无法在Flutter TabBarView中本地化字符串 [英] Cannot localize strings in Flutter TabBarView

问题描述

当我尝试在TabBarView中本地化字符串时，出现此错误:

When I try to localize a string in a TabBarView I get this error:

NoSuchMethodError:方法"translate"在null上被调用.接收者:null.尝试调用:translate("username).

NoSuchMethodError: The method 'translate' was called on null. Receiver: null. Tried calling: translate("username).

我使用以下代码行将键转换为本地化字符串:

I use this line of code to translate a key to a localized string:

AppLocalizations.of(context).translate('username')

此功能在我的应用程序的所有其他屏幕(除了此屏幕)上都很好用.有谁知道为什么它不起作用以及如何解决?

This works great in all the other screens of my app except this one. Does anyone know why it's not working and how to solve it?

我已经尝试过的一些事情:

Some things I already tried:

• 传递主屏幕(包含所有TabBarView的屏幕)的上下文

• pass the context of the main screen (the screen that holds all the TabBarViews)

在构建器中包装每个ListTile

wrap every ListTile in a Builder

将ListView包装在构建器中

wrap the ListView in a Builder

代码:

class AccountScreen extends StatelessWidget {
  final String username;
  final String email;
  final int points;

  AccountScreen(this.username, this.email, this.points);

  @override
  Widget build(BuildContext context) {
    return Container(
      child: Padding(
        padding: EdgeInsets.all(10),
        child: ListView(
          children: <Widget>[
            ListTile(
              title: Text(AppLocalizations.of(context).translate('username')),
              subtitle: Text(username),
            ),
            ListTile(
              title:
                  Text(AppLocalizations.of(context).translate('email_address')),
              subtitle: Text(email),
            ),
            ListTile(
              title: Text(AppLocalizations.of(context).translate('points')),
              subtitle: Text('$points'),
            ),
          ],
        ),
      ),
    );
  }
}

推荐答案

问题是应用内有多个MaterialApp小部件，这些小部件引起了有关本地化过程的冲突.删除冗余的MaterialApp小部件可解决此问题.

The problem was that there were multiple MaterialApp widgets inside the app that were causing some conflicts regarding the localisation process. Removing the Redundant MaterialApp widgets fixed the issue.

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