A Flutter plugin to Easily Handle realtime Location in iOS and Android

Flutter Location PluginThis plugin for Flutter handles getting location on Android and iOS. It also provides callbacks when location is changed.

New experimental feature

To get location updates even your app is closed, you can see this wiki post.

Getting Started

Add this to your package’s pubspec.yaml file:

dependencies:
  location: ^2.5.0

Android

With Flutter 1.12, all the dependencies are automatically added to your project. If your project was created before Flutter 1.12, you may need to follow this.

iOS

And to use it in iOS, you have to add this permission in Info.plist :

NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription

Usage

Then you just have to import the package with

import 'package:location/location.dart';

In order to request location, you should always check manually Location Service status and Permission status.

Location location = new Location();

bool _serviceEnabled;
PermissionStatus _permissionGranted;
LocationData _locationData;

_serviceEnabled = await location.serviceEnabled();
if (!_serviceEnabled) {
  _serviceEnabled = await location.requestService();
  if (!_serviceEnabled) {
    return;
  }
}

_permissionGranted = await location.hasPermission();
if (_permissionGranted == PermissionStatus.DENIED) {
  _permissionGranted = await location.requestPermission();
  if (_permissionGranted != PermissionStatus.GRANTED) {
    return;
  }
}

_locationData = await location.getLocation();

You can also get continuous callbacks when your position is changing:

location.onLocationChanged().listen((LocationData currentLocation) {
  // Use current location
});

Be sure to check the example project to get other code samples.

Public Methods Summary

Return	Description
Future<PermissionStatus>	requestPermission()
Request the Location permission. Return a PermissionStatus to know if the permission has been granted.
Future<PermissionStatus>	hasPermission()
Return a PermissionStatus to know the state of the location permission.
Future<bool>	serviceEnabled()
Return a boolean to know if the Location Service is enabled or if the user manually deactivated it.
Future<bool>	requestService()
Show an alert dialog to request the user to activate the Location Service. On iOS, will only display an alert due to Apple Guidelines, the user having to manually go to Settings. Return a boolean to know if the Location Service has been activated (always false on iOS).
Future<bool>	changeSettings(LocationAccuracy accuracy = LocationAccuracy.HIGH, int interval = 1000, double distanceFilter = 0)
Will change the settings of futur requests. accuracywill describe the accuracy of the request (see the LocationAccuracy object). interval will set the desired interval for active location updates, in milliseconds (only affects Android). distanceFilter set the minimum displacement between location updates in meters.
Future<LocationData>	getLocation()
Allow to get a one time position of the user. It will try to request permission if not granted yet and will throw a PERMISSION_DENIED error code if permission still not granted.
Stream<LocationData>	onLocationChanged()
Get the stream of the user’s location. It will try to request permission if not granted yet and will throw a PERMISSION_DENIED error code if permission still not granted.

You should try to manage permission manually with requestPermission() to avoid error, but plugin will try handle some cases for you.

Objects

class LocationData {
  final double latitude; // Latitude, in degrees
  final double longitude; // Longitude, in degrees
  final double accuracy; // Estimated horizontal accuracy of this location, radial, in meters
  final double altitude; // In meters above the WGS 84 reference ellipsoid
  final double speed; // In meters/second
  final double speedAccuracy; // In meters/second, always 0 on iOS
  final double heading; //Heading is the horizontal direction of travel of this device, in degrees
  final double time; //timestamp of the LocationData
}

enum LocationAccuracy { 
  POWERSAVE, // To request best accuracy possible with zero additional power consumption, 
  LOW, // To request "city" level accuracy
  BALANCED, // To request "block" level accuracy
  HIGH, // To request the most accurate locations available
  NAVIGATION // To request location for navigation usage (affect only iOS)
}

// Status of a permission request to use location services.
enum PermissionStatus {
  /// The permission to use location services has been granted.
  GRANTED,
  // The permission to use location services has been denied by the user. May have been denied forever on iOS.
  DENIED,
  // The permission to use location services has been denied forever by the user. No dialog will be displayed on permission request.
  DENIED_FOREVER
}

Note: you can convert the timestamp into a DateTime with: DateTime.fromMillisecondsSinceEpoch(locationData.time.toInt())

Feedback

Please feel free to give me any feedback helping support this plugin !

Download Details:

Author: Lyokone

GitHub: https://github.com/Lyokone/flutterlocation

#flutter #programming #dart