MapBox使用之路線規劃

Mapbox的初始化等操作此篇文章不贅述，直接忽略，直接用代碼說明怎麼使用MapBox的路線規劃

1.導入

implementation 'com.mapbox.mapboxsdk:mapbox-android-sdk:6.3.0'
implementation 'com.mapbox.mapboxsdk:mapbox-android-navigation:0.41.0'

目前MapBox只提供以下四種類型的路線規劃

2.大概流程就是通過傳經緯度和路線類型請求數據，然後根據請求回來的數據進行畫線，以下完整代碼是根據“步行”和“駕車”兩種方法規劃出不同的路線，並且繪製出不同顏色。

 mapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(MapboxMap mapboxMap) {
                map = mapboxMap;
                LatLng latLng = new LatLng(“起點緯度”,"起點經度");
                MarkerOptions options = new MarkerOptions();
                Icon icon = IconFactory.getInstance(MapActivity.this).fromBitmap(BitmapFactory.decodeResource(getResources(), R.mipmap.map_icon_school));
                options.setIcon(icon);
                options.setPosition(latLng);
                mapboxMap.addMarker(options);
                mapboxMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

                mapboxMap.addMarker(
                        new MarkerOptions()
                                .icon(IconFactory.getInstance(MapActivity.this).fromResource(R.mipmap.map_icon_home))
                                .position(new LatLng(“終點緯度”,"終點經度");
    
                //特別注意，這裏是經度在前，緯度在後
                getRoute(Point.fromLngLat(“起點經度”, “起點緯度”),
                       Point.fromLngLat(“終點經度”, “終點緯度”));
            }
        });


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


        for (int i = 0; i < 2; i++) {

            String profile = "";

            switch (i) {
                case 0:
                    profile = DirectionsCriteria.PROFILE_WALKING;
                    break;
                case 1:
                    profile = DirectionsCriteria.PROFILE_DRIVING;
                    break;

            }

            MapboxDirections client = MapboxDirections.builder()
                    .origin(origin)
                    .destination(destination)
                    .profile(profile)
                    .destination(destination)
                    .accessToken(getString(R.string.mapbox_access_token)).
                            build();


            String finalProfile = profile;
            client.enqueueCall(new Callback<DirectionsResponse>() {
                @Override
                public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
                    if (response.body() == null) {
                        return;
                    }
                    // Print some info about the route
                    DirectionsRoute currentRoute = response.body().routes().get(0);
                    // Draw the route on the map
                    drawRoute(currentRoute, finalProfile);
                }

                @Override


                public void onFailure(Call<DirectionsResponse> call, Throwable t) {
                    Toast.makeText(MapActivity.this, "Error: " + t.getMessage(), Toast.LENGTH_SHORT).show();
                }
            });


        }


    }

private void drawRoute(DirectionsRoute route, String profile) {
        // Convert LineString coordinates into LatLng[]
        LineString lineString = LineString.fromPolyline(route.geometry(), Constants.PRECISION_5);
        List<Point> coordinates = lineString.coordinates();
        LatLng[] points = new LatLng[coordinates.size()];
        for (int i = 0; i < coordinates.size(); i++) {
            points[i] = new LatLng(
                    coordinates.get(i).latitude() / 10,
                    coordinates.get(i).longitude()
                            / 10
            );
        }

        String color = "#30d176";
        switch (profile) {
            case DirectionsCriteria.PROFILE_WALKING:
                color = "#30d176";
                break;
            case DirectionsCriteria.PROFILE_DRIVING:
                color = "#48bef3";
                break;
        }

        // Draw Points on MapView
        map.addPolyline(new PolylineOptions()
                .add(points)
                .color(Color.parseColor(color))
                .width(5));
    }