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Nom Rana <[email protected]>
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package com.example.myapplication4;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;

public class MainActivity extends AppCompatActivity
{
DatagramSocket socket;

TextView t;
EditText e;
Button b;

class SocketListener implements Runnable
{
String str;

public void run()
{
DatagramPacket packet;
byte[] buf = new byte[256];

try
{
while (true)
{
packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
String s = new String(packet.getData());

CharSequence cs = t.getText();
str = cs + "J> " + s + "n";

t.post(new Runnable()
{
public void run()
{
t.setText(str);
}
}
);
}
}
catch (IOException e)
{
Log.e(getClass().getName(), e.getMessage());
}
}
}

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

try
{
socket = new DatagramSocket();
}
catch (SocketException e1) {}

e = (EditText) findViewById(R.id.editText);

t = (TextView) findViewById(R.id.textView);
t.setMovementMethod(new ScrollingMovementMethod());

Button b = (Button) findViewById(R.id.button);
b.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
String s = e.getText().toString();
t.setText(t.getText() + "A> " + s + "rn");

try {
byte[] buf = new byte[256];
buf = s.getBytes();

InetAddress address = InetAddress.getByName("192.168.0.106"); // Change this to the IP address of your computer OR “10.0.2.2”(Gateway to 127.0.0.1 of host)
final DatagramPacket packet = new DatagramPacket(buf, buf.length, address, 2222);

new Thread() {
public void run() {
try {
socket.send(packet);
} catch (IOException e1) {
e1.printStackTrace();
}
}
}.start();
} catch (UnknownHostException e2) {

}
}
});

Thread t = new Thread (new SocketListener ());
t.start();
}
}
new 3.txt
Displaying new 3.txt.