Flutter - 将类型从一个包转换到另一个包

Question

我正在开发一个应用程序，我需要在其中显示蓝牙（经典和BLE）设备，并且我能够发现使用（flutter_bluetooth_serial）包并在ListView中显示。我还可以连接经典设备，但无法连接 BLE 设备。据我了解，我发现使用 (flutter_bluetooth_serial) 的设备，当我尝试连接 BLE 设备时，由于类型问题而失败。所以我所做的是，尝试将 BluetoothDevice 转换为包（flutter_blue_plus.dart），但它抛出以下错误。我想连接到经典设备和 BLE 设备。有人可以给我一些灯吗？

import 'package:flutter_bluetooth_serial/flutter_bluetooth_serial.dart';
import 'package:flutter_blue_plus/flutter_blue_plus.dart' as bluetoothLEManager;

   connectToExternalDevice(BluetoothDevice connectingDevice) async {
      if (connectingDevice.type == BluetoothDeviceType.le) {
      final bbleDevice = connectingDevice as bluetoothLEManager.BluetoothDevice; // here is where I'm getting the below exception
      print(bbleDevice);
  }
  try { // This part works if the connecting device is classic
    classicDevice = connectingDevice;
    await BluetoothConnection.toAddress(classicDevice.address).then((result) {
    isBluetoothConnected = true;
    connection = result;
    notifyListeners();
    connection?.input?.listen(onDataReceived).onDone(() {
    print("On done");
  });
  });
  } catch (exception) {
    print("exception");    
  }
}


Exception has occurred.
    •   
_TypeError (type 'BluetoothDevice' is not a subtype of type 'BluetoothDevice' in type cast where
  BluetoothDevice is from package:flutter_bluetooth_serial/flutter_bluetooth_serial.dart
  BluetoothDevice is from package:flutter_blue_plus/flutter_blue_plus.dart

Answer 1

这两个

BluetoothDevice

是完全不同的类型，只是名称相同而已。如果您确实愿意，可以使用第二个包中

BluetoothDevice

的构造函数，并用从第一个包中

BluetoothDevice

获取的信息填充它。例如：

final bbleDevice = bluetoothLEManager.BluetoothDevice.fromId(connectingDevice.address);

请注意，不能保证这在任何情况下都有效，因为不同的类型可能有不同的实现，并且缺乏其他类型上存在的属性。