Examples
Dynamic styling (32)

Symbol layer icon size change

package com.mapbox.mapboxandroiddemo.examples.styles;
import android.animation.ValueAnimator;
import android.graphics.BitmapFactory;
import android.graphics.PointF;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import com.mapbox.geojson.Feature;
import com.mapbox.geojson.FeatureCollection;
import com.mapbox.geojson.Point;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
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.PropertyFactory;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import java.util.ArrayList;
import java.util.List;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconOffset;
/**
* Use a SymbolLayer to display icons and then change an icon's size when tapped on.
*/
public class IconSizeChangeOnClickActivity extends AppCompatActivity implements
OnMapReadyCallback, MapboxMap.OnMapClickListener {
private ValueAnimator markerAnimator;
private MapView mapView;
private MapboxMap mapboxMap;
private boolean markerSelected = false;
@Override
protected 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_style_symbol_icon_size_change_on_click);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
this.mapboxMap = mapboxMap;
mapboxMap.setStyle(Style.DARK, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
List<Feature> markerCoordinates = new ArrayList<>();
markerCoordinates.add(Feature.fromGeometry(
Point.fromLngLat(-71.065634, 42.354950))); // Boston Common Park
markerCoordinates.add(Feature.fromGeometry(
Point.fromLngLat(-71.097293, 42.346645))); // Fenway Park
markerCoordinates.add(Feature.fromGeometry(
Point.fromLngLat(-71.053694, 42.363725))); // The Paul Revere House
style.addSource(new GeoJsonSource("marker-source",
FeatureCollection.fromFeatures(markerCoordinates)));
// Add the marker image to map
style.addImage("my-marker-image", BitmapFactory.decodeResource(
IconSizeChangeOnClickActivity.this.getResources(), R.drawable.blue_marker_view));
// Adding an offset so that the bottom of the blue icon gets fixed to the coordinate, rather than the
// middle of the icon being fixed to the coordinate point.
style.addLayer(new SymbolLayer("marker-layer", "marker-source")
.withProperties(PropertyFactory.iconImage("my-marker-image"),
iconAllowOverlap(true),
iconOffset(new Float[]{0f, -9f})));
// Add the selected marker source and layer
style.addSource(new GeoJsonSource("selected-marker"));
// Adding an offset so that the bottom of the blue icon gets fixed to the coordinate, rather than the
// middle of the icon being fixed to the coordinate point.
style.addLayer(new SymbolLayer("selected-marker-layer", "selected-marker")
.withProperties(PropertyFactory.iconImage("my-marker-image"),
iconAllowOverlap(true),
iconOffset(new Float[]{0f, -9f})));
mapboxMap.addOnMapClickListener(IconSizeChangeOnClickActivity.this);
}
});
}
@Override
public boolean onMapClick(@NonNull LatLng point) {
Style style = mapboxMap.getStyle();
if (style != null) {
final SymbolLayer selectedMarkerSymbolLayer =
(SymbolLayer) style.getLayer("selected-marker-layer");
final PointF pixel = mapboxMap.getProjection().toScreenLocation(point);
List<Feature> features = mapboxMap.queryRenderedFeatures(pixel, "marker-layer");
List<Feature> selectedFeature = mapboxMap.queryRenderedFeatures(
pixel, "selected-marker-layer");
if (selectedFeature.size() > 0 && markerSelected) {
return false;
}
if (features.isEmpty()) {
if (markerSelected) {
deselectMarker(selectedMarkerSymbolLayer);
}
return false;
}
GeoJsonSource source = style.getSourceAs("selected-marker");
if (source != null) {
source.setGeoJson(FeatureCollection.fromFeatures(
new Feature[]{Feature.fromGeometry(features.get(0).geometry())}));
}
if (markerSelected) {
deselectMarker(selectedMarkerSymbolLayer);
}
if (features.size() > 0) {
selectMarker(selectedMarkerSymbolLayer);
}
}
return true;
}
private void selectMarker(final SymbolLayer iconLayer) {
markerAnimator = new ValueAnimator();
markerAnimator.setObjectValues(1f, 2f);
markerAnimator.setDuration(300);
markerAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animator) {
iconLayer.setProperties(
PropertyFactory.iconSize((float) animator.getAnimatedValue())
);
}
});
markerAnimator.start();
markerSelected = true;
}
private void deselectMarker(final SymbolLayer iconLayer) {
markerAnimator.setObjectValues(2f, 1f);
markerAnimator.setDuration(300);
markerAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animator) {
iconLayer.setProperties(
PropertyFactory.iconSize((float) animator.getAnimatedValue())
);
}
});
markerAnimator.start();
markerSelected = false;
}
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mapboxMap != null) {
mapboxMap.removeOnMapClickListener(this);
}
if (markerAnimator != null) {
markerAnimator.cancel();
}
mapView.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}
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