水深の表示
<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout 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="44.934448"mapbox:mapbox_cameraTargetLng="-85.671378"mapbox:mapbox_cameraZoom="15.69"mapbox:mapbox_cameraZoomMin="14.9" /> </androidx.constraintlayout.widget.ConstraintLayout>
BathymetryActivity.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.geometry.LatLng;import com.mapbox.mapboxsdk.geometry.LatLngBounds;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.FillLayer;import com.mapbox.mapboxsdk.style.layers.SymbolLayer;import com.mapbox.mapboxsdk.style.sources.GeoJsonSource; import java.net.URI;import java.net.URISyntaxException; import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity;import timber.log.Timber; import static com.mapbox.mapboxsdk.style.expressions.Expression.eq;import static com.mapbox.mapboxsdk.style.expressions.Expression.geometryType;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.linear;import static com.mapbox.mapboxsdk.style.expressions.Expression.literal;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.fillOpacity;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textAllowOverlap;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.textSize; public class BathymetryActivity extends AppCompatActivity implements OnMapReadyCallback { private static final String GEOJSON_SOURCE_ID = "GEOJSON_SOURCE_ID";private static final LatLngBounds LAKE_BOUNDS = new LatLngBounds.Builder().include(new LatLng(44.936236, -85.673450)).include(new LatLng(44.932955, -85.669272)).build();private MapView mapView; @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_bathymetry); mapView = findViewById(R.id.mapView);mapView.onCreate(savedInstanceState);mapView.getMapAsync(this);} @Overridepublic void onMapReady(@NonNull final MapboxMap mapboxMap) { mapboxMap.setStyle(Style.OUTDOORS, new Style.OnStyleLoaded() {@Overridepublic void onStyleLoaded(@NonNull Style style) {// Set bounds to Lawrence Lake, MichiganmapboxMap.setLatLngBoundsForCameraTarget(LAKE_BOUNDS); // Remove lake label layerstyle.removeLayer("water-label"); try {// Retrieve GeoJSON from local file and add it to the map's stylestyle.addSource(new GeoJsonSource(GEOJSON_SOURCE_ID, new URI("asset://bathymetry-data.geojson")));} catch (URISyntaxException exception) {Timber.d(exception);} setUpDepthFillLayers(style);setUpDepthNumberSymbolLayer(style);}});} /*** Adds a FillLayer and uses data-driven styling to display the lake's areas*/private void setUpDepthFillLayers(@NonNull Style loadedMapStyle) {FillLayer depthPolygonFillLayer = new FillLayer("DEPTH_POLYGON_FILL_LAYER_ID", GEOJSON_SOURCE_ID);depthPolygonFillLayer.withProperties(fillColor(interpolate(linear(),get("depth"),stop(5, rgb(16, 158, 210)),stop(10, rgb(37, 116, 145)),stop(15, rgb(69, 102, 124)),stop(30, rgb(31, 52, 67)))),fillOpacity(.7f));// Only display Polygon Features in this layerdepthPolygonFillLayer.setFilter(eq(geometryType(), literal("Polygon")));loadedMapStyle.addLayer(depthPolygonFillLayer);} /*** Adds a SymbolLayer to display the depth of the lake's areas*/private void setUpDepthNumberSymbolLayer(@NonNull Style loadedMapStyle) {SymbolLayer depthNumberSymbolLayer = new SymbolLayer("DEPTH_NUMBER_SYMBOL_LAYER_ID",GEOJSON_SOURCE_ID);depthNumberSymbolLayer.withProperties(textField("{depth}"),textSize(17f),textColor(Color.WHITE),textAllowOverlap(true));// Only display Point Features in this layerdepthNumberSymbolLayer.setFilter(eq(geometryType(), literal("Point")));loadedMapStyle.addLayerAbove(depthNumberSymbolLayer, "DEPTH_POLYGON_FILL_LAYER_ID");} // 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);}}