Feature layer (shapefile)

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// Copyright 2017 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.

using System;
using Android.App;
using Android.OS;
using Android.Widget;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using ArcGISRuntime.Samples.Managers;

namespace ArcGISRuntime.Samples.FeatureLayerShapefile
{
    [Activity (ConfigurationChanges=Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
	[ArcGISRuntime.Samples.Shared.Attributes.OfflineData("d98b3e5293834c5f852f13c569930caa")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Feature layer (shapefile)",
        category: "Data",
        description: "Open a shapefile stored on the device and display it as a feature layer with default symbology.",
        instructions: "Pan and zoom around the map to observe the data from the shapefile.",
        tags: new[] { "layers", "shapefile", "shp", "vector" })]
    public class FeatureLayerShapefile : Activity
    {
        private MapView _myMapView;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            Title = "Feature layer (shapefile)";
            CreateLayout();

            // Download (if necessary) and add a local shapefile dataset to the map
            Initialize();
        }

        private async void Initialize()
        {
            // Create a new map to display in the map view with a streets basemap
            _myMapView.Map = new Map(BasemapStyle.ArcGISStreets);

            // Get the path to the downloaded shapefile
            string filepath = GetShapefilePath();

            try
            {
                // Open the shapefile
                ShapefileFeatureTable myShapefile = await ShapefileFeatureTable.OpenAsync(filepath);

                // Create a feature layer to display the shapefile
                FeatureLayer newFeatureLayer = new FeatureLayer(myShapefile);

                // Add the feature layer to the map
                _myMapView.Map.OperationalLayers.Add(newFeatureLayer);

                // Zoom the map to the extent of the shapefile
                await _myMapView.SetViewpointGeometryAsync(newFeatureLayer.FullExtent, 50);
            }
            catch (Exception e)
            {
                new AlertDialog.Builder(this).SetMessage(e.ToString()).SetTitle("Error").Show();
            }
        }

        private static string GetShapefilePath()
        {
            return DataManager.GetDataFolder("d98b3e5293834c5f852f13c569930caa", "Public_Art.shp");
        }

        private void CreateLayout()
        {
            // Create a new vertical layout for the app
            LinearLayout layout = new LinearLayout(this) { Orientation = Orientation.Vertical };

            // Add a map view to the layout
            _myMapView = new MapView(this);
            layout.AddView(_myMapView);

            // Show the layout in the app
            SetContentView(layout);
        }
    }
}