AppLocalizer

AppLocalizer manages the apps locale. At startup it is taken from the platform, but can be overwritten from a persistence storage like SharedPreferences.

App locale can be changed both from within the app (with LanguageChooser) and from platform settings (internal listener).

Translating strings can easily be done with Translator.

There are also choosers for country and currency. All choosers can display flags.

Languages

A Language is a a thin wrapper around Locale and a plain Dart class providing:

• code - 2 lowercase characters according to ISO-639
• countryCode - ISO-3166 alpha-2 for the main country where this language is spoken
• name - localized name of the language

Languages provides the list of all languages.

A special language with code "xx" and countryCode "XX" represents the current platform language.

LanguageChooser allows selection of a language both from the whole list or a subset. A special selection for the platform locale can be included.

Countries

A Country is a plain Dart class providing:

• alpha2 → ISO-3166 alpha-2 code
• alpha3 → ISO-3166 alpha-3 code
• num3 → ISO-3166 numerical code
• name → country name in countries native language
• predial → international phone pre-dial
• language → official language in the country
• currency → official currency in the country
• timezone → offset to UTC

Countries provides the list of all countries.

CountryChooser allows selection of a country both from the whole list or from a subset.

Currencies

A Currency is a plain Dart class providing:

• code → three uppercase characters according to ISO-4217
• minor → number of digits for minor currency (e.g. Cents)
• name → the native name of the currency
• symbol → currency symbol (requires a UTF-8 font which contains currency symbols)

Currencies provides the list of all countries.

CurrencyChooser allows selection of a currency both from the whole list or a subset.

Example

Please run example from the package to see all available features.

Use this code to have AppLocalizer taking care of the active locale for the app:

/// List of locales supported by your app. defaultLocale is "en"
List<Locale> supportedLocales = [
  AppLocalizer.defaultLocale,
  Locale('de', 'DE'),
  Locale('es', 'ES'),
];

  Widget build(BuildContext context) {
    return ValueListenableBuilder<Locale>(
      valueListenable: AppLocalizer.initialize(
        supportedLocales: supportedLocales,
      ).notifier,
      builder: (BuildContext context, Locale locale, Widget? child) =>
          MaterialApp(
        // --- builder is used here to set 24hour format. Can be omitted.
        builder: (BuildContext context, Widget? child) => MediaQuery(
            data: MediaQuery.of(context).copyWith(alwaysUse24HourFormat: true),
            child: child!),
        home: MyHomePage(),
        localeListResolutionCallback: (List<Locale>? devLocales,
                Iterable<Locale> appLocales) =>
            AppLocalizer()
                .localeListResolutionCallback(context, devLocales, appLocales),
        localizationsDelegates: [
          GlobalMaterialLocalizations.delegate,
          GlobalWidgetsLocalizations.delegate,
          GlobalCupertinoLocalizations.delegate,
        ],
        supportedLocales: supportedLocales,
        ...