user_location

A plugin for FlutterMap package to handle and plot the current user location

Usage

Add flutter_map and user_location to your pubspec.yaml :

dependencies:
  flutter_map: any
  user_location: any # or the latest version on Pub

Update your gradle.properties file with this:

android.enableJetifier=true
android.useAndroidX=true
org.gradle.jvmargs=-Xmx1536M

Also make sure that you have added those dependencies in your build.gradle:

  dependencies {
      classpath 'com.android.tools.build:gradle:3.3.0'
      classpath 'com.google.gms:google-services:4.2.0'
  }
  compileSdkVersion 28

Getting Started

Android

In order to use this plugin in Android, you have to add this permission in AndroidManifest.xml :

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Permission check for Android 6+ was added.

iOS

Note: I have not tested the plugin in ios

On iOS you'll need to add the NSLocationWhenInUseUsageDescription to your Info.plist file in order to access the device's location. Simply open your Info.plist file and add the following:

<key>NSLocationWhenInUseUsageDescription</key>
<string>This app needs access to location when open.</string>

If you would like to access the device's location when your App is running in the background, you should also add the NSLocationAlwaysAndWhenInUseUsageDescription (if your App support iOS 10 or earlier you should also add the key NSLocationAlwaysUsageDescription) key to your Info.plist file:

<key>NSLocationAlwaysUsageDescription</key>
<string>This app needs access to location when in the background.</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>This app needs access to location when open and in the background.</string>

Installation guide

Declare and initialize MapController mapController = MapController(); List<Marker> markers = [];
Add UserLocationPlugin() to plugins
Add MarkerLayerOptions and UserLocationOptions in layers

While performing a location update, We remove and add the location marker on the map. Using a single list to hold this location marker along with other markers will unnecessarily also clear them. For that reason, we need to provide an empty marker array to hold the location marker.

Sample code

import 'package:flutter/material.dart';
import 'package:user_location/user_location.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:latlong/latlong.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'User Location Plugin Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {
  // ADD THIS
  MapController mapController = MapController();
  // ADD THIS
  List<Marker> markers = [];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("User Location Plugin")),
        body: FlutterMap(
          options: MapOptions(
            center: LatLng(0,0),
            zoom: 15.0,
            plugins: [
             // ADD THIS
              UserLocationPlugin(),
            ],
          ),
          layers: [
            TileLayerOptions(
              urlTemplate: "https://api.tiles.mapbox.com/v4/"
                  "{id}/{z}/{x}/{y}@2x.png?access_token={accessToken}",
              additionalOptions: {
                'accessToken': '<access_token>',
                'id': 'mapbox.streets',
              },
            ),
            // ADD THIS
            MarkerLayerOptions(markers: markers),
            // ADD THIS
            UserLocationOptions(
                context: context,
                mapController: mapController,
                markers: markers,
                ),
          ],
          // ADD THIS
          mapController: mapController,
        ));
  }
}

Optional parameters

markerWidget overrides the default marker widget
markerlocationStream provides the current location of the marker
updateMapLocationOnPositionChange moves the map to the current location of the user if set to true
showMoveToCurrentLocationFloatingActionButton displays a floating action button at the bottom right of the screen which will redirect the user to their current location. This is useful if the above updateMapLocationOnPositionChange is set to false
moveToCurrentLocationFloatingActionButton is a widget when passed overrides the default floating action button. Default floating action button code:

Container(
    decoration: BoxDecoration(
    color: Colors.blueAccent,
    borderRadius: BorderRadius.circular(20.0),
    boxShadow: [
        BoxShadow(color: Colors.grey, blurRadius: 10.0)
        ]),
    child: Icon(
        Icons.my_location,
        color: Colors.white,
    ),
)

Run the example

See the example/ folder for a working example app.

ivansapr/user_location_plugin