@Override public void onStart() { super.onStart(); Log.d("haipn", "onstart marketplace"); RequestQueue queue = MyVolley.getRequestQueue(); GsonRequest<MpListCategories> myReq = new GsonRequest<MpListCategories>( Method.GET, Const.URL_LIST_CATEGORY, MpListCategories.class, createMyReqSuccessListener(), createMyReqErrorListener()); queue.add(myReq); Tracker tracker = GoogleAnalytics.getInstance(getActivity()).getTracker(Const.GA_PROPERTY_ID); tracker.set(Fields.SCREEN_NAME, SCREEN_LABEL); tracker.send(MapBuilder.createAppView().build()); }