Change sublayer renderer

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Sample viewer app

Apply a renderer to a sublayer.

Image of change sublayer renderer

Use case

A layer showing animal populations contains sublayers for different species. A renderer could be applied which gives each sublayer a different color, so that populations of each species can be compared visually.

How to use the sample

Wait for the map image layer to load. Tap the 'Apply class break renderer' button to apply a unique value renderer to see different population ranges in the counties sub-layer data.

How it works

  1. Create an ArcGISMapImageLayer from its URL.
  2. After it is done loading, get its SublayerList with imageLayer.getSublayers().
  3. Cast the sublayer you want to change to the appropriate type: (ArcGISMapImageSublayer) sublayers.get(2).
  4. Create a ClassBreaksRenderer with a collection of ClassBreaks for different population ranges.
  5. Set the renderer of the sublayer with sublayer.setRenderer(renderer).

Relevant API

  • ArcGISMapImageLayer
  • ArcGISMapImageSubLayer
  • ClassBreaksRenderer
  • ClassBreaksRenderer.ClassBreak

About the data

This application displays census data from an ArcGIS Server map service. It contains various population statistics, including total population for each county in 2007.

Additional information

The service hosting the layer must support dynamic layers to be able to change the rendering of sublayers.

Tags

class breaks, dynamic layer, dynamic rendering, renderer, sublayer, symbology, visualization

Sample Code

MainActivity.java
                                                                                                                                     
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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.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));
  }
}

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