Getting started (3)Create a simple map viewDynamically build a map viewSupport map fragmentData visualization (33)Styling heatmapsBaseball spray chartBiometric fingerprintDisplay water depthCalendar integrationCircleLayer clustersCircle icon toggleCircle radiusCircle to icon transitionCreate hotspots from pointsCreate a line layerData time lapseShow heatmap dataDraw a GeoJSON lineDraw a polygonJoin local JSON data with vector tile geometriesLine gradientDraw multiple geometriesLine behind moving iconMultiple expressionsIcon setting based on Feature propertyOutlined polygon holeSatellite 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 levelDraw a polygon with holesDynamic styling (30)Add a new layer below labelsAdd a WMS sourceHillshadingShow time lapseAdd a vector tile 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 MapMarker following routeSymbol layer iconsStyle with missing iconPicture in picturePulsing layer opacityText anchor positionButton interaction stylingOpacity fadeShow and hide layersSymbolLayer iconsAdjust text labelsTransparent render surfaceMultiple text formatsUse an image sourceAnimated icon movementVariable label placementUser interaction (12)Click on single layerFeature countDrawing search areaSymbol layer icon size changeHighlighted lineInset mapBackground fogLocation pickerRecyclerView DirectionsRecyclerView interactionSearch again in an areaSnaking directionsDevice location (7)Track device locationLocation camera optionsBasic pulsing locationCustom pulsing locationCustomized location iconShow a user's location on a map fragmentShow a user's locationCamera (5)Animate the map cameraFit camera in bounding boxRestrict map panningRotating cameraZoom to show a cluster's leavesExtrusions (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 heightMap style (4)Style attributionLocal style or custom raster styleMapbox Studio styleDefault stylesOffline (3)Cache managementA simple offline mapOffline managerQuerying the map (3)Building outlineQuery a map featureSelect a buildingImage generation (2)Snapshot NotificationShare snapshot image

Variable label placement

activity_style_variable_text_placement
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:mapbox_cameraTargetLat="38.907"
mapbox:mapbox_cameraTargetLng="-77.04"
mapbox:mapbox_cameraZoom="11.15"/>
</FrameLayout>
VariableLabelPlacementActivity.java
package com.mapbox.mapboxandroiddemo.examples.styles;
import android.graphics.Color;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import timber.log.Timber;
import android.widget.Toast;
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.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import java.net.URI;
import java.net.URISyntaxException;
import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.layers.Property.TEXT_ANCHOR_BOTTOM;
import static com.mapbox.mapboxsdk.style.layers.Property.TEXT_ANCHOR_LEFT;
import static com.mapbox.mapboxsdk.style.layers.Property.TEXT_ANCHOR_RIGHT;
import static com.mapbox.mapboxsdk.style.layers.Property.TEXT_ANCHOR_TOP;
import static com.mapbox.mapboxsdk.style.layers.Property.TEXT_JUSTIFY_AUTO;
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.textJustify;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textRadialOffset;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textSize;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textVariableAnchor;
/**
* To increase the chance of high-priority labels staying visible, provide the map
* renderer a list of preferred text anchor positions via
* {@link com.mapbox.mapboxsdk.style.layers.PropertyFactory#textVariableAnchor(String[])}.
*/
public class VariableLabelPlacementActivity extends AppCompatActivity {
private static final String GEOJSON_SRC_ID = "poi_source_id";
private static final String POI_LABELS_LAYER_ID = "poi_labels_layer_id";
private MapView mapView;
private GeoJsonSource geoJsonSource;
@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_style_variable_text_placement);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
try {
geoJsonSource = new GeoJsonSource(GEOJSON_SRC_ID, new URI("asset://poi_places.geojson"));
mapboxMap.setStyle(new Style.Builder().fromUri(Style.LIGHT)
.withSource(geoJsonSource)
// Adds a SymbolLayer to display POI labels
.withLayer(new SymbolLayer(POI_LABELS_LAYER_ID, GEOJSON_SRC_ID)
.withProperties(
textField(get("description")),
textSize(17f),
textColor(Color.RED),
textVariableAnchor(
new String[]{TEXT_ANCHOR_TOP, TEXT_ANCHOR_BOTTOM, TEXT_ANCHOR_LEFT, TEXT_ANCHOR_RIGHT}),
textJustify(TEXT_JUSTIFY_AUTO),
textRadialOffset(0.5f))),
new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull final Style style) {
Toast.makeText(VariableLabelPlacementActivity.this,
getString(R.string.zoom_map_in_and_out_variable_label_instruction),
Toast.LENGTH_SHORT).show();
}
});
} catch (URISyntaxException exception) {
Timber.d(exception);
}
}
});
}
// 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);
}
}
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