2.App的启动流程.txt

@startuml

'请先安装PlantUML plugin查看该uml

title __2.App的启动过程__

entity "Launcher"
entity AMS
entity Zygote

entity "App进程" as App
entity Activity
entity WMS


Launcher -> AMS: startActivity()
activate AMS
    AMS -> Zygote: socket通信:请求创建App进程
deactivate AMS

activate Zygote
    Zygote -> App: fork App进程
deactivate Zygote

App -> App: AppRuntime#onZygoteInit()
note left :开启binder机制

App -> App: ActivityThread.main()
note left :开启loop
activate App
    App->  AMS: attachApplication(appThread)
    note left#ccffe5 : 注册ApplicationThread，\n可以和AMS双向通信。
deactivate App

AMS -> App: thread.bindApplication();
App -> App: (Application)clazz.newInstance();
App -> App: app.attach(context);
note left :1.attachBaseContext\n2.取出mLoadedApk
App -> App: installContentProviders();
note left :1.一些第三方库会在这里做初始化
App -> App: app.onCreate();

AMS -> App: thread.scheduleTransaction()
activate App
    App -> App:handleLaunchActivity()
    activate App
        App -> Activity: (Activity)clazz.newInstance();
        App -> Activity:  attach(context, ..., application,)
        note left :1.attachBaseContext\n2.初始化Window

        App -> Activity:  onCreate()
        note left :1.installDecorView
    deactivate App

    App -> App:handleResumeActivity()
    activate App
        App -> Activity:  onResume()
        App -> WMS:  wm.addView(decorView)
        note left#ccffe5 : 注册IWindow，InputChannel，\n可以和WMS双向通信。
    deactivate App
deactivate App


@enduml