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package com.mapbox.mapboxsdk.testapp.activity.style;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.content.res.ResourcesCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import com.mapbox.geojson.Feature;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.style.expressions.Expression;
import com.mapbox.mapboxsdk.style.layers.CircleLayer;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonOptions;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.testapp.R;
import com.mapbox.mapboxsdk.utils.BitmapUtils;
import timber.log.Timber;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import static com.mapbox.mapboxsdk.style.expressions.Expression.all;
import static com.mapbox.mapboxsdk.style.expressions.Expression.division;
import static com.mapbox.mapboxsdk.style.expressions.Expression.exponential;
import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.expressions.Expression.gt;
import static com.mapbox.mapboxsdk.style.expressions.Expression.gte;
import static com.mapbox.mapboxsdk.style.expressions.Expression.has;
import static com.mapbox.mapboxsdk.style.expressions.Expression.interpolate;
import static com.mapbox.mapboxsdk.style.expressions.Expression.literal;
import static com.mapbox.mapboxsdk.style.expressions.Expression.lt;
import static com.mapbox.mapboxsdk.style.expressions.Expression.rgb;
import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;
import static com.mapbox.mapboxsdk.style.expressions.Expression.toNumber;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconColor;
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.iconSize;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textIgnorePlacement;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textSize;
/**
* Test activity showcasing using a geojson source and visualise that source as a cluster by using filters.
*/
public class GeoJsonClusteringActivity extends AppCompatActivity {
private MapView mapView;
private MapboxMap mapboxMap;
private GeoJsonSource source;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_geojson_clustering);
// Initialize map as normal
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(map -> {
mapboxMap = map;
mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(37.7749, 122.4194), 0));
mapboxMap.addImage(
"icon-id",
BitmapUtils.getBitmapFromDrawable(getResources().getDrawable(R.drawable.ic_hearing_black_24dp)),
true
);
// Add a clustered source with some layers
addClusteredGeoJsonSource();
});
}
@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();
mapView.onDestroy();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void addClusteredGeoJsonSource() {
// Add a clustered source
try {
mapboxMap.addSource(source =
new GeoJsonSource("earthquakes",
new URL("https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson"),
new GeoJsonOptions()
.withCluster(true)
.withClusterMaxZoom(14)
.withClusterRadius(50)
)
);
} catch (MalformedURLException malformedUrlException) {
Timber.e(malformedUrlException, "That's not an url... ");
}
// Add unclustered layer
int[][] layers = new int[][] {
new int[] {150, ResourcesCompat.getColor(getResources(), R.color.redAccent, getTheme())},
new int[] {20, ResourcesCompat.getColor(getResources(), R.color.greenAccent, getTheme())},
new int[] {0, ResourcesCompat.getColor(getResources(), R.color.blueAccent, getTheme())}
};
SymbolLayer unclustered = new SymbolLayer("unclustered-points", "earthquakes");
unclustered.setProperties(
iconImage("icon-id"),
iconAllowOverlap(true),
iconIgnorePlacement(true),
iconColor(
interpolate(exponential(1), get("mag"),
stop(2.0, rgb(0, 255, 0)),
stop(4.5, rgb(0, 0, 255)),
stop(7.0, rgb(255, 0, 0))
)
)
);
mapboxMap.addLayer(unclustered);
String[] layerIds = new String[layers.length];
for (int i = 0; i < layers.length; i++) {
// Add some nice circles
layerIds[i] = "cluster-" + i;
CircleLayer circles = new CircleLayer(layerIds[i], "earthquakes");
circles.setProperties(
circleColor(layers[i][1]),
circleRadius(18f)
);
Expression pointCount = toNumber(get("point_count"));
circles.setFilter(
i == 0
? all(has("point_count"),
gte(pointCount, literal(layers[i][0]))
) : all(has("point_count"),
gt(pointCount, literal(layers[i][0])),
lt(pointCount, literal(layers[i - 1][0]))
)
);
mapboxMap.addLayer(circles);
}
// Add the count labels
SymbolLayer count = new SymbolLayer("count", "earthquakes");
count.setProperties(
textField(Expression.toString(get("point_count"))),
textSize(12f),
textColor(Color.WHITE),
textIgnorePlacement(true),
textAllowOverlap(true)
);
mapboxMap.addLayer(count);
mapboxMap.addOnMapClickListener(point -> {
List<Feature> features = mapboxMap.queryRenderedFeatures(mapboxMap.getProjection().toScreenLocation(point), layerIds);
if (!features.isEmpty()) {
moveCameraToClusterExpansion(features.get(0), point);
recursiveLoopClusterFeatures(features);
}
});
// Zoom out to start
mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(1));
}
private void moveCameraToClusterExpansion(Feature feature, LatLng latLng){
if (feature.hasProperty("cluster") && feature.getBooleanProperty("cluster")) {
double newZoom = source.getClusterExpansionZoom((long) feature.getNumberProperty("cluster_id"));
mapboxMap.animateCamera(
CameraUpdateFactory.newLatLngZoom(latLng, newZoom + 0.01), 750
);
}
}
private void recursiveLoopClusterFeatures(List<Feature> features) {
for (Feature feature : features) {
boolean cluster = feature.hasProperty("cluster") && feature.getBooleanProperty("cluster");
if (cluster) {
long pointCount = (long) feature.getNumberProperty("point_count");
long clusterId = (long) feature.getNumberProperty("cluster_id");
double expansionZoom = source.getClusterExpansionZoom(clusterId);
Timber.e("Cluster=%s (id=%s) with %s points, cluster will expand at zoom %s", cluster, clusterId, pointCount, expansionZoom);
recursiveLoopClusterFeatures(source.getLeaves(clusterId, 10, 0));
} else {
Timber.e("Point data: %s", feature.toJson());
}
}
}
}
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