为什么不接受消息？

Question

在 WinForms 下工作，所以没有。

将来，我想以某种方式连续显示所有帖子。但是直到这个阶段还没有到，因为现在连一条消息都不被接受。

public class MainActivity : Activity
{
    public string mess;

    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);
        StartListening ();

        Button bt = FindViewById<Button>(Resource.Id.button1);
        bt.Click += delegate { start();};
        // Get our button from the layout resource, and attach an event to it
    }

    public void start()
    {
        TextView text = FindViewById<TextView> (Resource.Id.textView1);

        StartListening();
        text.Text = mess;
    }

    private readonly UdpClient udp = new UdpClient(45000);

    public void StartListening()
    {
        this.udp.BeginReceive(Receive, new object());
    }

    public void Receive(IAsyncResult ar)
    {
        IPEndPoint ip = new IPEndPoint(IPAddress.Any, 45000);
        byte[] bytes = udp.EndReceive(ar, ref ip);

        mess = Encoding.ASCII.GetString(bytes);
        StartListening();
    }
}

Answer 1

如果你调试你的代码，你就会看到什么时候会发生什么！所以试试这个，我相信您会惊讶于解决您的问题是多么容易。

总之，您设置消息定时的方式不正确。请尝试使用此代码。它删除消息状态（函数式编程）并在收到消息后设置消息。

public class MainActivity : Activity
{
    private readonly UdpClient udp = new UdpClient(45000);

    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.Main);
        StartListening();
        Button bt = FindViewById<Button>(Resource.Id.button1);
        bt.Click += delegate { StartListening(); };
    }

    public void StartListening()
    {
        this.udp.BeginReceive(Receive, new object());
    }

    public void Receive(IAsyncResult ar)
    {
        IPEndPoint ip = new IPEndPoint(IPAddress.Any, 45000);
        byte[] bytes = udp.EndReceive(ar, ref ip);
        DisplayMessage(Encoding.ASCII.GetString(bytes));
        StartListening();
    }

    public void DisplayMessage(string message)
    {
        FindViewById<TextView>(Resource.Id.textView1).Text = message;
    }
}

为什么不接受消息？

Why does not accept messages?

c#

android

c#-4.0

xamarin