[游戏开发]Activity Stop条件及原理

基础知识

Stop入口

在这个流程期间判断加入Stopping列表的ActivityRecord是否正在执行动画,正在执行退出动画的页面不能执行stop流程。
如何判断ActivityRecord正在执行动画

    /**
     * Processes the activities to be stopped or destroyed. This should be called when the resumed
     * activities are idle or drawn.
     */
    private void processStoppingAndFinishingActivities(ActivityRecord launchedActivity,
            boolean processPausingActivities, String reason) {
        // Stop any activities that are scheduled to do so but have been waiting for the transition
        // animation to finish.
        ArrayList<ActivityRecord> readyToStopActivities = null;
        for (int i = mStoppingActivities.size() - 1; i >= 0; --i) {
            final ActivityRecord s = mStoppingActivities.get(i);
            // 遍历取出mStoppingActivities并判断当前Activity是否正在执行动画
            final boolean animating = s.isAnimating(TRANSITION | PARENTS,
                    ANIMATION_TYPE_APP_TRANSITION | ANIMATION_TYPE_RECENTS)
                    || s.inTransition();
            ProtoLog.v(WM_DEBUG_STATES, "Stopping %s: nowVisible=%b animating=%b "
                    + "finishing=%s", s, s.nowVisible, animating, s.finishing);
            // 没有执行动画才能继续走
            if (!animating || mService.mShuttingDown) {
                if (!processPausingActivities && s.isState(PAUSING)) {
                    // Defer processing pausing activities in this iteration and reschedule
                    // a delayed idle to reprocess it again
                    removeIdleTimeoutForActivity(launchedActivity);
                    scheduleIdleTimeout(launchedActivity);
                    continue;
                }

                ProtoLog.v(WM_DEBUG_STATES, "Ready to stop: %s", s);
                if (readyToStopActivities == null) {
                    readyToStopActivities = new ArrayList<>();
                }
                // 更换列表
                readyToStopActivities.add(s);

                mStoppingActivities.remove(i);
            }
        }
    	// 执行Activity的stopIfPossible
        final int numReadyStops = readyToStopActivities == null ? 0 : readyToStopActivities.size();
        for (int i = 0; i < numReadyStops; i++) {
            final ActivityRecord r = readyToStopActivities.get(i);
            if (r.isInHistory()) {
                if (r.finishing) {
                    // TODO(b/137329632): Wait for idle of the right activity, not just any.
                    r.destroyIfPossible(reason);
                } else {
                    r.stopIfPossible();
                }
            }
        }

      ........
    }

处理Stopping列表来自以下两条线：

执行IDLE_NOW_MSG消息

                case IDLE_NOW_MSG: {
                    if (DEBUG_IDLE) Slog.d(TAG_IDLE, "handleMessage: IDLE_NOW_MSG: r=" + msg.obj);
                    activityIdleFromMessage((ActivityRecord) msg.obj, false /* fromTimeout */);
                } break;
        ......

        private void activityIdleFromMessage(ActivityRecord idleActivity, boolean fromTimeout) {
            activityIdleInternal(idleActivity, fromTimeout,
                    fromTimeout /* processPausingActivities */, null /* config */);
        }

app端回调activityIdle

    @Override
    public void activityIdle(IBinder token, Configuration config, boolean stopProfiling) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "activityIdle");
                final ActivityRecord r = ActivityRecord.forTokenLocked(token);
                if (r == null) {
                    return;
                }
                mTaskSupervisor.activityIdleInternal(r, false /* fromTimeout */,
                        false /* processPausingActivities */, config);
                if (stopProfiling && r.hasProcess()) {
                    r.app.clearProfilerIfNeeded();
                }
            }
        } finally {
            Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
            Binder.restoreCallingIdentity(origId);
        }
    }

执行PROCESS_STOPPING_AND_FINISHING_MSG消息

                case PROCESS_STOPPING_AND_FINISHING_MSG: {
                    processStoppingAndFinishingActivities(null /* launchedActivity */,
                            false /* processPausingActivities */, "transit");
                } break;

执行IDLE_TIMEOUT_MSG超时消息

                case IDLE_TIMEOUT_MSG: {
                    if (DEBUG_IDLE) Slog.d(TAG_IDLE,
                            "handleMessage: IDLE_TIMEOUT_MSG: r=" + msg.obj);
                    // We don't at this point know if the activity is fullscreen, so we need to be
                    // conservative and assume it isn't.
                    activityIdleFromMessage((ActivityRecord) msg.obj, true /* fromTimeout */);
                } break;

发送相关消息

display线程的消息队列里，没有IDLE_NOW_MSG消息时才会去发送消息；

    final void scheduleIdle() {
        if (!mHandler.hasMessages(IDLE_NOW_MSG)) {
            mHandler.sendEmptyMessage(IDLE_NOW_MSG);
        }
    }

IDLE_NOW_MSG-直接发送

上一个页面完成pause后触发system server端的makeInvisible，将当前页面加入stoppping列表并尝试发送idle消息。

void addToStopping(boolean scheduleIdle, boolean idleDelayed, String reason) {
    .......
    // sheculeIdle为true
    if (scheduleIdle || forceIdle) {
    ProtoLog.v(WM_DEBUG_STATES,
               "Scheduling idle now: forceIdle=%b immediate=%b", forceIdle, !idleDelayed);
    //idleDelayed为false
    if (!idleDelayed) {
        mTaskSupervisor.scheduleIdle();
    } else {
        mTaskSupervisor.scheduleIdleTimeout(this);
    }
} else {
    rootTask.checkReadyForSleep();
}
}

IDLE_NOW_MSG-条件发送

在scheduleProcessStoppingAndFinishingActivitiesIfNeeded方法中满足以下条件也可尝试发送：

1. mStoppingActivities 存在待stop的Activity
2. 所有resume的Activity均处于idle状态

    void scheduleProcessStoppingAndFinishingActivitiesIfNeeded() {
        // 首先上个页面应该执行了addToStoppping方法，不然这里会直接返回
        if (mStoppingActivities.isEmpty() && mFinishingActivities.isEmpty()) {
            return;
        }
        // 上个页面所在app应回调了activityIdle方法，否则进不去这个if语句
        if (mRootWindowContainer.allResumedActivitiesIdle()) {
            // 尝试发送idle消息到dislay线程
            scheduleIdle();
            return;
        }
        // 如果下个页面处于visible状态，会发送PROCESS_STOPPING_AND_FINISHING_MSG消息
        if (!mHandler.hasMessages(PROCESS_STOPPING_AND_FINISHING_MSG)
                && mRootWindowContainer.allResumedActivitiesVisible()) {
            mHandler.sendEmptyMessage(PROCESS_STOPPING_AND_FINISHING_MSG);
        }
    }

发送PROCESS_STOPPING_AND_FINISHING_MSG消息

如上，scheduleProcessStoppingAndFinishingActivitiesIfNeeded 中如果不满足idle条件，但是所有resume页面处于可见状态；可以发送PROCESS_STOPPING_AND_FINISHING_MSG消息

发送IDLE_TIMEOUT_MSG超时消息

在system server端页面resume的时候去发送10s的延时消息，防止app主线程生命周期方法中操作耗时导致不能及时idle或visible。

    private static final int IDLE_TIMEOUT = 10 * 1000 * Build.HW_TIMEOUT_MULTIPLIER;
	void scheduleIdleTimeout(ActivityRecord next) {
        if (DEBUG_IDLE) Slog.d(TAG_IDLE, "scheduleIdleTimeout: Callers=" + Debug.getCallers(4));
        Message msg = mHandler.obtainMessage(IDLE_TIMEOUT_MSG, next);
        mHandler.sendMessageDelayed(msg, IDLE_TIMEOUT);
    }

相关条件成立

1. Stopping列表不为空

    void addToStopping(boolean scheduleIdle, boolean idleDelayed, String reason) {
        if (!mTaskSupervisor.mStoppingActivities.contains(this)) {
            EventLogTags.writeWmAddToStopping(mUserId, System.identityHashCode(this),
                    shortComponentName, reason);
            mTaskSupervisor.mStoppingActivities.add(this);
        }
        ......
    }

2-1. Resume的Activity处于idle状态

    void activityIdleInternal(ActivityRecord r, boolean fromTimeout,
            boolean processPausingActivities, Configuration config) {
        if (DEBUG_ALL) Slog.v(TAG, "Activity idle: " + r);
    	// 只有app回调过来的binder线程的r才不为null，display线程执行message不会进下面if语句
        if (r != null) {
            if (DEBUG_IDLE) Slog.d(TAG_IDLE, "activityIdleInternal: Callers="
                    + Debug.getCallers(4));
            mHandler.removeMessages(IDLE_TIMEOUT_MSG, r);
            r.finishLaunchTickingLocked();
            if (fromTimeout) {
                reportActivityLaunched(fromTimeout, r, INVALID_DELAY, -1 /* launchState */);
            }

            // This is a hack to semi-deal with a race condition
            // in the client where it can be constructed with a
            // newer configuration from when we asked it to launch.
            // We'll update with whatever configuration it now says
            // it used to launch.
            if (config != null) {
                r.setLastReportedGlobalConfiguration(config);
            }
        	// 设置当前Activity idle状态为true
            // We are now idle.  If someone is waiting for a thumbnail from
            // us, we can now deliver.
            r.idle = true;

            // Check if able to finish booting when device is booting and all resumed activities
            // are idle.
            if ((mService.isBooting() && mRootWindowContainer.allResumedActivitiesIdle())
                    || fromTimeout) {
                checkFinishBootingLocked();
            }

            // When activity is idle, we consider the relaunch must be successful, so let's clear
            // the flag.
            r.mRelaunchReason = RELAUNCH_REASON_NONE;
        }
        ......
    }

    boolean allResumedActivitiesIdle() {
        for (int displayNdx = getChildCount() - 1; displayNdx >= 0; --displayNdx) {
            // TODO(b/117135575): Check resumed activities on all visible root tasks.
            final DisplayContent display = getChildAt(displayNdx);
            if (display.isSleeping()) {
                // No resumed activities while display is sleeping.
                continue;
            }

            // If the focused root task is not null or not empty, there should have some activities
            // resuming or resumed. Make sure these activities are idle.
            final Task rootTask = display.getFocusedRootTask();
            if (rootTask == null || !rootTask.hasActivity()) {
                continue;
            }
            // 获取top resume页面并查看idle是否为true
            final ActivityRecord resumedActivity = rootTask.getTopResumedActivity();
            if (resumedActivity == null || !resumedActivity.idle) {
                ProtoLog.d(WM_DEBUG_STATES, "allResumedActivitiesIdle: rootTask=%d %s "
                        + "not idle", rootTask.getRootTaskId(), resumedActivity);
                return false;
            }
        }
        // End power mode launch when idle.
        mService.endLaunchPowerMode(ActivityTaskManagerService.POWER_MODE_REASON_START_ACTIVITY);
        return true;
    }

2-2. 或Resume的Activity窗口Visible

    /** Called when the windows associated app window container are visible. */
    void onWindowsVisible() {
        if (DEBUG_VISIBILITY) Slog.v(TAG_WM, "Reporting visible in " + token);
        mTaskSupervisor.stopWaitingForActivityVisible(this);
        if (DEBUG_SWITCH) Log.v(TAG_SWITCH, "windowsVisibleLocked(): " + this);
        if (!nowVisible) {
            // 设置当前Activity窗口可见
            nowVisible = true;
            launching = false;
            lastVisibleTime = SystemClock.uptimeMillis();
            mAtmService.scheduleAppGcsLocked();
            // The nowVisible may be false in onAnimationFinished because the transition animation
            // was started by starting window but the main window hasn't drawn so the procedure
            // didn't schedule. Hence also check when nowVisible becomes true (drawn) to avoid the
            // closing activity having to wait until idle timeout to be stopped or destroyed if the
            // next activity won't report idle (e.g. repeated view animation).
            mTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded();
            // If the activity is visible, but no windows are eligible to start input, unfreeze
            // to avoid permanently frozen IME insets.
            if (mImeInsetsFrozenUntilStartInput && getWindow(
                    win -> WindowManager.LayoutParams.mayUseInputMethod(win.mAttrs.flags))
                    == null) {
                mImeInsetsFrozenUntilStartInput = false;
            }
        }
    }

    boolean allResumedActivitiesVisible() {
        boolean[] foundResumed = {false};
        final boolean foundInvisibleResumedActivity = forAllRootTasks(rootTask -> {
            final ActivityRecord r = rootTask.getTopResumedActivity();
            if (r != null) {
                if (!r.nowVisible) {
                    return true;
                }
                foundResumed[0] = true;
            }
            return false;
        });
        if (foundInvisibleResumedActivity) {
            return false;
        }
        return foundResumed[0];
    }

2-3. 或已经到了10s超时时间

动画结束

如何判断ActivityRecord正在执行动画

    private OnAnimationFinishedCallback getFinishedCallback(
            @Nullable OnAnimationFinishedCallback staticAnimationFinishedCallback) {
        return (type, anim) -> {
            synchronized (mService.mGlobalLock) {
                final SurfaceAnimator target = mService.mAnimationTransferMap.remove(anim);
                if (target != null) {
                    target.mInnerAnimationFinishedCallback.onAnimationFinished(type, anim);
                    return;
                }

                if (anim != mAnimation) {
                    return;
                }
                final Runnable resetAndInvokeFinish = () -> {
                    // We need to check again if the animation has been replaced with a new
                    // animation because the animatable may defer to finish.
                    if (anim != mAnimation) {
                        return;
                    }
                    final OnAnimationFinishedCallback animationFinishCallback =
                            mSurfaceAnimationFinishedCallback;
                    // 1. 设置mAnimation为null
                    reset(mAnimatable.getSyncTransaction(), true /* destroyLeash */);
;				    // 回调ActivityRecord的onAnimationFinished
                    if (staticAnimationFinishedCallback != null) {
                        staticAnimationFinishedCallback.onAnimationFinished(type, anim);
                    }
                    if (animationFinishCallback != null) {
                        animationFinishCallback.onAnimationFinished(type, anim);
                    }
                };
                // If both the Animatable and AnimationAdapter requests to be deferred, only the
                // first one will be called.
                if (!(mAnimatable.shouldDeferAnimationFinish(resetAndInvokeFinish)
                        || anim.shouldDeferAnimationFinish(resetAndInvokeFinish))) {
                    resetAndInvokeFinish.run();
                }
                mAnimationFinished = true;
            }
        };
    }

常见场景

同个App进入新的页面

Prepare动画

Breakpoint reached
	at com.android.server.wm.AppTransition.prepareAppTransition(AppTransition.java:1596)
	at com.android.server.wm.DisplayContent.prepareAppTransition(DisplayContent.java:5605)
	at com.android.server.wm.DisplayContent.prepareAppTransition(DisplayContent.java:5596)
	at com.android.server.wm.TaskFragment.resumeTopActivity(TaskFragment.java:1455)
	at com.android.server.wm.Task.resumeTopActivityInnerLocked(Task.java:5602)
	at com.android.server.wm.Task.resumeTopActivityUncheckedLocked(Task.java:5530)
	at com.android.server.wm.RootWindowContainer.resumeFocusedTasksTopActivities(RootWindowContainer.java:2417)
	at com.android.server.wm.RootWindowContainer.resumeFocusedTasksTopActivities(RootWindowContainer.java:2403)
	at com.android.server.wm.TaskFragment.completePause(TaskFragment.java:1908)
	at com.android.server.wm.ActivityRecord.activityPaused(ActivityRecord.java:6673)
	at com.android.server.wm.ActivityClientController.activityPaused(ActivityClientController.java:191)
	at android.app.IActivityClientController$Stub.onTransact(IActivityClientController.java:582)
	at com.android.server.wm.ActivityClientController.onTransact(ActivityClientController.java:131)
	at android.os.Binder.execTransactInternal(Binder.java:1285)
	at android.os.Binder.execTransact(Binder.java:1249)
binder:3110_20 -> add mNextAppTransitionRequests
    
Breakpoint reached
	at com.android.server.wm.ActivityRecord.setVisibility(ActivityRecord.java:5650)
	at com.android.server.wm.ActivityRecord.setVisibility(ActivityRecord.java:5500)
	at com.android.server.wm.ActivityRecord.makeInvisible(ActivityRecord.java:6403)
	at com.android.server.wm.EnsureActivitiesVisibleHelper.setActivityVisibilityState(EnsureActivitiesVisibleHelper.java:239)
	at com.android.server.wm.EnsureActivitiesVisibleHelper.process(EnsureActivitiesVisibleHelper.java:143)
	at com.android.server.wm.TaskFragment.updateActivityVisibilities(TaskFragment.java:1153)
	at com.android.server.wm.Task.lambda$ensureActivitiesVisible$20(Task.java:5426)
	at com.android.server.wm.Task$$ExternalSyntheticLambda23.accept(D8$$SyntheticClass:-1)
	at com.android.server.wm.Task.forAllLeafTasks(Task.java:3590)
	at com.android.server.wm.Task.ensureActivitiesVisible(Task.java:5425)
	at com.android.server.wm.DisplayContent.lambda$ensureActivitiesVisible$45$com-android-server-wm-DisplayContent(DisplayContent.java:6468)
	at com.android.server.wm.DisplayContent$$ExternalSyntheticLambda38.accept(D8$$SyntheticClass:-1)
	at com.android.server.wm.Task.forAllRootTasks(Task.java:3602)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2117)
	at com.android.server.wm.DisplayContent.ensureActivitiesVisible(DisplayContent.java:6463)
	at com.android.server.wm.RootWindowContainer.ensureActivitiesVisible(RootWindowContainer.java:1911)
	at com.android.server.wm.RootWindowContainer.ensureVisibilityAndConfig(RootWindowContainer.java:1780)
	at com.android.server.wm.ActivityTaskSupervisor.realStartActivityLocked(ActivityTaskSupervisor.java:883)
	at com.android.server.wm.ActivityTaskSupervisor.startSpecificActivity(ActivityTaskSupervisor.java:1136)
	at com.android.server.wm.TaskFragment.resumeTopActivity(TaskFragment.java:1643)
	at com.android.server.wm.Task.resumeTopActivityInnerLocked(Task.java:5602)
	at com.android.server.wm.Task.resumeTopActivityUncheckedLocked(Task.java:5530)
	at com.android.server.wm.RootWindowContainer.resumeFocusedTasksTopActivities(RootWindowContainer.java:2417)
	at com.android.server.wm.RootWindowContainer.resumeFocusedTasksTopActivities(RootWindowContainer.java:2403)
	at com.android.server.wm.TaskFragment.completePause(TaskFragment.java:1908)
	at com.android.server.wm.ActivityRecord.activityPaused(ActivityRecord.java:6673)
	at com.android.server.wm.ActivityClientController.activityPaused(ActivityClientController.java:191)
	at android.app.IActivityClientController$Stub.onTransact(IActivityClientController.java:582)
	at com.android.server.wm.ActivityClientController.onTransact(ActivityClientController.java:131)
	at android.os.Binder.execTransactInternal(Binder.java:1285)
	at android.os.Binder.execTransact(Binder.java:1249)
binder:3110_20 -> add mClosingApps

addToStopping并发送idle消息

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleIdle(ActivityTaskSupervisor.java:2305)
	at com.android.server.wm.ActivityRecord.addToStopping(ActivityRecord.java:6858)
	at com.android.server.wm.ActivityRecord.makeInvisible(ActivityRecord.java:6417)
	at com.android.server.wm.EnsureActivitiesVisibleHelper.setActivityVisibilityState(EnsureActivitiesVisibleHelper.java:239)
	at com.android.server.wm.EnsureActivitiesVisibleHelper.process(EnsureActivitiesVisibleHelper.java:143)
	at com.android.server.wm.TaskFragment.updateActivityVisibilities(TaskFragment.java:1153)
	at com.android.server.wm.Task.lambda$ensureActivitiesVisible$20(Task.java:5426)
	at com.android.server.wm.Task$$ExternalSyntheticLambda23.accept(D8$$SyntheticClass:-1)
	at com.android.server.wm.Task.forAllLeafTasks(Task.java:3590)
	at com.android.server.wm.Task.ensureActivitiesVisible(Task.java:5425)
	at com.android.server.wm.DisplayContent.lambda$ensureActivitiesVisible$45$com-android-server-wm-DisplayContent(DisplayContent.java:6468)
	at com.android.server.wm.DisplayContent$$ExternalSyntheticLambda38.accept(D8$$SyntheticClass:-1)
	at com.android.server.wm.Task.forAllRootTasks(Task.java:3602)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2124)
	at com.android.server.wm.WindowContainer.forAllRootTasks(WindowContainer.java:2117)
	at com.android.server.wm.DisplayContent.ensureActivitiesVisible(DisplayContent.java:6463)
	at com.android.server.wm.RootWindowContainer.ensureActivitiesVisible(RootWindowContainer.java:1911)
	at com.android.server.wm.RootWindowContainer.ensureVisibilityAndConfig(RootWindowContainer.java:1780)
	at com.android.server.wm.ActivityTaskSupervisor.realStartActivityLocked(ActivityTaskSupervisor.java:883)
	at com.android.server.wm.ActivityTaskSupervisor.startSpecificActivity(ActivityTaskSupervisor.java:1136)
	at com.android.server.wm.TaskFragment.resumeTopActivity(TaskFragment.java:1643)
	at com.android.server.wm.Task.resumeTopActivityInnerLocked(Task.java:5602)
	at com.android.server.wm.Task.resumeTopActivityUncheckedLocked(Task.java:5530)
	at com.android.server.wm.RootWindowContainer.resumeFocusedTasksTopActivities(RootWindowContainer.java:2417)
	at com.android.server.wm.RootWindowContainer.resumeFocusedTasksTopActivities(RootWindowContainer.java:2403)
	at com.android.server.wm.TaskFragment.completePause(TaskFragment.java:1908)
	at com.android.server.wm.ActivityRecord.activityPaused(ActivityRecord.java:6673)
	at com.android.server.wm.ActivityClientController.activityPaused(ActivityClientController.java:191)
	at android.app.IActivityClientController$Stub.onTransact(IActivityClientController.java:582)
	at com.android.server.wm.ActivityClientController.onTransact(ActivityClientController.java:131)
	at android.os.Binder.execTransactInternal(Binder.java:1285)
	at android.os.Binder.execTransact(Binder.java:1249)
binder:3110_20 -> send IDLE_NOW_MSG

执行IDLE_NOW_MSG消息

因为当前执行了上面Prepare动画，所以isAnimating返回true，无法正常执行Stop流程

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.processStoppingAndFinishingActivities(ActivityTaskSupervisor.java:2164)
	at com.android.server.wm.ActivityTaskSupervisor.activityIdleInternal(ActivityTaskSupervisor.java:1519)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.activityIdleFromMessage(ActivityTaskSupervisor.java:2672)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessageInner(ActivityTaskSupervisor.java:2705)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessage(ActivityTaskSupervisor.java:2647)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.display ->com.android.settings/.MainSettings  -> animating= true

开始执行动画

// 设置mAnimation
Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.startAnimation(SurfaceAnimator.java:172)
	at com.android.server.wm.WindowContainer.startAnimation(WindowContainer.java:2861)
	at com.android.server.wm.WindowContainer$AnimationRunnerBuilder.lambda$build$4$com-android-server-wm-WindowContainer$AnimationRunnerBuilder(WindowContainer.java:4192)
	at com.android.server.wm.WindowContainer$AnimationRunnerBuilder$$ExternalSyntheticLambda4.startAnimation(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowContainer.applyAnimationUnchecked(WindowContainer.java:3322)
	at com.android.server.wm.WindowContainer.applyAnimation(WindowContainer.java:3015)
	at com.android.server.wm.ActivityRecord.applyAnimation(ActivityRecord.java:5683)
	at com.android.server.wm.AppTransitionController.applyAnimations(AppTransitionController.java:865)
	at com.android.server.wm.AppTransitionController.applyAnimations(AppTransitionController.java:1072)
	at com.android.server.wm.AppTransitionController.handleAppTransitionReady(AppTransitionController.java:293)
	at com.android.server.wm.RootWindowContainer.checkAppTransitionReady(RootWindowContainer.java:998)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:865)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:805)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:199)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:148)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:137)
	at com.android.server.wm.WindowSurfacePlacer$Traverser.run(WindowSurfacePlacer.java:79)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
com.android.settings/.MainSettings

    // 清除mNextAppTransitionRequests
    Breakpoint reached
	at com.android.server.wm.AppTransition.goodToGo(AppTransition.java:391)
	at com.android.server.wm.AppTransitionController.handleAppTransitionReady(AppTransitionController.java:307)
	at com.android.server.wm.RootWindowContainer.checkAppTransitionReady(RootWindowContainer.java:998)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:865)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:805)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:199)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:148)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:137)
	at com.android.server.wm.WindowSurfacePlacer$Traverser.run(WindowSurfacePlacer.java:79)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim -> clear mNextAppTransitionRequests

    // 清除mClosingApps
    Breakpoint reached
	at com.android.server.wm.AppTransitionController.handleAppTransitionReady(AppTransitionController.java:318)
	at com.android.server.wm.RootWindowContainer.checkAppTransitionReady(RootWindowContainer.java:998)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:865)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:805)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:199)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:148)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:137)
	at com.android.server.wm.WindowSurfacePlacer$Traverser.run(WindowSurfacePlacer.java:79)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim -> clear mClosingApps

设置resume页面为idle状态

app回调activityIdle，设置当前resume页面为idle状态并尝试stop；因为已经开始执行动画，isAnimating仍然为true，不能进行stop流程

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.processStoppingAndFinishingActivities(ActivityTaskSupervisor.java:2164)
	at com.android.server.wm.ActivityTaskSupervisor.activityIdleInternal(ActivityTaskSupervisor.java:1519)
	at com.android.server.wm.ActivityClientController.activityIdle(ActivityClientController.java:150)
	at android.app.IActivityClientController$Stub.onTransact(IActivityClientController.java:558)
	at com.android.server.wm.ActivityClientController.onTransact(ActivityClientController.java:131)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
binder:3110_16 ->com.android.settings/.MainSettings  -> animating= true

当前resume页面动画结束&窗口可见

因为上面的mStoppingActivities不为空 & allResumedActivitiesIdle & 消息队列没有IDLE_NOW_MSG消息，所以发送消息成功

// 当前resume页面窗口可见并尝试发送idle消息
Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleIdle(ActivityTaskSupervisor.java:2305)
	at com.android.server.wm.ActivityTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded(ActivityTaskSupervisor.java:2411)
	at com.android.server.wm.ActivityRecord.onWindowsVisible(ActivityRecord.java:7160)
	at com.android.server.wm.ActivityRecord.updateReportedVisibilityLocked(ActivityRecord.java:7276)
	at com.android.server.wm.WindowManagerService$4.onAppTransitionFinishedLocked(WindowManagerService.java:1298)
	at com.android.server.wm.AppTransition.notifyAppTransitionFinishedLocked(AppTransition.java:500)
	at com.android.server.wm.ActivityRecord.onAnimationFinished(ActivityRecord.java:8218)
	at com.android.server.wm.WindowContainer$$ExternalSyntheticLambda4.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:133)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.AnimatingActivityRegistry.endDeferringFinished(AnimatingActivityRegistry.java:104)
	at com.android.server.wm.AnimatingActivityRegistry.notifyAboutToFinish(AnimatingActivityRegistry.java:77)
	at com.android.server.wm.ActivityRecord.shouldDeferAnimationFinish(ActivityRecord.java:7921)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:141)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.LocalAnimationAdapter.lambda$startAnimation$0$com-android-server-wm-LocalAnimationAdapter(LocalAnimationAdapter.java:67)
	at com.android.server.wm.LocalAnimationAdapter$$ExternalSyntheticLambda0.run(D8$$SyntheticClass:-1)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim -> com.android.settings/.SubSettings -> true
android.anim -> send IDLE_NOW_MSG

    // onAnimationFinished尝试发送消息，因为同步上面堆栈已经发送成功了，所以这里不必再次发送
   Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleIdle(ActivityTaskSupervisor.java:2305)
	at com.android.server.wm.ActivityTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded(ActivityTaskSupervisor.java:2411)
	at com.android.server.wm.ActivityRecord.onAnimationFinished(ActivityRecord.java:8223)
	at com.android.server.wm.WindowContainer$$ExternalSyntheticLambda4.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:133)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.AnimatingActivityRegistry.endDeferringFinished(AnimatingActivityRegistry.java:104)
	at com.android.server.wm.AnimatingActivityRegistry.notifyAboutToFinish(AnimatingActivityRegistry.java:77)
	at com.android.server.wm.ActivityRecord.shouldDeferAnimationFinish(ActivityRecord.java:7921)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:141)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.LocalAnimationAdapter.lambda$startAnimation$0$com-android-server-wm-LocalAnimationAdapter(LocalAnimationAdapter.java:67)
	at com.android.server.wm.LocalAnimationAdapter$$ExternalSyntheticLambda0.run(D8$$SyntheticClass:-1)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim 
    android.anim -> com.android.settings/.SubSettings -> true

上个退出页面动画结束

回调ActivityRecord的 onAnimationFinished，因为上面已经存在IDLE_NOW_MSG消息，所以不必重复发送

// 设置mAnimation为null
Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.reset(SurfaceAnimator.java:402)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:131)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.LocalAnimationAdapter.lambda$startAnimation$0$com-android-server-wm-LocalAnimationAdapter(LocalAnimationAdapter.java:67)
	at com.android.server.wm.LocalAnimationAdapter$$ExternalSyntheticLambda0.run(D8$$SyntheticClass:-1)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
com.android.settings/.MainSettings
   // 回调ActivityRecord的 onAnimationFinished，因为上面已经存在IDLE_NOW_MSG消息，所以不必重复发送
Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleIdle(ActivityTaskSupervisor.java:2305)
	at com.android.server.wm.ActivityTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded(ActivityTaskSupervisor.java:2411)
	at com.android.server.wm.ActivityRecord.onAnimationFinished(ActivityRecord.java:8223)
	at com.android.server.wm.WindowContainer$$ExternalSyntheticLambda4.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:133)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.LocalAnimationAdapter.lambda$startAnimation$0$com-android-server-wm-LocalAnimationAdapter(LocalAnimationAdapter.java:67)
	at com.android.server.wm.LocalAnimationAdapter$$ExternalSyntheticLambda0.run(D8$$SyntheticClass:-1)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim -> com.android.settings/.MainSettings -> false

执行idle消息

因为上个退出页面动画结束，所以可以执行Stop流程了

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.processStoppingAndFinishingActivities(ActivityTaskSupervisor.java:2164)
	at com.android.server.wm.ActivityTaskSupervisor.activityIdleInternal(ActivityTaskSupervisor.java:1519)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.activityIdleFromMessage(ActivityTaskSupervisor.java:2672)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessageInner(ActivityTaskSupervisor.java:2705)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessage(ActivityTaskSupervisor.java:2647)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.display ->com.android.settings/.MainSettings  -> animating= false

从桌面进入App

跟上面场景相同的不再列举堆栈

Prepare动画（同）

addToStopping并发送idle消息（同）

开始执行动画

大致与上面场景相同，这里针对的是Task的动画

// 设置mAnimation，这里是Task类型
Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.startAnimation(SurfaceAnimator.java:172)
	at com.android.server.wm.WindowContainer.startAnimation(WindowContainer.java:2861)
	at com.android.server.wm.WindowContainer$AnimationRunnerBuilder.lambda$build$4$com-android-server-wm-WindowContainer$AnimationRunnerBuilder(WindowContainer.java:4192)
	at com.android.server.wm.WindowContainer$AnimationRunnerBuilder$$ExternalSyntheticLambda4.startAnimation(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowContainer.applyAnimationUnchecked(WindowContainer.java:3322)
	at com.android.server.wm.Task.applyAnimationUnchecked(Task.java:3864)
	at com.android.server.wm.WindowContainer.applyAnimation(WindowContainer.java:3015)
	at com.android.server.wm.AppTransitionController.applyAnimations(AppTransitionController.java:865)
	at com.android.server.wm.AppTransitionController.applyAnimations(AppTransitionController.java:1072)
	at com.android.server.wm.AppTransitionController.handleAppTransitionReady(AppTransitionController.java:293)
	at com.android.server.wm.RootWindowContainer.checkAppTransitionReady(RootWindowContainer.java:998)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:865)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:805)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:199)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:148)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:137)
	at com.android.server.wm.WindowSurfacePlacer$Traverser.run(WindowSurfacePlacer.java:79)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
Task{2aa5333 #7 type=home ?? U=0 visible=false visibleRequested=false mode=fullscreen translucent=true sz=1}
    
    // 清除mNextAppTransitionRequests
Breakpoint reached
	at com.android.server.wm.AppTransition.goodToGo(AppTransition.java:391)
	at com.android.server.wm.AppTransitionController.handleAppTransitionReady(AppTransitionController.java:307)
	at com.android.server.wm.RootWindowContainer.checkAppTransitionReady(RootWindowContainer.java:998)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:865)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:805)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:199)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:148)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:137)
	at com.android.server.wm.WindowSurfacePlacer$Traverser.run(WindowSurfacePlacer.java:79)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim -> clear mNextAppTransitionRequests

    // 清除mClosingApps
Breakpoint reached
	at com.android.server.wm.AppTransitionController.handleAppTransitionReady(AppTransitionController.java:318)
	at com.android.server.wm.RootWindowContainer.checkAppTransitionReady(RootWindowContainer.java:998)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:865)
	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:805)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:199)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:148)
	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:137)
	at com.android.server.wm.WindowSurfacePlacer$Traverser.run(WindowSurfacePlacer.java:79)
	at android.os.Handler.handleCallback(Handler.java:942)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.anim -> clear mClosingApps

执行IDLE_NOW_MSG消息

因为当前执行了上面Start动画，所以isAnimating返回true，无法正常执行Stop流程

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.processStoppingAndFinishingActivities(ActivityTaskSupervisor.java:2164)
	at com.android.server.wm.ActivityTaskSupervisor.activityIdleInternal(ActivityTaskSupervisor.java:1519)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.activityIdleFromMessage(ActivityTaskSupervisor.java:2672)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessageInner(ActivityTaskSupervisor.java:2705)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessage(ActivityTaskSupervisor.java:2647)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.display ->com.miui.home/.launcher.Launcher  -> animating= true

上个退出页面（Launcher）动画结束

1. 不满足allResumedActivitiesIdle条件，无法发送_IDLE_NOW_MSG_消息
2. 不满足allResumedActivitiesVisible，无法发送_PROCESS_STOPPING_AND_FINISHING_MSG_消息

// 设置mAnimation为null
Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.reset(SurfaceAnimator.java:402)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:131)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.RemoteAnimationController.onAnimationFinished(RemoteAnimationController.java:299)
	at com.android.server.wm.RemoteAnimationController.-$$Nest$monAnimationFinished(RemoteAnimationController.java:-1)
	at com.android.server.wm.RemoteAnimationController$FinishedCallback.onAnimationFinished(RemoteAnimationController.java:443)
	at android.view.IRemoteAnimationFinishedCallback$Stub.onTransact(IRemoteAnimationFinishedCallback.java:89)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
com.miui.home/.launcher.Launcher
    
   // 不满足条件，无法发送消息
Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded(ActivityTaskSupervisor.java:2414)
	at com.android.server.wm.ActivityRecord.onAnimationFinished(ActivityRecord.java:8223)
	at com.android.server.wm.WindowContainer.doAnimationFinished(WindowContainer.java:3509)
	at com.android.server.wm.WindowContainer.onAnimationFinished(WindowContainer.java:3524)
	at com.android.server.wm.WindowContainer$$ExternalSyntheticLambda4.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:133)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.RemoteAnimationController.onAnimationFinished(RemoteAnimationController.java:299)
	at com.android.server.wm.RemoteAnimationController.-$$Nest$monAnimationFinished(RemoteAnimationController.java:-1)
	at com.android.server.wm.RemoteAnimationController$FinishedCallback.onAnimationFinished(RemoteAnimationController.java:443)
	at android.view.IRemoteAnimationFinishedCallback$Stub.onTransact(IRemoteAnimationFinishedCallback.java:89)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)

当前resume页面动画结束&窗口可见

这里的线程是binder线程，不是anim
动画结束时无法发送消息，窗口可见时发送_PROCESS_STOPPING_AND_FINISHING_MSG_消息

// 当前resume页面动画结束，尝试发送消息失败，原因同上
Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded(ActivityTaskSupervisor.java:2414)
	at com.android.server.wm.ActivityRecord.onAnimationFinished(ActivityRecord.java:8223)
	at com.android.server.wm.WindowContainer.doAnimationFinished(WindowContainer.java:3509)
	at com.android.server.wm.WindowContainer.onAnimationFinished(WindowContainer.java:3524)
	at com.android.server.wm.WindowContainer$$ExternalSyntheticLambda4.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:133)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.RemoteAnimationController.onAnimationFinished(RemoteAnimationController.java:299)
	at com.android.server.wm.RemoteAnimationController.-$$Nest$monAnimationFinished(RemoteAnimationController.java:-1)
	at com.android.server.wm.RemoteAnimationController$FinishedCallback.onAnimationFinished(RemoteAnimationController.java:443)
	at android.view.IRemoteAnimationFinishedCallback$Stub.onTransact(IRemoteAnimationFinishedCallback.java:89)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)

// 发送PROCESS_STOPPING_AND_FINISHING_MSG消息
Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.scheduleProcessStoppingAndFinishingActivitiesIfNeeded(ActivityTaskSupervisor.java:2414)
	at com.android.server.wm.ActivityRecord.onWindowsVisible(ActivityRecord.java:7160)
	at com.android.server.wm.ActivityRecord.updateReportedVisibilityLocked(ActivityRecord.java:7276)
	at com.android.server.wm.WindowStateAnimator.onAnimationFinished(WindowStateAnimator.java:207)
	at com.android.server.wm.WindowState.onAnimationFinished(WindowState.java:5669)
	at com.android.server.wm.WindowContainer$$ExternalSyntheticLambda4.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.cancelAnimation(SurfaceAnimator.java:371)
	at com.android.server.wm.SurfaceAnimator.cancelAnimation(SurfaceAnimator.java:267)
	at com.android.server.wm.WindowContainer.cancelAnimation(WindowContainer.java:2886)
	at com.android.server.wm.WindowState.lambda$removeIfPossible$3(WindowState.java:2656)
	at com.android.server.wm.WindowState$$ExternalSyntheticLambda0.apply(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowState.applyInOrderWithImeWindows(WindowState.java:5253)
	at com.android.server.wm.WindowState.forAllWindows(WindowState.java:5097)
	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1720)
	at com.android.server.wm.WindowState.removeIfPossible(WindowState.java:2654)
	at com.android.server.wm.WindowState.removeIfPossible(WindowState.java:2640)
	at com.android.server.wm.WindowManagerService.removeWindow(WindowManagerService.java:2289)
	at com.android.server.wm.Session.remove(Session.java:233)
	at android.view.IWindowSession$Stub.onTransact(IWindowSession.java:694)
	at com.android.server.wm.Session.onTransact(Session.java:185)
	at android.os.Binder.execTransactInternal(Binder.java:1285)
	at android.os.Binder.execTransact(Binder.java:1249)
Thread[binder:3224_20,5,main] -> Send PROCESS_STOPPING_AND_FINISHING_MSG

执行_PROCESS_STOPPING_AND_FINISHING_MSG_消息

因为上个退出页面动画结束，所以可以执行Stop流程了

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.processStoppingAndFinishingActivities(ActivityTaskSupervisor.java:2164)
	at com.android.server.wm.ActivityTaskSupervisor.-$$Nest$mprocessStoppingAndFinishingActivities(ActivityTaskSupervisor.java:-1)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessageInner(ActivityTaskSupervisor.java:2727)
	at com.android.server.wm.ActivityTaskSupervisor$ActivityTaskSupervisorHandler.handleMessage(ActivityTaskSupervisor.java:2647)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.os.HandlerThread.run(HandlerThread.java:67)
	at com.android.server.ServiceThread.run(ServiceThread.java:46)
android.display ->com.miui.home/.launcher.Launcher  -> animating= false

设置resume页面为idle状态

app回调activityIdle，设置当前resume页面为idle状态；因为stoppping列表已经为空了

Breakpoint reached
	at com.android.server.wm.ActivityTaskSupervisor.activityIdleInternal(ActivityTaskSupervisor.java:1519)
	at com.android.server.wm.ActivityClientController.activityIdle(ActivityClientController.java:150)
	at android.app.IActivityClientController$Stub.onTransact(IActivityClientController.java:558)
	at com.android.server.wm.ActivityClientController.onTransact(ActivityClientController.java:131)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
binder:3110_16 ->com.android.settings/.MainSettings  -> animating= true

从App返回桌面

开始执行动画

Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.startAnimation(SurfaceAnimator.java:172)
	at com.android.server.wm.WindowContainer.startAnimation(WindowContainer.java:2861)
	at com.android.server.wm.WindowContainer.startAnimation(WindowContainer.java:2868)
	at com.android.server.wm.RecentsAnimationController.addAnimation(RecentsAnimationController.java:609)
	at com.android.server.wm.RecentsAnimationController.initialize(RecentsAnimationController.java:545)
	at com.android.server.wm.WindowManagerService.initializeRecentsAnimation(WindowManagerService.java:3340)
	at com.android.server.wm.RecentsAnimation.startRecentsActivity(RecentsAnimation.java:265)
	at com.android.server.wm.RecentsAnimation.startRecentsActivity(RecentsAnimation.java:175)
	at com.android.server.wm.ActivityTaskManagerService.startRecentsActivity(ActivityTaskManagerService.java:1838)
	at android.app.IActivityTaskManager$Stub.onTransact(IActivityTaskManager.java:1399)
	at com.android.server.wm.ActivityTaskManagerService.onTransact(ActivityTaskManagerService.java:5514)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
Task{80249ba #178 type=standard A=10071:com.miui.gallery.home U=0 visible=true visibleRequested=true mode=fullscreen translucent=false sz=1}

以下这一列操作：两个页面动画结束，窗口可见、addToStoppping等都是在recent动画执行结束后同步进行的

上个退出页面Task动画结束

Task动画，RecentsAnimation.onAnimationFinished触发

Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.reset(SurfaceAnimator.java:402)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:131)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.RecentsAnimationController$TaskAnimationAdapter.onRemove(RecentsAnimationController.java:1407)
	at com.android.server.wm.RecentsAnimationController.removeAnimation(RecentsAnimationController.java:635)
	at com.android.server.wm.RecentsAnimationController.cleanupAnimation(RecentsAnimationController.java:1076)
	at com.android.server.wm.WindowManagerService.cleanupRecentsAnimation(WindowManagerService.java:3366)
	at com.android.server.wm.RecentsAnimation.lambda$finishAnimation$0$com-android-server-wm-RecentsAnimation(RecentsAnimation.java:325)
	at com.android.server.wm.RecentsAnimation$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowManagerService.inSurfaceTransaction(WindowManagerService.java:8865)
	at com.android.server.wm.RecentsAnimation.finishAnimation(RecentsAnimation.java:320)
	at com.android.server.wm.RecentsAnimation.onAnimationFinished(RecentsAnimation.java:438)
	at com.android.server.wm.RecentsAnimationController$3.finish(RecentsAnimationController.java:319)
	at android.view.IRecentsAnimationController$Stub.onTransact(IRecentsAnimationController.java:299)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
    binder:3237_20 
Task{80249ba #178 type=standard A=10071:com.miui.gallery.home U=0 visible=true visibleRequested=true mode=fullscreen translucent=false sz=1}

当前resume桌面动画结束&窗口可见

RecentsAnimation.onAnimationFinished触发
mStopping列表为空，scheduleProcessStoppingAndFinishingActivitiesIfNeeded 中不发送消息

// binder线程桌面动画结束
Breakpoint reached
	at com.android.server.wm.SurfaceAnimator.reset(SurfaceAnimator.java:402)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:131)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.RecentsAnimationController$TaskAnimationAdapter.onRemove(RecentsAnimationController.java:1407)
	at com.android.server.wm.RecentsAnimationController.removeAnimation(RecentsAnimationController.java:635)
	at com.android.server.wm.RecentsAnimationController.cleanupAnimation(RecentsAnimationController.java:1076)
	at com.android.server.wm.WindowManagerService.cleanupRecentsAnimation(WindowManagerService.java:3366)
	at com.android.server.wm.RecentsAnimation.lambda$finishAnimation$0$com-android-server-wm-RecentsAnimation(RecentsAnimation.java:325)
	at com.android.server.wm.RecentsAnimation$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowManagerService.inSurfaceTransaction(WindowManagerService.java:8865)
	at com.android.server.wm.RecentsAnimation.finishAnimation(RecentsAnimation.java:320)
	at com.android.server.wm.RecentsAnimation.onAnimationFinished(RecentsAnimation.java:438)
	at com.android.server.wm.RecentsAnimationController$3.finish(RecentsAnimationController.java:319)
	at android.view.IRecentsAnimationController$Stub.onTransact(IRecentsAnimationController.java:299)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
Task{4568f09 #163 type=home I=com.miui.home/.launcher.Launcher U=0 rootTaskId=7 visible=true visibleRequested=true mode=fullscreen translucent=false sz=1}

// binder线程窗口可见
Breakpoint reached
	at com.android.server.wm.ActivityRecord.onWindowsVisible(ActivityRecord.java:7160)
	at com.android.server.wm.ActivityRecord.updateReportedVisibilityLocked(ActivityRecord.java:7276)
	at com.android.server.wm.WindowStateAnimator.onAnimationFinished(WindowStateAnimator.java:207)
	at com.android.server.wm.WindowState.onAnimationFinished(WindowState.java:5669)
	at com.android.server.wm.RecentsAnimationController.lambda$initialize$3(RecentsAnimationController.java:547)
	at com.android.server.wm.RecentsAnimationController$$ExternalSyntheticLambda6.accept(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:2733)
	at com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:2723)
	at com.android.server.wm.WindowState.applyInOrderWithImeWindows(WindowState.java:5253)
	at com.android.server.wm.WindowState.forAllWindows(WindowState.java:5097)
	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1720)
	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1720)
	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1737)
	at com.android.server.wm.RecentsAnimationController.lambda$initialize$4(RecentsAnimationController.java:546)
	at com.android.server.wm.RecentsAnimationController$$ExternalSyntheticLambda9.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$0$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:136)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.SurfaceAnimator.lambda$getFinishedCallback$1$com-android-server-wm-SurfaceAnimator(SurfaceAnimator.java:143)
	at com.android.server.wm.SurfaceAnimator$$ExternalSyntheticLambda0.onAnimationFinished(D8$$SyntheticClass:-1)
	at com.android.server.wm.RecentsAnimationController$TaskAnimationAdapter.onRemove(RecentsAnimationController.java:1407)
	at com.android.server.wm.RecentsAnimationController.removeAnimation(RecentsAnimationController.java:635)
	at com.android.server.wm.RecentsAnimationController.cleanupAnimation(RecentsAnimationController.java:1076)
	at com.android.server.wm.WindowManagerService.cleanupRecentsAnimation(WindowManagerService.java:3366)
	at com.android.server.wm.RecentsAnimation.lambda$finishAnimation$0$com-android-server-wm-RecentsAnimation(RecentsAnimation.java:325)
	at com.android.server.wm.RecentsAnimation$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:-1)
	at com.android.server.wm.WindowManagerService.inSurfaceTransaction(WindowManagerService.java:8865)
	at com.android.server.wm.RecentsAnimation.finishAnimation(RecentsAnimation.java:320)
	at com.android.server.wm.RecentsAnimation.onAnimationFinished(RecentsAnimation.java:438)
	at com.android.server.wm.RecentsAnimationController$3.finish(RecentsAnimationController.java:319)
	at android.view.IRecentsAnimationController$Stub.onTransact(IRecentsAnimationController.java:299)
	at android.os.Binder.execTransactInternal(Binder.java:1290)
	at android.os.Binder.execTransact(Binder.java:1249)
binder:3237_10 -> com.miui.home/.launcher.Launcher -> false
    // 因为Stopping列表为null，所以不发送消息
binder:3237_10 -> mStoppingActivities is null