json - list view did not show any value in android studio -

currently i'm try develop project using php , android studio. i'm using list view. have google other tutorial did not found answer , still have problem using list view.

05-30 23:10:15.592    7820-7849/com.example.ayim.madoc d/all products:﹕ {"success":1,"patient":[{"id":"1","name":"ikhwan johari"},{"id":"2","name":"ruminah bedah"},{"id":"3","name":"kamal sado"}]} 05-30 23:10:15.592    7820-7849/com.example.ayim.madoc w/system.err﹕ org.json.jsonexception: no value idpatient 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ org.json.jsonobject.get(jsonobject.java:354) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ org.json.jsonobject.getstring(jsonobject.java:510) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ com.example.ayim.madoc.listpatient$loadallpatient.doinbackground(listpatient.java:112) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ com.example.ayim.madoc.listpatient$loadallpatient.doinbackground(listpatient.java:69) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ android.os.asynctask$2.call(asynctask.java:287) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ java.util.concurrent.futuretask.run(futuretask.java:234) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ android.os.asynctask$serialexecutor$1.run(asynctask.java:230) 05-30 23:10:15.593    7820-7849/com.example.ayim.madoc w/system.err﹕ @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1080) 05-30 23:10:15.594    7820-7849/com.example.ayim.madoc w/system.err﹕ @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:573) 05-30 23:10:15.594    7820-7849/com.example.ayim.madoc w/system.err﹕ @ java.lang.thread.run(thread.java:838) 

here stack shows. value database fetch did not display in list view. don't know how fixed this. can me?

im still new in android studio. thank you.

here code in java.

public class listpatient extends listactivity {      //string intentid = getintent().getextras().getstring("id");     // progress dialog     private progressdialog pdialog;      // creating json parser object     jsonparser jparser = new jsonparser();      arraylist<hashmap<string, string>> patientlist;      jsonarray patient = null;      textview idshow;      private static final string list_url = "http://104.223.3.210/madoc/all_patient.php";       @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_list_patient);             idshow = (textview) findviewbyid(r.id.id);         idshow.settext(getintent().getextras().getstring("id"));           // hashmap listview         patientlist = new arraylist<hashmap<string, string>>();          // loading products in background thread         new loadallpatient().execute();          // listview         listview lv = getlistview();     }        class loadallpatient extends asynctask<string, string, string> {           @override         protected void onpreexecute() {             super.onpreexecute();             pdialog = new progressdialog(listpatient.this);             pdialog.setmessage("loading products. please wait...");             pdialog.setindeterminate(false);             pdialog.setcancelable(false);             pdialog.show();         }          @override         protected string doinbackground(string... params) {                try {                  list<namevaluepair> paras = new arraylist<namevaluepair>();                 // getting json string url                 paras.add(new basicnamevaluepair("id", getintent().getextras().getstring("id")));                 jsonobject json1 = jparser.makehttprequest(list_url, "post", paras);                 log.d("all products: ", json1.tostring());                  // checking success tag                 int success = json1.getint("success");                  if (success == 1) {                      patient = json1.getjsonarray("patient");                      // looping through products                     (int = 0; < patient.length(); i++) {                         jsonobject c = patient.getjsonobject(i);                          // storing each json item in variable                         string id = c.getstring("idpatient");                         string name = c.getstring("name");                          // creating new hashmap                         hashmap<string, string> map = new hashmap<string, string>();                          // adding each child node hashmap key => value                         map.put("id", id);                         map.put("name", name);                          // adding hashlist arraylist                         patientlist.add(map);                     }                 } else {                       idshow.settext("no patient");                 }             } catch (jsonexception e) {                 e.printstacktrace();             }               return null;         }          protected void onpostexecute(string file_url) {             // dismiss dialog after getting products             pdialog.dismiss();             // updating ui background thread             runonuithread(new runnable() {                 public void run() {                     /**                      * updating parsed json data listview                      * */                     listadapter adapter = new simpleadapter(                             listpatient.this, patientlist,                             r.layout.list_patient, new string[] { "id",                             "name"},                             new int[] { r.id.id, r.id.name });                     // updating listview                     setlistadapter(adapter);                 }             });          }     }  } 

exception thrown here:

string id = c.getstring("idpatient"); 

there no "idpatient" key in json. try replace "id"