如何解决用Ffltter编写Android应用程序和用Python编写的服务器之间的UDP通信问题

我面临着在用DART编写的Android应用程序和Python服务器之间建立连接的挑战.这款安卓应用程序运行在安卓模拟器上.

我成功地使用WebSocket建立了连接，但在使用UDP时遇到了困难.令人惊讶的是，没有错误消息.

下面是应用程序的部分Dart代码:

    final serverAddress = InternetAddress('10.0.2.15');
    const port = 50001;
    _clientSocket = await RawDatagramSocket.bind(InternetAddress.anyIPv4, port);
    _clientSocket.send('Hello from Flutter'.codeUnits, serverAddress, port);

    _clientSocket.listen((RawSocketEvent event) {
      if (event == RawSocketEvent.read) {
        Datagram dg = _clientSocket.receive()!;
        String message = String.fromCharCodes(dg.data);
        print('Received message: $message');
      }
    });

以下是服务器代码:

import socket

localIP = "127.0.0.1"
print(localIP)

localPort = 50001
bufferSize = 1024

UDPServerSocket = socket.socket(family=socket.AF_INET, type=socket.SOCK_DGRAM)
UDPServerSocket.bind((localIP, localPort))
print("UDP server up and listening")

while True:
    bytesAddressPair = UDPServerSocket.recvfrom(bufferSize)
    message = bytesAddressPair[0]
    address = bytesAddressPair[1]

    clientMsg = "Message from Client:{}".format(message)
    clientIP = "Client IP Address:{}".format(address)

    print(f"{clientMsg}\n{clientIP}\n-----------------\n")

    # Sending a reply to the client
    replyMsg = f"Hello test agent, thanks for messaging!\n-----------------\n"
    UDPServerSocket.sendto(str.encode(replyMsg), address)