Change sublayer renderer

/*
 * 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.changesublayerrenderer;

import java.util.Arrays;

import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.layers.ArcGISMapImageLayer;
import com.esri.arcgisruntime.layers.ArcGISMapImageSublayer;
import com.esri.arcgisruntime.layers.SublayerList;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.ClassBreaksRenderer;
import com.esri.arcgisruntime.symbology.ClassBreaksRenderer.ClassBreak;
import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;

public class MainActivity extends AppCompatActivity {

  private static final String TAG = MainActivity.class.getSimpleName();

  private MapView mMapView;
  private ArcGISMapImageSublayer countiesSublayer;

  @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);

    // inflate mapView from layout
    mMapView  = findViewById(R.id.mapView);
    // create a map with a BasemapType STREETS
    ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS);
    // set the map to be displayed in this view
    mMapView.setMap(map);
    mMapView.setViewpoint(new Viewpoint(48.354406, -99.998267, 7500.0));

    // create button to apply the render
    Button renderButton = findViewById(R.id.applyRenderer);

    // create map image layer from a service URL
    final ArcGISMapImageLayer imageLayer = new ArcGISMapImageLayer(getString(R.string.census_map_server));

    // load the layer and find one of its sublayers
    imageLayer.addDoneLoadingListener(() -> {
      if(imageLayer.getLoadStatus() == LoadStatus.LOADED){
        // zoom to the image layers extent
        mMapView.setViewpointGeometryAsync(imageLayer.getFullExtent());
        // get the sublayers from the map image layer
        SublayerList sublayers = imageLayer.getSublayers();
        countiesSublayer = (ArcGISMapImageSublayer) sublayers.get(2);
      } else {
        Log.e(TAG,imageLayer.getLoadError().getMessage());
      }
    });

    // add the layer to the map
    map.getOperationalLayers().add(imageLayer);

    // create a class breaks renderer to switch to
    final ClassBreaksRenderer classBreaksRenderer = createPopulationClassBreaksRenderer();

    // set the renderer on the counties sublayer when the button is pressed
    renderButton.setOnClickListener(v -> countiesSublayer.setRenderer(classBreaksRenderer));

  }
  /**
   * Creates a class breaks renderer for 5 ranges of populations.
   *
   * @return class breaks renderer
   */
  private static ClassBreaksRenderer createPopulationClassBreaksRenderer() {

    // create colors
    final int gray  = Color.rgb(153, 153, 153);
    final int blue1 = Color.rgb(226, 234, 206);
    final int blue2 = Color.rgb(150, 193, 191);
    final int blue3 = Color.rgb(96 , 165, 181);
    final int blue4 = Color.rgb(68 , 124, 150);
    final int blue5 = Color.rgb(40 , 84 , 119);

    // create 5 fill symbols with different shades of blue and a gray outline
    SimpleLineSymbol outline = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, gray, 1);
    SimpleFillSymbol classSymbol1 = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, blue1, outline);
    SimpleFillSymbol classSymbol2 = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, blue2, outline);
    SimpleFillSymbol classSymbol3 = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, blue3, outline);
    SimpleFillSymbol classSymbol4 = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, blue4, outline);
    SimpleFillSymbol classSymbol5 = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, blue5, outline);

    // create 5 classes for different population ranges
    ClassBreak classBreak1 = new ClassBreak("-99 to 8560", "-99 to 8560", -99,
        8560, classSymbol1);
    ClassBreak classBreak2 = new ClassBreak("> 8,560 to 18,109", "> 8,560 to 18,109", 8560,
        18109, classSymbol2);
    ClassBreak classBreak3 = new ClassBreak("> 18,109 to 35,501", "> 18,109 to 35,501", 18109,
        35501, classSymbol3);
    ClassBreak classBreak4 = new ClassBreak("> 35,501 to 86,100", "> 35,501 to 86,100", 35501,
        86100, classSymbol4);
    ClassBreak classBreak5 = new ClassBreak("> 86,100 to 10,110,975", "> 86,100 to 10,110,975", 86100,
        10110975, classSymbol5);

    // create the renderer for the POP2007 field
    return new ClassBreaksRenderer("POP2007", Arrays.asList(classBreak1, classBreak2, classBreak3, classBreak4,
        classBreak5));
  }
}