发送系统通知

NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification.Builder(this)
        .setContentText("haha")
        .setContentTitle("xaioer")
        .setSmallIcon(R.drawable.ic_launcher)
        .build();
        

        manager.notify(1, notification);
    }