Pinning / marking current location in android map

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Mobile

Android

Google-Maps

I am on the way of developing a Google map related service in android. I want to point out my current location in the map and have to mark the location in it. It will be alright when I am passing altitude and longitude maually into the map. But, when retrieving the lat & long with geocoder, i can't point it in the map, doing it forcefully results in the crushing of the app. Can anybody suggest a solution?

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mapView = (MapView) findViewById(R.id.mapView);
mapView.setTraffic(true);
mapView.setBuiltInZoomControls(true);

GeoPoint point = new GeoPoint(
(int) (location.getLatitude() * 1E6),
(int) (location.getLongitude() * 1E6));

Toast.makeText(getBaseContext(),
"Latitude: " + location.getLatitude() +
" Longitude: " + location.getLongitude(),
Toast.LENGTH_SHORT).show();

List<overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.icon);


HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable,this);
OverlayItem overlayitem = new OverlayItem(point,"","" );
itemizedoverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedoverlay);

}

@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}

@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub

}

@Override
public void onProviderDisabled(String provider) {

Toast.makeText(getBaseContext(),"GPS Disabled",Toast.LENGTH_SHORT).show();

}

@Override
public void onProviderEnabled(String provider) {

Toast.makeText(getBaseContext(),"GPS Enabled",Toast.LENGTH_SHORT).show();

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub

}

This is my code