Activity启动过程

内部类

AcvitityManager

getRunningServices(int maxNum)

ActivityManagerProxy

+startActivity()

boolean transact() {onTransact();}

IActivityManager

IInterface

//mRemote为ActivityManagerNativemRemote.transact();

startActivity流程1. Activity.java: Activity.startActivity()2.Instrumentation.execStartActivity()3.ActivityManagerNative.getDefault().startActivity()4. mRemote.transact();5.ActivityManagerNative.onTransact()6. ActivityManagerService.startActivity()7.ActivityManagerService.startActivityAsUser8.ActivityStackSupervisor.startActivityMayWait9.ActivityStackSupervisor.startActivityLocked10.ActivityStackSupervisor.startActivityUncheckedLocked

Binder

transact()

IBinder

ActivityManagerService

+getDefault()方法实际返回的：ActivityManagerProxy+onTransact()

ActivityManagerNative

绿色为SDK中开放给开发人员的api接口蓝色为代理红色为真正的实现类