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lib/services/WebSocketService.dart

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+import 'dart:async';
+import 'dart:convert';
+import 'package:get/get.dart';
+import 'package:web_socket_channel/web_socket_channel.dart';
+import 'package:web_socket_channel/status.dart' as status;
+
+class WebSocketService extends GetxService {
+  //webscoket地址
+  static const String WS_URL = 'ws://192.168.1.129:8089/ws';
+  
+  WebSocketChannel? _channel;
+  final RxBool isConnected = false.obs;
+  final RxString connectionStatus = '未连接'.obs;
+  
+  // 当前选中的设备UUID
+  final RxString selectedDeviceUuid = ''.obs;
+  
+  Timer? _reconnectTimer;
+  int _reconnectAttempts = 0;
+  static const int MAX_RECONNECT_ATTEMPTS = 10;
+  
+  @override
+  void onClose() {
+    disconnect();
+    _reconnectTimer?.cancel();
+    super.onClose();
+  }
+  
+  Future<void> connect() async {
+    try {
+      _channel = WebSocketChannel.connect(Uri.parse(WS_URL));
+      isConnected.value = true;
+      connectionStatus.value = '已连接';
+      _reconnectAttempts = 0;
+      
+      _sendMessage({
+        'type': 'web_register',
+        'clientId': 'web_client_${DateTime.now().millisecondsSinceEpoch}',
+      });
+      
+      _channel!.stream.listen(
+        (message) {
+          _handleMessage(message);
+        },
+        onError: (error) {
+          print('WebSocket错误: $error');
+          connectionStatus.value = '错误: $error';
+          isConnected.value = false;
+          _scheduleReconnect();
+        },
+        onDone: () {
+          print('WebSocket连接断开');
+          connectionStatus.value = '已断开';
+          isConnected.value = false;
+          _scheduleReconnect();
+        },
+      );
+      
+    } catch (e) {
+      print('WebSocket连接失败: $e');
+      connectionStatus.value = '连接失败';
+      isConnected.value = false;
+      _scheduleReconnect();
+    }
+  }
+  
+  void _scheduleReconnect() {
+    if (_reconnectAttempts >= MAX_RECONNECT_ATTEMPTS) {
+      connectionStatus.value = '重连失败，请手动刷新';
+      return;
+    }
+    
+    _reconnectTimer?.cancel();
+    _reconnectTimer = Timer(Duration(seconds: 5), () {
+      _reconnectAttempts++;
+      connectionStatus.value = '重连中 (${_reconnectAttempts}/$MAX_RECONNECT_ATTEMPTS)...';
+      connect();
+    });
+  }
+  
+  void disconnect() {
+    _channel?.sink.close(status.goingAway);
+    _channel = null;
+    isConnected.value = false;
+    connectionStatus.value = '已断开';
+  }
+  
+  void _sendMessage(Map<String, dynamic> message) {
+    if (_channel != null && isConnected.value) {
+      _channel!.sink.add(jsonEncode(message));
+    } else {
+      print('WebSocket未连接，无法发送消息: $message');
+    }
+  }
+  
+  final List<Function(Map<String, dynamic>)> _messageHandlers = [];
+  
+  void registerMessageHandler(Function(Map<String, dynamic>) handler) {
+    _messageHandlers.add(handler);
+  }
+  
+  void _handleMessage(dynamic message) {
+    try {
+      final data = jsonDecode(message);
+      for (var handler in _messageHandlers) {
+        handler(data);
+      }
+    } catch (e) {
+      print('解析消息失败: $e');
+    }
+  }
+  
+  // ==================== 公开方法 ====================
+  
+  // 选择要控制的设备（建立连接）
+  void selectDevice(String uuid) {
+    selectedDeviceUuid.value = uuid;
+    _sendMessage({
+      'type': 'select_device',
+      'targetUuid': uuid,
+      'timestamp': DateTime.now().toIso8601String(),
+    });
+    print('选择设备: $uuid');
+  }
+  
+  // 开始扫描
+  void startScan() {
+    if (selectedDeviceUuid.value.isEmpty) {
+      print('请先选择设备');
+      return;
+    }
+    _sendMessage({
+      'type': 'scan',
+      'targetUuid': selectedDeviceUuid.value,
+      'timestamp': DateTime.now().toIso8601String(),
+    });
+    print('发送扫描命令');
+  }
+  
+  // 停止扫描
+  void stopScan() {
+    if (selectedDeviceUuid.value.isEmpty) {
+      print('请先选择设备');
+      return;
+    }
+    _sendMessage({
+      'type': 'stop_scan',
+      'targetUuid': selectedDeviceUuid.value,
+      'timestamp': DateTime.now().toIso8601String(),
+    });
+    print('发送停止扫描命令');
+  }
+  
+  // 连接蓝牙设备
+  void connectToDevice(String deviceId) {
+    if (selectedDeviceUuid.value.isEmpty) {
+      print('请先选择设备');
+      return;
+    }
+    _sendMessage({
+      'type': 'connect',
+      'targetUuid': selectedDeviceUuid.value,
+      'deviceId': deviceId,
+      'timestamp': DateTime.now().toIso8601String(),
+    });
+    print('连接蓝牙设备: $deviceId');
+  }
+  
+  // 断开蓝牙设备
+  void disconnectDevice() {
+    if (selectedDeviceUuid.value.isEmpty) {
+      print('请先选择设备');
+      return;
+    }
+    _sendMessage({
+      'type': 'disconnect',
+      'targetUuid': selectedDeviceUuid.value,
+      'timestamp': DateTime.now().toIso8601String(),
+    });
+    print('断开蓝牙设备');
+  }
+  
+  // 发送数据到设备
+  void sendDataToDevice(String data) {
+    if (selectedDeviceUuid.value.isEmpty) {
+      print('请先选择设备');
+      return;
+    }
+    _sendMessage({
+      'type': 'send_data',
+      'targetUuid': selectedDeviceUuid.value,
+      'data': data,
+      'timestamp': DateTime.now().toIso8601String(),
+    });
+    print('发送数据: $data');
+  }
+}