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package com.mapbox.mapboxsdk.testapp.activity.style;
import android.graphics.PointF;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import com.google.gson.JsonObject;
import com.mapbox.geojson.Feature;
import com.mapbox.geojson.FeatureCollection;
import com.mapbox.geojson.Point;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.style.layers.Property;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.testapp.R;
import java.util.List;
import timber.log.Timber;
import static com.mapbox.mapboxsdk.style.functions.Function.property;
import static com.mapbox.mapboxsdk.style.functions.Function.zoom;
import static com.mapbox.mapboxsdk.style.functions.stops.Stop.stop;
import static com.mapbox.mapboxsdk.style.functions.stops.Stops.categorical;
import static com.mapbox.mapboxsdk.style.functions.stops.Stops.interval;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconSize;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.visibility;
/**
* Test activity showcasing changing the icon with a zoom function and adding selection state to a SymbolLayer.
*/
public class ZoomFunctionSymbolLayerActivity extends AppCompatActivity {
private static final String LAYER_ID = "symbolLayer";
private static final String SOURCE_ID = "poiSource";
private static final String BUS_MAKI_ICON_ID = "bus-11";
private static final String CAFE_MAKI_ICON_ID = "cafe-11";
private static final String KEY_PROPERTY_SELECTED = "selected";
private static final float ZOOM_STOP_MIN_VALUE = 7.0f;
private static final float ZOOM_STOP_MAX_VALUE = 12.0f;
private MapView mapView;
private MapboxMap mapboxMap;
private GeoJsonSource source;
private SymbolLayer layer;
private boolean isInitialPosition = true;
private boolean isSelected = false;
private boolean isShowingSymbolLayer = true;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zoom_symbol_layer);
mapView = (MapView) findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(map -> {
mapboxMap = map;
updateSource();
addLayer();
addMapClickListener();
});
}
private void updateSource() {
FeatureCollection featureCollection = createFeatureCollection();
if (source != null) {
source.setGeoJson(featureCollection);
} else {
source = new GeoJsonSource(SOURCE_ID, featureCollection);
mapboxMap.addSource(source);
}
}
private void toggleSymbolLayerVisibility() {
layer.setProperties(
visibility(isShowingSymbolLayer ? Property.NONE : Property.VISIBLE)
);
isShowingSymbolLayer = !isShowingSymbolLayer;
}
private FeatureCollection createFeatureCollection() {
Point point = isInitialPosition
? Point.fromLngLat(-74.01618140, 40.701745)
: Point.fromLngLat(-73.988097, 40.749864);
JsonObject properties = new JsonObject();
properties.addProperty(KEY_PROPERTY_SELECTED, isSelected);
Feature feature = Feature.fromGeometry(point, properties);
return FeatureCollection.fromFeatures(new Feature[] {feature});
}
private void addLayer() {
layer = new SymbolLayer(LAYER_ID, SOURCE_ID);
layer.setProperties(
iconImage(
zoom(
interval(
stop(ZOOM_STOP_MIN_VALUE, iconImage(BUS_MAKI_ICON_ID)),
stop(ZOOM_STOP_MAX_VALUE, iconImage(CAFE_MAKI_ICON_ID))
)
)
),
iconSize(
property(
KEY_PROPERTY_SELECTED,
categorical(
stop(true, iconSize(3.0f)),
stop(false, iconSize(1.0f))
)
)
),
iconAllowOverlap(true)
);
mapboxMap.addLayer(layer);
}
private void addMapClickListener() {
mapboxMap.setOnMapClickListener(point -> {
PointF screenPoint = mapboxMap.getProjection().toScreenLocation(point);
List<Feature> featureList = mapboxMap.queryRenderedFeatures(screenPoint, LAYER_ID);
if (!featureList.isEmpty()) {
Feature feature = featureList.get(0);
boolean selectedNow = feature.getBooleanProperty(KEY_PROPERTY_SELECTED);
isSelected = !selectedNow;
updateSource();
} else {
Timber.e("No features found");
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_symbols, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mapboxMap != null) {
if (item.getItemId() == R.id.menu_action_change_location) {
isInitialPosition = !isInitialPosition;
updateSource();
} else if (item.getItemId() == R.id.menu_action_toggle_source) {
toggleSymbolLayerVisibility();
}
}
return super.onOptionsItemSelected(item);
}
@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
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
}
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