can some one please please , i cant get it, i dont know why now, the videos say this the task asks the opposite, help me

public class TwitterService extends Service {
  TwitterClient twitterClient = new TwitterClient();    
  private TwitterHandler twitterHandler;
  @Override
  public void onCreate () {
    TwitterThread twitterThread = new TwitterThread ();
    twitterThread.start();

    twitterHandler = twitterThread.twitterHandler;
  }

  @Override
  public IBinder onBind (Intent intent) {
    return null;

  }


  @Override
 public int onStartCommand (Intent intent, int flags, int startId) {

    Message message = Message.obtain();
    twitterThread.sendMessage (message);
    return START_REDELIVER_INTENT;

  }

  class TwitterThread extends Thread {
    TwitterHandler twitterHandler;
    @Override
    public void run() {
      Looper.prepare();
      twitterHandler = new TwitterHandler();
      Looper.loop();
    }
  }    

  class TwitterHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {
      twitterClient.update();
    }
  }
}

public class MainActivity extends Activity {
  Button button;   

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

    button = (Button) findViewById(R.id.update_button);
    button.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v){

      }
    });
  }
}