发送通知时，请使用以下命令:

When sending notification use following :

NotificationManager mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder mBuilder =
                new NotificationCompat.Builder(mContext)
                .....;


Intent activityIntent = new Intent(mContext, ShowNotificationActivity.class);
            activityIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

PendingIntent contentIntent = PendingIntent.getActivity(mContext, 0, activityIntent, PendingIntent.FLAG_ONE_SHOT);
        mBuilder.setContentIntent(contentIntent);

        mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());