マップフィーチャーのクエリ
<?xml version="1.0" encoding="utf-8"?><FrameLayoutxmlns: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.query.QueryFeatureActivity"> <com.mapbox.mapboxsdk.maps.MapViewandroid:id="@+id/mapView"android:layout_width="match_parent"android:layout_height="match_parent"mapbox:mapbox_cameraTargetLat="29.7565"mapbox:mapbox_cameraTargetLng="-95.3625"mapbox:mapbox_cameraZoom="16"/> </FrameLayout>
QueryFeatureActivity.java
package com.mapbox.mapboxandroiddemo.examples.query; import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.PointF;import android.os.AsyncTask;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.widget.TextView;import android.widget.Toast; import com.google.gson.JsonElement;import com.mapbox.geojson.Feature;import com.mapbox.geojson.FeatureCollection;import com.mapbox.mapboxandroiddemo.R;import com.mapbox.mapboxsdk.Mapbox;import com.mapbox.mapboxsdk.annotations.BubbleLayout;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.SymbolLayer;import com.mapbox.mapboxsdk.style.sources.GeoJsonSource; import java.lang.ref.WeakReference;import java.util.HashMap;import java.util.List;import java.util.Map; import androidx.annotation.NonNull;import androidx.appcompat.app.AppCompatActivity; import static com.mapbox.mapboxsdk.style.layers.Property.ICON_ANCHOR_BOTTOM;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAnchor;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconIgnorePlacement;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconOffset; /*** Display map property information for a clicked map feature.*/public class QueryFeatureActivity extends AppCompatActivity implements OnMapReadyCallback,MapboxMap.OnMapClickListener { private static final String GEOJSON_SOURCE_ID = "GEOJSON_SOURCE_ID";private static final String MARKER_IMAGE_ID = "MARKER_IMAGE_ID";private static final String CALLOUT_IMAGE_ID = "CALLOUT_IMAGE_ID";private static final String MARKER_LAYER_ID = "MARKER_LAYER_ID";private static final String CALLOUT_LAYER_ID = "CALLOUT_LAYER_ID";private GeoJsonSource source;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)); // This contains the MapView in XML and needs to be called after the access token is configured.setContentView(R.layout.activity_query_feature); mapView = findViewById(R.id.mapView);mapView.onCreate(savedInstanceState);mapView.getMapAsync(this);} @Overridepublic void onMapReady(@NonNull final MapboxMap mapboxMap) {QueryFeatureActivity.this.mapboxMap = mapboxMap;mapboxMap.setStyle(Style.MAPBOX_STREETS, new Style.OnStyleLoaded() {@Overridepublic void onStyleLoaded(@NonNull Style style) {setUpData();mapboxMap.addOnMapClickListener(QueryFeatureActivity.this);Toast.makeText(QueryFeatureActivity.this,getString(R.string.click_on_map_instruction), Toast.LENGTH_SHORT).show();}});} /*** Sets up all of the sources and layers needed for this example*/public void setUpData() {if (mapboxMap != null) {mapboxMap.getStyle(style -> {setupSource(style);setUpClickLocationIconImage(style);setUpClickLocationMarkerLayer(style);setUpInfoWindowLayer(style);});}} /*** Adds the GeoJSON source to the map*/private void setupSource(@NonNull Style loadedStyle) {source = new GeoJsonSource(GEOJSON_SOURCE_ID);loadedStyle.addSource(source);} /*** Adds the marker image to the map for use as a SymbolLayer icon*/private void setUpClickLocationIconImage(@NonNull Style loadedStyle) {loadedStyle.addImage(MARKER_IMAGE_ID, BitmapFactory.decodeResource(this.getResources(), R.drawable.red_marker));} /*** Needed to show the Feature properties info window.*/private void refreshSource(Feature featureAtClickPoint) {if (source != null) {source.setGeoJson(featureAtClickPoint);}} /*** Adds a SymbolLayer to the map to show the click location marker icon.*/private void setUpClickLocationMarkerLayer(@NonNull Style loadedStyle) {loadedStyle.addLayer(new SymbolLayer(MARKER_LAYER_ID, GEOJSON_SOURCE_ID).withProperties(iconImage(MARKER_IMAGE_ID),iconAllowOverlap(true),iconIgnorePlacement(true),iconOffset(new Float[] {0f, -8f})));} /*** Adds a SymbolLayer to the map to show the Feature properties info window.*/private void setUpInfoWindowLayer(@NonNull Style loadedStyle) {loadedStyle.addLayer(new SymbolLayer(CALLOUT_LAYER_ID, GEOJSON_SOURCE_ID).withProperties(// show image with id title based on the value of the name feature propertyiconImage(CALLOUT_IMAGE_ID), // set anchor of icon to bottom-lefticonAnchor(ICON_ANCHOR_BOTTOM), // prevent the feature property window icon from being visible even// if it collides with other previously drawn symbolsiconAllowOverlap(false), // prevent other symbols from being visible even if they collide with the feature property window iconiconIgnorePlacement(false), // offset the info window to be above the markericonOffset(new Float[] {-2f, -28f})));} /*** This method handles click events for SymbolLayer symbols.** @param screenPoint the point on screen clicked*/private boolean handleClickIcon(PointF screenPoint) {List<Feature> features = mapboxMap.queryRenderedFeatures(screenPoint);if (!features.isEmpty()) {Feature feature = features.get(0); StringBuilder stringBuilder = new StringBuilder(); if (feature.properties() != null) {for (Map.Entry<String, JsonElement> entry : feature.properties().entrySet()) {stringBuilder.append(String.format("%s - %s", entry.getKey(), entry.getValue()));stringBuilder.append(System.getProperty("line.separator"));}new GenerateViewIconTask(QueryFeatureActivity.this).execute(FeatureCollection.fromFeature(feature));}} else {Toast.makeText(this, getString(R.string.query_feature_no_properties_found), Toast.LENGTH_SHORT).show();}return true;} @Overridepublic boolean onMapClick(@NonNull LatLng point) {return handleClickIcon(mapboxMap.getProjection().toScreenLocation(point));} /*** Invoked when the bitmap has been generated from a view.*/public void setImageGenResults(HashMap<String, Bitmap> imageMap) {if (mapboxMap != null) {mapboxMap.getStyle(style -> {style.addImages(imageMap);});}} /*** AsyncTask to generate Bitmap from Views to be used as iconImage in a SymbolLayer.* <p>* Call be optionally be called to update the underlying data source after execution.* </p>* <p>* Generating Views on background thread since we are not going to be adding them to the view hierarchy.* </p>*/private static class GenerateViewIconTask extends AsyncTask<FeatureCollection, Void, HashMap<String, Bitmap>> { private final WeakReference<QueryFeatureActivity> activityRef;private Feature featureAtMapClickPoint; GenerateViewIconTask(QueryFeatureActivity activity) {this.activityRef = new WeakReference<>(activity);} @SuppressWarnings("WrongThread")@Overrideprotected HashMap<String, Bitmap> doInBackground(FeatureCollection... params) {QueryFeatureActivity activity = activityRef.get();HashMap<String, Bitmap> imagesMap = new HashMap<>();if (activity != null) {LayoutInflater inflater = LayoutInflater.from(activity); if (params[0].features() != null) {featureAtMapClickPoint = params[0].features().get(0); StringBuilder stringBuilder = new StringBuilder(); BubbleLayout bubbleLayout = (BubbleLayout) inflater.inflate(R.layout.activity_query_feature_window_symbol_layer, null); TextView titleTextView = bubbleLayout.findViewById(R.id.info_window_title);titleTextView.setText(activity.getString(R.string.query_feature_marker_title)); if (featureAtMapClickPoint.properties() != null) {for (Map.Entry<String, JsonElement> entry : featureAtMapClickPoint.properties().entrySet()) {stringBuilder.append(String.format("%s - %s", entry.getKey(), entry.getValue()));stringBuilder.append(System.getProperty("line.separator"));} TextView propertiesListTextView = bubbleLayout.findViewById(R.id.info_window_feature_properties_list);propertiesListTextView.setText(stringBuilder.toString()); int measureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);bubbleLayout.measure(measureSpec, measureSpec); float measuredWidth = bubbleLayout.getMeasuredWidth(); bubbleLayout.setArrowPosition(measuredWidth / 2 - 5); Bitmap bitmap = QueryFeatureActivity.SymbolGenerator.generate(bubbleLayout);imagesMap.put(CALLOUT_IMAGE_ID, bitmap);}}} return imagesMap;} @Overrideprotected void onPostExecute(HashMap<String, Bitmap> bitmapHashMap) {super.onPostExecute(bitmapHashMap);QueryFeatureActivity activity = activityRef.get();if (activity != null && bitmapHashMap != null) {activity.setImageGenResults(bitmapHashMap);activity.refreshSource(featureAtMapClickPoint);}} } /*** Utility class to generate Bitmaps for Symbol.*/private static class SymbolGenerator { /*** Generate a Bitmap from an Android SDK View.** @param view the View to be drawn to a Bitmap* @return the generated bitmap*/static Bitmap generate(@NonNull View view) {int measureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);view.measure(measureSpec, measureSpec); int measuredWidth = view.getMeasuredWidth();int measuredHeight = view.getMeasuredHeight(); view.layout(0, 0, measuredWidth, measuredHeight);Bitmap bitmap = Bitmap.createBitmap(measuredWidth, measuredHeight, Bitmap.Config.ARGB_8888);bitmap.eraseColor(Color.TRANSPARENT);Canvas canvas = new Canvas(bitmap);view.draw(canvas);return bitmap;}} @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();if (mapboxMap != null) {mapboxMap.removeOnMapClickListener(this);}mapView.onDestroy();} @Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);mapView.onSaveInstanceState(outState);}}