handleResumeActivity
execute
startActivity
realStartActivityLocked
system_server
IPC
scheduleTransaction
ResumeActivityItem
resumeTopActivityUncheckedLocked
ActivityStackSupervisor
resumeTopActivityInnerLocked
Activity
performLaunchActivity
1. 创建activity实例2 创建Application对象，调用了Application的onCreate方法。3. activity.attach方法。4. 调用Activity的onCreate方法
LaunchActivityItem
handMessage（切到主线程）
TransactionExecutor
H
ActivityTaskManagerService
是否有进程？
Instrumentation
1. 调用生命周期onStart、onResume2. 设置视图可见（所以视图的真正可见是在onResume方法之后）
startSpecificActivityLocked
startActivityUnchecked
handleLaunchActivity
scheduleTransaction（执行在Bind线程池）
APP
是
startActivityForResult
ApplicationThread
execStartActivity
startActivityAsUser
ActivityStack
executeCallbacks
1、ClientTransaction添加了LaunchActivityItem实例2、使用ATMS的ClientLifecycleManager的scheduleTransaction方法，发送ClientTransaction（还使用clientTransaction.setLifecycleStateRequest方法添加了ResumeActivityItem）3、内部调用了 IApplicationThread的scheduleTransaction方法，即IPC操作
executeLifecycleState
ActivityThread
ActivityStarter
