Flutter如何检查我的设备是否已连接到另一台蓝牙设备

dependencies:
  flutter_blue: ^0.7.3

import 'package:flutter_blue/flutter_blue.dart';

FlutterBlue flutterBlue = FlutterBlue.instance;

flutterBlue.startScan(timeout: Duration(seconds: 4));

flutterBlue.scanResults.listen((List<ScanResult> results) {
  for (ScanResult result in results) {
    // 在这里处理扫描到的设备信息
    print('Device name: ${result.device.name}, RSSI: ${result.rssi}');
  }
});

flutterBlue.stopScan();

BluetoothDevice device; // 获取到特定设备的BluetoothDevice实例
device.connect();

device.state.listen((BluetoothDeviceState state) {
  if (state == BluetoothDeviceState.connected) {
    // 设备已连接到蓝牙设备
    print('Device is connected to Bluetooth device.');
  }
});