flutter_map_location_marker

flutter_map_location_marker

flutter_map_location_marker is a flutter_map plugin for displaying the 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() 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_rotation_sensor package, but with type conversion, streams from other sources are also supported.

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

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

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

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(
       alignPositionOnUpdate: AlignOnUpdate.always,
       alignDirectionOnUpdate: AlignOnUpdate.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 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 can I get the positionStream , headingStream or their origin streams from a CurrentLocationLayer widget?

A: You should not get these streams from a CurrentLocationLayer widget. Instead, create your own streams with the same types and also pass them to all widgets that 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<LocationMarkerPosition?> and Stream<LocationMarkerHeading?>, respectively. You may see this example to know about how to do this.