VitalApp/lib/pages/admin/usb_state.dart

import 'package:flutter/services.dart';

class UsbState {
  final EventChannel _eventChannel =
      EventChannel('com.vinno.vitalapp/usb_events');

  void startListening() {
    _eventChannel.receiveBroadcastStream().listen(
      (dynamic event) {
        // 这里我们期望event是一个Map，包含USB设备的信息
        Map<dynamic, dynamic> usbEvent = event as Map<dynamic, dynamic>;
        print('USB Event: $usbEvent');

        String action = usbEvent['action'] ?? 'unknown';
        String name = usbEvent['name'] ?? 'unknown';
        String type = usbEvent['type'] ?? 'unknown';

        if (action == 'attached') {
          print('USB device attached: Name - $name, Type - $type');
          // USB设备已连接，可以根据需要处理
        } else if (action == 'detached') {
          print('USB device detached: Name - $name, Type - $type');
          // USB设备已断开，可以根据需要处理
        }
      },
      onError: (dynamic error) {
        print('USB Event Error: $error');
      },
    );
  }
}