protected void onPostExecute(Boolean result) {
   if (ruta != null) {
     activity.mapa.clear();
     activity.mapa.addMarker(new MarkerOptions().position(activity.markerPosicion.getPosition()));
     polylineSelected = MapaService.getPolylines(ruta.getListLocation());
     activity.mapa.addPolyline(polylineSelected);
     MapaService.addMarkeresPositionRoutes(activity.mapa, ruta);
   }
   activity.dismissProgress();
 }
 @Override
 protected void onPreExecute() {
   // mostramos el progress Dialog
   activity.showProgressDialog();
 }