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1 /*
2  * Copyright (C) 2011 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 
17 package com.android.server.wm;
18 
19 import static android.view.WindowManagerInternal.AppTransitionListener;
20 import static com.android.internal.R.styleable.WindowAnimation_activityCloseEnterAnimation;
21 import static com.android.internal.R.styleable.WindowAnimation_activityCloseExitAnimation;
22 import static com.android.internal.R.styleable.WindowAnimation_activityOpenEnterAnimation;
23 import static com.android.internal.R.styleable.WindowAnimation_activityOpenExitAnimation;
24 import static com.android.internal.R.styleable.WindowAnimation_launchTaskBehindSourceAnimation;
25 import static com.android.internal.R.styleable.WindowAnimation_launchTaskBehindTargetAnimation;
26 import static com.android.internal.R.styleable.WindowAnimation_taskCloseEnterAnimation;
27 import static com.android.internal.R.styleable.WindowAnimation_taskCloseExitAnimation;
28 import static com.android.internal.R.styleable.WindowAnimation_taskOpenEnterAnimation;
29 import static com.android.internal.R.styleable.WindowAnimation_taskOpenExitAnimation;
30 import static com.android.internal.R.styleable.WindowAnimation_taskToBackEnterAnimation;
31 import static com.android.internal.R.styleable.WindowAnimation_taskToBackExitAnimation;
32 import static com.android.internal.R.styleable.WindowAnimation_taskToFrontEnterAnimation;
33 import static com.android.internal.R.styleable.WindowAnimation_taskToFrontExitAnimation;
34 import static com.android.internal.R.styleable.WindowAnimation_wallpaperCloseEnterAnimation;
35 import static com.android.internal.R.styleable.WindowAnimation_wallpaperCloseExitAnimation;
36 import static com.android.internal.R.styleable.WindowAnimation_wallpaperIntraCloseEnterAnimation;
37 import static com.android.internal.R.styleable.WindowAnimation_wallpaperIntraCloseExitAnimation;
38 import static com.android.internal.R.styleable.WindowAnimation_wallpaperIntraOpenEnterAnimation;
39 import static com.android.internal.R.styleable.WindowAnimation_wallpaperIntraOpenExitAnimation;
40 import static com.android.internal.R.styleable.WindowAnimation_wallpaperOpenEnterAnimation;
41 import static com.android.internal.R.styleable.WindowAnimation_wallpaperOpenExitAnimation;
42 import static com.android.server.wm.AppWindowAnimator.PROLONG_ANIMATION_AT_START;
43 import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_ANIM;
44 import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_APP_TRANSITIONS;
45 import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME;
46 import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
47 import static com.android.server.wm.WindowStateAnimator.STACK_CLIP_NONE;
48 import static com.android.server.wm.WindowStateAnimator.STACK_CLIP_AFTER_ANIM;
49 
50 import android.annotation.Nullable;
51 import android.content.Context;
52 import android.content.res.Configuration;
53 import android.graphics.Bitmap;
54 import android.graphics.Path;
55 import android.graphics.Rect;
56 import android.os.Debug;
57 import android.os.IBinder;
58 import android.os.IRemoteCallback;
59 import android.os.RemoteException;
60 import android.util.ArraySet;
61 import android.util.Slog;
62 import android.util.SparseArray;
63 import android.view.AppTransitionAnimationSpec;
64 import android.view.IAppTransitionAnimationSpecsFuture;
65 import android.view.WindowManager;
66 import android.view.animation.AlphaAnimation;
67 import android.view.animation.Animation;
68 import android.view.animation.AnimationSet;
69 import android.view.animation.AnimationUtils;
70 import android.view.animation.ClipRectAnimation;
71 import android.view.animation.Interpolator;
72 import android.view.animation.PathInterpolator;
73 import android.view.animation.ScaleAnimation;
74 import android.view.animation.TranslateAnimation;
75 
76 import com.android.internal.util.DumpUtils.Dump;
77 import com.android.server.AttributeCache;
78 import com.android.server.wm.WindowManagerService.H;
79 import com.android.server.wm.animation.ClipRectLRAnimation;
80 import com.android.server.wm.animation.ClipRectTBAnimation;
81 import com.android.server.wm.animation.CurvedTranslateAnimation;
82 
83 import java.io.PrintWriter;
84 import java.util.ArrayList;
85 import java.util.concurrent.ExecutorService;
86 import java.util.concurrent.Executors;
87 
88 // State management of app transitions.  When we are preparing for a
89 // transition, mNextAppTransition will be the kind of transition to
90 // perform or TRANSIT_NONE if we are not waiting.  If we are waiting,
91 // mOpeningApps and mClosingApps are the lists of tokens that will be
92 // made visible or hidden at the next transition.
93 public class AppTransition implements Dump {
94     private static final String TAG = TAG_WITH_CLASS_NAME ? "AppTransition" : TAG_WM;
95     private static final int CLIP_REVEAL_TRANSLATION_Y_DP = 8;
96 
97     /** Not set up for a transition. */
98     public static final int TRANSIT_UNSET = -1;
99     /** No animation for transition. */
100     public static final int TRANSIT_NONE = 0;
101     /** A window in a new activity is being opened on top of an existing one in the same task. */
102     public static final int TRANSIT_ACTIVITY_OPEN = 6;
103     /** The window in the top-most activity is being closed to reveal the
104      * previous activity in the same task. */
105     public static final int TRANSIT_ACTIVITY_CLOSE = 7;
106     /** A window in a new task is being opened on top of an existing one
107      * in another activity's task. */
108     public static final int TRANSIT_TASK_OPEN = 8;
109     /** A window in the top-most activity is being closed to reveal the
110      * previous activity in a different task. */
111     public static final int TRANSIT_TASK_CLOSE = 9;
112     /** A window in an existing task is being displayed on top of an existing one
113      * in another activity's task. */
114     public static final int TRANSIT_TASK_TO_FRONT = 10;
115     /** A window in an existing task is being put below all other tasks. */
116     public static final int TRANSIT_TASK_TO_BACK = 11;
117     /** A window in a new activity that doesn't have a wallpaper is being opened on top of one that
118      * does, effectively closing the wallpaper. */
119     public static final int TRANSIT_WALLPAPER_CLOSE = 12;
120     /** A window in a new activity that does have a wallpaper is being opened on one that didn't,
121      * effectively opening the wallpaper. */
122     public static final int TRANSIT_WALLPAPER_OPEN = 13;
123     /** A window in a new activity is being opened on top of an existing one, and both are on top
124      * of the wallpaper. */
125     public static final int TRANSIT_WALLPAPER_INTRA_OPEN = 14;
126     /** The window in the top-most activity is being closed to reveal the previous activity, and
127      * both are on top of the wallpaper. */
128     public static final int TRANSIT_WALLPAPER_INTRA_CLOSE = 15;
129     /** A window in a new task is being opened behind an existing one in another activity's task.
130      * The new window will show briefly and then be gone. */
131     public static final int TRANSIT_TASK_OPEN_BEHIND = 16;
132     /** A window in a task is being animated in-place. */
133     public static final int TRANSIT_TASK_IN_PLACE = 17;
134     /** An activity is being relaunched (e.g. due to configuration change). */
135     public static final int TRANSIT_ACTIVITY_RELAUNCH = 18;
136     /** A task is being docked from recents. */
137     public static final int TRANSIT_DOCK_TASK_FROM_RECENTS = 19;
138 
139     /** Fraction of animation at which the recents thumbnail stays completely transparent */
140     private static final float RECENTS_THUMBNAIL_FADEIN_FRACTION = 0.5f;
141     /** Fraction of animation at which the recents thumbnail becomes completely transparent */
142     private static final float RECENTS_THUMBNAIL_FADEOUT_FRACTION = 0.5f;
143 
144     static final int DEFAULT_APP_TRANSITION_DURATION = 336;
145 
146     /** Interpolator to be used for animations that respond directly to a touch */
147     static final Interpolator TOUCH_RESPONSE_INTERPOLATOR =
148             new PathInterpolator(0.3f, 0f, 0.1f, 1f);
149 
150     private static final Interpolator THUMBNAIL_DOCK_INTERPOLATOR =
151             new PathInterpolator(0.85f, 0f, 1f, 1f);
152 
153     /**
154      * Maximum duration for the clip reveal animation. This is used when there is a lot of movement
155      * involved, to make it more understandable.
156      */
157     private static final int MAX_CLIP_REVEAL_TRANSITION_DURATION = 420;
158     private static final int THUMBNAIL_APP_TRANSITION_DURATION = 336;
159     private static final long APP_TRANSITION_TIMEOUT_MS = 5000;
160 
161     private final Context mContext;
162     private final WindowManagerService mService;
163 
164     private int mNextAppTransition = TRANSIT_UNSET;
165     private int mLastUsedAppTransition = TRANSIT_UNSET;
166     private String mLastOpeningApp;
167     private String mLastClosingApp;
168 
169     private static final int NEXT_TRANSIT_TYPE_NONE = 0;
170     private static final int NEXT_TRANSIT_TYPE_CUSTOM = 1;
171     private static final int NEXT_TRANSIT_TYPE_SCALE_UP = 2;
172     private static final int NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP = 3;
173     private static final int NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN = 4;
174     private static final int NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP = 5;
175     private static final int NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN = 6;
176     private static final int NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE = 7;
177     private static final int NEXT_TRANSIT_TYPE_CLIP_REVEAL = 8;
178     private int mNextAppTransitionType = NEXT_TRANSIT_TYPE_NONE;
179 
180     // These are the possible states for the enter/exit activities during a thumbnail transition
181     private static final int THUMBNAIL_TRANSITION_ENTER_SCALE_UP = 0;
182     private static final int THUMBNAIL_TRANSITION_EXIT_SCALE_UP = 1;
183     private static final int THUMBNAIL_TRANSITION_ENTER_SCALE_DOWN = 2;
184     private static final int THUMBNAIL_TRANSITION_EXIT_SCALE_DOWN = 3;
185 
186     private String mNextAppTransitionPackage;
187     // Used for thumbnail transitions. True if we're scaling up, false if scaling down
188     private boolean mNextAppTransitionScaleUp;
189     private IRemoteCallback mNextAppTransitionCallback;
190     private IRemoteCallback mNextAppTransitionFutureCallback;
191     private IRemoteCallback mAnimationFinishedCallback;
192     private int mNextAppTransitionEnter;
193     private int mNextAppTransitionExit;
194     private int mNextAppTransitionInPlace;
195 
196     // Keyed by task id.
197     private final SparseArray<AppTransitionAnimationSpec> mNextAppTransitionAnimationsSpecs
198             = new SparseArray<>();
199     private IAppTransitionAnimationSpecsFuture mNextAppTransitionAnimationsSpecsFuture;
200     private boolean mNextAppTransitionAnimationsSpecsPending;
201     private AppTransitionAnimationSpec mDefaultNextAppTransitionAnimationSpec;
202 
203     private Rect mNextAppTransitionInsets = new Rect();
204 
205     private Rect mTmpFromClipRect = new Rect();
206     private Rect mTmpToClipRect = new Rect();
207 
208     private final Rect mTmpRect = new Rect();
209 
210     private final static int APP_STATE_IDLE = 0;
211     private final static int APP_STATE_READY = 1;
212     private final static int APP_STATE_RUNNING = 2;
213     private final static int APP_STATE_TIMEOUT = 3;
214     private int mAppTransitionState = APP_STATE_IDLE;
215 
216     private final int mConfigShortAnimTime;
217     private final Interpolator mDecelerateInterpolator;
218     private final Interpolator mThumbnailFadeInInterpolator;
219     private final Interpolator mThumbnailFadeOutInterpolator;
220     private final Interpolator mLinearOutSlowInInterpolator;
221     private final Interpolator mFastOutLinearInInterpolator;
222     private final Interpolator mFastOutSlowInInterpolator;
223     private final Interpolator mClipHorizontalInterpolator = new PathInterpolator(0, 0, 0.4f, 1f);
224 
225     private final int mClipRevealTranslationY;
226 
227     private int mCurrentUserId = 0;
228     private long mLastClipRevealTransitionDuration = DEFAULT_APP_TRANSITION_DURATION;
229 
230     private final ArrayList<AppTransitionListener> mListeners = new ArrayList<>();
231     private final ExecutorService mDefaultExecutor = Executors.newSingleThreadExecutor();
232 
233     private int mLastClipRevealMaxTranslation;
234     private boolean mLastHadClipReveal;
235     private boolean mProlongedAnimationsEnded;
236 
AppTransition(Context context, WindowManagerService service)237     AppTransition(Context context, WindowManagerService service) {
238         mContext = context;
239         mService = service;
240         mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(context,
241                 com.android.internal.R.interpolator.linear_out_slow_in);
242         mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(context,
243                 com.android.internal.R.interpolator.fast_out_linear_in);
244         mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context,
245                 com.android.internal.R.interpolator.fast_out_slow_in);
246         mConfigShortAnimTime = context.getResources().getInteger(
247                 com.android.internal.R.integer.config_shortAnimTime);
248         mDecelerateInterpolator = AnimationUtils.loadInterpolator(context,
249                 com.android.internal.R.interpolator.decelerate_cubic);
250         mThumbnailFadeInInterpolator = new Interpolator() {
251             @Override
252             public float getInterpolation(float input) {
253                 // Linear response for first fraction, then complete after that.
254                 if (input < RECENTS_THUMBNAIL_FADEIN_FRACTION) {
255                     return 0f;
256                 }
257                 float t = (input - RECENTS_THUMBNAIL_FADEIN_FRACTION) /
258                         (1f - RECENTS_THUMBNAIL_FADEIN_FRACTION);
259                 return mFastOutLinearInInterpolator.getInterpolation(t);
260             }
261         };
262         mThumbnailFadeOutInterpolator = new Interpolator() {
263             @Override
264             public float getInterpolation(float input) {
265                 // Linear response for first fraction, then complete after that.
266                 if (input < RECENTS_THUMBNAIL_FADEOUT_FRACTION) {
267                     float t = input / RECENTS_THUMBNAIL_FADEOUT_FRACTION;
268                     return mLinearOutSlowInInterpolator.getInterpolation(t);
269                 }
270                 return 1f;
271             }
272         };
273         mClipRevealTranslationY = (int) (CLIP_REVEAL_TRANSLATION_Y_DP
274                 * mContext.getResources().getDisplayMetrics().density);
275     }
276 
isTransitionSet()277     boolean isTransitionSet() {
278         return mNextAppTransition != TRANSIT_UNSET;
279     }
280 
isTransitionEqual(int transit)281     boolean isTransitionEqual(int transit) {
282         return mNextAppTransition == transit;
283     }
284 
getAppTransition()285     int getAppTransition() {
286         return mNextAppTransition;
287      }
288 
setAppTransition(int transit)289     private void setAppTransition(int transit) {
290         mNextAppTransition = transit;
291         setLastAppTransition(TRANSIT_UNSET, null, null);
292     }
293 
setLastAppTransition(int transit, AppWindowToken openingApp, AppWindowToken closingApp)294     void setLastAppTransition(int transit, AppWindowToken openingApp, AppWindowToken closingApp) {
295         mLastUsedAppTransition = transit;
296         mLastOpeningApp = "" + openingApp;
297         mLastClosingApp = "" + closingApp;
298     }
299 
isReady()300     boolean isReady() {
301         return mAppTransitionState == APP_STATE_READY
302                 || mAppTransitionState == APP_STATE_TIMEOUT;
303     }
304 
setReady()305     void setReady() {
306         mAppTransitionState = APP_STATE_READY;
307         fetchAppTransitionSpecsFromFuture();
308     }
309 
isRunning()310     boolean isRunning() {
311         return mAppTransitionState == APP_STATE_RUNNING;
312     }
313 
setIdle()314     void setIdle() {
315         mAppTransitionState = APP_STATE_IDLE;
316     }
317 
isTimeout()318     boolean isTimeout() {
319         return mAppTransitionState == APP_STATE_TIMEOUT;
320     }
321 
setTimeout()322     void setTimeout() {
323         mAppTransitionState = APP_STATE_TIMEOUT;
324     }
325 
getAppTransitionThumbnailHeader(int taskId)326     Bitmap getAppTransitionThumbnailHeader(int taskId) {
327         AppTransitionAnimationSpec spec = mNextAppTransitionAnimationsSpecs.get(taskId);
328         if (spec == null) {
329             spec = mDefaultNextAppTransitionAnimationSpec;
330         }
331         return spec != null ? spec.bitmap : null;
332     }
333 
334     /** Returns whether the next thumbnail transition is aspect scaled up. */
isNextThumbnailTransitionAspectScaled()335     boolean isNextThumbnailTransitionAspectScaled() {
336         return mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP ||
337                 mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN;
338     }
339 
340     /** Returns whether the next thumbnail transition is scaling up. */
isNextThumbnailTransitionScaleUp()341     boolean isNextThumbnailTransitionScaleUp() {
342         return mNextAppTransitionScaleUp;
343     }
344 
isNextAppTransitionThumbnailUp()345     boolean isNextAppTransitionThumbnailUp() {
346         return mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP ||
347                 mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP;
348     }
349 
isNextAppTransitionThumbnailDown()350     boolean isNextAppTransitionThumbnailDown() {
351         return mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN ||
352                 mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN;
353     }
354 
355     /**
356      * @return true if and only if we are currently fetching app transition specs from the future
357      *         passed into {@link #overridePendingAppTransitionMultiThumbFuture}
358      */
isFetchingAppTransitionsSpecs()359     boolean isFetchingAppTransitionsSpecs() {
360         return mNextAppTransitionAnimationsSpecsPending;
361     }
362 
prepare()363     private boolean prepare() {
364         if (!isRunning()) {
365             mAppTransitionState = APP_STATE_IDLE;
366             notifyAppTransitionPendingLocked();
367             mLastHadClipReveal = false;
368             mLastClipRevealMaxTranslation = 0;
369             mLastClipRevealTransitionDuration = DEFAULT_APP_TRANSITION_DURATION;
370             return true;
371         }
372         return false;
373     }
374 
goodToGo(AppWindowAnimator topOpeningAppAnimator, AppWindowAnimator topClosingAppAnimator, ArraySet<AppWindowToken> openingApps, ArraySet<AppWindowToken> closingApps)375     void goodToGo(AppWindowAnimator topOpeningAppAnimator, AppWindowAnimator topClosingAppAnimator,
376             ArraySet<AppWindowToken> openingApps, ArraySet<AppWindowToken> closingApps) {
377         mNextAppTransition = TRANSIT_UNSET;
378         mAppTransitionState = APP_STATE_RUNNING;
379         notifyAppTransitionStartingLocked(
380                 topOpeningAppAnimator != null ? topOpeningAppAnimator.mAppToken.token : null,
381                 topClosingAppAnimator != null ? topClosingAppAnimator.mAppToken.token : null,
382                 topOpeningAppAnimator != null ? topOpeningAppAnimator.animation : null,
383                 topClosingAppAnimator != null ? topClosingAppAnimator.animation : null);
384         mService.getDefaultDisplayContentLocked().getDockedDividerController()
385                 .notifyAppTransitionStarting();
386 
387         // Prolong the start for the transition when docking a task from recents, unless recents
388         // ended it already then we don't need to wait.
389         if (mNextAppTransition == TRANSIT_DOCK_TASK_FROM_RECENTS && !mProlongedAnimationsEnded) {
390             for (int i = openingApps.size() - 1; i >= 0; i--) {
391                 final AppWindowAnimator appAnimator = openingApps.valueAt(i).mAppAnimator;
392                 appAnimator.startProlongAnimation(PROLONG_ANIMATION_AT_START);
393             }
394         }
395     }
396 
397     /**
398      * Let the transitions manager know that the somebody wanted to end the prolonged animations.
399      */
notifyProlongedAnimationsEnded()400     void notifyProlongedAnimationsEnded() {
401         mProlongedAnimationsEnded = true;
402     }
403 
clear()404     void clear() {
405         mNextAppTransitionType = NEXT_TRANSIT_TYPE_NONE;
406         mNextAppTransitionPackage = null;
407         mNextAppTransitionAnimationsSpecs.clear();
408         mNextAppTransitionAnimationsSpecsFuture = null;
409         mDefaultNextAppTransitionAnimationSpec = null;
410         mAnimationFinishedCallback = null;
411         mProlongedAnimationsEnded = false;
412     }
413 
freeze()414     void freeze() {
415         setAppTransition(AppTransition.TRANSIT_UNSET);
416         clear();
417         setReady();
418         notifyAppTransitionCancelledLocked();
419     }
420 
registerListenerLocked(AppTransitionListener listener)421     void registerListenerLocked(AppTransitionListener listener) {
422         mListeners.add(listener);
423     }
424 
notifyAppTransitionFinishedLocked(IBinder token)425     public void notifyAppTransitionFinishedLocked(IBinder token) {
426         for (int i = 0; i < mListeners.size(); i++) {
427             mListeners.get(i).onAppTransitionFinishedLocked(token);
428         }
429     }
430 
notifyAppTransitionPendingLocked()431     private void notifyAppTransitionPendingLocked() {
432         for (int i = 0; i < mListeners.size(); i++) {
433             mListeners.get(i).onAppTransitionPendingLocked();
434         }
435     }
436 
notifyAppTransitionCancelledLocked()437     private void notifyAppTransitionCancelledLocked() {
438         for (int i = 0; i < mListeners.size(); i++) {
439             mListeners.get(i).onAppTransitionCancelledLocked();
440         }
441     }
442 
notifyAppTransitionStartingLocked(IBinder openToken, IBinder closeToken, Animation openAnimation, Animation closeAnimation)443     private void notifyAppTransitionStartingLocked(IBinder openToken,
444             IBinder closeToken, Animation openAnimation, Animation closeAnimation) {
445         for (int i = 0; i < mListeners.size(); i++) {
446             mListeners.get(i).onAppTransitionStartingLocked(openToken, closeToken, openAnimation,
447                     closeAnimation);
448         }
449     }
450 
getCachedAnimations(WindowManager.LayoutParams lp)451     private AttributeCache.Entry getCachedAnimations(WindowManager.LayoutParams lp) {
452         if (DEBUG_ANIM) Slog.v(TAG, "Loading animations: layout params pkg="
453                 + (lp != null ? lp.packageName : null)
454                 + " resId=0x" + (lp != null ? Integer.toHexString(lp.windowAnimations) : null));
455         if (lp != null && lp.windowAnimations != 0) {
456             // If this is a system resource, don't try to load it from the
457             // application resources.  It is nice to avoid loading application
458             // resources if we can.
459             String packageName = lp.packageName != null ? lp.packageName : "android";
460             int resId = lp.windowAnimations;
461             if ((resId&0xFF000000) == 0x01000000) {
462                 packageName = "android";
463             }
464             if (DEBUG_ANIM) Slog.v(TAG, "Loading animations: picked package="
465                     + packageName);
466             return AttributeCache.instance().get(packageName, resId,
467                     com.android.internal.R.styleable.WindowAnimation, mCurrentUserId);
468         }
469         return null;
470     }
471 
getCachedAnimations(String packageName, int resId)472     private AttributeCache.Entry getCachedAnimations(String packageName, int resId) {
473         if (DEBUG_ANIM) Slog.v(TAG, "Loading animations: package="
474                 + packageName + " resId=0x" + Integer.toHexString(resId));
475         if (packageName != null) {
476             if ((resId&0xFF000000) == 0x01000000) {
477                 packageName = "android";
478             }
479             if (DEBUG_ANIM) Slog.v(TAG, "Loading animations: picked package="
480                     + packageName);
481             return AttributeCache.instance().get(packageName, resId,
482                     com.android.internal.R.styleable.WindowAnimation, mCurrentUserId);
483         }
484         return null;
485     }
486 
loadAnimationAttr(WindowManager.LayoutParams lp, int animAttr)487     Animation loadAnimationAttr(WindowManager.LayoutParams lp, int animAttr) {
488         int anim = 0;
489         Context context = mContext;
490         if (animAttr >= 0) {
491             AttributeCache.Entry ent = getCachedAnimations(lp);
492             if (ent != null) {
493                 context = ent.context;
494                 anim = ent.array.getResourceId(animAttr, 0);
495             }
496         }
497         if (anim != 0) {
498             return AnimationUtils.loadAnimation(context, anim);
499         }
500         return null;
501     }
502 
loadAnimationRes(WindowManager.LayoutParams lp, int resId)503     Animation loadAnimationRes(WindowManager.LayoutParams lp, int resId) {
504         Context context = mContext;
505         if (resId >= 0) {
506             AttributeCache.Entry ent = getCachedAnimations(lp);
507             if (ent != null) {
508                 context = ent.context;
509             }
510             return AnimationUtils.loadAnimation(context, resId);
511         }
512         return null;
513     }
514 
loadAnimationRes(String packageName, int resId)515     private Animation loadAnimationRes(String packageName, int resId) {
516         int anim = 0;
517         Context context = mContext;
518         if (resId >= 0) {
519             AttributeCache.Entry ent = getCachedAnimations(packageName, resId);
520             if (ent != null) {
521                 context = ent.context;
522                 anim = resId;
523             }
524         }
525         if (anim != 0) {
526             return AnimationUtils.loadAnimation(context, anim);
527         }
528         return null;
529     }
530 
531     /**
532      * Compute the pivot point for an animation that is scaling from a small
533      * rect on screen to a larger rect.  The pivot point varies depending on
534      * the distance between the inner and outer edges on both sides.  This
535      * function computes the pivot point for one dimension.
536      * @param startPos  Offset from left/top edge of outer rectangle to
537      * left/top edge of inner rectangle.
538      * @param finalScale The scaling factor between the size of the outer
539      * and inner rectangles.
540      */
computePivot(int startPos, float finalScale)541     private static float computePivot(int startPos, float finalScale) {
542 
543         /*
544         Theorem of intercepting lines:
545 
546           +      +   +-----------------------------------------------+
547           |      |   |                                               |
548           |      |   |                                               |
549           |      |   |                                               |
550           |      |   |                                               |
551         x |    y |   |                                               |
552           |      |   |                                               |
553           |      |   |                                               |
554           |      |   |                                               |
555           |      |   |                                               |
556           |      +   |             +--------------------+            |
557           |          |             |                    |            |
558           |          |             |                    |            |
559           |          |             |                    |            |
560           |          |             |                    |            |
561           |          |             |                    |            |
562           |          |             |                    |            |
563           |          |             |                    |            |
564           |          |             |                    |            |
565           |          |             |                    |            |
566           |          |             |                    |            |
567           |          |             |                    |            |
568           |          |             |                    |            |
569           |          |             |                    |            |
570           |          |             |                    |            |
571           |          |             |                    |            |
572           |          |             |                    |            |
573           |          |             |                    |            |
574           |          |             +--------------------+            |
575           |          |                                               |
576           |          |                                               |
577           |          |                                               |
578           |          |                                               |
579           |          |                                               |
580           |          |                                               |
581           |          |                                               |
582           |          +-----------------------------------------------+
583           |
584           |
585           |
586           |
587           |
588           |
589           |
590           |
591           |
592           +                                 ++
593                                          p  ++
594 
595         scale = (x - y) / x
596         <=> x = -y / (scale - 1)
597         */
598         final float denom = finalScale-1;
599         if (Math.abs(denom) < .0001f) {
600             return startPos;
601         }
602         return -startPos / denom;
603     }
604 
createScaleUpAnimationLocked(int transit, boolean enter, Rect containingFrame)605     private Animation createScaleUpAnimationLocked(int transit, boolean enter,
606             Rect containingFrame) {
607         Animation a;
608         getDefaultNextAppTransitionStartRect(mTmpRect);
609         final int appWidth = containingFrame.width();
610         final int appHeight = containingFrame.height();
611         if (enter) {
612             // Entering app zooms out from the center of the initial rect.
613             float scaleW = mTmpRect.width() / (float) appWidth;
614             float scaleH = mTmpRect.height() / (float) appHeight;
615             Animation scale = new ScaleAnimation(scaleW, 1, scaleH, 1,
616                     computePivot(mTmpRect.left, scaleW),
617                     computePivot(mTmpRect.top, scaleH));
618             scale.setInterpolator(mDecelerateInterpolator);
619 
620             Animation alpha = new AlphaAnimation(0, 1);
621             alpha.setInterpolator(mThumbnailFadeOutInterpolator);
622 
623             AnimationSet set = new AnimationSet(false);
624             set.addAnimation(scale);
625             set.addAnimation(alpha);
626             set.setDetachWallpaper(true);
627             a = set;
628         } else  if (transit == TRANSIT_WALLPAPER_INTRA_OPEN ||
629                     transit == TRANSIT_WALLPAPER_INTRA_CLOSE) {
630             // If we are on top of the wallpaper, we need an animation that
631             // correctly handles the wallpaper staying static behind all of
632             // the animated elements.  To do this, will just have the existing
633             // element fade out.
634             a = new AlphaAnimation(1, 0);
635             a.setDetachWallpaper(true);
636         } else {
637             // For normal animations, the exiting element just holds in place.
638             a = new AlphaAnimation(1, 1);
639         }
640 
641         // Pick the desired duration.  If this is an inter-activity transition,
642         // it  is the standard duration for that.  Otherwise we use the longer
643         // task transition duration.
644         final long duration;
645         switch (transit) {
646             case TRANSIT_ACTIVITY_OPEN:
647             case TRANSIT_ACTIVITY_CLOSE:
648                 duration = mConfigShortAnimTime;
649                 break;
650             default:
651                 duration = DEFAULT_APP_TRANSITION_DURATION;
652                 break;
653         }
654         a.setDuration(duration);
655         a.setFillAfter(true);
656         a.setInterpolator(mDecelerateInterpolator);
657         a.initialize(appWidth, appHeight, appWidth, appHeight);
658         return a;
659     }
660 
getDefaultNextAppTransitionStartRect(Rect rect)661     private void getDefaultNextAppTransitionStartRect(Rect rect) {
662         if (mDefaultNextAppTransitionAnimationSpec == null ||
663                 mDefaultNextAppTransitionAnimationSpec.rect == null) {
664             Slog.wtf(TAG, "Starting rect for app requested, but none available", new Throwable());
665             rect.setEmpty();
666         } else {
667             rect.set(mDefaultNextAppTransitionAnimationSpec.rect);
668         }
669     }
670 
getNextAppTransitionStartRect(int taskId, Rect rect)671     void getNextAppTransitionStartRect(int taskId, Rect rect) {
672         AppTransitionAnimationSpec spec = mNextAppTransitionAnimationsSpecs.get(taskId);
673         if (spec == null) {
674             spec = mDefaultNextAppTransitionAnimationSpec;
675         }
676         if (spec == null || spec.rect == null) {
677             Slog.wtf(TAG, "Starting rect for task: " + taskId + " requested, but not available",
678                     new Throwable());
679             rect.setEmpty();
680         } else {
681             rect.set(spec.rect);
682         }
683     }
684 
putDefaultNextAppTransitionCoordinates(int left, int top, int width, int height, Bitmap bitmap)685     private void putDefaultNextAppTransitionCoordinates(int left, int top, int width, int height,
686             Bitmap bitmap) {
687         mDefaultNextAppTransitionAnimationSpec = new AppTransitionAnimationSpec(-1 /* taskId */,
688                 bitmap, new Rect(left, top, left + width, top + height));
689     }
690 
691     /**
692      * @return the duration of the last clip reveal animation
693      */
getLastClipRevealTransitionDuration()694     long getLastClipRevealTransitionDuration() {
695         return mLastClipRevealTransitionDuration;
696     }
697 
698     /**
699      * @return the maximum distance the app surface is traveling of the last clip reveal animation
700      */
getLastClipRevealMaxTranslation()701     int getLastClipRevealMaxTranslation() {
702         return mLastClipRevealMaxTranslation;
703     }
704 
705     /**
706      * @return true if in the last app transition had a clip reveal animation, false otherwise
707      */
hadClipRevealAnimation()708     boolean hadClipRevealAnimation() {
709         return mLastHadClipReveal;
710     }
711 
712     /**
713      * Calculates the duration for the clip reveal animation. If the clip is "cut off", meaning that
714      * the start rect is outside of the target rect, and there is a lot of movement going on.
715      *
716      * @param cutOff whether the start rect was not fully contained by the end rect
717      * @param translationX the total translation the surface moves in x direction
718      * @param translationY the total translation the surfaces moves in y direction
719      * @param displayFrame our display frame
720      *
721      * @return the duration of the clip reveal animation, in milliseconds
722      */
calculateClipRevealTransitionDuration(boolean cutOff, float translationX, float translationY, Rect displayFrame)723     private long calculateClipRevealTransitionDuration(boolean cutOff, float translationX,
724             float translationY, Rect displayFrame) {
725         if (!cutOff) {
726             return DEFAULT_APP_TRANSITION_DURATION;
727         }
728         final float fraction = Math.max(Math.abs(translationX) / displayFrame.width(),
729                 Math.abs(translationY) / displayFrame.height());
730         return (long) (DEFAULT_APP_TRANSITION_DURATION + fraction *
731                 (MAX_CLIP_REVEAL_TRANSITION_DURATION - DEFAULT_APP_TRANSITION_DURATION));
732     }
733 
createClipRevealAnimationLocked(int transit, boolean enter, Rect appFrame, Rect displayFrame)734     private Animation createClipRevealAnimationLocked(int transit, boolean enter, Rect appFrame,
735             Rect displayFrame) {
736         final Animation anim;
737         if (enter) {
738             final int appWidth = appFrame.width();
739             final int appHeight = appFrame.height();
740 
741             // mTmpRect will contain an area around the launcher icon that was pressed. We will
742             // clip reveal from that area in the final area of the app.
743             getDefaultNextAppTransitionStartRect(mTmpRect);
744 
745             float t = 0f;
746             if (appHeight > 0) {
747                 t = (float) mTmpRect.top / displayFrame.height();
748             }
749             int translationY = mClipRevealTranslationY + (int)(displayFrame.height() / 7f * t);
750             int translationX = 0;
751             int translationYCorrection = translationY;
752             int centerX = mTmpRect.centerX();
753             int centerY = mTmpRect.centerY();
754             int halfWidth = mTmpRect.width() / 2;
755             int halfHeight = mTmpRect.height() / 2;
756             int clipStartX = centerX - halfWidth - appFrame.left;
757             int clipStartY = centerY - halfHeight - appFrame.top;
758             boolean cutOff = false;
759 
760             // If the starting rectangle is fully or partially outside of the target rectangle, we
761             // need to start the clipping at the edge and then achieve the rest with translation
762             // and extending the clip rect from that edge.
763             if (appFrame.top > centerY - halfHeight) {
764                 translationY = (centerY - halfHeight) - appFrame.top;
765                 translationYCorrection = 0;
766                 clipStartY = 0;
767                 cutOff = true;
768             }
769             if (appFrame.left > centerX - halfWidth) {
770                 translationX = (centerX - halfWidth) - appFrame.left;
771                 clipStartX = 0;
772                 cutOff = true;
773             }
774             if (appFrame.right < centerX + halfWidth) {
775                 translationX = (centerX + halfWidth) - appFrame.right;
776                 clipStartX = appWidth - mTmpRect.width();
777                 cutOff = true;
778             }
779             final long duration = calculateClipRevealTransitionDuration(cutOff, translationX,
780                     translationY, displayFrame);
781 
782             // Clip third of the from size of launch icon, expand to full width/height
783             Animation clipAnimLR = new ClipRectLRAnimation(
784                     clipStartX, clipStartX + mTmpRect.width(), 0, appWidth);
785             clipAnimLR.setInterpolator(mClipHorizontalInterpolator);
786             clipAnimLR.setDuration((long) (duration / 2.5f));
787 
788             TranslateAnimation translate = new TranslateAnimation(translationX, 0, translationY, 0);
789             translate.setInterpolator(cutOff ? TOUCH_RESPONSE_INTERPOLATOR
790                     : mLinearOutSlowInInterpolator);
791             translate.setDuration(duration);
792 
793             Animation clipAnimTB = new ClipRectTBAnimation(
794                     clipStartY, clipStartY + mTmpRect.height(),
795                     0, appHeight,
796                     translationYCorrection, 0,
797                     mLinearOutSlowInInterpolator);
798             clipAnimTB.setInterpolator(TOUCH_RESPONSE_INTERPOLATOR);
799             clipAnimTB.setDuration(duration);
800 
801             // Quick fade-in from icon to app window
802             final long alphaDuration = duration / 4;
803             AlphaAnimation alpha = new AlphaAnimation(0.5f, 1);
804             alpha.setDuration(alphaDuration);
805             alpha.setInterpolator(mLinearOutSlowInInterpolator);
806 
807             AnimationSet set = new AnimationSet(false);
808             set.addAnimation(clipAnimLR);
809             set.addAnimation(clipAnimTB);
810             set.addAnimation(translate);
811             set.addAnimation(alpha);
812             set.setZAdjustment(Animation.ZORDER_TOP);
813             set.initialize(appWidth, appHeight, appWidth, appHeight);
814             anim = set;
815             mLastHadClipReveal = true;
816             mLastClipRevealTransitionDuration = duration;
817 
818             // If the start rect was full inside the target rect (cutOff == false), we don't need
819             // to store the translation, because it's only used if cutOff == true.
820             mLastClipRevealMaxTranslation = cutOff
821                     ? Math.max(Math.abs(translationY), Math.abs(translationX)) : 0;
822         } else {
823             final long duration;
824             switch (transit) {
825                 case TRANSIT_ACTIVITY_OPEN:
826                 case TRANSIT_ACTIVITY_CLOSE:
827                     duration = mConfigShortAnimTime;
828                     break;
829                 default:
830                     duration = DEFAULT_APP_TRANSITION_DURATION;
831                     break;
832             }
833             if (transit == TRANSIT_WALLPAPER_INTRA_OPEN ||
834                     transit == TRANSIT_WALLPAPER_INTRA_CLOSE) {
835                 // If we are on top of the wallpaper, we need an animation that
836                 // correctly handles the wallpaper staying static behind all of
837                 // the animated elements.  To do this, will just have the existing
838                 // element fade out.
839                 anim = new AlphaAnimation(1, 0);
840                 anim.setDetachWallpaper(true);
841             } else {
842                 // For normal animations, the exiting element just holds in place.
843                 anim = new AlphaAnimation(1, 1);
844             }
845             anim.setInterpolator(mDecelerateInterpolator);
846             anim.setDuration(duration);
847             anim.setFillAfter(true);
848         }
849         return anim;
850     }
851 
852     /**
853      * Prepares the specified animation with a standard duration, interpolator, etc.
854      */
prepareThumbnailAnimationWithDuration(Animation a, int appWidth, int appHeight, long duration, Interpolator interpolator)855     Animation prepareThumbnailAnimationWithDuration(Animation a, int appWidth, int appHeight,
856             long duration, Interpolator interpolator) {
857         if (duration > 0) {
858             a.setDuration(duration);
859         }
860         a.setFillAfter(true);
861         if (interpolator != null) {
862             a.setInterpolator(interpolator);
863         }
864         a.initialize(appWidth, appHeight, appWidth, appHeight);
865         return a;
866     }
867 
868     /**
869      * Prepares the specified animation with a standard duration, interpolator, etc.
870      */
prepareThumbnailAnimation(Animation a, int appWidth, int appHeight, int transit)871     Animation prepareThumbnailAnimation(Animation a, int appWidth, int appHeight, int transit) {
872         // Pick the desired duration.  If this is an inter-activity transition,
873         // it  is the standard duration for that.  Otherwise we use the longer
874         // task transition duration.
875         final int duration;
876         switch (transit) {
877             case TRANSIT_ACTIVITY_OPEN:
878             case TRANSIT_ACTIVITY_CLOSE:
879                 duration = mConfigShortAnimTime;
880                 break;
881             default:
882                 duration = DEFAULT_APP_TRANSITION_DURATION;
883                 break;
884         }
885         return prepareThumbnailAnimationWithDuration(a, appWidth, appHeight, duration,
886                 mDecelerateInterpolator);
887     }
888 
889     /**
890      * Return the current thumbnail transition state.
891      */
getThumbnailTransitionState(boolean enter)892     int getThumbnailTransitionState(boolean enter) {
893         if (enter) {
894             if (mNextAppTransitionScaleUp) {
895                 return THUMBNAIL_TRANSITION_ENTER_SCALE_UP;
896             } else {
897                 return THUMBNAIL_TRANSITION_ENTER_SCALE_DOWN;
898             }
899         } else {
900             if (mNextAppTransitionScaleUp) {
901                 return THUMBNAIL_TRANSITION_EXIT_SCALE_UP;
902             } else {
903                 return THUMBNAIL_TRANSITION_EXIT_SCALE_DOWN;
904             }
905         }
906     }
907 
908     /**
909      * This animation runs for the thumbnail that gets cross faded with the enter/exit activity
910      * when a thumbnail is specified with the pending animation override.
911      */
createThumbnailAspectScaleAnimationLocked(Rect appRect, @Nullable Rect contentInsets, Bitmap thumbnailHeader, final int taskId, int uiMode, int orientation)912     Animation createThumbnailAspectScaleAnimationLocked(Rect appRect, @Nullable Rect contentInsets,
913             Bitmap thumbnailHeader, final int taskId, int uiMode, int orientation) {
914         Animation a;
915         final int thumbWidthI = thumbnailHeader.getWidth();
916         final float thumbWidth = thumbWidthI > 0 ? thumbWidthI : 1;
917         final int thumbHeightI = thumbnailHeader.getHeight();
918         final int appWidth = appRect.width();
919 
920         float scaleW = appWidth / thumbWidth;
921         getNextAppTransitionStartRect(taskId, mTmpRect);
922         final float fromX;
923         final float fromY;
924         final float toX;
925         final float toY;
926         final float pivotX;
927         final float pivotY;
928         if (isTvUiMode(uiMode) || orientation == Configuration.ORIENTATION_PORTRAIT) {
929             fromX = mTmpRect.left;
930             fromY = mTmpRect.top;
931 
932             // For the curved translate animation to work, the pivot points needs to be at the
933             // same absolute position as the one from the real surface.
934             toX = mTmpRect.width() / 2 * (scaleW - 1f) + appRect.left;
935             toY = appRect.height() / 2 * (1 - 1 / scaleW) + appRect.top;
936             pivotX = mTmpRect.width() / 2;
937             pivotY = appRect.height() / 2 / scaleW;
938         } else {
939             pivotX = 0;
940             pivotY = 0;
941             fromX = mTmpRect.left;
942             fromY = mTmpRect.top;
943             toX = appRect.left;
944             toY = appRect.top;
945         }
946         final long duration = getAspectScaleDuration();
947         final Interpolator interpolator = getAspectScaleInterpolator();
948         if (mNextAppTransitionScaleUp) {
949             // Animation up from the thumbnail to the full screen
950             Animation scale = new ScaleAnimation(1f, scaleW, 1f, scaleW, pivotX, pivotY);
951             scale.setInterpolator(interpolator);
952             scale.setDuration(duration);
953             Animation alpha = new AlphaAnimation(1f, 0f);
954             alpha.setInterpolator(mNextAppTransition == TRANSIT_DOCK_TASK_FROM_RECENTS
955                     ? THUMBNAIL_DOCK_INTERPOLATOR : mThumbnailFadeOutInterpolator);
956             alpha.setDuration(mNextAppTransition == TRANSIT_DOCK_TASK_FROM_RECENTS
957                     ? duration / 2
958                     : duration);
959             Animation translate = createCurvedMotion(fromX, toX, fromY, toY);
960             translate.setInterpolator(interpolator);
961             translate.setDuration(duration);
962 
963             mTmpFromClipRect.set(0, 0, thumbWidthI, thumbHeightI);
964             mTmpToClipRect.set(appRect);
965 
966             // Containing frame is in screen space, but we need the clip rect in the
967             // app space.
968             mTmpToClipRect.offsetTo(0, 0);
969             mTmpToClipRect.right = (int) (mTmpToClipRect.right / scaleW);
970             mTmpToClipRect.bottom = (int) (mTmpToClipRect.bottom / scaleW);
971 
972             if (contentInsets != null) {
973                 mTmpToClipRect.inset((int) (-contentInsets.left * scaleW),
974                         (int) (-contentInsets.top * scaleW),
975                         (int) (-contentInsets.right * scaleW),
976                         (int) (-contentInsets.bottom * scaleW));
977             }
978 
979             Animation clipAnim = new ClipRectAnimation(mTmpFromClipRect, mTmpToClipRect);
980             clipAnim.setInterpolator(interpolator);
981             clipAnim.setDuration(duration);
982 
983             // This AnimationSet uses the Interpolators assigned above.
984             AnimationSet set = new AnimationSet(false);
985             set.addAnimation(scale);
986             set.addAnimation(alpha);
987             set.addAnimation(translate);
988             set.addAnimation(clipAnim);
989             a = set;
990         } else {
991             // Animation down from the full screen to the thumbnail
992             Animation scale = new ScaleAnimation(scaleW, 1f, scaleW, 1f, pivotX, pivotY);
993             scale.setInterpolator(interpolator);
994             scale.setDuration(duration);
995             Animation alpha = new AlphaAnimation(0f, 1f);
996             alpha.setInterpolator(mThumbnailFadeInInterpolator);
997             alpha.setDuration(duration);
998             Animation translate = createCurvedMotion(toX, fromX, toY, fromY);
999             translate.setInterpolator(interpolator);
1000             translate.setDuration(duration);
1001 
1002             // This AnimationSet uses the Interpolators assigned above.
1003             AnimationSet set = new AnimationSet(false);
1004             set.addAnimation(scale);
1005             set.addAnimation(alpha);
1006             set.addAnimation(translate);
1007             a = set;
1008 
1009         }
1010         return prepareThumbnailAnimationWithDuration(a, appWidth, appRect.height(), 0,
1011                 null);
1012     }
1013 
createCurvedMotion(float fromX, float toX, float fromY, float toY)1014     private Animation createCurvedMotion(float fromX, float toX, float fromY, float toY) {
1015 
1016         // Almost no x-change - use linear animation
1017         if (Math.abs(toX - fromX) < 1f || mNextAppTransition != TRANSIT_DOCK_TASK_FROM_RECENTS) {
1018             return new TranslateAnimation(fromX, toX, fromY, toY);
1019         } else {
1020             final Path path = createCurvedPath(fromX, toX, fromY, toY);
1021             return new CurvedTranslateAnimation(path);
1022         }
1023     }
1024 
createCurvedPath(float fromX, float toX, float fromY, float toY)1025     private Path createCurvedPath(float fromX, float toX, float fromY, float toY) {
1026         final Path path = new Path();
1027         path.moveTo(fromX, fromY);
1028 
1029         if (fromY > toY) {
1030             // If the object needs to go up, move it in horizontal direction first, then vertical.
1031             path.cubicTo(fromX, fromY, toX, 0.9f * fromY + 0.1f * toY, toX, toY);
1032         } else {
1033             // If the object needs to go down, move it in vertical direction first, then horizontal.
1034             path.cubicTo(fromX, fromY, fromX, 0.1f * fromY + 0.9f * toY, toX, toY);
1035         }
1036         return path;
1037     }
1038 
getAspectScaleDuration()1039     private long getAspectScaleDuration() {
1040         if (mNextAppTransition == TRANSIT_DOCK_TASK_FROM_RECENTS) {
1041             return (long) (THUMBNAIL_APP_TRANSITION_DURATION * 1.35f);
1042         } else {
1043             return THUMBNAIL_APP_TRANSITION_DURATION;
1044         }
1045     }
1046 
getAspectScaleInterpolator()1047     private Interpolator getAspectScaleInterpolator() {
1048         if (mNextAppTransition == TRANSIT_DOCK_TASK_FROM_RECENTS) {
1049             return mFastOutSlowInInterpolator;
1050         } else {
1051             return TOUCH_RESPONSE_INTERPOLATOR;
1052         }
1053     }
1054 
1055     /**
1056      * This alternate animation is created when we are doing a thumbnail transition, for the
1057      * activity that is leaving, and the activity that is entering.
1058      */
createAspectScaledThumbnailEnterExitAnimationLocked(int thumbTransitState, int uiMode, int orientation, int transit, Rect containingFrame, Rect contentInsets, @Nullable Rect surfaceInsets, boolean freeform, int taskId)1059     Animation createAspectScaledThumbnailEnterExitAnimationLocked(int thumbTransitState,
1060             int uiMode, int orientation, int transit, Rect containingFrame, Rect contentInsets,
1061             @Nullable Rect surfaceInsets, boolean freeform, int taskId) {
1062         Animation a;
1063         final int appWidth = containingFrame.width();
1064         final int appHeight = containingFrame.height();
1065         getDefaultNextAppTransitionStartRect(mTmpRect);
1066         final int thumbWidthI = mTmpRect.width();
1067         final float thumbWidth = thumbWidthI > 0 ? thumbWidthI : 1;
1068         final int thumbHeightI = mTmpRect.height();
1069         final float thumbHeight = thumbHeightI > 0 ? thumbHeightI : 1;
1070         final int thumbStartX = mTmpRect.left - containingFrame.left - contentInsets.left;
1071         final int thumbStartY = mTmpRect.top - containingFrame.top;
1072 
1073         switch (thumbTransitState) {
1074             case THUMBNAIL_TRANSITION_ENTER_SCALE_UP:
1075             case THUMBNAIL_TRANSITION_EXIT_SCALE_DOWN: {
1076                 final boolean scaleUp = thumbTransitState == THUMBNAIL_TRANSITION_ENTER_SCALE_UP;
1077                 if (freeform && scaleUp) {
1078                     a = createAspectScaledThumbnailEnterFreeformAnimationLocked(
1079                             containingFrame, surfaceInsets, taskId);
1080                 } else if (freeform) {
1081                     a = createAspectScaledThumbnailExitFreeformAnimationLocked(
1082                             containingFrame, surfaceInsets, taskId);
1083                 } else {
1084                     AnimationSet set = new AnimationSet(true);
1085 
1086                     // In portrait, we scale to fit the width
1087                     mTmpFromClipRect.set(containingFrame);
1088                     mTmpToClipRect.set(containingFrame);
1089 
1090                     // Containing frame is in screen space, but we need the clip rect in the
1091                     // app space.
1092                     mTmpFromClipRect.offsetTo(0, 0);
1093                     mTmpToClipRect.offsetTo(0, 0);
1094 
1095                     // Exclude insets region from the source clip.
1096                     mTmpFromClipRect.inset(contentInsets);
1097                     mNextAppTransitionInsets.set(contentInsets);
1098 
1099                     if (isTvUiMode(uiMode) || orientation == Configuration.ORIENTATION_PORTRAIT) {
1100                         // We scale the width and clip to the top/left square
1101                         float scale = thumbWidth /
1102                                 (appWidth - contentInsets.left - contentInsets.right);
1103                         int unscaledThumbHeight = (int) (thumbHeight / scale);
1104                         mTmpFromClipRect.bottom = mTmpFromClipRect.top + unscaledThumbHeight;
1105 
1106                         mNextAppTransitionInsets.set(contentInsets);
1107 
1108                         Animation scaleAnim = new ScaleAnimation(
1109                                 scaleUp ? scale : 1, scaleUp ? 1 : scale,
1110                                 scaleUp ? scale : 1, scaleUp ? 1 : scale,
1111                                 containingFrame.width() / 2f,
1112                                 containingFrame.height() / 2f + contentInsets.top);
1113                         final float targetX = (mTmpRect.left - containingFrame.left);
1114                         final float x = containingFrame.width() / 2f
1115                                 - containingFrame.width() / 2f * scale;
1116                         final float targetY = (mTmpRect.top - containingFrame.top);
1117                         final float y = containingFrame.height() / 2f
1118                                 - containingFrame.height() / 2f * scale;
1119                         final float startX = targetX - x;
1120                         final float startY = targetY - y;
1121                         Animation clipAnim = scaleUp
1122                                 ? new ClipRectAnimation(mTmpFromClipRect, mTmpToClipRect)
1123                                 : new ClipRectAnimation(mTmpToClipRect, mTmpFromClipRect);
1124                         Animation translateAnim = scaleUp
1125                                 ? createCurvedMotion(startX, 0, startY - contentInsets.top, 0)
1126                                 : createCurvedMotion(0, startX, 0, startY - contentInsets.top);
1127 
1128                         set.addAnimation(clipAnim);
1129                         set.addAnimation(scaleAnim);
1130                         set.addAnimation(translateAnim);
1131 
1132                     } else {
1133                         // In landscape, we don't scale at all and only crop
1134                         mTmpFromClipRect.bottom = mTmpFromClipRect.top + thumbHeightI;
1135                         mTmpFromClipRect.right = mTmpFromClipRect.left + thumbWidthI;
1136 
1137                         Animation clipAnim = scaleUp
1138                                 ? new ClipRectAnimation(mTmpFromClipRect, mTmpToClipRect)
1139                                 : new ClipRectAnimation(mTmpToClipRect, mTmpFromClipRect);
1140                         Animation translateAnim = scaleUp
1141                                 ? createCurvedMotion(thumbStartX, 0,
1142                                 thumbStartY - contentInsets.top, 0)
1143                                 : createCurvedMotion(0, thumbStartX, 0,
1144                                         thumbStartY - contentInsets.top);
1145 
1146                         set.addAnimation(clipAnim);
1147                         set.addAnimation(translateAnim);
1148                     }
1149                     a = set;
1150                     a.setZAdjustment(Animation.ZORDER_TOP);
1151                 }
1152                 break;
1153             }
1154             case THUMBNAIL_TRANSITION_EXIT_SCALE_UP: {
1155                 // Previous app window during the scale up
1156                 if (transit == TRANSIT_WALLPAPER_INTRA_OPEN) {
1157                     // Fade out the source activity if we are animating to a wallpaper
1158                     // activity.
1159                     a = new AlphaAnimation(1, 0);
1160                 } else {
1161                     a = new AlphaAnimation(1, 1);
1162                 }
1163                 break;
1164             }
1165             case THUMBNAIL_TRANSITION_ENTER_SCALE_DOWN: {
1166                 // Target app window during the scale down
1167                 if (transit == TRANSIT_WALLPAPER_INTRA_OPEN) {
1168                     // Fade in the destination activity if we are animating from a wallpaper
1169                     // activity.
1170                     a = new AlphaAnimation(0, 1);
1171                 } else {
1172                     a = new AlphaAnimation(1, 1);
1173                 }
1174                 break;
1175             }
1176             default:
1177                 throw new RuntimeException("Invalid thumbnail transition state");
1178         }
1179 
1180         return prepareThumbnailAnimationWithDuration(a, appWidth, appHeight,
1181                 getAspectScaleDuration(), getAspectScaleInterpolator());
1182     }
1183 
createAspectScaledThumbnailEnterFreeformAnimationLocked(Rect frame, @Nullable Rect surfaceInsets, int taskId)1184     private Animation createAspectScaledThumbnailEnterFreeformAnimationLocked(Rect frame,
1185             @Nullable Rect surfaceInsets, int taskId) {
1186         getNextAppTransitionStartRect(taskId, mTmpRect);
1187         return createAspectScaledThumbnailFreeformAnimationLocked(mTmpRect, frame, surfaceInsets,
1188                 true);
1189     }
1190 
createAspectScaledThumbnailExitFreeformAnimationLocked(Rect frame, @Nullable Rect surfaceInsets, int taskId)1191     private Animation createAspectScaledThumbnailExitFreeformAnimationLocked(Rect frame,
1192             @Nullable Rect surfaceInsets, int taskId) {
1193         getNextAppTransitionStartRect(taskId, mTmpRect);
1194         return createAspectScaledThumbnailFreeformAnimationLocked(frame, mTmpRect, surfaceInsets,
1195                 false);
1196     }
1197 
createAspectScaledThumbnailFreeformAnimationLocked(Rect sourceFrame, Rect destFrame, @Nullable Rect surfaceInsets, boolean enter)1198     private AnimationSet createAspectScaledThumbnailFreeformAnimationLocked(Rect sourceFrame,
1199             Rect destFrame, @Nullable Rect surfaceInsets, boolean enter) {
1200         final float sourceWidth = sourceFrame.width();
1201         final float sourceHeight = sourceFrame.height();
1202         final float destWidth = destFrame.width();
1203         final float destHeight = destFrame.height();
1204         final float scaleH = enter ? sourceWidth / destWidth : destWidth / sourceWidth;
1205         final float scaleV = enter ? sourceHeight / destHeight : destHeight / sourceHeight;
1206         AnimationSet set = new AnimationSet(true);
1207         final int surfaceInsetsH = surfaceInsets == null
1208                 ? 0 : surfaceInsets.left + surfaceInsets.right;
1209         final int surfaceInsetsV = surfaceInsets == null
1210                 ? 0 : surfaceInsets.top + surfaceInsets.bottom;
1211         // We want the scaling to happen from the center of the surface. In order to achieve that,
1212         // we need to account for surface insets that will be used to enlarge the surface.
1213         final float scaleHCenter = ((enter ? destWidth : sourceWidth) + surfaceInsetsH) / 2;
1214         final float scaleVCenter = ((enter ? destHeight : sourceHeight) + surfaceInsetsV) / 2;
1215         final ScaleAnimation scale = enter ?
1216                 new ScaleAnimation(scaleH, 1, scaleV, 1, scaleHCenter, scaleVCenter)
1217                 : new ScaleAnimation(1, scaleH, 1, scaleV, scaleHCenter, scaleVCenter);
1218         final int sourceHCenter = sourceFrame.left + sourceFrame.width() / 2;
1219         final int sourceVCenter = sourceFrame.top + sourceFrame.height() / 2;
1220         final int destHCenter = destFrame.left + destFrame.width() / 2;
1221         final int destVCenter = destFrame.top + destFrame.height() / 2;
1222         final int fromX = enter ? sourceHCenter - destHCenter : destHCenter - sourceHCenter;
1223         final int fromY = enter ? sourceVCenter - destVCenter : destVCenter - sourceVCenter;
1224         final TranslateAnimation translation = enter ? new TranslateAnimation(fromX, 0, fromY, 0)
1225                 : new TranslateAnimation(0, fromX, 0, fromY);
1226         set.addAnimation(scale);
1227         set.addAnimation(translation);
1228 
1229         final IRemoteCallback callback = mAnimationFinishedCallback;
1230         if (callback != null) {
1231             set.setAnimationListener(new Animation.AnimationListener() {
1232                 @Override
1233                 public void onAnimationStart(Animation animation) { }
1234 
1235                 @Override
1236                 public void onAnimationEnd(Animation animation) {
1237                     mService.mH.obtainMessage(H.DO_ANIMATION_CALLBACK, callback).sendToTarget();
1238                 }
1239 
1240                 @Override
1241                 public void onAnimationRepeat(Animation animation) { }
1242             });
1243         }
1244         return set;
1245     }
1246 
1247     /**
1248      * This animation runs for the thumbnail that gets cross faded with the enter/exit activity
1249      * when a thumbnail is specified with the pending animation override.
1250      */
createThumbnailScaleAnimationLocked(int appWidth, int appHeight, int transit, Bitmap thumbnailHeader)1251     Animation createThumbnailScaleAnimationLocked(int appWidth, int appHeight, int transit,
1252             Bitmap thumbnailHeader) {
1253         Animation a;
1254         getDefaultNextAppTransitionStartRect(mTmpRect);
1255         final int thumbWidthI = thumbnailHeader.getWidth();
1256         final float thumbWidth = thumbWidthI > 0 ? thumbWidthI : 1;
1257         final int thumbHeightI = thumbnailHeader.getHeight();
1258         final float thumbHeight = thumbHeightI > 0 ? thumbHeightI : 1;
1259 
1260         if (mNextAppTransitionScaleUp) {
1261             // Animation for the thumbnail zooming from its initial size to the full screen
1262             float scaleW = appWidth / thumbWidth;
1263             float scaleH = appHeight / thumbHeight;
1264             Animation scale = new ScaleAnimation(1, scaleW, 1, scaleH,
1265                     computePivot(mTmpRect.left, 1 / scaleW),
1266                     computePivot(mTmpRect.top, 1 / scaleH));
1267             scale.setInterpolator(mDecelerateInterpolator);
1268 
1269             Animation alpha = new AlphaAnimation(1, 0);
1270             alpha.setInterpolator(mThumbnailFadeOutInterpolator);
1271 
1272             // This AnimationSet uses the Interpolators assigned above.
1273             AnimationSet set = new AnimationSet(false);
1274             set.addAnimation(scale);
1275             set.addAnimation(alpha);
1276             a = set;
1277         } else {
1278             // Animation for the thumbnail zooming down from the full screen to its final size
1279             float scaleW = appWidth / thumbWidth;
1280             float scaleH = appHeight / thumbHeight;
1281             a = new ScaleAnimation(scaleW, 1, scaleH, 1,
1282                     computePivot(mTmpRect.left, 1 / scaleW),
1283                     computePivot(mTmpRect.top, 1 / scaleH));
1284         }
1285 
1286         return prepareThumbnailAnimation(a, appWidth, appHeight, transit);
1287     }
1288 
1289     /**
1290      * This animation is created when we are doing a thumbnail transition, for the activity that is
1291      * leaving, and the activity that is entering.
1292      */
createThumbnailEnterExitAnimationLocked(int thumbTransitState, Rect containingFrame, int transit, int taskId)1293     Animation createThumbnailEnterExitAnimationLocked(int thumbTransitState, Rect containingFrame,
1294             int transit, int taskId) {
1295         final int appWidth = containingFrame.width();
1296         final int appHeight = containingFrame.height();
1297         Bitmap thumbnailHeader = getAppTransitionThumbnailHeader(taskId);
1298         Animation a;
1299         getDefaultNextAppTransitionStartRect(mTmpRect);
1300         final int thumbWidthI = thumbnailHeader != null ? thumbnailHeader.getWidth() : appWidth;
1301         final float thumbWidth = thumbWidthI > 0 ? thumbWidthI : 1;
1302         final int thumbHeightI = thumbnailHeader != null ? thumbnailHeader.getHeight() : appHeight;
1303         final float thumbHeight = thumbHeightI > 0 ? thumbHeightI : 1;
1304 
1305         switch (thumbTransitState) {
1306             case THUMBNAIL_TRANSITION_ENTER_SCALE_UP: {
1307                 // Entering app scales up with the thumbnail
1308                 float scaleW = thumbWidth / appWidth;
1309                 float scaleH = thumbHeight / appHeight;
1310                 a = new ScaleAnimation(scaleW, 1, scaleH, 1,
1311                         computePivot(mTmpRect.left, scaleW),
1312                         computePivot(mTmpRect.top, scaleH));
1313                 break;
1314             }
1315             case THUMBNAIL_TRANSITION_EXIT_SCALE_UP: {
1316                 // Exiting app while the thumbnail is scaling up should fade or stay in place
1317                 if (transit == TRANSIT_WALLPAPER_INTRA_OPEN) {
1318                     // Fade out while bringing up selected activity. This keeps the
1319                     // current activity from showing through a launching wallpaper
1320                     // activity.
1321                     a = new AlphaAnimation(1, 0);
1322                 } else {
1323                     // noop animation
1324                     a = new AlphaAnimation(1, 1);
1325                 }
1326                 break;
1327             }
1328             case THUMBNAIL_TRANSITION_ENTER_SCALE_DOWN: {
1329                 // Entering the other app, it should just be visible while we scale the thumbnail
1330                 // down above it
1331                 a = new AlphaAnimation(1, 1);
1332                 break;
1333             }
1334             case THUMBNAIL_TRANSITION_EXIT_SCALE_DOWN: {
1335                 // Exiting the current app, the app should scale down with the thumbnail
1336                 float scaleW = thumbWidth / appWidth;
1337                 float scaleH = thumbHeight / appHeight;
1338                 Animation scale = new ScaleAnimation(1, scaleW, 1, scaleH,
1339                         computePivot(mTmpRect.left, scaleW),
1340                         computePivot(mTmpRect.top, scaleH));
1341 
1342                 Animation alpha = new AlphaAnimation(1, 0);
1343 
1344                 AnimationSet set = new AnimationSet(true);
1345                 set.addAnimation(scale);
1346                 set.addAnimation(alpha);
1347                 set.setZAdjustment(Animation.ZORDER_TOP);
1348                 a = set;
1349                 break;
1350             }
1351             default:
1352                 throw new RuntimeException("Invalid thumbnail transition state");
1353         }
1354 
1355         return prepareThumbnailAnimation(a, appWidth, appHeight, transit);
1356     }
1357 
createRelaunchAnimation(Rect containingFrame, Rect contentInsets)1358     private Animation createRelaunchAnimation(Rect containingFrame, Rect contentInsets) {
1359         getDefaultNextAppTransitionStartRect(mTmpFromClipRect);
1360         final int left = mTmpFromClipRect.left;
1361         final int top = mTmpFromClipRect.top;
1362         mTmpFromClipRect.offset(-left, -top);
1363         // TODO: Isn't that strange that we ignore exact position of the containingFrame?
1364         mTmpToClipRect.set(0, 0, containingFrame.width(), containingFrame.height());
1365         AnimationSet set = new AnimationSet(true);
1366         float fromWidth = mTmpFromClipRect.width();
1367         float toWidth = mTmpToClipRect.width();
1368         float fromHeight = mTmpFromClipRect.height();
1369         // While the window might span the whole display, the actual content will be cropped to the
1370         // system decoration frame, for example when the window is docked. We need to take into
1371         // account the visible height when constructing the animation.
1372         float toHeight = mTmpToClipRect.height() - contentInsets.top - contentInsets.bottom;
1373         int translateAdjustment = 0;
1374         if (fromWidth <= toWidth && fromHeight <= toHeight) {
1375             // The final window is larger in both dimensions than current window (e.g. we are
1376             // maximizing), so we can simply unclip the new window and there will be no disappearing
1377             // frame.
1378             set.addAnimation(new ClipRectAnimation(mTmpFromClipRect, mTmpToClipRect));
1379         } else {
1380             // The disappearing window has one larger dimension. We need to apply scaling, so the
1381             // first frame of the entry animation matches the old window.
1382             set.addAnimation(new ScaleAnimation(fromWidth / toWidth, 1, fromHeight / toHeight, 1));
1383             // We might not be going exactly full screen, but instead be aligned under the status
1384             // bar using cropping. We still need to account for the cropped part, which will also
1385             // be scaled.
1386             translateAdjustment = (int) (contentInsets.top * fromHeight / toHeight);
1387         }
1388 
1389         // We animate the translation from the old position of the removed window, to the new
1390         // position of the added window. The latter might not be full screen, for example docked for
1391         // docked windows.
1392         TranslateAnimation translate = new TranslateAnimation(left - containingFrame.left,
1393                 0, top - containingFrame.top - translateAdjustment, 0);
1394         set.addAnimation(translate);
1395         set.setDuration(DEFAULT_APP_TRANSITION_DURATION);
1396         set.setZAdjustment(Animation.ZORDER_TOP);
1397         return set;
1398     }
1399 
1400     /**
1401      * @return true if and only if the first frame of the transition can be skipped, i.e. the first
1402      *         frame of the transition doesn't change the visuals on screen, so we can start
1403      *         directly with the second one
1404      */
canSkipFirstFrame()1405     boolean canSkipFirstFrame() {
1406         return mNextAppTransitionType != NEXT_TRANSIT_TYPE_CUSTOM
1407                 && mNextAppTransitionType != NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE
1408                 && mNextAppTransitionType != NEXT_TRANSIT_TYPE_CLIP_REVEAL;
1409     }
1410 
1411     /**
1412      *
1413      * @param frame These are the bounds of the window when it finishes the animation. This is where
1414      *              the animation must usually finish in entrance animation, as the next frame will
1415      *              display the window at these coordinates. In case of exit animation, this is
1416      *              where the animation must start, as the frame before the animation is displaying
1417      *              the window at these bounds.
1418      * @param insets Knowing where the window will be positioned is not enough. Some parts of the
1419      *               window might be obscured, usually by the system windows (status bar and
1420      *               navigation bar) and we use content insets to convey that information. This
1421      *               usually affects the animation aspects vertically, as the system decoration is
1422      *               at the top and the bottom. For example when we animate from full screen to
1423      *               recents, we want to exclude the covered parts, because they won't match the
1424      *               thumbnail after the last frame is executed.
1425      * @param surfaceInsets In rare situation the surface is larger than the content and we need to
1426      *                      know about this to make the animation frames match. We currently use
1427      *                      this for freeform windows, which have larger surfaces to display
1428      *                      shadows. When we animate them from recents, we want to match the content
1429      *                      to the recents thumbnail and hence need to account for the surface being
1430      *                      bigger.
1431      */
loadAnimation(WindowManager.LayoutParams lp, int transit, boolean enter, int uiMode, int orientation, Rect frame, Rect displayFrame, Rect insets, @Nullable Rect surfaceInsets, boolean isVoiceInteraction, boolean freeform, int taskId)1432     Animation loadAnimation(WindowManager.LayoutParams lp, int transit, boolean enter, int uiMode,
1433             int orientation, Rect frame, Rect displayFrame, Rect insets,
1434             @Nullable Rect surfaceInsets, boolean isVoiceInteraction, boolean freeform,
1435             int taskId) {
1436         Animation a;
1437         if (isVoiceInteraction && (transit == TRANSIT_ACTIVITY_OPEN
1438                 || transit == TRANSIT_TASK_OPEN
1439                 || transit == TRANSIT_TASK_TO_FRONT)) {
1440             a = loadAnimationRes(lp, enter
1441                     ? com.android.internal.R.anim.voice_activity_open_enter
1442                     : com.android.internal.R.anim.voice_activity_open_exit);
1443             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1444                     "applyAnimation voice:"
1445                     + " anim=" + a + " transit=" + appTransitionToString(transit)
1446                     + " isEntrance=" + enter + " Callers=" + Debug.getCallers(3));
1447         } else if (isVoiceInteraction && (transit == TRANSIT_ACTIVITY_CLOSE
1448                 || transit == TRANSIT_TASK_CLOSE
1449                 || transit == TRANSIT_TASK_TO_BACK)) {
1450             a = loadAnimationRes(lp, enter
1451                     ? com.android.internal.R.anim.voice_activity_close_enter
1452                     : com.android.internal.R.anim.voice_activity_close_exit);
1453             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1454                     "applyAnimation voice:"
1455                     + " anim=" + a + " transit=" + appTransitionToString(transit)
1456                     + " isEntrance=" + enter + " Callers=" + Debug.getCallers(3));
1457         } else if (transit == TRANSIT_ACTIVITY_RELAUNCH) {
1458             a = createRelaunchAnimation(frame, insets);
1459             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1460                     "applyAnimation:"
1461                     + " anim=" + a + " nextAppTransition=" + mNextAppTransition
1462                     + " transit=" + appTransitionToString(transit)
1463                     + " Callers=" + Debug.getCallers(3));
1464         } else if (mNextAppTransitionType == NEXT_TRANSIT_TYPE_CUSTOM) {
1465             a = loadAnimationRes(mNextAppTransitionPackage, enter ?
1466                     mNextAppTransitionEnter : mNextAppTransitionExit);
1467             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1468                     "applyAnimation:"
1469                     + " anim=" + a + " nextAppTransition=ANIM_CUSTOM"
1470                     + " transit=" + appTransitionToString(transit) + " isEntrance=" + enter
1471                     + " Callers=" + Debug.getCallers(3));
1472         } else if (mNextAppTransitionType == NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE) {
1473             a = loadAnimationRes(mNextAppTransitionPackage, mNextAppTransitionInPlace);
1474             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1475                     "applyAnimation:"
1476                     + " anim=" + a + " nextAppTransition=ANIM_CUSTOM_IN_PLACE"
1477                     + " transit=" + appTransitionToString(transit)
1478                     + " Callers=" + Debug.getCallers(3));
1479         } else if (mNextAppTransitionType == NEXT_TRANSIT_TYPE_CLIP_REVEAL) {
1480             a = createClipRevealAnimationLocked(transit, enter, frame, displayFrame);
1481             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1482                     "applyAnimation:"
1483                             + " anim=" + a + " nextAppTransition=ANIM_CLIP_REVEAL"
1484                             + " transit=" + appTransitionToString(transit)
1485                             + " Callers=" + Debug.getCallers(3));
1486         } else if (mNextAppTransitionType == NEXT_TRANSIT_TYPE_SCALE_UP) {
1487             a = createScaleUpAnimationLocked(transit, enter, frame);
1488             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1489                     "applyAnimation:"
1490                     + " anim=" + a + " nextAppTransition=ANIM_SCALE_UP"
1491                     + " transit=" + appTransitionToString(transit) + " isEntrance=" + enter
1492                     + " Callers=" + Debug.getCallers(3));
1493         } else if (mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP ||
1494                 mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN) {
1495             mNextAppTransitionScaleUp =
1496                     (mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP);
1497             a = createThumbnailEnterExitAnimationLocked(getThumbnailTransitionState(enter),
1498                     frame, transit, taskId);
1499             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) {
1500                 String animName = mNextAppTransitionScaleUp ?
1501                         "ANIM_THUMBNAIL_SCALE_UP" : "ANIM_THUMBNAIL_SCALE_DOWN";
1502                 Slog.v(TAG, "applyAnimation:"
1503                         + " anim=" + a + " nextAppTransition=" + animName
1504                         + " transit=" + appTransitionToString(transit) + " isEntrance=" + enter
1505                         + " Callers=" + Debug.getCallers(3));
1506             }
1507         } else if (mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP ||
1508                 mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN) {
1509             mNextAppTransitionScaleUp =
1510                     (mNextAppTransitionType == NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP);
1511             a = createAspectScaledThumbnailEnterExitAnimationLocked(
1512                     getThumbnailTransitionState(enter), uiMode, orientation, transit, frame,
1513                     insets, surfaceInsets, freeform, taskId);
1514             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) {
1515                 String animName = mNextAppTransitionScaleUp ?
1516                         "ANIM_THUMBNAIL_ASPECT_SCALE_UP" : "ANIM_THUMBNAIL_ASPECT_SCALE_DOWN";
1517                 Slog.v(TAG, "applyAnimation:"
1518                         + " anim=" + a + " nextAppTransition=" + animName
1519                         + " transit=" + appTransitionToString(transit) + " isEntrance=" + enter
1520                         + " Callers=" + Debug.getCallers(3));
1521             }
1522         } else {
1523             int animAttr = 0;
1524             switch (transit) {
1525                 case TRANSIT_ACTIVITY_OPEN:
1526                     animAttr = enter
1527                             ? WindowAnimation_activityOpenEnterAnimation
1528                             : WindowAnimation_activityOpenExitAnimation;
1529                     break;
1530                 case TRANSIT_ACTIVITY_CLOSE:
1531                     animAttr = enter
1532                             ? WindowAnimation_activityCloseEnterAnimation
1533                             : WindowAnimation_activityCloseExitAnimation;
1534                     break;
1535                 case TRANSIT_DOCK_TASK_FROM_RECENTS:
1536                 case TRANSIT_TASK_OPEN:
1537                     animAttr = enter
1538                             ? WindowAnimation_taskOpenEnterAnimation
1539                             : WindowAnimation_taskOpenExitAnimation;
1540                     break;
1541                 case TRANSIT_TASK_CLOSE:
1542                     animAttr = enter
1543                             ? WindowAnimation_taskCloseEnterAnimation
1544                             : WindowAnimation_taskCloseExitAnimation;
1545                     break;
1546                 case TRANSIT_TASK_TO_FRONT:
1547                     animAttr = enter
1548                             ? WindowAnimation_taskToFrontEnterAnimation
1549                             : WindowAnimation_taskToFrontExitAnimation;
1550                     break;
1551                 case TRANSIT_TASK_TO_BACK:
1552                     animAttr = enter
1553                             ? WindowAnimation_taskToBackEnterAnimation
1554                             : WindowAnimation_taskToBackExitAnimation;
1555                     break;
1556                 case TRANSIT_WALLPAPER_OPEN:
1557                     animAttr = enter
1558                             ? WindowAnimation_wallpaperOpenEnterAnimation
1559                             : WindowAnimation_wallpaperOpenExitAnimation;
1560                     break;
1561                 case TRANSIT_WALLPAPER_CLOSE:
1562                     animAttr = enter
1563                             ? WindowAnimation_wallpaperCloseEnterAnimation
1564                             : WindowAnimation_wallpaperCloseExitAnimation;
1565                     break;
1566                 case TRANSIT_WALLPAPER_INTRA_OPEN:
1567                     animAttr = enter
1568                             ? WindowAnimation_wallpaperIntraOpenEnterAnimation
1569                             : WindowAnimation_wallpaperIntraOpenExitAnimation;
1570                     break;
1571                 case TRANSIT_WALLPAPER_INTRA_CLOSE:
1572                     animAttr = enter
1573                             ? WindowAnimation_wallpaperIntraCloseEnterAnimation
1574                             : WindowAnimation_wallpaperIntraCloseExitAnimation;
1575                     break;
1576                 case TRANSIT_TASK_OPEN_BEHIND:
1577                     animAttr = enter
1578                             ? WindowAnimation_launchTaskBehindSourceAnimation
1579                             : WindowAnimation_launchTaskBehindTargetAnimation;
1580             }
1581             a = animAttr != 0 ? loadAnimationAttr(lp, animAttr) : null;
1582             if (DEBUG_APP_TRANSITIONS || DEBUG_ANIM) Slog.v(TAG,
1583                     "applyAnimation:"
1584                     + " anim=" + a
1585                     + " animAttr=0x" + Integer.toHexString(animAttr)
1586                     + " transit=" + appTransitionToString(transit) + " isEntrance=" + enter
1587                     + " Callers=" + Debug.getCallers(3));
1588         }
1589         return a;
1590     }
1591 
getAppStackClipMode()1592     int getAppStackClipMode() {
1593         return mNextAppTransition == TRANSIT_ACTIVITY_RELAUNCH
1594                 || mNextAppTransition == TRANSIT_DOCK_TASK_FROM_RECENTS
1595                 || mNextAppTransitionType == NEXT_TRANSIT_TYPE_CLIP_REVEAL
1596                 ? STACK_CLIP_NONE
1597                 : STACK_CLIP_AFTER_ANIM;
1598     }
1599 
postAnimationCallback()1600     void postAnimationCallback() {
1601         if (mNextAppTransitionCallback != null) {
1602             mService.mH.sendMessage(mService.mH.obtainMessage(H.DO_ANIMATION_CALLBACK,
1603                     mNextAppTransitionCallback));
1604             mNextAppTransitionCallback = null;
1605         }
1606     }
1607 
overridePendingAppTransition(String packageName, int enterAnim, int exitAnim, IRemoteCallback startedCallback)1608     void overridePendingAppTransition(String packageName, int enterAnim, int exitAnim,
1609             IRemoteCallback startedCallback) {
1610         if (isTransitionSet()) {
1611             clear();
1612             mNextAppTransitionType = NEXT_TRANSIT_TYPE_CUSTOM;
1613             mNextAppTransitionPackage = packageName;
1614             mNextAppTransitionEnter = enterAnim;
1615             mNextAppTransitionExit = exitAnim;
1616             postAnimationCallback();
1617             mNextAppTransitionCallback = startedCallback;
1618         } else {
1619             postAnimationCallback();
1620         }
1621     }
1622 
overridePendingAppTransitionScaleUp(int startX, int startY, int startWidth, int startHeight)1623     void overridePendingAppTransitionScaleUp(int startX, int startY, int startWidth,
1624             int startHeight) {
1625         if (isTransitionSet()) {
1626             clear();
1627             mNextAppTransitionType = NEXT_TRANSIT_TYPE_SCALE_UP;
1628             putDefaultNextAppTransitionCoordinates(startX, startY, startWidth, startHeight, null);
1629             postAnimationCallback();
1630         }
1631     }
1632 
overridePendingAppTransitionClipReveal(int startX, int startY, int startWidth, int startHeight)1633     void overridePendingAppTransitionClipReveal(int startX, int startY,
1634                                                 int startWidth, int startHeight) {
1635         if (isTransitionSet()) {
1636             clear();
1637             mNextAppTransitionType = NEXT_TRANSIT_TYPE_CLIP_REVEAL;
1638             putDefaultNextAppTransitionCoordinates(startX, startY, startWidth, startHeight, null);
1639             postAnimationCallback();
1640         }
1641     }
1642 
overridePendingAppTransitionThumb(Bitmap srcThumb, int startX, int startY, IRemoteCallback startedCallback, boolean scaleUp)1643     void overridePendingAppTransitionThumb(Bitmap srcThumb, int startX, int startY,
1644                                            IRemoteCallback startedCallback, boolean scaleUp) {
1645         if (isTransitionSet()) {
1646             clear();
1647             mNextAppTransitionType = scaleUp ? NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP
1648                     : NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN;
1649             mNextAppTransitionScaleUp = scaleUp;
1650             putDefaultNextAppTransitionCoordinates(startX, startY, 0, 0, srcThumb);
1651             postAnimationCallback();
1652             mNextAppTransitionCallback = startedCallback;
1653         } else {
1654             postAnimationCallback();
1655         }
1656     }
1657 
overridePendingAppTransitionAspectScaledThumb(Bitmap srcThumb, int startX, int startY, int targetWidth, int targetHeight, IRemoteCallback startedCallback, boolean scaleUp)1658     void overridePendingAppTransitionAspectScaledThumb(Bitmap srcThumb, int startX, int startY,
1659             int targetWidth, int targetHeight, IRemoteCallback startedCallback, boolean scaleUp) {
1660         if (isTransitionSet()) {
1661             clear();
1662             mNextAppTransitionType = scaleUp ? NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP
1663                     : NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN;
1664             mNextAppTransitionScaleUp = scaleUp;
1665             putDefaultNextAppTransitionCoordinates(startX, startY, targetWidth, targetHeight,
1666                     srcThumb);
1667             postAnimationCallback();
1668             mNextAppTransitionCallback = startedCallback;
1669         } else {
1670             postAnimationCallback();
1671         }
1672     }
1673 
overridePendingAppTransitionMultiThumb(AppTransitionAnimationSpec[] specs, IRemoteCallback onAnimationStartedCallback, IRemoteCallback onAnimationFinishedCallback, boolean scaleUp)1674     public void overridePendingAppTransitionMultiThumb(AppTransitionAnimationSpec[] specs,
1675             IRemoteCallback onAnimationStartedCallback, IRemoteCallback onAnimationFinishedCallback,
1676             boolean scaleUp) {
1677         if (isTransitionSet()) {
1678             clear();
1679             mNextAppTransitionType = scaleUp ? NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP
1680                     : NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN;
1681             mNextAppTransitionScaleUp = scaleUp;
1682             if (specs != null) {
1683                 for (int i = 0; i < specs.length; i++) {
1684                     AppTransitionAnimationSpec spec = specs[i];
1685                     if (spec != null) {
1686                         mNextAppTransitionAnimationsSpecs.put(spec.taskId, spec);
1687                         if (i == 0) {
1688                             // In full screen mode, the transition code depends on the default spec
1689                             // to be set.
1690                             Rect rect = spec.rect;
1691                             putDefaultNextAppTransitionCoordinates(rect.left, rect.top,
1692                                     rect.width(), rect.height(), spec.bitmap);
1693                         }
1694                     }
1695                 }
1696             }
1697             postAnimationCallback();
1698             mNextAppTransitionCallback = onAnimationStartedCallback;
1699             mAnimationFinishedCallback = onAnimationFinishedCallback;
1700         } else {
1701             postAnimationCallback();
1702         }
1703     }
1704 
overridePendingAppTransitionMultiThumbFuture( IAppTransitionAnimationSpecsFuture specsFuture, IRemoteCallback callback, boolean scaleUp)1705     void overridePendingAppTransitionMultiThumbFuture(
1706             IAppTransitionAnimationSpecsFuture specsFuture, IRemoteCallback callback,
1707             boolean scaleUp) {
1708         if (isTransitionSet()) {
1709             clear();
1710             mNextAppTransitionType = scaleUp ? NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP
1711                     : NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN;
1712             mNextAppTransitionAnimationsSpecsFuture = specsFuture;
1713             mNextAppTransitionScaleUp = scaleUp;
1714             mNextAppTransitionFutureCallback = callback;
1715         }
1716     }
1717 
overrideInPlaceAppTransition(String packageName, int anim)1718     void overrideInPlaceAppTransition(String packageName, int anim) {
1719         if (isTransitionSet()) {
1720             clear();
1721             mNextAppTransitionType = NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE;
1722             mNextAppTransitionPackage = packageName;
1723             mNextAppTransitionInPlace = anim;
1724         } else {
1725             postAnimationCallback();
1726         }
1727     }
1728 
1729     /**
1730      * If a future is set for the app transition specs, fetch it in another thread.
1731      */
fetchAppTransitionSpecsFromFuture()1732     private void fetchAppTransitionSpecsFromFuture() {
1733         if (mNextAppTransitionAnimationsSpecsFuture != null) {
1734             mNextAppTransitionAnimationsSpecsPending = true;
1735             final IAppTransitionAnimationSpecsFuture future
1736                     = mNextAppTransitionAnimationsSpecsFuture;
1737             mNextAppTransitionAnimationsSpecsFuture = null;
1738             mDefaultExecutor.execute(new Runnable() {
1739                 @Override
1740                 public void run() {
1741                     AppTransitionAnimationSpec[] specs = null;
1742                     try {
1743                         specs = future.get();
1744                     } catch (RemoteException e) {
1745                         Slog.w(TAG, "Failed to fetch app transition specs: " + e);
1746                     }
1747                     synchronized (mService.mWindowMap) {
1748                         mNextAppTransitionAnimationsSpecsPending = false;
1749                         overridePendingAppTransitionMultiThumb(specs,
1750                                 mNextAppTransitionFutureCallback, null /* finishedCallback */,
1751                                 mNextAppTransitionScaleUp);
1752                         mNextAppTransitionFutureCallback = null;
1753                         if (specs != null) {
1754                             mService.prolongAnimationsFromSpecs(specs, mNextAppTransitionScaleUp);
1755                         }
1756                     }
1757                     mService.requestTraversal();
1758                 }
1759             });
1760         }
1761     }
1762 
1763     @Override
toString()1764     public String toString() {
1765         return "mNextAppTransition=" + appTransitionToString(mNextAppTransition);
1766     }
1767 
1768     /**
1769      * Returns the human readable name of a window transition.
1770      *
1771      * @param transition The window transition.
1772      * @return The transition symbolic name.
1773      */
appTransitionToString(int transition)1774     public static String appTransitionToString(int transition) {
1775         switch (transition) {
1776             case TRANSIT_UNSET: {
1777                 return "TRANSIT_UNSET";
1778             }
1779             case TRANSIT_NONE: {
1780                 return "TRANSIT_NONE";
1781             }
1782             case TRANSIT_ACTIVITY_OPEN: {
1783                 return "TRANSIT_ACTIVITY_OPEN";
1784             }
1785             case TRANSIT_ACTIVITY_CLOSE: {
1786                 return "TRANSIT_ACTIVITY_CLOSE";
1787             }
1788             case TRANSIT_TASK_OPEN: {
1789                 return "TRANSIT_TASK_OPEN";
1790             }
1791             case TRANSIT_TASK_CLOSE: {
1792                 return "TRANSIT_TASK_CLOSE";
1793             }
1794             case TRANSIT_TASK_TO_FRONT: {
1795                 return "TRANSIT_TASK_TO_FRONT";
1796             }
1797             case TRANSIT_TASK_TO_BACK: {
1798                 return "TRANSIT_TASK_TO_BACK";
1799             }
1800             case TRANSIT_WALLPAPER_CLOSE: {
1801                 return "TRANSIT_WALLPAPER_CLOSE";
1802             }
1803             case TRANSIT_WALLPAPER_OPEN: {
1804                 return "TRANSIT_WALLPAPER_OPEN";
1805             }
1806             case TRANSIT_WALLPAPER_INTRA_OPEN: {
1807                 return "TRANSIT_WALLPAPER_INTRA_OPEN";
1808             }
1809             case TRANSIT_WALLPAPER_INTRA_CLOSE: {
1810                 return "TRANSIT_WALLPAPER_INTRA_CLOSE";
1811             }
1812             case TRANSIT_TASK_OPEN_BEHIND: {
1813                 return "TRANSIT_TASK_OPEN_BEHIND";
1814             }
1815             case TRANSIT_ACTIVITY_RELAUNCH: {
1816                 return "TRANSIT_ACTIVITY_RELAUNCH";
1817             }
1818             case TRANSIT_DOCK_TASK_FROM_RECENTS: {
1819                 return "TRANSIT_DOCK_TASK_FROM_RECENTS";
1820             }
1821             default: {
1822                 return "<UNKNOWN>";
1823             }
1824         }
1825     }
1826 
appStateToString()1827     private String appStateToString() {
1828         switch (mAppTransitionState) {
1829             case APP_STATE_IDLE:
1830                 return "APP_STATE_IDLE";
1831             case APP_STATE_READY:
1832                 return "APP_STATE_READY";
1833             case APP_STATE_RUNNING:
1834                 return "APP_STATE_RUNNING";
1835             case APP_STATE_TIMEOUT:
1836                 return "APP_STATE_TIMEOUT";
1837             default:
1838                 return "unknown state=" + mAppTransitionState;
1839         }
1840     }
1841 
transitTypeToString()1842     private String transitTypeToString() {
1843         switch (mNextAppTransitionType) {
1844             case NEXT_TRANSIT_TYPE_NONE:
1845                 return "NEXT_TRANSIT_TYPE_NONE";
1846             case NEXT_TRANSIT_TYPE_CUSTOM:
1847                 return "NEXT_TRANSIT_TYPE_CUSTOM";
1848             case NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE:
1849                 return "NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE";
1850             case NEXT_TRANSIT_TYPE_SCALE_UP:
1851                 return "NEXT_TRANSIT_TYPE_SCALE_UP";
1852             case NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP:
1853                 return "NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP";
1854             case NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN:
1855                 return "NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN";
1856             case NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP:
1857                 return "NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP";
1858             case NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN:
1859                 return "NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN";
1860             default:
1861                 return "unknown type=" + mNextAppTransitionType;
1862         }
1863     }
1864 
1865     @Override
dump(PrintWriter pw, String prefix)1866     public void dump(PrintWriter pw, String prefix) {
1867         pw.print(prefix); pw.println(this);
1868         pw.print(prefix); pw.print("mAppTransitionState="); pw.println(appStateToString());
1869         if (mNextAppTransitionType != NEXT_TRANSIT_TYPE_NONE) {
1870             pw.print(prefix); pw.print("mNextAppTransitionType=");
1871                     pw.println(transitTypeToString());
1872         }
1873         switch (mNextAppTransitionType) {
1874             case NEXT_TRANSIT_TYPE_CUSTOM:
1875                 pw.print(prefix); pw.print("mNextAppTransitionPackage=");
1876                         pw.println(mNextAppTransitionPackage);
1877                 pw.print(prefix); pw.print("mNextAppTransitionEnter=0x");
1878                         pw.print(Integer.toHexString(mNextAppTransitionEnter));
1879                         pw.print(" mNextAppTransitionExit=0x");
1880                         pw.println(Integer.toHexString(mNextAppTransitionExit));
1881                 break;
1882             case NEXT_TRANSIT_TYPE_CUSTOM_IN_PLACE:
1883                 pw.print(prefix); pw.print("mNextAppTransitionPackage=");
1884                         pw.println(mNextAppTransitionPackage);
1885                 pw.print(prefix); pw.print("mNextAppTransitionInPlace=0x");
1886                         pw.print(Integer.toHexString(mNextAppTransitionInPlace));
1887                 break;
1888             case NEXT_TRANSIT_TYPE_SCALE_UP: {
1889                 getDefaultNextAppTransitionStartRect(mTmpRect);
1890                 pw.print(prefix); pw.print("mNextAppTransitionStartX=");
1891                         pw.print(mTmpRect.left);
1892                         pw.print(" mNextAppTransitionStartY=");
1893                         pw.println(mTmpRect.top);
1894                 pw.print(prefix); pw.print("mNextAppTransitionStartWidth=");
1895                         pw.print(mTmpRect.width());
1896                         pw.print(" mNextAppTransitionStartHeight=");
1897                         pw.println(mTmpRect.height());
1898                 break;
1899             }
1900             case NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_UP:
1901             case NEXT_TRANSIT_TYPE_THUMBNAIL_SCALE_DOWN:
1902             case NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_UP:
1903             case NEXT_TRANSIT_TYPE_THUMBNAIL_ASPECT_SCALE_DOWN: {
1904                 pw.print(prefix); pw.print("mDefaultNextAppTransitionAnimationSpec=");
1905                         pw.println(mDefaultNextAppTransitionAnimationSpec);
1906                 pw.print(prefix); pw.print("mNextAppTransitionAnimationsSpecs=");
1907                         pw.println(mNextAppTransitionAnimationsSpecs);
1908                 pw.print(prefix); pw.print("mNextAppTransitionScaleUp=");
1909                         pw.println(mNextAppTransitionScaleUp);
1910                 break;
1911             }
1912         }
1913         if (mNextAppTransitionCallback != null) {
1914             pw.print(prefix); pw.print("mNextAppTransitionCallback=");
1915                     pw.println(mNextAppTransitionCallback);
1916         }
1917         if (mLastUsedAppTransition != TRANSIT_NONE) {
1918             pw.print(prefix); pw.print("mLastUsedAppTransition=");
1919                     pw.println(appTransitionToString(mLastUsedAppTransition));
1920             pw.print(prefix); pw.print("mLastOpeningApp=");
1921                     pw.println(mLastOpeningApp);
1922             pw.print(prefix); pw.print("mLastClosingApp=");
1923                     pw.println(mLastClosingApp);
1924         }
1925     }
1926 
setCurrentUser(int newUserId)1927     public void setCurrentUser(int newUserId) {
1928         mCurrentUserId = newUserId;
1929     }
1930 
1931     /**
1932      * @return true if transition is not running and should not be skipped, false if transition is
1933      *         already running
1934      */
prepareAppTransitionLocked(int transit, boolean alwaysKeepCurrent)1935     boolean prepareAppTransitionLocked(int transit, boolean alwaysKeepCurrent) {
1936         if (DEBUG_APP_TRANSITIONS) Slog.v(TAG, "Prepare app transition:"
1937                 + " transit=" + appTransitionToString(transit)
1938                 + " " + this
1939                 + " alwaysKeepCurrent=" + alwaysKeepCurrent
1940                 + " Callers=" + Debug.getCallers(3));
1941         if (!isTransitionSet() || mNextAppTransition == TRANSIT_NONE) {
1942             setAppTransition(transit);
1943         } else if (!alwaysKeepCurrent) {
1944             if (transit == TRANSIT_TASK_OPEN && isTransitionEqual(TRANSIT_TASK_CLOSE)) {
1945                 // Opening a new task always supersedes a close for the anim.
1946                 setAppTransition(transit);
1947             } else if (transit == TRANSIT_ACTIVITY_OPEN
1948                     && isTransitionEqual(TRANSIT_ACTIVITY_CLOSE)) {
1949                 // Opening a new activity always supersedes a close for the anim.
1950                 setAppTransition(transit);
1951             }
1952         }
1953         boolean prepared = prepare();
1954         if (isTransitionSet()) {
1955             mService.mH.removeMessages(H.APP_TRANSITION_TIMEOUT);
1956             mService.mH.sendEmptyMessageDelayed(H.APP_TRANSITION_TIMEOUT, APP_TRANSITION_TIMEOUT_MS);
1957         }
1958         return prepared;
1959     }
1960 
1961     /**
1962      * @return whether the specified {@param uiMode} is the TV mode.
1963      */
isTvUiMode(int uiMode)1964     private boolean isTvUiMode(int uiMode) {
1965         return (uiMode & Configuration.UI_MODE_TYPE_TELEVISION) > 0;
1966     }
1967 }
1968