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Drawn line behind moving SymbolLayer icon (#998)
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Langston Smith
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Jun 20, 2019
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304 changes: 304 additions & 0 deletions
304
...n/java/com/mapbox/mapboxandroiddemo/examples/labs/MovingIconWithTrailingLineActivity.java
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package com.mapbox.mapboxandroiddemo.examples.labs; | ||
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import android.animation.Animator; | ||
import android.animation.AnimatorListenerAdapter; | ||
import android.animation.TypeEvaluator; | ||
import android.animation.ValueAnimator; | ||
import android.graphics.BitmapFactory; | ||
import android.graphics.Color; | ||
import android.os.Bundle; | ||
import android.support.annotation.NonNull; | ||
import android.support.v7.app.AppCompatActivity; | ||
import android.view.animation.LinearInterpolator; | ||
import android.widget.Toast; | ||
import com.mapbox.api.directions.v5.DirectionsCriteria; | ||
import com.mapbox.api.directions.v5.MapboxDirections; | ||
import com.mapbox.api.directions.v5.models.DirectionsResponse; | ||
import com.mapbox.api.directions.v5.models.DirectionsRoute; | ||
import com.mapbox.geojson.Feature; | ||
import com.mapbox.geojson.FeatureCollection; | ||
import com.mapbox.geojson.LineString; | ||
import com.mapbox.geojson.Point; | ||
import com.mapbox.mapboxandroiddemo.R; | ||
import com.mapbox.mapboxsdk.Mapbox; | ||
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory; | ||
import com.mapbox.mapboxsdk.geometry.LatLng; | ||
import com.mapbox.mapboxsdk.geometry.LatLngBounds; | ||
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.LineLayer; | ||
import com.mapbox.mapboxsdk.style.layers.Property; | ||
import com.mapbox.mapboxsdk.style.layers.SymbolLayer; | ||
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource; | ||
import com.mapbox.turf.TurfMeasurement; | ||
import retrofit2.Call; | ||
import retrofit2.Callback; | ||
import retrofit2.Response; | ||
import timber.log.Timber; | ||
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import java.util.ArrayList; | ||
import java.util.List; | ||
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import static com.mapbox.core.constants.Constants.PRECISION_6; | ||
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap; | ||
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.iconOffset; | ||
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconSize; | ||
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineCap; | ||
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineColor; | ||
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineJoin; | ||
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineWidth; | ||
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/** | ||
* Make a directions request with the Mapbox Directions API and then draw a line behind a moving | ||
* SymbolLayer icon which moves along the Directions response route. | ||
*/ | ||
public class MovingIconWithTrailingLineActivity extends AppCompatActivity { | ||
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private static final String DOT_SOURCE_ID = "dot-source-id"; | ||
private static final String LINE_SOURCE_ID = "line-source-id"; | ||
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private MapView mapView; | ||
private MapboxMap mapboxMap; | ||
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private GeoJsonSource pointSource; | ||
private GeoJsonSource lineSource; | ||
private List<Point> routeCoordinateList; | ||
private List<Point> markerLinePointList = new ArrayList<>(); | ||
private int routeIndex; | ||
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private Animator currentAnimator; | ||
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@Override | ||
protected void onCreate(Bundle savedInstanceState) { | ||
super.onCreate(savedInstanceState); | ||
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// 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)); | ||
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// This contains the MapView in XML and needs to be called after the access token is configured. | ||
setContentView(R.layout.activity_dds_moving_icon_with_trailing_line); | ||
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// Initialize the mapboxMap view | ||
mapView = findViewById(R.id.mapView); | ||
mapView.onCreate(savedInstanceState); | ||
mapView.getMapAsync(new OnMapReadyCallback() { | ||
@Override | ||
public void onMapReady(MapboxMap mapboxMap) { | ||
MovingIconWithTrailingLineActivity.this.mapboxMap = mapboxMap; | ||
mapboxMap.setStyle(Style.LIGHT, new Style.OnStyleLoaded() { | ||
@Override | ||
public void onStyleLoaded(@NonNull Style style) { | ||
// Use the Mapbox Directions API to get a directions route | ||
getRoute(style, | ||
Point.fromLngLat(38.7508, 9.0309), // coffee shop | ||
Point.fromLngLat(38.795902, 8.984467) // airport | ||
); | ||
} | ||
}); | ||
} | ||
}); | ||
} | ||
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/** | ||
* Add data to the map once the GeoJSON has been loaded | ||
* | ||
* @param featureCollection returned GeoJSON FeatureCollection from the Directions API route request | ||
*/ | ||
private void initData(Style fullyLoadedStyle, @NonNull FeatureCollection featureCollection) { | ||
routeCoordinateList = ((LineString) featureCollection.features().get(0).geometry()).coordinates(); | ||
initSources(fullyLoadedStyle, featureCollection); | ||
initSymbolLayer(fullyLoadedStyle); | ||
initDotLinePath(fullyLoadedStyle); | ||
animate(); | ||
} | ||
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/** | ||
* Set up the repeat logic for moving the icon along the route. | ||
*/ | ||
private void animate() { | ||
// Check if we are at the end of the points list | ||
if ((routeCoordinateList.size() - 1 > routeIndex)) { | ||
Point indexPoint = routeCoordinateList.get(routeIndex); | ||
Point newPoint = Point.fromLngLat(indexPoint.longitude(), indexPoint.latitude()); | ||
currentAnimator = createLatLngAnimator(indexPoint, newPoint); | ||
currentAnimator.start(); | ||
routeIndex++; | ||
} | ||
} | ||
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private static class PointEvaluator implements TypeEvaluator<Point> { | ||
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@Override | ||
public Point evaluate(float fraction, Point startValue, Point endValue) { | ||
return Point.fromLngLat( | ||
startValue.longitude() + ((endValue.longitude() - startValue.longitude()) * fraction), | ||
startValue.latitude() + ((endValue.latitude() - startValue.latitude()) * fraction) | ||
); | ||
} | ||
} | ||
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private Animator createLatLngAnimator(Point currentPosition, Point targetPosition) { | ||
ValueAnimator latLngAnimator = ValueAnimator.ofObject(new PointEvaluator(), currentPosition, targetPosition); | ||
latLngAnimator.setDuration((long) TurfMeasurement.distance(currentPosition, targetPosition, "meters")); | ||
latLngAnimator.setInterpolator(new LinearInterpolator()); | ||
latLngAnimator.addListener(new AnimatorListenerAdapter() { | ||
@Override | ||
public void onAnimationEnd(Animator animation) { | ||
super.onAnimationEnd(animation); | ||
animate(); | ||
} | ||
}); | ||
latLngAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { | ||
@Override | ||
public void onAnimationUpdate(ValueAnimator animation) { | ||
Point point = (Point) animation.getAnimatedValue(); | ||
pointSource.setGeoJson(point); | ||
markerLinePointList.add(point); | ||
lineSource.setGeoJson(Feature.fromGeometry(LineString.fromLngLats(markerLinePointList))); | ||
} | ||
}); | ||
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return latLngAnimator; | ||
} | ||
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/** | ||
* Make a request to the Mapbox Directions API. Once successful, pass the route to the | ||
* route layer. | ||
* | ||
* @param origin the starting point of the route | ||
* @param destination the desired finish point of the route | ||
*/ | ||
private void getRoute(@NonNull final Style style, final Point origin, final Point destination) { | ||
MapboxDirections client = MapboxDirections.builder() | ||
.origin(origin) | ||
.destination(destination) | ||
.overview(DirectionsCriteria.OVERVIEW_FULL) | ||
.profile(DirectionsCriteria.PROFILE_WALKING) | ||
.accessToken(getString(R.string.access_token)) | ||
.build(); | ||
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client.enqueueCall(new Callback<DirectionsResponse>() { | ||
@Override | ||
public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) { | ||
System.out.println(call.request().url().toString()); | ||
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// You can get the generic HTTP info about the response | ||
Timber.d("Response code: %s", response.code()); | ||
if (response.body() == null) { | ||
Timber.e("No routes found, make sure you set the right user and access token."); | ||
return; | ||
} else if (response.body().routes().size() < 1) { | ||
Timber.e("No routes found"); | ||
return; | ||
} | ||
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// Get the directions route | ||
DirectionsRoute currentRoute = response.body().routes().get(0); | ||
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if (style.isFullyLoaded()) { | ||
mapboxMap.easeCamera(CameraUpdateFactory.newLatLngBounds( | ||
new LatLngBounds.Builder() | ||
.include(new LatLng(origin.latitude(), origin.longitude())) | ||
.include(new LatLng(destination.latitude(), destination.longitude())) | ||
.build(), 50), 5000); | ||
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initData(style,FeatureCollection.fromFeature( | ||
Feature.fromGeometry(LineString.fromPolyline(currentRoute.geometry(), PRECISION_6)))); | ||
} | ||
} | ||
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@Override | ||
public void onFailure(Call<DirectionsResponse> call, Throwable throwable) { | ||
Timber.e("Error: %s", throwable.getMessage()); | ||
Toast.makeText(MovingIconWithTrailingLineActivity.this, "Error: " + throwable.getMessage(), | ||
Toast.LENGTH_SHORT).show(); | ||
} | ||
}); | ||
} | ||
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/** | ||
* Add various sources to the map. | ||
*/ | ||
private void initSources(@NonNull Style loadedMapStyle, @NonNull FeatureCollection featureCollection) { | ||
loadedMapStyle.addSource(pointSource = new GeoJsonSource(DOT_SOURCE_ID, featureCollection)); | ||
loadedMapStyle.addSource(lineSource = new GeoJsonSource(LINE_SOURCE_ID)); | ||
} | ||
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/** | ||
* Add the marker icon SymbolLayer. | ||
*/ | ||
private void initSymbolLayer(@NonNull Style loadedMapStyle) { | ||
loadedMapStyle.addImage("moving-red-marker", BitmapFactory.decodeResource( | ||
getResources(), R.drawable.pink_dot)); | ||
loadedMapStyle.addLayer(new SymbolLayer("symbol-layer-id", DOT_SOURCE_ID).withProperties( | ||
iconImage("moving-red-marker"), | ||
iconSize(1f), | ||
iconOffset(new Float[] {5f, 0f}), | ||
iconIgnorePlacement(true), | ||
iconAllowOverlap(true) | ||
)); | ||
} | ||
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/** | ||
* Add the LineLayer for the marker icon's travel route. Adding it under the "road-label" layer, so that the | ||
* this LineLayer doesn't block the street name. | ||
*/ | ||
private void initDotLinePath(@NonNull Style loadedMapStyle) { | ||
loadedMapStyle.addLayerBelow(new LineLayer("line-layer-id", LINE_SOURCE_ID).withProperties( | ||
lineColor(Color.parseColor("#F13C6E")), | ||
lineCap(Property.LINE_CAP_ROUND), | ||
lineJoin(Property.LINE_JOIN_ROUND), | ||
lineWidth(4f)), "road-label"); | ||
} | ||
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@Override | ||
public void onResume() { | ||
super.onResume(); | ||
mapView.onResume(); | ||
} | ||
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@Override | ||
protected void onStart() { | ||
super.onStart(); | ||
mapView.onStart(); | ||
} | ||
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@Override | ||
protected void onStop() { | ||
super.onStop(); | ||
mapView.onStop(); | ||
} | ||
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@Override | ||
public void onPause() { | ||
super.onPause(); | ||
mapView.onPause(); | ||
} | ||
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@Override | ||
public void onLowMemory() { | ||
super.onLowMemory(); | ||
mapView.onLowMemory(); | ||
} | ||
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@Override | ||
protected void onDestroy() { | ||
super.onDestroy(); | ||
if (currentAnimator != null) { | ||
currentAnimator.cancel(); | ||
} | ||
mapView.onDestroy(); | ||
} | ||
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@Override | ||
protected void onSaveInstanceState(Bundle outState) { | ||
super.onSaveInstanceState(outState); | ||
mapView.onSaveInstanceState(outState); | ||
} | ||
} | ||
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