Open street Map is Not Display in OSM map view
<p>I have try to create application of open street map . but map is not display only grid is display. i have use a these code in my application.</p>

<p>public class MainActivity extends Activity{</p>

<pre><code>private MapView mapView;
private MapController mapController;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mapView = (MapView) this.findViewById(R.id.mapview);
    mapView.setTileSource(TileSourceFactory.MAPNIK);
    mapView.setBuiltInZoomControls(true);
    mapView.setMultiTouchControls(true);
    mapController = this.mapView.getController();
    mapController.setZoom(2);

    GeoPoint gPt = new GeoPoint(51500000, -150000);
    //Centre map near to Hyde Park Corner, London
    mapController.setCenter(gPt);
}
</code></pre>

<p>}</p>

<p>thanx in advance.
please.. any body tell me what is wrong in my code..</p>
