相关疑难解决方法(0)

我现在在我的项目中使用 flutter gallary，这是包参考：

import 'package:flutter_gen/gen_l10n/gallery_localizations.dart';

但它显示：

Target of URI doesn't exist: 'package:flutter_gen/gen_l10n/gallery_localizations.dart'.

我在pubspec.yaml：

flutter_localizations:
    sdk: flutter
intl: ^0.16.1
flutter_localized_locales: ^1.1.1

并补充说l10n.yaml：

template-arb-file: intl_en.arb
output-localization-file: gallery_localizations.dart
output-class: GalleryLocalizations
preferred-supported-locales:
  - en
use-deferred-loading: false

我错过了什么吗？仍然无法正常工作，我该怎么做才能使其正常工作？这是完整的代码：

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

enum BottomNavigationDemoType {
  withLabels,
  withoutLabels,
}

class BottomNavigationDemo extends StatefulWidget {
  const BottomNavigationDemo({Key key, @required this.type}) : super(key: key);

  final BottomNavigationDemoType type;

  @override
  _BottomNavigationDemoState createState() => _BottomNavigationDemoState();
}

class _BottomNavigationDemoState extends State<BottomNavigationDemo> {
  int _currentIndex = 0; …