i used the following URL https://github.com/jgilfelt/android-mapviewballoons source in my application is show image by using url how do i give images form my own drawable folder?? i found this mapview url which show images inbaloon but is show images by url i wanna show myown iamges how i do? howi give my own images from my folder

      public class CustomMap extends MapActivity {

MapView mapView;
List<Overlay> mapOverlays;
Drawable drawable;
Drawable drawable2;
CustomItemizedOverlay<CustomOverlayItem> itemizedOverlay;
CustomItemizedOverlay<CustomOverlayItem> itemizedOverlay2;

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

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

    mapOverlays = mapView.getOverlays();

    // first overlay
    drawable = getResources().getDrawable(R.drawable.marker);
    itemizedOverlay = new CustomItemizedOverlay<CustomOverlayItem>(drawable,  
   mapView);

    GeoPoint point = new GeoPoint((int)(51.5174723*1E6),(int)(-0.0899537*1E6));
    CustomOverlayItem overlayItem = new CustomOverlayItem(point,  
   "Tomorrow      Never Dies (1997)", 
            "(M gives Bond his mission in Daimler car)", 
            "http://ia.media-imdb.com/images 
  /M/MV5BMTM1MTk2ODQxNV5BMl5BanBnXkFtZTcwOTY5MDg0NA@@._V1._SX40_CR0,0,40,54_.jpg");
    itemizedOverlay.addOverlay(overlayItem);

    GeoPoint point2 = new GeoPoint((int)(51.515259*1E6),(int)(-0.086623*1E6));
    CustomOverlayItem overlayItem2 = new CustomOverlayItem(point2, 
   "GoldenEye   (1995)", 
            "(Interiors Russian defence ministry council chambers in 
  St Petersburg)", 
            "http://ia.media-imdb.com/images   

  M/MV5BMzk2OTg
  4MTk1NF5BMl5BanBnXkFtZTcwNjExNTgzNA@@._V1._SX40_CR0,0,40,54_.jpg");


    itemizedOverlay.addOverlay(overlayItem2);

    mapOverlays.add(itemizedOverlay);

    // second overlay
    drawable2 = getResources().getDrawable(R.drawable.marker2);
    itemizedOverlay2 = new CustomItemizedOverlay<CustomOverlayItem>
    (drawable2,   mapView);

    GeoPoint point3 = new GeoPoint((int)(51.513329*1E6),(int)(-0.08896*1E6));
    CustomOverlayItem overlayItem3 = new CustomOverlayItem(point3, "Sliding 
  Doors (1998)", 
            "(interiors)", null);
    itemizedOverlay2.addOverlay(overlayItem3);

    GeoPoint point4 = new GeoPoint((int)(51.51738*1E6),(int)(-0.08186*1E6));
    CustomOverlayItem overlayItem4 = new CustomOverlayItem(point4, "Mission: 
  Impossible (1996)", 
            "(Ethan & Jim cafe meeting)", 
            "http://ia.media-imdb.com/images 
    /M/MV5BMjAyNjk5Njk0MV
      5BMl5BanBnXkFtZTcwOTA4MjIyMQ@@._V1._SX40_CR0,0,40,54_.jpg");      
    itemizedOverlay2.addOverlay(overlayItem4);

    mapOverlays.add(itemizedOverlay2);

    final MapController mc = mapView.getController();
    mc.animateTo(point2);
    mc.setZoom(16);

}

@Override
protected boolean isRouteDisplayed() {
    return false;
}

   }