Thread: Connecting Android and PC for Speaking together in My own program

hello
I want to connect a PC and an Android for speaking together via wifi in a LAN. (For example I want to compose a game which plays between a PC and an android) I have used Server Socket in java and I can connect two PCs, but this Technic does not work between PC and android.
I think the InetAddress class does not work in android. I mean this class cannot find the Android device from a PC or inverse. (I check this class from another simple program and it didn't work!)
I should say that I have used the permissions below in my android project:

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>

Would you please be so kind, to tell me, how can I connect an android and a PC.
Sincerely yours

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The simple Server/Client java Code:

import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
 
public class TalkServer {
	private static Scanner ScreenInput;
	private static ServerSocket SServer;
	private static Scanner socketIN;
	public static void main(String[] args)
	{
		System.out.println("TalkServer Version 1.0");
		System.out.print("Type the port: ");
		ScreenInput = new Scanner(System.in);
		String sPort=ScreenInput.nextLine();
		int iPort=Integer.parseInt(sPort);
		System.out.println("Port Nomber is:"+iPort);
		System.out.println("Wait for a client...");
 
		try
		{
			SServer = new ServerSocket(iPort);
			Socket SClient;
			SClient=SServer.accept();
			String client;
			client = SClient.getInetAddress().toString();
			System.out.println("Connected to " + client);
			socketIN = new Scanner(SClient.getInputStream());
			PrintWriter SocketOut;
			SocketOut=new PrintWriter(SClient.getOutputStream(),true);
			while (true)
			{
				System.out.print("Listening for Client:");
				String sInput=socketIN.nextLine();
				System.out.println(sInput);
				SocketOut.println("Server:"+sInput);
				if (sInput.equalsIgnoreCase("bye"))
					break;
			}
			SClient.close();
			SServer.close();
			System.out.println("Server closed");
		}
		catch(Exception e)
		{
			e.printStackTrace();
			System.out.println("Error in connection");
		}
	}
}
 
 
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import java.io.IOException;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
 
public class TalkClient {
	private static Scanner keyBoard;
	private static Scanner socketIN;
 
	public static void main(String[] args)
	{
		System.out.println("TalkClient Version 1.0");
		System.out.print("Type the port:");
		keyBoard = new Scanner(System.in);
		String sPort=keyBoard.nextLine();
		int iPort=Integer.parseInt(sPort);
		System.out.println("Port Nomber is "+iPort);
		System.out.print("Type the Host:");
		String sHost=keyBoard.nextLine();
		Socket s;
		InetAddress ip;
		try
		{
			ip=InetAddress.getByName(sHost);
			System.out.println("This Host has The IPs below:");
			InetAddress[] address=InetAddress.getAllByName(sHost);
			for (InetAddress iIP: address)
				System.out.println(iIP.toString());
			System.out.println("Now Connecting to the Server...");
			s=new Socket(ip,iPort);
			System.out.println("Connected to "+iPort);
			socketIN = new Scanner(s.getInputStream());
			PrintWriter SocketOut;
			SocketOut=new PrintWriter(s.getOutputStream(),true);
			while(true)
			{
				System.out.print("Say something:");
				String sSay=keyBoard.nextLine();
				SocketOut.println(sSay);
				String sListen=socketIN.nextLine();
				System.out.println("check back:"+sListen);
				if (sSay.equalsIgnoreCase("bye")) break;
			}
		}
		catch (UnknownHostException e)
		{
			System.out.println("the hos t is unknown");
		}
		catch (IOException e)
		{
			System.out.println("Netwerk Error");
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
}

A simple java Inetaddress Code:
In PC this code work very well. It find not only the IP addresses of the stations in Local Lan but also the IP addresses of Sites in Internet.

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Scanner;
 
public class HostName {
	private static Scanner ScreenInput;
 
	public static void main(String[] args)
	{
		System.out.println("IP checker");
		ScreenInput = new Scanner(System.in);
		while (true)
		{
			System.out.print("Type the host name: ");
			String sIP=ScreenInput.nextLine();
			if (sIP.equals("")) break;
			try
			{
				InetAddress[] address=InetAddress.getAllByName(sIP);
				for (InetAddress iIP: address)
					System.out.println(iIP.toString());
			}
			catch(UnknownHostException e)
			{
				System.out.println("Unknown host");
			}
			catch(Exception e)
			{
				System.out.println("Other Errrors");
			}
			System.out.println("**********");
		}
 
	}
}

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