I need to use CupertinoDatePicker, however its date formatting is mm-dd-yyyy, which in fact is not common for a specific location, where my app will be distributed. I would like to change the format to dd-mm-yyyy, which IMO seems more general.
Is that possible, using that picker?
EDIT: It should be possible in Flutter version 1.7
According to the CupertinoDatePicker documentation:
the class will display its children as
consecutive columns. Its children order is based on
internationalization.
You can read more about internationalization Flutter apps here.
You need to add this to your pubspec.yaml file:
dependencies:
flutter_localizations:
sdk: flutter
And then in your root widget add proper localizationsDelegates:
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'My Application',
localizationsDelegates: [
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
supportedLocales: [
const Locale('en', ''),
const Locale('fr', ''),
],
home: Scaffold(
body: Container(),
),
);
}
}
If you'll use in app one of the localizations that supports dd-mm-yyyy format, e.g. UK English, and you'll have this language set on your device, you should see this widget changed accordingly.
Related
I'm using
import 'package:flutter_localizations/flutter_localizations.dart'; //For Cupertino stuff
import 'package:localization/localization.dart'; //For actual translations
import 'package:intl/intl.dart'; //For locales
to localize my flutter app. It comes up in the language the phone is set to, but I'd like to add a way to change the language within th e app...I tried using LocalJsonLocalization.delegate.load(locale(lang)) from a button (for now; I'd like to use a dropdown list box but that doesn't seem to be null safe yet), but that didn't actually make the change (I saw the debug log and it said it couldn't load the json language file)...
Try wrapping your MaterialApp in a BlocBuilder.
return BlocBuilder<MainBloc, MainState>(
builder: (context, mainState) {
return MaterialApp(
title: 'MyApp',
locale: mainState.locale,
supportedLocales: L10n.all,
localizationsDelegates: [
AppLocalizations.delegate,
GlobalMaterialLocalizations.delegate,
GlobalCupertinoLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
);
Then from your button just call the Bloc Event that will change the state of the locale.
Do not forget to add:
WidgetsFlutterBinding.ensureInitialized();
at the beginning of main() function
It should also work fine using Provider.
I've been trying to solve a couple of problems using both Material and Cupertino widgets.
1) I can't seem to figure out how to globally define a font family for both. Either I use a CupertinoApp and have the Cupertino widgets correct or MaterialApp and have the Material theme widgets correct.
2) How do I define the Cupertino primaryColor attribute without a CupertinoTheme?
I've found something called MaterialBasedCupertinoThemeData but I'm not sure how it works / can't find any docs/tutorials on it.
I can't find any other questions on the subject and would appreciate the help!
#override
Widget build(BuildContext context) {
return CupertinoApp(
title: 'betterfriend',
debugShowCheckedModeBanner: false,
// This lets us use material components
localizationsDelegates: <LocalizationsDelegate<dynamic>>[
DefaultMaterialLocalizations.delegate,
DefaultWidgetsLocalizations.delegate,
DefaultCupertinoLocalizations.delegate,
],
home: CupertinoTheme(
data: MaterialBasedCupertinoThemeData(
materialTheme: ThemeData(textTheme: Styles.textTheme),
),
child: ScreenSwitcher(),
),
);
}
I understand how to add localization to an app by adding localizationsDelegates and supportedLocales to the MaterialApp widget. Localizing my app is working fine.
I'm creating a Flutter package that can be used within other Flutter apps. Some of the widgets within the package need to have localized text, like some of the error messages and button labels. The package contains all of its own localized strings. How can I localize the strings in my package without MaterialApp?
I've used Localizations widget in this way for testing without using a MaterialApp:
A simple demo widget:
class WidgetToTest extends StatelessWidget {
#override
Widget build(BuildContext context) {
//AppLocalizations.of(context)!.hello = 'hello' in generated file
return Text(AppLocalizations.of(context)!.hello);
}
}
The test:
testWidgets('test localizations widget', (tester) async {
await tester.pumpWidget(
Localizations(
locale: const Locale('en'),
delegates: AppLocalizations.localizationsDelegates,
child: WidgetToTest(),
)
);
expect(find.text('hello'), findsOneWidget);
});
You can use Localizations widget if you just need to enable AppLocalizations to work inside your widgets.
I am not able to set localization in my app.
I am trying to add language settings and associated localization in my app. I am able to get-set the language option. I am using 'intl' plug-in for internationalization. My code looks like below in pretty much all the UI .dart files.
AppTranslations.of(context).accountNumber +
" ${accountDetails.accountNumber}",
The getters is set as :
String get accountNumber => _text("account_number");
String _text(String key) {
return _localisedValues[key] ?? _defaultLocaleValues[key];
}
I've also placed json files containing localized labels in 3 different languages. However, it seems there is some instantiation problem of the locazation plug-in. The code doesn't go the getter line.
Any help would be highly appreciated.
AppTranslations.of(context) is a standard way of accessing the localised labels. You are right about the instantiation. If the program doesn't go to the getter line them it means, there's a problem in somewhere in the initial part of the code. It could be in the main.dart.
Check where you are initialising LocalStorageProvider(). In case it is not initialised then that's the problem. Assuming you are using a MaterialApp, try the below suggestion then :
Wrap the MaterialApp with LocalStorageProvider(). I mean, in the main widget build, return LocalStorageProvider() and pass your existing code of MaterialApp() as a child to it. Sample below (Please ignore the theme etc since I just copied the code from one of my app) :
#override
Widget build(BuildContext context) {
LocalStorage localStorage = LocalStorage();
return LocalStorageProvider(
localStorage: localStorage,
child: LocaleProvider(
localStorage: localStorage,
localeWrapper: LocaleWrapper(),
child: Builder(
builder: (context) {
return AnimatedBuilder(
animation: LocaleProvider.of(context).localeWrapper,
builder: (context, _) {
return MaterialApp(
onGenerateTitle: (context) =>
AppTranslations.of(context).appName,
locale: LocaleProvider.of(context).locale,
title: "App Title",
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MapsDemo(),
localizationsDelegates: [
AppTranslationsDelegate(
LocaleProvider.of(context).supportedLanguagesCodes,
),
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
supportedLocales: LocaleProvider.of(context).supportedLocales,
);
},
);
},
),
),
);
}
I want to use one of the predefined localized strings available in the GlobalMaterialLocalizations class. I have added the necessary bits and pieces to my MaterialApp
MaterialApp(
localizationsDelegates: [
const LocalizationDelegate(),
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
supportedLocales: [
const Locale('en', ''),
const Locale('sv', ''),
],
localeResolutionCallback:(Locale locale, Iterable<Locale> supportedLocales) {
return locale; // Return a different locale if the user choose another language in the settings
},
...
and my custom LocalizationDelegate is working fine. I just can't figure out how to use the predefined strings in GlobalMaterialLocalizations, since there is no GlobalMaterialLocalizations.of(BuildContext) method?
Turns out I was looking for the .of(BuildContext) method in the wrong class. To actually use the strings, the MaterialLocalizations class should be used.
Text( MaterialLocalizations.of(context).okButtonLabel )
Hope it might help someone else struggling with the same problem.