Question

My code currently displays the users location on a map… using the code below

private void initMyLocation() {
    final MyLocationOverlay overlay = new MyLocationOverlay(this, map);
    overlay.enableMyLocation();

    overlay.runOnFirstFix(new Runnable() {
        public void run() {
            controller.setZoom(8);
            controller.animateTo(overlay.getMyLocation());
        }
    });
    map.getOverlays().add(overlay);
}

I want to use the current location of the user and perform geocding on it to display the address as a toast message.. Would i have to delete the code above and retrieve the location by separate longitude and latitude values? Preferably i wouldnt want to go changing the code above as it already works.. I can’t seem to find any good tutorials out there.. Could someone please direct me to one?
Thanks

Answer 1

1. Since MyLocationOverlay already implements LocationListener, you could simply subclass it and override the onLocationChanged listener method and perform your geocoding there (preferably in a new thread/async task to avoid blocking the overlay processing!).

   Something like:

   private void initMyLocation() {
       final MyLocationOverlay overlay = new MyLocationOverlay(this, map){
           public void onLocationChanged(android.location.Location location)
           {
               //subclass AsyncTask to take a location parameter for 
               //doInBackground where it geocodes and then passes a String
               //to onPostExecute where you can display a toast
               new MyAsyncTask().execute(location);
   
               //remember to call the parent implementation to avoid breaking
               //MyLocationOverlay default functionality
               super.onLocationChanged(location);
           }
       };
       overlay.enableMyLocation();
   
       overlay.runOnFirstFix(new Runnable() {
           public void run() {
               controller.setZoom(8);
               controller.animateTo(overlay.getMyLocation());
           }
       });
       map.getOverlays().add(overlay);
   }
   

2. The other option might be to write a custom LocationListener and register for updates for location and do pretty much the same thing as in the code above. IMO, this is probably redundant and unnecessarily expensive since, as explained above, you already have a LocationListener implementation to hook into so why write another?