AppLocal.dart

Purpose 

This file implements Flutter localization using a custom AppLocalizations class and a corresponding LocalizationsDelegate. It provides localized strings for English and Spanish, allowing the HealthyWear app to display UI elements in multiple languages.

Localization Entry Point 

class AppLocalizations {
  final Locale locale;
  AppLocalizations(this.locale);

Holds the current locale.
Serves as the lookup class for localized values.

Supported Locales 

static const List<Locale> supportedLocales = [
  Locale('en', ''),
  Locale('es', ''),
];

These define which languages the app supports.

Localization Delegate 

static const LocalizationsDelegate<AppLocalizations> delegate = AppLocalizationsDelegate();

Used in MaterialApp to load localized content via AppLocalizationsDelegate.

Localized Values 

static Map<String, Map<String, String>> _localizedValues = {
  'en': {'title': 'Healthy Wear', 'id_number': 'ID Number'},
  'es': {'title': 'HealthyWear ', 'id_number': 'Número de Referencia'},
};

Stores translatable strings keyed by language code ('en', 'es').
Custom method translate(String key) fetches translations dynamically.

Translation Accessors 

String get title
String get idNumber

Convenient property-style access for common fields in the app.

Usage 

Use anywhere in a widget tree:

AppLocalizations.of(context)?.translate('title')
AppLocalizations.of(context)?.idNumber

Custom Localization Delegate 

class AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations>

Defines how AppLocalizations is loaded.

Key Methods:

isSupported(): Checks if the locale is supported
load(): Loads the AppLocalizations instance
shouldReload(): Controls delegate rebuild behavior (always false)

Integration in Flutter App 

You should wire this into your MaterialApp like so:

MaterialApp(
  localizationsDelegates: [
    AppLocalizations.delegate,
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
    GlobalCupertinoLocalizations.delegate,
  ],
  supportedLocales: AppLocalizations.supportedLocales,
)

This will enable multilingual support in your HealthyWear app.