please use package https://pub.dev/packages/devicelocale
I have tested with real device, it works fine
code snippet
String locale = await Devicelocale.currentLocale;
full code
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:devicelocale/devicelocale.dart';
void main() => runApp(MyApp());
/// Demo getting a device locale
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
List _languages = List();
String _locale;
@override
void initState() {
super.initState();
initPlatformState();
}
// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initPlatformState() async {
List languages;
String currentLocale;
// Platform messages may fail, so we use a try/catch PlatformException.
try {
languages = await Devicelocale.preferredLanguages;
print(languages);
} on PlatformException {
print("Error obtaining preferred languages");
}
try {
currentLocale = await Devicelocale.currentLocale;
print(currentLocale);
} on PlatformException {
print("Error obtaining current locale");
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;
setState(() {
_languages = languages;
_locale = currentLocale;
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: Center(
child: Column(
children: <Widget>[
Text("Current locale: "),
Text('$_locale'),
Text("Preferred Languages: "),
Text(_languages.toString()),
],
)
),
),
);
}
}
