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[android] - update zoom function example with selected state

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This commit is contained in:
Tobrun Van Nuland
2017-09-13 13:11:43 +02:00
committed by Tobrun
parent d1354466f0
commit c795d96bfb
1 changed files with 59 additions and 11 deletions
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70
platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/ZoomFunctionSymbolLayerActivity.java
View File

@@ -1,35 +1,46 @@
package com.mapbox.mapboxsdk.testapp.activity.style;
import android.graphics.PointF;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import com.google.gson.JsonObject;
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.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.testapp.R;
import com.mapbox.services.commons.geojson.Feature;
import com.mapbox.services.commons.geojson.FeatureCollection;
import com.mapbox.services.commons.geojson.Point;
import com.mapbox.services.commons.models.Position;
import java.net.MalformedURLException;
import java.net.URL;
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;
/**
* 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 SOURCE_URL = "https://gist.githubusercontent.com/anonymous/"
+ "70ddad0e58520307cd1699e704f4b626/raw/a5deaccdc4517c12d63b1f8abcb7becf5e36506a/map.geojson";
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;
@@ -48,19 +59,30 @@ public class ZoomFunctionSymbolLayerActivity extends AppCompatActivity {
@Override
public void onMapReady(@NonNull final MapboxMap map) {
mapboxMap = map;
addSource();
updateSource(false);
addLayer();
addMapClickListener();
}
});
}
private void addSource() {
try {
source = new GeoJsonSource(SOURCE_ID, new URL(SOURCE_URL));
} catch (MalformedURLException exception) {
Timber.e(exception, "That's not an url... ");
private void updateSource(boolean selected) {
FeatureCollection featureCollection = createFeatureCollection(selected);
if (source != null) {
source.setGeoJson(featureCollection);
} else {
source = new GeoJsonSource(SOURCE_ID, featureCollection);
mapboxMap.addSource(source);
}
mapboxMap.addSource(source);
}
private FeatureCollection createFeatureCollection(boolean selected) {
Point point = Point.fromCoordinates(Position.fromCoordinates(-74.016181, 40.701745));
Feature feature = Feature.fromGeometry(point);
JsonObject properties = new JsonObject();
properties.addProperty(KEY_PROPERTY_SELECTED, selected);
feature.setProperties(properties);
return FeatureCollection.fromFeatures(new Feature[] {feature});
}
private void addLayer() {
@@ -74,11 +96,37 @@ public class ZoomFunctionSymbolLayerActivity extends AppCompatActivity {
)
)
),
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(new MapboxMap.OnMapClickListener() {
@Override
public void onMapClick(@NonNull LatLng point) {
PointF screenPoint = mapboxMap.getProjection().toScreenLocation(point);
List<Feature> featureList = mapboxMap.queryRenderedFeatures(screenPoint, LAYER_ID);
if (!featureList.isEmpty()) {
Feature feature = featureList.get(0);
boolean isSelected = feature.getBooleanProperty(KEY_PROPERTY_SELECTED);
updateSource(!isSelected);
} else {
Timber.e("No features found");
}
}
});
}
@Override
protected void onStart() {
super.onStart();