php - Value success of type java.lang.String cannot be converted to JSONObject -


i have listview in activity a. when long press detected, check whether id maximum. if yes, list deleted , list refreshed. otherwise display "list cannot deleted".

 listviewupdate.setonitemlongclicklistener(new adapterview.onitemlongclicklistener() {             public boolean onitemlongclick(final adapterview<?> p, view v, final int po, long id) {                  id = details1.get(po).getid();                 alertdialog.builder builder = new alertdialog.builder(getactivity());                 builder.settitle("delete");                 builder.setmessage("are sure want delete?");                 builder.seticon(android.r.drawable.ic_dialog_alert);                 builder.setpositivebutton("yes", new dialoginterface.onclicklistener() {                     public void onclick(dialoginterface dialog, int ii) {                         checkmaxid(po,id,id);                         retrievetotalhours(id);                      }                 });                  builder.setnegativebutton("cancel", new dialoginterface.onclicklistener()                          {                             public void onclick(dialoginterface dialog, int ii) {                                 dialog.dismiss();                             }                         }                  );                 builder.show();                 return true;             }         });          return edit_details;     }      public void checkmaxid(final int po,final int foreignkey,final string id)     {         class check extends asynctask<void,void,string>{             // progressdialog loading;             @override             protected void onpreexecute() {                 super.onpreexecute();                 // loading = progressdialog.show(edit_staff.this,"updating...","wait...",false,false);             }              @override             protected void onpostexecute(string s) {                 super.onpostexecute(s);                 toast.maketext(getactivity(), s, toast.length_long).show();                 try{                     jsonobject json = new jsonobject(s);                     if(json.getboolean("success")){                         objadapter.removeitem(po);                         objadapter.notifydatasetchanged();                         toast.maketext(getactivity(), json.getstring("message"), toast.length_long).show();                         log.e("list", "deleted");                     }else{                         toast.maketext(getactivity(), json.getstring("message"), toast.length_long).show();                         log.e("list", " not deleted");                     }                 }catch(jsonexception ex){                     ex.printstacktrace();                     log.e("lisdsss","ex="+ex.tostring());                  }             }               @override             protected string doinbackground(void... params) {                 hashmap<string,string> hashmap = new hashmap<>();                 hashmap.put(configs.key_id, id);                 hashmap.put(configs.key_twd, string.valueof(foreignkey));                 requesthandler rh = new requesthandler();                 string s = rh.sendpostrequest(configs.url_check_id, hashmap);                 return s;             }         }        check ue = new check();         ue.execute();         }

php

<?php $json = array(); if(isset($_post['id'], $_post['twd'])){     /*importing our db connection script*/     require_once('dbconnect.php');     /* check connection */     if (mysqli_connect_errno()) {         printf("connect failed: %s\n", mysqli_connect_error());         exit();     }     $id = mysqli_real_escape_string($con, $_post['id']);     $twd = mysqli_real_escape_string($con, $_post['twd']);      $sql ="select max(id) maxid work_details twd = '$twd'";      if ($result = mysqli_query($con, $sql)) {         /* fetch associative array */         if ($row = mysqli_fetch_row($result)) {             if($row[0] === $id){                 $sql ="delete work_details id='$id';";                 if ($result = mysqli_query($con, $sql)) {                     echo 'success';                     $json['success'] = true;                     $json['message'] = 'delete successful';                 }else{                     $json['success'] = false;                     $json['message'] = 'list cannot deleted';                 }             }else                 echo 'list cannot deleted';                 $json['success'] = false;                 $json['message'] = '($row[0] !== $id)';                      }         } else{             $json['success'] = false;             $json['message'] = 'select unsuccessful';                     }     /* close connection */     mysqli_close($con);     }  ?>

the list has maximum id deleted in mysql, problem list not refreshing.

logcat

 e/lisdsss﹕ ex=org.json.jsonexception: value success of type java.lang.string cannot converted jsonobject

this ex.printstacktrace();, in catch block.

any appreciated.

there 2 methods solve this. method feel better or comfortable. @nikiole91 pointed out remove echo php script. print json output.

php

<?php $json = array(); if(isset($_post['id'], $_post['twd'])){     /*importing our db connection script*/     require_once('dbconnect.php');     /* check connection */     if (mysqli_connect_errno()) {         printf("connect failed: %s\n", mysqli_connect_error());         exit();     }     $id = mysqli_real_escape_string($con, $_post['id']);     $twd = mysqli_real_escape_string($con, $_post['twd']);      $sql ="select max(id) maxid work_details twd = '$twd'";      if ($result = mysqli_query($con, $sql)) {         /* fetch associative array */         if ($row = mysqli_fetch_row($result)) {             if($row[0] === $id){                 $sql ="delete work_details id='$id';";                 if ($result = mysqli_query($con, $sql)) {                     $json['success'] = true;                     $json['message'] = 'delete successful';                 }else{                     $json['success'] = false;                     $json['message'] = 'list cannot deleted';                 }             }else                 $json['success'] = false;                 $json['message'] = '($row[0] !== $id)';                      }         } else{             $json['success'] = false;             $json['message'] = 'select unsuccessful';                     }     /* close connection */     mysqli_close($con);     }     //print json     echo json_encode($json); ?>

now android code should work fine.


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