Mapbox（android）不显示方向

Question

作为一名用户，我想使用Android应用程序使用路线在地图上导航。一旦我开始导航，我会开发其他方法来组织导航，但是到目前为止，我还不能在地图上显示路线。

我正在使用Mapbox自己提供的教程：https://www.mapbox.com/android-sdk/examples/directions/。没有消息错误，事实上，显示路线距离的toast消息在我访问地图视图后可见<代码>（“路线0.0米长。”） 我检查了日志，通用HTML代码是200（这是正确的），调试消息显示了一条0.0米长的路径。除此之外，日志中没有发现任何错误。

我已经对代码进行了一周的反复检查，检查是否有任何错误，但我没有发现任何可能导致错误的东西，无法显示路线。我也调试了代码，它毫无问题地实现了drawRoute函数，我也检查了令牌，它工作得很好。

我做了什么没有显示路线？谢谢！

尝试查看路线时的图像示例。

Java代码：

public class Mapa extends Activity {
private static final String TAG = "Mapa"; //Tag para usar no log de debug e error

private MapView mapView;
private MapboxMap map;
private DirectionsRoute currentRoute;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Mapbox usa esse token de acesso atraves de uma conta do mapbox, so precisa ser configurado uma vez!
    MapboxAccountManager.start(this,getString(R.string.access_token));

    // Contem o mapview exposto em XML e precisa ser chamado LOGO APOS o account manager
    setContentView(R.layout.activity_main);

    // Funcao que pede permissao para o usuario no seu celular -- TODO
    PedePermissao();

    // Origem: Rodoviaria
    final Position origin = Position.fromCoordinates(-15.794082, -47.882645);
    // Destino: Reitoria
    final Position destination = Position.fromCoordinates(-15.762604, -47.866611);


    //Configuracao do mapa
    mapView = (MapView) findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(MapboxMap mapboxMap) {
            map = mapboxMap;

            // Criacao e declaracao do icone
            IconFactory iconFactory = IconFactory.getInstance(Mapa.this);
            Drawable iconDrawable = ContextCompat.getDrawable(Mapa.this, R.drawable.infoicon);
            Icon icon = iconFactory.fromDrawable(iconDrawable);
            Drawable iconeDrawableRota = ContextCompat.getDrawable(Mapa.this, R.drawable.infoicon_rota);
            Icon iconeRota = iconFactory.fromDrawable(iconeDrawableRota);

            //Marcadores das instalacoes
            mapboxMap.addMarker(new MarkerViewOptions()
                    .position(new LatLng(-15.76363, -47.86949))
                    .title("ICC Centro")
                    .snippet(getString(R.string.desc_ICC_Centro))
                    .icon(icon));

            mapboxMap.addMarker(new MarkerViewOptions()
                    .position(new LatLng(-15.7629936, -47.86717415))
                    .title("Reitoria")
                    .snippet(getString(R.string.desc_Reitoria))
                    .icon(icon));

            mapboxMap.addMarker(new MarkerViewOptions()
                    .position(new LatLng(-15.76196106, -47.87008166))
                    .title("FAU")
                    .snippet(getString(R.string.desc_FAU))
                    .icon(icon));

            // Adicionando os marcadores de destino da rota
            mapboxMap.addMarker(new MarkerOptions()
                    .position(new LatLng(origin.getLatitude(), origin.getLongitude()))
                    .title("Origem")
                    .icon(iconeRota));
            mapboxMap.addMarker(new MarkerOptions()
                    .position(new LatLng(destination.getLatitude(), destination.getLongitude()))
                    .title("Destino")
                    .icon(iconeRota));

            try {
                getRoute(origin, destination);
            } catch (ServicesException servicesException) {
                servicesException.printStackTrace();
            }

            //Dados da janela (infowindow) quando clicar em um ponteiro (marker)
            mapboxMap.setInfoWindowAdapter(new MapboxMap.InfoWindowAdapter() {
                    //...
                }
            });
        }
    });
}

private void getRoute(Position origin, Position destination) throws ServicesException {

    MapboxDirections client = new MapboxDirections.Builder()
            .setOrigin(origin)
            .setDestination(destination)
            .setProfile(DirectionsCriteria.PROFILE_DRIVING)
            .setAccessToken(MapboxAccountManager.getInstance().getAccessToken())
            .build();


    client.enqueueCall(new Callback<DirectionsResponse>() {
        @Override
        public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {

            // Voce pode pegar mensagens de erro genericas do http sobre o response

            Log.d(TAG, "Codigo de resposta: " + response.code());
            if (response.body() == null) {
                Log.e(TAG, "Sem rotas encontradas, porém sem o uso do token, verifique o token de acesso");
                return;
            } else if (response.body().getRoutes().size() < 1) {
                Log.e(TAG, "Sem rotas encontradas!");
                return;
            }

            // Printa algumas informacoes sobre a rota
            currentRoute = response.body().getRoutes().get(0);
            Log.d(TAG, "Distancia: " + currentRoute.getDistance());
            Toast.makeText(
                    Mapa.this,
                    "A rota tem " + currentRoute.getDistance() + " metros de distância.",
                    Toast.LENGTH_SHORT).show();

            // Desenhar a rota no mapa
            drawRoute(currentRoute);
        }

        @Override
        public void onFailure(Call<DirectionsResponse> call, Throwable throwable) {
            Log.e(TAG, "Erro: " + throwable.getMessage());
            Toast.makeText(Mapa.this, "Erro: " + throwable.getMessage(), Toast.LENGTH_SHORT).show();
        }
    });
}

private void drawRoute(DirectionsRoute route) {

    // Converter as coordenadas LineString em LatLng[]
    LineString lineString = LineString.fromPolyline(route.getGeometry(), Constants.OSRM_PRECISION_V5);
    List<Position> coordinates = lineString.getCoordinates();
    LatLng[] points = new LatLng[coordinates.size()];
    for (int i = 0; i < coordinates.size(); i++) {
        points[i] = new LatLng(
                coordinates.get(i).getLatitude(),
                coordinates.get(i).getLongitude());
    }

    // Escrever os pontos no MapView
    map.addPolyline(new PolylineOptions()
            .add(points)
            .color(Color.parseColor("#009688"))
            .width(5));
}

Answer 1

你的坐标顺序不正确。当LatLng按纬度、经度顺序创建时，位置为xy顺序或经度、经度。所以你的出发地和目的地应该是：

// Origem: Rodoviaria
final Position origin = Position.fromCoordinates(-47.882645, -15.794082);
// Destino: Reitoria
final Position destination = Position.fromCoordinates(-47.866611, -15.762604);