0812

lib/utils/tts_engine_manager.dart

@@ -0,0 +1,56 @@
+import 'package:flutter_tts/flutter_tts.dart';
+
+typedef TtsCompletionCallback = void Function();
+typedef TtsErrorCallback = void Function(String error);
+
+class TtsEngineManager {
+  static final TtsEngineManager _instance = TtsEngineManager._internal();
+  factory TtsEngineManager() => _instance;
+  TtsEngineManager._internal();
+
+  final FlutterTts _flutterTts = FlutterTts();
+
+  TtsCompletionCallback? onComplete;
+  TtsErrorCallback? onError;
+
+  bool _isInitialized = false;
+
+  Future<void> init({String language = 'zh-CN', double speechRate = 0.5}) async {
+    if (_isInitialized) return;
+    await _flutterTts.setLanguage(language);
+    await _flutterTts.setSpeechRate(speechRate);
+    _flutterTts.setCompletionHandler(() {
+      if (onComplete != null) onComplete!();
+    });
+    _flutterTts.setErrorHandler((msg) {
+      if (onError != null) onError!(msg);
+    });
+    _isInitialized = true;
+  }
+
+  Future<void> speak(String text, {String? language, double? speechRate}) async {
+    if (!_isInitialized) {
+      await init(language: language ?? 'zh-CN', speechRate: speechRate ?? 0.5);
+    }
+    if (language != null) await _flutterTts.setLanguage(language);
+    if (speechRate != null) await _flutterTts.setSpeechRate(speechRate);
+    await _flutterTts.speak(text);
+  }
+
+  Future<void> stop() async {
+    await _flutterTts.stop();
+  }
+
+  Future<void> setLanguage(String language) async {
+    await _flutterTts.setLanguage(language);
+  }
+
+  Future<void> setSpeechRate(double rate) async {
+    await _flutterTts.setSpeechRate(rate);
+  }
+
+  void dispose() {
+    _flutterTts.stop();
+    _isInitialized = false;
+  }
+}