我正在尝试为两个指定点在地图上显示一条路线，最终目标是生成逐步说明。 我正在使用MapBox提供的Directions API，并根据此示例构建我的代码。
地图似乎按预期加载，并且在显示地图方面没有错误，但是对于指定的调用或者说整张地图上都没有路线/线路呈现。
我曾尝试使用不同的起点和终点，但仍无法生成提供的示例中所示的期望结果。
代码：
@SuppressWarnings("deprecation")
public class MainActivity extends AppCompatActivity implements
OnMapReadyCallback, PermissionsListener, View.OnClickListener, MapboxMap.OnMapClickListener, MapboxMap.OnMarkerClickListener {
private MapView mapView;
private MapboxMap mapboxMap;
private static final String TAG = "MainActivity";
private MapboxDirections client;
private DirectionsRoute currentRoute;
private static final String ROUTE_LAYER_ID = "route-layer-id";
private static final String ROUTE_SOURCE_ID = "route-source-id";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Mapbox access token is configured here.
Mapbox.getInstance(this, getString(R.string.mapbox_access_token));
setContentView(R.layout.activity_main);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
this.mapboxMap = mapboxMap;
mapboxMap.addOnMapClickListener(this);
mapboxMap.setStyle(Style.MAPBOX_STREETS,
new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
enableLocationComponent(style);
Point origin = Point.fromLngLat(-3.588098, 37.176164);
Point destination = Point.fromLngLat(-3.601845, 37.184080);
initSource(style);
initLayers(style);
getRoute(origin, destination);
}
});
mapboxMap.setOnMarkerClickListener(this);
}
private void initLayers(@NonNull Style loadedMapStyle) {
LineLayer routeLayer = new LineLayer(ROUTE_LAYER_ID, ROUTE_SOURCE_ID);
routeLayer.setProperties(
lineCap(Property.LINE_CAP_ROUND),
lineJoin(Property.LINE_JOIN_ROUND),
lineWidth(5f),
lineColor(Color.parseColor("#009688"))
);
loadedMapStyle.addLayer(routeLayer);
}
private void initSource(@NonNull Style loadedMapStyle) {
loadedMapStyle.addSource(new GeoJsonSource(ROUTE_SOURCE_ID,
FeatureCollection.fromFeatures(new Feature[] {})));
}
private void getRoute(Point origin, Point destination) {
client = MapboxDirections.builder()
.origin(origin)
.destination(destination)
.overview(DirectionsCriteria.OVERVIEW_FULL)
.profile(DirectionsCriteria.PROFILE_DRIVING)
.accessToken(Mapbox.getAccessToken())
.build();
client.enqueueCall(new Callback<DirectionsResponse>() {
@Override
public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
// You can get the generic HTTP info about the response
Timber.d("Response code: " + 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;
}
// Get the directions route
currentRoute = response.body().routes().get(0);
// Make a toast which displays the route's distance
/*Toast.makeText(MainActivity.this, String.format(
getString(R.string.directions_activity_toast_message),
currentRoute.distance()), Toast.LENGTH_SHORT).show();*/
if (mapboxMap != null) {
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
// Retrieve and update the source designated for showing the directions route
GeoJsonSource source = style.getSourceAs(ROUTE_SOURCE_ID);
// Create a LineString with the directions route's geometry and
// reset the GeoJSON source for the route LineLayer source
if (source != null) {
Timber.d("onResponse: source != null");
source.setGeoJson(FeatureCollection.fromFeature(
Feature.fromGeometry(LineString.fromPolyline(currentRoute.geometry(), PRECISION_6))));
}
}
});
}
}
@Override
public void onFailure(Call<DirectionsResponse> call, Throwable throwable) {
Timber.e("Error: " + throwable.getMessage());
Toast.makeText(MainActivity.this, "Error: " + throwable.getMessage(),
Toast.LENGTH_SHORT).show();
}
});
}
Mbgl时，您的 logcat 中是否有任何内容？ - langsmith