Android and Count Down (CountDownTimer)

package com.myapp;

import java.util.Timer;
import java.util.TimerTask;

import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;

public class MainActivity extends Activity {

	Handler handler = new Handler();
	Timer timer = new Timer();	
	TimerTask timetask;
	
	private final long startTime = 10000;  // 1000 = 1 second
	private final long interval = 1000;
	
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);	

		final MyCountDown countdown = new MyCountDown(startTime,interval);
		
		// btnStart
		final Button btnStart = (Button) findViewById(R.id.btnStart);
		// Perform action on click
		btnStart.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				// TODO Auto-generated method stub
				countdown.start();
			}
		});
		
		// btnStop
		final Button btnStop = (Button) findViewById(R.id.btnStop);
		// Perform action on click
		btnStop.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				// TODO Auto-generated method stub
				countdown.cancel();
			}
		});

	}
	
	public class MyCountDown extends CountDownTimer {
		public MyCountDown(long millisInFuture, long countDownInterval) {
			super(millisInFuture, countDownInterval);
			// TODO Auto-generated constructor stub
		}

		@Override
		public void onFinish() {
			// TODO Auto-generated method stub
	        TextView result = (TextView) findViewById(R.id.txtResult);
	        result.setText("Finished!");
		}

		@Override
		public void onTick(long remain) {
			// TODO Auto-generated method stub
	        TextView result = (TextView) findViewById(R.id.txtResult);
	        int timeRemain = (int) (remain) / 1000;
	        result.setText(" Current : " + timeRemain);
		}

	}

}