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Flutter Internationalization library based on Json files

json_intl #

Flutter Internationalization library based on Json files

Getting Started #

Add a new asset folder to your pubspec.yaml:

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter
  json_intl: [version]

flutter:
  assets:
    - assets/intl/

Add the translation delegate settings to your MaterialWidget and the list of supported languages:

MaterialApp(
  localizationsDelegates: const [
    JsonIntlDelegate(),
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
  ],
  supportedLocales: const [
    Locale('en'),
    Locale('fr'),
  ],
    home: ...,
);

On iOS, an extra step is necessary: add supported languages to ios/Runner/Info.plist:

<key>CFBundleLocalizations</key>
<array>
    <string>en</string>
    <string>fr</string>
</array>

Create the translation files in assets/intl/:

  • strings.json is the default and fallback file. Any translation not found in another file will be taken here.
  • strings-XX.json one file for each language. strings-fr.json French translations, strings-de.json for German, etc.
  • strings-XX-AA.json can also be used for specific countries, like strings-en-uk.json

Using the translations #

The content of the files is a json dictionary containing a key / value list:

{
    "app_name": "Flutter Demo",
    "increment": "Increment",
    "title": "Flutter Demo Home Page"
}

to get the values in the dart code, use:

JsonIntl.of(context).get('app_name');

or

context.tr('app_name');

Plurals #

The json entry will look like this:

{
    "cart": {
        "one": "{{ count }} item in your Shopping cart",
        "other": "{{ count }} items in your Shopping cart"
    },
}

Other values are supported for specific values depending on the language: "zero", "one", "two", "few", "many", "other"

To use it in the application:

JsonIntl.of(context).count(itemCount, 'cart');

The variable {{ count }} is automatically populated with itemCount.

Gender #

The json entry will look like this:

{
    "child": {
        "male": "The boy",
        "female": "The girl",
        "neutral": "The kid"
    },
}

To use it in the application:

JsonIntl.of(context).gender(JsonIntlGender.female, 'child');

Mixing Plural and Gender #

The json entry will look like this:

{
    "child": {
        "male": {
          "one": "a boy",
          "many": "{{ count }} boys",
        },
        "female": {
          "one": "a girl",
          "many": "{{ count }} girls",
        },
        "neutral": {
          "one": "a child",
          "many": "{{ count }} children",
        }
    },
}

To use it in the application:

JsonIntl.of(context).translate('child', gender: JsonIntlGender.female, count: 3);
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Flutter Internationalization library based on Json files

Repository (GitHub)
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License

unknown (LICENSE)

Dependencies

args, dart_style, flutter, intl, logging, meta, path

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