CODEWITHSUNDEEP
flutterdartlocalization
Michał J. Gąsior
Michał J. Gąsior

Reputation: 1669

Flutter ARB localization throws "the getter was called on null" error

Following the tips of the official internationalization tutorial I am getting the The getter was called on null when trying to use the autogenerated from ARB files translation engine (AppLocalizations.of(context).helloWrold):

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

class Login extends StatelessWidget {
  final loginAction;
  final String loginError;

  const Login(this.loginAction, this.loginError);

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        RaisedButton(
          onPressed: () {
            loginAction();
          },
          child: Text(AppLocalizations.of(context).helloWorld),
        ),
        Text(loginError ?? ''),
      ],
    );
  }
}

Upvotes: 0

Views: 746

Answers (1)

Michał J. Gąsior
Michał J. Gąsior

Reputation: 1669

The solution to this problem is a missing part of the official tutorial. It is not described there that to allow the engine to function, one needs to declare additional delegate in the main.dart file. This can be concluded out of the example GitHub repository. To fix the issue, go to the MaterialApp and add the missing delegate AppLocalizations.delegate:

import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:flutter_localizations/flutter_localizations.dart';


      child: MaterialApp(
          localizationsDelegates: [
            // ... app-specific localization delegate[s] here
            AppLocalizations.delegate,
            GlobalMaterialLocalizations.delegate,
            GlobalWidgetsLocalizations.delegate,
            GlobalCupertinoLocalizations.delegate,
          ],
          supportedLocales: [
            const Locale('en', ''),
            const Locale('pl', '')
          ],
          home: Scaffold(

Upvotes: 8

Related Questions