Examples
Dynamic styling (32)

Animate marker position

package com.mapbox.mapboxandroiddemo.examples.labs;
import android.animation.ObjectAnimator;
import android.animation.TypeEvaluator;
import android.animation.ValueAnimator;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;
import com.mapbox.geojson.Feature;
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;
/**
* Animate the marker to a new position on the map.
*/
public class AnimatedMarkerActivity extends AppCompatActivity implements OnMapReadyCallback,
MapboxMap.OnMapClickListener {
private MapView mapView;
private MapboxMap mapboxMap;
private LatLng currentPosition = new LatLng(64.900932, -18.167040);
private GeoJsonSource geoJsonSource;
private ValueAnimator animator;
@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_annotation_animated_marker);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
this.mapboxMap = mapboxMap;
geoJsonSource = new GeoJsonSource("source-id",
Feature.fromGeometry(Point.fromLngLat(currentPosition.getLongitude(),
currentPosition.getLatitude())));
mapboxMap.setStyle(Style.SATELLITE_STREETS, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
style.addImage(("marker_icon"), BitmapFactory.decodeResource(
getResources(), R.drawable.red_marker));
style.addSource(geoJsonSource);
style.addLayer(new SymbolLayer("layer-id", "source-id")
.withProperties(
PropertyFactory.iconImage("marker_icon"),
PropertyFactory.iconIgnorePlacement(true),
PropertyFactory.iconAllowOverlap(true)
));
Toast.makeText(
AnimatedMarkerActivity.this,
getString(R.string.tap_on_map_instruction),
Toast.LENGTH_LONG
).show();
mapboxMap.addOnMapClickListener(AnimatedMarkerActivity.this);
}
});
}
@Override
public boolean onMapClick(@NonNull LatLng point) {
// When the user clicks on the map, we want to animate the marker to that
// location.
if (animator != null && animator.isStarted()) {
currentPosition = (LatLng) animator.getAnimatedValue();
animator.cancel();
}
animator = ObjectAnimator
.ofObject(latLngEvaluator, currentPosition, point)
.setDuration(2000);
animator.addUpdateListener(animatorUpdateListener);
animator.start();
currentPosition = point;
return true;
}
private final ValueAnimator.AnimatorUpdateListener animatorUpdateListener =
new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
LatLng animatedPosition = (LatLng) valueAnimator.getAnimatedValue();
geoJsonSource.setGeoJson(Point.fromLngLat(animatedPosition.getLongitude(), animatedPosition.getLatitude()));
}
};
// Class is used to interpolate the marker animation.
private static final TypeEvaluator<LatLng> latLngEvaluator = new TypeEvaluator<LatLng>() {
private final LatLng latLng = new LatLng();
@Override
public LatLng evaluate(float fraction, LatLng startValue, LatLng endValue) {
latLng.setLatitude(startValue.getLatitude()
+ ((endValue.getLatitude() - startValue.getLatitude()) * fraction));
latLng.setLongitude(startValue.getLongitude()
+ ((endValue.getLongitude() - startValue.getLongitude()) * fraction));
return latLng;
}
};
@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 (animator != null) {
animator.cancel();
}
if (mapboxMap != null) {
mapboxMap.removeOnMapClickListener(this);
}
mapView.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}
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