Set the map view to a new viewpoint.
Use case
Programmatically navigate to a specified location in the map or scene. Use this to focus on a particular point or area of interest.
How to use the sample
The map view has several methods for setting its current viewpoint. Select a viewpoint from the UI to see the viewpoint changed using that method.
How it works
- Create a new
ArcGISMap
object and set it to theMapView
object. - Change the map's
Viewpoint
using one of the available methods:
- Use
MapView.setViewpointAsync()
to pan to a viewpoint over the specified length of time. - Use
MapView.setViewpointCenterAsync()
to center the viewpoint on aPoint
and set a distance from the ground using a scale. - Use
MapView.setViewpointGeometryAsync()
to set the viewpoint to a givenGeometry
.
Relevant API
- ArcGISMap
- Geometry
- MapView
- Point
- Viewpoint
Additional information
Below are some other ways to set a viewpoint:
- setViewpoint
- setViewpointAsync
- setViewpointCenterAsync
- setViewpointGeometryAsync
- setViewpointRotationAsync
- setViewpointScaleAsync
Tags
animate, extent, pan, rotate, scale, view, zoom
Sample Code
/* 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.changeviewpoint;
import android.os.Bundle;
import android.view.View;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.PointCollection;
import com.esri.arcgisruntime.geometry.Polyline;
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.MapView;
public class MainActivity extends AppCompatActivity {
private static final int SCALE = 5000;
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);
// inflate MapView from layout
mMapView = findViewById(R.id.mapView);
// create a map with an imagery base map
ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_IMAGERY);
// set the map to be displayed in this view
mMapView.setMap(map);
mMapView.setViewpoint(new Viewpoint(new Point(-14093.0, 6711377.0, SpatialReferences.getWebMercator()), SCALE));
}
public void onAnimateClicked(View view) {
// create the London location point
Point londonPoint = new Point(-14093.0, 6711377.0, SpatialReferences.getWebMercator());
// create the viewpoint with the London point and scale
Viewpoint viewpoint = new Viewpoint(londonPoint, SCALE);
// set the map view's viewpoint to London with a seven second animation duration
mMapView.setViewpointAsync(viewpoint, 7f);
}
public void onCenterClicked(View view) {
// create the Waterloo location point
Point waterlooPoint = new Point(-12153.0, 6710527.0, SpatialReferences.getWebMercator());
// set the map view's viewpoint centered on Waterloo and scaled
mMapView.setViewpointCenterAsync(waterlooPoint, SCALE);
}
public void onGeometryClicked(View view) {
// create a collection of points around Westminster
PointCollection westminsterPoints = new PointCollection(SpatialReferences.getWebMercator());
westminsterPoints.add(new Point(-13823.0, 6710390.0));
westminsterPoints.add(new Point(-13823.0, 6710150.0));
westminsterPoints.add(new Point(-14680.0, 6710390.0));
westminsterPoints.add(new Point(-14680.0, 6710150.0));
Polyline geometry = new Polyline(westminsterPoints);
// set the map view's viewpoint to Westminster
mMapView.setViewpointGeometryAsync(geometry);
}
@Override
protected void onPause() {
super.onPause();
mMapView.pause();
}
@Override
protected void onResume() {
super.onResume();
mMapView.resume();
}
@Override
protected void onDestroy() {
super.onDestroy();
mMapView.dispose();
}
}