Paho MQTT Android服务问题

https://eclipse.org/paho/clients/android/

应用程序完全关闭后,应用程序服务似乎将关闭.我希望在应用程序关闭的情况下保持服务运行,如果有更多消息进来.我也在寻找一种方法,一旦收到新消息就打开应用程序到特定活动.

这是在消息到达时调用的回调之一,我尝试实现一个简单的startActivity来打开一个特定的活动但是如果应用程序关闭/不再运行它就不起作用.

如果有人使用过PAHO MQTT Android服务,是否有一种特定的方法可以在应用程序关闭时阻止服务停止,如何在消息到达时重新打开应用程序？

/**
   * @see org.eclipse.paho.client.mqttv3.MqttCallback#messageArrived(java.lang.String,*      org.eclipse.paho.client.mqttv3.MqttMessage)
   */
  @Override
  public void messageArrived(String topic,MqttMessage message) throws Exception {

    // Get connection object associated with this object
    Connection c = Connections.getInstance(context).getConnection(clientHandle);

    // create arguments to format message arrived notifcation string
    String[] args = new String[2];
    args[0] = new String(message.getPayload());
    args[1] = topic + ";qos:" + message.getQos() + ";retained:" + message.isRetained();

    // get the string from strings.xml and format
    String messageString = context.getString(R.string.messageRecieved,(Object[]) args);

    // create intent to start activity
    Intent intent = new Intent();
    intent.setClassName(context,"org.eclipse.paho.android.service.sample.ConnectionDetails");
    intent.putExtra("handle",clientHandle);

    // format string args
    Object[] notifyArgs = new String[3];
    notifyArgs[0] = c.getId();
    notifyArgs[1] = new String(message.getPayload());
    notifyArgs[2] = topic;

    // notify the user
    Notify.notifcation(context,context.getString(R.string.notification,notifyArgs),intent,R.string.notifyTitle);

    // update client history
    c.addAction(messageString);

    Log.e("Message Arrived","MESSAGE ARRIVED CALLBACK");

    // used to open the application if it is currently not active
    Intent i = new Intent(context,ConnectionDetails.class);
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    i.putExtra("handle",clientHandle);
    context.startActivity(i);


  }