public function readinappAction()
 {
     $data = array();
     if ($device_uid = $this->getRequest()->getParam('device_uid') and $device_type = $this->getRequest()->getParam('device_type')) {
         $message = new Push_Model_Message();
         $message->markInAppAsRead($this->getApplication()->getId(), $device_uid, $device_type);
         $data = array("message" => "Success.");
     }
     $this->_sendHtml($data);
 }