How to fetch all the fields from ServiceFeatureTable in arcgis - arcgis

Question

I am using arcgis library 100.0.0 in android for displaying maps and information inside map.
I am using the following code to populate a ServiceFeaturetable using URL provided by arcGis. I am able to load the feature layer successfully into the mapview. I have written code that listens to the click on the symbol on the map, so that I can get some information about the specific feature on the map. I am able to get the specific feature OnClick.
Upon investigating the GetAttributes() result of the specific feature, I realize that it is not having all the fields. After investigating on internet, I found that the FeatureTable.QueryFeaturesAsync could be used to get all the fields of the feature. Even though I have written the code to get all the fields, I do not know how I link this result with the feature layer, so that the feature has all the fields that I require. Here is the code
final ServiceFeatureTable serviceFeatureTable = new ServiceFeatureTable("some URL");
ListenableFuture<FeatureQueryResult> queryresult = serviceFeatureTable.queryFeaturesAsync(null, ServiceFeatureTable.QueryFeatureFields.LOAD_ALL);
// create the feature layer using the service feature table
final FeatureLayer featureLayer = new FeatureLayer(serviceFeatureTable);
featureLayer.setSelectionColor(Color.YELLOW);
featureLayer.setSelectionWidth(10);
// add the layer to the map
mapView.getMap().getOperationalLayers().add(featureLayer);
// set an on touch listener to listen for click events
mapView.setOnTouchListener(new DefaultMapViewOnTouchListener(getContext(), mapView) {
#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, mapView.getMap().getSpatialReference());
QueryParameters query = new QueryParameters();
query.setGeometry(envelope);
// call select features
final ListenableFuture<FeatureQueryResult> future = featureLayer.selectFeaturesAsync(query, FeatureLayer.SelectionMode.NEW);
// add done loading listener to fire when the selection returns
future.addDoneListener(new Runnable() {
#Override
public void run() {
try {
//call get on the future to get the result
FeatureQueryResult result = future.get();
// create an Iterator
Iterator<Feature> iterator = result.iterator();
Feature feature;
// cycle through selections
int counter = 0;
while (iterator.hasNext()){
feature = iterator.next();
counter++;
String name = feature.getAttributes().get(Constants.FIELD_NAME).toString();
Log.d(getResources().getString(R.string.app_name), "Selection #: " + counter + " Table name: " + feature.getFeatureTable().getTableName());
}
//Toast.makeText(getApplicationContext(), counter + " features selected", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Log.e(getResources().getString(R.string.app_name), "Select feature failed: " + e.getMessage());
}
}
});
return super.onSingleTapConfirmed(e);
}
});

Answer 1

Try replacing your code
from
final ListenableFuture<FeatureQueryResult> future = featureLayer.selectFeaturesAsync(query, FeatureLayer.SelectionMode.NEW);
to
final ListenableFuture<FeatureQueryResult> future = serviceFeatureTable.queryFeaturesAsync(query, ServiceFeatureTable.QueryFeatureFields.LOAD_ALL);
It works for me!