Fragment

@Override
    public void onResume() {
        super.onResume();
        
        MainActivity context = ((MainActivity) getSherlockActivity());
        // hide "custom" button when category filter has not been customized

        int filter = Global.getInstance(context).getCatFilterMask() & context.MASK_ALL;
        Log.d(Global.LOG_TAG, "onResume() filter: " + filter);
        if (filter == MASK_FOOD || filter == MASK_SHOP || filter == MASK_LODGE
                || filter == MASK_ALL)
            bt.setVisibility(View.GONE);
        else
            bt.setVisibility(View.VISIBLE);
    }

fragmentactivity

    private static final int MASK_ALL = 0x3ff;
    private static final int MASK_FOOD = 0x00f;
    private static final int MASK_SHOP = 0x050;
    private static final int MASK_LODGE = 0x100;