Using Easy Localization witout context #210

Overman775 · 2020-06-23T07:34:54Z

No description provided.

pumuckelo · 2020-07-11T09:35:57Z

@Overman775 Hi Overmann, did you find a workaround to use localization outside of widgets?

Overman775 · 2020-07-11T09:45:23Z

@pumuckelo nope, have an idea, I’ll implement it later

ncuillery · 2020-07-28T18:16:32Z

Isn't that already done?

I see a tr function in public.dart that can be called without context argument.

VictorCamargo · 2020-08-02T18:23:24Z

That would be very helpful.

chunlee-thong · 2020-08-08T11:26:14Z

@ncuillery even tr function doesn't need context but using tr outside the widget tree doesn't work

6h4n3m · 2020-08-12T14:45:06Z

@ncuillery even tr function doesn't need context but using tr outside the widget tree doesn't work

Can you provide an example of your code and the errors you're getting? because the static tr() function works fine outside widget trees.

pumuckelo · 2020-08-12T17:00:11Z

but how does it get access to the language files

Overman775 · 2021-02-10T06:47:35Z

@aissat #321 may be delete Localization.of(context) from public.dart ?

Overman775 · 2021-02-20T18:24:23Z

context removed from tr() and plural() in PR #343

jonasN5 · 2021-03-23T18:08:38Z

Can someone give an implementation example?
The only way I can think of at the moment is:

Create an instance of EasyLocalizationController
Call controller.loadTranslations()
Create an instance of Localization
Call localization.load(translations)
Translate with localization.tr
That would also mean exposing EasyLocalizationController and Translations and Localization.

jonasN5 · 2021-03-24T19:20:29Z

I finally got it to work. Someone should document the following somewhere, because it definitely is not currently.
First off: findSystemLocale() will not work when called from an isolate in the background. Don't ask me why, I just had to debug that to find out it is the case. This is important, because therefore EasyLocalizationController.deviceLocale will not be set.
Thus, you have to use the following code from an isolate:

Step 1:

Call context.resetLocale(); somewhere in MyApp.build(), because the currently documented saveLocale will not save anything anywhere. Calling resetLocale will actually save the deviceLocale to SharedPreferences, which we can retrieve even in an isolate.

Step 2: code executed in the isolate

import 'package:easy_localization/src/easy_localization_controller.dart';
import 'package:easy_localization/src/localization.dart';

  /// A manually created instance of Localization to enable translating without context.
  final Localization L = Localization.instance;

/// Method to load translations since context is not available in isolate.
Future<void> loadTranslations() async {

  //this will only set EasyLocalizationController.savedLocale
  await EasyLocalizationController.initEasyLocation();

  final controller = EasyLocalizationController(
    saveLocale: true, //mandatory to use EasyLocalizationController.savedLocale
    fallbackLocale: AppConstants.SUPPORTED_LOCALES[0],
    supportedLocales: AppConstants.SUPPORTED_LOCALES,
    assetLoader: const RootBundleAssetLoader(),
    useOnlyLangCode: false,
    useFallbackTranslations: true,
    path: AppConstants.LOCALIZATION_ASSET_PATH,
    onLoadError: (FlutterError e) {
    },
  );

  //Load translations from assets
  await controller.loadTranslations();

  //load translations into exploitable data, kept in memory
  Localization.load(controller.locale, translations: controller.translations, fallbackTranslations: controller.fallbackTranslations);
}

Step 3: now you can actually translate

L.tr(you_string_key);

TarekMedhat · 2021-05-19T15:47:21Z

I finally got it to work. Someone should document the following somewhere, because it definitely is not currently.
First off: findSystemLocale() will not work when called from an isolate in the background. Don't ask me why, I just had to debug that to find out it is the case. This is important, because therefore EasyLocalizationController.deviceLocale will not be set.
Thus, you have to use the following code from an isolate:

Step 1:

Call context.resetLocale(); somewhere in MyApp.build(), because the currently documented saveLocale will not save anything anywhere. Calling resetLocale will actually save the deviceLocale to SharedPreferences, which we can retrieve even in an isolate.

Step 2: code executed in the isolate
import 'package:easy_localization/src/easy_localization_controller.dart';
import 'package:easy_localization/src/localization.dart';
  /// A manually created instance of Localization to enable translating without context.
  final Localization L = Localization.instance;
/// Method to load translations since context is not available in isolate.
Future<void> loadTranslations() async {

  //this will only set EasyLocalizationController.savedLocale
  await EasyLocalizationController.initEasyLocation();

  final controller = EasyLocalizationController(
    saveLocale: true, //mandatory to use EasyLocalizationController.savedLocale
    fallbackLocale: AppConstants.SUPPORTED_LOCALES[0],
    supportedLocales: AppConstants.SUPPORTED_LOCALES,
    assetLoader: const RootBundleAssetLoader(),
    useOnlyLangCode: false,
    useFallbackTranslations: true,
    path: AppConstants.LOCALIZATION_ASSET_PATH,
    onLoadError: (FlutterError e) {
    },
  );

  //Load translations from assets
  await controller.loadTranslations();

  //load translations into exploitable data, kept in memory
  Localization.load(controller.locale, translations: controller.translations, fallbackTranslations: controller.fallbackTranslations);
}
Step 3: now you can actually translate

L.tr(you_string_key);

This solution worked but resetLocale saves the deviceLocale and inf deviceLocale wasn't in supportedLocale it will lead to an excpetion (ex: "assets/localizations/fr.json not found").

So instead of using resetLocale I used setLocale(context.locale), this will make sure to save the fallbackLocale instead of deviceLocale if the deviceLocale not supported

nkulic · 2021-07-18T12:24:17Z

I finally got it to work. Someone should document the following somewhere, because it definitely is not currently.
First off: findSystemLocale() will not work when called from an isolate in the background. Don't ask me why, I just had to debug that to find out it is the case. This is important, because therefore EasyLocalizationController.deviceLocale will not be set.
Thus, you have to use the following code from an isolate:

Step 1:

Call context.resetLocale(); somewhere in MyApp.build(), because the currently documented saveLocale will not save anything anywhere. Calling resetLocale will actually save the deviceLocale to SharedPreferences, which we can retrieve even in an isolate.

Step 2: code executed in the isolate
import 'package:easy_localization/src/easy_localization_controller.dart';
import 'package:easy_localization/src/localization.dart';
  /// A manually created instance of Localization to enable translating without context.
  final Localization L = Localization.instance;
/// Method to load translations since context is not available in isolate.
Future<void> loadTranslations() async {

  //this will only set EasyLocalizationController.savedLocale
  await EasyLocalizationController.initEasyLocation();

  final controller = EasyLocalizationController(
    saveLocale: true, //mandatory to use EasyLocalizationController.savedLocale
    fallbackLocale: AppConstants.SUPPORTED_LOCALES[0],
    supportedLocales: AppConstants.SUPPORTED_LOCALES,
    assetLoader: const RootBundleAssetLoader(),
    useOnlyLangCode: false,
    useFallbackTranslations: true,
    path: AppConstants.LOCALIZATION_ASSET_PATH,
    onLoadError: (FlutterError e) {
    },
  );

  //Load translations from assets
  await controller.loadTranslations();

  //load translations into exploitable data, kept in memory
  Localization.load(controller.locale, translations: controller.translations, fallbackTranslations: controller.fallbackTranslations);
}
Step 3: now you can actually translate

L.tr(you_string_key);

I am trying to implement your code but getting error Null check operator used on a null value pointing to context.resetLocale() method that I'm calling inside build() method

final Localization L = Localization.instance;

Future<void> loadTranslations() async {...}

Future main() async {
  await loadTranslations();

  // await EasyLocalization.ensureInitialized();
  runApp(
    App(store: store)
    
    // EasyLocalization(
    //   path: 'assets/translations',
    //   assetLoader: CodegenLoader(),
    //   supportedLocales: [
    //     Locale('en', 'US'),
    //     Locale('hr', 'HR'),
    //   ],
    //   child: App(store: store),
    // ),
    
   //.... 
  @override
  Widget build(BuildContext context) {
    context.resetLocale(); // error pointing here

Fintasys · 2021-07-23T01:48:14Z

I had the same issue as @nkulic and I had to change the assetLoader because I use CodeGen.

  import 'package:weddy/gen/codegen_loader.g.dart';
  ...
  assetLoader: const CodegenLoader(),

and I could remove context.resetLocale(); it wasn't necessary anymore.

nkulic · 2021-07-23T08:47:29Z

I had the same issue as @nkulic and I had to change the assetLoader because I use CodeGen.
  import 'package:weddy/gen/codegen_loader.g.dart';
  ...
  assetLoader: const CodegenLoader(),
and I could remove context.resetLocale(); it wasn't necessary anymore.

I ended up using a very recent and new package fast_i18n

dmrcierhn · 2022-06-12T11:51:44Z

I finally got it to work. Someone should document the following somewhere, because it definitely is not currently. First off: findSystemLocale() will not work when called from an isolate in the background. Don't ask me why, I just had to debug that to find out it is the case. This is important, because therefore EasyLocalizationController.deviceLocale will not be set. Thus, you have to use the following code from an isolate:

Step 1:

Call context.resetLocale(); somewhere in MyApp.build(), because the currently documented saveLocale will not save anything anywhere. Calling resetLocale will actually save the deviceLocale to SharedPreferences, which we can retrieve even in an isolate.

Step 2: code executed in the isolate
import 'package:easy_localization/src/easy_localization_controller.dart';
import 'package:easy_localization/src/localization.dart';
  /// A manually created instance of Localization to enable translating without context.
  final Localization L = Localization.instance;
/// Method to load translations since context is not available in isolate.
Future<void> loadTranslations() async {

  //this will only set EasyLocalizationController.savedLocale
  await EasyLocalizationController.initEasyLocation();

  final controller = EasyLocalizationController(
    saveLocale: true, //mandatory to use EasyLocalizationController.savedLocale
    fallbackLocale: AppConstants.SUPPORTED_LOCALES[0],
    supportedLocales: AppConstants.SUPPORTED_LOCALES,
    assetLoader: const RootBundleAssetLoader(),
    useOnlyLangCode: false,
    useFallbackTranslations: true,
    path: AppConstants.LOCALIZATION_ASSET_PATH,
    onLoadError: (FlutterError e) {
    },
  );

  //Load translations from assets
  await controller.loadTranslations();

  //load translations into exploitable data, kept in memory
  Localization.load(controller.locale, translations: controller.translations, fallbackTranslations: controller.fallbackTranslations);
}
Step 3: now you can actually translate

L.tr(you_string_key);

i have a similar problem and i tried this solution but im getting an error "MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)".

await EasyLocalizationController.initEasyLocation(); when this line is work i get this error. how can i solve this?

Musta-Pollo · 2022-08-08T07:46:48Z

Thanks a lot for your help. It worked for me ❤️.

I wanted to get working translations in the background thread when using awesome_notifications—adding this to execute in the background thread when the main thread is dead worked for me.

await EasyLocalization.ensureInitialized();
      final controller = EasyLocalizationController(
        saveLocale: true,
        fallbackLocale: const Locale('en'),
        supportedLocales: const [
          Locale('en'),
          Locale('cs'),
        ],
        assetLoader: const CodegenLoader(),
        useOnlyLangCode: false,
        useFallbackTranslations: true,
        path: '/assets/translations/',
        onLoadError: (FlutterError e) {},
      );

      //Load translations from assets
      await controller.loadTranslations();

      //load translations into exploitable data, kept in memory
      Localization.load(controller.locale,
          translations: controller.translations,
          fallbackTranslations: controller.fallbackTranslations);

And then this worked normally: LocaleKeys.notifications_your_quote.tr()

In context:

static Future<void> onActionReceivedMethod(
      ReceivedAction receivedAction) async {
    SendPort? port = IsolateNameServer.lookupPortByName('main');

    if (port != null) {
      port.send(receivedAction);
    } else {
      if ((UniversalPlatform.isAndroid || UniversalPlatform.isIOS)) {
        var quotesData = data;
        if (await getLocaleIndex() == 1) {
          quotesData = data_cz;
        }
        parseAllQuotes(quotesData).then((value) => quotesProvider = value);
      }
      await Hive.initFlutter();
      Hive.registerAdapter(HabitAdapter());
      Hive.registerAdapter(RewardAdapter());
      Hive.registerAdapter(QuoteAdapter());
      await Hive.openBox<Habit>(habitsBoxName);
      await Hive.openBox(settingsBoxName);
      await Hive.openBox<Reward>(rewardsBoxName);
      await Hive.openBox<Quote>(favouriteQuotesBoxName);
      await EasyLocalization.ensureInitialized();
      final controller = EasyLocalizationController(
        saveLocale: true,
        fallbackLocale: const Locale('en'),
        supportedLocales: const [
          Locale('en'),
          Locale('cs'),
        ],
        assetLoader: const CodegenLoader(),
        useOnlyLangCode: false,
        useFallbackTranslations: true,
        path: '/assets/translations/',
        onLoadError: (FlutterError e) {},
      );

      //Load translations from assets
      await controller.loadTranslations();

      //load translations into exploitable data, kept in memory
      Localization.load(controller.locale,
          translations: controller.translations,
          fallbackTranslations: controller.fallbackTranslations);
      await AwesomeNotifications().initialize(
        'resource://drawable/ic_stat_onesignal_default',
        [
          NotificationChannel(
            channelKey: getChannelNameByType(NotificationSettings.habits),
            channelName: getChannelNameByType(NotificationSettings.habits),
            channelDescription:
                LocaleKeys.notifications_habits_notifications.tr(),
            defaultColor: primaryColor_74,
            ledColor: Colors.blue,
            enableLights: true,
            importance: NotificationImportance.High,
            channelShowBadge: true,
          ),
          NotificationChannel(
            channelKey: getChannelNameByType(NotificationSettings.quotes),
            channelName: getChannelNameByType(NotificationSettings.quotes),
            importance: NotificationImportance.Default,
            channelDescription:
                LocaleKeys.notifications_quotes_notifications.tr(),
            defaultColor: secondaryColorGreen_43,
            ledColor: Colors.green,
          ),
          NotificationChannel(
            channelKey: getChannelNameByType(NotificationSettings.rewards),
            channelName: getChannelNameByType(NotificationSettings.rewards),
            importance: NotificationImportance.Default,
            channelDescription:
                LocaleKeys.notifications_rewards_notifications.tr(),
            defaultColor: Colors.black,
            ledColor: Colors.green,
          ),
        ],
        // debug: true,
      );
      await doneHabit(receivedAction);
    }
  }

bw-flagship · 2023-05-13T06:18:03Z

Looks like we don't need code here, but just add one of the solutions to the documentation and maybe to the example

armandsLa · 2024-04-29T12:13:52Z

It's not necessary to always load the Localization when running in isolate. The instance can now be passed as an input parameter. The only situation when it's required to load Localization is when running from another Dart entry point.

Import Localization class:
import 'package:easy_localization/src/localization.dart';

Pass the Localization.instance as input parameter:
await compute(methodToRun, Localization.instance);

Get the translation:
localization.tr(<key>)

@bw-flagship it would be great if Localization could be accessible without the need to import it specifically.

bw-flagship · 2024-04-29T12:21:51Z

I see, thanks for the explanation! Feel free to open a pr :)

Mistic92 · 2024-05-16T09:16:13Z

Hi, I'm trying to use EasyLocalization with WorkManager. When I try method with using EasyLocalizationController looks like there is no such class. Is this solution up to date?

bw-flagship · 2024-05-16T09:34:41Z

@Mistic92 This solution is up-to-date, but I have no experience with work manager and can't tell you if this should work out of the box

Mistic92 · 2024-05-16T09:36:19Z

@bw-flagship it worked, I had to explicitly import from

import 'package:easy_localization/src/localization.dart';
import 'package:easy_localization/src/easy_localization_controller.dart';

as Android Studio didn't want to import from that location. Even now I'm getting warning but solution works

Import of a library in the 'lib/src' directory of another package. (Documentation)  Try importing a public library that exports this library, or removing the import.

bw-flagship · 2024-05-16T10:26:47Z

@Mistic92 got it. Then #669 will work for you. However, it seems like it's not worked on at the moment

hasanm08 · 2024-08-21T09:50:32Z

use this to solve
#407 (comment)

Overman775 added the enhancement New feature or request label Jun 23, 2020

aissat pinned this issue Nov 25, 2020

jonasN5 mentioned this issue Mar 24, 2021

Expose components to allow translating without context #365

Closed

AhmetMelihSerter mentioned this issue Apr 11, 2021

Usage in background/isolate #198

Closed

Fintasys mentioned this issue Jul 23, 2021

Translation of Push-Notification #407

Closed

Geparder mentioned this issue Feb 7, 2024

How to use in isolate? #645

Closed

Flajt mentioned this issue Mar 17, 2024

Fix notification issue Flajt/decentproof-app#121

Merged

armandsLa mentioned this issue Apr 30, 2024

Export localization #669

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Using Easy Localization witout context #210

Using Easy Localization witout context #210

Overman775 commented Jun 23, 2020

pumuckelo commented Jul 11, 2020

Overman775 commented Jul 11, 2020

ncuillery commented Jul 28, 2020

VictorCamargo commented Aug 2, 2020

chunlee-thong commented Aug 8, 2020

6h4n3m commented Aug 12, 2020

pumuckelo commented Aug 12, 2020

Overman775 commented Feb 10, 2021

Overman775 commented Feb 20, 2021

jonasN5 commented Mar 23, 2021

jonasN5 commented Mar 24, 2021 •

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TarekMedhat commented May 19, 2021

nkulic commented Jul 18, 2021 •

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Fintasys commented Jul 23, 2021 •

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nkulic commented Jul 23, 2021 •

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dmrcierhn commented Jun 12, 2022

Musta-Pollo commented Aug 8, 2022

bw-flagship commented May 13, 2023

armandsLa commented Apr 29, 2024 •

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bw-flagship commented Apr 29, 2024

Mistic92 commented May 16, 2024

bw-flagship commented May 16, 2024

Mistic92 commented May 16, 2024

bw-flagship commented May 16, 2024

hasanm08 commented Aug 21, 2024

Using Easy Localization witout context #210

Using Easy Localization witout context #210

Comments

Overman775 commented Jun 23, 2020

pumuckelo commented Jul 11, 2020

Overman775 commented Jul 11, 2020

ncuillery commented Jul 28, 2020

VictorCamargo commented Aug 2, 2020

chunlee-thong commented Aug 8, 2020

6h4n3m commented Aug 12, 2020

pumuckelo commented Aug 12, 2020

Overman775 commented Feb 10, 2021

Overman775 commented Feb 20, 2021

jonasN5 commented Mar 23, 2021

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TarekMedhat commented May 19, 2021

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dmrcierhn commented Jun 12, 2022

Musta-Pollo commented Aug 8, 2022

bw-flagship commented May 13, 2023

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Mistic92 commented May 16, 2024

bw-flagship commented May 16, 2024

Mistic92 commented May 16, 2024

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hasanm08 commented Aug 21, 2024

jonasN5 commented Mar 24, 2021 •

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nkulic commented Jul 18, 2021 •

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