HBuilder开发app ajax跨域 解决XMLHttpRequest

<div id="a1" onclick="testXHR()" style="font-size: 5em;">sss1</div>

   < script type = "text/javascript" >

         var url = 'http://192.168.0.122/lxty/index.php/index/index/testajax';

           var data;

           var xhr=null;          

           function testXHR(){

               if(xhr){

                   return;

               }

               xhr=new plus.net.XMLHttpRequest();

               xhr.onreadystatechange=xhrStatechange;

               xhr.open( "GET", url);

               xhr.send();

           }

           function xhrStatechange(){

               if (xhr.readyState==4&&xhr.status == 200) {

                   

               

                       data = JSON.parse(xhr.responseText);

                   

                       

                   

            

                           

                       //alert(data.a1)   

                       for(i in data){alert(data[i])}

                                              

               

               }

           }

           

</ script >