location

Description:

location

location #




This plugin for Flutter
handles getting a location on Android and iOS. It also provides callbacks when the location is changed.





Web demo (more features available on Android/iOS)
Getting Started #
Add this to your package's pubspec.yaml file:
dependencies:
location: ^5.0.0
copied to clipboard
Android #
To use location background mode on Android, you have to use the enableBackgroundMode({bool enable}) API before accessing location in the background and adding necessary permissions. You should place the required permissions in your applications
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION"/>
copied to clipboard
Remember that the user has to accept the location permission to always allow to use the background location. The Android 11 option to always allow is not presented on the location permission dialog prompt. The user has to enable it manually from the app settings. This should be explained to the user on a separate UI that redirects the user to the app's location settings managed by the operating system. More on that topic can be found on Android developer pages.
iOS #
And to use it in iOS, you have to add this permission in Info.plist :
// This is probably the only one you need. Background location is supported
// by this -- the caveat is that a blue badge is shown in the status bar
// when the app is using location service while in the background.
NSLocationWhenInUseUsageDescription

// Deprecated, use NSLocationAlwaysAndWhenInUseUsageDescription instead.
NSLocationAlwaysUsageDescription

// Use this very carefully. This key is required only if your iOS app
// uses APIs that access the user’s location information at all times,
// even if the app isn't running.
NSLocationAlwaysAndWhenInUseUsageDescription
copied to clipboard
To receive location when application is in background, to Info.plist you have to add property list key :
UIBackgroundModes
copied to clipboard
with string value:
location
copied to clipboard
Web #
Nothing to do, the plugin works directly out of box.
macOS #
Ensure that the application is properly "sandboxed" and that the location is enabled. You can do this in Xcode with the following steps:

In the project navigator, click on your application's target. This should bring up a view with tabs such as "General", "Capabilities", "Resource Tags", etc.
Click on the "Capabilities" tab. This will give you a list of items such as "App Groups", "App Sandbox", and so on. Each item will have an "On/Off" button.
Turn on the "App Sandbox" item and press the ">" button on the left to show the sandbox stuff.
In the "App Data" section, select "Location".

Add this permission in Info.plist :
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
copied to clipboard
Usage #
Then you just have to import the package with
import 'package:location/location.dart';
copied to clipboard
In order to request location, you should always check Location Service status and Permission status manually
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();
copied to clipboard
You can also get continuous callbacks when your position is changing:
location.onLocationChanged.listen((LocationData currentLocation) {
// Use current location
});
copied to clipboard
To receive location when application is in background you have to enable it:
location.enableBackgroundMode(enable: true)
copied to clipboard
Be sure to check the example project to get other code samples.
On Android, a foreground notification is displayed with information that location service is running in the background.
On iOS, while the app is in the background and gets the location, the blue system bar notifies users about updates. Tapping on this bar moves the User back to the app.




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.


Future<bool>
enableBackgroundMode({bool enable}) Allow or disallow to retrieve location events in the background. Return a boolean to know if background mode was successfully enabled.



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 and web
final double heading; // Heading is the horizontal direction of travel of this device, in degrees
final double time; // timestamp of the LocationData
final bool isMock; // Is the location currently mocked
}


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.
deniedForever
}
copied to clipboard
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 !