收到通知/清除通知位置

framework/base/core/java/android/service/notification/NotificationListenerService.java
   private final class MyHandler extends Handler {
        public static final int MSG_ON_NOTIFICATION_POSTED = 1;
        public static final int MSG_ON_NOTIFICATION_REMOVED = 2;
        public static final int MSG_ON_LISTENER_CONNECTED = 3;
        public static final int MSG_ON_NOTIFICATION_RANKING_UPDATE = 4;
        public static final int MSG_ON_LISTENER_HINTS_CHANGED = 5;
        public static final int MSG_ON_INTERRUPTION_FILTER_CHANGED = 6;
        public static final int MSG_ON_NOTIFICATION_CHANNEL_MODIFIED = 7;
        public static final int MSG_ON_NOTIFICATION_CHANNEL_GROUP_MODIFIED = 8;
        public static final int MSG_ON_STATUS_BAR_ICON_BEHAVIOR_CHANGED = 9;

        public MyHandler(Looper looper) {
            super(looper, null, false);
        }

        @Override
        public void handleMessage(Message msg) {
            if (!isConnected) {
                return;
            }
            switch (msg.what) {
                case MSG_ON_NOTIFICATION_POSTED: {
                    SomeArgs args = (SomeArgs) msg.obj;
                    StatusBarNotification sbn = (StatusBarNotification) args.arg1;
                    RankingMap rankingMap = (RankingMap) args.arg2;
                    args.recycle();
                    onNotificationPosted(sbn, rankingMap);
                    //add------------------------------
                    String j = sbn.getPackageName();
                    if(j.equals("com.google.android.dialer") || j.equals("com.google.android.apps.messaging")){
                        Intent intent = new Intent();
                        intent.setAction("com.faiot.Scanner.SET_LED");
                        getContext().sendBroadcast(intent);
                    }
                    //end------------------------------
                } break;

                case MSG_ON_NOTIFICATION_REMOVED: {
                    SomeArgs args = (SomeArgs) msg.obj;
                    StatusBarNotification sbn = (StatusBarNotification) args.arg1;
                    RankingMap rankingMap = (RankingMap) args.arg2;
                    int reason = (int) args.arg3;
                    NotificationStats stats = (NotificationStats) args.arg4;
                    args.recycle();
                    onNotificationRemoved(sbn, rankingMap, stats, reason);
                     //add------------------------------
                    int m = 0;
                    StatusBarNotification[] activeNotifications = getActiveNotifications();
                    for(StatusBarNotification i : activeNotifications){
                        String j = i.getPackageName();
                        if(j.equals("com.google.android.dialer") || j.equals("com.google.android.apps.messaging"))
                            m++;
                    }
                    if(m == 0){
                        Intent intent = new Intent();
                        intent.setAction("com.faiot.Scanner.CLEAR_LED");
                        getContext().sendBroadcast(intent);
                    }
                   //aend------------------------------
                } break;

                case MSG_ON_LISTENER_CONNECTED: {
                    onListenerConnected();
                } break;

                case MSG_ON_NOTIFICATION_RANKING_UPDATE: {
                    RankingMap rankingMap = (RankingMap) msg.obj;
                    onNotificationRankingUpdate(rankingMap);
                } break;