Notifications通知到SystemUI（“Notifications 通知”拆解）

Posted 2022-02-10 xhBruce

Notifications通知到SystemUI（“Notifications 通知”拆解）

android12-release

APP请求系统通知(“Notifications 通知”拆解)
SystemUI启动，及其SystemUIService启动

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SystemUIService中StatusBar注册NotificationListener

com.android.systemui.statusbar.phone.StatusBar

SystemUI传递过来的Context

frameworks/base/core/java/android/service/notification/NotificationListenerService.java

• mSystemContext = context : SystemUI传递过来的Context
• getNotificationInterface获取NotificationListenerService接口代理，经过binder调用
• mHandler = new MyHandler(context.getMainLooper()) 这个MyHandler运行在SystemUI进程
• noMan.registerListener向system_server进程中的NotificationListenerService注册监听器;
• APP请求系统通知(“Notifications 通知”拆解) 是NotificationListenerWrapper.onNotificationPosted过程是运行在SystemUI进程（即调用NotificationListenerService中NotificationListenerWrapper实例对象的onNotificationPosted()）
  

NotificationEntryManager.java：SystemUI显示/更新Notification

APP请求系统通知(“Notifications 通知”拆解)通知到SystemUI监听
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/NotificationListener.java

frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationEntryManager.java中注册