Examples
Getting started (3)Create a simple map viewDynamically build a map viewSupport map fragmentDynamic styling (30)HillshadingAdd a vector tile sourceAdd a new layer below labelsAdd a WMS sourceShow time lapseAnimate 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 MapMarker following routeSymbol layer iconsStyle with missing iconPicture in picturePulsing layer opacityText anchor positionButton interaction stylingOpacity fadeShow and hide layersAdjust text labelsSymbolLayer iconsMultiple text formatsTransparent render surfaceUse an image sourceAnimated icon movementVariable label placementAdjust a layer's opacityData visualization (33)Styling heatmapsDisplay water depthBaseball spray chartBiometric fingerprintCalendar integrationCircleLayer clustersCircle icon toggleCircle radiusCircle to icon transitionCreate a line layerCreate hotspots from pointsData time lapseShow heatmap dataDraw a GeoJSON lineDraw a polygon with holesDraw a polygonDraw multiple geometriesLine gradientJoin local JSON data with vector tile geometriesLine behind moving iconMultiple expressionsIcon setting based on Feature propertySatellite land selectShared preferencesSpinning iconStyle circles categoricallyStyle lines using an identity property functionToggle collision detectionSymbolLayer clusteringSymbol layer info windowZoom-based icon switchUpdate a choropleth layer by zoom levelOutlined polygon holeCamera (5)Animate the map cameraFit camera in bounding boxRestrict map panningRotating cameraZoom to show a cluster's leavesQuerying the map (3)Building outlineQuery a map featureSelect a buildingOffline (3)Cache managementA simple offline mapOffline managerMap style (4)Style attributionLocal style or custom raster styleMapbox Studio styleDefault stylesUser interaction (12)Click on single layerFeature countDrawing search areaHighlighted lineSymbol layer icon size changeInset mapLocation pickerBackground fogRecyclerView DirectionsRecyclerView interactionSearch again in an areaSnaking directionsExtrusions (5)Display 3D building height based on vector dataExtrude polygons for 3D indoor mappingRotate and tilt with 3D buildingsUse GeoJSON data to set extrusion heightAdjust light location and colorImage generation (2)Snapshot NotificationShare snapshot imageDevice location (5)Track device locationLocation camera optionsCustomized location iconShow a user's location on a map fragmentShow a user's location

Circle radius

activity_circle_radius_activity
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.mapbox.mapboxandroiddemo.examples.dds.CircleRadiusActivity">
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="0dp"
android:layout_height="0dp"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintEnd_toEndOf="parent"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toTopOf="parent"
mapbox:mapbox_cameraTargetLat="38.9098"
mapbox:mapbox_cameraTargetLng="-77.0295"
mapbox:mapbox_cameraZoom="15" />
</androidx.constraintlayout.widget.ConstraintLayout>
CircleRadiusActivity.java
package com.mapbox.mapboxandroiddemo.examples.dds;
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.CircleLayer;
import com.mapbox.mapboxsdk.style.sources.VectorSource;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
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.interpolate;
import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleOpacity;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;
/**
* Set the radii of a CircleLayer's circles based on a data property.
*/
public class CircleRadiusActivity extends AppCompatActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Mapbox.getInstance(this, getString(R.string.access_token));
setContentView(R.layout.activity_circle_radius_activity);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
mapboxMap.setStyle(Style.DARK, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
// replace examples.8mj5l1r9 with the map ID for the tileset
// you created by uploading data to your Mapbox account
style.addSource(new VectorSource("trees-source", "mapbox://examples.8mj5l1r9"));
CircleLayer circleLayer = new CircleLayer("trees-style", "trees-source");
// replace street-trees-DC-9gvg5l with the name of your source layer
circleLayer.setSourceLayer("street-trees-DC-9gvg5l");
circleLayer.withProperties(
circleOpacity(0.6f),
circleColor(Color.parseColor("#ffffff")),
circleRadius(
interpolate(exponential(1.0f), get("DBH"),
stop(0, 0f),
stop(1, 1f),
stop(110, 11f)
)
)
);
style.addLayer(circleLayer);
}
});
}
});
}
// Add the mapView's own lifecycle methods to the activity's lifecycle methods
@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);
}
}
Was this page helpful?