Viewshed camera

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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.
 *
 */

package com.esri.arcgisruntime.sample.viewshedcamera;

import android.os.Bundle;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;

import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geoanalysis.LocationViewshed;
import com.esri.arcgisruntime.layers.IntegratedMeshLayer;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.ArcGISTiledElevationSource;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Surface;
import com.esri.arcgisruntime.mapping.view.AnalysisOverlay;
import com.esri.arcgisruntime.mapping.view.Camera;
import com.esri.arcgisruntime.mapping.view.SceneView;

public class MainActivity extends AppCompatActivity {

  private SceneView mSceneView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // authentication with an API key or named user is required to access basemaps and other
    // location services
    ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY);

    // create a scene and add a basemap to it
    ArcGISScene scene = new ArcGISScene(BasemapStyle.ARCGIS_IMAGERY);

    // add the scene to a scene view
    mSceneView = findViewById(R.id.sceneView);
    mSceneView.setScene(scene);

    // set the camera to the scene view
    Camera camera = new Camera(41.985, 2.82691, 124.987, 332.131, 82.4732, 0.0);
    mSceneView.setViewpointCamera(camera);

    // add base surface for elevation data to the scene view
    Surface surface = new Surface();
    ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(
        "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer");
    surface.getElevationSources().add(elevationSource);
    scene.setBaseSurface(surface);

    // add an integrated mesh layer to the scene
    IntegratedMeshLayer gironaMeshLayer = new IntegratedMeshLayer(
        "https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/Girona_Spain/SceneServer");
    scene.getOperationalLayers().add(gironaMeshLayer);

    // create a viewshed from the camera
    LocationViewshed viewshed = new LocationViewshed(camera, 1.0, 500.0);

    // create an analysis overlay to add the viewshed to the scene view
    AnalysisOverlay analysisOverlay = new AnalysisOverlay();
    analysisOverlay.getAnalyses().add(viewshed);
    mSceneView.getAnalysisOverlays().add(analysisOverlay);

    // create a button to update the viewshed with the current camera
    Button cameraButton = findViewById(R.id.updateViewshedButton);
    cameraButton.setOnClickListener(
        view -> viewshed.updateFromCamera(mSceneView.getCurrentViewpointCamera()));
  }

  @Override
  protected void onPause() {
    mSceneView.pause();
    super.onPause();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mSceneView.resume();
  }

  @Override
  protected void onDestroy() {
    mSceneView.dispose();
    super.onDestroy();
  }
}