final int ID_LED=19871103;         NotificationManager nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);         Notification notification = new Notification();         notification.ledARGB = 0xFFFFFF;  //这里是颜色，我们可以尝试改变，理论上0xFF0000是红色，0x00FF00是绿色         notification.ledOnMS = 100;         notification.ledOffMS = 100;         notification.flags = Notification.FLAG_SHOW_LIGHTS;         nm.notify(ID_LED, notification);         nm.cancel(ID_LED);