10051 * @see #setVerticalScrollBarEnabled(boolean) 10052 */ 10053 protected boolean awakenScrollBars() { 10054 return mScrollCache != null && 10055 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); 10056 } 10057 10058 /** 10059 * Trigger the scrollbars to draw. 10060 * This method differs from awakenScrollBars() only in its default duration. 10061 * initialAwakenScrollBars() will show the scroll bars for longer than 10062 * usual to give the user more of a chance to notice them. 10063 * 10064 * @return true if the animation is played, false otherwise. 10065 */ 10066 private boolean initialAwakenScrollBars() { 10067 return mScrollCache != null && 10068 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); 10069 } 10070 10071 /** 10072 * <p> 10073 * Trigger the scrollbars to draw. When invoked this method starts an 10074 * animation to fade the scrollbars out after a fixed delay. If a subclass 10075 * provides animated scrolling, the start delay should equal the duration of 10076 * the scrolling animation. 10077 * </p> 10078 * 10079 * <p> 10080 * The animation starts only if at least one of the scrollbars is enabled, 10081 * as specified by {@link #isHorizontalScrollBarEnabled()} and 10082 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 10083 * this method returns true, and false otherwise. If the animation is 10084 * started, this method calls {@link #invalidate()}; in that case the caller 10085 * should not call {@link #invalidate()}. 10086 * </p> 10087 * 10088 * <p> 10089 * This method should be invoked everytime a subclass directly updates the 10090 * scroll parameters. 10091 * </p> 10092 * 10093 * @param startDelay the delay, in milliseconds, after which the animation 10094 * should start; when the delay is 0, the animation starts 10095 * immediately 10096 * @return true if the animation is played, false otherwise 10097 * 10098 * @see #scrollBy(int, int) 10099 * @see #scrollTo(int, int) 10100 * @see #isHorizontalScrollBarEnabled() 10101 * @see #isVerticalScrollBarEnabled() 10102 * @see #setHorizontalScrollBarEnabled(boolean) 10103 * @see #setVerticalScrollBarEnabled(boolean) 10104 */ 10105 protected boolean awakenScrollBars(int startDelay) { 10106 return awakenScrollBars(startDelay, true); 10107 } 10108 10109 /** 10110 * <p> 10111 * Trigger the scrollbars to draw. When invoked this method starts an 10112 * animation to fade the scrollbars out after a fixed delay. If a subclass 10113 * provides animated scrolling, the start delay should equal the duration of 10114 * the scrolling animation. 10115 * </p> 10116 * 10117 * <p> 10118 * The animation starts only if at least one of the scrollbars is enabled, 10119 * as specified by {@link #isHorizontalScrollBarEnabled()} and 10120 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 10121 * this method returns true, and false otherwise. If the animation is 10122 * started, this method calls {@link #invalidate()} if the invalidate parameter 10123 * is set to true; in that case the caller 10124 * should not call {@link #invalidate()}. 10125 * </p> 10126 * 10127 * <p> 10128 * This method should be invoked everytime a subclass directly updates the 10129 * scroll parameters. 10130 * </p> 10131 * 10132 * @param startDelay the delay, in milliseconds, after which the animation 10133 * should start; when the delay is 0, the animation starts 10134 * immediately 10135 * 10136 * @param invalidate Wheter this method should call invalidate 10137 * 10138 * @return true if the animation is played, false otherwise 10139 * 10140 * @see #scrollBy(int, int) 10141 * @see #scrollTo(int, int) 10142 * @see #isHorizontalScrollBarEnabled() 10143 * @see #isVerticalScrollBarEnabled() 10144 * @see #setHorizontalScrollBarEnabled(boolean) 10145 * @see #setVerticalScrollBarEnabled(boolean) 10146 */ 10147 protected boolean awakenScrollBars(int startDelay, boolean invalidate) { 10148 final ScrollabilityCache scrollCache = mScrollCache; 10149 10150 if (scrollCache == null || !scrollCache.fadeScrollBars) { 10151 return false; 10152 } 10153 10154 if (scrollCache.scrollBar == null) { 10155 scrollCache.scrollBar = new ScrollBarDrawable(); 10156 } 10157 10158 if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { 10159 10160 if (invalidate) { 10161 // Invalidate to show the scrollbars 10162 postInvalidateOnAnimation(); 10163 } 10164 10165 if (scrollCache.state == ScrollabilityCache.OFF) { 10166 // FIXME: this is copied from WindowManagerService. 10167 // We should get this value from the system when it 10168 // is possible to do so. 10169 final int KEY_REPEAT_FIRST_DELAY = 750; 10170 startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); 10171 } 10172 10173 // Tell mScrollCache when we should start fading. This may 10174 // extend the fade start time if one was already scheduled 10175 long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; 10176 scrollCache.fadeStartTime = fadeStartTime; 10177 scrollCache.state = ScrollabilityCache.ON; 10178 10179 // Schedule our fader to run, unscheduling any old ones first 10180 if (mAttachInfo != null) { 10181 mAttachInfo.mHandler.removeCallbacks(scrollCache); 10182 mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); 10183 } 10184 10185 return true; 10186 } 10187 10188 return false; 10189 } 10190 10191 /** 10192 * Do not invalidate views which are not visible and which are not running an animation. They 10193 * will not get drawn and they should not set dirty flags as if they will be drawn 10194 */ 10195 private boolean skipInvalidate() { 10196 return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && 10197 (!(mParent instanceof ViewGroup) || 10198 !((ViewGroup) mParent).isViewTransitioning(this)); 10199 } 10200 /** 10201 * Mark the area defined by dirty as needing to be drawn. If the view is 10202 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some point 10203 * in the future. This must be called from a UI thread. To call from a non-UI 10204 * thread, call {@link #postInvalidate()}. 10205 * 10206 * WARNING: This method is destructive to dirty. 10207 * @param dirty the rectangle representing the bounds of the dirty region 10208 */ 10209 public void invalidate(Rect dirty) { 10210 if (skipInvalidate()) { 10211 return; 10212 } 10213 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) || 10214 (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID || 10215 (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED) { 10216 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10217 mPrivateFlags |= PFLAG_INVALIDATED; 10218 mPrivateFlags |= PFLAG_DIRTY; 10219 final ViewParent p = mParent; 10220 final AttachInfo ai = mAttachInfo; 10221 //noinspection PointlessBooleanExpression,ConstantConditions 10222 if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { 10223 if (p != null && ai != null && ai.mHardwareAccelerated) { 10224 // fast-track for GL-enabled applications; just invalidate the whole hierarchy 10225 // with a null dirty rect, which tells the ViewAncestor to redraw everything 10226 p.invalidateChild(this, null); 10227 return; 10228 } 10229 } 10230 if (p != null && ai != null) { 10231 final int scrollX = mScrollX; 10232 final int scrollY = mScrollY; 10233 final Rect r = ai.mTmpInvalRect; 10234 r.set(dirty.left - scrollX, dirty.top - scrollY, 10235 dirty.right - scrollX, dirty.bottom - scrollY); 10236 mParent.invalidateChild(this, r); 10237 } 10238 } 10239 } 10240 10241 /** 10242 * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. 10243 * The coordinates of the dirty rect are relative to the view. 10244 * If the view is visible, {@link #onDraw(android.graphics.Canvas)} 10245 * will be called at some point in the future. This must be called from 10246 * a UI thread. To call from a non-UI thread, call {@link #postInvalidate()}. 10247 * @param l the left position of the dirty region 10248 * @param t the top position of the dirty region 10249 * @param r the right position of the dirty region 10250 * @param b the bottom position of the dirty region 10251 */ 10252 public void invalidate(int l, int t, int r, int b) { 10253 if (skipInvalidate()) { 10254 return; 10255 } 10256 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) || 10257 (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID || 10258 (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED) { 10259 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10260 mPrivateFlags |= PFLAG_INVALIDATED; 10261 mPrivateFlags |= PFLAG_DIRTY; 10262 final ViewParent p = mParent; 10263 final AttachInfo ai = mAttachInfo; 10264 //noinspection PointlessBooleanExpression,ConstantConditions 10265 if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { 10266 if (p != null && ai != null && ai.mHardwareAccelerated) { 10267 // fast-track for GL-enabled applications; just invalidate the whole hierarchy 10268 // with a null dirty rect, which tells the ViewAncestor to redraw everything 10269 p.invalidateChild(this, null); 10270 return; 10271 } 10272 } 10273 if (p != null && ai != null && l < r && t < b) { 10274 final int scrollX = mScrollX; 10275 final int scrollY = mScrollY; 10276 final Rect tmpr = ai.mTmpInvalRect; 10277 tmpr.set(l - scrollX, t - scrollY, r - scrollX, b - scrollY); 10278 p.invalidateChild(this, tmpr); 10279 } 10280 } 10281 } 10282 10283 /** 10284 * Invalidate the whole view. If the view is visible, 10285 * {@link #onDraw(android.graphics.Canvas)} will be called at some point in 10286 * the future. This must be called from a UI thread. To call from a non-UI thread, 10287 * call {@link #postInvalidate()}. 10288 */ 10289 public void invalidate() { 10290 invalidate(true); 10291 } 10292 10293 /** 10294 * This is where the invalidate() work actually happens. A full invalidate() 10295 * causes the drawing cache to be invalidated, but this function can be called with 10296 * invalidateCache set to false to skip that invalidation step for cases that do not 10297 * need it (for example, a component that remains at the same dimensions with the same 10298 * content). 10299 * 10300 * @param invalidateCache Whether the drawing cache for this view should be invalidated as 10301 * well. This is usually true for a full invalidate, but may be set to false if the 10302 * View's contents or dimensions have not changed. 10303 */ 10304 void invalidate(boolean invalidateCache) { 10305 if (skipInvalidate()) { 10306 return; 10307 } 10308 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) || 10309 (invalidateCache && (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID) || 10310 (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED || isOpaque() != mLastIsOpaque) { 10311 mLastIsOpaque = isOpaque(); 10312 mPrivateFlags &= ~PFLAG_DRAWN; 10313 mPrivateFlags |= PFLAG_DIRTY; 10314 if (invalidateCache) { 10315 mPrivateFlags |= PFLAG_INVALIDATED; 10316 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10317 } 10318 final AttachInfo ai = mAttachInfo; 10319 final ViewParent p = mParent; 10320 //noinspection PointlessBooleanExpression,ConstantConditions 10321 if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { 10322 if (p != null && ai != null && ai.mHardwareAccelerated) { 10323 // fast-track for GL-enabled applications; just invalidate the whole hierarchy 10324 // with a null dirty rect, which tells the ViewAncestor to redraw everything 10325 p.invalidateChild(this, null); 10326 return; 10327 } 10328 } 10329 10330 if (p != null && ai != null) { 10331 final Rect r = ai.mTmpInvalRect; 10332 r.set(0, 0, mRight - mLeft, mBottom - mTop); 10333 // Don't call invalidate -- we don't want to internally scroll 10334 // our own bounds 10335 p.invalidateChild(this, r); 10336 } 10337 } 10338 } 10339 10340 /** 10341 * Quick invalidation for View property changes (alpha, translationXY, etc.). We don't want to 10342 * set any flags or handle all of the cases handled by the default invalidation methods. 10343 * Instead, we just want to schedule a traversal in ViewRootImpl with the appropriate 10344 * dirty rect. This method calls into fast invalidation methods in ViewGroup that 10345 * walk up the hierarchy, transforming the dirty rect as necessary. 10346 * 10347 * The method also handles normal invalidation logic if display list properties are not 10348 * being used in this view. The invalidateParent and forceRedraw flags are used by that 10349 * backup approach, to handle these cases used in the various property-setting methods. 10350 * 10351 * @param invalidateParent Force a call to invalidateParentCaches() if display list properties 10352 * are not being used in this view 10353 * @param forceRedraw Mark the view as DRAWN to force the invalidation to propagate, if display 10354 * list properties are not being used in this view 10355 */ 10356 void invalidateViewProperty(boolean invalidateParent, boolean forceRedraw) { 10357 if (mDisplayList == null || (mPrivateFlags & PFLAG_DRAW_ANIMATION) == PFLAG_DRAW_ANIMATION) { 10358 if (invalidateParent) { 10359 invalidateParentCaches(); 10360 } 10361 if (forceRedraw) { 10362 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 10363 } 10364 invalidate(false); 10365 } else { 10366 final AttachInfo ai = mAttachInfo; 10367 final ViewParent p = mParent; 10368 if (p != null && ai != null) { 10369 final Rect r = ai.mTmpInvalRect; 10370 r.set(0, 0, mRight - mLeft, mBottom - mTop); 10371 if (mParent instanceof ViewGroup) { 10372 ((ViewGroup) mParent).invalidateChildFast(this, r); 10373 } else { 10374 mParent.invalidateChild(this, r); 10375 } 10376 } 10377 } 10378 } 10379 10380 /** 10381 * Utility method to transform a given Rect by the current matrix of this view. 10382 */ 10383 void transformRect(final Rect rect) { 10384 if (!getMatrix().isIdentity()) { 10385 RectF boundingRect = mAttachInfo.mTmpTransformRect; 10386 boundingRect.set(rect); 10387 getMatrix().mapRect(boundingRect); 10388 rect.set((int) (boundingRect.left - 0.5f), 10389 (int) (boundingRect.top - 0.5f), 10390 (int) (boundingRect.right + 0.5f), 10391 (int) (boundingRect.bottom + 0.5f)); 10392 } 10393 } 10394 10395 /** 10396 * Used to indicate that the parent of this view should clear its caches. This functionality 10397 * is used to force the parent to rebuild its display list (when hardware-accelerated), 10398 * which is necessary when various parent-managed properties of the view change, such as 10399 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only 10400 * clears the parent caches and does not causes an invalidate event. 10401 * 10402 * @hide 10403 */ 10404 protected void invalidateParentCaches() { 10405 if (mParent instanceof View) { 10406 ((View) mParent).mPrivateFlags |= PFLAG_INVALIDATED; 10407 } 10408 } 10409 10410 /** 10411 * Used to indicate that the parent of this view should be invalidated. This functionality 10412 * is used to force the parent to rebuild its display list (when hardware-accelerated), 10413 * which is necessary when various parent-managed properties of the view change, such as 10414 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate 10415 * an invalidation event to the parent. 10416 * 10417 * @hide 10418 */ 10419 protected void invalidateParentIfNeeded() { 10420 if (isHardwareAccelerated() && mParent instanceof View) { 10421 ((View) mParent).invalidate(true); 10422 } 10423 } 10424 10425 /** 10426 * Indicates whether this View is opaque. An opaque View guarantees that it will 10427 * draw all the pixels overlapping its bounds using a fully opaque color. 10428 * 10429 * Subclasses of View should override this method whenever possible to indicate 10430 * whether an instance is opaque. Opaque Views are treated in a special way by 10431 * the View hierarchy, possibly allowing it to perform optimizations during 10432 * invalidate/draw passes. 10433 * 10434 * @return True if this View is guaranteed to be fully opaque, false otherwise. 10435 */ 10436 @ViewDebug.ExportedProperty(category = "drawing") 10437 public boolean isOpaque() { 10438 return (mPrivateFlags & PFLAG_OPAQUE_MASK) == PFLAG_OPAQUE_MASK && 10439 ((mTransformationInfo != null ? mTransformationInfo.mAlpha : 1.0f) >= 1.0f); 10440 } 10441 10442 /** 10443 * @hide 10444 */ 10445 protected void computeOpaqueFlags() { 10446 // Opaque if: 10447 // - Has a background 10448 // - Background is opaque 10449 // - Doesn't have scrollbars or scrollbars are inside overlay 10450 10451 if (mBackground != null && mBackground.getOpacity() == PixelFormat.OPAQUE) { 10452 mPrivateFlags |= PFLAG_OPAQUE_BACKGROUND; 10453 } else { 10454 mPrivateFlags &= ~PFLAG_OPAQUE_BACKGROUND; 10455 } 10456 10457 final int flags = mViewFlags; 10458 if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || 10459 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY) { 10460 mPrivateFlags |= PFLAG_OPAQUE_SCROLLBARS; 10461 } else { 10462 mPrivateFlags &= ~PFLAG_OPAQUE_SCROLLBARS; 10463 } 10464 } 10465 10466 /** 10467 * @hide 10468 */ 10469 protected boolean hasOpaqueScrollbars() { 10470 return (mPrivateFlags & PFLAG_OPAQUE_SCROLLBARS) == PFLAG_OPAQUE_SCROLLBARS; 10471 } 10472 10473 /** 10474 * @return A handler associated with the thread running the View. This 10475 * handler can be used to pump events in the UI events queue. 10476 */ 10477 public Handler getHandler() { 10478 if (mAttachInfo != null) { 10479 return mAttachInfo.mHandler; 10480 } 10481 return null; 10482 } 10483 10484 /** 10485 * Gets the view root associated with the View. 10486 * @return The view root, or null if none. 10487 * @hide 10488 */ 10489 public ViewRootImpl getViewRootImpl() { 10490 if (mAttachInfo != null) { 10491 return mAttachInfo.mViewRootImpl; 10492 } 10493 return null; 10494 } 10495 10496 /** 10497 * <p>Causes the Runnable to be added to the message queue. 10498 * The runnable will be run on the user interface thread.</p> 10499 * 10500 * <p>This method can be invoked from outside of the UI thread 10501 * only when this View is attached to a window.</p> 10502 * 10503 * @param action The Runnable that will be executed. 10504 * 10505 * @return Returns true if the Runnable was successfully placed in to the 10506 * message queue. Returns false on failure, usually because the 10507 * looper processing the message queue is exiting. 10508 * 10509 * @see #postDelayed 10510 * @see #removeCallbacks 10511 */ 10512 public boolean post(Runnable action) { 10513 final AttachInfo attachInfo = mAttachInfo; 10514 if (attachInfo != null) { 10515 return attachInfo.mHandler.post(action); 10516 } 10517 // Assume that post will succeed later 10518 ViewRootImpl.getRunQueue().post(action); 10519 return true; 10520 } 10521 10522 /** 10523 * <p>Causes the Runnable to be added to the message queue, to be run 10524 * after the specified amount of time elapses. 10525 * The runnable will be run on the user interface thread.</p> 10526 * 10527 * <p>This method can be invoked from outside of the UI thread 10528 * only when this View is attached to a window.</p> 10529 * 10530 * @param action The Runnable that will be executed. 10531 * @param delayMillis The delay (in milliseconds) until the Runnable 10532 * will be executed. 10533 * 10534 * @return true if the Runnable was successfully placed in to the 10535 * message queue. Returns false on failure, usually because the 10536 * looper processing the message queue is exiting. Note that a 10537 * result of true does not mean the Runnable will be processed -- 10538 * if the looper is quit before the delivery time of the message 10539 * occurs then the message will be dropped. 10540 * 10541 * @see #post 10542 * @see #removeCallbacks 10543 */ 10544 public boolean postDelayed(Runnable action, long delayMillis) { 10545 final AttachInfo attachInfo = mAttachInfo; 10546 if (attachInfo != null) { 10547 return attachInfo.mHandler.postDelayed(action, delayMillis); 10548 } 10549 // Assume that post will succeed later 10550 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 10551 return true; 10552 } 10553 10554 /** 10555 * <p>Causes the Runnable to execute on the next animation time step. 10556 * The runnable will be run on the user interface thread.</p> 10557 * 10558 * <p>This method can be invoked from outside of the UI thread 10559 * only when this View is attached to a window.</p> 10560 * 10561 * @param action The Runnable that will be executed. 10562 * 10563 * @see #postOnAnimationDelayed 10564 * @see #removeCallbacks 10565 */ 10566 public void postOnAnimation(Runnable action) { 10567 final AttachInfo attachInfo = mAttachInfo; 10568 if (attachInfo != null) { 10569 attachInfo.mViewRootImpl.mChoreographer.postCallback( 10570 Choreographer.CALLBACK_ANIMATION, action, null); 10571 } else { 10572 // Assume that post will succeed later 10573 ViewRootImpl.getRunQueue().post(action); 10574 } 10575 } 10576 10577 /** 10578 * <p>Causes the Runnable to execute on the next animation time step, 10579 * after the specified amount of time elapses. 10580 * The runnable will be run on the user interface thread.</p> 10581 * 10582 * <p>This method can be invoked from outside of the UI thread 10583 * only when this View is attached to a window.</p> 10584 * 10585 * @param action The Runnable that will be executed. 10586 * @param delayMillis The delay (in milliseconds) until the Runnable 10587 * will be executed. 10588 * 10589 * @see #postOnAnimation 10590 * @see #removeCallbacks 10591 */ 10592 public void postOnAnimationDelayed(Runnable action, long delayMillis) { 10593 final AttachInfo attachInfo = mAttachInfo; 10594 if (attachInfo != null) { 10595 attachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 10596 Choreographer.CALLBACK_ANIMATION, action, null, delayMillis); 10597 } else { 10598 // Assume that post will succeed later 10599 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 10600 } 10601 } 10602 10603 /** 10604 * <p>Removes the specified Runnable from the message queue.</p> 10605 * 10606 * <p>This method can be invoked from outside of the UI thread 10607 * only when this View is attached to a window.</p> 10608 * 10609 * @param action The Runnable to remove from the message handling queue 10610 * 10611 * @return true if this view could ask the Handler to remove the Runnable, 10612 * false otherwise. When the returned value is true, the Runnable 10613 * may or may not have been actually removed from the message queue 10614 * (for instance, if the Runnable was not in the queue already.) 10615 * 10616 * @see #post 10617 * @see #postDelayed 10618 * @see #postOnAnimation 10619 * @see #postOnAnimationDelayed 10620 */ 10621 public boolean removeCallbacks(Runnable action) { 10622 if (action != null) { 10623 final AttachInfo attachInfo = mAttachInfo; 10624 if (attachInfo != null) { 10625 attachInfo.mHandler.removeCallbacks(action); 10626 attachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 10627 Choreographer.CALLBACK_ANIMATION, action, null); 10628 } else { 10629 // Assume that post will succeed later 10630 ViewRootImpl.getRunQueue().removeCallbacks(action); 10631 } 10632 } 10633 return true; 10634 } 10635 10636 /** 10637 * <p>Cause an invalidate to happen on a subsequent cycle through the event loop. 10638 * Use this to invalidate the View from a non-UI thread.</p> 10639 * 10640 * <p>This method can be invoked from outside of the UI thread 10641 * only when this View is attached to a window.</p> 10642 * 10643 * @see #invalidate() 10644 * @see #postInvalidateDelayed(long) 10645 */ 10646 public void postInvalidate() { 10647 postInvalidateDelayed(0); 10648 } 10649 10650 /** 10651 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 10652 * through the event loop. Use this to invalidate the View from a non-UI thread.</p> 10653 * 10654 * <p>This method can be invoked from outside of the UI thread 10655 * only when this View is attached to a window.</p> 10656 * 10657 * @param left The left coordinate of the rectangle to invalidate. 10658 * @param top The top coordinate of the rectangle to invalidate. 10659 * @param right The right coordinate of the rectangle to invalidate. 10660 * @param bottom The bottom coordinate of the rectangle to invalidate. 10661 * 10662 * @see #invalidate(int, int, int, int) 10663 * @see #invalidate(Rect) 10664 * @see #postInvalidateDelayed(long, int, int, int, int) 10665 */ 10666 public void postInvalidate(int left, int top, int right, int bottom) { 10667 postInvalidateDelayed(0, left, top, right, bottom); 10668 } 10669 10670 /** 10671 * <p>Cause an invalidate to happen on a subsequent cycle through the event 10672 * loop. Waits for the specified amount of time.</p> 10673 * 10674 * <p>This method can be invoked from outside of the UI thread 10675 * only when this View is attached to a window.</p> 10676 * 10677 * @param delayMilliseconds the duration in milliseconds to delay the 10678 * invalidation by 10679 * 10680 * @see #invalidate() 10681 * @see #postInvalidate() 10682 */ 10683 public void postInvalidateDelayed(long delayMilliseconds) { 10684 // We try only with the AttachInfo because there's no point in invalidating 10685 // if we are not attached to our window 10686 final AttachInfo attachInfo = mAttachInfo; 10687 if (attachInfo != null) { 10688 attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); 10689 } 10690 } 10691 10692 /** 10693 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 10694 * through the event loop. Waits for the specified amount of time.</p> 10695 * 10696 * <p>This method can be invoked from outside of the UI thread 10697 * only when this View is attached to a window.</p> 10698 * 10699 * @param delayMilliseconds the duration in milliseconds to delay the 10700 * invalidation by 10701 * @param left The left coordinate of the rectangle to invalidate. 10702 * @param top The top coordinate of the rectangle to invalidate. 10703 * @param right The right coordinate of the rectangle to invalidate. 10704 * @param bottom The bottom coordinate of the rectangle to invalidate. 10705 * 10706 * @see #invalidate(int, int, int, int) 10707 * @see #invalidate(Rect) 10708 * @see #postInvalidate(int, int, int, int) 10709 */ 10710 public void postInvalidateDelayed(long delayMilliseconds, int left, int top, 10711 int right, int bottom) { 10712 10713 // We try only with the AttachInfo because there's no point in invalidating 10714 // if we are not attached to our window 10715 final AttachInfo attachInfo = mAttachInfo; 10716 if (attachInfo != null) { 10717 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.acquire(); 10718 info.target = this; 10719 info.left = left; 10720 info.top = top; 10721 info.right = right; 10722 info.bottom = bottom; 10723 10724 attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); 10725 } 10726 } 10727 10728 /** 10729 * <p>Cause an invalidate to happen on the next animation time step, typically the 10730 * next display frame.</p> 10731 * 10732 * <p>This method can be invoked from outside of the UI thread 10733 * only when this View is attached to a window.</p> 10734 * 10735 * @see #invalidate() 10736 */ 10737 public void postInvalidateOnAnimation() { 10738 // We try only with the AttachInfo because there's no point in invalidating 10739 // if we are not attached to our window 10740 final AttachInfo attachInfo = mAttachInfo; 10741 if (attachInfo != null) { 10742 attachInfo.mViewRootImpl.dispatchInvalidateOnAnimation(this); 10743 } 10744 } 10745 10746 /** 10747 * <p>Cause an invalidate of the specified area to happen on the next animation 10748 * time step, typically the next display frame.</p> 10749 * 10750 * <p>This method can be invoked from outside of the UI thread 10751 * only when this View is attached to a window.</p> 10752 * 10753 * @param left The left coordinate of the rectangle to invalidate. 10754 * @param top The top coordinate of the rectangle to invalidate. 10755 * @param right The right coordinate of the rectangle to invalidate. 10756 * @param bottom The bottom coordinate of the rectangle to invalidate. 10757 * 10758 * @see #invalidate(int, int, int, int) 10759 * @see #invalidate(Rect) 10760 */ 10761 public void postInvalidateOnAnimation(int left, int top, int right, int bottom) { 10762 // We try only with the AttachInfo because there's no point in invalidating 10763 // if we are not attached to our window 10764 final AttachInfo attachInfo = mAttachInfo; 10765 if (attachInfo != null) { 10766 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.acquire(); 10767 info.target = this; 10768 info.left = left; 10769 info.top = top; 10770 info.right = right; 10771 info.bottom = bottom; 10772 10773 attachInfo.mViewRootImpl.dispatchInvalidateRectOnAnimation(info); 10774 } 10775 } 10776 10777 /** 10778 * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. 10779 * This event is sent at most once every 10780 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. 10781 */ 10782 private void postSendViewScrolledAccessibilityEventCallback() { 10783 if (mSendViewScrolledAccessibilityEvent == null) { 10784 mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); 10785 } 10786 if (!mSendViewScrolledAccessibilityEvent.mIsPending) { 10787 mSendViewScrolledAccessibilityEvent.mIsPending = true; 10788 postDelayed(mSendViewScrolledAccessibilityEvent, 10789 ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); 10790 } 10791 } 10792 10793 /** 10794 * Called by a parent to request that a child update its values for mScrollX 10795 * and mScrollY if necessary. This will typically be done if the child is 10796 * animating a scroll using a {@link android.widget.Scroller Scroller} 10797 * object. 10798 */ 10799 public void computeScroll() { 10800 } 10801 10802 /** 10803 * <p>Indicate whether the horizontal edges are faded when the view is 10804 * scrolled horizontally.</p> 10805 * 10806 * @return true if the horizontal edges should are faded on scroll, false 10807 * otherwise 10808 * 10809 * @see #setHorizontalFadingEdgeEnabled(boolean) 10810 * 10811 * @attr ref android.R.styleable#View_requiresFadingEdge 10812 */ 10813 public boolean isHorizontalFadingEdgeEnabled() { 10814 return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; 10815 } 10816 10817 /** 10818 * <p>Define whether the horizontal edges should be faded when this view 10819 * is scrolled horizontally.</p> 10820 * 10821 * @param horizontalFadingEdgeEnabled true if the horizontal edges should 10822 * be faded when the view is scrolled 10823 * horizontally 10824 * 10825 * @see #isHorizontalFadingEdgeEnabled() 10826 * 10827 * @attr ref android.R.styleable#View_requiresFadingEdge 10828 */ 10829 public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { 10830 if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { 10831 if (horizontalFadingEdgeEnabled) { 10832 initScrollCache(); 10833 } 10834 10835 mViewFlags ^= FADING_EDGE_HORIZONTAL; 10836 } 10837 } 10838 10839 /** 10840 * <p>Indicate whether the vertical edges are faded when the view is 10841 * scrolled horizontally.</p> 10842 * 10843 * @return true if the vertical edges should are faded on scroll, false 10844 * otherwise 10845 * 10846 * @see #setVerticalFadingEdgeEnabled(boolean) 10847 * 10848 * @attr ref android.R.styleable#View_requiresFadingEdge 10849 */ 10850 public boolean isVerticalFadingEdgeEnabled() { 10851 return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; 10852 } 10853 10854 /** 10855 * <p>Define whether the vertical edges should be faded when this view 10856 * is scrolled vertically.</p> 10857 * 10858 * @param verticalFadingEdgeEnabled true if the vertical edges should 10859 * be faded when the view is scrolled 10860 * vertically 10861 * 10862 * @see #isVerticalFadingEdgeEnabled() 10863 * 10864 * @attr ref android.R.styleable#View_requiresFadingEdge 10865 */ 10866 public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { 10867 if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { 10868 if (verticalFadingEdgeEnabled) { 10869 initScrollCache(); 10870 } 10871 10872 mViewFlags ^= FADING_EDGE_VERTICAL; 10873 } 10874 } 10875 10876 /** 10877 * Returns the strength, or intensity, of the top faded edge. The strength is 10878 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 10879 * returns 0.0 or 1.0 but no value in between. 10880 * 10881 * Subclasses should override this method to provide a smoother fade transition 10882 * when scrolling occurs. 10883 * 10884 * @return the intensity of the top fade as a float between 0.0f and 1.0f 10885 */ 10886 protected float getTopFadingEdgeStrength() { 10887 return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; 10888 } 10889 10890 /** 10891 * Returns the strength, or intensity, of the bottom faded edge. The strength is 10892 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 10893 * returns 0.0 or 1.0 but no value in between. 10894 * 10895 * Subclasses should override this method to provide a smoother fade transition 10896 * when scrolling occurs. 10897 * 10898 * @return the intensity of the bottom fade as a float between 0.0f and 1.0f 10899 */ 10900 protected float getBottomFadingEdgeStrength() { 10901 return computeVerticalScrollOffset() + computeVerticalScrollExtent() < 10902 computeVerticalScrollRange() ? 1.0f : 0.0f; 10903 } 10904 10905 /** 10906 * Returns the strength, or intensity, of the left faded edge. The strength is 10907 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 10908 * returns 0.0 or 1.0 but no value in between. 10909 * 10910 * Subclasses should override this method to provide a smoother fade transition 10911 * when scrolling occurs. 10912 * 10913 * @return the intensity of the left fade as a float between 0.0f and 1.0f 10914 */ 10915 protected float getLeftFadingEdgeStrength() { 10916 return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; 10917 } 10918 10919 /** 10920 * Returns the strength, or intensity, of the right faded edge. The strength is 10921 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 10922 * returns 0.0 or 1.0 but no value in between. 10923 * 10924 * Subclasses should override this method to provide a smoother fade transition 10925 * when scrolling occurs. 10926 * 10927 * @return the intensity of the right fade as a float between 0.0f and 1.0f 10928 */ 10929 protected float getRightFadingEdgeStrength() { 10930 return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < 10931 computeHorizontalScrollRange() ? 1.0f : 0.0f; 10932 } 10933 10934 /** 10935 * <p>Indicate whether the horizontal scrollbar should be drawn or not. The 10936 * scrollbar is not drawn by default.</p> 10937 * 10938 * @return true if the horizontal scrollbar should be painted, false 10939 * otherwise 10940 * 10941 * @see #setHorizontalScrollBarEnabled(boolean) 10942 */ 10943 public boolean isHorizontalScrollBarEnabled() { 10944 return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 10945 } 10946 10947 /** 10948 * <p>Define whether the horizontal scrollbar should be drawn or not. The 10949 * scrollbar is not drawn by default.</p> 10950 * 10951 * @param horizontalScrollBarEnabled true if the horizontal scrollbar should 10952 * be painted 10953 * 10954 * @see #isHorizontalScrollBarEnabled() 10955 */ 10956 public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { 10957 if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { 10958 mViewFlags ^= SCROLLBARS_HORIZONTAL; 10959 computeOpaqueFlags(); 10960 resolvePadding(); 10961 } 10962 } 10963 10964 /** 10965 * <p>Indicate whether the vertical scrollbar should be drawn or not. The 10966 * scrollbar is not drawn by default.</p> 10967 * 10968 * @return true if the vertical scrollbar should be painted, false 10969 * otherwise 10970 * 10971 * @see #setVerticalScrollBarEnabled(boolean) 10972 */ 10973 public boolean isVerticalScrollBarEnabled() { 10974 return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; 10975 } 10976 10977 /** 10978 * <p>Define whether the vertical scrollbar should be drawn or not. The 10979 * scrollbar is not drawn by default.</p> 10980 * 10981 * @param verticalScrollBarEnabled true if the vertical scrollbar should 10982 * be painted 10983 * 10984 * @see #isVerticalScrollBarEnabled() 10985 */ 10986 public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { 10987 if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { 10988 mViewFlags ^= SCROLLBARS_VERTICAL; 10989 computeOpaqueFlags(); 10990 resolvePadding(); 10991 } 10992 } 10993 10994 /** 10995 * @hide 10996 */ 10997 protected void recomputePadding() { 10998 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 10999 } 11000 11001 /** 11002 * Define whether scrollbars will fade when the view is not scrolling. 11003 * 11004 * @param fadeScrollbars wheter to enable fading 11005 * 11006 * @attr ref android.R.styleable#View_fadeScrollbars 11007 */ 11008 public void setScrollbarFadingEnabled(boolean fadeScrollbars) { 11009 initScrollCache(); 11010 final ScrollabilityCache scrollabilityCache = mScrollCache; 11011 scrollabilityCache.fadeScrollBars = fadeScrollbars; 11012 if (fadeScrollbars) { 11013 scrollabilityCache.state = ScrollabilityCache.OFF; 11014 } else { 11015 scrollabilityCache.state = ScrollabilityCache.ON; 11016 } 11017 } 11018 11019 /** 11020 * 11021 * Returns true if scrollbars will fade when this view is not scrolling 11022 * 11023 * @return true if scrollbar fading is enabled 11024 * 11025 * @attr ref android.R.styleable#View_fadeScrollbars 11026 */ 11027 public boolean isScrollbarFadingEnabled() { 11028 return mScrollCache != null && mScrollCache.fadeScrollBars; 11029 } 11030 11031 /** 11032 * 11033 * Returns the delay before scrollbars fade. 11034 * 11035 * @return the delay before scrollbars fade 11036 * 11037 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 11038 */ 11039 public int getScrollBarDefaultDelayBeforeFade() { 11040 return mScrollCache == null ? ViewConfiguration.getScrollDefaultDelay() : 11041 mScrollCache.scrollBarDefaultDelayBeforeFade; 11042 } 11043 11044 /** 11045 * Define the delay before scrollbars fade. 11046 * 11047 * @param scrollBarDefaultDelayBeforeFade - the delay before scrollbars fade 11048 * 11049 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 11050 */ 11051 public void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) { 11052 getScrollCache().scrollBarDefaultDelayBeforeFade = scrollBarDefaultDelayBeforeFade; 11053 } 11054 11055 /** 11056 * 11057 * Returns the scrollbar fade duration. 11058 * 11059 * @return the scrollbar fade duration 11060 * 11061 * @attr ref android.R.styleable#View_scrollbarFadeDuration 11062 */ 11063 public int getScrollBarFadeDuration() { 11064 return mScrollCache == null ? ViewConfiguration.getScrollBarFadeDuration() : 11065 mScrollCache.scrollBarFadeDuration; 11066 } 11067 11068 /** 11069 * Define the scrollbar fade duration. 11070 * 11071 * @param scrollBarFadeDuration - the scrollbar fade duration 11072 * 11073 * @attr ref android.R.styleable#View_scrollbarFadeDuration 11074 */ 11075 public void setScrollBarFadeDuration(int scrollBarFadeDuration) { 11076 getScrollCache().scrollBarFadeDuration = scrollBarFadeDuration; 11077 } 11078 11079 /** 11080 * 11081 * Returns the scrollbar size. 11082 * 11083 * @return the scrollbar size 11084 * 11085 * @attr ref android.R.styleable#View_scrollbarSize 11086 */ 11087 public int getScrollBarSize() { 11088 return mScrollCache == null ? ViewConfiguration.get(mContext).getScaledScrollBarSize() : 11089 mScrollCache.scrollBarSize; 11090 } 11091 11092 /** 11093 * Define the scrollbar size. 11094 * 11095 * @param scrollBarSize - the scrollbar size 11096 * 11097 * @attr ref android.R.styleable#View_scrollbarSize 11098 */ 11099 public void setScrollBarSize(int scrollBarSize) { 11100 getScrollCache().scrollBarSize = scrollBarSize; 11101 } 11102 11103 /** 11104 * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or 11105 * inset. When inset, they add to the padding of the view. And the scrollbars 11106 * can be drawn inside the padding area or on the edge of the view. For example, 11107 * if a view has a background drawable and you want to draw the scrollbars 11108 * inside the padding specified by the drawable, you can use 11109 * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to 11110 * appear at the edge of the view, ignoring the padding, then you can use 11111 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> 11112 * @param style the style of the scrollbars. Should be one of 11113 * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, 11114 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. 11115 * @see #SCROLLBARS_INSIDE_OVERLAY 11116 * @see #SCROLLBARS_INSIDE_INSET 11117 * @see #SCROLLBARS_OUTSIDE_OVERLAY 11118 * @see #SCROLLBARS_OUTSIDE_INSET 11119 * 11120 * @attr ref android.R.styleable#View_scrollbarStyle 11121 */ 11122 public void setScrollBarStyle(int style) { 11123 if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { 11124 mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); 11125 computeOpaqueFlags(); 11126 resolvePadding(); 11127 } 11128 } 11129 11130 /** 11131 * <p>Returns the current scrollbar style.</p> 11132 * @return the current scrollbar style 11133 * @see #SCROLLBARS_INSIDE_OVERLAY 11134 * @see #SCROLLBARS_INSIDE_INSET 11135 * @see #SCROLLBARS_OUTSIDE_OVERLAY 11136 * @see #SCROLLBARS_OUTSIDE_INSET 11137 * 11138 * @attr ref android.R.styleable#View_scrollbarStyle 11139 */ 11140 @ViewDebug.ExportedProperty(mapping = { 11141 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), 11142 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), 11143 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), 11144 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") 11145 }) 11146 public int getScrollBarStyle() { 11147 return mViewFlags & SCROLLBARS_STYLE_MASK; 11148 } 11149 11150 /** 11151 * <p>Compute the horizontal range that the horizontal scrollbar 11152 * represents.</p> 11153 * 11154 * <p>The range is expressed in arbitrary units that must be the same as the 11155 * units used by {@link #computeHorizontalScrollExtent()} and 11156 * {@link #computeHorizontalScrollOffset()}.</p> 11157 * 11158 * <p>The default range is the drawing width of this view.</p> 11159 * 11160 * @return the total horizontal range represented by the horizontal 11161 * scrollbar 11162 * 11163 * @see #computeHorizontalScrollExtent() 11164 * @see #computeHorizontalScrollOffset() 11165 * @see android.widget.ScrollBarDrawable 11166 */ 11167 protected int computeHorizontalScrollRange() { 11168 return getWidth(); 11169 } 11170 11171 /** 11172 * <p>Compute the horizontal offset of the horizontal scrollbar's thumb 11173 * within the horizontal range. This value is used to compute the position 11174 * of the thumb within the scrollbar's track.</p> 11175 * 11176 * <p>The range is expressed in arbitrary units that must be the same as the 11177 * units used by {@link #computeHorizontalScrollRange()} and 11178 * {@link #computeHorizontalScrollExtent()}.</p> 11179 * 11180 * <p>The default offset is the scroll offset of this view.</p> 11181 * 11182 * @return the horizontal offset of the scrollbar's thumb 11183 * 11184 * @see #computeHorizontalScrollRange() 11185 * @see #computeHorizontalScrollExtent() 11186 * @see android.widget.ScrollBarDrawable 11187 */ 11188 protected int computeHorizontalScrollOffset() { 11189 return mScrollX; 11190 } 11191 11192 /** 11193 * <p>Compute the horizontal extent of the horizontal scrollbar's thumb 11194 * within the horizontal range. This value is used to compute the length 11195 * of the thumb within the scrollbar's track.</p> 11196 * 11197 * <p>The range is expressed in arbitrary units that must be the same as the 11198 * units used by {@link #computeHorizontalScrollRange()} and 11199 * {@link #computeHorizontalScrollOffset()}.</p> 11200 * 11201 * <p>The default extent is the drawing width of this view.</p> 11202 * 11203 * @return the horizontal extent of the scrollbar's thumb 11204 * 11205 * @see #computeHorizontalScrollRange() 11206 * @see #computeHorizontalScrollOffset() 11207 * @see android.widget.ScrollBarDrawable 11208 */ 11209 protected int computeHorizontalScrollExtent() { 11210 return getWidth(); 11211 } 11212 11213 /** 11214 * <p>Compute the vertical range that the vertical scrollbar represents.</p> 11215 * 11216 * <p>The range is expressed in arbitrary units that must be the same as the 11217 * units used by {@link #computeVerticalScrollExtent()} and 11218 * {@link #computeVerticalScrollOffset()}.</p> 11219 * 11220 * @return the total vertical range represented by the vertical scrollbar 11221 * 11222 * <p>The default range is the drawing height of this view.</p> 11223 * 11224 * @see #computeVerticalScrollExtent() 11225 * @see #computeVerticalScrollOffset() 11226 * @see android.widget.ScrollBarDrawable 11227 */ 11228 protected int computeVerticalScrollRange() { 11229 return getHeight(); 11230 } 11231 11232 /** 11233 * <p>Compute the vertical offset of the vertical scrollbar's thumb 11234 * within the horizontal range. This value is used to compute the position 11235 * of the thumb within the scrollbar's track.</p> 11236 * 11237 * <p>The range is expressed in arbitrary units that must be the same as the 11238 * units used by {@link #computeVerticalScrollRange()} and 11239 * {@link #computeVerticalScrollExtent()}.</p> 11240 * 11241 * <p>The default offset is the scroll offset of this view.</p> 11242 * 11243 * @return the vertical offset of the scrollbar's thumb 11244 * 11245 * @see #computeVerticalScrollRange() 11246 * @see #computeVerticalScrollExtent() 11247 * @see android.widget.ScrollBarDrawable 11248 */ 11249 protected int computeVerticalScrollOffset() { 11250 return mScrollY; 11251 } 11252 11253 /** 11254 * <p>Compute the vertical extent of the horizontal scrollbar's thumb 11255 * within the vertical range. This value is used to compute the length 11256 * of the thumb within the scrollbar's track.</p> 11257 * 11258 * <p>The range is expressed in arbitrary units that must be the same as the 11259 * units used by {@link #computeVerticalScrollRange()} and 11260 * {@link #computeVerticalScrollOffset()}.</p> 11261 * 11262 * <p>The default extent is the drawing height of this view.</p> 11263 * 11264 * @return the vertical extent of the scrollbar's thumb 11265 * 11266 * @see #computeVerticalScrollRange() 11267 * @see #computeVerticalScrollOffset() 11268 * @see android.widget.ScrollBarDrawable 11269 */ 11270 protected int computeVerticalScrollExtent() { 11271 return getHeight(); 11272 } 11273 11274 /** 11275 * Check if this view can be scrolled horizontally in a certain direction. 11276 * 11277 * @param direction Negative to check scrolling left, positive to check scrolling right. 11278 * @return true if this view can be scrolled in the specified direction, false otherwise. 11279 */ 11280 public boolean canScrollHorizontally(int direction) { 11281 final int offset = computeHorizontalScrollOffset(); 11282 final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); 11283 if (range == 0) return false; 11284 if (direction < 0) { 11285 return offset > 0; 11286 } else { 11287 return offset < range - 1; 11288 } 11289 } 11290 11291 /** 11292 * Check if this view can be scrolled vertically in a certain direction. 11293 * 11294 * @param direction Negative to check scrolling up, positive to check scrolling down. 11295 * @return true if this view can be scrolled in the specified direction, false otherwise. 11296 */ 11297 public boolean canScrollVertically(int direction) { 11298 final int offset = computeVerticalScrollOffset(); 11299 final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); 11300 if (range == 0) return false; 11301 if (direction < 0) { 11302 return offset > 0; 11303 } else { 11304 return offset < range - 1; 11305 } 11306 } 11307 11308 /** 11309 * <p>Request the drawing of the horizontal and the vertical scrollbar. The 11310 * scrollbars are painted only if they have been awakened first.</p> 11311 * 11312 * @param canvas the canvas on which to draw the scrollbars 11313 * 11314 * @see #awakenScrollBars(int) 11315 */ 11316 protected final void onDrawScrollBars(Canvas canvas) { 11317 // scrollbars are drawn only when the animation is running 11318 final ScrollabilityCache cache = mScrollCache; 11319 if (cache != null) { 11320 11321 int state = cache.state; 11322 11323 if (state == ScrollabilityCache.OFF) { 11324 return; 11325 } 11326 11327 boolean invalidate = false; 11328 11329 if (state == ScrollabilityCache.FADING) { 11330 // We're fading -- get our fade interpolation 11331 if (cache.interpolatorValues == null) { 11332 cache.interpolatorValues = new float[1]; 11333 } 11334 11335 float[] values = cache.interpolatorValues; 11336 11337 // Stops the animation if we're done 11338 if (cache.scrollBarInterpolator.timeToValues(values) == 11339 Interpolator.Result.FREEZE_END) { 11340 cache.state = ScrollabilityCache.OFF; 11341 } else { 11342 cache.scrollBar.setAlpha(Math.round(values[0])); 11343 } 11344 11345 // This will make the scroll bars inval themselves after 11346 // drawing. We only want this when we're fading so that 11347 // we prevent excessive redraws 11348 invalidate = true; 11349 } else { 11350 // We're just on -- but we may have been fading before so 11351 // reset alpha 11352 cache.scrollBar.setAlpha(255); 11353 } 11354 11355 11356 final int viewFlags = mViewFlags; 11357 11358 final boolean drawHorizontalScrollBar = 11359 (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 11360 final boolean drawVerticalScrollBar = 11361 (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL 11362 && !isVerticalScrollBarHidden(); 11363 11364 if (drawVerticalScrollBar || drawHorizontalScrollBar) { 11365 final int width = mRight - mLeft; 11366 final int height = mBottom - mTop; 11367 11368 final ScrollBarDrawable scrollBar = cache.scrollBar; 11369 11370 final int scrollX = mScrollX; 11371 final int scrollY = mScrollY; 11372 final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; 11373 11374 int left, top, right, bottom; 11375 11376 if (drawHorizontalScrollBar) { 11377 int size = scrollBar.getSize(false); 11378 if (size <= 0) { 11379 size = cache.scrollBarSize; 11380 } 11381 11382 scrollBar.setParameters(computeHorizontalScrollRange(), 11383 computeHorizontalScrollOffset(), 11384 computeHorizontalScrollExtent(), false); 11385 final int verticalScrollBarGap = drawVerticalScrollBar ? 11386 getVerticalScrollbarWidth() : 0; 11387 top = scrollY + height - size - (mUserPaddingBottom & inside); 11388 left = scrollX + (mPaddingLeft & inside); 11389 right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; 11390 bottom = top + size; 11391 onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); 11392 if (invalidate) { 11393 invalidate(left, top, right, bottom); 11394 } 11395 } 11396 11397 if (drawVerticalScrollBar) { 11398 int size = scrollBar.getSize(true); 11399 if (size <= 0) { 11400 size = cache.scrollBarSize; 11401 } 11402 11403 scrollBar.setParameters(computeVerticalScrollRange(), 11404 computeVerticalScrollOffset(), 11405 computeVerticalScrollExtent(), true); 11406 int verticalScrollbarPosition = mVerticalScrollbarPosition; 11407 if (verticalScrollbarPosition == SCROLLBAR_POSITION_DEFAULT) { 11408 verticalScrollbarPosition = isLayoutRtl() ? 11409 SCROLLBAR_POSITION_LEFT : SCROLLBAR_POSITION_RIGHT; 11410 } 11411 switch (verticalScrollbarPosition) { 11412 default: 11413 case SCROLLBAR_POSITION_RIGHT: 11414 left = scrollX + width - size - (mUserPaddingRight & inside); 11415 break; 11416 case SCROLLBAR_POSITION_LEFT: 11417 left = scrollX + (mUserPaddingLeft & inside); 11418 break; 11419 } 11420 top = scrollY + (mPaddingTop & inside); 11421 right = left + size; 11422 bottom = scrollY + height - (mUserPaddingBottom & inside); 11423 onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); 11424 if (invalidate) { 11425 invalidate(left, top, right, bottom); 11426 } 11427 } 11428 } 11429 } 11430 } 11431 11432 /** 11433 * Override this if the vertical scrollbar needs to be hidden in a subclass, like when 11434 * FastScroller is visible. 11435 * @return whether to temporarily hide the vertical scrollbar 11436 * @hide 11437 */ 11438 protected boolean isVerticalScrollBarHidden() { 11439 return false; 11440 } 11441 11442 /** 11443 * <p>Draw the horizontal scrollbar if 11444 * {@link #isHorizontalScrollBarEnabled()} returns true.</p> 11445 * 11446 * @param canvas the canvas on which to draw the scrollbar 11447 * @param scrollBar the scrollbar's drawable 11448 * 11449 * @see #isHorizontalScrollBarEnabled() 11450 * @see #computeHorizontalScrollRange() 11451 * @see #computeHorizontalScrollExtent() 11452 * @see #computeHorizontalScrollOffset() 11453 * @see android.widget.ScrollBarDrawable 11454 * @hide 11455 */ 11456 protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, 11457 int l, int t, int r, int b) { 11458 scrollBar.setBounds(l, t, r, b); 11459 scrollBar.draw(canvas); 11460 } 11461 11462 /** 11463 * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} 11464 * returns true.</p> 11465 * 11466 * @param canvas the canvas on which to draw the scrollbar 11467 * @param scrollBar the scrollbar's drawable 11468 * 11469 * @see #isVerticalScrollBarEnabled() 11470 * @see #computeVerticalScrollRange() 11471 * @see #computeVerticalScrollExtent() 11472 * @see #computeVerticalScrollOffset() 11473 * @see android.widget.ScrollBarDrawable 11474 * @hide 11475 */ 11476 protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, 11477 int l, int t, int r, int b) { 11478 scrollBar.setBounds(l, t, r, b); 11479 scrollBar.draw(canvas); 11480 } 11481 11482 /** 11483 * Implement this to do your drawing. 11484 * 11485 * @param canvas the canvas on which the background will be drawn 11486 */ 11487 protected void onDraw(Canvas canvas) { 11488 } 11489 11490 /* 11491 * Caller is responsible for calling requestLayout if necessary. 11492 * (This allows addViewInLayout to not request a new layout.) 11493 */ 11494 void assignParent(ViewParent parent) { 11495 if (mParent == null) { 11496 mParent = parent; 11497 } else if (parent == null) { 11498 mParent = null; 11499 } else { 11500 throw new RuntimeException("view " + this + " being added, but" 11501 + " it already has a parent"); 11502 } 11503 } 11504 11505 /** 11506 * This is called when the view is attached to a window. At this point it 11507 * has a Surface and will start drawing. Note that this function is 11508 * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, 11509 * however it may be called any time before the first onDraw -- including 11510 * before or after {@link #onMeasure(int, int)}. 11511 * 11512 * @see #onDetachedFromWindow() 11513 */ 11514 protected void onAttachedToWindow() { 11515 if ((mPrivateFlags & PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 11516 mParent.requestTransparentRegion(this); 11517 } 11518 11519 if ((mPrivateFlags & PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH) != 0) { 11520 initialAwakenScrollBars(); 11521 mPrivateFlags &= ~PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH; 11522 } 11523 11524 jumpDrawablesToCurrentState(); 11525 11526 clearAccessibilityFocus(); 11527 if (isFocused()) { 11528 InputMethodManager imm = InputMethodManager.peekInstance(); 11529 imm.focusIn(this); 11530 } 11531 11532 if (mAttachInfo != null && mDisplayList != null) { 11533 mAttachInfo.mViewRootImpl.dequeueDisplayList(mDisplayList); 11534 } 11535 } 11536 11537 /** 11538 * Resolve all RTL related properties. 11539 */ 11540 void resolveRtlPropertiesIfNeeded() { 11541 if (!needRtlPropertiesResolution()) return; 11542 11543 // Order is important here: LayoutDirection MUST be resolved first 11544 if (!isLayoutDirectionResolved()) { 11545 resolveLayoutDirection(); 11546 resolveLayoutParams(); 11547 } 11548 // ... then we can resolve the others properties depending on the resolved LayoutDirection. 11549 if (!isTextDirectionResolved()) { 11550 resolveTextDirection(); 11551 } 11552 if (!isTextAlignmentResolved()) { 11553 resolveTextAlignment(); 11554 } 11555 if (!isPaddingResolved()) { 11556 resolvePadding(); 11557 } 11558 if (!isDrawablesResolved()) { 11559 resolveDrawables(); 11560 } 11561 requestLayout(); 11562 invalidate(true); 11563 onRtlPropertiesChanged(getLayoutDirection()); 11564 } 11565 11566 // Reset resolution of all RTL related properties. 11567 void resetRtlProperties() { 11568 resetResolvedLayoutDirection(); 11569 resetResolvedTextDirection(); 11570 resetResolvedTextAlignment(); 11571 resetResolvedPadding(); 11572 resetResolvedDrawables(); 11573 } 11574 11575 /** 11576 * @see #onScreenStateChanged(int) 11577 */ 11578 void dispatchScreenStateChanged(int screenState) { 11579 onScreenStateChanged(screenState); 11580 } 11581 11582 /** 11583 * This method is called whenever the state of the screen this view is 11584 * attached to changes. A state change will usually occurs when the screen 11585 * turns on or off (whether it happens automatically or the user does it 11586 * manually.) 11587 * 11588 * @param screenState The new state of the screen. Can be either 11589 * {@link #SCREEN_STATE_ON} or {@link #SCREEN_STATE_OFF} 11590 */ 11591 public void onScreenStateChanged(int screenState) { 11592 } 11593 11594 /** 11595 * Return true if the application tag in the AndroidManifest has set "supportRtl" to true 11596 */ 11597 private boolean hasRtlSupport() { 11598 return mContext.getApplicationInfo().hasRtlSupport(); 11599 } 11600 11601 /** 11602 * Return true if we are in RTL compatibility mode (either before Jelly Bean MR1 or 11603 * RTL not supported) 11604 */ 11605 private boolean isRtlCompatibilityMode() { 11606 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 11607 return targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport(); 11608 } 11609 11610 /** 11611 * @return true if RTL properties need resolution. 11612 */ 11613 private boolean needRtlPropertiesResolution() { 11614 return (mPrivateFlags2 & ALL_RTL_PROPERTIES_RESOLVED) != ALL_RTL_PROPERTIES_RESOLVED; 11615 } 11616 11617 /** 11618 * Called when any RTL property (layout direction or text direction or text alignment) has 11619 * been changed. 11620 * 11621 * Subclasses need to override this method to take care of cached information that depends on the 11622 * resolved layout direction, or to inform child views that inherit their layout direction. 11623 * 11624 * The default implementation does nothing. 11625 * 11626 * @param layoutDirection the direction of the layout 11627 * 11628 * @see #LAYOUT_DIRECTION_LTR 11629 * @see #LAYOUT_DIRECTION_RTL 11630 */ 11631 public void onRtlPropertiesChanged(int layoutDirection) { 11632 } 11633 11634 /** 11635 * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing 11636 * that the parent directionality can and will be resolved before its children. 11637 * 11638 * @return true if resolution has been done, false otherwise. 11639 * 11640 * @hide 11641 */ 11642 public boolean resolveLayoutDirection() { 11643 // Clear any previous layout direction resolution 11644 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 11645 11646 if (hasRtlSupport()) { 11647 // Set resolved depending on layout direction 11648 switch ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> 11649 PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) { 11650 case LAYOUT_DIRECTION_INHERIT: 11651 // We cannot resolve yet. LTR is by default and let the resolution happen again 11652 // later to get the correct resolved value 11653 if (!canResolveLayoutDirection()) return false; 11654 11655 View parent = ((View) mParent); 11656 // Parent has not yet resolved, LTR is still the default 11657 if (!parent.isLayoutDirectionResolved()) return false; 11658 11659 if (parent.getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 11660 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 11661 } 11662 break; 11663 case LAYOUT_DIRECTION_RTL: 11664 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 11665 break; 11666 case LAYOUT_DIRECTION_LOCALE: 11667 if((LAYOUT_DIRECTION_RTL == 11668 TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()))) { 11669 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 11670 } 11671 break; 11672 default: 11673 // Nothing to do, LTR by default 11674 } 11675 } 11676 11677 // Set to resolved 11678 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 11679 return true; 11680 } 11681 11682 /** 11683 * Check if layout direction resolution can be done. 11684 * 11685 * @return true if layout direction resolution can be done otherwise return false. 11686 * 11687 * @hide 11688 */ 11689 public boolean canResolveLayoutDirection() { 11690 switch (getRawLayoutDirection()) { 11691 case LAYOUT_DIRECTION_INHERIT: 11692 return (mParent != null) && (mParent instanceof ViewGroup) && 11693 ((ViewGroup) mParent).canResolveLayoutDirection(); 11694 default: 11695 return true; 11696 } 11697 } 11698 11699 /** 11700 * Reset the resolved layout direction. Layout direction will be resolved during a call to 11701 * {@link #onMeasure(int, int)}. 11702 * 11703 * @hide 11704 */ 11705 public void resetResolvedLayoutDirection() { 11706 // Reset the current resolved bits 11707 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 11708 } 11709 11710 /** 11711 * @return true if the layout direction is inherited. 11712 * 11713 * @hide 11714 */ 11715 public boolean isLayoutDirectionInherited() { 11716 return (getRawLayoutDirection() == LAYOUT_DIRECTION_INHERIT); 11717 } 11718 11719 /** 11720 * @return true if layout direction has been resolved. 11721 */ 11722 private boolean isLayoutDirectionResolved() { 11723 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED) == PFLAG2_LAYOUT_DIRECTION_RESOLVED; 11724 } 11725 11726 /** 11727 * Return if padding has been resolved 11728 * 11729 * @hide 11730 */ 11731 boolean isPaddingResolved() { 11732 return (mPrivateFlags2 & PFLAG2_PADDING_RESOLVED) == PFLAG2_PADDING_RESOLVED; 11733 } 11734 11735 /** 11736 * Resolve padding depending on layout direction. 11737 * 11738 * @hide 11739 */ 11740 public void resolvePadding() { 11741 if (!isRtlCompatibilityMode()) { 11742 // Post Jelly Bean MR1 case: we need to take the resolved layout direction into account. 11743 // If start / end padding are defined, they will be resolved (hence overriding) to 11744 // left / right or right / left depending on the resolved layout direction. 11745 // If start / end padding are not defined, use the left / right ones. 11746 int resolvedLayoutDirection = getLayoutDirection(); 11747 // Set user padding to initial values ... 11748 mUserPaddingLeft = (mUserPaddingLeftInitial == UNDEFINED_PADDING) ? 11749 0 : mUserPaddingLeftInitial; 11750 mUserPaddingRight = (mUserPaddingRightInitial == UNDEFINED_PADDING) ? 11751 0 : mUserPaddingRightInitial; 11752 // ... then resolve it. 11753 switch (resolvedLayoutDirection) { 11754 case LAYOUT_DIRECTION_RTL: 11755 if (mUserPaddingStart != UNDEFINED_PADDING) { 11756 mUserPaddingRight = mUserPaddingStart; 11757 } 11758 if (mUserPaddingEnd != UNDEFINED_PADDING) { 11759 mUserPaddingLeft = mUserPaddingEnd; 11760 } 11761 break; 11762 case LAYOUT_DIRECTION_LTR: 11763 default: 11764 if (mUserPaddingStart != UNDEFINED_PADDING) { 11765 mUserPaddingLeft = mUserPaddingStart; 11766 } 11767 if (mUserPaddingEnd != UNDEFINED_PADDING) { 11768 mUserPaddingRight = mUserPaddingEnd; 11769 } 11770 } 11771 11772 mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; 11773 11774 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, 11775 mUserPaddingBottom); 11776 onRtlPropertiesChanged(resolvedLayoutDirection); 11777 } 11778 11779 mPrivateFlags2 |= PFLAG2_PADDING_RESOLVED; 11780 } 11781 11782 /** 11783 * Reset the resolved layout direction. 11784 * 11785 * @hide 11786 */ 11787 public void resetResolvedPadding() { 11788 mPrivateFlags2 &= ~PFLAG2_PADDING_RESOLVED; 11789 } 11790 11791 /** 11792 * This is called when the view is detached from a window. At this point it 11793 * no longer has a surface for drawing. 11794 * 11795 * @see #onAttachedToWindow() 11796 */ 11797 protected void onDetachedFromWindow() { 11798 mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT; 11799 11800 removeUnsetPressCallback(); 11801 removeLongPressCallback(); 11802 removePerformClickCallback(); 11803 removeSendViewScrolledAccessibilityEventCallback(); 11804 11805 destroyDrawingCache(); 11806 11807 destroyLayer(false); 11808 11809 if (mAttachInfo != null) { 11810 if (mDisplayList != null) { 11811 mAttachInfo.mViewRootImpl.enqueueDisplayList(mDisplayList); 11812 } 11813 mAttachInfo.mViewRootImpl.cancelInvalidate(this); 11814 } else { 11815 // Should never happen 11816 clearDisplayList(); 11817 } 11818 11819 mCurrentAnimation = null; 11820 11821 resetRtlProperties(); 11822 onRtlPropertiesChanged(LAYOUT_DIRECTION_DEFAULT); 11823 resetAccessibilityStateChanged(); 11824 } 11825 11826 /** 11827 * @return The number of times this view has been attached to a window 11828 */ 11829 protected int getWindowAttachCount() { 11830 return mWindowAttachCount; 11831 } 11832 11833 /** 11834 * Retrieve a unique token identifying the window this view is attached to. 11835 * @return Return the window's token for use in 11836 * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. 11837 */ 11838 public IBinder getWindowToken() { 11839 return mAttachInfo != null ? mAttachInfo.mWindowToken : null; 11840 } 11841 11842 /** 11843 * Retrieve a unique token identifying the top-level "real" window of 11844 * the window that this view is attached to. That is, this is like 11845 * {@link #getWindowToken}, except if the window this view in is a panel 11846 * window (attached to another containing window), then the token of 11847 * the containing window is returned instead. 11848 * 11849 * @return Returns the associated window token, either 11850 * {@link #getWindowToken()} or the containing window's token. 11851 */ 11852 public IBinder getApplicationWindowToken() { 11853 AttachInfo ai = mAttachInfo; 11854 if (ai != null) { 11855 IBinder appWindowToken = ai.mPanelParentWindowToken; 11856 if (appWindowToken == null) { 11857 appWindowToken = ai.mWindowToken; 11858 } 11859 return appWindowToken; 11860 } 11861 return null; 11862 } 11863 11864 /** 11865 * Gets the logical display to which the view's window has been attached. 11866 * 11867 * @return The logical display, or null if the view is not currently attached to a window. 11868 */ 11869 public Display getDisplay() { 11870 return mAttachInfo != null ? mAttachInfo.mDisplay : null; 11871 } 11872 11873 /** 11874 * Retrieve private session object this view hierarchy is using to 11875 * communicate with the window manager. 11876 * @return the session object to communicate with the window manager 11877 */ 11878 /*package*/ IWindowSession getWindowSession() { 11879 return mAttachInfo != null ? mAttachInfo.mSession : null; 11880 } 11881 11882 /** 11883 * @param info the {@link android.view.View.AttachInfo} to associated with 11884 * this view 11885 */ 11886 void dispatchAttachedToWindow(AttachInfo info, int visibility) { 11887 //System.out.println("Attached! " + this); 11888 mAttachInfo = info; 11889 mWindowAttachCount++; 11890 // We will need to evaluate the drawable state at least once. 11891 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 11892 if (mFloatingTreeObserver != null) { 11893 info.mTreeObserver.merge(mFloatingTreeObserver); 11894 mFloatingTreeObserver = null; 11895 } 11896 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER) != 0) { 11897 mAttachInfo.mScrollContainers.add(this); 11898 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 11899 } 11900 performCollectViewAttributes(mAttachInfo, visibility); 11901 onAttachedToWindow(); 11902 11903 ListenerInfo li = mListenerInfo; 11904 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 11905 li != null ? li.mOnAttachStateChangeListeners : null; 11906 if (listeners != null && listeners.size() > 0) { 11907 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 11908 // perform the dispatching. The iterator is a safe guard against listeners that 11909 // could mutate the list by calling the various add/remove methods. This prevents 11910 // the array from being modified while we iterate it. 11911 for (OnAttachStateChangeListener listener : listeners) { 11912 listener.onViewAttachedToWindow(this); 11913 } 11914 } 11915 11916 int vis = info.mWindowVisibility; 11917 if (vis != GONE) { 11918 onWindowVisibilityChanged(vis); 11919 } 11920 if ((mPrivateFlags&PFLAG_DRAWABLE_STATE_DIRTY) != 0) { 11921 // If nobody has evaluated the drawable state yet, then do it now. 11922 refreshDrawableState(); 11923 } 11924 needGlobalAttributesUpdate(false); 11925 } 11926 11927 void dispatchDetachedFromWindow() { 11928 AttachInfo info = mAttachInfo; 11929 if (info != null) { 11930 int vis = info.mWindowVisibility; 11931 if (vis != GONE) { 11932 onWindowVisibilityChanged(GONE); 11933 } 11934 } 11935 11936 onDetachedFromWindow(); 11937 11938 ListenerInfo li = mListenerInfo; 11939 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 11940 li != null ? li.mOnAttachStateChangeListeners : null; 11941 if (listeners != null && listeners.size() > 0) { 11942 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 11943 // perform the dispatching. The iterator is a safe guard against listeners that 11944 // could mutate the list by calling the various add/remove methods. This prevents 11945 // the array from being modified while we iterate it. 11946 for (OnAttachStateChangeListener listener : listeners) { 11947 listener.onViewDetachedFromWindow(this); 11948 } 11949 } 11950 11951 if ((mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 11952 mAttachInfo.mScrollContainers.remove(this); 11953 mPrivateFlags &= ~PFLAG_SCROLL_CONTAINER_ADDED; 11954 } 11955 11956 mAttachInfo = null; 11957 } 11958 11959 /** 11960 * Store this view hierarchy's frozen state into the given container. 11961 * 11962 * @param container The SparseArray in which to save the view's state. 11963 * 11964 * @see #restoreHierarchyState(android.util.SparseArray) 11965 * @see #dispatchSaveInstanceState(android.util.SparseArray) 11966 * @see #onSaveInstanceState() 11967 */ 11968 public void saveHierarchyState(SparseArray<Parcelable> container) { 11969 dispatchSaveInstanceState(container); 11970 } 11971 11972 /** 11973 * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for 11974 * this view and its children. May be overridden to modify how freezing happens to a 11975 * view's children; for example, some views may want to not store state for their children. 11976 * 11977 * @param container The SparseArray in which to save the view's state. 11978 * 11979 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 11980 * @see #saveHierarchyState(android.util.SparseArray) 11981 * @see #onSaveInstanceState() 11982 */ 11983 protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { 11984 if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { 11985 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 11986 Parcelable state = onSaveInstanceState(); 11987 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 11988 throw new IllegalStateException( 11989 "Derived class did not call super.onSaveInstanceState()"); 11990 } 11991 if (state != null) { 11992 // Log.i("View", "Freezing #" + Integer.toHexString(mID) 11993 // + ": " + state); 11994 container.put(mID, state); 11995 } 11996 } 11997 } 11998 11999 /** 12000 * Hook allowing a view to generate a representation of its internal state 12001 * that can later be used to create a new instance with that same state. 12002 * This state should only contain information that is not persistent or can 12003 * not be reconstructed later. For example, you will never store your 12004 * current position on screen because that will be computed again when a 12005 * new instance of the view is placed in its view hierarchy. 12006 * <p> 12007 * Some examples of things you may store here: the current cursor position 12008 * in a text view (but usually not the text itself since that is stored in a 12009 * content provider or other persistent storage), the currently selected 12010 * item in a list view. 12011 * 12012 * @return Returns a Parcelable object containing the view's current dynamic 12013 * state, or null if there is nothing interesting to save. The 12014 * default implementation returns null. 12015 * @see #onRestoreInstanceState(android.os.Parcelable) 12016 * @see #saveHierarchyState(android.util.SparseArray) 12017 * @see #dispatchSaveInstanceState(android.util.SparseArray) 12018 * @see #setSaveEnabled(boolean) 12019 */ 12020 protected Parcelable onSaveInstanceState() { 12021 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 12022 return BaseSavedState.EMPTY_STATE; 12023 } 12024 12025 /** 12026 * Restore this view hierarchy's frozen state from the given container. 12027 * 12028 * @param container The SparseArray which holds previously frozen states. 12029 * 12030 * @see #saveHierarchyState(android.util.SparseArray) 12031 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 12032 * @see #onRestoreInstanceState(android.os.Parcelable) 12033 */ 12034 public void restoreHierarchyState(SparseArray<Parcelable> container) { 12035 dispatchRestoreInstanceState(container); 12036 } 12037 12038 /** 12039 * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the 12040 * state for this view and its children. May be overridden to modify how restoring 12041 * happens to a view's children; for example, some views may want to not store state 12042 * for their children. 12043 * 12044 * @param container The SparseArray which holds previously saved state. 12045 * 12046 * @see #dispatchSaveInstanceState(android.util.SparseArray) 12047 * @see #restoreHierarchyState(android.util.SparseArray) 12048 * @see #onRestoreInstanceState(android.os.Parcelable) 12049 */ 12050 protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { 12051 if (mID != NO_ID) { 12052 Parcelable state = container.get(mID); 12053 if (state != null) { 12054 // Log.i("View", "Restoreing #" + Integer.toHexString(mID) 12055 // + ": " + state); 12056 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 12057 onRestoreInstanceState(state); 12058 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 12059 throw new IllegalStateException( 12060 "Derived class did not call super.onRestoreInstanceState()"); 12061 } 12062 } 12063 } 12064 } 12065 12066 /** 12067 * Hook allowing a view to re-apply a representation of its internal state that had previously 12068 * been generated by {@link #onSaveInstanceState}. This function will never be called with a 12069 * null state. 12070 * 12071 * @param state The frozen state that had previously been returned by 12072 * {@link #onSaveInstanceState}. 12073 * 12074 * @see #onSaveInstanceState() 12075 * @see #restoreHierarchyState(android.util.SparseArray) 12076 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 12077 */ 12078 protected void onRestoreInstanceState(Parcelable state) { 12079 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 12080 if (state != BaseSavedState.EMPTY_STATE && state != null) { 12081 throw new IllegalArgumentException("Wrong state class, expecting View State but " 12082 + "received " + state.getClass().toString() + " instead. This usually happens " 12083 + "when two views of different type have the same id in the same hierarchy. " 12084 + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " 12085 + "other views do not use the same id."); 12086 } 12087 } 12088 12089 /** 12090 * <p>Return the time at which the drawing of the view hierarchy started.</p> 12091 * 12092 * @return the drawing start time in milliseconds 12093 */ 12094 public long getDrawingTime() { 12095 return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; 12096 } 12097 12098 /** 12099 * <p>Enables or disables the duplication of the parent's state into this view. When 12100 * duplication is enabled, this view gets its drawable state from its parent rather 12101 * than from its own internal properties.</p> 12102 * 12103 * <p>Note: in the current implementation, setting this property to true after the 12104 * view was added to a ViewGroup might have no effect at all. This property should 12105 * always be used from XML or set to true before adding this view to a ViewGroup.</p> 12106 * 12107 * <p>Note: if this view's parent addStateFromChildren property is enabled and this 12108 * property is enabled, an exception will be thrown.</p> 12109 * 12110 * <p>Note: if the child view uses and updates additionnal states which are unknown to the 12111 * parent, these states should not be affected by this method.</p> 12112 * 12113 * @param enabled True to enable duplication of the parent's drawable state, false 12114 * to disable it. 12115 * 12116 * @see #getDrawableState() 12117 * @see #isDuplicateParentStateEnabled() 12118 */ 12119 public void setDuplicateParentStateEnabled(boolean enabled) { 12120 setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); 12121 } 12122 12123 /** 12124 * <p>Indicates whether this duplicates its drawable state from its parent.</p> 12125 * 12126 * @return True if this view's drawable state is duplicated from the parent, 12127 * false otherwise 12128 * 12129 * @see #getDrawableState() 12130 * @see #setDuplicateParentStateEnabled(boolean) 12131 */ 12132 public boolean isDuplicateParentStateEnabled() { 12133 return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; 12134 } 12135 12136 /** 12137 * <p>Specifies the type of layer backing this view. The layer can be 12138 * {@link #LAYER_TYPE_NONE disabled}, {@link #LAYER_TYPE_SOFTWARE software} or 12139 * {@link #LAYER_TYPE_HARDWARE hardware}.</p> 12140 * 12141 * <p>A layer is associated with an optional {@link android.graphics.Paint} 12142 * instance that controls how the layer is composed on screen. The following 12143 * properties of the paint are taken into account when composing the layer:</p> 12144 * <ul> 12145 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 12146 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 12147 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 12148 * </ul> 12149 * 12150 * <p>If this view has an alpha value set to < 1.0 by calling 12151 * {@link #setAlpha(float)}, the alpha value of the layer's paint is replaced by 12152 * this view's alpha value. Calling {@link #setAlpha(float)} is therefore 12153 * equivalent to setting a hardware layer on this view and providing a paint with 12154 * the desired alpha value.</p> 12155 * 12156 * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE disabled}, 12157 * {@link #LAYER_TYPE_SOFTWARE software} and {@link #LAYER_TYPE_HARDWARE hardware} 12158 * for more information on when and how to use layers.</p> 12159 * 12160 * @param layerType The type of layer to use with this view, must be one of 12161 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 12162 * {@link #LAYER_TYPE_HARDWARE} 12163 * @param paint The paint used to compose the layer. This argument is optional 12164 * and can be null. It is ignored when the layer type is 12165 * {@link #LAYER_TYPE_NONE} 12166 * 12167 * @see #getLayerType() 12168 * @see #LAYER_TYPE_NONE 12169 * @see #LAYER_TYPE_SOFTWARE 12170 * @see #LAYER_TYPE_HARDWARE 12171 * @see #setAlpha(float) 12172 * 12173 * @attr ref android.R.styleable#View_layerType 12174 */ 12175 public void setLayerType(int layerType, Paint paint) { 12176 if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { 12177 throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " 12178 + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); 12179 } 12180 12181 if (layerType == mLayerType) { 12182 if (layerType != LAYER_TYPE_NONE && paint != mLayerPaint) { 12183 mLayerPaint = paint == null ? new Paint() : paint; 12184 invalidateParentCaches(); 12185 invalidate(true); 12186 } 12187 return; 12188 } 12189 12190 // Destroy any previous software drawing cache if needed 12191 switch (mLayerType) { 12192 case LAYER_TYPE_HARDWARE: 12193 destroyLayer(false); 12194 // fall through - non-accelerated views may use software layer mechanism instead 12195 case LAYER_TYPE_SOFTWARE: 12196 destroyDrawingCache(); 12197 break; 12198 default: 12199 break; 12200 } 12201 12202 mLayerType = layerType; 12203 final boolean layerDisabled = mLayerType == LAYER_TYPE_NONE; 12204 mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); 12205 mLocalDirtyRect = layerDisabled ? null : new Rect(); 12206 12207 invalidateParentCaches(); 12208 invalidate(true); 12209 } 12210 12211 /** 12212 * Updates the {@link Paint} object used with the current layer (used only if the current 12213 * layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint 12214 * provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time 12215 * the View is redrawn, but {@link #setLayerPaint(android.graphics.Paint)} must be called to 12216 * ensure that the view gets redrawn immediately. 12217 * 12218 * <p>A layer is associated with an optional {@link android.graphics.Paint} 12219 * instance that controls how the layer is composed on screen. The following 12220 * properties of the paint are taken into account when composing the layer:</p> 12221 * <ul> 12222 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 12223 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 12224 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 12225 * </ul> 12226 * 12227 * <p>If this view has an alpha value set to < 1.0 by calling 12228 * {@link #setAlpha(float)}, the alpha value of the layer's paint is replaced by 12229 * this view's alpha value. Calling {@link #setAlpha(float)} is therefore 12230 * equivalent to setting a hardware layer on this view and providing a paint with 12231 * the desired alpha value.</p> 12232 * 12233 * @param paint The paint used to compose the layer. This argument is optional 12234 * and can be null. It is ignored when the layer type is 12235 * {@link #LAYER_TYPE_NONE} 12236 * 12237 * @see #setLayerType(int, android.graphics.Paint) 12238 */ 12239 public void setLayerPaint(Paint paint) { 12240 int layerType = getLayerType(); 12241 if (layerType != LAYER_TYPE_NONE) { 12242 mLayerPaint = paint == null ? new Paint() : paint; 12243 if (layerType == LAYER_TYPE_HARDWARE) { 12244 HardwareLayer layer = getHardwareLayer(); 12245 if (layer != null) { 12246 layer.setLayerPaint(paint); 12247 } 12248 invalidateViewProperty(false, false); 12249 } else { 12250 invalidate(); 12251 } 12252 } 12253 } 12254 12255 /** 12256 * Indicates whether this view has a static layer. A view with layer type 12257 * {@link #LAYER_TYPE_NONE} is a static layer. Other types of layers are 12258 * dynamic. 12259 */ 12260 boolean hasStaticLayer() { 12261 return true; 12262 } 12263 12264 /** 12265 * Indicates what type of layer is currently associated with this view. By default 12266 * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. 12267 * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} 12268 * for more information on the different types of layers. 12269 * 12270 * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 12271 * {@link #LAYER_TYPE_HARDWARE} 12272 * 12273 * @see #setLayerType(int, android.graphics.Paint) 12274 * @see #buildLayer() 12275 * @see #LAYER_TYPE_NONE 12276 * @see #LAYER_TYPE_SOFTWARE 12277 * @see #LAYER_TYPE_HARDWARE 12278 */ 12279 public int getLayerType() { 12280 return mLayerType; 12281 } 12282 12283 /** 12284 * Forces this view's layer to be created and this view to be rendered 12285 * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, 12286 * invoking this method will have no effect. 12287 * 12288 * This method can for instance be used to render a view into its layer before 12289 * starting an animation. If this view is complex, rendering into the layer 12290 * before starting the animation will avoid skipping frames. 12291 * 12292 * @throws IllegalStateException If this view is not attached to a window 12293 * 12294 * @see #setLayerType(int, android.graphics.Paint) 12295 */ 12296 public void buildLayer() { 12297 if (mLayerType == LAYER_TYPE_NONE) return; 12298 12299 if (mAttachInfo == null) { 12300 throw new IllegalStateException("This view must be attached to a window first"); 12301 } 12302 12303 switch (mLayerType) { 12304 case LAYER_TYPE_HARDWARE: 12305 if (mAttachInfo.mHardwareRenderer != null && 12306 mAttachInfo.mHardwareRenderer.isEnabled() && 12307 mAttachInfo.mHardwareRenderer.validate()) { 12308 getHardwareLayer(); 12309 } 12310 break; 12311 case LAYER_TYPE_SOFTWARE: 12312 buildDrawingCache(true); 12313 break; 12314 } 12315 } 12316 12317 /** 12318 * <p>Returns a hardware layer that can be used to draw this view again 12319 * without executing its draw method.</p> 12320 * 12321 * @return A HardwareLayer ready to render, or null if an error occurred. 12322 */ 12323 HardwareLayer getHardwareLayer() { 12324 if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null || 12325 !mAttachInfo.mHardwareRenderer.isEnabled()) { 12326 return null; 12327 } 12328 12329 if (!mAttachInfo.mHardwareRenderer.validate()) return null; 12330 12331 final int width = mRight - mLeft; 12332 final int height = mBottom - mTop; 12333 12334 if (width == 0 || height == 0) { 12335 return null; 12336 } 12337 12338 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || mHardwareLayer == null) { 12339 if (mHardwareLayer == null) { 12340 mHardwareLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer( 12341 width, height, isOpaque()); 12342 mLocalDirtyRect.set(0, 0, width, height); 12343 } else { 12344 if (mHardwareLayer.getWidth() != width || mHardwareLayer.getHeight() != height) { 12345 if (mHardwareLayer.resize(width, height)) { 12346 mLocalDirtyRect.set(0, 0, width, height); 12347 } 12348 } 12349 12350 // This should not be necessary but applications that change 12351 // the parameters of their background drawable without calling 12352 // this.setBackground(Drawable) can leave the view in a bad state 12353 // (for instance isOpaque() returns true, but the background is 12354 // not opaque.) 12355 computeOpaqueFlags(); 12356 12357 final boolean opaque = isOpaque(); 12358 if (mHardwareLayer.isValid() && mHardwareLayer.isOpaque() != opaque) { 12359 mHardwareLayer.setOpaque(opaque); 12360 mLocalDirtyRect.set(0, 0, width, height); 12361 } 12362 } 12363 12364 // The layer is not valid if the underlying GPU resources cannot be allocated 12365 if (!mHardwareLayer.isValid()) { 12366 return null; 12367 } 12368 12369 mHardwareLayer.setLayerPaint(mLayerPaint); 12370 mHardwareLayer.redrawLater(getHardwareLayerDisplayList(mHardwareLayer), mLocalDirtyRect); 12371 ViewRootImpl viewRoot = getViewRootImpl(); 12372 if (viewRoot != null) viewRoot.pushHardwareLayerUpdate(mHardwareLayer); 12373 12374 mLocalDirtyRect.setEmpty(); 12375 } 12376 12377 return mHardwareLayer; 12378 } 12379 12380 /** 12381 * Destroys this View's hardware layer if possible. 12382 * 12383 * @return True if the layer was destroyed, false otherwise. 12384 * 12385 * @see #setLayerType(int, android.graphics.Paint) 12386 * @see #LAYER_TYPE_HARDWARE 12387 */ 12388 boolean destroyLayer(boolean valid) { 12389 if (mHardwareLayer != null) { 12390 AttachInfo info = mAttachInfo; 12391 if (info != null && info.mHardwareRenderer != null && 12392 info.mHardwareRenderer.isEnabled() && 12393 (valid || info.mHardwareRenderer.validate())) { 12394 mHardwareLayer.destroy(); 12395 mHardwareLayer = null; 12396 12397 invalidate(true); 12398 invalidateParentCaches(); 12399 } 12400 return true; 12401 } 12402 return false; 12403 } 12404 12405 /** 12406 * Destroys all hardware rendering resources. This method is invoked 12407 * when the system needs to reclaim resources. Upon execution of this 12408 * method, you should free any OpenGL resources created by the view. 12409 * 12410 * Note: you <strong>must</strong> call 12411 * <code>super.destroyHardwareResources()</code> when overriding 12412 * this method. 12413 * 12414 * @hide 12415 */ 12416 protected void destroyHardwareResources() { 12417 destroyLayer(true); 12418 } 12419 12420 /** 12421 * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call 12422 * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a 12423 * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when 12424 * the cache is enabled. To benefit from the cache, you must request the drawing cache by 12425 * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not 12426 * null.</p> 12427 * 12428 * <p>Enabling the drawing cache is similar to 12429 * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware 12430 * acceleration is turned off. When hardware acceleration is turned on, enabling the 12431 * drawing cache has no effect on rendering because the system uses a different mechanism 12432 * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even 12433 * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} 12434 * for information on how to enable software and hardware layers.</p> 12435 * 12436 * <p>This API can be used to manually generate 12437 * a bitmap copy of this view, by setting the flag to <code>true</code> and calling 12438 * {@link #getDrawingCache()}.</p> 12439 * 12440 * @param enabled true to enable the drawing cache, false otherwise 12441 * 12442 * @see #isDrawingCacheEnabled() 12443 * @see #getDrawingCache() 12444 * @see #buildDrawingCache() 12445 * @see #setLayerType(int, android.graphics.Paint) 12446 */ 12447 public void setDrawingCacheEnabled(boolean enabled) { 12448 mCachingFailed = false; 12449 setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); 12450 } 12451 12452 /** 12453 * <p>Indicates whether the drawing cache is enabled for this view.</p> 12454 * 12455 * @return true if the drawing cache is enabled 12456 * 12457 * @see #setDrawingCacheEnabled(boolean) 12458 * @see #getDrawingCache() 12459 */ 12460 @ViewDebug.ExportedProperty(category = "drawing") 12461 public boolean isDrawingCacheEnabled() { 12462 return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; 12463 } 12464 12465 /** 12466 * Debugging utility which recursively outputs the dirty state of a view and its 12467 * descendants. 12468 * 12469 * @hide 12470 */ 12471 @SuppressWarnings({"UnusedDeclaration"}) 12472 public void outputDirtyFlags(String indent, boolean clear, int clearMask) { 12473 Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.PFLAG_DIRTY_MASK) + 12474 ") DRAWN(" + (mPrivateFlags & PFLAG_DRAWN) + ")" + " CACHE_VALID(" + 12475 (mPrivateFlags & View.PFLAG_DRAWING_CACHE_VALID) + 12476 ") INVALIDATED(" + (mPrivateFlags & PFLAG_INVALIDATED) + ")"); 12477 if (clear) { 12478 mPrivateFlags &= clearMask; 12479 } 12480 if (this instanceof ViewGroup) { 12481 ViewGroup parent = (ViewGroup) this; 12482 final int count = parent.getChildCount(); 12483 for (int i = 0; i < count; i++) { 12484 final View child = parent.getChildAt(i); 12485 child.outputDirtyFlags(indent + " ", clear, clearMask); 12486 } 12487 } 12488 } 12489 12490 /** 12491 * This method is used by ViewGroup to cause its children to restore or recreate their 12492 * display lists. It is called by getDisplayList() when the parent ViewGroup does not need 12493 * to recreate its own display list, which would happen if it went through the normal 12494 * draw/dispatchDraw mechanisms. 12495 * 12496 * @hide 12497 */ 12498 protected void dispatchGetDisplayList() {} 12499 12500 /** 12501 * A view that is not attached or hardware accelerated cannot create a display list. 12502 * This method checks these conditions and returns the appropriate result. 12503 * 12504 * @return true if view has the ability to create a display list, false otherwise. 12505 * 12506 * @hide 12507 */ 12508 public boolean canHaveDisplayList() { 12509 return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); 12510 } 12511 12512 /** 12513 * @return The HardwareRenderer associated with that view or null if hardware rendering 12514 * is not supported or this this has not been attached to a window. 12515 * 12516 * @hide 12517 */ 12518 public HardwareRenderer getHardwareRenderer() { 12519 if (mAttachInfo != null) { 12520 return mAttachInfo.mHardwareRenderer; 12521 } 12522 return null; 12523 } 12524 12525 /** 12526 * Returns a DisplayList. If the incoming displayList is null, one will be created. 12527 * Otherwise, the same display list will be returned (after having been rendered into 12528 * along the way, depending on the invalidation state of the view). 12529 * 12530 * @param displayList The previous version of this displayList, could be null. 12531 * @param isLayer Whether the requester of the display list is a layer. If so, 12532 * the view will avoid creating a layer inside the resulting display list. 12533 * @return A new or reused DisplayList object. 12534 */ 12535 private DisplayList getDisplayList(DisplayList displayList, boolean isLayer) { 12536 if (!canHaveDisplayList()) { 12537 return null; 12538 } 12539 12540 if (((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || 12541 displayList == null || !displayList.isValid() || 12542 (!isLayer && mRecreateDisplayList))) { 12543 // Don't need to recreate the display list, just need to tell our 12544 // children to restore/recreate theirs 12545 if (displayList != null && displayList.isValid() && 12546 !isLayer && !mRecreateDisplayList) { 12547 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 12548 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 12549 dispatchGetDisplayList(); 12550 12551 return displayList; 12552 } 12553 12554 if (!isLayer) { 12555 // If we got here, we're recreating it. Mark it as such to ensure that 12556 // we copy in child display lists into ours in drawChild() 12557 mRecreateDisplayList = true; 12558 } 12559 if (displayList == null) { 12560 final String name = getClass().getSimpleName(); 12561 displayList = mAttachInfo.mHardwareRenderer.createDisplayList(name); 12562 // If we're creating a new display list, make sure our parent gets invalidated 12563 // since they will need to recreate their display list to account for this 12564 // new child display list. 12565 invalidateParentCaches(); 12566 } 12567 12568 boolean caching = false; 12569 final HardwareCanvas canvas = displayList.start(); 12570 int width = mRight - mLeft; 12571 int height = mBottom - mTop; 12572 12573 try { 12574 canvas.setViewport(width, height); 12575 // The dirty rect should always be null for a display list 12576 canvas.onPreDraw(null); 12577 int layerType = getLayerType(); 12578 if (!isLayer && layerType != LAYER_TYPE_NONE) { 12579 if (layerType == LAYER_TYPE_HARDWARE) { 12580 final HardwareLayer layer = getHardwareLayer(); 12581 if (layer != null && layer.isValid()) { 12582 canvas.drawHardwareLayer(layer, 0, 0, mLayerPaint); 12583 } else { 12584 canvas.saveLayer(0, 0, mRight - mLeft, mBottom - mTop, mLayerPaint, 12585 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | 12586 Canvas.CLIP_TO_LAYER_SAVE_FLAG); 12587 } 12588 caching = true; 12589 } else { 12590 buildDrawingCache(true); 12591 Bitmap cache = getDrawingCache(true); 12592 if (cache != null) { 12593 canvas.drawBitmap(cache, 0, 0, mLayerPaint); 12594 caching = true; 12595 } 12596 } 12597 } else { 12598 12599 computeScroll(); 12600 12601 canvas.translate(-mScrollX, -mScrollY); 12602 if (!isLayer) { 12603 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 12604 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 12605 } 12606 12607 // Fast path for layouts with no backgrounds 12608 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 12609 dispatchDraw(canvas); 12610 } else { 12611 draw(canvas); 12612 } 12613 } 12614 } finally { 12615 canvas.onPostDraw(); 12616 12617 displayList.end(); 12618 displayList.setCaching(caching); 12619 if (isLayer) { 12620 displayList.setLeftTopRightBottom(0, 0, width, height); 12621 } else { 12622 setDisplayListProperties(displayList); 12623 } 12624 } 12625 } else if (!isLayer) { 12626 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 12627 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 12628 } 12629 12630 return displayList; 12631 } 12632 12633 /** 12634 * Get the DisplayList for the HardwareLayer 12635 * 12636 * @param layer The HardwareLayer whose DisplayList we want 12637 * @return A DisplayList fopr the specified HardwareLayer 12638 */ 12639 private DisplayList getHardwareLayerDisplayList(HardwareLayer layer) { 12640 DisplayList displayList = getDisplayList(layer.getDisplayList(), true); 12641 layer.setDisplayList(displayList); 12642 return displayList; 12643 } 12644 12645 12646 /** 12647 * <p>Returns a display list that can be used to draw this view again 12648 * without executing its draw method.</p> 12649 * 12650 * @return A DisplayList ready to replay, or null if caching is not enabled. 12651 * 12652 * @hide 12653 */ 12654 public DisplayList getDisplayList() { 12655 mDisplayList = getDisplayList(mDisplayList, false); 12656 return mDisplayList; 12657 } 12658 12659 private void clearDisplayList() { 12660 if (mDisplayList != null) { 12661 mDisplayList.invalidate(); 12662 mDisplayList.clear(); 12663 } 12664 } 12665 12666 /** 12667 * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> 12668 * 12669 * @return A non-scaled bitmap representing this view or null if cache is disabled. 12670 * 12671 * @see #getDrawingCache(boolean) 12672 */ 12673 public Bitmap getDrawingCache() { 12674 return getDrawingCache(false); 12675 } 12676 12677 /** 12678 * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap 12679 * is null when caching is disabled. If caching is enabled and the cache is not ready, 12680 * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not 12681 * draw from the cache when the cache is enabled. To benefit from the cache, you must 12682 * request the drawing cache by calling this method and draw it on screen if the 12683 * returned bitmap is not null.</p> 12684 * 12685 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 12686 * this method will create a bitmap of the same size as this view. Because this bitmap 12687 * will be drawn scaled by the parent ViewGroup, the result on screen might show 12688 * scaling artifacts. To avoid such artifacts, you should call this method by setting 12689 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 12690 * size than the view. This implies that your application must be able to handle this 12691 * size.</p> 12692 * 12693 * @param autoScale Indicates whether the generated bitmap should be scaled based on 12694 * the current density of the screen when the application is in compatibility 12695 * mode. 12696 * 12697 * @return A bitmap representing this view or null if cache is disabled. 12698 * 12699 * @see #setDrawingCacheEnabled(boolean) 12700 * @see #isDrawingCacheEnabled() 12701 * @see #buildDrawingCache(boolean) 12702 * @see #destroyDrawingCache() 12703 */ 12704 public Bitmap getDrawingCache(boolean autoScale) { 12705 if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { 12706 return null; 12707 } 12708 if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { 12709 buildDrawingCache(autoScale); 12710 } 12711 return autoScale ? mDrawingCache : mUnscaledDrawingCache; 12712 } 12713 12714 /** 12715 * <p>Frees the resources used by the drawing cache. If you call 12716 * {@link #buildDrawingCache()} manually without calling 12717 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 12718 * should cleanup the cache with this method afterwards.</p> 12719 * 12720 * @see #setDrawingCacheEnabled(boolean) 12721 * @see #buildDrawingCache() 12722 * @see #getDrawingCache() 12723 */ 12724 public void destroyDrawingCache() { 12725 if (mDrawingCache != null) { 12726 mDrawingCache.recycle(); 12727 mDrawingCache = null; 12728 } 12729 if (mUnscaledDrawingCache != null) { 12730 mUnscaledDrawingCache.recycle(); 12731 mUnscaledDrawingCache = null; 12732 } 12733 } 12734 12735 /** 12736 * Setting a solid background color for the drawing cache's bitmaps will improve 12737 * performance and memory usage. Note, though that this should only be used if this 12738 * view will always be drawn on top of a solid color. 12739 * 12740 * @param color The background color to use for the drawing cache's bitmap 12741 * 12742 * @see #setDrawingCacheEnabled(boolean) 12743 * @see #buildDrawingCache() 12744 * @see #getDrawingCache() 12745 */ 12746 public void setDrawingCacheBackgroundColor(int color) { 12747 if (color != mDrawingCacheBackgroundColor) { 12748 mDrawingCacheBackgroundColor = color; 12749 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 12750 } 12751 } 12752 12753 /** 12754 * @see #setDrawingCacheBackgroundColor(int) 12755 * 12756 * @return The background color to used for the drawing cache's bitmap 12757 */ 12758 public int getDrawingCacheBackgroundColor() { 12759 return mDrawingCacheBackgroundColor; 12760 } 12761 12762 /** 12763 * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> 12764 * 12765 * @see #buildDrawingCache(boolean) 12766 */ 12767 public void buildDrawingCache() { 12768 buildDrawingCache(false); 12769 } 12770 12771 /** 12772 * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> 12773 * 12774 * <p>If you call {@link #buildDrawingCache()} manually without calling 12775 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 12776 * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> 12777 * 12778 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 12779 * this method will create a bitmap of the same size as this view. Because this bitmap 12780 * will be drawn scaled by the parent ViewGroup, the result on screen might show 12781 * scaling artifacts. To avoid such artifacts, you should call this method by setting 12782 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 12783 * size than the view. This implies that your application must be able to handle this 12784 * size.</p> 12785 * 12786 * <p>You should avoid calling this method when hardware acceleration is enabled. If 12787 * you do not need the drawing cache bitmap, calling this method will increase memory 12788 * usage and cause the view to be rendered in software once, thus negatively impacting 12789 * performance.</p> 12790 * 12791 * @see #getDrawingCache() 12792 * @see #destroyDrawingCache() 12793 */ 12794 public void buildDrawingCache(boolean autoScale) { 12795 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || (autoScale ? 12796 mDrawingCache == null : mUnscaledDrawingCache == null)) { 12797 mCachingFailed = false; 12798 12799 int width = mRight - mLeft; 12800 int height = mBottom - mTop; 12801 12802 final AttachInfo attachInfo = mAttachInfo; 12803 final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; 12804 12805 if (autoScale && scalingRequired) { 12806 width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); 12807 height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); 12808 } 12809 12810 final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; 12811 final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); 12812 final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; 12813 12814 final long projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4); 12815 final long drawingCacheSize = 12816 ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize(); 12817 if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) { 12818 if (width > 0 && height > 0) { 12819 Log.w(VIEW_LOG_TAG, "View too large to fit into drawing cache, needs " 12820 + projectedBitmapSize + " bytes, only " 12821 + drawingCacheSize + " available"); 12822 } 12823 destroyDrawingCache(); 12824 mCachingFailed = true; 12825 return; 12826 } 12827 12828 boolean clear = true; 12829 Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; 12830 12831 if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { 12832 Bitmap.Config quality; 12833 if (!opaque) { 12834 // Never pick ARGB_4444 because it looks awful 12835 // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case 12836 switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { 12837 case DRAWING_CACHE_QUALITY_AUTO: 12838 quality = Bitmap.Config.ARGB_8888; 12839 break; 12840 case DRAWING_CACHE_QUALITY_LOW: 12841 quality = Bitmap.Config.ARGB_8888; 12842 break; 12843 case DRAWING_CACHE_QUALITY_HIGH: 12844 quality = Bitmap.Config.ARGB_8888; 12845 break; 12846 default: 12847 quality = Bitmap.Config.ARGB_8888; 12848 break; 12849 } 12850 } else { 12851 // Optimization for translucent windows 12852 // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() 12853 quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 12854 } 12855 12856 // Try to cleanup memory 12857 if (bitmap != null) bitmap.recycle(); 12858 12859 try { 12860 bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 12861 width, height, quality); 12862 bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); 12863 if (autoScale) { 12864 mDrawingCache = bitmap; 12865 } else { 12866 mUnscaledDrawingCache = bitmap; 12867 } 12868 if (opaque && use32BitCache) bitmap.setHasAlpha(false); 12869 } catch (OutOfMemoryError e) { 12870 // If there is not enough memory to create the bitmap cache, just 12871 // ignore the issue as bitmap caches are not required to draw the 12872 // view hierarchy 12873 if (autoScale) { 12874 mDrawingCache = null; 12875 } else { 12876 mUnscaledDrawingCache = null; 12877 } 12878 mCachingFailed = true; 12879 return; 12880 } 12881 12882 clear = drawingCacheBackgroundColor != 0; 12883 } 12884 12885 Canvas canvas; 12886 if (attachInfo != null) { 12887 canvas = attachInfo.mCanvas; 12888 if (canvas == null) { 12889 canvas = new Canvas(); 12890 } 12891 canvas.setBitmap(bitmap); 12892 // Temporarily clobber the cached Canvas in case one of our children 12893 // is also using a drawing cache. Without this, the children would 12894 // steal the canvas by attaching their own bitmap to it and bad, bad 12895 // thing would happen (invisible views, corrupted drawings, etc.) 12896 attachInfo.mCanvas = null; 12897 } else { 12898 // This case should hopefully never or seldom happen 12899 canvas = new Canvas(bitmap); 12900 } 12901 12902 if (clear) { 12903 bitmap.eraseColor(drawingCacheBackgroundColor); 12904 } 12905 12906 computeScroll(); 12907 final int restoreCount = canvas.save(); 12908 12909 if (autoScale && scalingRequired) { 12910 final float scale = attachInfo.mApplicationScale; 12911 canvas.scale(scale, scale); 12912 } 12913 12914 canvas.translate(-mScrollX, -mScrollY); 12915 12916 mPrivateFlags |= PFLAG_DRAWN; 12917 if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || 12918 mLayerType != LAYER_TYPE_NONE) { 12919 mPrivateFlags |= PFLAG_DRAWING_CACHE_VALID; 12920 } 12921 12922 // Fast path for layouts with no backgrounds 12923 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 12924 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 12925 dispatchDraw(canvas); 12926 } else { 12927 draw(canvas); 12928 } 12929 12930 canvas.restoreToCount(restoreCount); 12931 canvas.setBitmap(null); 12932 12933 if (attachInfo != null) { 12934 // Restore the cached Canvas for our siblings 12935 attachInfo.mCanvas = canvas; 12936 } 12937 } 12938 } 12939 12940 /** 12941 * Create a snapshot of the view into a bitmap. We should probably make 12942 * some form of this public, but should think about the API. 12943 */ 12944 Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { 12945 int width = mRight - mLeft; 12946 int height = mBottom - mTop; 12947 12948 final AttachInfo attachInfo = mAttachInfo; 12949 final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; 12950 width = (int) ((width * scale) + 0.5f); 12951 height = (int) ((height * scale) + 0.5f); 12952 12953 Bitmap bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 12954 width > 0 ? width : 1, height > 0 ? height : 1, quality); 12955 if (bitmap == null) { 12956 throw new OutOfMemoryError(); 12957 } 12958 12959 Resources resources = getResources(); 12960 if (resources != null) { 12961 bitmap.setDensity(resources.getDisplayMetrics().densityDpi); 12962 } 12963 12964 Canvas canvas; 12965 if (attachInfo != null) { 12966 canvas = attachInfo.mCanvas; 12967 if (canvas == null) { 12968 canvas = new Canvas(); 12969 } 12970 canvas.setBitmap(bitmap); 12971 // Temporarily clobber the cached Canvas in case one of our children 12972 // is also using a drawing cache. Without this, the children would 12973 // steal the canvas by attaching their own bitmap to it and bad, bad 12974 // things would happen (invisible views, corrupted drawings, etc.) 12975 attachInfo.mCanvas = null; 12976 } else { 12977 // This case should hopefully never or seldom happen 12978 canvas = new Canvas(bitmap); 12979 } 12980 12981 if ((backgroundColor & 0xff000000) != 0) { 12982 bitmap.eraseColor(backgroundColor); 12983 } 12984 12985 computeScroll(); 12986 final int restoreCount = canvas.save(); 12987 canvas.scale(scale, scale); 12988 canvas.translate(-mScrollX, -mScrollY); 12989 12990 // Temporarily remove the dirty mask 12991 int flags = mPrivateFlags; 12992 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 12993 12994 // Fast path for layouts with no backgrounds 12995 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 12996 dispatchDraw(canvas); 12997 } else { 12998 draw(canvas); 12999 } 13000 13001 mPrivateFlags = flags; 13002 13003 canvas.restoreToCount(restoreCount); 13004 canvas.setBitmap(null); 13005 13006 if (attachInfo != null) { 13007 // Restore the cached Canvas for our siblings 13008 attachInfo.mCanvas = canvas; 13009 } 13010 13011 return bitmap; 13012 } 13013 13014 /** 13015 * Indicates whether this View is currently in edit mode. A View is usually 13016 * in edit mode when displayed within a developer tool. For instance, if 13017 * this View is being drawn by a visual user interface builder, this method 13018 * should return true. 13019 * 13020 * Subclasses should check the return value of this method to provide 13021 * different behaviors if their normal behavior might interfere with the 13022 * host environment. For instance: the class spawns a thread in its 13023 * constructor, the drawing code relies on device-specific features, etc. 13024 * 13025 * This method is usually checked in the drawing code of custom widgets. 13026 * 13027 * @return True if this View is in edit mode, false otherwise. 13028 */ 13029 public boolean isInEditMode() { 13030 return false; 13031 } 13032 13033 /** 13034 * If the View draws content inside its padding and enables fading edges, 13035 * it needs to support padding offsets. Padding offsets are added to the 13036 * fading edges to extend the length of the fade so that it covers pixels 13037 * drawn inside the padding. 13038 * 13039 * Subclasses of this class should override this method if they need 13040 * to draw content inside the padding. 13041 * 13042 * @return True if padding offset must be applied, false otherwise. 13043 * 13044 * @see #getLeftPaddingOffset() 13045 * @see #getRightPaddingOffset() 13046 * @see #getTopPaddingOffset() 13047 * @see #getBottomPaddingOffset() 13048 * 13049 * @since CURRENT 13050 */ 13051 protected boolean isPaddingOffsetRequired() { 13052 return false; 13053 } 13054 13055 /** 13056 * Amount by which to extend the left fading region. Called only when 13057 * {@link #isPaddingOffsetRequired()} returns true. 13058 * 13059 * @return The left padding offset in pixels. 13060 * 13061 * @see #isPaddingOffsetRequired() 13062 * 13063 * @since CURRENT 13064 */ 13065 protected int getLeftPaddingOffset() { 13066 return 0; 13067 } 13068 13069 /** 13070 * Amount by which to extend the right fading region. Called only when 13071 * {@link #isPaddingOffsetRequired()} returns true. 13072 * 13073 * @return The right padding offset in pixels. 13074 * 13075 * @see #isPaddingOffsetRequired() 13076 * 13077 * @since CURRENT 13078 */ 13079 protected int getRightPaddingOffset() { 13080 return 0; 13081 } 13082 13083 /** 13084 * Amount by which to extend the top fading region. Called only when 13085 * {@link #isPaddingOffsetRequired()} returns true. 13086 * 13087 * @return The top padding offset in pixels. 13088 * 13089 * @see #isPaddingOffsetRequired() 13090 * 13091 * @since CURRENT 13092 */ 13093 protected int getTopPaddingOffset() { 13094 return 0; 13095 } 13096 13097 /** 13098 * Amount by which to extend the bottom fading region. Called only when 13099 * {@link #isPaddingOffsetRequired()} returns true. 13100 * 13101 * @return The bottom padding offset in pixels. 13102 * 13103 * @see #isPaddingOffsetRequired() 13104 * 13105 * @since CURRENT 13106 */ 13107 protected int getBottomPaddingOffset() { 13108 return 0; 13109 } 13110 13111 /** 13112 * @hide 13113 * @param offsetRequired 13114 */ 13115 protected int getFadeTop(boolean offsetRequired) { 13116 int top = mPaddingTop; 13117 if (offsetRequired) top += getTopPaddingOffset(); 13118 return top; 13119 } 13120 13121 /** 13122 * @hide 13123 * @param offsetRequired 13124 */ 13125 protected int getFadeHeight(boolean offsetRequired) { 13126 int padding = mPaddingTop; 13127 if (offsetRequired) padding += getTopPaddingOffset(); 13128 return mBottom - mTop - mPaddingBottom - padding; 13129 } 13130 13131 /** 13132 * <p>Indicates whether this view is attached to a hardware accelerated 13133 * window or not.</p> 13134 * 13135 * <p>Even if this method returns true, it does not mean that every call 13136 * to {@link #draw(android.graphics.Canvas)} will be made with an hardware 13137 * accelerated {@link android.graphics.Canvas}. For instance, if this view 13138 * is drawn onto an offscreen {@link android.graphics.Bitmap} and its 13139 * window is hardware accelerated, 13140 * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely 13141 * return false, and this method will return true.</p> 13142 * 13143 * @return True if the view is attached to a window and the window is 13144 * hardware accelerated; false in any other case. 13145 */ 13146 public boolean isHardwareAccelerated() { 13147 return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 13148 } 13149 13150 /** 13151 * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common 13152 * case of an active Animation being run on the view. 13153 */ 13154 private boolean drawAnimation(ViewGroup parent, long drawingTime, 13155 Animation a, boolean scalingRequired) { 13156 Transformation invalidationTransform; 13157 final int flags = parent.mGroupFlags; 13158 final boolean initialized = a.isInitialized(); 13159 if (!initialized) { 13160 a.initialize(mRight - mLeft, mBottom - mTop, parent.getWidth(), parent.getHeight()); 13161 a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); 13162 if (mAttachInfo != null) a.setListenerHandler(mAttachInfo.mHandler); 13163 onAnimationStart(); 13164 } 13165 13166 boolean more = a.getTransformation(drawingTime, parent.mChildTransformation, 1f); 13167 if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { 13168 if (parent.mInvalidationTransformation == null) { 13169 parent.mInvalidationTransformation = new Transformation(); 13170 } 13171 invalidationTransform = parent.mInvalidationTransformation; 13172 a.getTransformation(drawingTime, invalidationTransform, 1f); 13173 } else { 13174 invalidationTransform = parent.mChildTransformation; 13175 } 13176 13177 if (more) { 13178 if (!a.willChangeBounds()) { 13179 if ((flags & (ViewGroup.FLAG_OPTIMIZE_INVALIDATE | ViewGroup.FLAG_ANIMATION_DONE)) == 13180 ViewGroup.FLAG_OPTIMIZE_INVALIDATE) { 13181 parent.mGroupFlags |= ViewGroup.FLAG_INVALIDATE_REQUIRED; 13182 } else if ((flags & ViewGroup.FLAG_INVALIDATE_REQUIRED) == 0) { 13183 // The child need to draw an animation, potentially offscreen, so 13184 // make sure we do not cancel invalidate requests 13185 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 13186 parent.invalidate(mLeft, mTop, mRight, mBottom); 13187 } 13188 } else { 13189 if (parent.mInvalidateRegion == null) { 13190 parent.mInvalidateRegion = new RectF(); 13191 } 13192 final RectF region = parent.mInvalidateRegion; 13193 a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, 13194 invalidationTransform); 13195 13196 // The child need to draw an animation, potentially offscreen, so 13197 // make sure we do not cancel invalidate requests 13198 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 13199 13200 final int left = mLeft + (int) region.left; 13201 final int top = mTop + (int) region.top; 13202 parent.invalidate(left, top, left + (int) (region.width() + .5f), 13203 top + (int) (region.height() + .5f)); 13204 } 13205 } 13206 return more; 13207 } 13208 13209 /** 13210 * This method is called by getDisplayList() when a display list is created or re-rendered. 13211 * It sets or resets the current value of all properties on that display list (resetting is 13212 * necessary when a display list is being re-created, because we need to make sure that 13213 * previously-set transform values 13214 */ 13215 void setDisplayListProperties(DisplayList displayList) { 13216 if (displayList != null) { 13217 displayList.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 13218 displayList.setHasOverlappingRendering(hasOverlappingRendering()); 13219 if (mParent instanceof ViewGroup) { 13220 displayList.setClipChildren( 13221 (((ViewGroup)mParent).mGroupFlags & ViewGroup.FLAG_CLIP_CHILDREN) != 0); 13222 } 13223 float alpha = 1; 13224 if (mParent instanceof ViewGroup && (((ViewGroup) mParent).mGroupFlags & 13225 ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 13226 ViewGroup parentVG = (ViewGroup) mParent; 13227 final boolean hasTransform = 13228 parentVG.getChildStaticTransformation(this, parentVG.mChildTransformation); 13229 if (hasTransform) { 13230 Transformation transform = parentVG.mChildTransformation; 13231 final int transformType = parentVG.mChildTransformation.getTransformationType(); 13232 if (transformType != Transformation.TYPE_IDENTITY) { 13233 if ((transformType & Transformation.TYPE_ALPHA) != 0) { 13234 alpha = transform.getAlpha(); 13235 } 13236 if ((transformType & Transformation.TYPE_MATRIX) != 0) { 13237 displayList.setStaticMatrix(transform.getMatrix()); 13238 } 13239 } 13240 } 13241 } 13242 if (mTransformationInfo != null) { 13243 alpha *= mTransformationInfo.mAlpha; 13244 if (alpha < 1) { 13245 final int multipliedAlpha = (int) (255 * alpha); 13246 if (onSetAlpha(multipliedAlpha)) { 13247 alpha = 1; 13248 } 13249 } 13250 displayList.setTransformationInfo(alpha, 13251 mTransformationInfo.mTranslationX, mTransformationInfo.mTranslationY, 13252 mTransformationInfo.mRotation, mTransformationInfo.mRotationX, 13253 mTransformationInfo.mRotationY, mTransformationInfo.mScaleX, 13254 mTransformationInfo.mScaleY); 13255 if (mTransformationInfo.mCamera == null) { 13256 mTransformationInfo.mCamera = new Camera(); 13257 mTransformationInfo.matrix3D = new Matrix(); 13258 } 13259 displayList.setCameraDistance(mTransformationInfo.mCamera.getLocationZ()); 13260 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == PFLAG_PIVOT_EXPLICITLY_SET) { 13261 displayList.setPivotX(getPivotX()); 13262 displayList.setPivotY(getPivotY()); 13263 } 13264 } else if (alpha < 1) { 13265 displayList.setAlpha(alpha); 13266 } 13267 } 13268 } 13269 13270 /** 13271 * This method is called by ViewGroup.drawChild() to have each child view draw itself. 13272 * This draw() method is an implementation detail and is not intended to be overridden or 13273 * to be called from anywhere else other than ViewGroup.drawChild(). 13274 */ 13275 boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { 13276 boolean useDisplayListProperties = mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 13277 boolean more = false; 13278 final boolean childHasIdentityMatrix = hasIdentityMatrix(); 13279 final int flags = parent.mGroupFlags; 13280 13281 if ((flags & ViewGroup.FLAG_CLEAR_TRANSFORMATION) == ViewGroup.FLAG_CLEAR_TRANSFORMATION) { 13282 parent.mChildTransformation.clear(); 13283 parent.mGroupFlags &= ~ViewGroup.FLAG_CLEAR_TRANSFORMATION; 13284 } 13285 13286 Transformation transformToApply = null; 13287 boolean concatMatrix = false; 13288 13289 boolean scalingRequired = false; 13290 boolean caching; 13291 int layerType = getLayerType(); 13292 13293 final boolean hardwareAccelerated = canvas.isHardwareAccelerated(); 13294 if ((flags & ViewGroup.FLAG_CHILDREN_DRAWN_WITH_CACHE) != 0 || 13295 (flags & ViewGroup.FLAG_ALWAYS_DRAWN_WITH_CACHE) != 0) { 13296 caching = true; 13297 // Auto-scaled apps are not hw-accelerated, no need to set scaling flag on DisplayList 13298 if (mAttachInfo != null) scalingRequired = mAttachInfo.mScalingRequired; 13299 } else { 13300 caching = (layerType != LAYER_TYPE_NONE) || hardwareAccelerated; 13301 } 13302 13303 final Animation a = getAnimation(); 13304 if (a != null) { 13305 more = drawAnimation(parent, drawingTime, a, scalingRequired); 13306 concatMatrix = a.willChangeTransformationMatrix(); 13307 if (concatMatrix) { 13308 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 13309 } 13310 transformToApply = parent.mChildTransformation; 13311 } else { 13312 if ((mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_TRANSFORM) == PFLAG3_VIEW_IS_ANIMATING_TRANSFORM && 13313 mDisplayList != null) { 13314 // No longer animating: clear out old animation matrix 13315 mDisplayList.setAnimationMatrix(null); 13316 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 13317 } 13318 if (!useDisplayListProperties && 13319 (flags & ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 13320 final boolean hasTransform = 13321 parent.getChildStaticTransformation(this, parent.mChildTransformation); 13322 if (hasTransform) { 13323 final int transformType = parent.mChildTransformation.getTransformationType(); 13324 transformToApply = transformType != Transformation.TYPE_IDENTITY ? 13325 parent.mChildTransformation : null; 13326 concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; 13327 } 13328 } 13329 } 13330 13331 concatMatrix |= !childHasIdentityMatrix; 13332 13333 // Sets the flag as early as possible to allow draw() implementations 13334 // to call invalidate() successfully when doing animations 13335 mPrivateFlags |= PFLAG_DRAWN; 13336 13337 if (!concatMatrix && 13338 (flags & (ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS | 13339 ViewGroup.FLAG_CLIP_CHILDREN)) == ViewGroup.FLAG_CLIP_CHILDREN && 13340 canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && 13341 (mPrivateFlags & PFLAG_DRAW_ANIMATION) == 0) { 13342 mPrivateFlags2 |= PFLAG2_VIEW_QUICK_REJECTED; 13343 return more; 13344 } 13345 mPrivateFlags2 &= ~PFLAG2_VIEW_QUICK_REJECTED; 13346 13347 if (hardwareAccelerated) { 13348 // Clear INVALIDATED flag to allow invalidation to occur during rendering, but 13349 // retain the flag's value temporarily in the mRecreateDisplayList flag 13350 mRecreateDisplayList = (mPrivateFlags & PFLAG_INVALIDATED) == PFLAG_INVALIDATED; 13351 mPrivateFlags &= ~PFLAG_INVALIDATED; 13352 } 13353 13354 DisplayList displayList = null; 13355 Bitmap cache = null; 13356 boolean hasDisplayList = false; 13357 if (caching) { 13358 if (!hardwareAccelerated) { 13359 if (layerType != LAYER_TYPE_NONE) { 13360 layerType = LAYER_TYPE_SOFTWARE; 13361 buildDrawingCache(true); 13362 } 13363 cache = getDrawingCache(true); 13364 } else { 13365 switch (layerType) { 13366 case LAYER_TYPE_SOFTWARE: 13367 if (useDisplayListProperties) { 13368 hasDisplayList = canHaveDisplayList(); 13369 } else { 13370 buildDrawingCache(true); 13371 cache = getDrawingCache(true); 13372 } 13373 break; 13374 case LAYER_TYPE_HARDWARE: 13375 if (useDisplayListProperties) { 13376 hasDisplayList = canHaveDisplayList(); 13377 } 13378 break; 13379 case LAYER_TYPE_NONE: 13380 // Delay getting the display list until animation-driven alpha values are 13381 // set up and possibly passed on to the view 13382 hasDisplayList = canHaveDisplayList(); 13383 break; 13384 } 13385 } 13386 } 13387 useDisplayListProperties &= hasDisplayList; 13388 if (useDisplayListProperties) { 13389 displayList = getDisplayList(); 13390 if (!displayList.isValid()) { 13391 // Uncommon, but possible. If a view is removed from the hierarchy during the call 13392 // to getDisplayList(), the display list will be marked invalid and we should not 13393 // try to use it again. 13394 displayList = null; 13395 hasDisplayList = false; 13396 useDisplayListProperties = false; 13397 } 13398 } 13399 13400 int sx = 0; 13401 int sy = 0; 13402 if (!hasDisplayList) { 13403 computeScroll(); 13404 sx = mScrollX; 13405 sy = mScrollY; 13406 } 13407 13408 final boolean hasNoCache = cache == null || hasDisplayList; 13409 final boolean offsetForScroll = cache == null && !hasDisplayList && 13410 layerType != LAYER_TYPE_HARDWARE; 13411 13412 int restoreTo = -1; 13413 if (!useDisplayListProperties || transformToApply != null) { 13414 restoreTo = canvas.save(); 13415 } 13416 if (offsetForScroll) { 13417 canvas.translate(mLeft - sx, mTop - sy); 13418 } else { 13419 if (!useDisplayListProperties) { 13420 canvas.translate(mLeft, mTop); 13421 } 13422 if (scalingRequired) { 13423 if (useDisplayListProperties) { 13424 // TODO: Might not need this if we put everything inside the DL 13425 restoreTo = canvas.save(); 13426 } 13427 // mAttachInfo cannot be null, otherwise scalingRequired == false 13428 final float scale = 1.0f / mAttachInfo.mApplicationScale; 13429 canvas.scale(scale, scale); 13430 } 13431 } 13432 13433 float alpha = useDisplayListProperties ? 1 : getAlpha(); 13434 if (transformToApply != null || alpha < 1 || !hasIdentityMatrix() || 13435 (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) == PFLAG3_VIEW_IS_ANIMATING_ALPHA) { 13436 if (transformToApply != null || !childHasIdentityMatrix) { 13437 int transX = 0; 13438 int transY = 0; 13439 13440 if (offsetForScroll) { 13441 transX = -sx; 13442 transY = -sy; 13443 } 13444 13445 if (transformToApply != null) { 13446 if (concatMatrix) { 13447 if (useDisplayListProperties) { 13448 displayList.setAnimationMatrix(transformToApply.getMatrix()); 13449 } else { 13450 // Undo the scroll translation, apply the transformation matrix, 13451 // then redo the scroll translate to get the correct result. 13452 canvas.translate(-transX, -transY); 13453 canvas.concat(transformToApply.getMatrix()); 13454 canvas.translate(transX, transY); 13455 } 13456 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 13457 } 13458 13459 float transformAlpha = transformToApply.getAlpha(); 13460 if (transformAlpha < 1) { 13461 alpha *= transformAlpha; 13462 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 13463 } 13464 } 13465 13466 if (!childHasIdentityMatrix && !useDisplayListProperties) { 13467 canvas.translate(-transX, -transY); 13468 canvas.concat(getMatrix()); 13469 canvas.translate(transX, transY); 13470 } 13471 } 13472 13473 // Deal with alpha if it is or used to be <1 13474 if (alpha < 1 || 13475 (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) == PFLAG3_VIEW_IS_ANIMATING_ALPHA) { 13476 if (alpha < 1) { 13477 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_ALPHA; 13478 } else { 13479 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_ALPHA; 13480 } 13481 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 13482 if (hasNoCache) { 13483 final int multipliedAlpha = (int) (255 * alpha); 13484 if (!onSetAlpha(multipliedAlpha)) { 13485 int layerFlags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 13486 if ((flags & ViewGroup.FLAG_CLIP_CHILDREN) != 0 || 13487 layerType != LAYER_TYPE_NONE) { 13488 layerFlags |= Canvas.CLIP_TO_LAYER_SAVE_FLAG; 13489 } 13490 if (useDisplayListProperties) { 13491 displayList.setAlpha(alpha * getAlpha()); 13492 } else if (layerType == LAYER_TYPE_NONE) { 13493 final int scrollX = hasDisplayList ? 0 : sx; 13494 final int scrollY = hasDisplayList ? 0 : sy; 13495 canvas.saveLayerAlpha(scrollX, scrollY, scrollX + mRight - mLeft, 13496 scrollY + mBottom - mTop, multipliedAlpha, layerFlags); 13497 } 13498 } else { 13499 // Alpha is handled by the child directly, clobber the layer's alpha 13500 mPrivateFlags |= PFLAG_ALPHA_SET; 13501 } 13502 } 13503 } 13504 } else if ((mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 13505 onSetAlpha(255); 13506 mPrivateFlags &= ~PFLAG_ALPHA_SET; 13507 } 13508 13509 if ((flags & ViewGroup.FLAG_CLIP_CHILDREN) == ViewGroup.FLAG_CLIP_CHILDREN && 13510 !useDisplayListProperties) { 13511 if (offsetForScroll) { 13512 canvas.clipRect(sx, sy, sx + (mRight - mLeft), sy + (mBottom - mTop)); 13513 } else { 13514 if (!scalingRequired || cache == null) { 13515 canvas.clipRect(0, 0, mRight - mLeft, mBottom - mTop); 13516 } else { 13517 canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); 13518 } 13519 } 13520 } 13521 13522 if (!useDisplayListProperties && hasDisplayList) { 13523 displayList = getDisplayList(); 13524 if (!displayList.isValid()) { 13525 // Uncommon, but possible. If a view is removed from the hierarchy during the call 13526 // to getDisplayList(), the display list will be marked invalid and we should not 13527 // try to use it again. 13528 displayList = null; 13529 hasDisplayList = false; 13530 } 13531 } 13532 13533 if (hasNoCache) { 13534 boolean layerRendered = false; 13535 if (layerType == LAYER_TYPE_HARDWARE && !useDisplayListProperties) { 13536 final HardwareLayer layer = getHardwareLayer(); 13537 if (layer != null && layer.isValid()) { 13538 mLayerPaint.setAlpha((int) (alpha * 255)); 13539 ((HardwareCanvas) canvas).drawHardwareLayer(layer, 0, 0, mLayerPaint); 13540 layerRendered = true; 13541 } else { 13542 final int scrollX = hasDisplayList ? 0 : sx; 13543 final int scrollY = hasDisplayList ? 0 : sy; 13544 canvas.saveLayer(scrollX, scrollY, 13545 scrollX + mRight - mLeft, scrollY + mBottom - mTop, mLayerPaint, 13546 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); 13547 } 13548 } 13549 13550 if (!layerRendered) { 13551 if (!hasDisplayList) { 13552 // Fast path for layouts with no backgrounds 13553 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 13554 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13555 dispatchDraw(canvas); 13556 } else { 13557 draw(canvas); 13558 } 13559 } else { 13560 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13561 ((HardwareCanvas) canvas).drawDisplayList(displayList, null, flags); 13562 } 13563 } 13564 } else if (cache != null) { 13565 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 13566 Paint cachePaint; 13567 13568 if (layerType == LAYER_TYPE_NONE) { 13569 cachePaint = parent.mCachePaint; 13570 if (cachePaint == null) { 13571 cachePaint = new Paint(); 13572 cachePaint.setDither(false); 13573 parent.mCachePaint = cachePaint; 13574 } 13575 if (alpha < 1) { 13576 cachePaint.setAlpha((int) (alpha * 255)); 13577 parent.mGroupFlags |= ViewGroup.FLAG_ALPHA_LOWER_THAN_ONE; 13578 } else if ((flags & ViewGroup.FLAG_ALPHA_LOWER_THAN_ONE) != 0) { 13579 cachePaint.setAlpha(255); 13580 parent.mGroupFlags &= ~ViewGroup.FLAG_ALPHA_LOWER_THAN_ONE; 13581 } 13582 } else { 13583 cachePaint = mLayerPaint; 13584 cachePaint.setAlpha((int) (alpha * 255)); 13585 } 13586 canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); 13587 } 13588 13589 if (restoreTo >= 0) { 13590 canvas.restoreToCount(restoreTo); 13591 } 13592 13593 if (a != null && !more) { 13594 if (!hardwareAccelerated && !a.getFillAfter()) { 13595 onSetAlpha(255); 13596 } 13597 parent.finishAnimatingView(this, a); 13598 } 13599 13600 if (more && hardwareAccelerated) { 13601 // invalidation is the trigger to recreate display lists, so if we're using 13602 // display lists to render, force an invalidate to allow the animation to 13603 // continue drawing another frame 13604 parent.invalidate(true); 13605 if (a.hasAlpha() && (mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 13606 // alpha animations should cause the child to recreate its display list 13607 invalidate(true); 13608 } 13609 } 13610 13611 mRecreateDisplayList = false; 13612 13613 return more; 13614 } 13615 13616 /** 13617 * Manually render this view (and all of its children) to the given Canvas. 13618 * The view must have already done a full layout before this function is 13619 * called. When implementing a view, implement 13620 * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. 13621 * If you do need to override this method, call the superclass version. 13622 * 13623 * @param canvas The Canvas to which the View is rendered. 13624 */ 13625 public void draw(Canvas canvas) { 13626 final int privateFlags = mPrivateFlags; 13627 final boolean dirtyOpaque = (privateFlags & PFLAG_DIRTY_MASK) == PFLAG_DIRTY_OPAQUE && 13628 (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); 13629 mPrivateFlags = (privateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN; 13630 13631 /* 13632 * Draw traversal performs several drawing steps which must be executed 13633 * in the appropriate order: 13634 * 13635 * 1. Draw the background 13636 * 2. If necessary, save the canvas' layers to prepare for fading 13637 * 3. Draw view's content 13638 * 4. Draw children 13639 * 5. If necessary, draw the fading edges and restore layers 13640 * 6. Draw decorations (scrollbars for instance) 13641 */ 13642 13643 // Step 1, draw the background, if needed 13644 int saveCount; 13645 13646 if (!dirtyOpaque) { 13647 final Drawable background = mBackground; 13648 if (background != null) { 13649 final int scrollX = mScrollX; 13650 final int scrollY = mScrollY; 13651 13652 if (mBackgroundSizeChanged) { 13653 background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); 13654 mBackgroundSizeChanged = false; 13655 } 13656 13657 if ((scrollX | scrollY) == 0) { 13658 background.draw(canvas); 13659 } else { 13660 canvas.translate(scrollX, scrollY); 13661 background.draw(canvas); 13662 canvas.translate(-scrollX, -scrollY); 13663 } 13664 } 13665 } 13666 13667 // skip step 2 & 5 if possible (common case) 13668 final int viewFlags = mViewFlags; 13669 boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; 13670 boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; 13671 if (!verticalEdges && !horizontalEdges) { 13672 // Step 3, draw the content 13673 if (!dirtyOpaque) onDraw(canvas); 13674 13675 // Step 4, draw the children 13676 dispatchDraw(canvas); 13677 13678 // Step 6, draw decorations (scrollbars) 13679 onDrawScrollBars(canvas); 13680 13681 // we're done... 13682 return; 13683 } 13684 13685 /* 13686 * Here we do the full fledged routine... 13687 * (this is an uncommon case where speed matters less, 13688 * this is why we repeat some of the tests that have been 13689 * done above) 13690 */ 13691 13692 boolean drawTop = false; 13693 boolean drawBottom = false; 13694 boolean drawLeft = false; 13695 boolean drawRight = false; 13696 13697 float topFadeStrength = 0.0f; 13698 float bottomFadeStrength = 0.0f; 13699 float leftFadeStrength = 0.0f; 13700 float rightFadeStrength = 0.0f; 13701 13702 // Step 2, save the canvas' layers 13703 int paddingLeft = mPaddingLeft; 13704 13705 final boolean offsetRequired = isPaddingOffsetRequired(); 13706 if (offsetRequired) { 13707 paddingLeft += getLeftPaddingOffset(); 13708 } 13709 13710 int left = mScrollX + paddingLeft; 13711 int right = left + mRight - mLeft - mPaddingRight - paddingLeft; 13712 int top = mScrollY + getFadeTop(offsetRequired); 13713 int bottom = top + getFadeHeight(offsetRequired); 13714 13715 if (offsetRequired) { 13716 right += getRightPaddingOffset(); 13717 bottom += getBottomPaddingOffset(); 13718 } 13719 13720 final ScrollabilityCache scrollabilityCache = mScrollCache; 13721 final float fadeHeight = scrollabilityCache.fadingEdgeLength; 13722 int length = (int) fadeHeight; 13723 13724 // clip the fade length if top and bottom fades overlap 13725 // overlapping fades produce odd-looking artifacts 13726 if (verticalEdges && (top + length > bottom - length)) { 13727 length = (bottom - top) / 2; 13728 } 13729 13730 // also clip horizontal fades if necessary 13731 if (horizontalEdges && (left + length > right - length)) { 13732 length = (right - left) / 2; 13733 } 13734 13735 if (verticalEdges) { 13736 topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); 13737 drawTop = topFadeStrength * fadeHeight > 1.0f; 13738 bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); 13739 drawBottom = bottomFadeStrength * fadeHeight > 1.0f; 13740 } 13741 13742 if (horizontalEdges) { 13743 leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); 13744 drawLeft = leftFadeStrength * fadeHeight > 1.0f; 13745 rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); 13746 drawRight = rightFadeStrength * fadeHeight > 1.0f; 13747 } 13748 13749 saveCount = canvas.getSaveCount(); 13750 13751 int solidColor = getSolidColor(); 13752 if (solidColor == 0) { 13753 final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 13754 13755 if (drawTop) { 13756 canvas.saveLayer(left, top, right, top + length, null, flags); 13757 } 13758 13759 if (drawBottom) { 13760 canvas.saveLayer(left, bottom - length, right, bottom, null, flags); 13761 } 13762 13763 if (drawLeft) { 13764 canvas.saveLayer(left, top, left + length, bottom, null, flags); 13765 } 13766 13767 if (drawRight) { 13768 canvas.saveLayer(right - length, top, right, bottom, null, flags); 13769 } 13770 } else { 13771 scrollabilityCache.setFadeColor(solidColor); 13772 } 13773 13774 // Step 3, draw the content 13775 if (!dirtyOpaque) onDraw(canvas); 13776 13777 // Step 4, draw the children 13778 dispatchDraw(canvas); 13779 13780 // Step 5, draw the fade effect and restore layers 13781 final Paint p = scrollabilityCache.paint; 13782 final Matrix matrix = scrollabilityCache.matrix; 13783 final Shader fade = scrollabilityCache.shader; 13784 13785 if (drawTop) { 13786 matrix.setScale(1, fadeHeight * topFadeStrength); 13787 matrix.postTranslate(left, top); 13788 fade.setLocalMatrix(matrix); 13789 canvas.drawRect(left, top, right, top + length, p); 13790 } 13791 13792 if (drawBottom) { 13793 matrix.setScale(1, fadeHeight * bottomFadeStrength); 13794 matrix.postRotate(180); 13795 matrix.postTranslate(left, bottom); 13796 fade.setLocalMatrix(matrix); 13797 canvas.drawRect(left, bottom - length, right, bottom, p); 13798 } 13799 13800 if (drawLeft) { 13801 matrix.setScale(1, fadeHeight * leftFadeStrength); 13802 matrix.postRotate(-90); 13803 matrix.postTranslate(left, top); 13804 fade.setLocalMatrix(matrix); 13805 canvas.drawRect(left, top, left + length, bottom, p); 13806 } 13807 13808 if (drawRight) { 13809 matrix.setScale(1, fadeHeight * rightFadeStrength); 13810 matrix.postRotate(90); 13811 matrix.postTranslate(right, top); 13812 fade.setLocalMatrix(matrix); 13813 canvas.drawRect(right - length, top, right, bottom, p); 13814 } 13815 13816 canvas.restoreToCount(saveCount); 13817 13818 // Step 6, draw decorations (scrollbars) 13819 onDrawScrollBars(canvas); 13820 } 13821 13822 /** 13823 * Override this if your view is known to always be drawn on top of a solid color background, 13824 * and needs to draw fading edges. Returning a non-zero color enables the view system to 13825 * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha 13826 * should be set to 0xFF. 13827 * 13828 * @see #setVerticalFadingEdgeEnabled(boolean) 13829 * @see #setHorizontalFadingEdgeEnabled(boolean) 13830 * 13831 * @return The known solid color background for this view, or 0 if the color may vary 13832 */ 13833 @ViewDebug.ExportedProperty(category = "drawing") 13834 public int getSolidColor() { 13835 return 0; 13836 } 13837 13838 /** 13839 * Build a human readable string representation of the specified view flags. 13840 * 13841 * @param flags the view flags to convert to a string 13842 * @return a String representing the supplied flags 13843 */ 13844 private static String printFlags(int flags) { 13845 String output = ""; 13846 int numFlags = 0; 13847 if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { 13848 output += "TAKES_FOCUS"; 13849 numFlags++; 13850 } 13851 13852 switch (flags & VISIBILITY_MASK) { 13853 case INVISIBLE: 13854 if (numFlags > 0) { 13855 output += " "; 13856 } 13857 output += "INVISIBLE"; 13858 // USELESS HERE numFlags++; 13859 break; 13860 case GONE: 13861 if (numFlags > 0) { 13862 output += " "; 13863 } 13864 output += "GONE"; 13865 // USELESS HERE numFlags++; 13866 break; 13867 default: 13868 break; 13869 } 13870 return output; 13871 } 13872 13873 /** 13874 * Build a human readable string representation of the specified private 13875 * view flags. 13876 * 13877 * @param privateFlags the private view flags to convert to a string 13878 * @return a String representing the supplied flags 13879 */ 13880 private static String printPrivateFlags(int privateFlags) { 13881 String output = ""; 13882 int numFlags = 0; 13883 13884 if ((privateFlags & PFLAG_WANTS_FOCUS) == PFLAG_WANTS_FOCUS) { 13885 output += "WANTS_FOCUS"; 13886 numFlags++; 13887 } 13888 13889 if ((privateFlags & PFLAG_FOCUSED) == PFLAG_FOCUSED) { 13890 if (numFlags > 0) { 13891 output += " "; 13892 } 13893 output += "FOCUSED"; 13894 numFlags++; 13895 } 13896 13897 if ((privateFlags & PFLAG_SELECTED) == PFLAG_SELECTED) { 13898 if (numFlags > 0) { 13899 output += " "; 13900 } 13901 output += "SELECTED"; 13902 numFlags++; 13903 } 13904 13905 if ((privateFlags & PFLAG_IS_ROOT_NAMESPACE) == PFLAG_IS_ROOT_NAMESPACE) { 13906 if (numFlags > 0) { 13907 output += " "; 13908 } 13909 output += "IS_ROOT_NAMESPACE"; 13910 numFlags++; 13911 } 13912 13913 if ((privateFlags & PFLAG_HAS_BOUNDS) == PFLAG_HAS_BOUNDS) { 13914 if (numFlags > 0) { 13915 output += " "; 13916 } 13917 output += "HAS_BOUNDS"; 13918 numFlags++; 13919 } 13920 13921 if ((privateFlags & PFLAG_DRAWN) == PFLAG_DRAWN) { 13922 if (numFlags > 0) { 13923 output += " "; 13924 } 13925 output += "DRAWN"; 13926 // USELESS HERE numFlags++; 13927 } 13928 return output; 13929 } 13930 13931 /** 13932 * <p>Indicates whether or not this view's layout will be requested during 13933 * the next hierarchy layout pass.</p> 13934 * 13935 * @return true if the layout will be forced during next layout pass 13936 */ 13937 public boolean isLayoutRequested() { 13938 return (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; 13939 } 13940 13941 /** 13942 * Return true if o is a ViewGroup that is laying out using optical bounds. 13943 * @hide 13944 */ 13945 public static boolean isLayoutModeOptical(Object o) { 13946 return o instanceof ViewGroup && ((ViewGroup) o).isLayoutModeOptical(); 13947 } 13948 13949 private boolean setOpticalFrame(int left, int top, int right, int bottom) { 13950 Insets parentInsets = mParent instanceof View ? 13951 ((View) mParent).getOpticalInsets() : Insets.NONE; 13952 Insets childInsets = getOpticalInsets(); 13953 return setFrame( 13954 left + parentInsets.left - childInsets.left, 13955 top + parentInsets.top - childInsets.top, 13956 right + parentInsets.left + childInsets.right, 13957 bottom + parentInsets.top + childInsets.bottom); 13958 } 13959 13960 /** 13961 * Assign a size and position to a view and all of its 13962 * descendants 13963 * 13964 * <p>This is the second phase of the layout mechanism. 13965 * (The first is measuring). In this phase, each parent calls 13966 * layout on all of its children to position them. 13967 * This is typically done using the child measurements 13968 * that were stored in the measure pass().</p> 13969 * 13970 * <p>Derived classes should not override this method. 13971 * Derived classes with children should override 13972 * onLayout. In that method, they should 13973 * call layout on each of their children.</p> 13974 * 13975 * @param l Left position, relative to parent 13976 * @param t Top position, relative to parent 13977 * @param r Right position, relative to parent 13978 * @param b Bottom position, relative to parent 13979 */ 13980 @SuppressWarnings({"unchecked"}) 13981 public void layout(int l, int t, int r, int b) { 13982 int oldL = mLeft; 13983 int oldT = mTop; 13984 int oldB = mBottom; 13985 int oldR = mRight; 13986 boolean changed = isLayoutModeOptical(mParent) ? 13987 setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b); 13988 if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) { 13989 onLayout(changed, l, t, r, b); 13990 mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED; 13991 13992 ListenerInfo li = mListenerInfo; 13993 if (li != null && li.mOnLayoutChangeListeners != null) { 13994 ArrayList<OnLayoutChangeListener> listenersCopy = 13995 (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone(); 13996 int numListeners = listenersCopy.size(); 13997 for (int i = 0; i < numListeners; ++i) { 13998 listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); 13999 } 14000 } 14001 } 14002 mPrivateFlags &= ~PFLAG_FORCE_LAYOUT; 14003 } 14004 14005 /** 14006 * Called from layout when this view should 14007 * assign a size and position to each of its children. 14008 * 14009 * Derived classes with children should override 14010 * this method and call layout on each of 14011 * their children. 14012 * @param changed This is a new size or position for this view 14013 * @param left Left position, relative to parent 14014 * @param top Top position, relative to parent 14015 * @param right Right position, relative to parent 14016 * @param bottom Bottom position, relative to parent 14017 */ 14018 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 14019 } 14020 14021 /** 14022 * Assign a size and position to this view. 14023 * 14024 * This is called from layout. 14025 * 14026 * @param left Left position, relative to parent 14027 * @param top Top position, relative to parent 14028 * @param right Right position, relative to parent 14029 * @param bottom Bottom position, relative to parent 14030 * @return true if the new size and position are different than the 14031 * previous ones 14032 * {@hide} 14033 */ 14034 protected boolean setFrame(int left, int top, int right, int bottom) { 14035 boolean changed = false; 14036 14037 if (DBG) { 14038 Log.d("View", this + " View.setFrame(" + left + "," + top + "," 14039 + right + "," + bottom + ")"); 14040 } 14041 14042 if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { 14043 changed = true; 14044 14045 // Remember our drawn bit 14046 int drawn = mPrivateFlags & PFLAG_DRAWN; 14047 14048 int oldWidth = mRight - mLeft; 14049 int oldHeight = mBottom - mTop; 14050 int newWidth = right - left; 14051 int newHeight = bottom - top; 14052 boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); 14053 14054 // Invalidate our old position 14055 invalidate(sizeChanged); 14056 14057 mLeft = left; 14058 mTop = top; 14059 mRight = right; 14060 mBottom = bottom; 14061 if (mDisplayList != null) { 14062 mDisplayList.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 14063 } 14064 14065 mPrivateFlags |= PFLAG_HAS_BOUNDS; 14066 14067 14068 if (sizeChanged) { 14069 if ((mPrivateFlags & PFLAG_PIVOT_EXPLICITLY_SET) == 0) { 14070 // A change in dimension means an auto-centered pivot point changes, too 14071 if (mTransformationInfo != null) { 14072 mTransformationInfo.mMatrixDirty = true; 14073 } 14074 } 14075 onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); 14076 } 14077 14078 if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) { 14079 // If we are visible, force the DRAWN bit to on so that 14080 // this invalidate will go through (at least to our parent). 14081 // This is because someone may have invalidated this view 14082 // before this call to setFrame came in, thereby clearing 14083 // the DRAWN bit. 14084 mPrivateFlags |= PFLAG_DRAWN; 14085 invalidate(sizeChanged); 14086 // parent display list may need to be recreated based on a change in the bounds 14087 // of any child 14088 invalidateParentCaches(); 14089 } 14090 14091 // Reset drawn bit to original value (invalidate turns it off) 14092 mPrivateFlags |= drawn; 14093 14094 mBackgroundSizeChanged = true; 14095 } 14096 return changed; 14097 } 14098 14099 /** 14100 * Finalize inflating a view from XML. This is called as the last phase 14101 * of inflation, after all child views have been added. 14102 * 14103 * <p>Even if the subclass overrides onFinishInflate, they should always be 14104 * sure to call the super method, so that we get called. 14105 */ 14106 protected void onFinishInflate() { 14107 } 14108 14109 /** 14110 * Returns the resources associated with this view. 14111 * 14112 * @return Resources object. 14113 */ 14114 public Resources getResources() { 14115 return mResources; 14116 } 14117 14118 /** 14119 * Invalidates the specified Drawable. 14120 * 14121 * @param drawable the drawable to invalidate 14122 */ 14123 public void invalidateDrawable(Drawable drawable) { 14124 if (verifyDrawable(drawable)) { 14125 final Rect dirty = drawable.getBounds(); 14126 final int scrollX = mScrollX; 14127 final int scrollY = mScrollY; 14128 14129 invalidate(dirty.left + scrollX, dirty.top + scrollY, 14130 dirty.right + scrollX, dirty.bottom + scrollY); 14131 } 14132 } 14133 14134 /** 14135 * Schedules an action on a drawable to occur at a specified time. 14136 * 14137 * @param who the recipient of the action 14138 * @param what the action to run on the drawable 14139 * @param when the time at which the action must occur. Uses the 14140 * {@link SystemClock#uptimeMillis} timebase. 14141 */ 14142 public void scheduleDrawable(Drawable who, Runnable what, long when) { 14143 if (verifyDrawable(who) && what != null) { 14144 final long delay = when - SystemClock.uptimeMillis(); 14145 if (mAttachInfo != null) { 14146 mAttachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 14147 Choreographer.CALLBACK_ANIMATION, what, who, 14148 Choreographer.subtractFrameDelay(delay)); 14149 } else { 14150 ViewRootImpl.getRunQueue().postDelayed(what, delay); 14151 } 14152 } 14153 } 14154 14155 /** 14156 * Cancels a scheduled action on a drawable. 14157 * 14158 * @param who the recipient of the action 14159 * @param what the action to cancel 14160 */ 14161 public void unscheduleDrawable(Drawable who, Runnable what) { 14162 if (verifyDrawable(who) && what != null) { 14163 if (mAttachInfo != null) { 14164 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 14165 Choreographer.CALLBACK_ANIMATION, what, who); 14166 } else { 14167 ViewRootImpl.getRunQueue().removeCallbacks(what); 14168 } 14169 } 14170 } 14171 14172 /** 14173 * Unschedule any events associated with the given Drawable. This can be 14174 * used when selecting a new Drawable into a view, so that the previous 14175 * one is completely unscheduled. 14176 * 14177 * @param who The Drawable to unschedule. 14178 * 14179 * @see #drawableStateChanged 14180 */ 14181 public void unscheduleDrawable(Drawable who) { 14182 if (mAttachInfo != null && who != null) { 14183 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 14184 Choreographer.CALLBACK_ANIMATION, null, who); 14185 } 14186 } 14187 14188 /** 14189 * Resolve the Drawables depending on the layout direction. This is implicitly supposing 14190 * that the View directionality can and will be resolved before its Drawables. 14191 * 14192 * Will call {@link View#onResolveDrawables} when resolution is done. 14193 * 14194 * @hide 14195 */ 14196 public void resolveDrawables() { 14197 if (mBackground != null) { 14198 mBackground.setLayoutDirection(getLayoutDirection()); 14199 } 14200 mPrivateFlags2 |= PFLAG2_DRAWABLE_RESOLVED; 14201 onResolveDrawables(getLayoutDirection()); 14202 } 14203 14204 /** 14205 * Called when layout direction has been resolved. 14206 * 14207 * The default implementation does nothing. 14208 * 14209 * @param layoutDirection The resolved layout direction. 14210 * 14211 * @see #LAYOUT_DIRECTION_LTR 14212 * @see #LAYOUT_DIRECTION_RTL 14213 * 14214 * @hide 14215 */ 14216 public void onResolveDrawables(int layoutDirection) { 14217 } 14218 14219 private void resetResolvedDrawables() { 14220 mPrivateFlags2 &= ~PFLAG2_DRAWABLE_RESOLVED; 14221 } 14222 14223 private boolean isDrawablesResolved() { 14224 return (mPrivateFlags2 & PFLAG2_DRAWABLE_RESOLVED) == PFLAG2_DRAWABLE_RESOLVED; 14225 } 14226 14227 /** 14228 * If your view subclass is displaying its own Drawable objects, it should 14229 * override this function and return true for any Drawable it is 14230 * displaying. This allows animations for those drawables to be 14231 * scheduled. 14232 * 14233 * <p>Be sure to call through to the super class when overriding this 14234 * function. 14235 * 14236 * @param who The Drawable to verify. Return true if it is one you are 14237 * displaying, else return the result of calling through to the 14238 * super class. 14239 * 14240 * @return boolean If true than the Drawable is being displayed in the 14241 * view; else false and it is not allowed to animate. 14242 * 14243 * @see #unscheduleDrawable(android.graphics.drawable.Drawable) 14244 * @see #drawableStateChanged() 14245 */ 14246 protected boolean verifyDrawable(Drawable who) { 14247 return who == mBackground; 14248 } 14249 14250 /** 14251 * This function is called whenever the state of the view changes in such 14252 * a way that it impacts the state of drawables being shown. 14253 * 14254 * <p>Be sure to call through to the superclass when overriding this 14255 * function. 14256 * 14257 * @see Drawable#setState(int[]) 14258 */ 14259 protected void drawableStateChanged() { 14260 Drawable d = mBackground; 14261 if (d != null && d.isStateful()) { 14262 d.setState(getDrawableState()); 14263 } 14264 } 14265 14266 /** 14267 * Call this to force a view to update its drawable state. This will cause 14268 * drawableStateChanged to be called on this view. Views that are interested 14269 * in the new state should call getDrawableState. 14270 * 14271 * @see #drawableStateChanged 14272 * @see #getDrawableState 14273 */ 14274 public void refreshDrawableState() { 14275 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 14276 drawableStateChanged(); 14277 14278 ViewParent parent = mParent; 14279 if (parent != null) { 14280 parent.childDrawableStateChanged(this); 14281 } 14282 } 14283 14284 /** 14285 * Return an array of resource IDs of the drawable states representing the 14286 * current state of the view. 14287 * 14288 * @return The current drawable state 14289 * 14290 * @see Drawable#setState(int[]) 14291 * @see #drawableStateChanged() 14292 * @see #onCreateDrawableState(int) 14293 */ 14294 public final int[] getDrawableState() { 14295 if ((mDrawableState != null) && ((mPrivateFlags & PFLAG_DRAWABLE_STATE_DIRTY) == 0)) { 14296 return mDrawableState; 14297 } else { 14298 mDrawableState = onCreateDrawableState(0); 14299 mPrivateFlags &= ~PFLAG_DRAWABLE_STATE_DIRTY; 14300 return mDrawableState; 14301 } 14302 } 14303 14304 /** 14305 * Generate the new {@link android.graphics.drawable.Drawable} state for 14306 * this view. This is called by the view 14307 * system when the cached Drawable state is determined to be invalid. To 14308 * retrieve the current state, you should use {@link #getDrawableState}. 14309 * 14310 * @param extraSpace if non-zero, this is the number of extra entries you 14311 * would like in the returned array in which you can place your own 14312 * states. 14313 * 14314 * @return Returns an array holding the current {@link Drawable} state of 14315 * the view. 14316 * 14317 * @see #mergeDrawableStates(int[], int[]) 14318 */ 14319 protected int[] onCreateDrawableState(int extraSpace) { 14320 if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && 14321 mParent instanceof View) { 14322 return ((View) mParent).onCreateDrawableState(extraSpace); 14323 } 14324 14325 int[] drawableState; 14326 14327 int privateFlags = mPrivateFlags; 14328 14329 int viewStateIndex = 0; 14330 if ((privateFlags & PFLAG_PRESSED) != 0) viewStateIndex |= VIEW_STATE_PRESSED; 14331 if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= VIEW_STATE_ENABLED; 14332 if (isFocused()) viewStateIndex |= VIEW_STATE_FOCUSED; 14333 if ((privateFlags & PFLAG_SELECTED) != 0) viewStateIndex |= VIEW_STATE_SELECTED; 14334 if (hasWindowFocus()) viewStateIndex |= VIEW_STATE_WINDOW_FOCUSED; 14335 if ((privateFlags & PFLAG_ACTIVATED) != 0) viewStateIndex |= VIEW_STATE_ACTIVATED; 14336 if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && 14337 HardwareRenderer.isAvailable()) { 14338 // This is set if HW acceleration is requested, even if the current 14339 // process doesn't allow it. This is just to allow app preview 14340 // windows to better match their app. 14341 viewStateIndex |= VIEW_STATE_ACCELERATED; 14342 } 14343 if ((privateFlags & PFLAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_HOVERED; 14344 14345 final int privateFlags2 = mPrivateFlags2; 14346 if ((privateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0) viewStateIndex |= VIEW_STATE_DRAG_CAN_ACCEPT; 14347 if ((privateFlags2 & PFLAG2_DRAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_DRAG_HOVERED; 14348 14349 drawableState = VIEW_STATE_SETS[viewStateIndex]; 14350 14351 //noinspection ConstantIfStatement 14352 if (false) { 14353 Log.i("View", "drawableStateIndex=" + viewStateIndex); 14354 Log.i("View", toString() 14355 + " pressed=" + ((privateFlags & PFLAG_PRESSED) != 0) 14356 + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) 14357 + " fo=" + hasFocus() 14358 + " sl=" + ((privateFlags & PFLAG_SELECTED) != 0) 14359 + " wf=" + hasWindowFocus() 14360 + ": " + Arrays.toString(drawableState)); 14361 } 14362 14363 if (extraSpace == 0) { 14364 return drawableState; 14365 } 14366 14367 final int[] fullState; 14368 if (drawableState != null) { 14369 fullState = new int[drawableState.length + extraSpace]; 14370 System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); 14371 } else { 14372 fullState = new int[extraSpace]; 14373 } 14374 14375 return fullState; 14376 } 14377 14378 /** 14379 * Merge your own state values in <var>additionalState</var> into the base 14380 * state values <var>baseState</var> that were returned by 14381 * {@link #onCreateDrawableState(int)}. 14382 * 14383 * @param baseState The base state values returned by 14384 * {@link #onCreateDrawableState(int)}, which will be modified to also hold your 14385 * own additional state values. 14386 * 14387 * @param additionalState The additional state values you would like 14388 * added to <var>baseState</var>; this array is not modified. 14389 * 14390 * @return As a convenience, the <var>baseState</var> array you originally 14391 * passed into the function is returned. 14392 * 14393 * @see #onCreateDrawableState(int) 14394 */ 14395 protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { 14396 final int N = baseState.length; 14397 int i = N - 1; 14398 while (i >= 0 && baseState[i] == 0) { 14399 i--; 14400 } 14401 System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); 14402 return baseState; 14403 } 14404 14405 /** 14406 * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} 14407 * on all Drawable objects associated with this view. 14408 */ 14409 public void jumpDrawablesToCurrentState() { 14410 if (mBackground != null) { 14411 mBackground.jumpToCurrentState(); 14412 } 14413 } 14414 14415 /** 14416 * Sets the background color for this view. 14417 * @param color the color of the background 14418 */ 14419 @RemotableViewMethod 14420 public void setBackgroundColor(int color) { 14421 if (mBackground instanceof ColorDrawable) { 14422 ((ColorDrawable) mBackground.mutate()).setColor(color); 14423 computeOpaqueFlags(); 14424 } else { 14425 setBackground(new ColorDrawable(color)); 14426 } 14427 } 14428 14429 /** 14430 * Set the background to a given resource. The resource should refer to 14431 * a Drawable object or 0 to remove the background. 14432 * @param resid The identifier of the resource. 14433 * 14434 * @attr ref android.R.styleable#View_background 14435 */ 14436 @RemotableViewMethod 14437 public void setBackgroundResource(int resid) { 14438 if (resid != 0 && resid == mBackgroundResource) { 14439 return; 14440 } 14441 14442 Drawable d= null; 14443 if (resid != 0) { 14444 d = mResources.getDrawable(resid); 14445 } 14446 setBackground(d); 14447 14448 mBackgroundResource = resid; 14449 } 14450 14451 /** 14452 * Set the background to a given Drawable, or remove the background. If the 14453 * background has padding, this View's padding is set to the background's 14454 * padding. However, when a background is removed, this View's padding isn't 14455 * touched. If setting the padding is desired, please use 14456 * {@link #setPadding(int, int, int, int)}. 14457 * 14458 * @param background The Drawable to use as the background, or null to remove the 14459 * background 14460 */ 14461 public void setBackground(Drawable background) { 14462 //noinspection deprecation 14463 setBackgroundDrawable(background); 14464 } 14465 14466 /** 14467 * @deprecated use {@link #setBackground(Drawable)} instead 14468 */ 14469 @Deprecated 14470 public void setBackgroundDrawable(Drawable background) { 14471 computeOpaqueFlags(); 14472 14473 if (background == mBackground) { 14474 return; 14475 } 14476 14477 boolean requestLayout = false; 14478 14479 mBackgroundResource = 0; 14480 14481 /* 14482 * Regardless of whether we're setting a new background or not, we want 14483 * to clear the previous drawable. 14484 */ 14485 if (mBackground != null) { 14486 mBackground.setCallback(null); 14487 unscheduleDrawable(mBackground); 14488 } 14489 14490 if (background != null) { 14491 Rect padding = sThreadLocal.get(); 14492 if (padding == null) { 14493 padding = new Rect(); 14494 sThreadLocal.set(padding); 14495 } 14496 resetResolvedDrawables(); 14497 background.setLayoutDirection(getLayoutDirection()); 14498 if (background.getPadding(padding)) { 14499 resetResolvedPadding(); 14500 switch (background.getLayoutDirection()) { 14501 case LAYOUT_DIRECTION_RTL: 14502 mUserPaddingLeftInitial = padding.right; 14503 mUserPaddingRightInitial = padding.left; 14504 internalSetPadding(padding.right, padding.top, padding.left, padding.bottom); 14505 break; 14506 case LAYOUT_DIRECTION_LTR: 14507 default: 14508 mUserPaddingLeftInitial = padding.left; 14509 mUserPaddingRightInitial = padding.right; 14510 internalSetPadding(padding.left, padding.top, padding.right, padding.bottom); 14511 } 14512 } 14513 14514 // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or 14515 // if it has a different minimum size, we should layout again 14516 if (mBackground == null || mBackground.getMinimumHeight() != background.getMinimumHeight() || 14517 mBackground.getMinimumWidth() != background.getMinimumWidth()) { 14518 requestLayout = true; 14519 } 14520 14521 background.setCallback(this); 14522 if (background.isStateful()) { 14523 background.setState(getDrawableState()); 14524 } 14525 background.setVisible(getVisibility() == VISIBLE, false); 14526 mBackground = background; 14527 14528 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 14529 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 14530 mPrivateFlags |= PFLAG_ONLY_DRAWS_BACKGROUND; 14531 requestLayout = true; 14532 } 14533 } else { 14534 /* Remove the background */ 14535 mBackground = null; 14536 14537 if ((mPrivateFlags & PFLAG_ONLY_DRAWS_BACKGROUND) != 0) { 14538 /* 14539 * This view ONLY drew the background before and we're removing 14540 * the background, so now it won't draw anything 14541 * (hence we SKIP_DRAW) 14542 */ 14543 mPrivateFlags &= ~PFLAG_ONLY_DRAWS_BACKGROUND; 14544 mPrivateFlags |= PFLAG_SKIP_DRAW; 14545 } 14546 14547 /* 14548 * When the background is set, we try to apply its padding to this 14549 * View. When the background is removed, we don't touch this View's 14550 * padding. This is noted in the Javadocs. Hence, we don't need to 14551 * requestLayout(), the invalidate() below is sufficient. 14552 */ 14553 14554 // The old background's minimum size could have affected this 14555 // View's layout, so let's requestLayout 14556 requestLayout = true; 14557 } 14558 14559 computeOpaqueFlags(); 14560 14561 if (requestLayout) { 14562 requestLayout(); 14563 } 14564 14565 mBackgroundSizeChanged = true; 14566 invalidate(true); 14567 } 14568 14569 /** 14570 * Gets the background drawable 14571 * 14572 * @return The drawable used as the background for this view, if any. 14573 * 14574 * @see #setBackground(Drawable) 14575 * 14576 * @attr ref android.R.styleable#View_background 14577 */ 14578 public Drawable getBackground() { 14579 return mBackground; 14580 } 14581 14582 /** 14583 * Sets the padding. The view may add on the space required to display 14584 * the scrollbars, depending on the style and visibility of the scrollbars. 14585 * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, 14586 * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different 14587 * from the values set in this call. 14588 * 14589 * @attr ref android.R.styleable#View_padding 14590 * @attr ref android.R.styleable#View_paddingBottom 14591 * @attr ref android.R.styleable#View_paddingLeft 14592 * @attr ref android.R.styleable#View_paddingRight 14593 * @attr ref android.R.styleable#View_paddingTop 14594 * @param left the left padding in pixels 14595 * @param top the top padding in pixels 14596 * @param right the right padding in pixels 14597 * @param bottom the bottom padding in pixels 14598 */ 14599 public void setPadding(int left, int top, int right, int bottom) { 14600 resetResolvedPadding(); 14601 14602 mUserPaddingStart = UNDEFINED_PADDING; 14603 mUserPaddingEnd = UNDEFINED_PADDING; 14604 14605 mUserPaddingLeftInitial = left; 14606 mUserPaddingRightInitial = right; 14607 14608 internalSetPadding(left, top, right, bottom); 14609 } 14610 14611 /** 14612 * @hide 14613 */ 14614 protected void internalSetPadding(int left, int top, int right, int bottom) { 14615 mUserPaddingLeft = left; 14616 mUserPaddingRight = right; 14617 mUserPaddingBottom = bottom; 14618 14619 final int viewFlags = mViewFlags; 14620 boolean changed = false; 14621 14622 // Common case is there are no scroll bars. 14623 if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { 14624 if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { 14625 final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 14626 ? 0 : getVerticalScrollbarWidth(); 14627 switch (mVerticalScrollbarPosition) { 14628 case SCROLLBAR_POSITION_DEFAULT: 14629 if (isLayoutRtl()) { 14630 left += offset; 14631 } else { 14632 right += offset; 14633 } 14634 break; 14635 case SCROLLBAR_POSITION_RIGHT: 14636 right += offset; 14637 break; 14638 case SCROLLBAR_POSITION_LEFT: 14639 left += offset; 14640 break; 14641 } 14642 } 14643 if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { 14644 bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 14645 ? 0 : getHorizontalScrollbarHeight(); 14646 } 14647 } 14648 14649 if (mPaddingLeft != left) { 14650 changed = true; 14651 mPaddingLeft = left; 14652 } 14653 if (mPaddingTop != top) { 14654 changed = true; 14655 mPaddingTop = top; 14656 } 14657 if (mPaddingRight != right) { 14658 changed = true; 14659 mPaddingRight = right; 14660 } 14661 if (mPaddingBottom != bottom) { 14662 changed = true; 14663 mPaddingBottom = bottom; 14664 } 14665 14666 if (changed) { 14667 requestLayout(); 14668 } 14669 } 14670 14671 /** 14672 * Sets the relative padding. The view may add on the space required to display 14673 * the scrollbars, depending on the style and visibility of the scrollbars. 14674 * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, 14675 * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different 14676 * from the values set in this call. 14677 * 14678 * @attr ref android.R.styleable#View_padding 14679 * @attr ref android.R.styleable#View_paddingBottom 14680 * @attr ref android.R.styleable#View_paddingStart 14681 * @attr ref android.R.styleable#View_paddingEnd 14682 * @attr ref android.R.styleable#View_paddingTop 14683 * @param start the start padding in pixels 14684 * @param top the top padding in pixels 14685 * @param end the end padding in pixels 14686 * @param bottom the bottom padding in pixels 14687 */ 14688 public void setPaddingRelative(int start, int top, int end, int bottom) { 14689 resetResolvedPadding(); 14690 14691 mUserPaddingStart = start; 14692 mUserPaddingEnd = end; 14693 14694 switch(getLayoutDirection()) { 14695 case LAYOUT_DIRECTION_RTL: 14696 mUserPaddingLeftInitial = end; 14697 mUserPaddingRightInitial = start; 14698 internalSetPadding(end, top, start, bottom); 14699 break; 14700 case LAYOUT_DIRECTION_LTR: 14701 default: 14702 mUserPaddingLeftInitial = start; 14703 mUserPaddingRightInitial = end; 14704 internalSetPadding(start, top, end, bottom); 14705 } 14706 } 14707 14708 /** 14709 * Returns the top padding of this view. 14710 * 14711 * @return the top padding in pixels 14712 */ 14713 public int getPaddingTop() { 14714 return mPaddingTop; 14715 } 14716 14717 /** 14718 * Returns the bottom padding of this view. If there are inset and enabled 14719 * scrollbars, this value may include the space required to display the 14720 * scrollbars as well. 14721 * 14722 * @return the bottom padding in pixels 14723 */ 14724 public int getPaddingBottom() { 14725 return mPaddingBottom; 14726 } 14727 14728 /** 14729 * Returns the left padding of this view. If there are inset and enabled 14730 * scrollbars, this value may include the space required to display the 14731 * scrollbars as well. 14732 * 14733 * @return the left padding in pixels 14734 */ 14735 public int getPaddingLeft() { 14736 if (!isPaddingResolved()) { 14737 resolvePadding(); 14738 } 14739 return mPaddingLeft; 14740 } 14741 14742 /** 14743 * Returns the start padding of this view depending on its resolved layout direction. 14744 * If there are inset and enabled scrollbars, this value may include the space 14745 * required to display the scrollbars as well. 14746 * 14747 * @return the start padding in pixels 14748 */ 14749 public int getPaddingStart() { 14750 if (!isPaddingResolved()) { 14751 resolvePadding(); 14752 } 14753 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 14754 mPaddingRight : mPaddingLeft; 14755 } 14756 14757 /** 14758 * Returns the right padding of this view. If there are inset and enabled 14759 * scrollbars, this value may include the space required to display the 14760 * scrollbars as well. 14761 * 14762 * @return the right padding in pixels 14763 */ 14764 public int getPaddingRight() { 14765 if (!isPaddingResolved()) { 14766 resolvePadding(); 14767 } 14768 return mPaddingRight; 14769 } 14770 14771 /** 14772 * Returns the end padding of this view depending on its resolved layout direction. 14773 * If there are inset and enabled scrollbars, this value may include the space 14774 * required to display the scrollbars as well. 14775 * 14776 * @return the end padding in pixels 14777 */ 14778 public int getPaddingEnd() { 14779 if (!isPaddingResolved()) { 14780 resolvePadding(); 14781 } 14782 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 14783 mPaddingLeft : mPaddingRight; 14784 } 14785 14786 /** 14787 * Return if the padding as been set thru relative values 14788 * {@link #setPaddingRelative(int, int, int, int)} or thru 14789 * @attr ref android.R.styleable#View_paddingStart or 14790 * @attr ref android.R.styleable#View_paddingEnd 14791 * 14792 * @return true if the padding is relative or false if it is not. 14793 */ 14794 public boolean isPaddingRelative() { 14795 return (mUserPaddingStart != UNDEFINED_PADDING || mUserPaddingEnd != UNDEFINED_PADDING); 14796 } 14797 14798 Insets computeOpticalInsets() { 14799 return (mBackground == null) ? Insets.NONE : mBackground.getOpticalInsets(); 14800 } 14801 14802 /** 14803 * @hide 14804 */ 14805 public Insets getOpticalInsets() { 14806 if (mLayoutInsets == null) { 14807 mLayoutInsets = computeOpticalInsets(); 14808 } 14809 return mLayoutInsets; 14810 } 14811 14812 /** 14813 * Changes the selection state of this view. A view can be selected or not. 14814 * Note that selection is not the same as focus. Views are typically 14815 * selected in the context of an AdapterView like ListView or GridView; 14816 * the selected view is the view that is highlighted. 14817 * 14818 * @param selected true if the view must be selected, false otherwise 14819 */ 14820 public void setSelected(boolean selected) { 14821 if (((mPrivateFlags & PFLAG_SELECTED) != 0) != selected) { 14822 mPrivateFlags = (mPrivateFlags & ~PFLAG_SELECTED) | (selected ? PFLAG_SELECTED : 0); 14823 if (!selected) resetPressedState(); 14824 invalidate(true); 14825 refreshDrawableState(); 14826 dispatchSetSelected(selected); 14827 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 14828 notifyAccessibilityStateChanged(); 14829 } 14830 } 14831 } 14832 14833 /** 14834 * Dispatch setSelected to all of this View's children. 14835 * 14836 * @see #setSelected(boolean) 14837 * 14838 * @param selected The new selected state 14839 */ 14840 protected void dispatchSetSelected(boolean selected) { 14841 } 14842 14843 /** 14844 * Indicates the selection state of this view. 14845 * 14846 * @return true if the view is selected, false otherwise 14847 */ 14848 @ViewDebug.ExportedProperty 14849 public boolean isSelected() { 14850 return (mPrivateFlags & PFLAG_SELECTED) != 0; 14851 } 14852 14853 /** 14854 * Changes the activated state of this view. A view can be activated or not. 14855 * Note that activation is not the same as selection. Selection is 14856 * a transient property, representing the view (hierarchy) the user is 14857 * currently interacting with. Activation is a longer-term state that the 14858 * user can move views in and out of. For example, in a list view with 14859 * single or multiple selection enabled, the views in the current selection 14860 * set are activated. (Um, yeah, we are deeply sorry about the terminology 14861 * here.) The activated state is propagated down to children of the view it 14862 * is set on. 14863 * 14864 * @param activated true if the view must be activated, false otherwise 14865 */ 14866 public void setActivated(boolean activated) { 14867 if (((mPrivateFlags & PFLAG_ACTIVATED) != 0) != activated) { 14868 mPrivateFlags = (mPrivateFlags & ~PFLAG_ACTIVATED) | (activated ? PFLAG_ACTIVATED : 0); 14869 invalidate(true); 14870 refreshDrawableState(); 14871 dispatchSetActivated(activated); 14872 } 14873 } 14874 14875 /** 14876 * Dispatch setActivated to all of this View's children. 14877 * 14878 * @see #setActivated(boolean) 14879 * 14880 * @param activated The new activated state 14881 */ 14882 protected void dispatchSetActivated(boolean activated) { 14883 } 14884 14885 /** 14886 * Indicates the activation state of this view. 14887 * 14888 * @return true if the view is activated, false otherwise 14889 */ 14890 @ViewDebug.ExportedProperty 14891 public boolean isActivated() { 14892 return (mPrivateFlags & PFLAG_ACTIVATED) != 0; 14893 } 14894 14895 /** 14896 * Returns the ViewTreeObserver for this view's hierarchy. The view tree 14897 * observer can be used to get notifications when global events, like 14898 * layout, happen. 14899 * 14900 * The returned ViewTreeObserver observer is not guaranteed to remain 14901 * valid for the lifetime of this View. If the caller of this method keeps 14902 * a long-lived reference to ViewTreeObserver, it should always check for 14903 * the return value of {@link ViewTreeObserver#isAlive()}. 14904 * 14905 * @return The ViewTreeObserver for this view's hierarchy. 14906 */ 14907 public ViewTreeObserver getViewTreeObserver() { 14908 if (mAttachInfo != null) { 14909 return mAttachInfo.mTreeObserver; 14910 } 14911 if (mFloatingTreeObserver == null) { 14912 mFloatingTreeObserver = new ViewTreeObserver(); 14913 } 14914 return mFloatingTreeObserver; 14915 } 14916 14917 /** 14918 * <p>Finds the topmost view in the current view hierarchy.</p> 14919 * 14920 * @return the topmost view containing this view 14921 */ 14922 public View getRootView() { 14923 if (mAttachInfo != null) { 14924 final View v = mAttachInfo.mRootView; 14925 if (v != null) { 14926 return v; 14927 } 14928 } 14929 14930 View parent = this; 14931 14932 while (parent.mParent != null && parent.mParent instanceof View) { 14933 parent = (View) parent.mParent; 14934 } 14935 14936 return parent; 14937 } 14938 14939 /** 14940 * <p>Computes the coordinates of this view on the screen. The argument 14941 * must be an array of two integers. After the method returns, the array 14942 * contains the x and y location in that order.</p> 14943 * 14944 * @param location an array of two integers in which to hold the coordinates 14945 */ 14946 public void getLocationOnScreen(int[] location) { 14947 getLocationInWindow(location); 14948 14949 final AttachInfo info = mAttachInfo; 14950 if (info != null) { 14951 location[0] += info.mWindowLeft; 14952 location[1] += info.mWindowTop; 14953 } 14954 } 14955 14956 /** 14957 * <p>Computes the coordinates of this view in its window. The argument 14958 * must be an array of two integers. After the method returns, the array 14959 * contains the x and y location in that order.</p> 14960 * 14961 * @param location an array of two integers in which to hold the coordinates 14962 */ 14963 public void getLocationInWindow(int[] location) { 14964 if (location == null || location.length < 2) { 14965 throw new IllegalArgumentException("location must be an array of two integers"); 14966 } 14967 14968 if (mAttachInfo == null) { 14969 // When the view is not attached to a window, this method does not make sense 14970 location[0] = location[1] = 0; 14971 return; 14972 } 14973 14974 float[] position = mAttachInfo.mTmpTransformLocation; 14975 position[0] = position[1] = 0.0f; 14976 14977 if (!hasIdentityMatrix()) { 14978 getMatrix().mapPoints(position); 14979 } 14980 14981 position[0] += mLeft; 14982 position[1] += mTop; 14983 14984 ViewParent viewParent = mParent; 14985 while (viewParent instanceof View) { 14986 final View view = (View) viewParent; 14987 14988 position[0] -= view.mScrollX; 14989 position[1] -= view.mScrollY; 14990 14991 if (!view.hasIdentityMatrix()) { 14992 view.getMatrix().mapPoints(position); 14993 } 14994 14995 position[0] += view.mLeft; 14996 position[1] += view.mTop; 14997 14998 viewParent = view.mParent; 14999 } 15000 15001 if (viewParent instanceof ViewRootImpl) { 15002 // *cough* 15003 final ViewRootImpl vr = (ViewRootImpl) viewParent; 15004 position[1] -= vr.mCurScrollY; 15005 } 15006 15007 location[0] = (int) (position[0] + 0.5f); 15008 location[1] = (int) (position[1] + 0.5f); 15009 } 15010 15011 /** 15012 * {@hide} 15013 * @param id the id of the view to be found 15014 * @return the view of the specified id, null if cannot be found 15015 */ 15016 protected View findViewTraversal(int id) { 15017 if (id == mID) { 15018 return this; 15019 } 15020 return null; 15021 } 15022 15023 /** 15024 * {@hide} 15025 * @param tag the tag of the view to be found 15026 * @return the view of specified tag, null if cannot be found 15027 */ 15028 protected View findViewWithTagTraversal(Object tag) { 15029 if (tag != null && tag.equals(mTag)) { 15030 return this; 15031 } 15032 return null; 15033 } 15034 15035 /** 15036 * {@hide} 15037 * @param predicate The predicate to evaluate. 15038 * @param childToSkip If not null, ignores this child during the recursive traversal. 15039 * @return The first view that matches the predicate or null. 15040 */ 15041 protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 15042 if (predicate.apply(this)) { 15043 return this; 15044 } 15045 return null; 15046 } 15047 15048 /** 15049 * Look for a child view with the given id. If this view has the given 15050 * id, return this view. 15051 * 15052 * @param id The id to search for. 15053 * @return The view that has the given id in the hierarchy or null 15054 */ 15055 public final View findViewById(int id) { 15056 if (id < 0) { 15057 return null; 15058 } 15059 return findViewTraversal(id); 15060 } 15061 15062 /** 15063 * Finds a view by its unuque and stable accessibility id. 15064 * 15065 * @param accessibilityId The searched accessibility id. 15066 * @return The found view. 15067 */ 15068 final View findViewByAccessibilityId(int accessibilityId) { 15069 if (accessibilityId < 0) { 15070 return null; 15071 } 15072 return findViewByAccessibilityIdTraversal(accessibilityId); 15073 } 15074 15075 /** 15076 * Performs the traversal to find a view by its unuque and stable accessibility id. 15077 * 15078 * <strong>Note:</strong>This method does not stop at the root namespace 15079 * boundary since the user can touch the screen at an arbitrary location 15080 * potentially crossing the root namespace bounday which will send an 15081 * accessibility event to accessibility services and they should be able 15082 * to obtain the event source. Also accessibility ids are guaranteed to be 15083 * unique in the window. 15084 * 15085 * @param accessibilityId The accessibility id. 15086 * @return The found view. 15087 */ 15088 View findViewByAccessibilityIdTraversal(int accessibilityId) { 15089 if (getAccessibilityViewId() == accessibilityId) { 15090 return this; 15091 } 15092 return null; 15093 } 15094 15095 /** 15096 * Look for a child view with the given tag. If this view has the given 15097 * tag, return this view. 15098 * 15099 * @param tag The tag to search for, using "tag.equals(getTag())". 15100 * @return The View that has the given tag in the hierarchy or null 15101 */ 15102 public final View findViewWithTag(Object tag) { 15103 if (tag == null) { 15104 return null; 15105 } 15106 return findViewWithTagTraversal(tag); 15107 } 15108 15109 /** 15110 * {@hide} 15111 * Look for a child view that matches the specified predicate. 15112 * If this view matches the predicate, return this view. 15113 * 15114 * @param predicate The predicate to evaluate. 15115 * @return The first view that matches the predicate or null. 15116 */ 15117 public final View findViewByPredicate(Predicate<View> predicate) { 15118 return findViewByPredicateTraversal(predicate, null); 15119 } 15120 15121 /** 15122 * {@hide} 15123 * Look for a child view that matches the specified predicate, 15124 * starting with the specified view and its descendents and then 15125 * recusively searching the ancestors and siblings of that view 15126 * until this view is reached. 15127 * 15128 * This method is useful in cases where the predicate does not match 15129 * a single unique view (perhaps multiple views use the same id) 15130 * and we are trying to find the view that is "closest" in scope to the 15131 * starting view. 15132 * 15133 * @param start The view to start from. 15134 * @param predicate The predicate to evaluate. 15135 * @return The first view that matches the predicate or null. 15136 */ 15137 public final View findViewByPredicateInsideOut(View start, Predicate<View> predicate) { 15138 View childToSkip = null; 15139 for (;;) { 15140 View view = start.findViewByPredicateTraversal(predicate, childToSkip); 15141 if (view != null || start == this) { 15142 return view; 15143 } 15144 15145 ViewParent parent = start.getParent(); 15146 if (parent == null || !(parent instanceof View)) { 15147 return null; 15148 } 15149 15150 childToSkip = start; 15151 start = (View) parent; 15152 } 15153 } 15154 15155 /** 15156 * Sets the identifier for this view. The identifier does not have to be 15157 * unique in this view's hierarchy. The identifier should be a positive 15158 * number. 15159 * 15160 * @see #NO_ID 15161 * @see #getId() 15162 * @see #findViewById(int) 15163 * 15164 * @param id a number used to identify the view 15165 * 15166 * @attr ref android.R.styleable#View_id 15167 */ 15168 public void setId(int id) { 15169 mID = id; 15170 if (mID == View.NO_ID && mLabelForId != View.NO_ID) { 15171 mID = generateViewId(); 15172 } 15173 } 15174 15175 /** 15176 * {@hide} 15177 * 15178 * @param isRoot true if the view belongs to the root namespace, false 15179 * otherwise 15180 */ 15181 public void setIsRootNamespace(boolean isRoot) { 15182 if (isRoot) { 15183 mPrivateFlags |= PFLAG_IS_ROOT_NAMESPACE; 15184 } else { 15185 mPrivateFlags &= ~PFLAG_IS_ROOT_NAMESPACE; 15186 } 15187 } 15188 15189 /** 15190 * {@hide} 15191 * 15192 * @return true if the view belongs to the root namespace, false otherwise 15193 */ 15194 public boolean isRootNamespace() { 15195 return (mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0; 15196 } 15197 15198 /** 15199 * Returns this view's identifier. 15200 * 15201 * @return a positive integer used to identify the view or {@link #NO_ID} 15202 * if the view has no ID 15203 * 15204 * @see #setId(int) 15205 * @see #findViewById(int) 15206 * @attr ref android.R.styleable#View_id 15207 */ 15208 @ViewDebug.CapturedViewProperty 15209 public int getId() { 15210 return mID; 15211 } 15212 15213 /** 15214 * Returns this view's tag. 15215 * 15216 * @return the Object stored in this view as a tag 15217 * 15218 * @see #setTag(Object) 15219 * @see #getTag(int) 15220 */ 15221 @ViewDebug.ExportedProperty 15222 public Object getTag() { 15223 return mTag; 15224 } 15225 15226 /** 15227 * Sets the tag associated with this view. A tag can be used to mark 15228 * a view in its hierarchy and does not have to be unique within the 15229 * hierarchy. Tags can also be used to store data within a view without 15230 * resorting to another data structure. 15231 * 15232 * @param tag an Object to tag the view with 15233 * 15234 * @see #getTag() 15235 * @see #setTag(int, Object) 15236 */ 15237 public void setTag(final Object tag) { 15238 mTag = tag; 15239 } 15240 15241 /** 15242 * Returns the tag associated with this view and the specified key. 15243 * 15244 * @param key The key identifying the tag 15245 * 15246 * @return the Object stored in this view as a tag 15247 * 15248 * @see #setTag(int, Object) 15249 * @see #getTag() 15250 */ 15251 public Object getTag(int key) { 15252 if (mKeyedTags != null) return mKeyedTags.get(key); 15253 return null; 15254 } 15255 15256 /** 15257 * Sets a tag associated with this view and a key. A tag can be used 15258 * to mark a view in its hierarchy and does not have to be unique within 15259 * the hierarchy. Tags can also be used to store data within a view 15260 * without resorting to another data structure. 15261 * 15262 * The specified key should be an id declared in the resources of the 15263 * application to ensure it is unique (see the <a 15264 * href={@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). 15265 * Keys identified as belonging to 15266 * the Android framework or not associated with any package will cause 15267 * an {@link IllegalArgumentException} to be thrown. 15268 * 15269 * @param key The key identifying the tag 15270 * @param tag An Object to tag the view with 15271 * 15272 * @throws IllegalArgumentException If they specified key is not valid 15273 * 15274 * @see #setTag(Object) 15275 * @see #getTag(int) 15276 */ 15277 public void setTag(int key, final Object tag) { 15278 // If the package id is 0x00 or 0x01, it's either an undefined package 15279 // or a framework id 15280 if ((key >>> 24) < 2) { 15281 throw new IllegalArgumentException("The key must be an application-specific " 15282 + "resource id."); 15283 } 15284 15285 setKeyedTag(key, tag); 15286 } 15287 15288 /** 15289 * Variation of {@link #setTag(int, Object)} that enforces the key to be a 15290 * framework id. 15291 * 15292 * @hide 15293 */ 15294 public void setTagInternal(int key, Object tag) { 15295 if ((key >>> 24) != 0x1) { 15296 throw new IllegalArgumentException("The key must be a framework-specific " 15297 + "resource id."); 15298 } 15299 15300 setKeyedTag(key, tag); 15301 } 15302 15303 private void setKeyedTag(int key, Object tag) { 15304 if (mKeyedTags == null) { 15305 mKeyedTags = new SparseArray<Object>(); 15306 } 15307 15308 mKeyedTags.put(key, tag); 15309 } 15310 15311 /** 15312 * Prints information about this view in the log output, with the tag 15313 * {@link #VIEW_LOG_TAG}. 15314 * 15315 * @hide 15316 */ 15317 public void debug() { 15318 debug(0); 15319 } 15320 15321 /** 15322 * Prints information about this view in the log output, with the tag 15323 * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an 15324 * indentation defined by the <code>depth</code>. 15325 * 15326 * @param depth the indentation level 15327 * 15328 * @hide 15329 */ 15330 protected void debug(int depth) { 15331 String output = debugIndent(depth - 1); 15332 15333 output += "+ " + this; 15334 int id = getId(); 15335 if (id != -1) { 15336 output += " (id=" + id + ")"; 15337 } 15338 Object tag = getTag(); 15339 if (tag != null) { 15340 output += " (tag=" + tag + ")"; 15341 } 15342 Log.d(VIEW_LOG_TAG, output); 15343 15344 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 15345 output = debugIndent(depth) + " FOCUSED"; 15346 Log.d(VIEW_LOG_TAG, output); 15347 } 15348 15349 output = debugIndent(depth); 15350 output += "frame={" + mLeft + ", " + mTop + ", " + mRight 15351 + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY 15352 + "} "; 15353 Log.d(VIEW_LOG_TAG, output); 15354 15355 if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 15356 || mPaddingBottom != 0) { 15357 output = debugIndent(depth); 15358 output += "padding={" + mPaddingLeft + ", " + mPaddingTop 15359 + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; 15360 Log.d(VIEW_LOG_TAG, output); 15361 } 15362 15363 output = debugIndent(depth); 15364 output += "mMeasureWidth=" + mMeasuredWidth + 15365 " mMeasureHeight=" + mMeasuredHeight; 15366 Log.d(VIEW_LOG_TAG, output); 15367 15368 output = debugIndent(depth); 15369 if (mLayoutParams == null) { 15370 output += "BAD! no layout params"; 15371 } else { 15372 output = mLayoutParams.debug(output); 15373 } 15374 Log.d(VIEW_LOG_TAG, output); 15375 15376 output = debugIndent(depth); 15377 output += "flags={"; 15378 output += View.printFlags(mViewFlags); 15379 output += "}"; 15380 Log.d(VIEW_LOG_TAG, output); 15381 15382 output = debugIndent(depth); 15383 output += "privateFlags={"; 15384 output += View.printPrivateFlags(mPrivateFlags); 15385 output += "}"; 15386 Log.d(VIEW_LOG_TAG, output); 15387 } 15388 15389 /** 15390 * Creates a string of whitespaces used for indentation. 15391 * 15392 * @param depth the indentation level 15393 * @return a String containing (depth * 2 + 3) * 2 white spaces 15394 * 15395 * @hide 15396 */ 15397 protected static String debugIndent(int depth) { 15398 StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); 15399 for (int i = 0; i < (depth * 2) + 3; i++) { 15400 spaces.append(' ').append(' '); 15401 } 15402 return spaces.toString(); 15403 } 15404 15405 /** 15406 * <p>Return the offset of the widget's text baseline from the widget's top 15407 * boundary. If this widget does not support baseline alignment, this 15408 * method returns -1. </p> 15409 * 15410 * @return the offset of the baseline within the widget's bounds or -1 15411 * if baseline alignment is not supported 15412 */ 15413 @ViewDebug.ExportedProperty(category = "layout") 15414 public int getBaseline() { 15415 return -1; 15416 } 15417 15418 /** 15419 * Returns whether the view hierarchy is currently undergoing a layout pass. This 15420 * information is useful to avoid situations such as calling {@link #requestLayout()} during 15421 * a layout pass. 15422 * 15423 * @return whether the view hierarchy is currently undergoing a layout pass 15424 */ 15425 public boolean isInLayout() { 15426 ViewRootImpl viewRoot = getViewRootImpl(); 15427 return (viewRoot != null && viewRoot.isInLayout()); 15428 } 15429 15430 /** 15431 * Call this when something has changed which has invalidated the 15432 * layout of this view. This will schedule a layout pass of the view 15433 * tree. This should not be called while the view hierarchy is currently in a layout 15434 * pass ({@link #isInLayout()}. If layout is happening, the request may be honored at the 15435 * end of the current layout pass (and then layout will run again) or after the current 15436 * frame is drawn and the next layout occurs. 15437 * 15438 * <p>Subclasses which override this method should call the superclass method to 15439 * handle possible request-during-layout errors correctly.</p> 15440 */ 15441 public void requestLayout() { 15442 ViewRootImpl viewRoot = getViewRootImpl(); 15443 if (viewRoot != null && viewRoot.isInLayout()) { 15444 viewRoot.requestLayoutDuringLayout(this); 15445 return; 15446 } 15447 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 15448 mPrivateFlags |= PFLAG_INVALIDATED; 15449 15450 if (mParent != null && !mParent.isLayoutRequested()) { 15451 mParent.requestLayout(); 15452 } 15453 } 15454 15455 /** 15456 * Forces this view to be laid out during the next layout pass. 15457 * This method does not call requestLayout() or forceLayout() 15458 * on the parent. 15459 */ 15460 public void forceLayout() { 15461 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 15462 mPrivateFlags |= PFLAG_INVALIDATED; 15463 } 15464 15465 /** 15466 * <p> 15467 * This is called to find out how big a view should be. The parent 15468 * supplies constraint information in the width and height parameters. 15469 * </p> 15470 * 15471 * <p> 15472 * The actual measurement work of a view is performed in 15473 * {@link #onMeasure(int, int)}, called by this method. Therefore, only 15474 * {@link #onMeasure(int, int)} can and must be overridden by subclasses. 15475 * </p> 15476 * 15477 * 15478 * @param widthMeasureSpec Horizontal space requirements as imposed by the 15479 * parent 15480 * @param heightMeasureSpec Vertical space requirements as imposed by the 15481 * parent 15482 * 15483 * @see #onMeasure(int, int) 15484 */ 15485 public final void measure(int widthMeasureSpec, int heightMeasureSpec) { 15486 boolean optical = isLayoutModeOptical(this); 15487 if (optical != isLayoutModeOptical(mParent)) { 15488 Insets insets = getOpticalInsets(); 15489 int oWidth = insets.left + insets.right; 15490 int oHeight = insets.top + insets.bottom; 15491 widthMeasureSpec = MeasureSpec.adjust(widthMeasureSpec, optical ? -oWidth : oWidth); 15492 heightMeasureSpec = MeasureSpec.adjust(heightMeasureSpec, optical ? -oHeight : oHeight); 15493 } 15494 if ((mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT || 15495 widthMeasureSpec != mOldWidthMeasureSpec || 15496 heightMeasureSpec != mOldHeightMeasureSpec) { 15497 15498 // first clears the measured dimension flag 15499 mPrivateFlags &= ~PFLAG_MEASURED_DIMENSION_SET; 15500 15501 resolveRtlPropertiesIfNeeded(); 15502 15503 // measure ourselves, this should set the measured dimension flag back 15504 onMeasure(widthMeasureSpec, heightMeasureSpec); 15505 15506 // flag not set, setMeasuredDimension() was not invoked, we raise 15507 // an exception to warn the developer 15508 if ((mPrivateFlags & PFLAG_MEASURED_DIMENSION_SET) != PFLAG_MEASURED_DIMENSION_SET) { 15509 throw new IllegalStateException("onMeasure() did not set the" 15510 + " measured dimension by calling" 15511 + " setMeasuredDimension()"); 15512 } 15513 15514 mPrivateFlags |= PFLAG_LAYOUT_REQUIRED; 15515 } 15516 15517 mOldWidthMeasureSpec = widthMeasureSpec; 15518 mOldHeightMeasureSpec = heightMeasureSpec; 15519 } 15520 15521 /** 15522 * <p> 15523 * Measure the view and its content to determine the measured width and the 15524 * measured height. This method is invoked by {@link #measure(int, int)} and 15525 * should be overriden by subclasses to provide accurate and efficient 15526 * measurement of their contents. 15527 * </p> 15528 * 15529 * <p> 15530 * <strong>CONTRACT:</strong> When overriding this method, you 15531 * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the 15532 * measured width and height of this view. Failure to do so will trigger an 15533 * <code>IllegalStateException</code>, thrown by 15534 * {@link #measure(int, int)}. Calling the superclass' 15535 * {@link #onMeasure(int, int)} is a valid use. 15536 * </p> 15537 * 15538 * <p> 15539 * The base class implementation of measure defaults to the background size, 15540 * unless a larger size is allowed by the MeasureSpec. Subclasses should 15541 * override {@link #onMeasure(int, int)} to provide better measurements of 15542 * their content. 15543 * </p> 15544 * 15545 * <p> 15546 * If this method is overridden, it is the subclass's responsibility to make 15547 * sure the measured height and width are at least the view's minimum height 15548 * and width ({@link #getSuggestedMinimumHeight()} and 15549 * {@link #getSuggestedMinimumWidth()}). 15550 * </p> 15551 * 15552 * @param widthMeasureSpec horizontal space requirements as imposed by the parent. 15553 * The requirements are encoded with 15554 * {@link android.view.View.MeasureSpec}. 15555 * @param heightMeasureSpec vertical space requirements as imposed by the parent. 15556 * The requirements are encoded with 15557 * {@link android.view.View.MeasureSpec}. 15558 * 15559 * @see #getMeasuredWidth() 15560 * @see #getMeasuredHeight() 15561 * @see #setMeasuredDimension(int, int) 15562 * @see #getSuggestedMinimumHeight() 15563 * @see #getSuggestedMinimumWidth() 15564 * @see android.view.View.MeasureSpec#getMode(int) 15565 * @see android.view.View.MeasureSpec#getSize(int) 15566 */ 15567 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 15568 setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), 15569 getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); 15570 } 15571 15572 /** 15573 * <p>This mehod must be called by {@link #onMeasure(int, int)} to store the 15574 * measured width and measured height. Failing to do so will trigger an 15575 * exception at measurement time.</p> 15576 * 15577 * @param measuredWidth The measured width of this view. May be a complex 15578 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 15579 * {@link #MEASURED_STATE_TOO_SMALL}. 15580 * @param measuredHeight The measured height of this view. May be a complex 15581 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 15582 * {@link #MEASURED_STATE_TOO_SMALL}. 15583 */ 15584 protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { 15585 boolean optical = isLayoutModeOptical(this); 15586 if (optical != isLayoutModeOptical(mParent)) { 15587 Insets insets = getOpticalInsets(); 15588 int opticalWidth = insets.left + insets.right; 15589 int opticalHeight = insets.top + insets.bottom; 15590 15591 measuredWidth += optical ? opticalWidth : -opticalWidth; 15592 measuredHeight += optical ? opticalHeight : -opticalHeight; 15593 } 15594 mMeasuredWidth = measuredWidth; 15595 mMeasuredHeight = measuredHeight; 15596 15597 mPrivateFlags |= PFLAG_MEASURED_DIMENSION_SET; 15598 } 15599 15600 /** 15601 * Merge two states as returned by {@link #getMeasuredState()}. 15602 * @param curState The current state as returned from a view or the result 15603 * of combining multiple views. 15604 * @param newState The new view state to combine. 15605 * @return Returns a new integer reflecting the combination of the two 15606 * states. 15607 */ 15608 public static int combineMeasuredStates(int curState, int newState) { 15609 return curState | newState; 15610 } 15611 15612 /** 15613 * Version of {@link #resolveSizeAndState(int, int, int)} 15614 * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. 15615 */ 15616 public static int resolveSize(int size, int measureSpec) { 15617 return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; 15618 } 15619 15620 /** 15621 * Utility to reconcile a desired size and state, with constraints imposed 15622 * by a MeasureSpec. Will take the desired size, unless a different size 15623 * is imposed by the constraints. The returned value is a compound integer, 15624 * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and 15625 * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the resulting 15626 * size is smaller than the size the view wants to be. 15627 * 15628 * @param size How big the view wants to be 15629 * @param measureSpec Constraints imposed by the parent 15630 * @return Size information bit mask as defined by 15631 * {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 15632 */ 15633 public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { 15634 int result = size; 15635 int specMode = MeasureSpec.getMode(measureSpec); 15636 int specSize = MeasureSpec.getSize(measureSpec); 15637 switch (specMode) { 15638 case MeasureSpec.UNSPECIFIED: 15639 result = size; 15640 break; 15641 case MeasureSpec.AT_MOST: 15642 if (specSize < size) { 15643 result = specSize | MEASURED_STATE_TOO_SMALL; 15644 } else { 15645 result = size; 15646 } 15647 break; 15648 case MeasureSpec.EXACTLY: 15649 result = specSize; 15650 break; 15651 } 15652 return result | (childMeasuredState&MEASURED_STATE_MASK); 15653 } 15654 15655 /** 15656 * Utility to return a default size. Uses the supplied size if the 15657 * MeasureSpec imposed no constraints. Will get larger if allowed 15658 * by the MeasureSpec. 15659 * 15660 * @param size Default size for this view 15661 * @param measureSpec Constraints imposed by the parent 15662 * @return The size this view should be. 15663 */ 15664 public static int getDefaultSize(int size, int measureSpec) { 15665 int result = size; 15666 int specMode = MeasureSpec.getMode(measureSpec); 15667 int specSize = MeasureSpec.getSize(measureSpec); 15668 15669 switch (specMode) { 15670 case MeasureSpec.UNSPECIFIED: 15671 result = size; 15672 break; 15673 case MeasureSpec.AT_MOST: 15674 case MeasureSpec.EXACTLY: 15675 result = specSize; 15676 break; 15677 } 15678 return result; 15679 } 15680 15681 /** 15682 * Returns the suggested minimum height that the view should use. This 15683 * returns the maximum of the view's minimum height 15684 * and the background's minimum height 15685 * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). 15686 * <p> 15687 * When being used in {@link #onMeasure(int, int)}, the caller should still 15688 * ensure the returned height is within the requirements of the parent. 15689 * 15690 * @return The suggested minimum height of the view. 15691 */ 15692 protected int getSuggestedMinimumHeight() { 15693 return (mBackground == null) ? mMinHeight : max(mMinHeight, mBackground.getMinimumHeight()); 15694 15695 } 15696 15697 /** 15698 * Returns the suggested minimum width that the view should use. This 15699 * returns the maximum of the view's minimum width) 15700 * and the background's minimum width 15701 * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). 15702 * <p> 15703 * When being used in {@link #onMeasure(int, int)}, the caller should still 15704 * ensure the returned width is within the requirements of the parent. 15705 * 15706 * @return The suggested minimum width of the view. 15707 */ 15708 protected int getSuggestedMinimumWidth() { 15709 return (mBackground == null) ? mMinWidth : max(mMinWidth, mBackground.getMinimumWidth()); 15710 } 15711 15712 /** 15713 * Returns the minimum height of the view. 15714 * 15715 * @return the minimum height the view will try to be. 15716 * 15717 * @see #setMinimumHeight(int) 15718 * 15719 * @attr ref android.R.styleable#View_minHeight 15720 */ 15721 public int getMinimumHeight() { 15722 return mMinHeight; 15723 } 15724 15725 /** 15726 * Sets the minimum height of the view. It is not guaranteed the view will 15727 * be able to achieve this minimum height (for example, if its parent layout 15728 * constrains it with less available height). 15729 * 15730 * @param minHeight The minimum height the view will try to be. 15731 * 15732 * @see #getMinimumHeight() 15733 * 15734 * @attr ref android.R.styleable#View_minHeight 15735 */ 15736 public void setMinimumHeight(int minHeight) { 15737 mMinHeight = minHeight; 15738 requestLayout(); 15739 } 15740 15741 /** 15742 * Returns the minimum width of the view. 15743 * 15744 * @return the minimum width the view will try to be. 15745 * 15746 * @see #setMinimumWidth(int) 15747 * 15748 * @attr ref android.R.styleable#View_minWidth 15749 */ 15750 public int getMinimumWidth() { 15751 return mMinWidth; 15752 } 15753 15754 /** 15755 * Sets the minimum width of the view. It is not guaranteed the view will 15756 * be able to achieve this minimum width (for example, if its parent layout 15757 * constrains it with less available width). 15758 * 15759 * @param minWidth The minimum width the view will try to be. 15760 * 15761 * @see #getMinimumWidth() 15762 * 15763 * @attr ref android.R.styleable#View_minWidth 15764 */ 15765 public void setMinimumWidth(int minWidth) { 15766 mMinWidth = minWidth; 15767 requestLayout(); 15768 15769 } 15770 15771 /** 15772 * Get the animation currently associated with this view. 15773 * 15774 * @return The animation that is currently playing or 15775 * scheduled to play for this view. 15776 */ 15777 public Animation getAnimation() { 15778 return mCurrentAnimation; 15779 } 15780 15781 /** 15782 * Start the specified animation now. 15783 * 15784 * @param animation the animation to start now 15785 */ 15786 public void startAnimation(Animation animation) { 15787 animation.setStartTime(Animation.START_ON_FIRST_FRAME); 15788 setAnimation(animation); 15789 invalidateParentCaches(); 15790 invalidate(true); 15791 } 15792 15793 /** 15794 * Cancels any animations for this view. 15795 */ 15796 public void clearAnimation() { 15797 if (mCurrentAnimation != null) { 15798 mCurrentAnimation.detach(); 15799 } 15800 mCurrentAnimation = null; 15801 invalidateParentIfNeeded(); 15802 } 15803 15804 /** 15805 * Sets the next animation to play for this view. 15806 * If you want the animation to play immediately, use 15807 * {@link #startAnimation(android.view.animation.Animation)} instead. 15808 * This method provides allows fine-grained 15809 * control over the start time and invalidation, but you 15810 * must make sure that 1) the animation has a start time set, and 15811 * 2) the view's parent (which controls animations on its children) 15812 * will be invalidated when the animation is supposed to 15813 * start. 15814 * 15815 * @param animation The next animation, or null. 15816 */ 15817 public void setAnimation(Animation animation) { 15818 mCurrentAnimation = animation; 15819 15820 if (animation != null) { 15821 // If the screen is off assume the animation start time is now instead of 15822 // the next frame we draw. Keeping the START_ON_FIRST_FRAME start time 15823 // would cause the animation to start when the screen turns back on 15824 if (mAttachInfo != null && !mAttachInfo.mScreenOn && 15825 animation.getStartTime() == Animation.START_ON_FIRST_FRAME) { 15826 animation.setStartTime(AnimationUtils.currentAnimationTimeMillis()); 15827 } 15828 animation.reset(); 15829 } 15830 } 15831 15832 /** 15833 * Invoked by a parent ViewGroup to notify the start of the animation 15834 * currently associated with this view. If you override this method, 15835 * always call super.onAnimationStart(); 15836 * 15837 * @see #setAnimation(android.view.animation.Animation) 15838 * @see #getAnimation() 15839 */ 15840 protected void onAnimationStart() { 15841 mPrivateFlags |= PFLAG_ANIMATION_STARTED; 15842 } 15843 15844 /** 15845 * Invoked by a parent ViewGroup to notify the end of the animation 15846 * currently associated with this view. If you override this method, 15847 * always call super.onAnimationEnd(); 15848 * 15849 * @see #setAnimation(android.view.animation.Animation) 15850 * @see #getAnimation() 15851 */ 15852 protected void onAnimationEnd() { 15853 mPrivateFlags &= ~PFLAG_ANIMATION_STARTED; 15854 } 15855 15856 /** 15857 * Invoked if there is a Transform that involves alpha. Subclass that can 15858 * draw themselves with the specified alpha should return true, and then 15859 * respect that alpha when their onDraw() is called. If this returns false 15860 * then the view may be redirected to draw into an offscreen buffer to 15861 * fulfill the request, which will look fine, but may be slower than if the 15862 * subclass handles it internally. The default implementation returns false. 15863 * 15864 * @param alpha The alpha (0..255) to apply to the view's drawing 15865 * @return true if the view can draw with the specified alpha. 15866 */ 15867 protected boolean onSetAlpha(int alpha) { 15868 return false; 15869 } 15870 15871 /** 15872 * This is used by the RootView to perform an optimization when 15873 * the view hierarchy contains one or several SurfaceView. 15874 * SurfaceView is always considered transparent, but its children are not, 15875 * therefore all View objects remove themselves from the global transparent 15876 * region (passed as a parameter to this function). 15877 * 15878 * @param region The transparent region for this ViewAncestor (window). 15879 * 15880 * @return Returns true if the effective visibility of the view at this 15881 * point is opaque, regardless of the transparent region; returns false 15882 * if it is possible for underlying windows to be seen behind the view. 15883 * 15884 * {@hide} 15885 */ 15886 public boolean gatherTransparentRegion(Region region) { 15887 final AttachInfo attachInfo = mAttachInfo; 15888 if (region != null && attachInfo != null) { 15889 final int pflags = mPrivateFlags; 15890 if ((pflags & PFLAG_SKIP_DRAW) == 0) { 15891 // The SKIP_DRAW flag IS NOT set, so this view draws. We need to 15892 // remove it from the transparent region. 15893 final int[] location = attachInfo.mTransparentLocation; 15894 getLocationInWindow(location); 15895 region.op(location[0], location[1], location[0] + mRight - mLeft, 15896 location[1] + mBottom - mTop, Region.Op.DIFFERENCE); 15897 } else if ((pflags & PFLAG_ONLY_DRAWS_BACKGROUND) != 0 && mBackground != null) { 15898 // The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable 15899 // exists, so we remove the background drawable's non-transparent 15900 // parts from this transparent region. 15901 applyDrawableToTransparentRegion(mBackground, region); 15902 } 15903 } 15904 return true; 15905 } 15906 15907 /** 15908 * Play a sound effect for this view. 15909 * 15910 * <p>The framework will play sound effects for some built in actions, such as 15911 * clicking, but you may wish to play these effects in your widget, 15912 * for instance, for internal navigation. 15913 * 15914 * <p>The sound effect will only be played if sound effects are enabled by the user, and 15915 * {@link #isSoundEffectsEnabled()} is true. 15916 * 15917 * @param soundConstant One of the constants defined in {@link SoundEffectConstants} 15918 */ 15919 public void playSoundEffect(int soundConstant) { 15920 if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { 15921 return; 15922 } 15923 mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); 15924 } 15925 15926 /** 15927 * BZZZTT!!1! 15928 * 15929 * <p>Provide haptic feedback to the user for this view. 15930 * 15931 * <p>The framework will provide haptic feedback for some built in actions, 15932 * such as long presses, but you may wish to provide feedback for your 15933 * own widget. 15934 * 15935 * <p>The feedback will only be performed if 15936 * {@link #isHapticFeedbackEnabled()} is true. 15937 * 15938 * @param feedbackConstant One of the constants defined in 15939 * {@link HapticFeedbackConstants} 15940 */ 15941 public boolean performHapticFeedback(int feedbackConstant) { 15942 return performHapticFeedback(feedbackConstant, 0); 15943 } 15944 15945 /** 15946 * BZZZTT!!1! 15947 * 15948 * <p>Like {@link #performHapticFeedback(int)}, with additional options. 15949 * 15950 * @param feedbackConstant One of the constants defined in 15951 * {@link HapticFeedbackConstants} 15952 * @param flags Additional flags as per {@link HapticFeedbackConstants}. 15953 */ 15954 public boolean performHapticFeedback(int feedbackConstant, int flags) { 15955 if (mAttachInfo == null) { 15956 return false; 15957 } 15958 //noinspection SimplifiableIfStatement 15959 if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 15960 && !isHapticFeedbackEnabled()) { 15961 return false; 15962 } 15963 return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, 15964 (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); 15965 } 15966 15967 /** 15968 * Request that the visibility of the status bar or other screen/window 15969 * decorations be changed. 15970 * 15971 * <p>This method is used to put the over device UI into temporary modes 15972 * where the user's attention is focused more on the application content, 15973 * by dimming or hiding surrounding system affordances. This is typically 15974 * used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY 15975 * Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content 15976 * to be placed behind the action bar (and with these flags other system 15977 * affordances) so that smooth transitions between hiding and showing them 15978 * can be done. 15979 * 15980 * <p>Two representative examples of the use of system UI visibility is 15981 * implementing a content browsing application (like a magazine reader) 15982 * and a video playing application. 15983 * 15984 * <p>The first code shows a typical implementation of a View in a content 15985 * browsing application. In this implementation, the application goes 15986 * into a content-oriented mode by hiding the status bar and action bar, 15987 * and putting the navigation elements into lights out mode. The user can 15988 * then interact with content while in this mode. Such an application should 15989 * provide an easy way for the user to toggle out of the mode (such as to 15990 * check information in the status bar or access notifications). In the 15991 * implementation here, this is done simply by tapping on the content. 15992 * 15993 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java 15994 * content} 15995 * 15996 * <p>This second code sample shows a typical implementation of a View 15997 * in a video playing application. In this situation, while the video is 15998 * playing the application would like to go into a complete full-screen mode, 15999 * to use as much of the display as possible for the video. When in this state 16000 * the user can not interact with the application; the system intercepts 16001 * touching on the screen to pop the UI out of full screen mode. See 16002 * {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code. 16003 * 16004 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java 16005 * content} 16006 * 16007 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 16008 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 16009 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 16010 * and {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}. 16011 */ 16012 public void setSystemUiVisibility(int visibility) { 16013 if (visibility != mSystemUiVisibility) { 16014 mSystemUiVisibility = visibility; 16015 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 16016 mParent.recomputeViewAttributes(this); 16017 } 16018 } 16019 } 16020 16021 /** 16022 * Returns the last {@link #setSystemUiVisibility(int) that this view has requested. 16023 * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 16024 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 16025 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 16026 * and {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}. 16027 */ 16028 public int getSystemUiVisibility() { 16029 return mSystemUiVisibility; 16030 } 16031 16032 /** 16033 * Returns the current system UI visibility that is currently set for 16034 * the entire window. This is the combination of the 16035 * {@link #setSystemUiVisibility(int)} values supplied by all of the 16036 * views in the window. 16037 */ 16038 public int getWindowSystemUiVisibility() { 16039 return mAttachInfo != null ? mAttachInfo.mSystemUiVisibility : 0; 16040 } 16041 16042 /** 16043 * Override to find out when the window's requested system UI visibility 16044 * has changed, that is the value returned by {@link #getWindowSystemUiVisibility()}. 16045 * This is different from the callbacks recieved through 16046 * {@link #setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener)} 16047 * in that this is only telling you about the local request of the window, 16048 * not the actual values applied by the system. 16049 */ 16050 public void onWindowSystemUiVisibilityChanged(int visible) { 16051 } 16052 16053 /** 16054 * Dispatch callbacks to {@link #onWindowSystemUiVisibilityChanged(int)} down 16055 * the view hierarchy. 16056 */ 16057 public void dispatchWindowSystemUiVisiblityChanged(int visible) { 16058 onWindowSystemUiVisibilityChanged(visible); 16059 } 16060 16061 /** 16062 * Set a listener to receive callbacks when the visibility of the system bar changes. 16063 * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. 16064 */ 16065 public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { 16066 getListenerInfo().mOnSystemUiVisibilityChangeListener = l; 16067 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 16068 mParent.recomputeViewAttributes(this); 16069 } 16070 } 16071 16072 /** 16073 * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down 16074 * the view hierarchy. 16075 */ 16076 public void dispatchSystemUiVisibilityChanged(int visibility) { 16077 ListenerInfo li = mListenerInfo; 16078 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 16079 li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( 16080 visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); 16081 } 16082 } 16083 16084 boolean updateLocalSystemUiVisibility(int localValue, int localChanges) { 16085 int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); 16086 if (val != mSystemUiVisibility) { 16087 setSystemUiVisibility(val); 16088 return true; 16089 } 16090 return false; 16091 } 16092 16093 /** @hide */ 16094 public void setDisabledSystemUiVisibility(int flags) { 16095 if (mAttachInfo != null) { 16096 if (mAttachInfo.mDisabledSystemUiVisibility != flags) { 16097 mAttachInfo.mDisabledSystemUiVisibility = flags; 16098 if (mParent != null) { 16099 mParent.recomputeViewAttributes(this); 16100 } 16101 } 16102 } 16103 } 16104 16105 /** 16106 * Creates an image that the system displays during the drag and drop 16107 * operation. This is called a "drag shadow". The default implementation 16108 * for a DragShadowBuilder based on a View returns an image that has exactly the same 16109 * appearance as the given View. The default also positions the center of the drag shadow 16110 * directly under the touch point. If no View is provided (the constructor with no parameters 16111 * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and 16112 * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overriden, then the 16113 * default is an invisible drag shadow. 16114 * <p> 16115 * You are not required to use the View you provide to the constructor as the basis of the 16116 * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw 16117 * anything you want as the drag shadow. 16118 * </p> 16119 * <p> 16120 * You pass a DragShadowBuilder object to the system when you start the drag. The system 16121 * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the 16122 * size and position of the drag shadow. It uses this data to construct a 16123 * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} 16124 * so that your application can draw the shadow image in the Canvas. 16125 * </p> 16126 * 16127 * <div class="special reference"> 16128 * <h3>Developer Guides</h3> 16129 * <p>For a guide to implementing drag and drop features, read the 16130 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 16131 * </div> 16132 */ 16133 public static class DragShadowBuilder { 16134 private final WeakReference<View> mView; 16135 16136 /** 16137 * Constructs a shadow image builder based on a View. By default, the resulting drag 16138 * shadow will have the same appearance and dimensions as the View, with the touch point 16139 * over the center of the View. 16140 * @param view A View. Any View in scope can be used. 16141 */ 16142 public DragShadowBuilder(View view) { 16143 mView = new WeakReference<View>(view); 16144 } 16145 16146 /** 16147 * Construct a shadow builder object with no associated View. This 16148 * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} 16149 * and {@link #onDrawShadow(Canvas)} methods are also overridden in order 16150 * to supply the drag shadow's dimensions and appearance without 16151 * reference to any View object. If they are not overridden, then the result is an 16152 * invisible drag shadow. 16153 */ 16154 public DragShadowBuilder() { 16155 mView = new WeakReference<View>(null); 16156 } 16157 16158 /** 16159 * Returns the View object that had been passed to the 16160 * {@link #View.DragShadowBuilder(View)} 16161 * constructor. If that View parameter was {@code null} or if the 16162 * {@link #View.DragShadowBuilder()} 16163 * constructor was used to instantiate the builder object, this method will return 16164 * null. 16165 * 16166 * @return The View object associate with this builder object. 16167 */ 16168 @SuppressWarnings({"JavadocReference"}) 16169 final public View getView() { 16170 return mView.get(); 16171 } 16172 16173 /** 16174 * Provides the metrics for the shadow image. These include the dimensions of 16175 * the shadow image, and the point within that shadow that should 16176 * be centered under the touch location while dragging. 16177 * <p> 16178 * The default implementation sets the dimensions of the shadow to be the 16179 * same as the dimensions of the View itself and centers the shadow under 16180 * the touch point. 16181 * </p> 16182 * 16183 * @param shadowSize A {@link android.graphics.Point} containing the width and height 16184 * of the shadow image. Your application must set {@link android.graphics.Point#x} to the 16185 * desired width and must set {@link android.graphics.Point#y} to the desired height of the 16186 * image. 16187 * 16188 * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the 16189 * shadow image that should be underneath the touch point during the drag and drop 16190 * operation. Your application must set {@link android.graphics.Point#x} to the 16191 * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. 16192 */ 16193 public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 16194 final View view = mView.get(); 16195 if (view != null) { 16196 shadowSize.set(view.getWidth(), view.getHeight()); 16197 shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); 16198 } else { 16199 Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); 16200 } 16201 } 16202 16203 /** 16204 * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object 16205 * based on the dimensions it received from the 16206 * {@link #onProvideShadowMetrics(Point, Point)} callback. 16207 * 16208 * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. 16209 */ 16210 public void onDrawShadow(Canvas canvas) { 16211 final View view = mView.get(); 16212 if (view != null) { 16213 view.draw(canvas); 16214 } else { 16215 Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); 16216 } 16217 } 16218 } 16219 16220 /** 16221 * Starts a drag and drop operation. When your application calls this method, it passes a 16222 * {@link android.view.View.DragShadowBuilder} object to the system. The 16223 * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} 16224 * to get metrics for the drag shadow, and then calls the object's 16225 * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. 16226 * <p> 16227 * Once the system has the drag shadow, it begins the drag and drop operation by sending 16228 * drag events to all the View objects in your application that are currently visible. It does 16229 * this either by calling the View object's drag listener (an implementation of 16230 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the 16231 * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. 16232 * Both are passed a {@link android.view.DragEvent} object that has a 16233 * {@link android.view.DragEvent#getAction()} value of 16234 * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. 16235 * </p> 16236 * <p> 16237 * Your application can invoke startDrag() on any attached View object. The View object does not 16238 * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to 16239 * be related to the View the user selected for dragging. 16240 * </p> 16241 * @param data A {@link android.content.ClipData} object pointing to the data to be 16242 * transferred by the drag and drop operation. 16243 * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the 16244 * drag shadow. 16245 * @param myLocalState An {@link java.lang.Object} containing local data about the drag and 16246 * drop operation. This Object is put into every DragEvent object sent by the system during the 16247 * current drag. 16248 * <p> 16249 * myLocalState is a lightweight mechanism for the sending information from the dragged View 16250 * to the target Views. For example, it can contain flags that differentiate between a 16251 * a copy operation and a move operation. 16252 * </p> 16253 * @param flags Flags that control the drag and drop operation. No flags are currently defined, 16254 * so the parameter should be set to 0. 16255 * @return {@code true} if the method completes successfully, or 16256 * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to 16257 * do a drag, and so no drag operation is in progress. 16258 */ 16259 public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, 16260 Object myLocalState, int flags) { 16261 if (ViewDebug.DEBUG_DRAG) { 16262 Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); 16263 } 16264 boolean okay = false; 16265 16266 Point shadowSize = new Point(); 16267 Point shadowTouchPoint = new Point(); 16268 shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); 16269 16270 if ((shadowSize.x < 0) || (shadowSize.y < 0) || 16271 (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { 16272 throw new IllegalStateException("Drag shadow dimensions must not be negative"); 16273 } 16274 16275 if (ViewDebug.DEBUG_DRAG) { 16276 Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y 16277 + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); 16278 } 16279 Surface surface = new Surface(); 16280 try { 16281 IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, 16282 flags, shadowSize.x, shadowSize.y, surface); 16283 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token 16284 + " surface=" + surface); 16285 if (token != null) { 16286 Canvas canvas = surface.lockCanvas(null); 16287 try { 16288 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 16289 shadowBuilder.onDrawShadow(canvas); 16290 } finally { 16291 surface.unlockCanvasAndPost(canvas); 16292 } 16293 16294 final ViewRootImpl root = getViewRootImpl(); 16295 16296 // Cache the local state object for delivery with DragEvents 16297 root.setLocalDragState(myLocalState); 16298 16299 // repurpose 'shadowSize' for the last touch point 16300 root.getLastTouchPoint(shadowSize); 16301 16302 okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, 16303 shadowSize.x, shadowSize.y, 16304 shadowTouchPoint.x, shadowTouchPoint.y, data); 16305 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); 16306 16307 // Off and running! Release our local surface instance; the drag 16308 // shadow surface is now managed by the system process. 16309 surface.release(); 16310 } 16311 } catch (Exception e) { 16312 Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); 16313 surface.destroy(); 16314 } 16315 16316 return okay; 16317 } 16318 16319 /** 16320 * Handles drag events sent by the system following a call to 16321 * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. 16322 *<p> 16323 * When the system calls this method, it passes a 16324 * {@link android.view.DragEvent} object. A call to 16325 * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined 16326 * in DragEvent. The method uses these to determine what is happening in the drag and drop 16327 * operation. 16328 * @param event The {@link android.view.DragEvent} sent by the system. 16329 * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined 16330 * in DragEvent, indicating the type of drag event represented by this object. 16331 * @return {@code true} if the method was successful, otherwise {@code false}. 16332 * <p> 16333 * The method should return {@code true} in response to an action type of 16334 * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current 16335 * operation. 16336 * </p> 16337 * <p> 16338 * The method should also return {@code true} in response to an action type of 16339 * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or 16340 * {@code false} if it didn't. 16341 * </p> 16342 */ 16343 public boolean onDragEvent(DragEvent event) { 16344 return false; 16345 } 16346 16347 /** 16348 * Detects if this View is enabled and has a drag event listener. 16349 * If both are true, then it calls the drag event listener with the 16350 * {@link android.view.DragEvent} it received. If the drag event listener returns 16351 * {@code true}, then dispatchDragEvent() returns {@code true}. 16352 * <p> 16353 * For all other cases, the method calls the 16354 * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler 16355 * method and returns its result. 16356 * </p> 16357 * <p> 16358 * This ensures that a drag event is always consumed, even if the View does not have a drag 16359 * event listener. However, if the View has a listener and the listener returns true, then 16360 * onDragEvent() is not called. 16361 * </p> 16362 */ 16363 public boolean dispatchDragEvent(DragEvent event) { 16364 //noinspection SimplifiableIfStatement 16365 ListenerInfo li = mListenerInfo; 16366 if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 16367 && li.mOnDragListener.onDrag(this, event)) { 16368 return true; 16369 } 16370 return onDragEvent(event); 16371 } 16372 16373 boolean canAcceptDrag() { 16374 return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0; 16375 } 16376 16377 /** 16378 * This needs to be a better API (NOT ON VIEW) before it is exposed. If 16379 * it is ever exposed at all. 16380 * @hide 16381 */ 16382 public void onCloseSystemDialogs(String reason) { 16383 } 16384 16385 /** 16386 * Given a Drawable whose bounds have been set to draw into this view, 16387 * update a Region being computed for 16388 * {@link #gatherTransparentRegion(android.graphics.Region)} so 16389 * that any non-transparent parts of the Drawable are removed from the 16390 * given transparent region. 16391 * 16392 * @param dr The Drawable whose transparency is to be applied to the region. 16393 * @param region A Region holding the current transparency information, 16394 * where any parts of the region that are set are considered to be 16395 * transparent. On return, this region will be modified to have the 16396 * transparency information reduced by the corresponding parts of the 16397 * Drawable that are not transparent. 16398 * {@hide} 16399 */ 16400 public void applyDrawableToTransparentRegion(Drawable dr, Region region) { 16401 if (DBG) { 16402 Log.i("View", "Getting transparent region for: " + this); 16403 } 16404 final Region r = dr.getTransparentRegion(); 16405 final Rect db = dr.getBounds(); 16406 final AttachInfo attachInfo = mAttachInfo; 16407 if (r != null && attachInfo != null) { 16408 final int w = getRight()-getLeft(); 16409 final int h = getBottom()-getTop(); 16410 if (db.left > 0) { 16411 //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); 16412 r.op(0, 0, db.left, h, Region.Op.UNION); 16413 } 16414 if (db.right < w) { 16415 //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); 16416 r.op(db.right, 0, w, h, Region.Op.UNION); 16417 } 16418 if (db.top > 0) { 16419 //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); 16420 r.op(0, 0, w, db.top, Region.Op.UNION); 16421 } 16422 if (db.bottom < h) { 16423 //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); 16424 r.op(0, db.bottom, w, h, Region.Op.UNION); 16425 } 16426 final int[] location = attachInfo.mTransparentLocation; 16427 getLocationInWindow(location); 16428 r.translate(location[0], location[1]); 16429 region.op(r, Region.Op.INTERSECT); 16430 } else { 16431 region.op(db, Region.Op.DIFFERENCE); 16432 } 16433 } 16434 16435 private void checkForLongClick(int delayOffset) { 16436 if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { 16437 mHasPerformedLongPress = false; 16438 16439 if (mPendingCheckForLongPress == null) { 16440 mPendingCheckForLongPress = new CheckForLongPress(); 16441 } 16442 mPendingCheckForLongPress.rememberWindowAttachCount(); 16443 postDelayed(mPendingCheckForLongPress, 16444 ViewConfiguration.getLongPressTimeout() - delayOffset); 16445 } 16446 } 16447 16448 /** 16449 * Inflate a view from an XML resource. This convenience method wraps the {@link 16450 * LayoutInflater} class, which provides a full range of options for view inflation. 16451 * 16452 * @param context The Context object for your activity or application. 16453 * @param resource The resource ID to inflate 16454 * @param root A view group that will be the parent. Used to properly inflate the 16455 * layout_* parameters. 16456 * @see LayoutInflater 16457 */ 16458 public static View inflate(Context context, int resource, ViewGroup root) { 16459 LayoutInflater factory = LayoutInflater.from(context); 16460 return factory.inflate(resource, root); 16461 } 16462 16463 /** 16464 * Scroll the view with standard behavior for scrolling beyond the normal 16465 * content boundaries. Views that call this method should override 16466 * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the 16467 * results of an over-scroll operation. 16468 * 16469 * Views can use this method to handle any touch or fling-based scrolling. 16470 * 16471 * @param deltaX Change in X in pixels 16472 * @param deltaY Change in Y in pixels 16473 * @param scrollX Current X scroll value in pixels before applying deltaX 16474 * @param scrollY Current Y scroll value in pixels before applying deltaY 16475 * @param scrollRangeX Maximum content scroll range along the X axis 16476 * @param scrollRangeY Maximum content scroll range along the Y axis 16477 * @param maxOverScrollX Number of pixels to overscroll by in either direction 16478 * along the X axis. 16479 * @param maxOverScrollY Number of pixels to overscroll by in either direction 16480 * along the Y axis. 16481 * @param isTouchEvent true if this scroll operation is the result of a touch event. 16482 * @return true if scrolling was clamped to an over-scroll boundary along either 16483 * axis, false otherwise. 16484 */ 16485 @SuppressWarnings({"UnusedParameters"}) 16486 protected boolean overScrollBy(int deltaX, int deltaY, 16487 int scrollX, int scrollY, 16488 int scrollRangeX, int scrollRangeY, 16489 int maxOverScrollX, int maxOverScrollY, 16490 boolean isTouchEvent) { 16491 final int overScrollMode = mOverScrollMode; 16492 final boolean canScrollHorizontal = 16493 computeHorizontalScrollRange() > computeHorizontalScrollExtent(); 16494 final boolean canScrollVertical = 16495 computeVerticalScrollRange() > computeVerticalScrollExtent(); 16496 final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || 16497 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); 16498 final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || 16499 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); 16500 16501 int newScrollX = scrollX + deltaX; 16502 if (!overScrollHorizontal) { 16503 maxOverScrollX = 0; 16504 } 16505 16506 int newScrollY = scrollY + deltaY; 16507 if (!overScrollVertical) { 16508 maxOverScrollY = 0; 16509 } 16510 16511 // Clamp values if at the limits and record 16512 final int left = -maxOverScrollX; 16513 final int right = maxOverScrollX + scrollRangeX; 16514 final int top = -maxOverScrollY; 16515 final int bottom = maxOverScrollY + scrollRangeY; 16516 16517 boolean clampedX = false; 16518 if (newScrollX > right) { 16519 newScrollX = right; 16520 clampedX = true; 16521 } else if (newScrollX < left) { 16522 newScrollX = left; 16523 clampedX = true; 16524 } 16525 16526 boolean clampedY = false; 16527 if (newScrollY > bottom) { 16528 newScrollY = bottom; 16529 clampedY = true; 16530 } else if (newScrollY < top) { 16531 newScrollY = top; 16532 clampedY = true; 16533 } 16534 16535 onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); 16536 16537 return clampedX || clampedY; 16538 } 16539 16540 /** 16541 * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to 16542 * respond to the results of an over-scroll operation. 16543 * 16544 * @param scrollX New X scroll value in pixels 16545 * @param scrollY New Y scroll value in pixels 16546 * @param clampedX True if scrollX was clamped to an over-scroll boundary 16547 * @param clampedY True if scrollY was clamped to an over-scroll boundary 16548 */ 16549 protected void onOverScrolled(int scrollX, int scrollY, 16550 boolean clampedX, boolean clampedY) { 16551 // Intentionally empty. 16552 } 16553 16554 /** 16555 * Returns the over-scroll mode for this view. The result will be 16556 * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 16557 * (allow over-scrolling only if the view content is larger than the container), 16558 * or {@link #OVER_SCROLL_NEVER}. 16559 * 16560 * @return This view's over-scroll mode. 16561 */ 16562 public int getOverScrollMode() { 16563 return mOverScrollMode; 16564 } 16565 16566 /** 16567 * Set the over-scroll mode for this view. Valid over-scroll modes are 16568 * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 16569 * (allow over-scrolling only if the view content is larger than the container), 16570 * or {@link #OVER_SCROLL_NEVER}. 16571 * 16572 * Setting the over-scroll mode of a view will have an effect only if the 16573 * view is capable of scrolling. 16574 * 16575 * @param overScrollMode The new over-scroll mode for this view. 16576 */ 16577 public void setOverScrollMode(int overScrollMode) { 16578 if (overScrollMode != OVER_SCROLL_ALWAYS && 16579 overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && 16580 overScrollMode != OVER_SCROLL_NEVER) { 16581 throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); 16582 } 16583 mOverScrollMode = overScrollMode; 16584 } 16585 16586 /** 16587 * Gets a scale factor that determines the distance the view should scroll 16588 * vertically in response to {@link MotionEvent#ACTION_SCROLL}. 16589 * @return The vertical scroll scale factor. 16590 * @hide 16591 */ 16592 protected float getVerticalScrollFactor() { 16593 if (mVerticalScrollFactor == 0) { 16594 TypedValue outValue = new TypedValue(); 16595 if (!mContext.getTheme().resolveAttribute( 16596 com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { 16597 throw new IllegalStateException( 16598 "Expected theme to define listPreferredItemHeight."); 16599 } 16600 mVerticalScrollFactor = outValue.getDimension( 16601 mContext.getResources().getDisplayMetrics()); 16602 } 16603 return mVerticalScrollFactor; 16604 } 16605 16606 /** 16607 * Gets a scale factor that determines the distance the view should scroll 16608 * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. 16609 * @return The horizontal scroll scale factor. 16610 * @hide 16611 */ 16612 protected float getHorizontalScrollFactor() { 16613 // TODO: Should use something else. 16614 return getVerticalScrollFactor(); 16615 } 16616 16617 /** 16618 * Return the value specifying the text direction or policy that was set with 16619 * {@link #setTextDirection(int)}. 16620 * 16621 * @return the defined text direction. It can be one of: 16622 * 16623 * {@link #TEXT_DIRECTION_INHERIT}, 16624 * {@link #TEXT_DIRECTION_FIRST_STRONG} 16625 * {@link #TEXT_DIRECTION_ANY_RTL}, 16626 * {@link #TEXT_DIRECTION_LTR}, 16627 * {@link #TEXT_DIRECTION_RTL}, 16628 * {@link #TEXT_DIRECTION_LOCALE} 16629 * 16630 * @hide 16631 */ 16632 @ViewDebug.ExportedProperty(category = "text", mapping = { 16633 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 16634 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 16635 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 16636 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 16637 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 16638 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE") 16639 }) 16640 public int getRawTextDirection() { 16641 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_MASK) >> PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 16642 } 16643 16644 /** 16645 * Set the text direction. 16646 * 16647 * @param textDirection the direction to set. Should be one of: 16648 * 16649 * {@link #TEXT_DIRECTION_INHERIT}, 16650 * {@link #TEXT_DIRECTION_FIRST_STRONG} 16651 * {@link #TEXT_DIRECTION_ANY_RTL}, 16652 * {@link #TEXT_DIRECTION_LTR}, 16653 * {@link #TEXT_DIRECTION_RTL}, 16654 * {@link #TEXT_DIRECTION_LOCALE} 16655 * 16656 * Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution 16657 * proceeds up the parent chain of the view to get the value. If there is no parent, then it will 16658 * return the default {@link #TEXT_DIRECTION_FIRST_STRONG}. 16659 */ 16660 public void setTextDirection(int textDirection) { 16661 if (getRawTextDirection() != textDirection) { 16662 // Reset the current text direction and the resolved one 16663 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 16664 resetResolvedTextDirection(); 16665 // Set the new text direction 16666 mPrivateFlags2 |= ((textDirection << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) & PFLAG2_TEXT_DIRECTION_MASK); 16667 // Do resolution 16668 resolveTextDirection(); 16669 // Notify change 16670 onRtlPropertiesChanged(getLayoutDirection()); 16671 // Refresh 16672 requestLayout(); 16673 invalidate(true); 16674 } 16675 } 16676 16677 /** 16678 * Return the resolved text direction. 16679 * 16680 * @return the resolved text direction. Returns one of: 16681 * 16682 * {@link #TEXT_DIRECTION_FIRST_STRONG} 16683 * {@link #TEXT_DIRECTION_ANY_RTL}, 16684 * {@link #TEXT_DIRECTION_LTR}, 16685 * {@link #TEXT_DIRECTION_RTL}, 16686 * {@link #TEXT_DIRECTION_LOCALE} 16687 */ 16688 public int getTextDirection() { 16689 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED_MASK) >> PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 16690 } 16691 16692 /** 16693 * Resolve the text direction. 16694 * 16695 * @return true if resolution has been done, false otherwise. 16696 * 16697 * @hide 16698 */ 16699 public boolean resolveTextDirection() { 16700 // Reset any previous text direction resolution 16701 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 16702 16703 if (hasRtlSupport()) { 16704 // Set resolved text direction flag depending on text direction flag 16705 final int textDirection = getRawTextDirection(); 16706 switch(textDirection) { 16707 case TEXT_DIRECTION_INHERIT: 16708 if (!canResolveTextDirection()) { 16709 // We cannot do the resolution if there is no parent, so use the default one 16710 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 16711 // Resolution will need to happen again later 16712 return false; 16713 } 16714 16715 View parent = ((View) mParent); 16716 // Parent has not yet resolved, so we still return the default 16717 if (!parent.isTextDirectionResolved()) { 16718 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 16719 // Resolution will need to happen again later 16720 return false; 16721 } 16722 16723 // Set current resolved direction to the same value as the parent's one 16724 final int parentResolvedDirection = parent.getTextDirection(); 16725 switch (parentResolvedDirection) { 16726 case TEXT_DIRECTION_FIRST_STRONG: 16727 case TEXT_DIRECTION_ANY_RTL: 16728 case TEXT_DIRECTION_LTR: 16729 case TEXT_DIRECTION_RTL: 16730 case TEXT_DIRECTION_LOCALE: 16731 mPrivateFlags2 |= 16732 (parentResolvedDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 16733 break; 16734 default: 16735 // Default resolved direction is "first strong" heuristic 16736 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 16737 } 16738 break; 16739 case TEXT_DIRECTION_FIRST_STRONG: 16740 case TEXT_DIRECTION_ANY_RTL: 16741 case TEXT_DIRECTION_LTR: 16742 case TEXT_DIRECTION_RTL: 16743 case TEXT_DIRECTION_LOCALE: 16744 // Resolved direction is the same as text direction 16745 mPrivateFlags2 |= (textDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 16746 break; 16747 default: 16748 // Default resolved direction is "first strong" heuristic 16749 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 16750 } 16751 } else { 16752 // Default resolved direction is "first strong" heuristic 16753 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 16754 } 16755 16756 // Set to resolved 16757 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED; 16758 return true; 16759 } 16760 16761 /** 16762 * Check if text direction resolution can be done. 16763 * 16764 * @return true if text direction resolution can be done otherwise return false. 16765 */ 16766 private boolean canResolveTextDirection() { 16767 switch (getRawTextDirection()) { 16768 case TEXT_DIRECTION_INHERIT: 16769 return (mParent != null) && (mParent instanceof View) && 16770 ((View) mParent).canResolveTextDirection(); 16771 default: 16772 return true; 16773 } 16774 } 16775 16776 /** 16777 * Reset resolved text direction. Text direction will be resolved during a call to 16778 * {@link #onMeasure(int, int)}. 16779 * 16780 * @hide 16781 */ 16782 public void resetResolvedTextDirection() { 16783 // Reset any previous text direction resolution 16784 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 16785 // Set to default value 16786 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 16787 } 16788 16789 /** 16790 * @return true if text direction is inherited. 16791 * 16792 * @hide 16793 */ 16794 public boolean isTextDirectionInherited() { 16795 return (getRawTextDirection() == TEXT_DIRECTION_INHERIT); 16796 } 16797 16798 /** 16799 * @return true if text direction is resolved. 16800 */ 16801 private boolean isTextDirectionResolved() { 16802 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED) == PFLAG2_TEXT_DIRECTION_RESOLVED; 16803 } 16804 16805 /** 16806 * Return the value specifying the text alignment or policy that was set with 16807 * {@link #setTextAlignment(int)}. 16808 * 16809 * @return the defined text alignment. It can be one of: 16810 * 16811 * {@link #TEXT_ALIGNMENT_INHERIT}, 16812 * {@link #TEXT_ALIGNMENT_GRAVITY}, 16813 * {@link #TEXT_ALIGNMENT_CENTER}, 16814 * {@link #TEXT_ALIGNMENT_TEXT_START}, 16815 * {@link #TEXT_ALIGNMENT_TEXT_END}, 16816 * {@link #TEXT_ALIGNMENT_VIEW_START}, 16817 * {@link #TEXT_ALIGNMENT_VIEW_END} 16818 * 16819 * @hide 16820 */ 16821 @ViewDebug.ExportedProperty(category = "text", mapping = { 16822 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 16823 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 16824 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 16825 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 16826 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 16827 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 16828 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 16829 }) 16830 public int getRawTextAlignment() { 16831 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_MASK) >> PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 16832 } 16833 16834 /** 16835 * Set the text alignment. 16836 * 16837 * @param textAlignment The text alignment to set. Should be one of 16838 * 16839 * {@link #TEXT_ALIGNMENT_INHERIT}, 16840 * {@link #TEXT_ALIGNMENT_GRAVITY}, 16841 * {@link #TEXT_ALIGNMENT_CENTER}, 16842 * {@link #TEXT_ALIGNMENT_TEXT_START}, 16843 * {@link #TEXT_ALIGNMENT_TEXT_END}, 16844 * {@link #TEXT_ALIGNMENT_VIEW_START}, 16845 * {@link #TEXT_ALIGNMENT_VIEW_END} 16846 * 16847 * Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution 16848 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 16849 * will return the default {@link #TEXT_ALIGNMENT_GRAVITY}. 16850 * 16851 * @attr ref android.R.styleable#View_textAlignment 16852 */ 16853 public void setTextAlignment(int textAlignment) { 16854 if (textAlignment != getRawTextAlignment()) { 16855 // Reset the current and resolved text alignment 16856 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 16857 resetResolvedTextAlignment(); 16858 // Set the new text alignment 16859 mPrivateFlags2 |= 16860 ((textAlignment << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) & PFLAG2_TEXT_ALIGNMENT_MASK); 16861 // Do resolution 16862 resolveTextAlignment(); 16863 // Notify change 16864 onRtlPropertiesChanged(getLayoutDirection()); 16865 // Refresh 16866 requestLayout(); 16867 invalidate(true); 16868 } 16869 } 16870 16871 /** 16872 * Return the resolved text alignment. 16873 * 16874 * @return the resolved text alignment. Returns one of: 16875 * 16876 * {@link #TEXT_ALIGNMENT_GRAVITY}, 16877 * {@link #TEXT_ALIGNMENT_CENTER}, 16878 * {@link #TEXT_ALIGNMENT_TEXT_START}, 16879 * {@link #TEXT_ALIGNMENT_TEXT_END}, 16880 * {@link #TEXT_ALIGNMENT_VIEW_START}, 16881 * {@link #TEXT_ALIGNMENT_VIEW_END} 16882 */ 16883 @ViewDebug.ExportedProperty(category = "text", mapping = { 16884 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 16885 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 16886 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 16887 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 16888 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 16889 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 16890 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 16891 }) 16892 public int getTextAlignment() { 16893 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK) >> 16894 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 16895 } 16896 16897 /** 16898 * Resolve the text alignment. 16899 * 16900 * @return true if resolution has been done, false otherwise. 16901 * 16902 * @hide 16903 */ 16904 public boolean resolveTextAlignment() { 16905 // Reset any previous text alignment resolution 16906 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 16907 16908 if (hasRtlSupport()) { 16909 // Set resolved text alignment flag depending on text alignment flag 16910 final int textAlignment = getRawTextAlignment(); 16911 switch (textAlignment) { 16912 case TEXT_ALIGNMENT_INHERIT: 16913 // Check if we can resolve the text alignment 16914 if (!canResolveTextAlignment()) { 16915 // We cannot do the resolution if there is no parent so use the default 16916 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 16917 // Resolution will need to happen again later 16918 return false; 16919 } 16920 View parent = (View) mParent; 16921 16922 // Parent has not yet resolved, so we still return the default 16923 if (!parent.isTextAlignmentResolved()) { 16924 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 16925 // Resolution will need to happen again later 16926 return false; 16927 } 16928 16929 final int parentResolvedTextAlignment = parent.getTextAlignment(); 16930 switch (parentResolvedTextAlignment) { 16931 case TEXT_ALIGNMENT_GRAVITY: 16932 case TEXT_ALIGNMENT_TEXT_START: 16933 case TEXT_ALIGNMENT_TEXT_END: 16934 case TEXT_ALIGNMENT_CENTER: 16935 case TEXT_ALIGNMENT_VIEW_START: 16936 case TEXT_ALIGNMENT_VIEW_END: 16937 // Resolved text alignment is the same as the parent resolved 16938 // text alignment 16939 mPrivateFlags2 |= 16940 (parentResolvedTextAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 16941 break; 16942 default: 16943 // Use default resolved text alignment 16944 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 16945 } 16946 break; 16947 case TEXT_ALIGNMENT_GRAVITY: 16948 case TEXT_ALIGNMENT_TEXT_START: 16949 case TEXT_ALIGNMENT_TEXT_END: 16950 case TEXT_ALIGNMENT_CENTER: 16951 case TEXT_ALIGNMENT_VIEW_START: 16952 case TEXT_ALIGNMENT_VIEW_END: 16953 // Resolved text alignment is the same as text alignment 16954 mPrivateFlags2 |= (textAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 16955 break; 16956 default: 16957 // Use default resolved text alignment 16958 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 16959 } 16960 } else { 16961 // Use default resolved text alignment 16962 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 16963 } 16964 16965 // Set the resolved 16966 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED; 16967 return true; 16968 } 16969 16970 /** 16971 * Check if text alignment resolution can be done. 16972 * 16973 * @return true if text alignment resolution can be done otherwise return false. 16974 */ 16975 private boolean canResolveTextAlignment() { 16976 switch (getRawTextAlignment()) { 16977 case TEXT_DIRECTION_INHERIT: 16978 return (mParent != null) && (mParent instanceof View) && 16979 ((View) mParent).canResolveTextAlignment(); 16980 default: 16981 return true; 16982 } 16983 } 16984 16985 /** 16986 * Reset resolved text alignment. Text alignment will be resolved during a call to 16987 * {@link #onMeasure(int, int)}. 16988 * 16989 * @hide 16990 */ 16991 public void resetResolvedTextAlignment() { 16992 // Reset any previous text alignment resolution 16993 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 16994 // Set to default 16995 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 16996 } 16997 16998 /** 16999 * @return true if text alignment is inherited. 17000 * 17001 * @hide 17002 */ 17003 public boolean isTextAlignmentInherited() { 17004 return (getRawTextAlignment() == TEXT_ALIGNMENT_INHERIT); 17005 } 17006 17007 /** 17008 * @return true if text alignment is resolved. 17009 */ 17010 private boolean isTextAlignmentResolved() { 17011 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED) == PFLAG2_TEXT_ALIGNMENT_RESOLVED; 17012 } 17013 17014 /** 17015 * Generate a value suitable for use in {@link #setId(int)}. 17016 * This value will not collide with ID values generated at build time by aapt for R.id. 17017 * 17018 * @return a generated ID value 17019 */ 17020 public static int generateViewId() { 17021 for (;;) { 17022 final int result = sNextGeneratedId.get(); 17023 // aapt-generated IDs have the high byte nonzero; clamp to the range under that. 17024 int newValue = result + 1; 17025 if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. 17026 if (sNextGeneratedId.compareAndSet(result, newValue)) { 17027 return result; 17028 } 17029 } 17030 } 17031 17032 // 17033 // Properties 17034 // 17035 /** 17036 * A Property wrapper around the <code>alpha</code> functionality handled by the 17037 * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. 17038 */ 17039 public static final Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { 17040 @Override 17041 public void setValue(View object, float value) { 17042 object.setAlpha(value); 17043 } 17044 17045 @Override 17046 public Float get(View object) { 17047 return object.getAlpha(); 17048 } 17049 }; 17050 17051 /** 17052 * A Property wrapper around the <code>translationX</code> functionality handled by the 17053 * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. 17054 */ 17055 public static final Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { 17056 @Override 17057 public void setValue(View object, float value) { 17058 object.setTranslationX(value); 17059 } 17060 17061 @Override 17062 public Float get(View object) { 17063 return object.getTranslationX(); 17064 } 17065 }; 17066 17067 /** 17068 * A Property wrapper around the <code>translationY</code> functionality handled by the 17069 * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. 17070 */ 17071 public static final Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { 17072 @Override 17073 public void setValue(View object, float value) { 17074 object.setTranslationY(value); 17075 } 17076 17077 @Override 17078 public Float get(View object) { 17079 return object.getTranslationY(); 17080 } 17081 }; 17082 17083 /** 17084 * A Property wrapper around the <code>x</code> functionality handled by the 17085 * {@link View#setX(float)} and {@link View#getX()} methods. 17086 */ 17087 public static final Property<View, Float> X = new FloatProperty<View>("x") { 17088 @Override 17089 public void setValue(View object, float value) { 17090 object.setX(value); 17091 } 17092 17093 @Override 17094 public Float get(View object) { 17095 return object.getX(); 17096 } 17097 }; 17098 17099 /** 17100 * A Property wrapper around the <code>y</code> functionality handled by the 17101 * {@link View#setY(float)} and {@link View#getY()} methods. 17102 */ 17103 public static final Property<View, Float> Y = new FloatProperty<View>("y") { 17104 @Override 17105 public void setValue(View object, float value) { 17106 object.setY(value); 17107 } 17108 17109 @Override 17110 public Float get(View object) { 17111 return object.getY(); 17112 } 17113 }; 17114 17115 /** 17116 * A Property wrapper around the <code>rotation</code> functionality handled by the 17117 * {@link View#setRotation(float)} and {@link View#getRotation()} methods. 17118 */ 17119 public static final Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { 17120 @Override 17121 public void setValue(View object, float value) { 17122 object.setRotation(value); 17123 } 17124 17125 @Override 17126 public Float get(View object) { 17127 return object.getRotation(); 17128 } 17129 }; 17130 17131 /** 17132 * A Property wrapper around the <code>rotationX</code> functionality handled by the 17133 * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. 17134 */ 17135 public static final Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { 17136 @Override 17137 public void setValue(View object, float value) { 17138 object.setRotationX(value); 17139 } 17140 17141 @Override 17142 public Float get(View object) { 17143 return object.getRotationX(); 17144 } 17145 }; 17146 17147 /** 17148 * A Property wrapper around the <code>rotationY</code> functionality handled by the 17149 * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. 17150 */ 17151 public static final Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { 17152 @Override 17153 public void setValue(View object, float value) { 17154 object.setRotationY(value); 17155 } 17156 17157 @Override 17158 public Float get(View object) { 17159 return object.getRotationY(); 17160 } 17161 }; 17162 17163 /** 17164 * A Property wrapper around the <code>scaleX</code> functionality handled by the 17165 * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. 17166 */ 17167 public static final Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { 17168 @Override 17169 public void setValue(View object, float value) { 17170 object.setScaleX(value); 17171 } 17172 17173 @Override 17174 public Float get(View object) { 17175 return object.getScaleX(); 17176 } 17177 }; 17178 17179 /** 17180 * A Property wrapper around the <code>scaleY</code> functionality handled by the 17181 * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. 17182 */ 17183 public static final Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { 17184 @Override 17185 public void setValue(View object, float value) { 17186 object.setScaleY(value); 17187 } 17188 17189 @Override 17190 public Float get(View object) { 17191 return object.getScaleY(); 17192 } 17193 }; 17194 17195 /** 17196 * A MeasureSpec encapsulates the layout requirements passed from parent to child. 17197 * Each MeasureSpec represents a requirement for either the width or the height. 17198 * A MeasureSpec is comprised of a size and a mode. There are three possible 17199 * modes: 17200 * <dl> 17201 * <dt>UNSPECIFIED</dt> 17202 * <dd> 17203 * The parent has not imposed any constraint on the child. It can be whatever size 17204 * it wants. 17205 * </dd> 17206 * 17207 * <dt>EXACTLY</dt> 17208 * <dd> 17209 * The parent has determined an exact size for the child. The child is going to be 17210 * given those bounds regardless of how big it wants to be. 17211 * </dd> 17212 * 17213 * <dt>AT_MOST</dt> 17214 * <dd> 17215 * The child can be as large as it wants up to the specified size. 17216 * </dd> 17217 * </dl> 17218 * 17219 * MeasureSpecs are implemented as ints to reduce object allocation. This class 17220 * is provided to pack and unpack the <size, mode> tuple into the int. 17221 */ 17222 public static class MeasureSpec { 17223 private static final int MODE_SHIFT = 30; 17224 private static final int MODE_MASK = 0x3 << MODE_SHIFT; 17225 17226 /** 17227 * Measure specification mode: The parent has not imposed any constraint 17228 * on the child. It can be whatever size it wants. 17229 */ 17230 public static final int UNSPECIFIED = 0 << MODE_SHIFT; 17231 17232 /** 17233 * Measure specification mode: The parent has determined an exact size 17234 * for the child. The child is going to be given those bounds regardless 17235 * of how big it wants to be. 17236 */ 17237 public static final int EXACTLY = 1 << MODE_SHIFT; 17238 17239 /** 17240 * Measure specification mode: The child can be as large as it wants up 17241 * to the specified size. 17242 */ 17243 public static final int AT_MOST = 2 << MODE_SHIFT; 17244 17245 /** 17246 * Creates a measure specification based on the supplied size and mode. 17247 * 17248 * The mode must always be one of the following: 17249 * <ul> 17250 * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> 17251 * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> 17252 * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> 17253 * </ul> 17254 * 17255 * @param size the size of the measure specification 17256 * @param mode the mode of the measure specification 17257 * @return the measure specification based on size and mode 17258 */ 17259 public static int makeMeasureSpec(int size, int mode) { 17260 return (size & ~MODE_MASK) | (mode & MODE_MASK); 17261 } 17262 17263 /** 17264 * Extracts the mode from the supplied measure specification. 17265 * 17266 * @param measureSpec the measure specification to extract the mode from 17267 * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, 17268 * {@link android.view.View.MeasureSpec#AT_MOST} or 17269 * {@link android.view.View.MeasureSpec#EXACTLY} 17270 */ 17271 public static int getMode(int measureSpec) { 17272 return (measureSpec & MODE_MASK); 17273 } 17274 17275 /** 17276 * Extracts the size from the supplied measure specification. 17277 * 17278 * @param measureSpec the measure specification to extract the size from 17279 * @return the size in pixels defined in the supplied measure specification 17280 */ 17281 public static int getSize(int measureSpec) { 17282 return (measureSpec & ~MODE_MASK); 17283 } 17284 17285 static int adjust(int measureSpec, int delta) { 17286 return makeMeasureSpec(getSize(measureSpec + delta), getMode(measureSpec)); 17287 } 17288 17289 /** 17290 * Returns a String representation of the specified measure 17291 * specification. 17292 * 17293 * @param measureSpec the measure specification to convert to a String 17294 * @return a String with the following format: "MeasureSpec: MODE SIZE" 17295 */ 17296 public static String toString(int measureSpec) { 17297 int mode = getMode(measureSpec); 17298 int size = getSize(measureSpec); 17299 17300 StringBuilder sb = new StringBuilder("MeasureSpec: "); 17301 17302 if (mode == UNSPECIFIED) 17303 sb.append("UNSPECIFIED "); 17304 else if (mode == EXACTLY) 17305 sb.append("EXACTLY "); 17306 else if (mode == AT_MOST) 17307 sb.append("AT_MOST "); 17308 else 17309 sb.append(mode).append(" "); 17310 17311 sb.append(size); 17312 return sb.toString(); 17313 } 17314 } 17315 17316 class CheckForLongPress implements Runnable { 17317 17318 private int mOriginalWindowAttachCount; 17319 17320 public void run() { 17321 if (isPressed() && (mParent != null) 17322 && mOriginalWindowAttachCount == mWindowAttachCount) { 17323 if (performLongClick()) { 17324 mHasPerformedLongPress = true; 17325 } 17326 } 17327 } 17328 17329 public void rememberWindowAttachCount() { 17330 mOriginalWindowAttachCount = mWindowAttachCount; 17331 } 17332 } 17333 17334 private final class CheckForTap implements Runnable { 17335 public void run() { 17336 mPrivateFlags &= ~PFLAG_PREPRESSED; 17337 setPressed(true); 17338 checkForLongClick(ViewConfiguration.getTapTimeout()); 17339 } 17340 } 17341 17342 private final class PerformClick implements Runnable { 17343 public void run() { 17344 performClick(); 17345 } 17346 } 17347 17348 /** @hide */ 17349 public void hackTurnOffWindowResizeAnim(boolean off) { 17350 mAttachInfo.mTurnOffWindowResizeAnim = off; 17351 } 17352 17353 /** 17354 * This method returns a ViewPropertyAnimator object, which can be used to animate 17355 * specific properties on this View. 17356 * 17357 * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. 17358 */ 17359 public ViewPropertyAnimator animate() { 17360 if (mAnimator == null) { 17361 mAnimator = new ViewPropertyAnimator(this); 17362 } 17363 return mAnimator; 17364 } 17365 17366 /** 17367 * Interface definition for a callback to be invoked when a hardware key event is 17368 * dispatched to this view. The callback will be invoked before the key event is 17369 * given to the view. This is only useful for hardware keyboards; a software input 17370 * method has no obligation to trigger this listener. 17371 */ 17372 public interface OnKeyListener { 17373 /** 17374 * Called when a hardware key is dispatched to a view. This allows listeners to 17375 * get a chance to respond before the target view. 17376 * <p>Key presses in software keyboards will generally NOT trigger this method, 17377 * although some may elect to do so in some situations. Do not assume a 17378 * software input method has to be key-based; even if it is, it may use key presses 17379 * in a different way than you expect, so there is no way to reliably catch soft 17380 * input key presses. 17381 * 17382 * @param v The view the key has been dispatched to. 17383 * @param keyCode The code for the physical key that was pressed 17384 * @param event The KeyEvent object containing full information about 17385 * the event. 17386 * @return True if the listener has consumed the event, false otherwise. 17387 */ 17388 boolean onKey(View v, int keyCode, KeyEvent event); 17389 } 17390 17391 /** 17392 * Interface definition for a callback to be invoked when a touch event is 17393 * dispatched to this view. The callback will be invoked before the touch 17394 * event is given to the view. 17395 */ 17396 public interface OnTouchListener { 17397 /** 17398 * Called when a touch event is dispatched to a view. This allows listeners to 17399 * get a chance to respond before the target view. 17400 * 17401 * @param v The view the touch event has been dispatched to. 17402 * @param event The MotionEvent object containing full information about 17403 * the event. 17404 * @return True if the listener has consumed the event, false otherwise. 17405 */ 17406 boolean onTouch(View v, MotionEvent event); 17407 } 17408 17409 /** 17410 * Interface definition for a callback to be invoked when a hover event is 17411 * dispatched to this view. The callback will be invoked before the hover 17412 * event is given to the view. 17413 */ 17414 public interface OnHoverListener { 17415 /** 17416 * Called when a hover event is dispatched to a view. This allows listeners to 17417 * get a chance to respond before the target view. 17418 * 17419 * @param v The view the hover event has been dispatched to. 17420 * @param event The MotionEvent object containing full information about 17421 * the event. 17422 * @return True if the listener has consumed the event, false otherwise. 17423 */ 17424 boolean onHover(View v, MotionEvent event); 17425 } 17426 17427 /** 17428 * Interface definition for a callback to be invoked when a generic motion event is 17429 * dispatched to this view. The callback will be invoked before the generic motion 17430 * event is given to the view. 17431 */ 17432 public interface OnGenericMotionListener { 17433 /** 17434 * Called when a generic motion event is dispatched to a view. This allows listeners to 17435 * get a chance to respond before the target view. 17436 * 17437 * @param v The view the generic motion event has been dispatched to. 17438 * @param event The MotionEvent object containing full information about 17439 * the event. 17440 * @return True if the listener has consumed the event, false otherwise. 17441 */ 17442 boolean onGenericMotion(View v, MotionEvent event); 17443 } 17444 17445 /** 17446 * Interface definition for a callback to be invoked when a view has been clicked and held. 17447 */ 17448 public interface OnLongClickListener { 17449 /** 17450 * Called when a view has been clicked and held. 17451 * 17452 * @param v The view that was clicked and held. 17453 * 17454 * @return true if the callback consumed the long click, false otherwise. 17455 */ 17456 boolean onLongClick(View v); 17457 } 17458 17459 /** 17460 * Interface definition for a callback to be invoked when a drag is being dispatched 17461 * to this view. The callback will be invoked before the hosting view's own 17462 * onDrag(event) method. If the listener wants to fall back to the hosting view's 17463 * onDrag(event) behavior, it should return 'false' from this callback. 17464 * 17465 * <div class="special reference"> 17466 * <h3>Developer Guides</h3> 17467 * <p>For a guide to implementing drag and drop features, read the 17468 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 17469 * </div> 17470 */ 17471 public interface OnDragListener { 17472 /** 17473 * Called when a drag event is dispatched to a view. This allows listeners 17474 * to get a chance to override base View behavior. 17475 * 17476 * @param v The View that received the drag event. 17477 * @param event The {@link android.view.DragEvent} object for the drag event. 17478 * @return {@code true} if the drag event was handled successfully, or {@code false} 17479 * if the drag event was not handled. Note that {@code false} will trigger the View 17480 * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. 17481 */ 17482 boolean onDrag(View v, DragEvent event); 17483 } 17484 17485 /** 17486 * Interface definition for a callback to be invoked when the focus state of 17487 * a view changed. 17488 */ 17489 public interface OnFocusChangeListener { 17490 /** 17491 * Called when the focus state of a view has changed. 17492 * 17493 * @param v The view whose state has changed. 17494 * @param hasFocus The new focus state of v. 17495 */ 17496 void onFocusChange(View v, boolean hasFocus); 17497 } 17498 17499 /** 17500 * Interface definition for a callback to be invoked when a view is clicked. 17501 */ 17502 public interface OnClickListener { 17503 /** 17504 * Called when a view has been clicked. 17505 * 17506 * @param v The view that was clicked. 17507 */ 17508 void onClick(View v); 17509 } 17510 17511 /** 17512 * Interface definition for a callback to be invoked when the context menu 17513 * for this view is being built. 17514 */ 17515 public interface OnCreateContextMenuListener { 17516 /** 17517 * Called when the context menu for this view is being built. It is not 17518 * safe to hold onto the menu after this method returns. 17519 * 17520 * @param menu The context menu that is being built 17521 * @param v The view for which the context menu is being built 17522 * @param menuInfo Extra information about the item for which the 17523 * context menu should be shown. This information will vary 17524 * depending on the class of v. 17525 */ 17526 void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); 17527 } 17528 17529 /** 17530 * Interface definition for a callback to be invoked when the status bar changes 17531 * visibility. This reports <strong>global</strong> changes to the system UI 17532 * state, not what the application is requesting. 17533 * 17534 * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) 17535 */ 17536 public interface OnSystemUiVisibilityChangeListener { 17537 /** 17538 * Called when the status bar changes visibility because of a call to 17539 * {@link View#setSystemUiVisibility(int)}. 17540 * 17541 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 17542 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, and {@link #SYSTEM_UI_FLAG_FULLSCREEN}. 17543 * This tells you the <strong>global</strong> state of these UI visibility 17544 * flags, not what your app is currently applying. 17545 */ 17546 public void onSystemUiVisibilityChange(int visibility); 17547 } 17548 17549 /** 17550 * Interface definition for a callback to be invoked when this view is attached 17551 * or detached from its window. 17552 */ 17553 public interface OnAttachStateChangeListener { 17554 /** 17555 * Called when the view is attached to a window. 17556 * @param v The view that was attached 17557 */ 17558 public void onViewAttachedToWindow(View v); 17559 /** 17560 * Called when the view is detached from a window. 17561 * @param v The view that was detached 17562 */ 17563 public void onViewDetachedFromWindow(View v); 17564 } 17565 17566 private final class UnsetPressedState implements Runnable { 17567 public void run() { 17568 setPressed(false); 17569 } 17570 } 17571 17572 /** 17573 * Base class for derived classes that want to save and restore their own 17574 * state in {@link android.view.View#onSaveInstanceState()}. 17575 */ 17576 public static class BaseSavedState extends AbsSavedState { 17577 /** 17578 * Constructor used when reading from a parcel. Reads the state of the superclass. 17579 * 17580 * @param source 17581 */ 17582 public BaseSavedState(Parcel source) { 17583 super(source); 17584 } 17585 17586 /** 17587 * Constructor called by derived classes when creating their SavedState objects 17588 * 17589 * @param superState The state of the superclass of this view 17590 */ 17591 public BaseSavedState(Parcelable superState) { 17592 super(superState); 17593 } 17594 17595 public static final Parcelable.Creator<BaseSavedState> CREATOR = 17596 new Parcelable.Creator<BaseSavedState>() { 17597 public BaseSavedState createFromParcel(Parcel in) { 17598 return new BaseSavedState(in); 17599 } 17600 17601 public BaseSavedState[] newArray(int size) { 17602 return new BaseSavedState[size]; 17603 } 17604 }; 17605 } 17606 17607 /** 17608 * A set of information given to a view when it is attached to its parent 17609 * window. 17610 */ 17611 static class AttachInfo { 17612 interface Callbacks { 17613 void playSoundEffect(int effectId); 17614 boolean performHapticFeedback(int effectId, boolean always); 17615 } 17616 17617 /** 17618 * InvalidateInfo is used to post invalidate(int, int, int, int) messages 17619 * to a Handler. This class contains the target (View) to invalidate and 17620 * the coordinates of the dirty rectangle. 17621 * 17622 * For performance purposes, this class also implements a pool of up to 17623 * POOL_LIMIT objects that get reused. This reduces memory allocations 17624 * whenever possible. 17625 */ 17626 static class InvalidateInfo implements Poolable<InvalidateInfo> { 17627 private static final int POOL_LIMIT = 10; 17628 private static final Pool<InvalidateInfo> sPool = Pools.synchronizedPool( 17629 Pools.finitePool(new PoolableManager<InvalidateInfo>() { 17630 public InvalidateInfo newInstance() { 17631 return new InvalidateInfo(); 17632 } 17633 17634 public void onAcquired(InvalidateInfo element) { 17635 } 17636 17637 public void onReleased(InvalidateInfo element) { 17638 element.target = null; 17639 } 17640 }, POOL_LIMIT) 17641 ); 17642 17643 private InvalidateInfo mNext; 17644 private boolean mIsPooled; 17645 17646 View target; 17647 17648 int left; 17649 int top; 17650 int right; 17651 int bottom; 17652 17653 public void setNextPoolable(InvalidateInfo element) { 17654 mNext = element; 17655 } 17656 17657 public InvalidateInfo getNextPoolable() { 17658 return mNext; 17659 } 17660 17661 static InvalidateInfo acquire() { 17662 return sPool.acquire(); 17663 } 17664 17665 void release() { 17666 sPool.release(this); 17667 } 17668 17669 public boolean isPooled() { 17670 return mIsPooled; 17671 } 17672 17673 public void setPooled(boolean isPooled) { 17674 mIsPooled = isPooled; 17675 } 17676 } 17677 17678 final IWindowSession mSession; 17679 17680 final IWindow mWindow; 17681 17682 final IBinder mWindowToken; 17683 17684 final Display mDisplay; 17685 17686 final Callbacks mRootCallbacks; 17687 17688 HardwareCanvas mHardwareCanvas; 17689 17690 /** 17691 * The top view of the hierarchy. 17692 */ 17693 View mRootView; 17694 17695 IBinder mPanelParentWindowToken; 17696 Surface mSurface; 17697 17698 boolean mHardwareAccelerated; 17699 boolean mHardwareAccelerationRequested; 17700 HardwareRenderer mHardwareRenderer; 17701 17702 boolean mScreenOn; 17703 17704 /** 17705 * Scale factor used by the compatibility mode 17706 */ 17707 float mApplicationScale; 17708 17709 /** 17710 * Indicates whether the application is in compatibility mode 17711 */ 17712 boolean mScalingRequired; 17713 17714 /** 17715 * If set, ViewAncestor doesn't use its lame animation for when the window resizes. 17716 */ 17717 boolean mTurnOffWindowResizeAnim; 17718 17719 /** 17720 * Left position of this view's window 17721 */ 17722 int mWindowLeft; 17723 17724 /** 17725 * Top position of this view's window 17726 */ 17727 int mWindowTop; 17728 17729 /** 17730 * Indicates whether views need to use 32-bit drawing caches 17731 */ 17732 boolean mUse32BitDrawingCache; 17733 17734 /** 17735 * For windows that are full-screen but using insets to layout inside 17736 * of the screen decorations, these are the current insets for the 17737 * content of the window. 17738 */ 17739 final Rect mContentInsets = new Rect(); 17740 17741 /** 17742 * For windows that are full-screen but using insets to layout inside 17743 * of the screen decorations, these are the current insets for the 17744 * actual visible parts of the window. 17745 */ 17746 final Rect mVisibleInsets = new Rect(); 17747 17748 /** 17749 * The internal insets given by this window. This value is 17750 * supplied by the client (through 17751 * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will 17752 * be given to the window manager when changed to be used in laying 17753 * out windows behind it. 17754 */ 17755 final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets 17756 = new ViewTreeObserver.InternalInsetsInfo(); 17757 17758 /** 17759 * All views in the window's hierarchy that serve as scroll containers, 17760 * used to determine if the window can be resized or must be panned 17761 * to adjust for a soft input area. 17762 */ 17763 final ArrayList<View> mScrollContainers = new ArrayList<View>(); 17764 17765 final KeyEvent.DispatcherState mKeyDispatchState 17766 = new KeyEvent.DispatcherState(); 17767 17768 /** 17769 * Indicates whether the view's window currently has the focus. 17770 */ 17771 boolean mHasWindowFocus; 17772 17773 /** 17774 * The current visibility of the window. 17775 */ 17776 int mWindowVisibility; 17777 17778 /** 17779 * Indicates the time at which drawing started to occur. 17780 */ 17781 long mDrawingTime; 17782 17783 /** 17784 * Indicates whether or not ignoring the DIRTY_MASK flags. 17785 */ 17786 boolean mIgnoreDirtyState; 17787 17788 /** 17789 * This flag tracks when the mIgnoreDirtyState flag is set during draw(), 17790 * to avoid clearing that flag prematurely. 17791 */ 17792 boolean mSetIgnoreDirtyState = false; 17793 17794 /** 17795 * Indicates whether the view's window is currently in touch mode. 17796 */ 17797 boolean mInTouchMode; 17798 17799 /** 17800 * Indicates that ViewAncestor should trigger a global layout change 17801 * the next time it performs a traversal 17802 */ 17803 boolean mRecomputeGlobalAttributes; 17804 17805 /** 17806 * Always report new attributes at next traversal. 17807 */ 17808 boolean mForceReportNewAttributes; 17809 17810 /** 17811 * Set during a traveral if any views want to keep the screen on. 17812 */ 17813 boolean mKeepScreenOn; 17814 17815 /** 17816 * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). 17817 */ 17818 int mSystemUiVisibility; 17819 17820 /** 17821 * Hack to force certain system UI visibility flags to be cleared. 17822 */ 17823 int mDisabledSystemUiVisibility; 17824 17825 /** 17826 * Last global system UI visibility reported by the window manager. 17827 */ 17828 int mGlobalSystemUiVisibility; 17829 17830 /** 17831 * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener 17832 * attached. 17833 */ 17834 boolean mHasSystemUiListeners; 17835 17836 /** 17837 * Set if the visibility of any views has changed. 17838 */ 17839 boolean mViewVisibilityChanged; 17840 17841 /** 17842 * Set to true if a view has been scrolled. 17843 */ 17844 boolean mViewScrollChanged; 17845 17846 /** 17847 * Global to the view hierarchy used as a temporary for dealing with 17848 * x/y points in the transparent region computations. 17849 */ 17850 final int[] mTransparentLocation = new int[2]; 17851 17852 /** 17853 * Global to the view hierarchy used as a temporary for dealing with 17854 * x/y points in the ViewGroup.invalidateChild implementation. 17855 */ 17856 final int[] mInvalidateChildLocation = new int[2]; 17857 17858 17859 /** 17860 * Global to the view hierarchy used as a temporary for dealing with 17861 * x/y location when view is transformed. 17862 */ 17863 final float[] mTmpTransformLocation = new float[2]; 17864 17865 /** 17866 * The view tree observer used to dispatch global events like 17867 * layout, pre-draw, touch mode change, etc. 17868 */ 17869 final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); 17870 17871 /** 17872 * A Canvas used by the view hierarchy to perform bitmap caching. 17873 */ 17874 Canvas mCanvas; 17875 17876 /** 17877 * The view root impl. 17878 */ 17879 final ViewRootImpl mViewRootImpl; 17880 17881 /** 17882 * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This 17883 * handler can be used to pump events in the UI events queue. 17884 */ 17885 final Handler mHandler; 17886 17887 /** 17888 * Temporary for use in computing invalidate rectangles while 17889 * calling up the hierarchy. 17890 */ 17891 final Rect mTmpInvalRect = new Rect(); 17892 17893 /** 17894 * Temporary for use in computing hit areas with transformed views 17895 */ 17896 final RectF mTmpTransformRect = new RectF(); 17897 17898 /** 17899 * Temporary for use in transforming invalidation rect 17900 */ 17901 final Matrix mTmpMatrix = new Matrix(); 17902 17903 /** 17904 * Temporary for use in transforming invalidation rect 17905 */ 17906 final Transformation mTmpTransformation = new Transformation(); 17907 17908 /** 17909 * Temporary list for use in collecting focusable descendents of a view. 17910 */ 17911 final ArrayList<View> mTempArrayList = new ArrayList<View>(24); 17912 17913 /** 17914 * The id of the window for accessibility purposes. 17915 */ 17916 int mAccessibilityWindowId = View.NO_ID; 17917 17918 /** 17919 * Whether to ingore not exposed for accessibility Views when 17920 * reporting the view tree to accessibility services. 17921 */ 17922 boolean mIncludeNotImportantViews; 17923 17924 /** 17925 * The drawable for highlighting accessibility focus. 17926 */ 17927 Drawable mAccessibilityFocusDrawable; 17928 17929 /** 17930 * Show where the margins, bounds and layout bounds are for each view. 17931 */ 17932 boolean mDebugLayout = SystemProperties.getBoolean(DEBUG_LAYOUT_PROPERTY, false); 17933 17934 /** 17935 * Point used to compute visible regions. 17936 */ 17937 final Point mPoint = new Point(); 17938 17939 /** 17940 * Creates a new set of attachment information with the specified 17941 * events handler and thread. 17942 * 17943 * @param handler the events handler the view must use 17944 */ 17945 AttachInfo(IWindowSession session, IWindow window, Display display, 17946 ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { 17947 mSession = session; 17948 mWindow = window; 17949 mWindowToken = window.asBinder(); 17950 mDisplay = display; 17951 mViewRootImpl = viewRootImpl; 17952 mHandler = handler; 17953 mRootCallbacks = effectPlayer; 17954 } 17955 } 17956 17957 /** 17958 * <p>ScrollabilityCache holds various fields used by a View when scrolling 17959 * is supported. This avoids keeping too many unused fields in most 17960 * instances of View.</p> 17961 */ 17962 private static class ScrollabilityCache implements Runnable { 17963 17964 /** 17965 * Scrollbars are not visible 17966 */ 17967 public static final int OFF = 0; 17968 17969 /** 17970 * Scrollbars are visible 17971 */ 17972 public static final int ON = 1; 17973 17974 /** 17975 * Scrollbars are fading away 17976 */ 17977 public static final int FADING = 2; 17978 17979 public boolean fadeScrollBars; 17980 17981 public int fadingEdgeLength; 17982 public int scrollBarDefaultDelayBeforeFade; 17983 public int scrollBarFadeDuration; 17984 17985 public int scrollBarSize; 17986 public ScrollBarDrawable scrollBar; 17987 public float[] interpolatorValues; 17988 public View host; 17989 17990 public final Paint paint; 17991 public final Matrix matrix; 17992 public Shader shader; 17993 17994 public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); 17995 17996 private static final float[] OPAQUE = { 255 }; 17997 private static final float[] TRANSPARENT = { 0.0f }; 17998 17999 /** 18000 * When fading should start. This time moves into the future every time 18001 * a new scroll happens. Measured based on SystemClock.uptimeMillis() 18002 */ 18003 public long fadeStartTime; 18004 18005 18006 /** 18007 * The current state of the scrollbars: ON, OFF, or FADING 18008 */ 18009 public int state = OFF; 18010 18011 private int mLastColor; 18012 18013 public ScrollabilityCache(ViewConfiguration configuration, View host) { 18014 fadingEdgeLength = configuration.getScaledFadingEdgeLength(); 18015 scrollBarSize = configuration.getScaledScrollBarSize(); 18016 scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); 18017 scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); 18018 18019 paint = new Paint(); 18020 matrix = new Matrix(); 18021 // use use a height of 1, and then wack the matrix each time we 18022 // actually use it. 18023 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 18024 paint.setShader(shader); 18025 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 18026 18027 this.host = host; 18028 } 18029 18030 public void setFadeColor(int color) { 18031 if (color != mLastColor) { 18032 mLastColor = color; 18033 18034 if (color != 0) { 18035 shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, 18036 color & 0x00FFFFFF, Shader.TileMode.CLAMP); 18037 paint.setShader(shader); 18038 // Restore the default transfer mode (src_over) 18039 paint.setXfermode(null); 18040 } else { 18041 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 18042 paint.setShader(shader); 18043 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 18044 } 18045 } 18046 } 18047 18048 public void run() { 18049 long now = AnimationUtils.currentAnimationTimeMillis(); 18050 if (now >= fadeStartTime) { 18051 18052 // the animation fades the scrollbars out by changing 18053 // the opacity (alpha) from fully opaque to fully 18054 // transparent 18055 int nextFrame = (int) now; 18056 int framesCount = 0; 18057 18058 Interpolator interpolator = scrollBarInterpolator; 18059 18060 // Start opaque 18061 interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); 18062 18063 // End transparent 18064 nextFrame += scrollBarFadeDuration; 18065 interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); 18066 18067 state = FADING; 18068 18069 // Kick off the fade animation 18070 host.invalidate(true); 18071 } 18072 } 18073 } 18074 18075 /** 18076 * Resuable callback for sending 18077 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 18078 */ 18079 private class SendViewScrolledAccessibilityEvent implements Runnable { 18080 public volatile boolean mIsPending; 18081 18082 public void run() { 18083 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); 18084 mIsPending = false; 18085 } 18086 } 18087 18088 /** 18089 * <p> 18090 * This class represents a delegate that can be registered in a {@link View} 18091 * to enhance accessibility support via composition rather via inheritance. 18092 * It is specifically targeted to widget developers that extend basic View 18093 * classes i.e. classes in package android.view, that would like their 18094 * applications to be backwards compatible. 18095 * </p> 18096 * <div class="special reference"> 18097 * <h3>Developer Guides</h3> 18098 * <p>For more information about making applications accessible, read the 18099 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 18100 * developer guide.</p> 18101 * </div> 18102 * <p> 18103 * A scenario in which a developer would like to use an accessibility delegate 18104 * is overriding a method introduced in a later API version then the minimal API 18105 * version supported by the application. For example, the method 18106 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available 18107 * in API version 4 when the accessibility APIs were first introduced. If a 18108 * developer would like his application to run on API version 4 devices (assuming 18109 * all other APIs used by the application are version 4 or lower) and take advantage 18110 * of this method, instead of overriding the method which would break the application's 18111 * backwards compatibility, he can override the corresponding method in this 18112 * delegate and register the delegate in the target View if the API version of 18113 * the system is high enough i.e. the API version is same or higher to the API 18114 * version that introduced 18115 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. 18116 * </p> 18117 * <p> 18118 * Here is an example implementation: 18119 * </p> 18120 * <code><pre><p> 18121 * if (Build.VERSION.SDK_INT >= 14) { 18122 * // If the API version is equal of higher than the version in 18123 * // which onInitializeAccessibilityNodeInfo was introduced we 18124 * // register a delegate with a customized implementation. 18125 * View view = findViewById(R.id.view_id); 18126 * view.setAccessibilityDelegate(new AccessibilityDelegate() { 18127 * public void onInitializeAccessibilityNodeInfo(View host, 18128 * AccessibilityNodeInfo info) { 18129 * // Let the default implementation populate the info. 18130 * super.onInitializeAccessibilityNodeInfo(host, info); 18131 * // Set some other information. 18132 * info.setEnabled(host.isEnabled()); 18133 * } 18134 * }); 18135 * } 18136 * </code></pre></p> 18137 * <p> 18138 * This delegate contains methods that correspond to the accessibility methods 18139 * in View. If a delegate has been specified the implementation in View hands 18140 * off handling to the corresponding method in this delegate. The default 18141 * implementation the delegate methods behaves exactly as the corresponding 18142 * method in View for the case of no accessibility delegate been set. Hence, 18143 * to customize the behavior of a View method, clients can override only the 18144 * corresponding delegate method without altering the behavior of the rest 18145 * accessibility related methods of the host view. 18146 * </p> 18147 */ 18148 public static class AccessibilityDelegate { 18149 18150 /** 18151 * Sends an accessibility event of the given type. If accessibility is not 18152 * enabled this method has no effect. 18153 * <p> 18154 * The default implementation behaves as {@link View#sendAccessibilityEvent(int) 18155 * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate 18156 * been set. 18157 * </p> 18158 * 18159 * @param host The View hosting the delegate. 18160 * @param eventType The type of the event to send. 18161 * 18162 * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) 18163 */ 18164 public void sendAccessibilityEvent(View host, int eventType) { 18165 host.sendAccessibilityEventInternal(eventType); 18166 } 18167 18168 /** 18169 * Performs the specified accessibility action on the view. For 18170 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 18171 * <p> 18172 * The default implementation behaves as 18173 * {@link View#performAccessibilityAction(int, Bundle) 18174 * View#performAccessibilityAction(int, Bundle)} for the case of 18175 * no accessibility delegate been set. 18176 * </p> 18177 * 18178 * @param action The action to perform. 18179 * @return Whether the action was performed. 18180 * 18181 * @see View#performAccessibilityAction(int, Bundle) 18182 * View#performAccessibilityAction(int, Bundle) 18183 */ 18184 public boolean performAccessibilityAction(View host, int action, Bundle args) { 18185 return host.performAccessibilityActionInternal(action, args); 18186 } 18187 18188 /** 18189 * Sends an accessibility event. This method behaves exactly as 18190 * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an 18191 * empty {@link AccessibilityEvent} and does not perform a check whether 18192 * accessibility is enabled. 18193 * <p> 18194 * The default implementation behaves as 18195 * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) 18196 * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for 18197 * the case of no accessibility delegate been set. 18198 * </p> 18199 * 18200 * @param host The View hosting the delegate. 18201 * @param event The event to send. 18202 * 18203 * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) 18204 * View#sendAccessibilityEventUnchecked(AccessibilityEvent) 18205 */ 18206 public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { 18207 host.sendAccessibilityEventUncheckedInternal(event); 18208 } 18209 18210 /** 18211 * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then 18212 * to its children for adding their text content to the event. 18213 * <p> 18214 * The default implementation behaves as 18215 * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 18216 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for 18217 * the case of no accessibility delegate been set. 18218 * </p> 18219 * 18220 * @param host The View hosting the delegate. 18221 * @param event The event. 18222 * @return True if the event population was completed. 18223 * 18224 * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 18225 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 18226 */ 18227 public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 18228 return host.dispatchPopulateAccessibilityEventInternal(event); 18229 } 18230 18231 /** 18232 * Gives a chance to the host View to populate the accessibility event with its 18233 * text content. 18234 * <p> 18235 * The default implementation behaves as 18236 * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) 18237 * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for 18238 * the case of no accessibility delegate been set. 18239 * </p> 18240 * 18241 * @param host The View hosting the delegate. 18242 * @param event The accessibility event which to populate. 18243 * 18244 * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) 18245 * View#onPopulateAccessibilityEvent(AccessibilityEvent) 18246 */ 18247 public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 18248 host.onPopulateAccessibilityEventInternal(event); 18249 } 18250 18251 /** 18252 * Initializes an {@link AccessibilityEvent} with information about the 18253 * the host View which is the event source. 18254 * <p> 18255 * The default implementation behaves as 18256 * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) 18257 * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for 18258 * the case of no accessibility delegate been set. 18259 * </p> 18260 * 18261 * @param host The View hosting the delegate. 18262 * @param event The event to initialize. 18263 * 18264 * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) 18265 * View#onInitializeAccessibilityEvent(AccessibilityEvent) 18266 */ 18267 public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 18268 host.onInitializeAccessibilityEventInternal(event); 18269 } 18270 18271 /** 18272 * Initializes an {@link AccessibilityNodeInfo} with information about the host view. 18273 * <p> 18274 * The default implementation behaves as 18275 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 18276 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for 18277 * the case of no accessibility delegate been set. 18278 * </p> 18279 * 18280 * @param host The View hosting the delegate. 18281 * @param info The instance to initialize. 18282 * 18283 * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 18284 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 18285 */ 18286 public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { 18287 host.onInitializeAccessibilityNodeInfoInternal(info); 18288 } 18289 18290 /** 18291 * Called when a child of the host View has requested sending an 18292 * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) 18293 * to augment the event. 18294 * <p> 18295 * The default implementation behaves as 18296 * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 18297 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for 18298 * the case of no accessibility delegate been set. 18299 * </p> 18300 * 18301 * @param host The View hosting the delegate. 18302 * @param child The child which requests sending the event. 18303 * @param event The event to be sent. 18304 * @return True if the event should be sent 18305 * 18306 * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 18307 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 18308 */ 18309 public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, 18310 AccessibilityEvent event) { 18311 return host.onRequestSendAccessibilityEventInternal(child, event); 18312 } 18313 18314 /** 18315 * Gets the provider for managing a virtual view hierarchy rooted at this View 18316 * and reported to {@link android.accessibilityservice.AccessibilityService}s 18317 * that explore the window content. 18318 * <p> 18319 * The default implementation behaves as 18320 * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for 18321 * the case of no accessibility delegate been set. 18322 * </p> 18323 * 18324 * @return The provider. 18325 * 18326 * @see AccessibilityNodeProvider 18327 */ 18328 public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { 18329 return null; 18330 } 18331 } 18332 18333 private class MatchIdPredicate implements Predicate<View> { 18334 public int mId; 18335 18336 @Override 18337 public boolean apply(View view) { 18338 return (view.mID == mId); 18339 } 18340 } 18341 18342 private class MatchLabelForPredicate implements Predicate<View> { 18343 private int mLabeledId; 18344 18345 @Override 18346 public boolean apply(View view) { 18347 return (view.mLabelForId == mLabeledId); 18348 } 18349 } 18350 18351 /** 18352 * Dump all private flags in readable format, useful for documentation and 18353 * sanity checking. 18354 */ 18355 private static void dumpFlags() { 18356 final HashMap<String, String> found = Maps.newHashMap(); 18357 try { 18358 for (Field field : View.class.getDeclaredFields()) { 18359 final int modifiers = field.getModifiers(); 18360 if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) { 18361 if (field.getType().equals(int.class)) { 18362 final int value = field.getInt(null); 18363 dumpFlag(found, field.getName(), value); 18364 } else if (field.getType().equals(int[].class)) { 18365 final int[] values = (int[]) field.get(null); 18366 for (int i = 0; i < values.length; i++) { 18367 dumpFlag(found, field.getName() + "[" + i + "]", values[i]); 18368 } 18369 } 18370 } 18371 } 18372 } catch (IllegalAccessException e) { 18373 throw new RuntimeException(e); 18374 } 18375 18376 final ArrayList<String> keys = Lists.newArrayList(); 18377 keys.addAll(found.keySet()); 18378 Collections.sort(keys); 18379 for (String key : keys) { 18380 Log.d(VIEW_LOG_TAG, found.get(key)); 18381 } 18382 } 18383 18384 private static void dumpFlag(HashMap<String, String> found, String name, int value) { 18385 // Sort flags by prefix, then by bits, always keeping unique keys 18386 final String bits = String.format("%32s", Integer.toBinaryString(value)).replace('0', ' '); 18387 final int prefix = name.indexOf('_'); 18388 final String key = (prefix > 0 ? name.substring(0, prefix) : name) + bits + name; 18389 final String output = bits + " " + name; 18390 found.put(key, output); 18391 } 18392} 18393