interface SaveScore {
   public void saveScore(int score);
}

public class SaveScoreAndroid implements SaveScore {
    public void saveScore(int score) {
        //Platform specific code goes here
    }
}

protected void onCreate (Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();
    initialize(new MyGame(new SaveScoreAndroid()), config);
}