How to get a listener for many Feature Layers in ArcGIS Android?

[GaelDurand]

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I have two Feature Layers added into a Map that I can see when I display the MapView. However, it's only the last added Feature Layer that can be processed by the Touch Listener. I cannot figure out how to make all Features Layers taken into account by the Touch Listener. My goal is to differentiate a click on a CARTO_ETARE's feature from a click on a CARTO_PT_EAU's one. Any help would be appreciated. import android.Manifest; import android.content.pm.PackageManager; import android.graphics.Color; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.widget.Toast; import com.esri.arcgisruntime.concurrent.ListenableFuture; import com.esri.arcgisruntime.data.Feature; import com.esri.arcgisruntime.data.FeatureQueryResult; import com.esri.arcgisruntime.data.Geodatabase; import com.esri.arcgisruntime.data.GeodatabaseFeatureTable; import com.esri.arcgisruntime.data.QueryParameters; import com.esri.arcgisruntime.geometry.Envelope; import com.esri.arcgisruntime.geometry.Point; import com.esri.arcgisruntime.layers.FeatureLayer; import com.esri.arcgisruntime.mapping.ArcGISMap; import com.esri.arcgisruntime.mapping.Basemap; import com.esri.arcgisruntime.mapping.view.DefaultMapViewOnTouchListener; import com.esri.arcgisruntime.mapping.view.GraphicsOverlay; import com.esri.arcgisruntime.mapping.view.MapView; import com.google.android.gms.tasks.OnCompleteListener; import com.sigpau.sigpau.R; import java.io.File; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.Map; import java.util.Set; import static com.sigpau.sigpau.R.id.mapView; // TIP: "Invalidate caches and Restart" in Android Studio in case of debugger unreachable public class MainActivityDemo extends AppCompatActivity implements View.OnClickListener, OnCompleteListener<Void> {     private MapView mMapView;     private static File extStorDir;     private static String extSDCardDirName;     private static String geodbFilename;     private static String mGeoDb;     private Geodatabase mGeodatabase;     // define permission to request     private final String[] reqPermission = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE};     private ArcGISMap mMap;     private FeatureLayer mFeatureLayer;     private ListenableFuture<FeatureQueryResult> mFuture;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         // inflate MapView from layout         mMapView = (MapView) findViewById(mapView);         // create a map with the streets basemap         mMap = new ArcGISMap(Basemap.Type.TOPOGRAPHIC, 48.1119800, -1.6742900, 14);         //set an initial viewpoint         // set the map to be displayed in the MapView         mMapView.setMap(mMap);         // create the path to local data         extStorDir = Environment.getExternalStorageDirectory();         extSDCardDirName = this.getResources().getString(R.string.config_data_sdcard_offline_dir);         geodbFilename = this.getResources().getString(R.string.config_geodb_name);         // full path to data         mGeoDb = createGeoDbFilePath();         ActivityCompat.requestPermissions(MainActivityDemo.this, reqPermission, 2);     }     /**      * Handle the permissions request response      */     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {         if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {             // create a new Geodatabase from local path             mGeodatabase = new Geodatabase(mGeoDb);             // load the geodatabase             mGeodatabase.loadAsync();             // add feature layer from geodatabase to the ArcGISMap             mGeodatabase.addDoneLoadingListener(new Runnable() {                 @Override                 public void run() {                     for (GeodatabaseFeatureTable geoDbTable : mGeodatabase.getGeodatabaseFeatureTables()){                         ArrayList<String> list_of_tables = new ArrayList<String>();                         list_of_tables.add("CARTO_ETARE");                         list_of_tables.add("CARTO_PT_EAU");                         Set<String> set = new HashSet<String>(list_of_tables);                         if (set.contains(geoDbTable.getTableName())) {                             mFeatureLayer = new FeatureLayer(geoDbTable);                             mFeatureLayer.setSelectionColor(Color.YELLOW);                             mFeatureLayer.setLabelsEnabled(true);                             mFeatureLayer.setSelectionWidth(10);                             //featureLayer.selectFeatures();                             mMap.getOperationalLayers().add(mFeatureLayer);                             mMapView.setMap(mMap);                             // set an on touch listener to listen for click events                             mMapView.setOnTouchListener(new DefaultMapViewOnTouchListener(MainActivityDemo.this, mMapView) {                                 @Override                                 public boolean onSingleTapConfirmed(MotionEvent e) {                                     // get the point that was clicked and convert it to a point in map coordinates                                     Point clickPoint = mMapView.screenToLocation(new android.graphics.Point(Math.round(e.getX()), Math.round(e.getY())));                                     int tolerance = 10;                                     double mapTolerance = tolerance * mMapView.getUnitsPerDensityIndependentPixel();                                     // create objects required to do a selection with a query                                     Envelope envelope = new Envelope(clickPoint.getX() - mapTolerance,                                             clickPoint.getY() - mapTolerance,                                             clickPoint.getX() + mapTolerance,                                             clickPoint.getY() + mapTolerance,                                             mMap.getSpatialReference());                                     QueryParameters query = new QueryParameters();                                     query.setGeometry(envelope);                                     // call select features                                     mFuture = mFeatureLayer.selectFeaturesAsync(query, FeatureLayer.SelectionMode.ADD);                                     // add done loading listener to fire when the selection returns                                     mFuture.addDoneListener(new Runnable() {                                         @Override                                         public void run() {                                             try {                                                 //call get on the future to get the result                                                 FeatureQueryResult result = mFuture.get();                                                 // create an Iterator                                                 Iterator<Feature> iterator = result.iterator();                                                 Feature feature;                                                 while (iterator.hasNext()) {                                                     feature = iterator.next();                                                     Map<String, Object> attributes = feature.getAttributes();                                                     if(feature.getFeatureTable().getTableName().equals("CARTO_PT_EAU")) {                                                         Toast.makeText(getApplicationContext(), Long.toString((Long)attributes.get("ID_PT_EAU")), Toast.LENGTH_SHORT).show();                                                     }                                                     else if(feature.getFeatureTable().getTableName().equals("CARTO_ETARE")) {                                                         Toast.makeText(getApplicationContext(), Long.toString((Long)attributes.get("CARTO_ETARE")), Toast.LENGTH_SHORT).show();                                                     }                                                 }                                             } catch (Exception e) {                                                 Log.e(getResources().getString(R.string.app_name), "Select feature failed: " + e.getMessage());                                             }                                         }                                     });                                     return super.onSingleTapConfirmed(e);                                 }                             });                         }                     }                 }             });         } else {             // report to user that permission was denied             Toast.makeText(MainActivityDemo.this, getResources().getString(R.string.location_permission_denied),                     Toast.LENGTH_SHORT).show();         }     }     /**      * Create the mobile geodatabase file location and name structure      */     private static String createGeoDbFilePath() {         return extStorDir.getAbsolutePath() + File.separator + extSDCardDirName + File.separator + geodbFilename;     } }

[AlexanderNohe1]

Can you post your code so its on seperate lines?  It is a little hard to read here...

[GaelDurand]

The update is done.

Sorry for the long line...

[AlexanderNohe1]

Is there a reason that you are not using the identifyLayerAync method on the mapview?

This should return an identifyLayerResult which you can use to get all the identified features with.

[GaelDurand]

Hi,

Thanks for the idea, but it's still not working because the Point passed to identifyLayersAsync is recognized as an android.graphics.point. That's weird.

What I've done so far:

                            mMapView.setOnTouchListener(new DefaultMapViewOnTouchListener(MainActivity.this, mMapView) {
                                @Override
                                public boolean onSingleTapConfirmed(MotionEvent e) {

                                    mInfoButton.setVisibility(View.GONE);
                                    mContactButton.setVisibility(View.GONE);
                                    mPlanButton.setVisibility(View.GONE);

                                    Point gps = new Point(-1.640235, 48.127568, SpatialReferences.getWgs84());
                                    final ListenableFuture<List<IdentifyLayerResult>> identifyFuture = mMapView.identifyLayersAsync(gps, 20, false, 25);

// add a listener to the future
                                    identifyFuture.addDoneListener(new Runnable() {
                                        @Override
                                        public void run() {
                                            try {
                                                // get the identify results from the future - returns when the operation is complete
                                                List<IdentifyLayerResult> identifyLayersResults = identifyFuture.get();

                                                // iterate all the layers in the identify result
                                                for (IdentifyLayerResult identifyLayerResult : identifyLayersResults) {

                                                    // iterate each result in each identified layer, and check for Feature results
                                                    for (GeoElement identifiedElement : identifyLayerResult.getElements()) {
                                                        if (identifiedElement instanceof Feature) {

                                                        }
                                                    }
                                                }
                                            } catch (InterruptedException | ExecutionException ex) {
                                                Log.e(getResources().getString(R.string.app_name), ex.getMessage());
                                            }
                                        }
                                    });

[AlexanderNohe1 · Accepted solution]

Hi durand.gael‌,

The point passed to the identifyLayerAsync method is a android.graphic.point so you can pass in the screen location that was touched to do the identify.  It takes care of all the conversion to a localized point for you.  This allows you to quickly implement the touch to identify rather than having to go through the process of manually converting the point.

[GaelDurand]

Hi Alexander,

Thanks for the answer. 

This is how I create the point from the screen touch: 

final ListenableFuture<List<IdentifyLayerResult>> identifyFuture = mMapView.identifyLayersAsync(new android.graphics.Point(Math.round(e.getX()), Math.round(e.getY())), 20, false, 25);