How to use TimerTask in Android?

public class Test extends Activity {
    /** Called when the activity is first created. */
Timer myTimer=null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        MyTimerTask myTask = new MyTimerTask();
        myTimer = new Timer();
        myTimer.schedule(myTask, 3000, 1500);
       
        Button b=(Button)findViewById(R.id.button1);
     
        b.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub

myTimer.cancel();
System.out.println("Cancel the timer...");

}
});
       
     
       
    }
   
   
    class MyTimerTask extends TimerTask {
   public void run() {
   // ERROR
     System.out.println("TimerTask is running......");
   }
  }
}