Android源码——Activity进程内启动

进程内启动Activity

1. MainActivity组件向ActivityManagerService发送一个启动SubActivityInProcess组件的进程间通信请求；
2. ActivityManagerService首先将要启动的SubActivityInProcess组件的信息保存下来，然后再向MainActivity组件发送一个进入终止状态的进程间通信请求；
3. MainActivity组件进入到中止状态后，向ActivityManagerService发送一个已进入中止状态的进程间通信请求，以便ActivityManagerService可以继续执行启动SubActivityInProcess组件的操作；
4. ActivityManagerService发现用来运行SubActivityInProcess组件的应用程序已经存在，将第2步保存下来的SubActivityInProcess组件信息发送给应用程序进程，以便它可以将SubActivityInProcess组件启动起来；
5. ActivityManagerProxy.startActivity
6. ActivityManagerService.startActivity
7. ActivityStack.startActivityMayWait
8. ActivityStack.startActivityLocked
9. ActivityStack.startActivityUncheckedLocked
10. ActivityStack.resumeTopActivityLocked
11. ActivityStack.startPausingLocked
12. ApplicationThreadProxy.schedulePauseActivity
13. ApplicationThread.schedulePauseActivity
14. ActivityThread.queueOrSendMessage
15. H.handleMessage
16. ActivityThread.handlePauseActivity
17. ActivityManagerProxy.activityPaused
18. ActivityManagerService.activityPaused
19. ActivityStack.activityPaused
20. ActivityStack.completePauseLocked
21. ActivityStack.resumeTopActivityLocked
22. ActivityStack.startSpecificActivityLocked
23. ActivityStack.realStartActivityLocked
24. ApplicationThreadProxy.scheduleLaunchActivity
25. ApplicationThread.scheduleLaunchActivity
26. ApplicationThread .queueOrSendMessage
27. H.handleMessage
28. ActivityThread.handleLaunchActivity
29. ActivityThread.performLaunchActivity
30. SubActivityInProcess.onCreate

 

新进程中启动Activity