java - Passing data between android and server using JSON parsing -

i'm trying send , receive data between android app , server using json unfortunately unable searched lot didn't help. code follows:

in android

try {         jsonobject jsonobject = new jsonobject();         jsonobject.put("fromdate", from);         jsonobject.put("todate", to);         jsonobject.put("reason", reas);         new senddata().execute(jsonobject);     } catch (jsonexception e) {         // todo auto-generated catch block         e.printstacktrace();     } 

and asynctask's doinbackground method

try {                 httpparams httpparams = new basichttpparams();                 httpconnectionparams.setconnectiontimeout(httpparams,                         cmsinter.timeout);                 httpconnectionparams.setsotimeout(httpparams, cmsinter.timeout);                 httpclient client = new defaulthttpclient(httpparams);                 httppost httppost = new httppost(getresources().getstring(                         r.string.url));                 stringentity se = new stringentity(object.tostring());                 se.setcontenttype(new basicheader(http.content_type,                         "application/json"));                 httppost.setentity(se);                 httpresponse response = client.execute(httppost);                 message = sync.convertresponsetostring(response);             } catch (exception e) {                 e.printstacktrace();                 message = e.tostring();             } 

and on server side within dopost() method of servlet code follows :

protected void dopost(httpservletrequest request,             httpservletresponse response) throws servletexception, ioexception {             stringbuffer sb = new stringbuffer();             string line = null;             try {                 bufferedreader reader = request.getreader();                 while ((line = reader.readline()) != null)                     sb.append(line);             } catch (exception e) { /* report error */                 e.printstacktrace();             }             string str = sb.tostring();             try {                 org.json.jsonobject json = new org.json.jsonobject(str);             } catch (jsonexception e) {                 // todo auto-generated catch block                 e.printstacktrace();             } } 

and think not right way read jsonobject on server side because when run org.json.jsonexception: jsonobject text must begin '{' @ character 1 exception , can please me out in this. appreciated. thanks.

finally got line wrong object.tostring() while sending should have been object[0].tostring() because asynctask's doinbackground methods parameter array i.e. protected string doinbackground(jsonobject... object).