Android 8.1 FreeForm切换显示异常

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} mClient=android.os.BinderProxy@4d7d272mOwnerUid=10012 mShowToOwnerOnly=true package=com.android.documentsui appop=NONEmAttrs=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=577mHasSurface=true mShownPosition=[484,90] isReadyForDisplay()=true hasSavedSurface()=false mWindowRemovalAllowed=falseWindowStateAnimator{a17f258 com.android.documentsui/com.android.documentsui.files.FilesActivity}:mAnimating=true mLocalAnimating=false mAnimationIsEntrance=false mAnimation=null mStackClip=1XForm: 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=1.5310801isOnScreen=trueisVisible=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} mClient=android.os.BinderProxy@4d7d272mOwnerUid=10012 mShowToOwnerOnly=true package=com.android.documentsui appop=NONEmAttrs=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=595mHasSurface=true mShownPosition=[480,256] isReadyForDisplay()=true hasSavedSurface()=false mWindowRemovalAllowed=falseWindowStateAnimator{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=trueisVisible=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

    @Overridepublic 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 80261794
05-30 05:13:25.298 D/RecentsActivity(       670): addOnPreDrawListener 2
05-30 05:13:25.301 D/RecentsActivity(       670): onPreDraw
//从mWindowMap 中删除 com.android.documentsui
05-30 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.endProlongedAnimation
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.systemui/com.android.systemui.recents.RecentsActivity
05-30 05:13:25.337 D/AppWindowAnimator(     497): endProlongedAnimation 43221400
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=NavigationBar
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=NavigationBar mAppAnimator is NULL
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=AssistPreviewPanel
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=AssistPreviewPanel mAppAnimator is NULL
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=DockedStackDivider
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=DockedStackDivider mAppAnimator is NULL
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.launcher3/com.android.launcher3.Launcher
05-30 05:13:25.337 D/AppWindowAnimator(     497): endProlongedAnimation 73295989
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=StatusBar
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=StatusBar mAppAnimator is NULL
05-30 05:13:25.337 D/WindowManagerService(  497): endProlongedAnimations win.mAppToken.stringName=com.android.systemui.ImageWallpaper
05-30 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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Android 8.1 FreeForm切换显示异常

平台

问题

调试

解决:

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