Android : How can i get a message when google maps closed

Im calling google maps app from my activity with these codes and every time location change, google maps updates.

public void onLocationChanged(Location location) {

    longitude = location.getLongitude();
    latitude = location.getLatitude();
    konumum = Double.toString(latitude) + "," + Double.toString(longitude);
    musteriKonumu = musteriKonumu.replace("|", ",");
    String URL = "http://maps.google.com/maps?saddr="+ konumum + "&daddr=" + musteriKonumu;
    Uri myGeo = Uri.parse(URL);

    Intent intent = new Intent(Intent.ACTION_VIEW, myGeo);  
    startActivity(intent);
    }

I want get a message or something when the user close the google map. How can i do that?