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activity_dds_style_circles_categorically

<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".examples.basics.SimpleMapViewActivity">
 
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:mapbox_cameraTargetLat="37.753574"
mapbox:mapbox_cameraTargetLng="-122.447303"
mapbox:mapbox_cameraZoom="12" />
 
</FrameLayout>

StyleCirclesCategoricallyActivity.java

Java

Kotlin

package com.mapbox.mapboxandroiddemo.examples.dds;
 
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
 
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 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.match;
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.zoom;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;
 
/**
* Use data-driven styling to set circles' colors based on imported vector data.
*/
public class StyleCirclesCategoricallyActivity 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_dds_style_circles_categorically);
 
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 Style style) {
style.addSource(new VectorSource(
"ethnicity-source",
"http://api.mapbox.com/v4/examples.8fgz4egr.json?access_token=" + Mapbox.getAccessToken()
));
 
CircleLayer circleLayer = new CircleLayer("population", "ethnicity-source");
circleLayer.setSourceLayer("sf2010");
circleLayer.withProperties(
circleRadius(
interpolate(
exponential(1.75f),
zoom(),
stop(12, 2f),
stop(22, 180f)
)),
circleColor(
match(get("ethnicity"), rgb(0, 0, 0),
stop("white", rgb(251, 176, 59)),
stop("Black", rgb(34, 59, 83)),
stop("Hispanic", rgb(229, 94, 94)),
stop("Asian", rgb(59, 178, 208)),
stop("Other", rgb(204, 204, 204)))));
 
style.addLayer(circleLayer);
}
});
}
});
}
 
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
 
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
 
@Override
public 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);
}
}