Sockets - Communication between C# and JAVA Android

Question

I have a JAVA application that is reading a message:

public void onClick(View view)
{
    new Thread((new ClientThread())).start();
    //Intent i = new Intent(MainActivity.this,Main2Activity.class);
   // startActivity(i);
}

//Thread que inicia o socket
class ClientThread implements Runnable
{
    @Override
    public void run() {
        try
        {
            InetAddress serveradress = InetAddress.getByName(server_IP);
            Log.e("TCP","A conetar...");
            socket = new Socket(serveradress,PORT);

            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            while((mensagem = in.readLine()) != null)
            {
                mensagem_final += mensagem;
            }
            txt.setText(mensagem_final);

            if(in.readLine() == null)
            {
                Log.e("TCP","Nao tem mensagens");
            }
            Log.e("MSG",mensagem);

            socket.close();
        }
        catch (UnknownHostException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        }

    }
}

Now I'm trying to create a server in C# and all extra code is freezing when I run the server. And I still cant get the message from C# server.

            Servidor servidor = new Servidor();
            servidor.server();



 class Servidor
{
    public void server()
    {

            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            TcpListener tcplistener = new TcpListener(IPAddress.Any, 6000);
            tcplistener.Start();


            TcpClient tcpclient = tcplistener.AcceptTcpClient();

            byte[] data = new byte[1024];
            NetworkStream ns = tcpclient.GetStream();

            string welcome = "Ola";
            data = Encoding.ASCII.GetBytes(welcome);
            ns.Write(data, 0, data.Length);



    }
}

Any help? I use Servidor servidor = new Servidor(); servidor.server(); in another windowsform. This window forms load another windowsforms and should also load the server. But everything on the windowsforms just freezes. Maybe I need threads?

Answer 1

AcceptTcpClient is a blocking call, and it really needs to be handled by something that spawns a new thread each time it succeeds, but for a single instance just try wrapping in a new thread eg

Task.Factory.StartNew(() =>
{
    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    TcpListener tcplistener = new TcpListener(IPAddress.Any, 6000);
    tcplistener.Start();


    TcpClient tcpclient = tcplistener.AcceptTcpClient();

    byte[] data = new byte[1024];
    NetworkStream ns = tcpclient.GetStream();

    string welcome = "Ola";
    data = Encoding.ASCII.GetBytes(welcome);
    ns.Write(data, 0, data.Length);



});