How to Internationalize Your Flutter App with the CLI Tool

Sep 14, 2023 | Programming

Ever found yourself frustrated because a tool you relied on is no longer available? You’re not alone. This article walks you through how to use a CLI tool developed for internationalizing Flutter apps, now available in pure Dart. Although the project maintenance has paused, there’s still a valuable tool that can help ease your pain. Let’s dive in!

Understanding the Internationalization Plugin

This plugin helps you internationalize your Flutter application efficiently. It generates the necessary boilerplate code allowing you to add and organize strings in files contained within the res/values folder. Inspired by the Internationalizing Flutter Apps tutorial, this tool leverages strings effectively to accommodate various languages.

Step-by-step Setup

1. Set Up Your App

First, configure your localizationsDelegates and supportedLocales to enable access to the internationalized strings.

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      onGenerateTitle: (BuildContext context) => S.of(context).app_name,
      localizationsDelegates: const >[
        S.delegate,
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
      ],
      supportedLocales: S.delegate.supportedLocales,
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

Think of setting up your app like preparing a language buffet: you assemble the necessary ingredients (localizations) and set the table (configure delegates) to accommodate a variety of diners (locales).

2. Set Up the ARB Files

ARB files stand for Application Resource Bundle and are utilized for storing localized strings in JSON format. Here’s how to create them:

  • Right-click on the values folder
  • Select New -> ARB File
  • Choose your preferred language and region

Each ARB file will then correlate its resource IDs to localized values. For instance, material_de.arb contains German translations.

3. Utilize Strings Effectively

As you begin using these localized strings in your app, remember:

  • String keys from ARB files are valid Dart variable names.
  • Parameterized strings allow for customizable outputs, e.g., S.of(context).aboutListTileTitle(yourAppTitle).
  • Provide plural translations for different quantities using specific suffixes like Zero, One, Two, and Other.

4. Configuring Plugin Activation

With the release of version 1.1.0, you can toggle the plugin’s activation in your pubspec.yaml file:

flutter_i18n:
  enable-flutter-i18n: true
  enable-for-dart: false

Think of this process as flipping a switch: you control whether the tool is active based on your project needs.

Troubleshooting Ideas

If you encounter issues while setting up or using the CLI tool, consider the following:

  • Ensure all your ARB files are properly linked to the English file; missing IDs will cause issues.
  • Double-check the configurations in your pubspec.yaml to ensure the right options are activated for your project type.
  • Look out for typos in the string keys, as these can lead to runtime errors.

If the tool does not work as expected or if you have further questions, don’t hesitate to reach out in the community for additional support. For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

Even though this project is no longer maintained and you might feel a bit lost, remember that this CLI tool can still significantly help you in internationalizing your Flutter app. At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.

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