Notification framework层的处理流程分析

google了一段时间发现没人写notification在framework中具体怎么实现的，感到很奇怪，是我搜索有问题？哎，不管了，反正工作需要，自己琢磨琢磨吧。
 
 
相关文件:
  framework/base/core/java/android/app/NotificationManager.java
  framework/base/services/java/com/android/server/NotificationManagerService.java{@hide} extends INotificationManager.Stub
  framework/base/services/java/com/android/server/StatusBarManagerService.java  extends IStatusBarService.Stub
 
 
  framework/base/core/java/com/android/internal/statusbar/StatusBarNotification  implements Parcelable
  framework/base/core/java/com/android/internal/statusbar/IStatusBar.aidl
  framework/base/core/java/com/android/internal/statusbar/IStatusBarService.aidl
  framework/base/core/java/com/android/internal/statusbar/StatusBarNotification.aidl
  
 
  framework/base/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarService.java extends Service implements CommandQueue.Callbacks
  framework/base/packages/SystemUI/src/com/android/systemui/statusbar/CommandQueue.java extends IStatusBar.Stub

1>.系统启动的时候：framework/base/services/java/com/android/server/SystemServer.java中：
Java代码 
 try { 
        Slog.i(TAG, "Status Bar");   
        statusBar = new StatusBarManagerService(context); 
        ServiceManager.addService(Context.STATUS_BAR_SERVICE, statusBar); 
} catch (Throwable e) { 
         Slog.e(TAG, "Failure starting StatusBarManagerService", e); 
} 
         
try { 
        Slog.i(TAG, "Notification Manager"); 
         notification = new NotificationManagerService(context, statusBar, lights); 
                       
         ServiceManager.addService(Context.NOTIFICATION_SERVICE, notification); 
} catch (Throwable e) { 
         Slog.e(TAG, "Failure starting Notification Manager", e); 
} 
  
 
  注册状态栏管理和通知管理这两个服务。
2>.在StatusBarManagerService.java中，有addNotification，removeNotification,updateNotification等方法用于管理传递给他的通知对象。这个类是一些管理方法，实际执行相关动作的是在IStatusBar.java里面，这个是framework/base/core/java/com/android/internal/statusbar/IStatusBar.aidl自动生成的用于IPC的类。