Как сделать ArcGIS Runtime SDK для Android FeatureCollectionTable показать метку или текст на карте?

Question

1. как сделать ArcGIS Runtime SDK для Android FeatureCollectionTable показать метку или текст на карте?
2. или другая функция?

        import com.esri.arcgisruntime.geometry.SpatialReferences;
            //create shootRender
    public class ShootRender {
                private FeatureCollectionTable pointTable;
                //TestModel:Point json,labelText
                public void myRender(FeatureCollection featureCollection,List<TestModel> labels){
                    pointTable = new FeatureCollectionTable(fields, GeometryType.POINT, SpatialReferences.getWgs84());
                    featureCollection.getTables().add(pointTable);
                    if(labels!=null){
                        for(TestModel item:labels){
                            //this is show last labelText? how to do write？
                            TextSymbol textSymbol = new TextSymbol(12, item.labelText, Color.RED, TextSymbol.HorizontalAlignment.CENTER, TextSymbol.VerticalAlignment.MIDDLE);
                            SimpleRenderer renderer=new SimpleRenderer(textSymbol);
                            pointTable.setRenderer(renderer);
                            Point point =(Point) Geometry.fromJson(item.geoJson);
                            Map<String, Object> attributes = new HashMap<>();
                            Feature feature = pointTable.createFeature(attributes, point);
                            pointTable.addFeatureAsync(feature);
                        }
                    }
                }
            }