realtime javascript request from android or call javascript function from Controller Cakephp/php -

i have loader in user panel waiting response user's mobile device. unfortunately i'm compeletly blank on how request mobile device, , update page content real time.

right problem have sending data view page controller function through ajax .... in controller function sending data ajax function other function in utility class , returning result ajax function.... , whenever receive response controller function starting loader/preloader/ajax spinner ... after sending variable android ... after android response comes want stop loader ... dont know how call ajax function , response controller

there can 2 ways acheive

1st either call directly javascript function android , grab value . 2nd or call javascript function controller , send value in ajax function ..dont know if possible ...

my js function

function openprompt() {   var cancelled = true;   var lock='lock';    $.modal.prompt('enter message :', function(value)     {    $.ajax({    type:"post",   data:{value:value,lock:lock},   url:"/allsecure/api/lock/",   success : function(data) {    //start spinner   },    error : function() {        alert("error");  }     });       }, function()       {      });      }; 

controller function

   public function lock(){      if( $this->request->is('ajax') ) {         $message = $this->request->data('value');          $lock = $this->request->data('lock');         $this->loadmodel('userinfo');         $userid =  $this->auth->user('iduser');           $key = $this->userinfo->getkey($userid);          $apikey = "1234567890";        $resp = allsecure::sendnotification($apikey, array($key), array('message' =>  $lock, 'tickertext' =>$message));        echo $resp; //after response starting loader       } }        function android(){           // here getting variable android           $json = $this->request->data('json');         $data = json_decode($json, true);                openprompt()//here want call javascript function , want send value of  android javascript              } 

or there better approach ???

if want execute client javascript server can similar thing jsonp does. response json data wrap in javascript function executed in client.