Flutter OTA Localization example

Libraries

• Flutter Intl
• Intl Translation

Backend implementation

• Endpoint get Json

Frontend implementation

MessageLookup

• Create class AppMessageLookupProxy extends MessageLookup
• Override lookupMessage function to get string from json which was fetched from Backend

AppLocalizations

• Run command intl_translation:generate_from_arb to generate language file (.dart)

AppLocalizationsDelegate

• shouldReload : compare request time, if having new request => return true to trigger reload
• load : inject AppMessageLookupProxy to package:intl/src/intl_helpers.dart . messageLookup

Main

• MaterialApp.locale <- initial locale, set it in future if need to change locale
• MaterialApp.localizationsDelegates <- pass AppLocalizationsDelegate with dynamic l10n data, set it in future if need to reload translation strings

Ref

• https://flutter.dev/docs/development/accessibility-and-localization/internationalization
• http://site.icu-project.org/