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<Overlay> 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);
              }                     
          }
        }       
    }

Answer 2

The itemized overlay needs the 2nd 2 paramters because it uses them for click events. When you click one of the itemized overlays, it has a title and a description associated with it, which are the 2nd and 3rd parameters in your overlay item

Answer 3

I recently came across this problem. The issue is outlined in this bug report.

To fix it you should call populate() in your ItemizedOverlay before any data is populated. I added it to the constructor:

private class MyItemizedOverlay extends ItemizedOverlay<OverlayItem> {

    private Context context;
    private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();

    LocationItemizedOverlay(Drawable defaultMarker, Context context) {
        super(boundCenterBottom(defaultMarker));
        this.context = context;
        populate(); // Add this
    }
}