Broadcast.puml

@startuml

box "ClientSender" #LightBlue
	participant Context
	participant ContextImpl
	participant ActivityManagerNative
end box

box "system_server" #LightGreen
	participant ActivityManagerService
	participant BroadcastQueue
	participant IApplicationThread
	participant ApplicationThreadProxy
end box

box "ClientReceiver process" #Gray
	participant ApplicationThreadNative
	participant ApplicationThread
	participant BroadcastReceiver
	participant ReceiverData
end box

note left of Context
本图为Android系统中，应用发送广播到广播被接收的处理过程
endnote

note left of Context
在VA中安装应用时，已经解析应用的AndroidManifests.xml
中所有receiver，分别注册到VA应用中，并修改了ACTION。
因此对应的广播发送程序也需要安装到VA中。

本图做如下说明：
ClientSender，广播发送应用
ClientReceiver，广播接收应用
endnote

[-> Context : sendBroadcast

activate Context

    Context -> ContextImpl : sendBroadcast
    activate ContextImpl

        ContextImpl -> ActivityManagerNative : sendBroadcast
        activate ActivityManagerNative
            ActivityManagerNative -> ActivityManagerService : broadcastIntent
            activate ActivityManagerService
                ActivityManagerService -> ActivityManagerService : broadcastIntentLocked
                activate ActivityManagerService
                    ActivityManagerService -> BroadcastQueue : scheduleBroadcastsLocked
                    activate BroadcastQueue
                        BroadcastQueue -> BroadcastQueue : sendMessage(BROADCAST_INTENT_MSG)
                        activate BroadcastQueue
                        deactivate BroadcastQueue
                    deactivate BroadcastQueue
                deactivate ActivityManagerService
            deactivate ActivityManagerService
        deactivate ActivityManagerNative
    deactivate ContextImpl

[<- Context
deactivate Context

...
BroadcastQueue -> BroadcastQueue : handleMessage
activate BroadcastQueue
    BroadcastQueue -> BroadcastQueue : processNextBroadcast
    activate BroadcastQueue

        note over BroadcastQueue : 动态receiver
        BroadcastQueue -> BroadcastQueue : deliverToRegisteredReceiverLocked
        activate BroadcastQueue
            BroadcastQueue -> BroadcastQueue : performReceiveLocked
            activate BroadcastQueue
                BroadcastQueue -> IApplicationThread : scheduleRegisteredReceiver
                activate IApplicationThread
                    IApplicationThread -> ApplicationThreadProxy : scheduleRegisteredReceiver
                    activate ApplicationThreadProxy
                        ApplicationThreadProxy -> ApplicationThreadNative : scheduleRegisteredReceiver
                        activate ApplicationThreadNative
                        note over ApplicationThreadProxy
                        这里使用了ONEWAY关键字，因此这条binder调用是异步执行的
                        endnote
                        deactivate ApplicationThreadNative
                    deactivate ApplicationThreadProxy
                deactivate IApplicationThread
            deactivate BroadcastQueue
        deactivate BroadcastQueue

            ...
            ApplicationThreadNative -> ApplicationThreadNative : scheduleRegisteredReceiver
            activate ApplicationThreadNative
                ApplicationThreadNative -> ApplicationThread : scheduleRegisteredReceiver
                activate ApplicationThread

                deactivate ApplicationThread
            deactivate ApplicationThreadNative


        note over BroadcastQueue : 静态receiver，所属进程已创建
        BroadcastQueue -> BroadcastQueue : processCurBroadcastLocked
        activate BroadcastQueue
            BroadcastQueue -> IApplicationThread : scheduleReceiver
                activate IApplicationThread
                    IApplicationThread -> ApplicationThreadProxy : scheduleRegisteredReceiver
                    activate ApplicationThreadProxy
                        ApplicationThreadProxy -> ApplicationThreadNative : scheduleRegisteredReceiver
                        activate ApplicationThreadNative
                        note over ApplicationThreadProxy
                        这里使用了ONEWAY关键字，因此这条binder调用是异步执行的
                        endnote
                        deactivate ApplicationThreadNative
                    deactivate ApplicationThreadProxy
                deactivate IApplicationThread
            deactivate IApplicationThread
        deactivate BroadcastQueue

            ...
            ApplicationThreadNative -> ApplicationThreadNative : scheduleReceiver
            activate ApplicationThreadNative
                ApplicationThreadNative -> ApplicationThread : scheduleReceiver
                activate ApplicationThread
                    ApplicationThread -> ApplicationThread : sendMessage(RECEIVER)
                deactivate ApplicationThread
            deactivate ApplicationThreadNative

            ...
            ApplicationThread -> ApplicationThread : handleMessage(RECEIVER)
            activate ApplicationThread
                ApplicationThread -> ApplicationThread : handleReceiver
                activate ApplicationThread

                    ApplicationThread <-- BroadcastReceiver : 反射创建receiver
                    activate BroadcastReceiver
                    deactivate BroadcastReceiver

                    note over ApplicationThread
                    在这里处理使用反射创建xml中定义的的静态receiver类，
                    并回调onReceive方法
                    endnote

                    ApplicationThread -> BroadcastReceiver : onReceive
                    activate BroadcastReceiver
                    deactivate BroadcastReceiver

                    ApplicationThread -> ReceiverData : finish
                    activate ReceiverData
                        ReceiverData -> ActivityManagerService : finishReceiver
                        activate ActivityManagerService
                        note over ActivityManagerService
                        这里继续调用r.queue.processNextBroadcast(false);
                        处理下一条广播
                        endnote
                        deactivate ActivityManagerService
                    deactivate ReceiverData
                deactivate ApplicationThread

            deactivate ApplicationThread

        note over BroadcastQueue : 静态receiver，所属进程未创建
        BroadcastQueue -> BroadcastQueue : processCurBroadcastLocked
        activate BroadcastQueue
        deactivate BroadcastQueue
    deactivate BroadcastQueue
deactivate BroadcastQueue


@enduml