activity为例总结大致流程：
create activity并create 布局，window（phonewindow)
activity resume调用之时把window添加到display才能显示，window添加到display过程：
new viewrootimpl
mWindowSession.addToDisplayAsUser(mWindow
wms.createSurfaceControl
WindowStateAnimator.createSurface
SurfaceFlinger::createLayer
有关的窗口对象
| PhoneWindow | ActivityThread#performLaunchActivity {Activity.attach} |
| Surface |
|
| Layer | SurfaceFlinger::createLayer |
| RenderSurface | SurfaceFlinger gpu合成layer之后的数据管理类 |
| FramebufferSurface | Framebuffer管理类，负责消费合成的layer数据，送显 |
| 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 AMS#startActivity -> zygote newProcess
->App #newActivityThread.main() -> ActivityThread#handleLaunchActivity
-> ActivityThread.performLaunchActivity
{
WindowManagerGlobal.initialize()
newActivity().attach(context)
}
->ActivityThread#handleResumeActivity->wm.addView(decor
->WindowManagerGlobal.addView(WindowManagerGlobal.setView
{
new ViewRootImpl()#setView -> requestlayout -> performTraversals -> relayoutWindow() ->
mWindowSession.relayout(mSurfaceControl -> wms.relayout 开始创建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
wms.createSurfaceLocked 调用 SurfaceComposerClient::createSurface 通知SurfaceFlinger创建一个surface，Surface创建详细流程 App申请Surface流程（Android12 ）-CSDN博客
部分资料参考于：Android14 SurfaceFlinger Surface的创建_pendingbuffercounter-CSDN博客