Android Timer and UI threads

In the past few days I was trying to create a daemonized timer without too much luck, then after sweating blood I managed to come up with the following code:

public class SampleTimer extends Activity {

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle icicle) {
  super.onCreate(icicle);
  setContentView(R.layout.yourlayout);

  // we create a new timer
  // arg0 -- String - The timer's name
  // arg1 -- Boolean- Whether the timer should be daemonized
  Timer timer = new Timer("MyTimerName", true);

  timer.schedule(new TimerTask() {
   @Override
   public void run() {
    // method to repeat
    SampleMethod();
   }
  // initial delay is 0 seconds
  // and SampleMethod() will run every
  // 1.8 million milliseconds (30mins)
  }, 0, 1800000);
 }

 private void SampleMethod(){
  // we run a new worker thread on the UI thread
  this.runOnUiThread(worker);
 }

 private Runnable worker = new Runnable() {
  public void run() {
   // do some checks then send notification (upcoming post)
  }
 };
}

This piece of code, without the class container, is actually used in another background thread (in a class which extends Activity and implement Runnable).  I bet if a long-time Java programmer would see my code, would cut my throat, but hey, it works :)