Opacity fade
A newer version of the Maps SDK is available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 A newer version of the SDK is available.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, v11.9.0, 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. The dependencies can be found here.The examples use View binding.See setup documention if necessary.
activity_satellite_opacity_on_zoom
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".examples.styles.SatelliteOpacityOnZoomActivity">
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/swap_streets_and_satellite_order_toggle_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="16dp"
app:srcCompat="@drawable/ic_swap_horiz_white_24dp"
tools:backgroundTint="@color/colorAccent" />
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:mapbox_cameraTargetLat="30.044"
mapbox:mapbox_cameraTargetLng="31.235"
mapbox:mapbox_cameraZoom="10"
mapbox:mapbox_cameraZoomMin="6"
/>
</FrameLayout>
SatelliteOpacityOnZoomActivity.java
package com.mapbox.mapboxandroiddemo.examples.styles;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraPosition;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
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.expressions.Expression;
import com.mapbox.mapboxsdk.style.layers.Layer;
import com.mapbox.mapboxsdk.style.layers.PropertyValue;
import com.mapbox.mapboxsdk.style.layers.RasterLayer;
import com.mapbox.mapboxsdk.style.sources.RasterSource;
import static com.mapbox.mapboxsdk.style.expressions.Expression.interpolate;
import static com.mapbox.mapboxsdk.style.expressions.Expression.linear;
import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;
import static com.mapbox.mapboxsdk.style.expressions.Expression.zoom;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.rasterOpacity;
/**
* Create an effect of seamlessly fading from one map style to another with runtime styling opacity.
* Go from the Mapbox Streets style to a satellite photo raster layer as the map camera zooms in.
* This is similar to how Snap uses Mapbox for Snap Maps.
*/
public class SatelliteOpacityOnZoomActivity extends AppCompatActivity implements
OnMapReadyCallback {
private static final String SATELLITE_RASTER_SOURCE_ID = "SATELLITE_RASTER_SOURCE_ID";
private static final String SATELLITE_RASTER_LAYER_ID = "SATELLITE_RASTER_LAYER_ID";
private MapView mapView;
private MapboxMap mapboxMap;
private boolean satelliteSetToReveal = false;
private PropertyValue<Expression> expressionRevealingSatellite = rasterOpacity(interpolate(linear(), zoom(),
stop(15, 0),
stop(18, 1)
));
private PropertyValue<Expression> expressionRevealingMapboxStreets = rasterOpacity(interpolate(linear(), zoom(),
stop(12, 1),
stop(16, 0)
));
@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_satellite_opacity_on_zoom);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
mapboxMap.setStyle(Style.MAPBOX_STREETS, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
SatelliteOpacityOnZoomActivity.this.mapboxMap = mapboxMap;
// Create a data source for the satellite raster image and add the source to the map
style.addSource(new RasterSource(SATELLITE_RASTER_SOURCE_ID,
"mapbox://mapbox.satellite", 512));
// Create a new map layer for the satellite raster images and add the satellite layer to the map.
// Use runtime styling to adjust the satellite layer's opacity based on the map camera's zoom level
style.addLayer(
new RasterLayer(SATELLITE_RASTER_LAYER_ID, SATELLITE_RASTER_SOURCE_ID).withProperties(
expressionRevealingSatellite));
// Create a new camera position and animate the map camera to show the fade in/out UI of the satellite layer
mapboxMap.animateCamera(
CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.zoom(19)
.build()), 9000);
findViewById(R.id.swap_streets_and_satellite_order_toggle_fab).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
swapStreetsAndSatelliteOrder();
Toast.makeText(SatelliteOpacityOnZoomActivity.this,
R.string.zoom_in_and_out_instruction, Toast.LENGTH_SHORT).show();
}
});
}
});
}
private void swapStreetsAndSatelliteOrder() {
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
Layer satelliteLayer = style.getLayer(SATELLITE_RASTER_LAYER_ID);
if (satelliteLayer != null) {
satelliteLayer.setProperties(
satelliteSetToReveal ? expressionRevealingSatellite : expressionRevealingMapboxStreets
);
}
satelliteSetToReveal = !satelliteSetToReveal;
}
});
}
// Add the mapView lifecycle to the activity's lifecycle methods
@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);
}
}