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Pub BuyMeACoffee

flutter_mapbox_navigation

Add Turn By Turn Navigation to Your Flutter Application Using MapBox. Never leave your app when you need to navigate your users to a location.

Features

IOS Configuration

  1. Go to your Mapbox account dashboard and create an access token that has the DOWNLOADS:READ scope. PLEASE NOTE: This is not the same as your production Mapbox API token. Make sure to keep it private and do not insert it into any Info.plist file. Create a file named .netrc in your home directory if it doesn’t already exist, then add the following lines to the end of the file:

    machine api.mapbox.com
  login mapbox
  password PRIVATE_MAPBOX_API_TOKEN

    where PRIVATE_MAPBOX_API_TOKEN is your Mapbox API token with the DOWNLOADS:READ scope.

  2. Mapbox APIs and vector tiles require a Mapbox account and API access token. In the project editor, select the application target, then go to the Info tab. Under the “Custom iOS Target Properties” section, set MBXAccessToken to your access token. You can obtain an access token from the Mapbox account page.

  3. In order for the SDK to track the user’s location as they move along the route, set NSLocationWhenInUseUsageDescription to:

    Shows your location on the map and helps improve OpenStreetMap.

  4. Users expect the SDK to continue to track the user’s location and deliver audible instructions even while a different application is visible or the device is locked. Go to the Capabilities tab. Under the Background Modes section, enable “Audio, AirPlay, and Picture in Picture” and “Location updates”. (Alternatively, add the audio and location values to the UIBackgroundModes array in the Info tab.)

Android Configuration

  1. Mapbox APIs and vector tiles require a Mapbox account and API access token. Add your token in strings.xml file of your android apps res/values/ path. The string key should be "mapbox_access_token". You can obtain an access token from the Mapbox account page.
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">Navigation map</string>
    <string name="mapbox_access_token" translatable="false">ADD_MAPBOX_ACCESS_TOKEN_HERE</string>
    <string name="user_location_permission_explanation">This app needs location permissions to show its functionality.</string>
    <string name="user_location_permission_not_granted">You didn\'t grant location permissions.</string>
</resources>
  1. Add the following permissions to the app level Android Manifest
<manifest>
    ...
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    ...
</manifest>
  1. Add the MapBox Downloads token with the downloads:read scope to your gradle.properties file in Android folder to enable downloading the MapBox binaries from the repository. This token can be retrieved from your MapBox Dashboard. You can review the Token Guide to learn more about download tokens
MAPBOX_DOWNLOADS_TOKEN=sk.XXXXXXXXXXXXXXX

After adding the above, your gradle.properties file may look something like this:

org.gradle.jvmargs=-Xmx1536M
android.useAndroidX=true
android.enableJetifier=true
MAPBOX_DOWNLOADS_TOKEN=sk.epe9nE9peAcmwNzKVNqSbFfp2794YtnNepe9nE9peAcmwNzKVNqSbFfp2794YtnN.-HrbMMQmLdHwYb8r

Usage

Declare an instance

  MapBoxNavigation _directions;

Initialize It

    initState()
    {
      _directions = MapBoxNavigation(onRouteEvent: _onRouteEvent);
    }

Set Route Options

    _options = MapBoxOptions(
                     initialLatitude: 36.1175275,
                     initialLongitude: -115.1839524,
                     zoom: 13.0,
                     tilt: 0.0,
                     bearing: 0.0,
                     enableRefresh: false,
                     alternatives: true,
                     voiceInstructionsEnabled: true,
                     bannerInstructionsEnabled: true,
                     allowsUTurnAtWayPoints: true,
                     mode: MapBoxNavigationMode.drivingWithTraffic,
                     mapStyleUrlDay: "https://url_to_day_style",
                     mapStyleUrlNight: "https://url_to_night_style",
                     units: VoiceUnits.imperial,
                     simulateRoute: true,
                     language: "en")

Listen for Events

    Future<void> _onRouteEvent(e) async {

        _distanceRemaining = await _directions.distanceRemaining;
        _durationRemaining = await _directions.durationRemaining;
    
        switch (e.eventType) {
          case MapBoxEvent.progress_change:
            var progressEvent = e.data as RouteProgressEvent;
            _arrived = progressEvent.arrived;
            if (progressEvent.currentStepInstruction != null)
              _instruction = progressEvent.currentStepInstruction;
            break;
          case MapBoxEvent.route_building:
          case MapBoxEvent.route_built:
            _routeBuilt = true;
            break;
          case MapBoxEvent.route_build_failed:
            _routeBuilt = false;
            break;
          case MapBoxEvent.navigation_running:
            _isNavigating = true;
            break;
          case MapBoxEvent.on_arrival:
            _arrived = true;
            if (!_isMultipleStop) {
              await Future.delayed(Duration(seconds: 3));
              await _controller.finishNavigation();
            } else {}
            break;
          case MapBoxEvent.navigation_finished:
          case MapBoxEvent.navigation_cancelled:
            _routeBuilt = false;
            _isNavigating = false;
            break;
          default:
            break;
        }
        //refresh UI
        setState(() {});
      }

Begin Navigating

    final cityhall = WayPoint(name: "City Hall", latitude: 42.886448, longitude: -78.878372);
    final downtown = WayPoint(name: "Downtown Buffalo", latitude: 42.8866177, longitude: -78.8814924);

    var wayPoints = List<WayPoint>();
    wayPoints.add(cityHall);
    wayPoints.add(downtown);
    
    await _directions.startNavigation(wayPoints: wayPoints, options: _options);

Screenshots

Navigation View Android View
iOS View Android View

Embedding Navigation View

Declare Controller

      MapBoxNavigationViewController _controller;

Add Navigation View to Widget Tree

            Container(
                color: Colors.grey,
                child: MapBoxNavigationView(
                    options: _options,
                    onRouteEvent: _onRouteEvent,
                    onCreated:
                        (MapBoxNavigationViewController controller) async {
                      _controller = controller;
                    }),
              ),

Build Route

        var wayPoints = List<WayPoint>();
                            wayPoints.add(_origin);
                            wayPoints.add(_stop1);
                            wayPoints.add(_stop2);
                            wayPoints.add(_stop3);
                            wayPoints.add(_stop4);
                            wayPoints.add(_origin);
                            _controller.buildRoute(wayPoints: wayPoints);

Start Navigation

    _controller.startNavigation();

Additional IOS Configuration

Add the following to your info.plist file

    <dict>
        ...
        <key>io.flutter.embedded_views_preview</key>
        <true/>
        ...
    </dict>

Embedding Navigation Screenshots

Navigation View Navigation View
Embedded iOS View Embedded Android View

To Do

  • [DONE] Android Implementation
  • [DONE] Add more settings like Navigation Mode (driving, walking, etc)
  • [DONE] Stream Events like relevant navigation notifications, metrics, current location, etc.
  • [DONE] Embeddable Navigation View
  • Offline Routing