public static void showTipIfNotShownYet(BaseFragment fragment, String tipText) {
   init(fragment.getActivity());
   PrefsHelper pHelper = new PrefsHelper(fragment.getActivity());
   if (!pHelper.isPrefExists(fragment.getClass().getName())) {
     pHelper.savePref(fragment.getClass().getName(), true);
     showTip(fragment.getActivity(), tipText, null, null);
   }
 }
 public static void showTipWithButtonsIfNotShownYet(
     BaseFragment fragment, String tipText, View.OnClickListener listener) {
   if (isJustLogined) {
     isJustLogined = false;
     return;
   }
   init(fragment.getActivity());
   PrefsHelper pHelper = new PrefsHelper(fragment.getActivity());
   if (pHelper.isPrefExists(fragment.getClass().getName())) {
     return;
   }
   pHelper.savePref(fragment.getClass().getName(), true);
   String title = fragment.getActivity().getString(R.string.tip_friend_list_button);
   showTip(fragment.getActivity(), tipText, listener, title);
 }