private async void LoadFuentes()
        {
            _fuentes = (await _fuenteService.ObtenerFuentes()).ToList();

            var adapter = new ArrayAdapter <Fuente>(this.Activity, Android.Resource.Layout.SimpleSpinnerItem, _fuentes.ToArray());

            _fuente.Adapter = adapter;
        }
        private async void LoadFuentes()
        {
            var array = await fuenteService.ObtenerFuentes();

            var adapter = new ArrayAdapter <Fuente>(this.Activity, Android.Resource.Layout.SimpleSpinnerItem, array.ToArray());

            _fuenteDropDown.Adapter = adapter;
        }
        private async void ActualizarFuentes()
        {
            try
            {
                _loadingSpinner.Visibility = ViewStates.Visible;

                _fuentes = await _fuenteService.ObtenerFuentes();

                _filteredList       = _fuentes.ToList();
                _fuenteSeleccionada = null;
                _listView.Adapter   = new FuenteListAdapter(this.Activity, _filteredList);

                ConfigurarAlturaListView();

                LimpiarCampos();
            }
            catch
            {
            }
            finally
            {
                _loadingSpinner.Visibility = ViewStates.Gone;
            }
        }