Add a point scene layer

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// Copyright 2019 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 Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using System;

namespace ArcGISRuntimeXamarin.Samples.AddPointSceneLayer
{
    [Activity (ConfigurationChanges=Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Add a point scene layer",
        category: "Layers",
        description: "View a point scene layer from a scene service.",
        instructions: "Pan around the scene and zoom in. Notice how many thousands of additional features appear at each successive zoom scale.",
        tags: new[] { "3D", "layers", "point scene layer" })]
    public class AddPointSceneLayer : Activity
    {
        // Hold references to the UI controls.
        private SceneView _mySceneView;

        // URL for the service with the point scene layer.
        private const string PointSceneServiceUri = "https://tiles.arcgis.com/tiles/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Airports_PointSceneLayer/SceneServer/layers/0";

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

            Title = "Add a point scene layer";

            CreateLayout();
            Initialize();
        }

        private void Initialize()
        {
            // Create the scene.
            _mySceneView.Scene = new Scene(BasemapStyle.ArcGISImageryStandard);

            // Create the layer.
            ArcGISSceneLayer pointSceneLayer = new ArcGISSceneLayer(new Uri(PointSceneServiceUri));

            // Show the layer in the scene.
            _mySceneView.Scene.OperationalLayers.Add(pointSceneLayer);
        }

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

            // Add the map view to the layout.
            _mySceneView = new SceneView(this);
            layout.AddView(_mySceneView);

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

        protected override void OnDestroy()
        {
            base.OnDestroy();

            // Remove the sceneview
            (_mySceneView.Parent as ViewGroup).RemoveView(_mySceneView);
            _mySceneView.Dispose();
            _mySceneView = null;
        }
    }
}