<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <com.esri.android.map.MapView

        android:id="@+id/map"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        url="http://www.arcgis.com/home/webmap/viewer.html?webmap=fab9925c7c974a0aa47ea0f463535367" >

    </com.esri.android.map.MapView>

</RelativeLayout>

package yanlei.example.com.querydata;

import android.graphics.Color;

import android.os.AsyncTask;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import com.esri.android.map.GraphicsLayer;

import com.esri.android.map.MapView;

import com.esri.android.map.event.OnSingleTapListener;

import com.esri.android.map.event.OnStatusChangedListener;

import com.esri.core.geometry.Point;

import com.esri.core.geometry.SpatialReference;

import com.esri.core.map.Feature;

import com.esri.core.map.FeatureResult;

import com.esri.core.map.Graphic;

import com.esri.core.renderer.SimpleRenderer;

import com.esri.core.symbol.SimpleFillSymbol;

import com.esri.core.tasks.query.QueryParameters;

import com.esri.core.tasks.query.QueryTask;

public class MainActivity extends AppCompatActivity {

    MapView mMapView;

    GraphicsLayer graphicsLayer;

    Graphic fillGraphic;

    String queryLayer;

    boolean boolQuery = true;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        mMapView = (MapView) findViewById(R.id.map);

        queryLayer = "http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Average_Household_Size/MapServer/3";

        mMapView.setOnStatusChangedListener(new OnStatusChangedListener() {

            private static final long serialVersionUID = 1L;

            @Override

            public void onStatusChanged(Object source, STATUS status) {

                // TODO Auto-generated method stub

                if (source == mMapView && status == STATUS.INITIALIZED) {

                    graphicsLayer = new GraphicsLayer();

                    SimpleRenderer sr = new SimpleRenderer(

                            new SimpleFillSymbol(Color.RED));

                    graphicsLayer.setRenderer(sr);

                    mMapView.addLayer(graphicsLayer);

                }

            }

        });

        mMapView.setOnSingleTapListener(new OnSingleTapListener() {

            private static final long serialVersionUID = 1L;

            @Override

            public void onSingleTap(float x, float y) {

                // TODO Auto-generated method stub

                AsyncQueryTask ayncQuery = new AsyncQueryTask();

                ayncQuery.execute(x, y);

            }

        });

    }

    private class AsyncQueryTask extends AsyncTask<Float, Void, FeatureResult> {

        @Override

        protected FeatureResult doInBackground(Float... queryArray) {

            // TODO Auto-generated method stub

            if (queryArray == null || queryArray.length <= 1)

                return null;

            float x = queryArray[0];

            float y = queryArray[1];

            Point point = mMapView.toMapPoint(x, y);

            QueryParameters qParameters = new QueryParameters();

            SpatialReference sr = SpatialReference.create(102100);

            qParameters.setGeometry(point);

            qParameters.setOutSpatialReference(sr);

            qParameters.setReturnGeometry(true);

            QueryTask qTask = new QueryTask(queryLayer);

            try {

                FeatureResult results = qTask.execute(qParameters);

                return results;

            } catch (Exception e) {

                e.printStackTrace();

            }

            return null;

        }

        @Override

        protected void onPostExecute(FeatureResult results) {

            if (results != null) {

                for (Object element : results) {

                    if (element instanceof Feature) {

                        Feature feature = (Feature) element;

                        // turn feature into graphic

                        Graphic graphic = new Graphic(feature.getGeometry(),

                                feature.getSymbol(), feature.getAttributes());

                        // add graphic to layer

                        graphicsLayer.removeAll();

                        graphicsLayer.addGraphic(graphic);

                    }

                }

            }

        }

    }

    @Override

    protected void onPause() {

        super.onPause();

        mMapView.pause();

    }

    @Override

    protected void onResume() {

        super.onResume();

        mMapView.unpause();

    }

}