向下刷新无响应什么情况，在HB编辑器可以向下刷新，安卓上不行，求指教

```<script type="text/javascript">  

            mui.init({  
              pullRefresh : {  
                container:'#refreshContainer',  
                down : {  
                    height:'30',  
                    contentdown:'下拉刷新',  

                  callback :pullfresh_function,  
                },  

              }  
            });  

        function    pullfresh_function(){  

    mui('#refreshContainer').pullRefresh().endPulldownToRefresh();  
            }  
        </script>