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package com.mapbox.mapboxsdk.testapp.activity.feature;
import android.graphics.PointF;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import com.google.gson.JsonElement;
import com.mapbox.geojson.Feature;
import com.mapbox.geojson.Point;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.testapp.R;
import timber.log.Timber;
import java.util.List;
import java.util.Map;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField;
/**
* Test activity showcasing using the query rendered features API to query feature properties on Map click.
*/
public class QueryRenderedFeaturesPropertiesActivity extends AppCompatActivity {
private static final String SYMBOL_SOURCE_ID = "symbol-source-id";
private static final String SYMBOL_LAYER_ID = "symbol-source-id";
private MapView mapView;
private MapboxMap mapboxMap;
private GeoJsonSource geoJsonSource;
private SymbolLayer symbolLayer;
private MapboxMap.OnMapClickListener mapClickListener = new MapboxMap.OnMapClickListener() {
@Override
public boolean onMapClick(@NonNull LatLng point) {
final float density = getResources().getDisplayMetrics().density;
final PointF pixel = mapboxMap.getProjection().toScreenLocation(point);
Timber.i(
"Requesting features for %sx%s (%sx%s adjusted for density)",
pixel.x, pixel.y, pixel.x / density, pixel.y / density
);
List<Feature> features = mapboxMap.queryRenderedFeatures(pixel);
// Debug output
debugOutput(features);
geoJsonSource.setGeoJson(Feature.fromGeometry(Point.fromLngLat(point.getLongitude(), point.getLatitude())));
StringBuilder stringBuilder = new StringBuilder();
if (!features.isEmpty()) {
stringBuilder.append(String.format("Found %s features\n", features.size()));
Feature feature = features.get(0);
for (Map.Entry<String, JsonElement> prop : feature.properties().entrySet()) {
stringBuilder.append(String.format("%s: %s\n", prop.getKey(), prop.getValue()));
}
} else {
stringBuilder.append("No features here");
}
symbolLayer.setProperties(textField(stringBuilder.toString()));
return true;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_query_features_point);
// Initialize map as normal
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(mapboxMap -> {
mapboxMap.setStyle(Style.MAPBOX_STREETS, style -> {
QueryRenderedFeaturesPropertiesActivity.this.mapboxMap = mapboxMap;
style.addSource(geoJsonSource = new GeoJsonSource(SYMBOL_SOURCE_ID));
style.addLayer(symbolLayer = new SymbolLayer(SYMBOL_LAYER_ID, SYMBOL_SOURCE_ID));
// Add a click listener
mapboxMap.addOnMapClickListener(mapClickListener);
});
});
}
private void debugOutput(List<Feature> features) {
Timber.i("Got %s features", features.size());
for (Feature feature : features) {
if (feature != null) {
Timber.i("Got feature %s with %s properties and Geometry %s",
feature.id(),
feature.properties() != null ? feature.properties().entrySet().size() : "<null>",
feature.geometry() != null ? feature.geometry().getClass().getSimpleName() : "<null>"
);
if (feature.properties() != null) {
for (Map.Entry<String, JsonElement> entry : feature.properties().entrySet()) {
Timber.i("Prop %s - %s", entry.getKey(), entry.getValue());
}
}
} else {
Timber.i("Got NULL feature");
}
}
}
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mapboxMap != null) {
mapboxMap.removeOnMapClickListener(mapClickListener);
}
mapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
}
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