平台

RK3399 + Android 8.1
调试应用: com.android.documentsui

问题

  • 切换后显示异常, 如下图所示, 窗口明显被拉伸了:
  • 正确的显示效果:

调试

dumpsys window

  • 显示异常
  Window #5 Window{82f86c3 u0 com.android.documentsui/com.android.documentsui.files.FilesActivity}:    mDisplayId=0 stackId=2 mSession=Session{8e3c127 1593:u0a10012} [email protected]    mOwnerUid=10012 mShowToOwnerOnly=true package=com.android.documentsui appop=NONE    mAttrs=WM.LayoutParams{(0,0)(fillxfill) sim=#10 ty=1 fl=#81810100 pfl=0x20000 fmt=-3 wanim=0x10302f6 vsysui=0x600 surfaceInsets=Rect(40, 40 - 40, 40) (manual) (!preservePreviousSurfaceInsets) needsMenuKey=2 colorMode=0}    Requested w=960 h=512 mLayoutSeq=577    mHasSurface=true mShownPosition=[484,90] isReadyForDisplay()=true hasSavedSurface()=false mWindowRemovalAllowed=false    WindowStateAnimator{a17f258 com.android.documentsui/com.android.documentsui.files.FilesActivity}:      mAnimating=true mLocalAnimating=false mAnimationIsEntrance=false mAnimation=null mStackClip=1      XForm: has=true hasLocal=false {alpha=1.0 matrix=[1.0, 0.0, 0.0][0.0, 1.0, 0.0][0.0, 0.0, 1.0]}      Surface: shown=true layer=21010 alpha=1.0 rect=(444.0,50.0) 1040.0 x 592.0 transform=(0.99166936, 0.0, 1.5310801, 0.0)      mGlobalScale=1.0 mDsDx=0.99166936 mDtDx=0.0 mDtDy=0.0 mDsDy=1.5310801    isOnScreen=true    isVisible=true
  • 正常显示
  Window #5 Window{82f86c3 u0 com.android.documentsui/com.android.documentsui.files.FilesActivity}:    mDisplayId=0 stackId=2 mSession=Session{8e3c127 1593:u0a10012} [email protected]    mOwnerUid=10012 mShowToOwnerOnly=true package=com.android.documentsui appop=NONE    mAttrs=WM.LayoutParams{(0,0)(fillxfill) sim=#10 ty=1 fl=#81810100 pfl=0x20000 fmt=-3 wanim=0x10302f6 vsysui=0x600 surfaceInsets=Rect(40, 40 - 40, 40) (manual) (!preservePreviousSurfaceInsets) needsMenuKey=2 colorMode=0}    Requested w=960 h=512 mLayoutSeq=595    mHasSurface=true mShownPosition=[480,256] isReadyForDisplay()=true hasSavedSurface()=false mWindowRemovalAllowed=false    WindowStateAnimator{a17f258 com.android.documentsui/com.android.documentsui.files.FilesActivity}:      Surface: shown=true layer=21010 alpha=1.0 rect=(440.0,216.0) 1040.0 x 592.0 transform=(1.0, 0.0, 1.0, 0.0)    isOnScreen=true    isVisible=true

从近期任务切换为FreeForm模式:

com.android.server.am.ActivityManagerService.startActivityFromRecents(ActivityManagerService.java:4935)com.android.server.am.ActivityStackSupervisor.startActivityFromRecentsInner(ActivityStackSupervisor.java:4882)com.android.server.wm.WindowManagerService.continueSurfaceLayout(WindowManagerService.java:2979)com.android.server.wm.WindowSurfacePlacer.continueLayout(WindowSurfacePlacer.java:126)com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:135)com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:145)com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:197)com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:608)com.android.server.wm.RootWindowContainer.applySurfaceChangesTransaction(RootWindowContainer.java:865)com.android.server.wm.DisplayContent.applySurfaceChangesTransaction(DisplayContent.java:2784)com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:633)com.android.server.wm.DisplayContent.forAllWindows(DisplayContent.java:1533)com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:616)com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:616)com.android.server.wm.WindowState.forAllWindows(WindowState.java:4034)com.android.server.wm.WindowState.applyInOrderWithImeWindows(WindowState.java:4127)com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:777)com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:779)
  • AppWindowAnimator.java
com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:623)com.android.server.wm.WindowSurfacePlacer.handleAppTransitionReadyLocked(WindowSurfacePlacer.java:344)com.android.server.wm.WindowSurfacePlacer.handleOpeningApps(WindowSurfacePlacer.java:404)com.android.server.wm.AppWindowToken.setVisibility(AppWindowToken.java:372)com.android.server.wm.WindowManagerService.applyAnimationLocked(WindowManagerService.java:2435)com.android.server.wm.AppWindowAnimator.setAnimation(AppWindowAnimator.java:127)

在APP切换动画启动后,

DisplayContent WindowSta applySurfaceChangesTransaction computeShownFrameLocked DisplayContent WindowSta

  • WindowStateAnimator中计算并重新设置上面dump出来的相关变量: mShownPosition 和 transform

  • 问题的根源在于 startProlongAnimation 调用了, 但 endProlongedAnimation 却迟迟未调用, 导致动画被无限推后, mShownPosition 和 transform 也一直无变化:

  • AppWindowAnimator

    /**     * Sometimes we need to synchronize the first frame of animation with some external event, e.g.     * Recents hiding some of its content. To achieve this, we prolong the start of the animaiton     * and keep producing the first frame of the animation.     */    private long getAnimationFrameTime(Animation animation, long currentTime) {        if (mProlongAnimation == PROLONG_ANIMATION_AT_START) {            animation.setStartTime(currentTime);            return currentTime + 1;        }        return currentTime;    }    private boolean stepAnimation(long currentTime) {        if (animation == null) {            return false;        }        transformation.clear();        final long animationFrameTime = getAnimationFrameTime(animation, currentTime);...}void startProlongAnimation(int prolongType) {        if(!ffNoCaption)mProlongAnimation = prolongType;        mClearProlongedAnimation = false;    }    void endProlongedAnimation() {        mProlongAnimation = PROLONG_ANIMATION_DISABLED;    }
RecentsActivity WindowMana AppWindowAnimator endProlongedAnimations endProlongedAnimations endProlongedAnimation RecentsActivity WindowMana AppWindowAnimator
  • WindowManagerService.java
    @Override    public void endProlongedAnimations() {        synchronized (mWindowMap) {            for (final WindowState win : mWindowMap.values()) {                final AppWindowToken appToken = win.mAppToken;                if (appToken != null && appToken.mAppAnimator != null) {                    appToken.mAppAnimator.endProlongedAnimation();                }            }            mAppTransition.notifyProlongedAnimationsEnded();        }    }

加上调试LOG后输出:

//开始切换:05-30 05:13:25.287 D/AppWindowAnimator      497): startProlongAnimation 8026179405-30 05:13:25.298 D/RecentsActivity(       670): addOnPreDrawListener 205-30 05:13:25.301 D/RecentsActivity(       670): onPreDraw//从mWindowMap 中删除 com.android.documentsui05-30 05:13:25.309 D/WindowManagerService(  497): postWindowRemoveCleanupLocked remove com.android.documentsui/com.android.documentsui.files.FilesActivity05-30 05:13:25.336 D/RecentsActivity(       670): Recents.getSystemServices().endProlongedAnimations();//开始遍历并调用 AppWindowAnimator.endProlongedAnimation05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.systemui/com.android.systemui.recents.RecentsActivity05-30 05:13:25.337 D/AppWindowAnimator(     497): endProlongedAnimation 4322140005-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=NavigationBar05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=NavigationBar mAppAnimator is NULL05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=AssistPreviewPanel05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=AssistPreviewPanel mAppAnimator is NULL05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=DockedStackDivider05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=DockedStackDivider mAppAnimator is NULL05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.launcher3/com.android.launcher3.Launcher05-30 05:13:25.337 D/AppWindowAnimator(     497): endProlongedAnimation 7329598905-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=StatusBar05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=StatusBar mAppAnimator is NULL05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.systemui.ImageWallpaper05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.systemui.ImageWallpaper mAppAnimator is NULL//重新将 com.android.documentsui 加入 mWindowMap 中05-30 05:13:25.404 D/WindowManagerService(  497): addWindow com.android.documentsui/com.android.documentsui.files.FilesActivity

从调试的LOG看, 对应com.android.documentsui的Window在循环调用 AppWindowAnimator.endProlongedAnimation时, 完美地错过了…

解决:

  • frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java
    public int addWindow(Session session, IWindow client, int seq,            WindowManager.LayoutParams attrs, int viewVisibility, int displayId,            Rect outContentInsets, Rect outStableInsets, Rect outOutsets,            InputChannel outInputChannel) {        int[] appOp = new int[1];        int res = mPolicy.checkAddPermission(attrs, appOp);//...省略代码...            } else if (rootType >= FIRST_APPLICATION_WINDOW && rootType <= LAST_APPLICATION_WINDOW) {                atoken = token.asAppWindowToken();//增加代码if(atoken != null && atoken.mAppAnimator != null){atoken.mAppAnimator.endProlongedAnimation();}//....省略代码....

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