flutter_map_location_marker #

flutter_map_location_marker is a flutter_map plugin for displaying device's current location on a map. It provides a simple and flexible way to add a customizable location marker to your map.

Join flutter_map Discord server to talk about flutter_map_location_marker, get help and help others in the #plugins channel.

Features #

• Simple: The only thing you need to do is to add a CurrentLocationLayer() in to your map because all parameters have good default values.

• Flexible: The default implementation receives the device's position from the geolocator package and the device's heading from the flutter_compass package, but with type conversion, streams from other sources are also supported.

• Auto-following: The map follows the new location when location is updated. This feature is disabled by default.

• Auto-rotating: The map can be rotated automatically as navigation mode. This feature is disabled by default.

• Customization: The location marker can be fully customized, including the colors of the accuracy circle and header.

Usage #

1. Add flutter_map_location_marker to your pubspec.yaml:

   dependencies:
     flutter_map_location_marker: any # or latest version
   

2. Add permission by following the instructions from the geolocator package.

3. Add the layer widget into FlutterMap:

   Widget build(BuildContext context) {
     return FlutterMap(
       children: [
         TileLayer(
           urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
           maxZoom: 19,
         ),
         CurrentLocationLayer(), // <-- add layer here
       ],
     );
   }
   

4. Discover more parameters in CurrentLocationLayer .

   Widget build() {
     return CurrentLocationLayer(
       followOnLocationUpdate: FollowOnLocationUpdate.always,
       turnOnHeadingUpdate: TurnOnHeadingUpdate.never,
       style: LocationMarkerStyle(
         marker: const DefaultLocationMarker(
           child: Icon(
             Icons.navigation,
             color: Colors.white,
           ),
         ),
         markerSize: const Size(40, 40),
         markerDirection: MarkerDirection.heading,
       ),
     );
   }
   

5. Consider using either the AnimatedLocationMarkerLayer or the LocationMarkerLayer if multiple location markers need to be displayed.

Examples #

1. Marker Customization : Change the marker to any widget you want.

2. Floating Action Button to Follow Current Location : Use a floating action button to move and zoom the map to the current location.

3. Change Geolocator Settings : Define Geolocator settings yourself.

4. Selectable Distance Filter : Change Geolocator settings at the runtime.

5. Custom Stream : Use your own stream, such as position stream from another library or predefined route, as the source.

6. No Stream : Use Flutter setState() to update position and heading.

7. Navigation Mode : Rotate the map to keep heading pointing upward.

8. Default Stream : Share the default streams between your app and this plugin.

FAQ #

Q: How to get the positionStream , headingStream or their origin streams from a CurrentLocationLayer widget?

A: No, you should not get these streams from a CurrentLocationLayer widget. Instead, create you own streams with the the same types and also pass it to all the widgets which need them. CurrentLocationLayer doesn't own the streams; it just listens to them. You can use any implementation of position and heading streams, as long as the stream types are Stream<Position> and Stream<double>, respectively. You may see this example to know about how to do this.