Flutter中文繁简转换插件flutter_opencc_ffi_web的使用

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Flutter中文繁简转换插件flutter_opencc_ffi_web的使用

简介

flutter_opencc_ffi_web 是一个用于在 Flutter 应用中进行中文繁简体转换的插件。该插件基于 flutter_opencc_ffi，并特别针对 Web 平台进行了适配。

安装

首先，在你的 pubspec.yaml 文件中添加依赖项：

dependencies:
  flutter_opencc_ffi_web: ^0.0.1

然后运行 flutter pub get 来安装插件。

使用示例

以下是一个完整的示例代码，展示了如何在 Flutter 应用中使用 flutter_opencc_ffi_web 插件进行中文繁简转换。

import 'package:flutter/material.dart';
import 'package:flutter_opencc_ffi_web/flutter_opencc_ffi_web.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter 中文繁简转换'),
        ),
        body: Center(
          child: ConversionWidget(),
        ),
      ),
    );
  }
}

class ConversionWidget extends StatefulWidget {
  @override
  _ConversionWidgetState createState() => _ConversionWidgetState();
}

class _ConversionWidgetState extends State<ConversionWidget> {
  final TextEditingController _controller = TextEditingController();
  String _simplifiedText = '';
  String _traditionalText = '';

  Future<void> _convertText() async {
    // 获取输入框中的文本
    String text = _controller.text;

    // 创建 OpenCC 实例
    OpenCC openCC = OpenCC();

    // 转换为简体字
    String simplified = await openCC.convertToSimplified(text);
    setState(() {
      _simplifiedText = simplified;
    });

    // 转换为繁体字
    String traditional = await openCC.convertToTraditional(text);
    setState(() {
      _traditionalText = traditional;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        TextField(
          controller: _controller,
          decoration: InputDecoration(
            labelText: '请输入中文文本',
            border: OutlineInputBorder(),
          ),
        ),
        SizedBox(height: 20),
        ElevatedButton(
          onPressed: _convertText,
          child: Text('转换为简体'),
        ),
        SizedBox(height: 20),
        Text(
          '简体字: $_simplifiedText',
          style: TextStyle(fontSize: 18),
        ),
        SizedBox(height: 20),
        ElevatedButton(
          onPressed: () {
            setState(() {
              _controller.text = _simplifiedText; // 将简体字作为新的输入
            });
            _convertText();
          },
          child: Text('转换为繁体'),
        ),
        SizedBox(height: 20),
        Text(
          '繁体字: $_traditionalText',
          style: TextStyle(fontSize: 18),
        ),
      ],
    );
  }
}

代码解释

• 导入必要的包：

  import 'package:flutter/material.dart';
  import 'package:flutter_opencc_ffi_web/flutter_opencc_ffi_web.dart';
  

• 创建主应用类 MyApp：

  void main() {
    runApp(MyApp());
  }
  
  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: Text('Flutter 中文繁简转换'),
          ),
          body: Center(
            child: ConversionWidget(),
          ),
        ),
      );
    }
  }
  

• 创建 ConversionWidget 类：

  class ConversionWidget extends StatefulWidget {
    @override
    _ConversionWidgetState createState() => _ConversionWidgetState();
  }
  

• 实现 _ConversionWidgetState 类：

  class _ConversionWidgetState extends State<ConversionWidget> {
    final TextEditingController _controller = TextEditingController();
    String _simplifiedText = '';
    String _traditionalText = '';
  
    Future<void> _convertText() async {
      // 获取输入框中的文本
      String text = _controller.text;
  
      // 创建 OpenCC 实例
      OpenCC openCC = OpenCC();
  
      // 转换为简体字
      String simplified = await openCC.convertToSimplified(text);
      setState(() {
        _simplifiedText = simplified;
      });
  
      // 转换为繁体字
      String traditional = await openCC.convertToTraditional(text);
      setState(() {
        _traditionalText = traditional;
      });
    }
  
    @override
    Widget build(BuildContext context) {
      return Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          TextField(
            controller: _controller,
            decoration: InputDecoration(
              labelText: '请输入中文文本',
              border: OutlineInputBorder(),
            ),
          ),
          SizedBox(height: 20),
          ElevatedButton(
            onPressed: _convertText,
            child: Text('转换为简体'),
          ),
          SizedBox(height: 20),
          Text(
            '简体字: $_simplifiedText',
            style: TextStyle(fontSize: 18),
          ),
          SizedBox(height: 20),
          ElevatedButton(
            onPressed: () {
              setState(() {
                _controller.text = _simplifiedText; // 将简体字作为新的输入
              });
              _convertText();
            },
            child: Text('转换为繁体'),
          ),
          SizedBox(height: 20),
          Text(
            '繁体字: $_traditionalText',
            style: TextStyle(fontSize: 18),
          ),
        ],
      );
    }
  }