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/*
* Copyright 2019 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.findclosestfacilitytoanincidentinteractive;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ExecutionException;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.geometry.SpatialReferences;
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.DefaultMapViewOnTouchListener;
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.PictureMarkerSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleMarkerSymbol;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityParameters;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityResult;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityRoute;
import com.esri.arcgisruntime.tasks.networkanalysis.ClosestFacilityTask;
import com.esri.arcgisruntime.tasks.networkanalysis.Facility;
import com.esri.arcgisruntime.tasks.networkanalysis.Incident;
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private final SpatialReference mWebMercator = SpatialReferences.getWebMercator();
private MapView mMapView;
private GraphicsOverlay mFacilityGraphicsOverlay;
private GraphicsOverlay mIncidentGraphicsOverlay;
private SimpleLineSymbol mRouteSymbol;
private List<Facility> mFacilities;
private ClosestFacilityTask mClosestFacilityTask;
private ClosestFacilityParameters mClosestFacilityParameters;
private Point mIncidentPoint;
@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);
// get a reference to the map view
mMapView = findViewById(R.id.mapView);
// create a map with a streets basemap
ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS);
// add the map to the map view
mMapView.setMap(map);
// set the view point to center on San Diego
mMapView.setViewpoint(new Viewpoint( 32.727, -117.1750, 100000));
mFacilityGraphicsOverlay = new GraphicsOverlay();
mIncidentGraphicsOverlay = new GraphicsOverlay();
createFacilitiesAndGraphics();
// add graphics overlays to the map view
mMapView.getGraphicsOverlays().add(mFacilityGraphicsOverlay);
mMapView.getGraphicsOverlays().add(mIncidentGraphicsOverlay);
// task to find the closest route between an incident and a facility
mClosestFacilityTask = new ClosestFacilityTask(this, getString(R.string.san_diego_network_service_url));
mClosestFacilityTask.addDoneLoadingListener(() -> {
if (mClosestFacilityTask.getLoadStatus() == LoadStatus.LOADED) {
ListenableFuture<ClosestFacilityParameters> closestFacilityParametersFuture = mClosestFacilityTask
.createDefaultParametersAsync();
closestFacilityParametersFuture.addDoneListener(() -> {
try {
mClosestFacilityParameters = closestFacilityParametersFuture.get();
// set new parameters to find route
mClosestFacilityParameters.setFacilities(mFacilities);
} catch (ExecutionException | InterruptedException e) {
String error = "Error generating parameters: " + e.getMessage();
Log.e(TAG, error);
Toast.makeText(this, error, Toast.LENGTH_LONG).show();
}
});
} else {
String error = "Closest facility task failed to load: " + mClosestFacilityTask.getLoadError().getMessage();
Log.e(TAG, error);
Toast.makeText(this, error, Toast.LENGTH_LONG).show();
}
});
mClosestFacilityTask.loadAsync();
// symbols that display incident (black cross) and route (blue line) to view
SimpleMarkerSymbol incidentSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CROSS, Color.BLACK, 20);
mRouteSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLUE, 2.0f);
// place incident were user clicks and display route to closest facility
mMapView.setOnTouchListener(new DefaultMapViewOnTouchListener(this, mMapView) {
@Override public boolean onSingleTapConfirmed(MotionEvent e) {
// remove last incident
mIncidentGraphicsOverlay.getGraphics().clear();
// show incident to the map view
Point mapPoint = mMapView
.screenToLocation(new android.graphics.Point(Math.round(e.getX()), Math.round(e.getY())));
mIncidentPoint = new Point(mapPoint.getX(), mapPoint.getY(), mWebMercator);
Graphic graphic = new Graphic(mIncidentPoint, incidentSymbol);
mIncidentGraphicsOverlay.getGraphics().add(graphic);
populateParametersAndSolveRoute();
return true;
}
});
}
/**
* Creates facilities around the San Diego region. Facilities are created using point geometry which is then used to
* make graphics for the graphics overlay.
*/
private void createFacilitiesAndGraphics() {
// list of known facilities in the San Diego area
mFacilities = Arrays.asList(
new Facility(new Point(-1.3042129900625112E7, 3860127.9479775648, mWebMercator)),
new Facility(new Point(-1.3042193400557665E7, 3862448.873041752, mWebMercator)),
new Facility(new Point(-1.3046882875518233E7, 3862704.9896770366, mWebMercator)),
new Facility(new Point(-1.3040539754780494E7, 3862924.5938606677, mWebMercator)),
new Facility(new Point(-1.3042571225655518E7, 3858981.773018156, mWebMercator)),
new Facility(new Point(-1.3039784633928463E7, 3856692.5980474586, mWebMercator)),
new Facility(new Point(-1.3049023883956768E7, 3861993.789732541, mWebMercator)));
// image for displaying facility
String facilityUrl = getString(R.string.hospital_symbol_url);
PictureMarkerSymbol facilitySymbol = new PictureMarkerSymbol(facilityUrl);
facilitySymbol.setHeight(30);
facilitySymbol.setWidth(30);
// for each facility, create a graphic and add to graphics overlay
for (Facility facility : mFacilities) {
mFacilityGraphicsOverlay.getGraphics().add(new Graphic(facility.getGeometry(), facilitySymbol));
}
}
/**
* Adds facilities (hospitals) and user's incident (black cross) to closest facility parameters, which will be used to
* display the closest route from the user's incident to its' nearest facility.
*/
private void populateParametersAndSolveRoute() {
mClosestFacilityParameters.setIncidents(Collections.singletonList(new Incident(mIncidentPoint)));
// find closest route using parameters from above
ListenableFuture<ClosestFacilityResult> closestFacilityResultFuture = mClosestFacilityTask
.solveClosestFacilityAsync(mClosestFacilityParameters);
closestFacilityResultFuture.addDoneListener(() -> {
try {
ClosestFacilityResult facilityResult = closestFacilityResultFuture.get();
// a list of closest facilities based on users incident
List<Integer> rankedList = facilityResult.getRankedFacilityIndexes(0);
// get the index of the closest facility to incident
int closestFacility = rankedList.get(0);
// get route from incident to closest facility and display to map view
ClosestFacilityRoute route = facilityResult.getRoute(closestFacility, 0);
mIncidentGraphicsOverlay.getGraphics().add(new Graphic(route.getRouteGeometry(), mRouteSymbol));
} catch (ExecutionException | InterruptedException e) {
String error;
error = e.getMessage().contains("Unable to complete operation") ?
"Incident not within the San Diego Area!" :
"Error getting closest facility result: " + e.getMessage();
Log.e(TAG, error);
Toast.makeText(this, error, Toast.LENGTH_LONG).show();
}
});
}
@Override
protected void onPause() {
mMapView.pause();
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
mMapView.resume();
}
@Override
protected void onDestroy() {
mMapView.dispose();
super.onDestroy();
}
}