speechrecognizer 0.0.1

Flutter 语音识别插件，支持 HarmonyOS/OpenHarmony，基于系统 CoreSpeechKit 实现实时语音转文字与麦克风权限管理。

example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:speechrecognizer/speechrecognizer.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  String _recognizedText = '';
  String _statusText = '未开始';
  bool _isListening = false;
  bool _permissionGranted = false;
  final List<String> _logs = [];

  final _speechrecognizerPlugin = Speechrecognizer();

  @override
  void initState() {
    super.initState();
    _initPlugin();
  }

  Future<void> _initPlugin() async {
    // 获取平台版本
    try {
      _platformVersion =
          await _speechrecognizerPlugin.getPlatformVersion() ??
              'Unknown platform version';
    } on PlatformException {
      _platformVersion = 'Failed to get platform version.';
    }

    // 设置语音识别监听
    _speechrecognizerPlugin.setListeners(
      onStart: (result) {
        _addLog('识别开始: sessionId=${result.sessionId}');
        if (mounted) {
          setState(() {
            _statusText = '正在识别...';
            _isListening = true;
          });
        }
      },
      onResult: (result) {
        _addLog('识别结果: "${result.text}" isFinal=${result.isFinal} isLast=${result.isLast}');
        if (mounted) {
          setState(() {
            _recognizedText = result.text;
          });
        }
      },
      onComplete: (result) {
        _addLog('识别完成: sessionId=${result.sessionId} message=${result.message}');
        if (mounted) {
          setState(() {
            _statusText = '识别完成';
            _isListening = false;
          });
        }
      },
      onError: (error) {
        _addLog('识别出错: code=${error.errorCode} msg=${error.errorMessage}');
        if (mounted) {
          setState(() {
            _statusText = '出错: ${error.errorMessage}';
            _isListening = false;
          });
        }
      },
    );

    if (mounted) {
      setState(() {});
    }
  }

  void _addLog(String msg) {
    debugPrint('[SpeechRecognizer] $msg');
    if (mounted) {
      setState(() {
        _logs.insert(0, '${DateTime.now().toString().substring(11, 19)} $msg');
        if (_logs.length > 50) _logs.removeLast();
      });
    }
  }

  Future<void> _requestPermission() async {
    try {
      final granted = await _speechrecognizerPlugin.requestPermission();
      _addLog('权限请求结果: $granted');
      if (mounted) {
        setState(() {
          _permissionGranted = granted;
        });
      }
    } catch (e) {
      _addLog('权限请求异常: $e');
    }
  }

  Future<void> _startRecognition() async {
    setState(() {
      _recognizedText = '';
      _statusText = '启动中...';
    });

    try {
      final sessionId = await _speechrecognizerPlugin.startSpeechRecognition(
        language: 'zh-CN',
      );
      _addLog('开始识别, sessionId=$sessionId');
    } catch (e) {
      _addLog('启动识别失败: $e');
      if (mounted) {
        setState(() {
          _statusText = '启动失败';
          _isListening = false;
        });
      }
    }
  }

  Future<void> _stopRecognition() async {
    try {
      await _speechrecognizerPlugin.stopSpeechRecognition();
      _addLog('已停止识别');
      if (mounted) {
        setState(() {
          _statusText = '已停止';
          _isListening = false;
        });
      }
    } catch (e) {
      _addLog('停止识别失败: $e');
    }
  }

  @override
  void dispose() {
    _speechrecognizerPlugin.removeListeners();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('语音识别插件示例'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Text('平台: $_platformVersion',
                  style: const TextStyle(fontSize: 14, color: Colors.grey)),
              const SizedBox(height: 12),

              // 权限按钮
              ElevatedButton.icon(
                onPressed: _requestPermission,
                icon: Icon(_permissionGranted ? Icons.check_circle : Icons.mic),
                label: Text(_permissionGranted ? '麦克风权限已授予' : '请求麦克风权限'),
                style: ElevatedButton.styleFrom(
                  backgroundColor:
                      _permissionGranted ? Colors.green : Colors.blue,
                  foregroundColor: Colors.white,
                ),
              ),
              const SizedBox(height: 16),

              // 状态
              Row(
                children: [
                  if (_isListening)
                    const SizedBox(
                      width: 16,
                      height: 16,
                      child: CircularProgressIndicator(strokeWidth: 2),
                    ),
                  if (_isListening) const SizedBox(width: 8),
                  Text('状态: $_statusText',
                      style: const TextStyle(fontSize: 16)),
                ],
              ),
              const SizedBox(height: 12),

              // 识别结果
              Container(
                padding: const EdgeInsets.all(16),
                decoration: BoxDecoration(
                  color: Colors.grey[100],
                  borderRadius: BorderRadius.circular(8),
                  border: Border.all(color: Colors.grey[300]!),
                ),
                constraints: const BoxConstraints(minHeight: 80),
                child: Text(
                  _recognizedText.isEmpty ? '识别结果将显示在此处...' : _recognizedText,
                  style: TextStyle(
                    fontSize: 18,
                    color:
                        _recognizedText.isEmpty ? Colors.grey : Colors.black87,
                  ),
                ),
              ),
              const SizedBox(height: 16),

              // 操作按钮
              Row(
                children: [
                  Expanded(
                    child: ElevatedButton.icon(
                      onPressed: _isListening ? null : _startRecognition,
                      icon: const Icon(Icons.mic),
                      label: const Text('开始识别'),
                      style: ElevatedButton.styleFrom(
                        backgroundColor: Colors.blue,
                        foregroundColor: Colors.white,
                        padding: const EdgeInsets.symmetric(vertical: 12),
                      ),
                    ),
                  ),
                  const SizedBox(width: 12),
                  Expanded(
                    child: ElevatedButton.icon(
                      onPressed: _isListening ? _stopRecognition : null,
                      icon: const Icon(Icons.stop),
                      label: const Text('停止识别'),
                      style: ElevatedButton.styleFrom(
                        backgroundColor: Colors.red,
                        foregroundColor: Colors.white,
                        padding: const EdgeInsets.symmetric(vertical: 12),
                      ),
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 16),

              // 日志区域
              const Text('日志:', style: TextStyle(fontWeight: FontWeight.bold)),
              const SizedBox(height: 4),
              Expanded(
                child: Container(
                  padding: const EdgeInsets.all(8),
                  decoration: BoxDecoration(
                    color: Colors.black87,
                    borderRadius: BorderRadius.circular(8),
                  ),
                  child: ListView.builder(
                    itemCount: _logs.length,
                    itemBuilder: (context, index) {
                      return Padding(
                        padding: const EdgeInsets.symmetric(vertical: 1),
                        child: Text(
                          _logs[index],
                          style: const TextStyle(
                            fontSize: 12,
                            color: Colors.greenAccent,
                            fontFamily: 'monospace',
                          ),
                        ),
                      );
                    },
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}