Android - JSONException parsing data - php

Question

My "nhanvien" table has 3 columns : "id", "Maso", "Hoten". I use the code below to get all data from this table but I've got an error.
<?php
// get all nhanvien from nhanvien table
$response = array();
require_once __DIR__ . '/db_connect.php';
$db = new DB_CONNECT();
$result = mysql_query("SELECT *FROM nhanvien") or die(mysql_error());
// looping through all results
// nhanvien node
if (mysql_num_rows($result) > 0) {
$response["nhanvien"] = array();
while ($row = mysql_fetch_array($result)) {
$nhanvien = array();
$nhanvien ["id"] = $row["id"];
$nhanvien ["Maso"] = $row["Maso"];
$nhanvien ["Hoten"] = $row["Hoten"];
array_push($response["nhanvien"], $nhanvien);
}
$response["success"] = 1;
echo json_encode($response);
} else {
$response["success"] = 0;
$response["message"] = "No nhanvien found";
echo json_encode($response);
?>
I have this error :
Error parsing data org.json.JSONException: Value Connected of type java.lang.String cannot be converted to JSONObject
Here is my android code:
try {
URL murl = new URL(url);
URLConnection urlConnection = murl.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(),"UTF-8"));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
reader.close();
json = sb.toString();
Log.d("connect...", json.toString());
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(new String(json));
Log.d("parse...", jObj.toString());
} catch (JSONException e) {
Log.e("JSON Parser 123", "Error parsing data " + e.toString());
//Log.e("JSON Parser", "Error parsing data [" + e.getMessage()+"] "+json);
}
// return JSON String
return jObj;
}