In my app i am using osm rather than google map.I have latitude and longitude.So from here how i will query to get the city name from osm database..please help me.

final String requestString =
         "http://nominatim.openstreetmap.org/reverse?format=json&lat=" +
         Double.toString(lat) + "&lon=" + Double.toString(lon) +
         "&zoom=18&addressdetails=1";

         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
         URL.encode(requestString));
         try {
         @SuppressWarnings("unused")
         Request request = builder.sendRequest(null, new RequestCallback()
         {
         @Override
         public void onResponseReceived(Request request, Response
         response) {
         if (response.getStatusCode() == 200) {
         String city = "";
         try {
         JSONValue json = JSONParser.parseStrict(response);
         JSONObject address = json.isObject().get("address").isObject();
         final String quotes = "^\"|\"$";

         if (address.get("city") != null) {
         city = address.get("city").toString().replaceAll(quotes, "");
         } else if (address.get("village") != null) {
         city = address.get("village").toString().replaceAll(quotes, "");
         }
         } catch (Exception e) {
         }
         }
         }
         });
         } catch (Exception e1) {
         }