Examples
Getting started (3)Create a simple map viewDynamically build a map viewSupport map fragmentDynamic styling (30)Add a new layer below labelsAdd a vector tile sourceHillshadingAdd a WMS sourceAdjust a layer's opacityAnimate marker positionAnimated image source (GIF)Icon update based on API responseChange a layer's colorChange a map's languageColor dependent on zoom levelClick to add photoIndoor MapSymbol layer iconsStyle with missing iconMarker following routePicture in picturePulsing layer opacityShow time lapseButton interaction stylingText anchor positionOpacity fadeShow and hide layersSymbolLayer iconsMultiple text formatsAdjust text labelsTransparent render surfaceUse an image sourceAnimated icon movementVariable label placementExtrusions (5)Adjust light location and colorDisplay 3D building height based on vector dataExtrude polygons for 3D indoor mappingRotate and tilt with 3D buildingsUse GeoJSON data to set extrusion heightCamera (5)Animate the map cameraFit camera in bounding boxRestrict map panningRotating cameraZoom to show a cluster's leavesData visualization (33)Baseball spray chartDisplay water depthBiometric fingerprintCalendar integrationCircle icon toggleCircleLayer clustersCircle to icon transitionCircle radiusCreate a line layerCreate hotspots from pointsData time lapseShow heatmap dataDraw a GeoJSON lineDraw a polygon with holesDraw multiple geometriesDraw a polygonJoin local JSON data with vector tile geometriesLine gradientLine behind moving iconMultiple expressionsIcon setting based on Feature propertyOutlined polygon holeSatellite land selectShared preferencesStyle circles categoricallyStyle lines using an identity property functionSpinning iconToggle collision detectionSymbolLayer clusteringSymbol layer info windowZoom-based icon switchUpdate a choropleth layer by zoom levelStyling heatmapsOffline (3)Cache managementA simple offline mapOffline managerQuerying the map (3)Building outlineQuery a map featureSelect a buildingMap style (4)Style attributionMapbox Studio styleLocal style or custom raster styleDefault stylesUser interaction (12)Click on single layerFeature countDrawing search areaSymbol layer icon size changeHighlighted lineInset mapLocation pickerBackground fogRecyclerView interactionSearch again in an areaSnaking directionsRecyclerView DirectionsImage generation (2)Snapshot NotificationShare snapshot imageDevice location (7)Track device locationBasic pulsing locationLocation camera optionsCustom pulsing locationCustomized location iconShow a user's locationShow a user's location on a map fragment

CircleLayer clusters

activity_circle_layer_clustering
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
tools:context="com.mapbox.mapboxandroiddemo.examples.dds.CircleLayerClusteringActivity">
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
CircleLayerClusteringActivity.java
package com.mapbox.mapboxandroiddemo.examples.dds;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.Toast;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
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.CircleLayer;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.layers.TransitionOptions;
import com.mapbox.mapboxsdk.style.sources.GeoJsonOptions;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.utils.BitmapUtils;
import java.net.URI;
import java.net.URISyntaxException;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import timber.log.Timber;
import static com.mapbox.mapboxsdk.style.expressions.Expression.all;
import static com.mapbox.mapboxsdk.style.expressions.Expression.division;
import static com.mapbox.mapboxsdk.style.expressions.Expression.exponential;
import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.expressions.Expression.gte;
import static com.mapbox.mapboxsdk.style.expressions.Expression.has;
import static com.mapbox.mapboxsdk.style.expressions.Expression.interpolate;
import static com.mapbox.mapboxsdk.style.expressions.Expression.literal;
import static com.mapbox.mapboxsdk.style.expressions.Expression.lt;
import static com.mapbox.mapboxsdk.style.expressions.Expression.rgb;
import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;
import static com.mapbox.mapboxsdk.style.expressions.Expression.toNumber;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconSize;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textIgnorePlacement;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textSize;
/**
* Use GeoJSON and circle layers to visualize point data as circle clusters.
*/
public class CircleLayerClusteringActivity extends AppCompatActivity {
private MapView mapView;
private MapboxMap mapboxMap;
@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_circle_layer_clustering);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull MapboxMap map) {
mapboxMap = map;
map.setStyle(Style.LIGHT, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
// Disable any type of fading transition when icons collide on the map. This enhances the visual
// look of the data clustering together and breaking apart.
style.setTransition(new TransitionOptions(0, 0, false));
mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(
12.099, -79.045), 3));
addClusteredGeoJsonSource(style);
style.addImage(
"cross-icon-id",
BitmapUtils.getBitmapFromDrawable(getResources().getDrawable(R.drawable.ic_cross)),
true
);
Toast.makeText(CircleLayerClusteringActivity.this, R.string.zoom_map_in_and_out_instruction,
Toast.LENGTH_SHORT).show();
}
});
}
});
}
private void addClusteredGeoJsonSource(@NonNull Style loadedMapStyle) {
// Add a new source from the GeoJSON data and set the 'cluster' option to true.
try {
loadedMapStyle.addSource(
// Point to GeoJSON data. This example visualizes all M1.0+ earthquakes from
// 12/22/15 to 1/21/16 as logged by USGS' Earthquake hazards program.
new GeoJsonSource("earthquakes",
new URI("https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson"),
new GeoJsonOptions()
.withCluster(true)
.withClusterMaxZoom(14)
.withClusterRadius(50)
)
);
} catch (URISyntaxException uriSyntaxException) {
Timber.e("Check the URL %s", uriSyntaxException.getMessage());
}
//Creating a marker layer for single data points
SymbolLayer unclustered = new SymbolLayer("unclustered-points", "earthquakes");
unclustered.setProperties(
iconImage("cross-icon-id"),
iconSize(
division(
get("mag"), literal(4.0f)
)
),
iconColor(
interpolate(exponential(1), get("mag"),
stop(2.0, rgb(0, 255, 0)),
stop(4.5, rgb(0, 0, 255)),
stop(7.0, rgb(255, 0, 0))
)
)
);
unclustered.setFilter(has("mag"));
loadedMapStyle.addLayer(unclustered);
// Use the earthquakes GeoJSON source to create three layers: One layer for each cluster category.
// Each point range gets a different fill color.
int[][] layers = new int[][] {
new int[] {150, ContextCompat.getColor(this, R.color.mapboxRed)},
new int[] {20, ContextCompat.getColor(this, R.color.mapboxGreen)},
new int[] {0, ContextCompat.getColor(this, R.color.mapbox_blue)}
};
for (int i = 0; i < layers.length; i++) {
//Add clusters' circles
CircleLayer circles = new CircleLayer("cluster-" + i, "earthquakes");
circles.setProperties(
circleColor(layers[i][1]),
circleRadius(18f)
);
Expression pointCount = toNumber(get("point_count"));
// Add a filter to the cluster layer that hides the circles based on "point_count"
circles.setFilter(
i == 0
? all(has("point_count"),
gte(pointCount, literal(layers[i][0]))
) : all(has("point_count"),
gte(pointCount, literal(layers[i][0])),
lt(pointCount, literal(layers[i - 1][0]))
)
);
loadedMapStyle.addLayer(circles);
}
//Add the count labels
SymbolLayer count = new SymbolLayer("count", "earthquakes");
count.setProperties(
textField(Expression.toString(get("point_count"))),
textSize(12f),
textColor(Color.WHITE),
textIgnorePlacement(true),
textAllowOverlap(true)
);
loadedMapStyle.addLayer(count);
}
@Override
public void onStart() {
super.onStart();
mapView.onStart();
}
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public 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);
}
}
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