Terrain exaggeration

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/* Copyright 2018 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.terrainexaggeration;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;

import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.ArcGISTiledElevationSource;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Surface;
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);

    // get a reference to the scene view
    mSceneView = findViewById(R.id.sceneView);
    // create a scene and add it to the scene view
    ArcGISScene scene = new ArcGISScene(Basemap.Type.NATIONAL_GEOGRAPHIC);
    mSceneView.setScene(scene);

    // add base surface for elevation data
    final Surface surface = new Surface();
    ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(getString(R.string.elevation_image_service_url));
    surface.getElevationSources().add(elevationSource);
    scene.setBaseSurface(surface);

    // add a camera and initial camera position
    Point initialLocation = new Point(-119.94891542688772, 46.75792111605992, 3183, mSceneView.getSpatialReference());
    Camera camera = new Camera(initialLocation, 0, 7, 70, 0);
    mSceneView.setViewpointCamera(camera);

    // create TextView to show SeekBar value
    final TextView exaggerationTextView = findViewById(R.id.exaggerationValueTextView);
    // create SeekBar
    final SeekBar exaggerationSeekBar = findViewById(R.id.exaggerationSeekBar);
    exaggerationSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
      @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean b) {
        // disallow any progress value below 1
        progress = Math.max(1, progress);
        // set the text to SeekBar value
        exaggerationTextView.setText(String.valueOf(progress));
        // set exaggeration of surface to the value the user selected
        surface.setElevationExaggeration(progress);
      }

      @Override public void onStartTrackingTouch(SeekBar seekBar) {

      }

      @Override public void onStopTrackingTouch(SeekBar seekBar) {
        // disallow any progress value below 1
        seekBar.setProgress(Math.max(1, seekBar.getProgress()));
      }
    });
  }

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

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

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