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Android 11 Display System源码分析（8）：WMS之Window显示流程分析.md

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Android 11 Display System源码分析（8）：WMS之Window显示流程分析（V1）
Display
Display
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20230216
2023-02-16 08:16:16 -0800

注：文章都是通过阅读各位前辈总结的资料、Android 11 Rockchip平台源码、加上自己的思考分析总结出来的，其中难免有理解不对的地方，欢迎大家批评指正。文章为个人学习、研究、欣赏之用，图文内容整理自互联网，如有侵权，请联系删除（◕‿◕），转载请注明出处（©Rockchip ©Android @Linux 版权所有），谢谢。

（==文章基于 Android 11.0==）

【zhoujinjian.com博客原图链接】

【开发板】

【开发板 源码链接】

正是由于前人的分析和总结，帮助我节约了大量的时间和精力，特别感谢，由于不喜欢图片水印，去除了水印，敬请谅解！！！

zhoujinjian.com

==源码（部分）==：

xxx

==源码（部分）==：

（一）、Window添加过程(App->WMS)

（1）、Activity.setContentView()

image-20221018100735157

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（2）、ViewRootImpl.init()

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（3）、ViewRootImpl.setView()image-20221019110540837

（4）、WindowManagerGlobal.getWindowSession().addToDisplayAsUser()

image-20221019110737565

（5）、WindowManagerService.addWindow()

image-20221019114118714

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（6）、WindowState.attach()

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（7）、WindowState.assignLayer()

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（二）、App测量布局与绘制

（1）、ViewRootImpl.relayoutWindow()

image-20221019140312543

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10-19 11:32:42.728  1758  1758 V ViewRootImpl[]: relayout: frame=[0,0][1920,952] cutout=DisplayCutout{insets=Rect(0, 0 - 0, 0) waterfall=Insets{left=0, top=0, right=0, bottom=0} boundingRect={Bounds=[Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0), Rect(0, 0 - 0, 0)]}} surface=Surface(name=null)/@0x86fcceb
10-19 11:32:42.728  1758  1758 V ViewRootImpl: Relayout returned: frame=Rect(0, 0 - 1920, 952), surface=Surface(name=null)/@0x86fcceb
10-19 11:32:44.076   947  1162 V WindowManager: Relayout Window{6a1de98 u10 com.chinatsp.launcher/com.chinatsp.launcher.view.Launcher}: viewVisibility=0 req=1920x1080 {(0,0)(fillxfill) sim={adjust=nothing forwardNavigation} ty=BASE_APPLICATION wanim=0x1030301
10-19 11:32:44.076   947  1162 W WindowManager: setLayoutNeeded: callers=com.android.server.wm.WindowState.setDisplayLayoutNeeded:2576 com.android.server.wm.WindowManagerService.relayoutWindow:2258 com.android.server.wm.Session.relayout:213 
10-19 11:32:44.076   947  1162 W WindowManager: setLayoutNeeded: callers=com.android.server.wm.WindowState.setDisplayLayoutNeeded:2576 com.android.server.wm.WindowManagerService.relayoutWindow:2258 com.android.server.wm.Session.relayout:213 
10-19 11:32:44.076   947  1162 V RootWindowContainer: performSurfacePlacementInner: entry. Called by com.android.server.wm.RootWindowContainer.performSurfacePlacement:814 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop:178 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement:127 com.android.server.wm.WindowManagerService.relayoutWindow:2289 com.android.server.wm.Session.relayout:213 
10-19 11:32:44.076   947  1162 V RootWindowContainer: performSurfacePlacementInner: entry. Called by com.android.server.wm.RootWindowContainer.performSurfacePlacement:814 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop:178 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement:127 com.android.server.wm.WindowManagerService.relayoutWindow:2289 com.android.server.wm.Session.relayout:213 
    
    
10-19 11:32:44.079   947  1162 V DisplayPolicy: Compute frame com.chinatsp.launcher/com.chinatsp.launcher.view.Launcher: sim=#130 attach=null type=1 flags=0x81110100 pf=[0,0][1920,1080] df=[0,0][1920,1080] cf=[0,0][1920,1080] vf=[0,0][1920,1080] dcf=[0,0][1920,1080] sf=[0,116][1920,952]
10-19 11:32:44.079   947  1162 I WindowState: com.chinatsp.launcher
10-19 11:32:44.079   947  1162 I WindowState: java.lang.RuntimeException: here
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowState.computeFrameLw(WindowState.java:1267)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowState.computeFrame(WindowState.java:1048)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.DisplayPolicy.layoutWindowLw(DisplayPolicy.java:2695)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.DisplayContent.lambda$new$4$DisplayContent(DisplayContent.java:755)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.-$$Lambda$DisplayContent$qT01Aq6xt_ZOs86A1yDQe-qmPFQ.accept(Unknown Source:4)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:1984)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer$ForAllWindowsConsumerWrapper.apply(WindowContainer.java:1974)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowState.applyInOrderWithImeWindows(WindowState.java:4668)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowState.forAllWindows(WindowState.java:4567)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.ActivityRecord.forAllWindowsUnchecked(ActivityRecord.java:3638)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.ActivityRecord.forAllWindows(ActivityRecord.java:3633)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.TaskDisplayArea.forAllWindows(TaskDisplayArea.java:488)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1302)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowContainer.forAllWindows(WindowContainer.java:1319)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.DisplayContent.performLayoutNoTrace(DisplayContent.java:4136)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.DisplayContent.performLayout(DisplayContent.java:4096)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.DisplayContent.applySurfaceChangesTransaction(DisplayContent.java:3989)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.RootWindowContainer.applySurfaceChangesTransaction(RootWindowContainer.java:1077)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.RootWindowContainer.performSurfacePlacementNoTrace(RootWindowContainer.java:857)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.RootWindowContainer.performSurfacePlacement(RootWindowContainer.java:814)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop(WindowSurfacePlacer.java:178)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement(WindowSurfacePlacer.java:127)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.WindowManagerService.relayoutWindow(WindowManagerService.java:2289)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.Session.relayout(Session.java:213)
10-19 11:32:44.079   947  1162 I WindowState: 	at android.view.IWindowSession$Stub.onTransact(IWindowSession.java:840)
10-19 11:32:44.079   947  1162 I WindowState: 	at com.android.server.wm.Session.onTransact(Session.java:139)
10-19 11:32:44.079   947  1162 I WindowState: 	at android.os.Binder.execTransactInternal(Binder.java:1159)
10-19 11:32:44.079   947  1162 I WindowState: 	at android.os.Binder.execTransact(Binder.java:1123)
10-19 11:32:44.079   947  1162 V WindowState: Resolving (mRequestedWidth=1920, mRequestedheight=1080) to (pw=1920, ph=1080): frame=[0,0][1920,1080] ci=[0,0][0,0] vi=[0,0][0,0] si=[0,116][0,128] com.chinatsp.launcher/com.chinatsp.launcher.view.Launcher

（2）、DisplayPolicy.layoutWindowLw()

WMS决定App最终显示大小。

image-20221019141032821

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（3）、WindowManagerService.createSurfaceControl()

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（4）、WindowState.prepareSurfaces()

image-20221019142109914

WindowAnimator属于WMS的。

image-20221019142334704

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此时Launcher还未draw完成，未显示。Surface已经准备好。接下来由App测量布局与绘制了。

image-20221019142701745

（5）、ViewRootImpl .measureHierarchy()

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（6）、ViewRootImpl.performLayout()

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（7）、ViewRootImpl.draw()

image-20221019135919097

底层绘制完成后会回调。

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10-19 11:32:44.283  3063  3063 V ViewRootImpl[Launcher]: FINISHED DRAWING: com.chinatsp.launcher/com.chinatsp.launcher.view.Launcher

image-20221019170806109

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（三）、WMS显示

（1）、RootWindowContainer.applySurfaceChangesTransaction()

image-20221019155136333

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（四）、参考资料(特别感谢)：

（1）xxx