这对我很有效

//Get bluetooth results
Future<List<ScanResult>> bluetoothScan()async{
  List<ScanResult> bluetoothDevices = [];
  FlutterBlue flutterBlue = FlutterBlue.instance;
  //Stop scan before restarting scan too prevent errors when trying to scan
  await flutterBlue.stopScan();
  print("Start scan");
  // Start scanning
  List<dynamic> foundDevices = await flutterBlue.startScan(
    timeout: const Duration(
      seconds: 10,
    ),
  ).asStream().toList();
  await flutterBlue.stopScan();
  print("Scan end");
  for(dynamic devices in foundDevices){
    for(ScanResult device in devices){
      bluetoothDevices.add(device);
    }
  }
  return bluetoothDevices;
}

但是，由于某种原因，设备名称为空