Android与C#服务器的TCP通信->；插座，关上

我有一个Android客户端和一个C#服务器。它们通过套接字进行通信，C#服务器处理异步接收

通信本身没有问题。我可以在服务器上验证客户端，并相互发送消息。但是如果我试图通过关闭客户端上的套接字

socket.close();

服务器收到“垃圾邮件”和空数据包。一旦OutputStream关闭，就会发生这种情况

这是我的Android客户端代码：

public void run()
{ 
    try
    {                   
        InetAddress serverAddr = InetAddress.getByName(pServerIp);            
        Socket socket = new Socket(serverAddr, pServerPort);
        try 
        {
            OutputStream socketoutstr = socket.getOutputStream(); 
            OutputStreamWriter osr = new OutputStreamWriter( socketoutstr ); 
            bw = new BufferedWriter( osr ); 

            InputStream socketinstr = socket.getInputStream(); 
            InputStreamReader isr = new InputStreamReader( socketinstr ); 
            br = new BufferedReader( isr );                      

            User tmp = Login("SESAM", "PASSWORD");
            if(tmp != null)
            {
                Log.e("TCP", "Login succeeded!");
                user = tmp;
            }
            else
            {
                Log.e("TCP", "Login failed!");
                socket.close();
            }
        } 
        catch(Exception e) 
        {
            Log.e("TCP", "S: Error", e);
            socket.close();
        } 
        finally 
        {
        }
    } 
}

这是我的服务器代码中处理传入数据的部分：

private void WaitForData()
{
    try
    {
        WorkerCallback = new AsyncCallback(OnDataReceived);

        UndefinedPacket packet = new UndefinedPacket();
        socket.BeginReceive(packet.DataBuffer, 0, packet.DataBuffer.Length, SocketFlags.None, WorkerCallback, packet);
    }
    catch (SocketException se)
    {
        Console.WriteLine(se.Message);
    }
}

private void OnDataReceived(IAsyncResult asyn)
{
    UndefinedPacket socketData = (UndefinedPacket)asyn.AsyncState;
    try
    {
        int CharCount = socket.EndReceive(asyn);
        char[] chars = new char[CharCount];

        System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
        String text = System.Text.Encoding.UTF8.GetString(socketData.DataBuffer);
        int charLen = d.GetChars(socketData.DataBuffer, 0, CharCount, chars, 0);

        String data = new String(chars);
        if (data.Length > 0)
        {
            IClientPacket packet = PacketFactory.GetInstance(data);
            server.PacketManager.AddIncomingPacket(packet, this);
        }
        Console.WriteLine("Received Data!");
        WaitForData();
    }
    catch (ObjectDisposedException)
    {
        Console.WriteLine("OnDataReceived: Socket has been closed");
        server.RemoveWorkerSocket(this);
    }
    catch (SocketException se)
    {
        if (se.ErrorCode == 10054) // Connection reset by peer
        {
            string msg = "Client Disconnected";
            Console.WriteLine(msg);
            server.RemoveWorkerSocket(this);
        }
        else
        {
            Console.WriteLine(se.Message);
            server.RemoveWorkerSocket(this);
        }
    }
    catch (Exception e)
    {
        Console.WriteLine(e.Message);
        server.RemoveWorkerSocket(this);
    }            
}

当我简单地关闭Android emulator时，我得到了正确的服务器消息：“Client Disconnected”

但当我关闭Outputstream或客户端上的整个套接字时，OnDataReceived（）会以data.length为“0”的速度重复调用

谢谢你的帮助

它不是空的“数据包”（请注意，TCP是一个流）——从TCP套接字读取零字节意味着另一端关闭了连接，因此您也应该关闭自己的一端

---

“客户端已断开连接”这可能是仿真器出现故障并切断所有连接时的结果。

您是否可以尝试使用真实设备，以便从可能的原因列表中排除仿真器？也可以尝试在关闭套接字之前关闭输入和输出流。好的，但是如果没有，为什么会调用“OnDataReceived”发送数据？正是为了告诉您必须关闭连接。