How to run android service permanently like system service?

Question

I want to run my Android service(real-time notification service) after application installed and force it to work even application closed. This service responsible for listening my real-time notification server, when notification received I create Android notification and maybe run my app, if it is closed. I assume that my way is not correct for this case and there is another way working with real-time notification. I will be grateful if you give some link or a small explanation.

Answer 1

the better approach to listening my real-time notification server, you've to use GCM. here you can start reading about GCM. and if you want to implement it yourself you have to write a service yourself. ex:

    public class ListenerService extends Service{
     @Override
     public void onStartCommand(Intent intent, int flags, int startId){


       return START_STICKY; //this will restart your service even though the system kills
      }

   // you can write other listener service method inside the service
    }

but still I recommend you to use GCM or other cloud messaging services instead of writing your own.