# Feature count

> **Note (legacy): A newer version of the Maps SDK is available**
> 
> This page uses v9.7.1 of the Mapbox Maps SDK. A newer version of the SDK is available. Learn about the latest version, v11.29.0, in the [Maps SDK documentation](https://docs.mapbox.com/android/maps/guides/).

Your browser doesn't support HTML5 video. Open [link to the video](https://docs.mapbox.com/android/android/assets/medias/maps-example-feature-count-activity-8329ffd639500c93636f6ab162f0682b.mp4).

> **Note**
> 
> This example is a part of the [Mapbox Android Demo app](https://github.com/mapbox/mapbox-android-demo). You can find the values for all referenced resources in the [`res`](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/res) directory. For example, see [`res/values/activity_strings.xml`](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/res/values/activity_strings.xml) for `R.string.*` references used in this example. The dependencies can be found [here.](https://github.com/mapbox/mapbox-navigation-android-examples/blob/main/app/build.gradle) The examples use View binding. [See setup documention if necessary.](https://developer.android.com/topic/libraries/view-binding)

Title: `activity_query_feature_count`

[View on GitHub](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/res/layout/activity_query_feature_count.xml)

```xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:mapbox="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/query_feature_count_map_container"
    tools:context=".examples.query.FeatureCountActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <com.mapbox.mapboxsdk.maps.MapView
            android:id="@+id/mapView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            mapbox:mapbox_cameraTargetLat="40.73581"
            mapbox:mapbox_cameraTargetLng="-73.99155"
            mapbox:mapbox_cameraZoom="16"/>

        <FrameLayout
            android:id="@+id/selection_box"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:layout_centerInParent="true"
            android:alpha="0.3"
            android:background="#A4A4E5"/>

    </RelativeLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>
```

**Java**

Title: `FeatureCountActivity.java`

[View on GitHub](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/examples/query/FeatureCountActivity.java)

```java
package com.mapbox.mapboxandroiddemo.examples.query;

import android.graphics.Color;
import android.graphics.RectF;
import android.os.Bundle;
import androidx.annotation.NonNull;
import com.google.android.material.snackbar.Snackbar;
import androidx.appcompat.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;

import com.mapbox.geojson.Feature;
import com.mapbox.geojson.FeatureCollection;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.layers.FillLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;

import java.util.List;

import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillColor;

/**
 * Get the feature count inside of a bounding box and highlight all of the buildings in the box.
 */
public class FeatureCountActivity extends AppCompatActivity {

  private MapView mapView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Mapbox access token is configured here. This needs to be called either in your application
    // object or in the same activity which contains the mapview.
    Mapbox.getInstance(this, getString(R.string.access_token));

    // This contains the MapView in XML and needs to be called after the access token is configured.
    setContentView(R.layout.activity_query_feature_count);

    // Define our views, ones the center box and the others our view container used for the
    // snackbar.
    final View selectionBox = findViewById(R.id.selection_box);
    final View viewContainer = findViewById(R.id.query_feature_count_map_container);

    mapView = findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(new OnMapReadyCallback() {
      @Override
      public void onMapReady(@NonNull final MapboxMap mapboxMap) {

        mapboxMap.setStyle(Style.LIGHT, new Style.OnStyleLoaded() {
          @Override
          public void onStyleLoaded(@NonNull final Style style) {

            style.addSource(new GeoJsonSource("highlighted-shapes-source"));

            // add a layer to the map that highlights the maps buildings inside the bounding box.
            style.addLayer(
              new FillLayer("highlighted-shapes-layer", "highlighted-shapes-source")
                .withProperties(fillColor(Color.parseColor("#50667F"))));

            // Toast instructing user to tap on the box
            Toast.makeText(
              FeatureCountActivity.this,
              getString(R.string.tap_on_feature_box_instruction),
              Toast.LENGTH_LONG
            ).show();

            selectionBox.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                // Perform feature query within the selectionBox. The bounding box is
                // calculated using the view but you can also use a map bounding box made up
                // of latitudes and longitudes.
                int top = selectionBox.getTop() - mapView.getTop();
                int left = selectionBox.getLeft() - mapView.getLeft();
                RectF box = new RectF(left, top, left + selectionBox.getWidth(), top + selectionBox.getHeight());
                List<Feature> features = mapboxMap.queryRenderedFeatures(box, "building");

                // Show the features count
                Snackbar.make(
                  viewContainer,
                  String.format(getString(R.string.feature_count_snackbar_feature_size), features.size()),
                  Snackbar.LENGTH_LONG).show();

                GeoJsonSource source = style.getSourceAs("highlighted-shapes-source");
                if (source != null) {
                  source.setGeoJson(FeatureCollection.fromFeatures(features));
                }
              }
            });
          }
        });
      }
    });
  }

  @Override
  public void onResume() {
    super.onResume();
    mapView.onResume();
  }

  @Override
  protected void onStart() {
    super.onStart();
    mapView.onStart();
  }

  @Override
  protected void onStop() {
    super.onStop();
    mapView.onStop();
  }

  @Override
  public void onPause() {
    super.onPause();
    mapView.onPause();
  }

  @Override
  public void onLowMemory() {
    super.onLowMemory();
    mapView.onLowMemory();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    mapView.onSaveInstanceState(outState);
  }
}
```