一、Android 应用启动调用的方法如下，稍后更新时序图：
startActivity(Activity) ---> startActivityForResult(Activity)--->execStartActivity(Instrumentation) --->
startActivity(AMS) ---> startActivityMayWait(ActivityStackSuperVisor) ---> startActivityLocked(ActivityStackSuperVisor) --->
startActivityUncheckedLocked(ActivityStackSuperVisor) launchMode ---> startActivityLocked(ActivityStack) ---> resumeTopActivitiesLocked(ActivityStackSuperVisor) --->resumeTopActivityLocked(ActivityStack) ---> resumeTopActivityInnerLocked(ActivityStack) finish stack options ---> startPausingLocked(ActivityStack)
---> schedulePauseActivity(ActivityThread) ---> handlePauseActivity(ActivityThread) ---> activityPaused(AMS) --->completePauseLocked(AMS)
---> resumeTopActivitiesLocked(ActivityStackSuperVisor) ---> startSpecificActivityLocked(ActivityStackSuperVisor) ---> startProcessLocked(AMS) ---> newProcessRecordLocked()
---> Process.start() ---> main(ActivityThread) ---> attach(ActivityThread) ---> attachApplication(AMS) ---> attachApplicationLocked(AMS) --->attachApplicationLocked(ActivityStackSuperVisor) ---> realStartActivityLocked(ActivityStackSuperVisor) ---> scheduleLaunchActivity(ActivityThread) ---> handleLaunchActivity(ActivityThread)
---> performLaunchActivity ---> handleResumeActivity ---> performResumeActivity
