探索 Flutter TTS：赋予 Flutter 应用语音合成的魅力

import 'package:flutter/material.dart';
import 'package:flutter_tts/flutter_tts.dart';
 
class TextToSpeechDemo extends StatefulWidget {
  @override
  _TextToSpeechDemoState createState() => _TextToSpeechDemoState();
}
 
class _TextToSpeechDemoState extends State<TextToSpeechDemo> {
  FlutterTts flutterTts = FlutterTts();
  String _speech = '';
 
  @override
  void dispose() {
    super.dispose();
    flutterTts.stop();
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter TTS 示例'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(20.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            TextField(
              onChanged: (text) {
                setState(() {
                  _speech = text;
                });
              },
              decoration: InputDecoration(
                border: OutlineInputBorder(),
                hintText: '输入文本',
              ),
            ),
            RaisedButton(
              onPressed: () {
                flutterTts.setLanguage("zh-CN");
                flutterTts.speak(_speech);
              },
              child: Text('合成语音'),
            ),
          ],
        ),
      ),
    );
  }
}

这段代码演示了如何在Flutter应用中集成Flutter TTS插件，实现文本转语音功能。用户可以在文本框输入文本，点击按钮后，文本将通过语音合成器读出。代码中使用FlutterTts类来控制语音合成，并在dispose方法中确保当控件卸载时停止语音播放。