Add graphics with renderer

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Sample viewer app

A renderer allows you to change the style of all graphics in a graphics overlay by referencing a single symbol style. A renderer will only effect graphics that do not specify their own symbol style.

Image of adding graphics with renderer

Use case

A renderer allows you to change the style of all graphics in an overlay by only changing one copy of the symbol. For example, a user may wish to display a number of graphics on a map of parkland which represent trees, all sharing a common symbol.

How to use the sample

Run the sample and view graphics for points, lines, and polygons, which are stylized using renderers.

How it works

  • Create a GraphicsOverlay and add it to the MapView.
  • Create a Graphic, specifying only a Geometry.
  • Create a single Symbol such as a SimpleMarkerSymbol.
  • Create a renderer with the Symbol such as a SimpleRenderer(symbol).
  • Set the renderer on the GraphicsOverlay with graphicsOverlay.setRenderer(renderer).

Relevant API

  • Geometry
  • Graphic
  • GraphicsOverlay
  • SimpleFillSymbol
  • SimpleLineSymbol
  • SimpleMarkerSymbol
  • SimpleRenderer

Additional information

To set unique symbols across a number of graphics (e.g. showing graphics of individual landmarks) see the "Add graphics with symbols" sample.

Tags

display, graphics, marker, overlay, renderer, symbol

Sample Code

MainActivity.java
                                                                                                                                           
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/* Copyright 2016 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.addgraphicsrenderer;

import android.graphics.Color;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.PolygonBuilder;
import com.esri.arcgisruntime.geometry.PolylineBuilder;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
import com.esri.arcgisruntime.symbology.SimpleRenderer;

public class MainActivity extends AppCompatActivity {

  private MapView mMapView;

  @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 MapView from layout
    mMapView = findViewById(R.id.mapView);
    // create a map with the Basemap Type topographic
    ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
    // add graphics overlay
    addGraphicsOverlay();
    // set the map to be displayed in this view
    mMapView.setMap(map);
    mMapView.setViewpoint(new Viewpoint(15.169193, 16.333479, 100000000.0));
  }

  private void addGraphicsOverlay() {
    // point graphic
    Point pointGeometry = new Point(40e5, 40e5, SpatialReferences.getWebMercator());
    // red diamond point symbol
    SimpleMarkerSymbol pointSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.DIAMOND, Color.RED, 10);
    // create graphic for point
    Graphic pointGraphic = new Graphic(pointGeometry);
    // create a graphic overlay for the point
    GraphicsOverlay pointGraphicOverlay = new GraphicsOverlay();
    // create simple renderer
    SimpleRenderer pointRenderer = new SimpleRenderer(pointSymbol);
    pointGraphicOverlay.setRenderer(pointRenderer);
    // add graphic to overlay
    pointGraphicOverlay.getGraphics().add(pointGraphic);
    // add graphics overlay to the MapView
    mMapView.getGraphicsOverlays().add(pointGraphicOverlay);

    // line graphic
    PolylineBuilder lineGeometry = new PolylineBuilder(SpatialReferences.getWebMercator());
    lineGeometry.addPoint(-10e5, 40e5);
    lineGeometry.addPoint(20e5, 50e5);
    // solid blue line symbol
    SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLUE, 5);
    // create graphic for polyline
    Graphic lineGraphic = new Graphic(lineGeometry.toGeometry());
    // create graphic overlay for polyline
    GraphicsOverlay lineGraphicOverlay = new GraphicsOverlay();
    // create simple renderer
    SimpleRenderer lineRenderer = new SimpleRenderer(lineSymbol);
    // add graphic to overlay
    lineGraphicOverlay.setRenderer(lineRenderer);
    // add graphic to overlay
    lineGraphicOverlay.getGraphics().add(lineGraphic);
    // add graphics overlay to the MapView
    mMapView.getGraphicsOverlays().add(lineGraphicOverlay);

    //polygon graphic
    PolygonBuilder polygonGeometry = new PolygonBuilder(SpatialReferences.getWebMercator());
    polygonGeometry.addPoint(-20e5, 20e5);
    polygonGeometry.addPoint(20e5, 20e5);
    polygonGeometry.addPoint(20e5, -20e5);
    polygonGeometry.addPoint(-20e5, -20e5);
    // solid yellow polygon symbol
    SimpleFillSymbol polygonSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, Color.YELLOW, null);
    // create graphic for polygon
    Graphic polygonGraphic = new Graphic(polygonGeometry.toGeometry());
    // create graphic overlay for polygon
    GraphicsOverlay polygonGraphicOverlay = new GraphicsOverlay();
    // create simple renderer
    SimpleRenderer polygonRenderer = new SimpleRenderer(polygonSymbol);
    // add graphic to overlay
    polygonGraphicOverlay.setRenderer(polygonRenderer);
    // add graphic to overlay
    polygonGraphicOverlay.getGraphics().add(polygonGraphic);
    // add graphics overlay to MapView
    mMapView.getGraphicsOverlays().add(polygonGraphicOverlay);

  }

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

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

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

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