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. 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 MGLMapboxAccessToken to your access token. You can obtain an access token from the Mapbox account page.

  2. 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.

  3. 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>

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,
                     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 ViewAndroid View
iOS ViewAndroid 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 ViewNavigation View
Embedded iOS ViewEmbedded 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

Libraries