有关的窗口对象

PhoneWindow	ActivityThread#performLaunchActivity {Activity.attach}
Surface	new ViewRootImpl 创建null对象 mSurface.transferFrom(getOrCreateBLASTSurface())//填充内容
Layer	SurfaceFlinger::createLayer
SurfaceControl	ViewRootImpl#relayoutWindow{mSurface.copyFrom(mSurfaceControl)}  //改变Surface buffer属性
IWindowSession	new ViewRootImpl(contexst, display, WindowManagerGlobal.getWindowSession())
WindowManagerGlobal	ActivityThread#handleLaunchActivity  {WindowManagerGlobal.initialize()}

App窗口完整创建流程

Launcher#startActivity() -> SystemServer -> zygote newProcess

->App #newActivityThread.main() ->ActivityThread#handleLaunchActivity

-> ActivityThread.performLaunchActivity

{

       WindowManagerGlobal.initialize()

       newActivity().attach(context)

}

• AMS newActivityRecord.showStartingWindow()

->WindowManagerGlobal.addView(WindowManagerGlobal.setView

{
      newViewRootImpl()#performTraversals  ->  ViewRootImpl#relayoutWindow

     mWindowSession.relayout(mSurfaceControl .........

}

wms.relayout会创建SurfaceControl和Layer

创建SurfaceControl过程：

• mWindowSession.relayout(mSurfaceControl
• -> wms.createSurfaceControl()
• ->mSurfaceControl = WindowStateAnimator.createSurfaceLocked 开始创建Surface
• ->mSurface.copyFrom(mSurfaceControl)把mSurfaceControl复制到ViewRootImpl对象的mSurface里面后续操作window使用

WindowStateAnimator.createSurfaceLocked创建Surface过程：

从wms.createSurfaceLocked ~ SurfaceFlinger::createLayer如图所示

参考于：Android14 SurfaceFlinger Surface的创建_pendingbuffercounter-CSDN博客