devicelocale 0.4.0

A Flutter package that can be used to extract the locales that are currently defined on a device with the current locale set as the first in the list.

example/lib/main.dart

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 = [];
  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 != null) ? languages : "unable to get preferred languages");
    } on PlatformException {
      print("Error obtaining preferred languages");
    }
    try {
      currentLocale = await Devicelocale.currentLocale;
      print( (currentLocale != null) ? currentLocale : "Unable to get 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()),
              Padding(
                padding: EdgeInsets.all(10),
                child: ElevatedButton(
                  onPressed: () {
                    listLanguages();
                  },
                  child: Text("Run Test")
                ),
              ),
              Padding(
                padding: EdgeInsets.all(10),
                child: ElevatedButton(
                  onPressed: () async {
                    await testAsLocale();
                    await testLanguagesAsLocales();
                  },
                  child: Text("Test currentAsLocale"),
                ),
              ),


            ],
          )
        ),
      ),
    );
  }

  /// Show the use of the currentAsLocale Function
  Future <void> testAsLocale() async {
    Locale? l = await Devicelocale.currentAsLocale;
    if(l != null){
      print("CurrentAsLocale result: Language Code: ${l.languageCode} , Country Code: ${l.countryCode}");
    } else {
      print('Unable to determine currentAsLocale');
    }
  }


  /// Show the use of the preferredLanguagesAsLocale Function
  Future <void> testLanguagesAsLocales() async {
    List <Locale>  languageLocales = await Devicelocale.preferredLanguagesAsLocales;
    print(languageLocales);
    print("Preferred languagesAsLocales:");
    languageLocales.forEach((l) { 
      print("- Language Code: ${l.languageCode} , Country Code: ${l.countryCode}");     
    });

  }

  /// testing for issue-12
  Future <void> listLanguages() async {
    List? languages = await Devicelocale.preferredLanguages;
    String? locale = await Devicelocale.currentLocale;
    if(locale != null){
      print('current locale: $locale');
    }
    if(languages != null){
      print('preferred device languages:');
      languages.forEach((l) => print(' - $l'));
    }
  }

}