I am developing a game in android, by extending a class with view. I have integrated OpenFeint in it by studying the tutorial provided on the OpenFeint site, but I am not able to add the leaderboard feature in my app. How can I achieve it?

My game class is like this

public class GameActivity extends Activity {  

Intent i;

Grapic g;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);           

    setContentView(new Grapic(this));

and Grapic is a class which extends view and where scoring is done with touch events.