android - 蓝牙连接丢失并弹出设备

Question

当我失去与设备的连接时，在创建此弹出窗口时遇到问题。有人可以帮忙吗。以下是我到目前为止所拥有的。

public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();

    if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
        NotificationManager nm = (NotificationManager) 
                getSystemService(NOTIFICATION_SERVICE);
    }   
    int icon = R.drawable.ic_launcher;
    CharSequence tickerText = "This is a warning that you have left your Thumbdrive behind";
    long when = System.currentTimeMillis();
    CharSequence contentTitle = "WARNING";
    CharSequence contentText = "This notification has been generated as a result of BT Disconnecting";
    Intent notificationIntent = new Intent(this, MainActivity.class);
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

    /** Initialize the Notification using the above configuration */
    final Notification notification = new Notification(icon, tickerText, when);
    notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);

    /** Retrieve reference from NotificationManager */

    String ns = Context.NOTIFICATION_SERVICE;
    final NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

    mNotificationManager.notify(NOTIFICATION_ID, notification);

    finish();
}