json - How to use the ion library in Android? -

i using ion library download json object response php web services. using way :

ion.with(getactivity())             .load("http://amd.com/loginservice.php")             .progressbar(progressbar).progress(new progresscallback() {         @override         public void onprogress(long downloaded, long total) {             int mprogress = (int) (100 * downloaded / total);             progressbar.setprogress(mprogress);         }     })             .setmultipartparameter("fb_id", id)             .setmultipartparameter("fb_token", accesstoken.getcurrentaccesstoken().tostring())             .asjsonobject()             .setcallback(new futurecallback<jsonobject>() {                 @override                 public void oncompleted(exception e, jsonobject result) {                     if (result == null) {                         toast.maketext(getactivity(), "error", toast.length_short).show();                         progressbar.setvisibility(view.gone);                     } else {                           log.v("ionresult", result.tostring());                         progressbar.setvisibility(view.gone);                      }                 }             }); 

now want ask 2 questions:

1. how can show "please wait" , progress bar in manner? progress bar should appear , disappear when response of server has been achieved.

2. how parse json getting in response? have logged results

   log.v("ionresult", result.tostring());

and can see response, how can use , parse , items want?

please help, know basic question, beginner in android, please me improve. thanks.

i started using ion recently, i'm not sure if best way (please, if know, leave comment here!).

so, i'm using callbacks return value class.

public interface responsecallback {      public void onsuccess(string result);      public void onerror(string result);  } 

one example in code:

public void getchats(final context context, final string url,final responsecallback responsecallback) {    ion.with(context)          .load(url)         .asstring()         .setcallback(new futurecallback<string>() {             @override             public void oncompleted(exception e, string result) {                 if (e != null) {                     if (responsecallback != null) {                         responsecallback.onerror(e.tostring());                     }                     toast.maketext(context, "error loading chat list.", toast.length_short);                     return;                 }                  if (responsecallback != null) {                     responsecallback.onsuccess(result);                 }             }         }); } 

so, when call getchats(), implement responsecallback methods. hope helps, think there's better way that.