Display a basemap centered at an initial location and scale.
Use case
You can set a map's initial location when you want to highlight a particular feature or area to establish the context.
How to use the sample
When the map loads, note the specific location and scale of the initial map view.
How it works
- Create an
ArcGISMap
, specifying a basemap style, latitude and longitude in WGS84, and a level of detail. - Display the map in a map view with
MapView.setMap(map)
.
Relevant API
- BasemapStyle
- Map
- MapView
About the data
The map opens with a topographic map of Esri's headquarters in Redlands, California.
Tags
basemap, center, envelope, extent, initial, lat, latitude, level of detail, location, LOD, long, longitude, scale, zoom level
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.setinitialmaplocation;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
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 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 BasemapStyle topographic
ArcGISMap mMap = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
// set the map to be displayed in this view
mMapView.setMap(mMap);
mMapView.setViewpoint(new Viewpoint(34.056295, -117.195800, 10000));
}
@Override
protected void onPause() {
super.onPause();
mMapView.pause();
}
@Override
protected void onResume() {
super.onResume();
mMapView.resume();
}
@Override
protected void onDestroy() {
super.onDestroy();
mMapView.dispose();
}
}