Google Android - это несложно

Код: Выделить всё

public interface onMainMenuListener
    {
        public void onButtonClickEvent(int i);
    }

    onMainMenuListener mainMenuListener;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);

        try {

            Activity activity;
            if (context instanceof Activity){
                activity=(Activity) context;

            mainMenuListener = (onMainMenuListener) activity;

            }

        }
        catch (ClassCastException e)
        {
            throw new ClassCastException(context.toString()+" must implement onMainMenuListener");
        }
    }

Код: Выделить всё

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View v=inflater.inflate(R.layout.mainmenu_fragment,container,false);
        Button trainButton = (Button) v.findViewById(R.id.button_train);
        trainButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                [color=#BF0000]mainMenuListener.onButtonClickEvent(1);[/color]
            }
        });


        Button youtubeButton = (Button) v.findViewById(R.id.button_youtube);
        youtubeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                [color=#BF0000]mainMenuListener.onButtonClickEvent(2);[/color]
            }
        });


        return v;
    }