Problem with crash with ItemizedOverlay

Question

I have been trying for hours to figure out why I can not use an Itemized Map overlay without doing this before adding it to the ovelays of the map:

GeoPoint po

Answer 1

if you make important changes on your ItemizedOverlay you have every time to do

1. delete_usrer_Marker_from_Overlays(myitemizedoverlay);
2. create_user_Marker(myitemizedoverlay);
3. mapView.getOverlays().add(myitemizedoverlay);

with

private void delete_usrer_Marker_from_Overlays(MyOverlays myio){

    List mapOverlays = mapView.getOverlays();
    if (mapOverlays != null) 
        {
          for (int i = 0;i< mapOverlays.size();i++)
          {
              Overlay x = mapOverlays.get(i);
              if (x.hashCode() == myio.hashCode())
              {
                  mapOverlays.remove(x);
              }                     
          }
        }       
    }