我正在创建一个android应用程序，它只用于一个城市的离线工作（显示标记并启动导航）。目前，我下载Map的方式如下：

// Set up the OfflineManager
        OfflineManager offlineManager = OfflineManager.getInstance(activity);

                // Create a bounding box for the offline region
                LatLngBounds latLngBounds = new LatLngBounds.Builder()
                        .include(new LatLng(00.083717, -0.778624)) // Northeast
                        .include(new LatLng(00.992312, -0.895262)) // Southwest
                        .build();

                // Define the offline region
                OfflineTilePyramidRegionDefinition definition = new OfflineTilePyramidRegionDefinition(
                        style.getUri(),
                        latLngBounds,
                        15,
                        30,
                        activity.getResources().getDisplayMetrics().density);

                // Implementation that uses JSON to store Yosemite National Park as the offline region name.
                byte[] metadata;
                try {
                    JSONObject jsonObject = new JSONObject();
                    jsonObject.put(JSON_FIELD_REGION_NAME, "City");
                    String json = jsonObject.toString();
                    metadata = json.getBytes(JSON_CHARSET);
                } catch (Exception exception) {
                    Log.e(TAG, "Failed to encode metadata: " + exception.getMessage());
                    metadata = null;
                }
                // Create the region asynchronously
                offlineManager.createOfflineRegion(definition, metadata,
                        new OfflineManager.CreateOfflineRegionCallback() {
                            @Override
                            public void onCreate(OfflineRegion offlineRegion) {

                                offlineRegion.setDownloadState(OfflineRegion.STATE_ACTIVE);

                                // Monitor the download progress using setObserver
                                offlineRegion.setObserver(new OfflineRegion.OfflineRegionObserver() {
                                    @Override
                                    public void onStatusChanged(OfflineRegionStatus status) {

                                        // Calculate the download percentage
                                        double percentage = status.getRequiredResourceCount() >= 0
                                                ? (100.0 * status.getCompletedResourceCount() / status.getRequiredResourceCount()) :
                                                0.0;

                                        if (status.isComplete()) {
                                            // Download complete
                                            Log.d(TAG, "Region downloaded successfully.");
                                        } else if (status.isRequiredResourceCountPrecise()) {
                                            Log.d(TAG, String.valueOf(percentage));
                                        }
                                    }

                                    @Override
                                    public void onError(OfflineRegionError error) {
                                        // If an error occurs, print to logcat
                                        Log.e(TAG, "onError reason: " + error.getReason());
                                        Log.e(TAG, "onError message: " + error.getMessage());
                                    }

                                    @Override
                                    public void mapboxTileCountLimitExceeded(long limit) {
                                        // Notify if offline region exceeds maximum tile count
                                        Log.e(TAG, "Mapbox tile count limit exceeded: " + limit);
                                    }
                                });
                            }

                            @Override
                            public void onError(String error) {
                                Log.e(TAG, "Error: " + error);
                            }
                        });

问题是，当我想生成路线，然后启动导航时，它只能在线工作。如何下载Map，使其与mapbox navigation sdk兼容？
下面是我如何生成路线和启动导航的代码：

private void getRoute(Point origin, Point destination) {
        NavigationRoute.builder(getContext())
                .accessToken(Mapbox.getAccessToken())
                .origin(origin)
                .profile(DirectionsCriteria.PROFILE_WALKING)
                .destination(destination)
                .build()
                .getRoute(new Callback<DirectionsResponse>() {
                    @Override
                    public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
// You can get the generic HTTP info about the response
                        Log.d(TAG, "Response code: " + response.code());
                        if (response.body() == null) {
                            Log.e(TAG, "No routes found, make sure you set the right user and access token.");
                            return;
                        } else if (response.body().routes().size() < 1) {
                            Log.e(TAG, "No routes found");
                            return;
                        }

                        currentRoute = response.body().routes().get(0);

// Draw the route on the map
                        if (navigationMapRoute != null) {
                            navigationMapRoute.removeRoute();
                        } else {
                            navigationMapRoute = new NavigationMapRoute(null, mapView, mapboxMap, R.style.NavigationMapRoute);
                        }
                        navigationMapRoute.addRoute(currentRoute);
                    }

                    @Override
                    public void onFailure(Call<DirectionsResponse> call, Throwable throwable) {
                        Log.e(TAG, "Error: " + throwable.getMessage());
                    }
                });
    }

-------发射

button.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (currentRoute != null) {
                            boolean simulateRoute = true;
                            NavigationLauncherOptions options = NavigationLauncherOptions.builder()
                                    .directionsRoute(currentRoute)
                                    .shouldSimulateRoute(simulateRoute)
                                    .build();
// Call this method with Context from within an Activity
                            NavigationLauncher.startNavigation(getActivity(), options);
                        }
                    }
                });

有人能帮我一下吗？也许我应该使用导航ui-sdk？