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Use GeoJSON data to set extrusion height

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This page uses v9.7.1 of the Mapbox Maps SDK. A newer version of the SDK is available. Learn about the latest version, v11.3.0, in the Maps SDK documentation.
Note

This example is a part of the Mapbox Android Demo app. You can find the values for all referenced resources in the res directory. For example, see res/values/activity_strings.xml for R.string.* references used in this example.

activity_marathon_extrusion
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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"
tools:context="com.mapbox.mapboxandroiddemo.examples.extrusions.MarathonExtrusionActivity">

<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="0dp"
android:layout_marginLeft="0dp"
android:layout_marginRight="0dp"
android:layout_marginTop="0dp"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintHorizontal_bias="0.0"
mapbox:layout_constraintLeft_toLeftOf="parent"
mapbox:layout_constraintRight_toRightOf="parent"
mapbox:layout_constraintTop_toTopOf="parent"
mapbox:layout_constraintVertical_bias="1.0"
mapbox:mapbox_cameraTargetLat="33.334915"
mapbox:mapbox_cameraZoomMin="11"
mapbox:mapbox_cameraTargetLng="-118.335074"
mapbox:mapbox_cameraTilt="55.8873"
mapbox:mapbox_cameraZoom="12.692151"
/>

</androidx.constraintlayout.widget.ConstraintLayout>
MarathonExtrusionActivity.java
package com.mapbox.mapboxandroiddemo.examples.extrusions;

import android.graphics.Color;
import android.os.Bundle;

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.FillExtrusionLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;

import java.net.URI;
import java.net.URISyntaxException;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import timber.log.Timber;

import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionHeight;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionOpacity;

/**
* Use data-driven styling and GeoJSON data to set extrusions' heights
*/
public class MarathonExtrusionActivity extends AppCompatActivity implements OnMapReadyCallback {

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_marathon_extrusion);

mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}

@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
mapboxMap.setStyle(Style.SATELLITE, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
try {
// Add the marathon route source to the map
// Create a GeoJsonSource and use the Mapbox Datasets API to retrieve the GeoJSON data
// More info about the Datasets API at https://www.mapbox.com/api-documentation/#retrieve-a-dataset
GeoJsonSource courseRouteGeoJson = new GeoJsonSource(
"coursedata", new URI("asset://marathon_route.geojson"));
style.addSource(courseRouteGeoJson);

// Add FillExtrusion layer to map using GeoJSON data
style.addLayer(new FillExtrusionLayer("course", "coursedata").withProperties(
fillExtrusionColor(Color.YELLOW),
fillExtrusionOpacity(0.7f),
fillExtrusionHeight(get("e"))));

} catch (URISyntaxException exception) {
Timber.d(exception);
}
}
});
}

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

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

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

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

@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);
}
}