可変ラベルの配置
<?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.MapViewandroid: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; @Overrideprotected 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() {@Overridepublic 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() {@Overridepublic 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@Overridepublic void onResume() {super.onResume();mapView.onResume();} @Overrideprotected void onStart() {super.onStart();mapView.onStart();} @Overrideprotected void onStop() {super.onStop();mapView.onStop();} @Overridepublic void onPause() {super.onPause();mapView.onPause();} @Overridepublic void onLowMemory() {super.onLowMemory();mapView.onLowMemory();} @Overrideprotected void onDestroy() {super.onDestroy();mapView.onDestroy();} @Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);mapView.onSaveInstanceState(outState);}}