protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);

            //App app = new App ();
            //BranchAndroid.Init (this, GetString(Resource.String.branch_key), app);
            //LoadApplication (app);

            // uncomment to try BranchUniversalObject
            AppBUO appBUO = new AppBUO();

            BranchAndroid.Init(this, GetString(Resource.String.branch_key), appBUO);

            // enable tracking of user data
            BranchAndroid.getInstance().setTrackingDisabled(false);

            LoadApplication(appBUO);
        }