Android Login with php getting error after successful json parsing -

hi getting error if login correct user name , password.but json response correct showing user not found.where need change code. in advance. getting success json data if login correct user name , password else failure response getting every time showing user not found error.

 login extends activity {         button b;         edittext et,pass;         textview tv;         @suppresswarnings("deprecation")         httppost httppost;         stringbuffer buffer;         @suppresswarnings("deprecation")         httpresponse response;         @suppresswarnings("deprecation")         httpclient httpclient;         @suppresswarnings("deprecation")         list<namevaluepair> namevaluepairs;         progressdialog dialog = null;          @override         public void oncreate(bundle savedinstancestate) {             super.oncreate(savedinstancestate);             setcontentview(r.layout.login);              b = (button)findviewbyid(r.id.button01);               et = (edittext)findviewbyid(r.id.username);             pass= (edittext)findviewbyid(r.id.password);             tv = (textview)findviewbyid(r.id.tv);              b.setonclicklistener(new onclicklistener() {                 @override                 public void onclick(view v) {                     dialog = progressdialog.show(login.this, "",                              "validating user...", true);                      new thread(new runnable() {                             public void run() {                                 login();                                                       }                           }).start();                                }             });         }          @suppresswarnings("deprecation")         void login(){             try{                              httpclient=new defaulthttpclient();                 httppost= new httppost("http://192.168.137.224/android_connect/get_product_details.php"); // make sure url correct.                 //add data                 namevaluepairs = new arraylist<namevaluepair>(2);                 // use same variable name posting i.e android side variable name , php side variable name should similar,                  namevaluepairs.add(new basicnamevaluepair("name",et.gettext().tostring().trim()));  // $edittext_value = $_post['edittext_value'];                 namevaluepairs.add(new basicnamevaluepair("password",pass.gettext().tostring().trim()));                  httppost.setentity(new urlencodedformentity(namevaluepairs));                 //execute http post request                 response=httpclient.execute(httppost);                 // edited james coderzheaven.. here....                 responsehandler<string> responsehandler = new basicresponsehandler();                 final string response = httpclient.execute(httppost, responsehandler);                 system.out.println("response : " + response);                  runonuithread(new runnable() {                     public void run() {     //                    tv.settext("response php : " + response);                         dialog.dismiss();                     }                 });                 if(response.equalsignorecase("yes"))                  {                     runonuithread(new runnable() {                         public void run() {                             toast.maketext(login.this,"login success", toast.length_short).show();                         }                     });                      startactivity(new intent(login.this, otheractivty.class));                 }else{                     showalert();                                 }              }catch(exception e){                 dialog.dismiss();                 system.out.println("exception : " + e.getmessage());             }         }         public void showalert(){             login.this.runonuithread(new runnable() {                 public void run() {                     alertdialog.builder builder = new alertdialog.builder(login.this);                     builder.settitle("login error.");                     builder.setmessage("user not found.")                              .setcancelable(false)                            .setpositivebutton("ok", new dialoginterface.onclicklistener() {                                public void onclick(dialoginterface dialog, int id) {                                }                            });                                          alertdialog alert = builder.create();                     alert.show();                                }             });         }     } 

use http://www.java2s.com/code/jardownload/java-json/java-json.jar.zip library!

first of all, json not proper!

proper json: { "success": "yes", "message": "logged in" }

second use retrieve contents of "success" variable:

    jsonobject myjson = new jsonobject(response);     system.out.println(myjson.getstring("success"));