android 动画原理分析

一
android 动画分为app内的view动画和系统动画
基本原理都是监听Choreographer的doframe回调

二
app端的实现是主要通过AnimationUtils来实现具体属性的变化通过invilate来驱动
wms来进行更新。这个流程是在app进程完成

这里不是我分析的重点
直接来看下系统动画里面的本地动画：app启动动画，这个流程是在系统进程完成
这里分成三个部分的流程：
动画的触发，动画的加载，动画的启动，动画的关闭。

这里大概写下流程，下面有具体的调用堆栈
1 触发 ams.attachapplicaton---activitystack.minimalresumeactivitylocked---rootwindowcontainner--displaycontent
---wms.requestTraversal--mService.mAnimationHandler.post(mPerformSurfacePlacement);(post 一个runnable消息给wms)

2 启动
---rootwindowcontainer---performsurfaceplacementnotrace------apptransitioncontroller.applyanimations---
---windowcontainer.applyanimationunchecked -----surfaceanimator.startanimation--(创建leash然后Transaction.reparent(surface,leash))
---localanimationadapter(animationadapter的父类)---surfaceanimationrunner.startanimation--mChoreographer.postFramecallback
3 关闭
  windowcontainer循环完后，调用wms的onAnimationfinished。

三

详细动画执行流程
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.SurfaceAnimationRunner.startAnimation(SurfaceAnimationRunner.java:139)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.LocalAnimationAdapter.startAnimation(LocalAnimationAdapter.java:55)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.SurfaceAnimator.startAnimation(SurfaceAnimator.java:160)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.startAnimation(WindowContainer.java:2128)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowState.startAnimation(WindowState.java:5222)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowState.startMoveAnimation(WindowState.java:5218)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowState.handleWindowMovedIfNeeded(WindowState.java:2090)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.DisplayContent.lambda$new$8$DisplayContent(DisplayContent.java:884)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.-$$Lambda$DisplayContent$qxt4izS31fb0LF2uo_OF9DMa7gc.accept(Unknown Source:4)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:2003)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:1993)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowState.applyInOrderWithImeWindows(WindowState.java:4672)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowState.forAllWindows(WindowState.java:4571)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.ActivityRecord.forAllWindowsUnchecked(ActivityRecord.java:3632)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.ActivityRecord.forAllWindows(ActivityRecord.java:3627)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.TaskDisplayArea.forAllWindows(TaskDisplayArea.java:511)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1310)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1327)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.DisplayContent.applySurfaceChangesTransaction(DisplayContent.java:4010)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.RootWindowContainer.applySurfaceChangesTransaction(RootWindowContainer.java:1074)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:854)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:811)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:178)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:127)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:116)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.DisplayContent.layoutAndAssignWindowLayersIfNeeded(DisplayContent.java:3384)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.wm.WindowManagerService$H.handleMessage(WindowManagerService.java:5268)
01-01 14:48:34.775  1039  1153 I yang111 :     at android.os.Handler.dispatchMessage(Handler.java:106)
01-01 14:48:34.775  1039  1153 I yang111 :     at android.os.Looper.loop(Looper.java:223)
01-01 14:48:34.775  1039  1153 I yang111 :     at android.os.HandlerThread.run(HandlerThread.java:67)
01-01 14:48:34.775  1039  1153 I yang111 :     at com.android.server.ServiceThread.run(ServiceThread.java:44)

二 动画执行循环流程
01-01 14:39:38.477  1079  1150 I yang    :     at com.android.server.wm.SurfaceAnimationRunner.startAnimationLocked(SurfaceAnimationRunner.java:182)
01-01 14:39:38.477  1079  1150 I yang    :     at com.android.server.wm.SurfaceAnimationRunner.startPendingAnimationsLocked(SurfaceAnimationRunner.java:173)
01-01 14:39:38.477  1079  1150 I yang    :     at com.android.server.wm.SurfaceAnimationRunner.startAnimations(SurfaceAnimationRunner.java:248)
01-01 14:39:38.477  1079  1150 I yang    :     at com.android.server.wm.SurfaceAnimationRunner.lambda$9Wa9MhcrSX12liOouHtYXEkDU60(Unknown Source:0)
01-01 14:39:38.477  1079  1150 I yang    :     at com.android.server.wm.-$$Lambda$SurfaceAnimationRunner$9Wa9MhcrSX12liOouHtYXEkDU60.doFrame(Unknown Source:2)
01-01 14:39:38.477  1079  1150 I yang    :     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:970)
01-01 14:39:38.477  1079  1150 I yang    :     at android.view.Choreographer.doCallbacks(Choreographer.java:796)
01-01 14:39:38.477  1079  1150 I yang    :     at android.view.Choreographer.doFrame(Choreographer.java:727)
01-01 14:39:38.477  1079  1150 I yang    :     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
01-01 14:39:38.477  1079  1150 I yang    :     at android.os.Handler.handleCallback(Handler.java:938)
01-01 14:39:38.477  1079  1150 I yang    :     at android.os.Handler.dispatchMessage(Handler.java:99)
01-01 14:39:38.477  1079  1150 I yang    :     at android.os.Looper.loop(Looper.java:223)
01-01 14:39:38.477  1079  1150 I yang    :     at android.os.HandlerThread.run(HandlerThread.java:67)
01-01 14:39:38.477  1079  1150 I yang    :     at com.android.server.ServiceThread.run(ServiceThread.java:44)