Question

我在Android应用和C＃Windows窗体应用之间使用蓝牙通信。 Android应用程序用作客户端，C＃应用程序用作服务器。我只能处理服务器（笔记本电脑）上的连接，当我断开连接并再次尝试连接时似乎没有发生任何事情。我认为客户端工作正常，因为我已经用另一个移动设备测试了它，而且这个错误在服务器代码中。

这是服务器代码：

public partial class Form1 : Form
{
    Thread connectserver;
    Stream mstream;
    BluetoothClient client;
    BluetoothListener bluelisten;
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        if (serverstart)
        {
            updateui("server already started");
        }
        connectasserver();
    }

    private void connectasserver()
    {
         connectserver=new Thread(new ThreadStart (serverconnectedthread));
        connectserver.Start();

    }
    Guid muuid = new Guid("00001101-0000-1000-8000-00805F9B34FB");
    bool serverstart = false;
    public void serverconnectedthread()
    {
        serverstart = true;
        updateui("waiting for connections of clients\n");
         bluelisten = new BluetoothListener(muuid);
        bluelisten.Start();
        client = new BluetoothClient();
         client = bluelisten.AcceptBluetoothClient();
        updateui("client has connected\n");
        mstream=client.GetStream();

        while(true)
        {
            try
            {
                byte[] recieved = new byte[1024];
                mstream.Read(recieved, 0, recieved.Length);

                updateui("recieved: " + Encoding.ASCII.GetString(recieved));
                byte[] sent = Encoding.ASCII.GetBytes(" hello world\n");
                mstream.Write(sent, 0, sent.Length);
            }
            catch(IOException except)
            {

                updateui("client has been disconnected\n");
                connectserver.Abort();
                client.Close();
                mstream.Flush();
                break;
            }
       }

    }

    private void updateui(string mess)
    {
        Func<int> del = delegate()
        {
            textbox3.AppendText(mess + System.Environment.NewLine);
            return 0;
        };
        Invoke(del);

    }

    private void label1_Click(object sender, EventArgs e)
    {

    }

    private void textBox3_TextChanged()
    {

    }
}

Answer 1

catch（IOException除外） {

            updateui("client has been disconnected\n");
            connectserver.Abort();
             severstart = false;      // add this line to the catch block.
            client.Close();
            mstream.Flush();
            break;
        }

将severstart设置为false，以便它不会假设它已经启动了服务器。

Android应用程序和c＃windows窗体应用程序之间的蓝牙通信

1 个答案: