Keep the view points of two views (e.g. MapView and SceneView) synchronized with each other.
Use case
You might need to synchronize GeoView viewpoints if you had two map views in one application - a main map and an inset. An inset map view could display all the layers at their full extent and contain a hollow rectangular graphic that represents the visible extent of the main map view. As you zoom or pan in the main map view, the extent graphic in the inset map would adjust accordingly.
How to use the sample
Interact with the MapView or SceneView by zooming or panning. The other MapView or SceneView will automatically focus on the same viewpoint.
How it works
- Wire up the
ViewpointChanged
event handler for both geo views. - In each event handler, get the current viewpoint from the geo view that is being interacted with and then set the viewpoint of the other geo view to the same value.
Relevant API
- GeoView
- MapView
- SceneView
About the data
This application provides two different perspectives of the Imagery basemap. A 2D MapView as well as a 3D SceneView, displayed side by side.
Tags
3D, automatic refresh, event, event handler, events, extent, interaction, interactions, pan, sync, synchronize, zoom
Sample 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.arcgisruntime.sample.syncmapandsceneviewpoints;
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.ArcGISScene;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.GeoView;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.mapping.view.SceneView;
public class MainActivity extends AppCompatActivity {
private MapView mMapView;
private SceneView mSceneView;
@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 and set a map to it
mMapView = findViewById(R.id.mapView);
ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_IMAGERY);
mMapView.setMap(map);
// get a reference to the scene view and set a scene to it
mSceneView = findViewById(R.id.sceneView);
ArcGISScene scene = new ArcGISScene(BasemapStyle.ARCGIS_IMAGERY);
mSceneView.setScene(scene);
// on viewpoint change synchronize viewpoints
mMapView.addViewpointChangedListener(viewpointChangedEvent -> synchronizeViewpoints(mMapView, mSceneView));
mSceneView.addViewpointChangedListener(viewpointChangedEvent -> synchronizeViewpoints(mSceneView, mMapView));
}
/**
* Synchronizes the viewpoint across GeoViews when the user is navigating.
*/
private static void synchronizeViewpoints(GeoView navigatingGeoView, GeoView geoViewToSync) {
if (navigatingGeoView.isNavigating()) {
Viewpoint navigatingViewpoint = navigatingGeoView.getCurrentViewpoint(Viewpoint.Type.CENTER_AND_SCALE);
geoViewToSync.setViewpoint(navigatingViewpoint);
}
}
@Override
protected void onPause() {
mMapView.pause();
mSceneView.pause();
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
mMapView.resume();
mSceneView.resume();
}
@Override
protected void onDestroy() {
mMapView.dispose();
mSceneView.dispose();
super.onDestroy();
}
}