android系统从systemserver开始的launcher启动详细流程

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1、android系统启动流程android系统启动流程——从systemserver开始的launcher目录1概述:22systemserver工作内容分析32.1SystemServer类简述42.2ServerThread类简述43ActivityManagerService工作内容分析63.1ActivityManagerService之main73.1.1创建ActivityManagerService实例73.1.2创建ActivityThread实例，获取全局Context83.1.3创建ActivityStackSupervisor实例103.1.4调用st

2、artRunning103.2ActivityManagerService之setSystemProcess113.3.ActivityManagerService之setWindowManager123.4ActivityManagerService之systemready123.4.1启动所有Persistent属性的APK133.4.2启动launcher144ActivityStackSupervisor启动launcher154.1首先回顾一下ActivityStackSupervisor实例的初始化154.2进入ActivityStackSupervisor.

3、resumeTopActivitiesLocked164.3进入ActivityStack.resumeTopActivityLocked164.4回到ActivityStackSupervisor.resumeHomeActivity。174.5ActivityStackSupervisor.mProbeThread174.6ActivityStackSupervisor.mProbeHandler184.7回到ActivityManagerService.startHomeActivityLocked184.8ActivityStackSupervisor.start

4、HomeActivity194.9ActivityStackSupervisor.startActivityUncheckedLocked204.10ActivityStack.startActivityLocked2141/41android系统启动流程4.11ActivityStackSupervisor.resumeTopActivitiesLocked224.12ActivityStack.resumeTopActivityLocked224.13ActivityStackSupervisor.startSpecificActivityLocked244.14Ac

5、tivityStackSupervisor.realStartActivityLocked244.15ActivityManagerService.startProcessLocked255Process类管理创建activity进程275.1Process.start:275.2Process.startViaZygote285.3zygoteSendArgsAndGetResult和openZygoteSocketIfNeeded286ActivityThread线程类分析306.1ActivityThread.main分析306.1.1创建了looper对象和本线程

6、绑定。306.1.2创建了ActivityThread对象实例306.1.3进行attach回调316.1.4ActivityStackSupervisor.attachApplicationLocked346.1.5ActivityStackSupervisor.ensureActivitiesVisibleLocked346.2ApplicationThread内部类346.2.1ActivityThread.ApplicationThread.scheduleLaunchActivity356.2.2ActivityThread.ApplicationThread.

7、scheduleResumeActivity376.2.3发出开机完成通知387总结407.1luancher启动流程总结407.2luancher黑屏问题分析411概述:android系统启动到zygote后，系统就真正进入java世界了；而zygote启动的第一个进程是systemserver.而用户看到的第一个程序是launcher.本文要分析的正是从systemserver道launcher的启动流程.分析过程涉及到PowerManagerService,ActivityManagerService,PackageMa