public void OnClick(View view)
        {
            string     queryText   = queryInput.Text;
            string     language    = languageInput.Text;
            string     countryCode = countryCodeInput.Text;
            double     lat         = double.Parse(latitudeInput.Text, CultureInfo.InvariantCulture);
            double     lon         = double.Parse(longitudeInput.Text, CultureInfo.InvariantCulture);
            Coordinate location    = new Coordinate(lat, lon);

            Java.Lang.Integer radius    = Java.Lang.Integer.ValueOf(radiusInput.Text);
            Java.Lang.Integer pageIndex = Java.Lang.Integer.ValueOf(pageIndexInput.Text);
            Java.Lang.Integer pageSize  = Java.Lang.Integer.ValueOf(pageSizeInput.Text);

            switch (view.Id)
            {
            case Resource.Id.btn_search_place:
                TextSearchRequest textSearchRequest = new TextSearchRequest();
                textSearchRequest.Query       = queryText;
                textSearchRequest.Language    = language;
                textSearchRequest.CountryCode = countryCode;
                textSearchRequest.Location    = location;
                textSearchRequest.Radius      = radius;
                textSearchRequest.PageIndex   = pageIndex;
                textSearchRequest.PageSize    = pageSize;

                TextSearchResultListener textSearchResultListener = new TextSearchResultListener();
                searchService.TextSearch(textSearchRequest, textSearchResultListener);

                break;

            case Resource.Id.btn_search_nearby_place:
                NearbySearchRequest nearbySearchRequest = new NearbySearchRequest();
                nearbySearchRequest.Query     = queryText;
                nearbySearchRequest.Language  = language;
                nearbySearchRequest.Location  = location;
                nearbySearchRequest.Radius    = radius;
                nearbySearchRequest.PageIndex = pageIndex;
                nearbySearchRequest.PageSize  = pageSize;

                NearbySearchResultListener nearbySearchResultListener = new NearbySearchResultListener();
                searchService.NearbySearch(nearbySearchRequest, nearbySearchResultListener);

                break;

            default:
                break;
            }
        }
        private void ExecPlaceSearch()
        {
            NearbySearchRequest NearbySearchRequest = new NearbySearchRequest();

            string queryText = QueryInput.Text;

            if (queryText.Length == 0)
            {
                ResultTextView.Text = "Error : Query is empty!";
                return;
            }
            NearbySearchRequest.Query = queryText;

            string language = LanguageInput.Text;

            if (!string.IsNullOrEmpty(LanguageInput.Text))
            {
                NearbySearchRequest.Language = language;
            }

            double lat;
            double lon;

            if (!string.IsNullOrEmpty(LatitudeInput.Text) || !string.IsNullOrEmpty(LongitudeInput.Text))
            {
                if (!(double.TryParse(LatitudeInput.Text, out lat)) || !(double.TryParse(LongitudeInput.Text, out lon)))
                {
                    ResultTextView.Text = "Error : Location is invalid!";
                    return;
                }
                NearbySearchRequest.Location = new Coordinate(lat, lon);
            }

            int radiusInt;

            if (!(Int32.TryParse(RadiusInput.Text, out radiusInt)) || radiusInt <= 0)
            {
                ResultTextView.Text = "Error : Radius Must be greater than 0 !";
                return;
            }
            NearbySearchRequest.Radius = (Integer)radiusInt;


            string pageIndex = PageIndexInput.Text;
            int    pageIndexInt;

            if (!(Int32.TryParse(pageIndex, out pageIndexInt)) || pageIndexInt < 1 || pageIndexInt > 60)
            {
                ResultTextView.Text = "Error : PageIndex Must be between 1 and 60!";
                return;
            }
            NearbySearchRequest.PageIndex = (Integer)pageIndexInt;

            string pageSize = PageSizeInput.Text;
            int    pageSizeInt;

            if (!(Int32.TryParse(pageSize, out pageSizeInt)) || pageSizeInt < 1 || pageSizeInt > 20)
            {
                ResultTextView.Text = "Error : PageSize Must be between 1 and 20!";
                return;
            }
            NearbySearchRequest.PageSize = (Integer)pageSizeInt;

            LocationType poiType = PoiTypeSpinner.Enabled ? (LocationType)PoiTypeSpinner.SelectedItem : null;

            if (poiType != null)
            {
                NearbySearchRequest.PoiType = poiType;
            }

            NearbySearchRequest.StrictBounds = (Java.Lang.Boolean)BoundStrict.Checked;

            NearbySearchResultListener nearbySearchResultListener = new NearbySearchResultListener();

            // Call the search API.
            SearchService.NearbySearch(NearbySearchRequest, nearbySearchResultListener);
        }