系统相关的流程图和UML图

Bertha 。 2022-05-11 03:36 176阅读 0赞

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![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 1][] startActivity半程总结

上图补充android N以后的分支：在判断ActivityStack\#mResumedActivity是否为null前，会调用ActivityStackSupervisor\#pauseBackstacks(...),该方法会逐个去调用所有后台Stack的startPausingLocked(...)。

顺便说明一下进入startSpecificActivityLocked（）方法后，判断进程存在，则去到ASS\#realStartActivityLocked（...）

**ActivityStarter\#startActivityMayWait:**与PKMS交互获得匹配intent的ActivityInfo

**ActivityStarter\#startActivityLocked(IApplicationThread caller,...):**处理sourceRecord和resultRecord；为目标Activity创建ActivityRecord。

**ActivityStarter\#startActivityUncheck(ActivityRecord r,...)：**为ActivityRecord选择一个合适Task和Stack，或者创建一个

**AS\#startActivityLocked(AtivityRecord r, ...):**与WMS交互，处理与Activity切换动画相关的逻辑

**ASS\#resumeTopActivities(...):**调用AS\#resumeTopActivityInner(...)

**AS\#resumeTopActivityInner(...):**调用ActivityStackSupervisor\#pauseBackstacks(...),该方法会逐个去调用所有后台Stack的startPausingLocked(...)。如果mResumedActivity不为null，则调用startPausingLocked(...)。

**ASS\#startSpecificActivityLoced(...):**如果进程已存在则初始化IApplicationThread\#scheduleLaunchActivity（...）的各项参数，如果不存在则调用AMS\#startProcessLocked（...）

ASS\#realStartActivity(...):调用IApplicationThread\#scheduleLaunchActivity（...）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 2][]

startActivity后半程总结

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 3][]

startPausingActivity流程总结

**Zygote启动过程的调用流程图 ：（该图转自：**[http://gityuan.com/2016/02/13/android-zygote/][http_gityuan.com_2016_02_13_android-zygote]**）**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 4][]

**getService调用流程图：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 5][]

**startService**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 6][]

**bindService**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2IxNDgwNTIxODc0_size_16_color_FFFFFF_t_70 7][]

[70]: /images/20220511/a1036641abdd4271b9d12c2636f9e17d.png
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[http_gityuan.com_2016_02_13_android-zygote]: http://gityuan.com/2016/02/13/android-zygote/
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