private void setTabSelection(int index) {
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        hideFragments(transaction);
        switch (index) {
        case 0:
            if (vipxcFragment == null) {
                vipxcFragment = new VipxcFragment();
                transaction.add(R.id.upgrade_content, vipxcFragment);
                
            } else {
                transaction.show(vipxcFragment);
            }
            break;
        case 1:
            if (viplyFragment == null) {
                viplyFragment = new ViplyFragment();
                transaction.add(R.id.upgrade_content, viplyFragment);
            } else {
                transaction.show(viplyFragment);
            }
            break;
        default:
            break;
        }
        transaction.commit();