You can select features to visually distinguish them with a selection color or highlighting. This can be useful to demonstrate the physical extent or associated attributes of a feature, or to initiate another action such as centering that feature in the scene view.
How to use the sample
Tap a building in the scene layer to select it. Deselect buildings by tapping away from the buildings.
How it works
Create an ArcGISSceneLayer passing in the URL to a scene layer service.
Use sceneView.setOnTouchListener(...) to get the screen tap location screenPoint.
Call sceneView.identifyLayersAsync(sceneLayer, screenPoint, tolerance, false, 1) to identify features in the scene.
From the resulting IdentifyLayerResult, get the list of identified GeoElements with result.getElements().
Get the first element in the list, checking that it is a feature, and call sceneLayer.selectFeature(feature) to select it.
/* 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.scenelayerselection;
import java.util.List;
import java.util.concurrent.ExecutionException;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.Toast;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.data.Feature;
import com.esri.arcgisruntime.layers.ArcGISSceneLayer;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISScene;
import com.esri.arcgisruntime.mapping.ArcGISTiledElevationSource;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.GeoElement;
import com.esri.arcgisruntime.mapping.Surface;
import com.esri.arcgisruntime.mapping.view.Camera;
import com.esri.arcgisruntime.mapping.view.DefaultSceneViewOnTouchListener;
import com.esri.arcgisruntime.mapping.view.IdentifyLayerResult;
import com.esri.arcgisruntime.mapping.view.SceneView;
publicclassMainActivityextendsAppCompatActivity{
privatestaticfinal String TAG = MainActivity.class.getSimpleName();
private SceneView mSceneView;
@OverrideprotectedvoidonCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// create a scene and add a basemap to it ArcGISScene scene = new ArcGISScene();
scene.setBasemap(Basemap.createImagery());
// set the scene to the scene view mSceneView = findViewById(R.id.sceneView);
mSceneView.setScene(scene);
// add base surface with elevation data Surface surface = new Surface();
final String elevationService = getString(R.string.world_elevation_url);
surface.getElevationSources().add(new ArcGISTiledElevationSource(elevationService));
scene.setBaseSurface(surface);
// add a scene layer of Harvard buildings to the scenefinal String buildings = getString(R.string.brest_buildings);
ArcGISSceneLayer sceneLayer = new ArcGISSceneLayer(buildings);
scene.getOperationalLayers().add(sceneLayer);
// add a camera and initial camera position Camera camera = new Camera(48.378, -4.494, 200, 345, 65, 0);
mSceneView.setViewpointCamera(camera);
// zoom to the layer's extent when loaded sceneLayer.addDoneLoadingListener(() -> {
if (sceneLayer.getLoadStatus() == LoadStatus.LOADED) {
// when the scene is clicked, identify the clicked feature and select it mSceneView.setOnTouchListener(new DefaultSceneViewOnTouchListener(mSceneView) {
@OverridepublicbooleanonSingleTapConfirmed(MotionEvent motionEvent){
// clear any previous selection sceneLayer.clearSelection();
android.graphics.Point screenPoint = new android.graphics.Point(Math.round(motionEvent.getX()),
Math.round(motionEvent.getY()));
// identify clicked feature ListenableFuture<IdentifyLayerResult> identify = mSceneView
.identifyLayerAsync(sceneLayer, screenPoint, 10, false, 1);
identify.addDoneListener(() -> {
try {
// get the identified result and check that it is a feature IdentifyLayerResult result = identify.get();
List<GeoElement> geoElements = result.getElements();
if (!geoElements.isEmpty()) {
Log.d(TAG, "geoelement not empty");
GeoElement geoElement = geoElements.get(0);
if (geoElement instanceof Feature) {
// select the feature sceneLayer.selectFeature((Feature) geoElement);
}
}
} catch (InterruptedException | ExecutionException e) {
String error = "Error while identifying layer result: " + e.getMessage();
Log.e(TAG, error);
Toast.makeText(MainActivity.this, error, Toast.LENGTH_LONG).show();
}
});
returntrue;
}
});
} elseif (sceneLayer.getLoadStatus() == LoadStatus.FAILED_TO_LOAD) {
String error = "Error loading scene layer " + sceneLayer.getLoadStatus();
Log.e(TAG, error);
Toast.makeText(this, error, Toast.LENGTH_LONG).show();
}
});
}
@OverrideprotectedvoidonPause(){
super.onPause();
mSceneView.pause();
}
@OverrideprotectedvoidonResume(){
super.onResume();
mSceneView.resume();
}
@OverrideprotectedvoidonDestroy(){
super.onDestroy();
mSceneView.dispose();
}
}