oki now i get the val of action by passing it in the list.php line 132 in aapprove directory

<a class="btn_publish" href="<?php echo JRoute::_('index.php?option='.APP_NAME.'&view=aapproval&task=approve&cid='.$answer->id.'&action=2');?>" onclick="return false;" title="<?php echo JText::_('MSG_CLICK_PUBLISH');?>">

and in list.php at line 90 in the approve directory

$publishUrl = JRoute::_( 'index.php?option='.APP_NAME.'&view=approval&action=1&task=publish&cid[]='. $row->id );

after that i added in the StreamActivity function in helper.php file the following line:

 $action = JRequest::getVar('action', '', '', 'int');

now left to select the good user for those two cases