Android : unable to display map

Trying to display simple map in my emulator/real device.

I have also get the key from google, put the google service library in my workspace etc..

here is the code:

    public class MainActivity extends MapActivity {
    private MapView mapView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mapView = (MapView) findViewById(R.id.map_view);      
    mapView.setBuiltInZoomControls(true);
    }
    @Override
    protected boolean isRouteDisplayed() {
    return false;
    }
    }

The above output I am getting..I dont know what I am missing..Any help is appriciate

Thanks.