s

lib/scenes/SoundRecordScene.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:path_provider/path_provider.dart';
 import 'package:flutter_sound/flutter_sound.dart';
 import 'package:audioplayers/audioplayers.dart';
 import 'package:permission_handler/permission_handler.dart';
@@ -11,65 +12,168 @@ class SoundRecordScene extends StatefulWidget {
 class _SoundRecordSceneState extends State<SoundRecordScene> {
   FlutterSoundRecorder? _soundRecorder;
   AudioPlayer? _audioPlayer;
+  bool _isRecorderReady = false;
+  bool _isRecording = false;
+  bool _isSpeaking = false; // 是否正在说话
   String? _audioFilePath;
+  double _volumeLevel = 0.0; // 当前音量值
+  DateTime? _lastBelowThresholdTime; // 上次音量低于阈值的时间
   ScrollController _scrollController = ScrollController();
   List<String> _logs = [];
 
+  // 音量阈值
+  final double _speakingThreshold = -30.0; // 开始说话的阈值
+  final double _silenceThreshold = -40.0; // 结束说话的阈值
+  final Duration _silenceDuration = Duration(seconds: 1); // 持续低于阈值的时间
+
+  // 采样率和声道数
+  final int _sampleRate = 16000; // 16kHz 采样率
+  final int _numChannels = 1; // 单声道
+
   @override
   void initState() {
     super.initState();
     _soundRecorder = FlutterSoundRecorder();
+    // 监听音量变化
+    _soundRecorder?.onProgress?.listen((event) {
+      _log('onProgress 回调触发, 分贝: ${event.decibels}');
+      if (event.decibels != null) {
+        setState(() {
+          _volumeLevel = event.decibels!; // 更新音量值
+        });
+        _checkSpeakingStatus(); // 检查说话状态
+      }
+    });
     _audioPlayer = AudioPlayer();
     _requestPermissions();
+    _initRecorder();
+  }
+
+  // 初始化录音器
+  void _initRecorder() async {
+    try {
+      await _soundRecorder?.openRecorder();
+      setState(() {
+        _isRecorderReady = true;
+      });
+      _log('录音器初始化成功');
+    } catch (e) {
+      _log('初始化录音器失败: $e');
+      setState(() {
+        _isRecorderReady = false;
+      });
+    }
   }
 
   // 请求麦克风权限
   void _requestPermissions() async {
     try {
-      await Permission.microphone.request();
+      if (await Permission.microphone.request().isGranted) {
+        _log('麦克风权限已授予');
+      } else {
+        _log('麦克风权限被拒绝');
+        setState(() {
+          _isRecorderReady = false;
+        });
+      }
     } catch (e) {
-      _log('播放录音失败: $e');
+      _log('请求麦克风权限失败: $e');
+      setState(() {
+        _isRecorderReady = false;
+      });
     }
   }
 
   // 开始录音
   void _startRecording() async {
     try {
-      _log('录音开始');
-      final tempPath =
-          '/data/user/0/com.example.flutter_app/cache/recorded_audio.aac'; // 可根据需要调整路径
+      if (!_isRecorderReady) {
+        _log('录音器未准备好');
+        return;
+      }
+
+      if (_isRecording) return; // 防止重复调用
+
+      final directory = await getTemporaryDirectory();
+      final tempPath = '${directory.path}/recorded_audio.aac';
+      _log('录音文件路径: $tempPath');
+
       await _soundRecorder?.startRecorder(
         toFile: tempPath,
         codec: Codec.aacADTS,
+        sampleRate: _sampleRate, // 设置采样率
+        numChannels: _numChannels, // 设置声道数
+        enableVoiceProcessing: false, // 启用音量监听
       );
       setState(() {
         _audioFilePath = tempPath;
+        _isRecording = true;
       });
+      _log('录音开始');
     } catch (e) {
-      _log('播放录音失败: $e');
+      _log('录音开始 异常: $e');
     }
   }
 
   // 停止录音
   void _stopRecording() async {
     try {
+      if (!_isRecording) return; // 防止重复调用
       await _soundRecorder?.stopRecorder();
+      setState(() {
+        _isRecording = false;
+        _volumeLevel = 0.0; //重置音量值
+      });
       _log('录音停止');
     } catch (e) {
-      _log('播放录音失败: $e');
+      _log('录音停止 异常: $e');
     }
   }
 
   // 播放录音
   void _playRecording() async {
-    if (_audioFilePath != null) {
-      await _audioPlayer?.play(DeviceFileSource(_audioFilePath!));
-      _log('播放录音');
+    try {
+      if (_audioFilePath != null) {
+        await _audioPlayer?.play(DeviceFileSource(_audioFilePath!));
+        _log('播放录音');
+      }
+    } catch (e) {
+      _log('播放录音 异常: $e');
+    }
+  }
+
+  // 检查说话状态
+  void _checkSpeakingStatus() {
+    if (_volumeLevel > _speakingThreshold && !_isSpeaking) {
+      // 音量高于阈值，表示开始说话
+      setState(() {
+        _isSpeaking = true;
+      });
+      _log('开始说话');
+    } else if (_volumeLevel < _silenceThreshold) {
+      // 音量低于阈值
+      if (_lastBelowThresholdTime == null) {
+        // 记录第一次低于阈值的时间
+        _lastBelowThresholdTime = DateTime.now();
+      } else if (DateTime.now().difference(_lastBelowThresholdTime!) >
+          _silenceDuration) {
+        // 持续低于阈值超过指定时间，表示结束说话
+        if (_isSpeaking) {
+          setState(() {
+            _isSpeaking = false;
+          });
+          _log('结束说话');
+        }
+      }
+    } else {
+      // 音量恢复到阈值以上，重置计时器
+      _lastBelowThresholdTime = null;
     }
   }
 
   // 添加日志信息并自动滚动
   void _log(String message) {
+    print("输出日志:${message}");
     setState(() {
       _logs.add(message); // 从顶部插入新日志
     });
@@ -128,31 +232,64 @@ class _SoundRecordSceneState extends State<SoundRecordScene> {
               ),
             ),
           ),
-          // 按钮区域
-          GestureDetector(
-            onTapDown: (details) {
-              _startRecording(); // 按下时开始录音
-            },
-            onTapUp: (details) {
-              _stopRecording(); // 抬起时停止录音并播放
-              _playRecording(); // 播放录音
-            },
-            child: Container(
-              margin: EdgeInsets.all(20),
-              padding: EdgeInsets.all(20),
-              decoration: BoxDecoration(
-                color: Colors.blue,
-                shape: BoxShape.circle,
-              ),
-              child: Icon(
-                Icons.mic,
-                color: Colors.white,
-                size: 50,
-              ),
-            ),
-          ),
+
+          // 底部按钮区域
+          Padding(
+              padding: const EdgeInsets.all(20.0),
+              child:
+                  Row(mainAxisAlignment: MainAxisAlignment.center, children: [
+                // 音量图标和音量值
+                Row(
+                  children: [
+                    Icon(
+                      Icons.volume_up,
+                      size: 30,
+                    ),
+                    SizedBox(width: 10), // 间距
+                    Text(
+                      '${_volumeLevel.toStringAsFixed(2)} dB', //显示音量值，保留两位小数
+                      style: TextStyle(fontSize: 16),
+                    ),
+                  ],
+                ),
+                SizedBox(width: 20), // 间距
+                // 按钮区域
+                GestureDetector(
+                  onTapDown: (details) {
+                    _startRecording(); // 按下时开始录音
+                  },
+                  onTapUp: (details) {
+                    _stopRecording(); // 抬起时停止录音并播放
+                    _playRecording(); // 播放录音
+                  },
+                  child: Container(
+                    margin: EdgeInsets.all(20),
+                    padding: EdgeInsets.all(20),
+                    decoration: BoxDecoration(
+                      color: Colors.blue,
+                      shape: BoxShape.circle,
+                    ),
+                    child: Icon(
+                      Icons.mic,
+                      color: Colors.white,
+                      size: 50,
+                    ),
+                  ),
+                ),
+              ]))
         ],
       ),
     );
   }
+
+  // 根据音量值动态调整图标颜色
+  Color _getVolumeColor() {
+    if (_volumeLevel < -40) {
+      return Colors.green; // 低音量
+    } else if (_volumeLevel < -20) {
+      return Colors.yellow; // 中音量
+    } else {
+      return Colors.red; // 高音量
+    }
+  }
 }