MainActivity

package com.example.testinger;

import java.net.DatagramSocket;
import java.net.SocketException;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
     byte[] buf = new byte[50];
     Integer msgCount=0;
     ReceiveThread recv;
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Button b = (Button) findViewById(R.id.button1);
        b.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {


                DatagramSocket sendSocket=null;
                try {
                    sendSocket = new  DatagramSocket(57111);
                    sendSocket.setSoTimeout(5000);
                } catch (SocketException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                try {
                    recv = new ReceiveThread(msgCount, sendSocket);
                    recv.startReceiving();


                } catch (SocketException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

        });


        Button b2 = (Button) findViewById(R.id.button2);
        b2.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                recv.stopReceiving();
                TextView t = (TextView) findViewById(R.id.textView1);
                //received = true;
                t.setText(String.valueOf(msgCount));
            }});

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        //subject
        return true;
    }

}