Create server TCP in Winodws Univeral App (Javascript) and client Android

To create a TCP server in a Windows Universal App using JavaScript and a TCP client in Android, you can use the following steps:

1. Create TCP Server (Windows Universal App - JavaScript):
   • In your Windows Universal App, you can use the Windows.Networking.Sockets namespace to create a TCP server. This namespace allows you to create socket objects for communication.
   • First, make sure you have the necessary capabilities in your app manifest to enable network communication. Add the "Internet (Client & Server)" capability to allow the app to act as a server.
   • Then, use the following JavaScript code to create a TCP server:

javascriptCopy code
// Import Windows.Networking.Sockets namespace

var sockets = Windows.Networking.Sockets;



// Create a socket listener

var serverListener = new sockets.StreamSocketListener();



// Bind the listener to a specific port

serverListener.bindServiceNameAsync("12345").done(

    function () {

        // Listen for connections

        serverListener.addEventListener("connectionreceived", function (args) {

            // Handle the connection

            var inputStream = args.socket.inputStream;

            var dataReader = new Windows.Storage.Streams.DataReader(inputStream);

            

            // Read incoming data from the client

            dataReader.loadAsync(1024).done(function (count) {

                var receivedData = dataReader.readString(count);

                // Process the received data here



                // Send a response back to the client (optional)

                var outputStream = args.socket.outputStream;

                var dataWriter = new Windows.Storage.Streams.DataWriter(outputStream);

                dataWriter.writeString("Server received your data.");

                dataWriter.storeAsync().done(function () {

                    dataWriter.close();

                });

            });

        });

    },

    function (error) {

        console.error("Error binding the socket: " + error.message);

    }

);

1. Create TCP Client (Android):
   • In your Android app, you can use the java.net.Socket class to create a TCP client and connect to the TCP server running on the Windows Universal App.
   • Use the following Java code to create a TCP client:

javaCopy code
import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;



public class TcpClient {

    public static void main(String[] args) {

        try {

            String serverIpAddress = "192.168.1.100"; // Replace with the IP address of your Windows Universal App

            int serverPort = 12345; // Replace with the port number used by the TCP server



            // Create a new socket and connect to the server

            Socket socket = new Socket(serverIpAddress, serverPort);



            // Create reader and writer for socket communication

            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);



            // Send data to the server

            out.println("Hello, server!");



            // Read response from the server

            String response = in.readLine();

            System.out.println("Server response: " + response);



            // Close the socket when done

            socket.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

Note: Replace "192.168.1.100" with the IP address of your Windows Universal App server and "12345" with the port number you used for the server.

With these code snippets, you can create a TCP server in your Windows Universal App and a TCP client in your Android app, allowing them to communicate over the network.