ベクターデータに基づく3D建物の高さを表示
<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"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="com.mapbox.mapboxandroiddemo.examples.extrusions.PopulationDensityExtrusionActivity"> <com.mapbox.mapboxsdk.maps.MapViewandroid:id="@+id/mapView"android:layout_width="match_parent"android:layout_height="match_parent"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintHorizontal_bias="0.0"app:layout_constraintLeft_toLeftOf="parent"app:layout_constraintRight_toRightOf="parent"app:layout_constraintTop_toTopOf="parent"app:layout_constraintVertical_bias="0.0"mapbox:mapbox_cameraTargetLat="37.784282779035216"mapbox:mapbox_cameraTargetLng="-122.4232292175293"mapbox:mapbox_cameraZoom="12"mapbox:mapbox_cameraZoomMax="16"mapbox:mapbox_cameraZoomMin="12"mapbox:mapbox_cameraTilt="45"></com.mapbox.mapboxsdk.maps.MapView> <androidx.constraintlayout.widget.Guidelineandroid:id="@+id/guideline4"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="vertical"app:layout_constraintGuide_begin="20dp"/> <androidx.constraintlayout.widget.Guidelineandroid:id="@+id/guideline5"android:layout_width="wrap_content"android:layout_height="wrap_content"android:orientation="vertical"app:layout_constraintGuide_begin="20dp"/> </androidx.constraintlayout.widget.ConstraintLayout>
PopulationDensityExtrusionActivity.java
package com.mapbox.mapboxandroiddemo.examples.extrusions; import android.os.Bundle;import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import android.view.Menu;import android.view.MenuItem; import com.mapbox.mapboxandroiddemo.R;import com.mapbox.mapboxsdk.Mapbox;import com.mapbox.mapboxsdk.camera.CameraPosition;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.layers.FillExtrusionLayer;import com.mapbox.mapboxsdk.style.layers.FillLayer;import com.mapbox.mapboxsdk.style.sources.VectorSource; import static com.mapbox.mapboxsdk.style.expressions.Expression.all;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.gt;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.layers.PropertyFactory.fillColor;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionBase;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionColor;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionHeight; /*** Use imported vector data to set the height of 3D building extrusions*/public class PopulationDensityExtrusionActivity extends AppCompatActivity implements OnMapReadyCallback { private MapView mapView;private MapboxMap mapboxMap; @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));setContentView(R.layout.activity_population_density_extrusion);mapView = findViewById(R.id.mapView);mapView.onCreate(savedInstanceState);mapView.getMapAsync(this);} @Overridepublic void onMapReady(@NonNull final MapboxMap mapboxMap) {this.mapboxMap = mapboxMap;mapboxMap.setStyle(Style.DARK, new Style.OnStyleLoaded() {@Overridepublic void onStyleLoaded(@NonNull Style style) {style.addSource(new VectorSource("population", "mapbox://peterqliu.d0vin3el"));addFillsLayer(style);addExtrusionsLayer(style);}});} private void addFillsLayer(@NonNull Style loadedMapStyle) {FillLayer fillsLayer = new FillLayer("fills", "population");fillsLayer.setSourceLayer("outgeojson");fillsLayer.setFilter(all(lt(get("pkm2"), literal(300000))));fillsLayer.withProperties(fillColor(interpolate(exponential(1f), get("pkm2"),stop(0, rgb(22, 14, 35)),stop(14500, rgb(0, 97, 127)),stop(145000, rgb(85, 223, 255)))));loadedMapStyle.addLayerBelow(fillsLayer, "water");} private void addExtrusionsLayer(@NonNull Style loadedMapStyle) {FillExtrusionLayer fillExtrusionLayer = new FillExtrusionLayer("extrusions", "population");fillExtrusionLayer.setSourceLayer("outgeojson");fillExtrusionLayer.setFilter(all(gt(get("p"), 1), lt(get("pkm2"), 300000)));fillExtrusionLayer.withProperties(fillExtrusionColor(interpolate(exponential(1f), get("pkm2"),stop(0, rgb(22, 14, 35)),stop(14500, rgb(0, 97, 127)),stop(145000, rgb(85, 233, 255)))),fillExtrusionBase(0f),fillExtrusionHeight(interpolate(exponential(1f), get("pkm2"),stop(0, 0f),stop(1450000, 20000f))));loadedMapStyle.addLayerBelow(fillExtrusionLayer, "airport-label");} @Overrideprotected void onStart() {super.onStart();mapView.onStart();} @Overrideprotected void onResume() {super.onResume();mapView.onResume();} @Overrideprotected void onPause() {super.onPause();mapView.onPause();} @Overrideprotected void onStop() {super.onStop();mapView.onStop();} @Overridepublic void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);mapView.onSaveInstanceState(outState);} @Overridepublic void onLowMemory() {super.onLowMemory();mapView.onLowMemory();} @Overridepublic void onDestroy() {super.onDestroy();mapView.onDestroy();} @Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.menu_population_density_spinner_menu_cities, menu);return true;} @Overridepublic boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) {case R.id.san_francisco:goToNewLocation(37.784282779035216, -122.4232292175293);return true;case R.id.los_angeles:goToNewLocation(34.04412546508576, -118.28636169433594);return true;case R.id.seattle:goToNewLocation(47.60651025683697, -122.33327865600585);return true;case R.id.new_orleans:goToNewLocation(29.946159058399612, -90.10042190551758);return true;case R.id.chicago:goToNewLocation(41.87531293759582, -87.6240348815918);return true;case R.id.philadelphia:goToNewLocation(39.95370120254379, -75.1626205444336);return true;case R.id.new_york:goToNewLocation(40.72228267283148, -73.99772644042969);return true;case R.id.atlanta:goToNewLocation(33.74910736130734, -84.39079284667969);return true;case R.id.portland:goToNewLocation(45.522104713562825, -122.67179489135742);return true;case R.id.denver:goToNewLocation(39.74428621972816, -104.99565124511719);return true;case R.id.minneapolis:goToNewLocation(44.969656023708175, -93.26637268066406);return true;case R.id.miami:goToNewLocation(25.773846629676616, -80.19624710083008);return true;case android.R.id.home:finish();return true;default:return super.onOptionsItemSelected(item);}} private void goToNewLocation(double lat, double longitude) {LatLng newPosition = new LatLng();newPosition.setLatitude(lat);newPosition.setLongitude(longitude);CameraPosition position = new CameraPosition.Builder().target(newPosition).build();mapboxMap.moveCamera(CameraUpdateFactory.newCameraPosition(position));}}