performDraw
setView
handleResumeActivity
doTraversals
performLaunchActivity
performTraversals
挂在DecorView；进行第一次测量和布局
addView
performLayout
installDecor
ActivityThread
ViewRootImpl
WindowManagerImpl
onResume
TransactionExecutor
handleLaunchActivity
创建DecorView
handleMessage
setContentView
scheduleTransaction
AppCompatDelegateImpl
这个阶段主要是为了Activity创建PhoneWindow及Activity中属性赋值
attach
ResumeActivityItem
ApplicationThread
构造方法
performResumeActivity
execute
PhoneWindow
ensureDecor
Activity
创建ViewRootImpl关联WindowManagerService
sendMessageEXECUTE_TRANSACTION
performMeasure
LaunchActivityItem
onCreate
