How to use count in ormlite

    List<HoraireDb> horaires_reels = null;
    try {   
    Dao<HoraireDb, Integer> dao = App.getHelper().getHoraireDao();
    QueryBuilder<HoraireDb, Integer> builder = dao.queryBuilder();
    Where where = builder.where();
    where.eq("isprevis", false);
    where.and();
    where.eq("idactivite", Param.getIdActivite(App.getContext()));
    where.and();
    where.eq("jour",moment);
    where.and();
    where.isNotNull("debut");
    where.and();
    where.isNotNull("fin");
    where.and();
    where.ne("etat", "D");
    where.and();
    where.isNull("idabsence");
    where.and();
    where.lt("fin",moment);

    horaires_reels = dao.query(builder.prepare());
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

i want to return an int just the number of rows, because returning a list take much time, i want to know there's any way to use countof() for my code ???

i found in stackoverflow this answer but didn't work for me :

int numRows = dao.queryBuilder().where().eq("name", "Joe Smith").countOf();