java - QuickBlox get presence of user which isn't in the contacts -

i'm developing android chat application using quickblox.. app : user logs in , chooses user chat with.. (not in roster).. managed users using following code :

retrieveallusersfrompage(1);   private void retrieveallusersfrompage(int page){     qbpagedrequestbuilder pagedrequestbuilder = new qbpagedrequestbuilder();     pagedrequestbuilder.setpage(page);     pagedrequestbuilder.setperpage(100);      qbusers.getusers(pagedrequestbuilder, this); }  int usernumber = 1;  @override public void onsuccess(arraylist<qbuser> users, bundle params) {     for(qbuser user : users){         this.users.add(user);         usernumber ++;     }      int currentpage = params.getint(consts.curr_page);     int totalentries = params.getint(consts.total_entries);      if(usernumber < totalentries){         retrieveallusersfrompage(currentpage+1);     }  } 

but wanna filter them add available(online) users.. can't find way that.. idea ?

with no roster can use next trick user.lastrequestat field

http://quickblox.com/developers/simplesample-users-android#online.5coffline_status