Notification framework层的处理流程分析(4)

        } 
 
 最终执行状态栏更新通知等事件都是在实现的CommandQueue.Callbacks里面执行。还是以addNotification为例：
 
Java代码 
public void addNotification(IBinder key, StatusBarNotification notification) { 
        boolean shouldTick = true; 
        if (notification.notification.fullScreenIntent != null) { 
            shouldTick = false; 
            Slog.d(TAG, "Notification has fullScreenIntent; sending fullScreenIntent"); 
            try { 
                notification.notification.fullScreenIntent.send(); 
            } catch (PendingIntent.CanceledException e) { 
            } 
        }  
 
        StatusBarIconView iconView = addNotificationViews(key, notification); 
        if (iconView == null) return; 
          //。。。以下省略N字。 
大致流程就是:调用StatusBarManagerService.java中的addNotification方法->（mBar不为空的话）执行mBar.addNotification(key, notification);->对应的是CommandQueue中的addNotification(IBinder key, StatusBarNotification notification)->CommandQueue中的mCallbacks.addNotification(ne.key, ne.notification);->StatusBarService中的addNotification。
 
3>.上面是提供相关功能的一些类，具体的notification的管理类是framework/base/services/java/com/android/server/NotificationManagerService.java，从该类的定义public class NotificationManagerService extends INotificationManager.Stub可以知道
他是用来实现接口中INotificationManager中定义的相关方法并向外部提供服务的类。主要向外提供public void enqueueNotificationWithTag(String pkg, String tag, int id, Notification notification,int[] idOut)方法。该方法实际上是调用public void enqueueNotificationInternal(String pkg, int callingUid, int callingPid,String tag, int id, Notification notification, int[] idOut)，他里面提供了notification的具体处理方法。
  摘取部分代码片段看看：
 
 
Java代码 
if (notification.icon != 0) { 
                StatusBarNotification n = new StatusBarNotification(pkg, id, tag, 
                        r.uid, r.initialPid, notification);