ArcGIS Runtime SDK for Java

Display KML

Display a KML layer from a URL, portal item, or local KML file.

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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.ogc.display_kml;

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.ComboBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.KmlLayer;
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.ogc.kml.KmlDataset;
import com.esri.arcgisruntime.portal.Portal;
import com.esri.arcgisruntime.portal.PortalItem;

public class DisplayKMLSample 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("Display KML Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(scene);
      stage.show();

      // create a map and add it to the map view
      ArcGISMap map = new ArcGISMap(Basemap.createDarkGrayCanvasVector());
      mapView = new MapView();
      mapView.setMap(map);

      // start zoomed in over the US
      mapView.setViewpointGeometryAsync(new Envelope(-19195297.778679, 512343.939994, -3620418.579987, 8658913.035426, 0.0, 0.0, SpatialReferences.getWebMercator()));

      // show a combo box with the different KML data source options
      ComboBox<KmlDatasourceType> kmlSourceComboBox = new ComboBox<>();
      kmlSourceComboBox.getItems().addAll(KmlDatasourceType.values());

      // show the KML layer when the data source option is shown
      kmlSourceComboBox.getSelectionModel().selectedItemProperty().addListener(o -> {
        // clear previous layer
        map.getOperationalLayers().clear();
        // create a KML layer based on the source type
        KmlDatasourceType kmlSourceType = kmlSourceComboBox.getSelectionModel().getSelectedItem();
        try {
          KmlLayer kmlLayer = null;
          switch (kmlSourceType) {
            case URL:
              KmlDataset urlKmlDataset = new KmlDataset("https://www.wpc.ncep.noaa.gov/kml/noaa_chart/WPC_Day1_SigWx.kml");
              kmlLayer = new KmlLayer(urlKmlDataset);
              break;
            case PORTAL_ITEM:
              Portal portal = new Portal("https://arcgisruntime.maps.arcgis.com");
              PortalItem portalItem = new PortalItem(portal, "9fe0b1bfdcd64c83bd77ea0452c76253");
              kmlLayer = new KmlLayer(portalItem);
              break;
            case LOCAL_FILE:
              File kmlFile = new File("./samples-data/kml/US_State_Capitals.kml");
              KmlDataset fileKmlDataset = new KmlDataset(kmlFile.getAbsolutePath());
              kmlLayer = new KmlLayer(fileKmlDataset);
              break;
          }
          // add the KML layer as an operational layer
          map.getOperationalLayers().add(kmlLayer);

          KmlLayer finalKmlLayer = kmlLayer;
          kmlLayer.addDoneLoadingListener(() -> {
            if (finalKmlLayer.getLoadStatus() != LoadStatus.LOADED) {
              new Alert(Alert.AlertType.ERROR, "Error loading KML layer").show();
            }
          });
        } catch (Exception e) {
          new Alert(Alert.AlertType.ERROR, "Error creating KML layer").show();
        }
      });

      // start with the URL data source chosen
      kmlSourceComboBox.getSelectionModel().select(0);

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

  private enum KmlDatasourceType {
    URL, PORTAL_ITEM, LOCAL_FILE
  }

  /**
   * 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);
  }

}


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