How to run code in the background continuously - Android

Question

I am having a little bit of a difficulty in managing background services in android. I have this piece of code with me:

private boolean isNetworkConnected() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    return cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
}

I want to run this code in the background and I don't know what I can do. Some people tell me to use Services, but I want this code to be running only in the app, not when the app is closed as well.

I also need the above code, while in the background, to alert the user in the form of a toast when the internet is not there and when it is there.

Can someone please help me? Thanks in advance!

Answer 1

Something like this should do the trick.

public class MyService extends Service
{
    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        //Do something here...

        //Check for the connections.
        if(!isNetworkConnected) {
            Toast.makeText(this, "No Internet Connection!", Toast.LENGTH_SHORT).show();
         } else {
             //Do something else...
         }

       //To stop this service. Call it here probably not a right choice. Just as reminder.
        //stopSelfResult(startId);

        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    private boolean isNetworkConnected() {
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
    }
}