Symbolize Shapefile

Demonstrates how to override symbols of the default renderer for a shapefile.

How it works

To change the renderer of a shapefile feature layer:

  1. Create a ShapefileFeatureTable passing in the URL of a shapefile.
  2. Create a FeatureLayer using the ShapefileFeatureTable.
  3. Create a SimpleLineSymbol and SimpleFillSymbol (uses the line symbol).
  4. Make a SimpleRenderer with the SimpleFillSymbol.
  5. To apply the renderer, use featureLayer.setRenderer(renderer).
  6. To go back to the default renderer, use featureLayer.resetRenderer().

Code

/*
 * 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.samples.symbology.symbolize_shapefile;

import java.io.File;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import com.esri.arcgisruntime.data.ShapefileFeatureTable;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleRenderer;

public class SymbolizeShapefileSample extends Application {

  private MapView mapView;

  @Override
  public void start(Stage stage) {

    try {
      // create stack pane and application scene
      StackPane stackPane = new StackPane();
      Scene scene = new Scene(stackPane);

      // set title, size, and add scene to stage
      stage.setTitle("Symbolize Shapefile Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // create a map with a basemap
      ArcGISMap map = new ArcGISMap(Basemap.createTopographic());

      // set the map to the map view
      mapView = new MapView();
      mapView.setMap(map);

      // create a shapefile feature table from the local data
      File shapefile = new File("./samples-data/auroraCO/Subdivisions.shp");
      ShapefileFeatureTable shapefileFeatureTable = new ShapefileFeatureTable(shapefile.getAbsolutePath());

      // use the shapefile feature table to create a feature layer
      FeatureLayer featureLayer = new FeatureLayer(shapefileFeatureTable);
      featureLayer.addDoneLoadingListener(() -> {
        if (featureLayer.getLoadStatus() == LoadStatus.LOADED) {
          // zoom to the feature layer's extent
          mapView.setViewpointGeometryAsync(featureLayer.getFullExtent());
        } else {
          Alert alert = new Alert(Alert.AlertType.ERROR, featureLayer.getLoadError().getMessage());
          alert.show();
        }
      });

      // add the feature layer to the map
      map.getOperationalLayers().add(featureLayer);

      // create the symbols and renderer
      SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFFFF0000, 1.0f);
      SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, 0xFFFFFF00, lineSymbol);
      SimpleRenderer renderer = new SimpleRenderer(fillSymbol);

      // create a toggle button to switch between renderers
      ToggleButton symbolizeButton = new ToggleButton("Toggle Symbology");
      symbolizeButton.setOnAction(e -> {
        if (symbolizeButton.isSelected()) {
          featureLayer.setRenderer(renderer);
        } else {
          // switch back to the default renderer
          featureLayer.resetRenderer();
        }
      });

      // add the map view and toggle button to the stack pane
      stackPane.getChildren().addAll(mapView, symbolizeButton);
      StackPane.setAlignment(symbolizeButton, Pos.TOP_LEFT);
      StackPane.setMargin(symbolizeButton, new Insets(10, 0, 0, 10));
    } catch (Exception e) {
      // on any error, display the stack trace.
      e.printStackTrace();
    }
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {

    if (mapView != null) {
      mapView.dispose();
    }
  }

  /**
   * Opens and runs application.
   *
   * @param args arguments passed to this application
   */
  public static void main(String[] args) {

    Application.launch(args);
  }

}


In this topic
  1. How it works
  2. Code