El inicio de sesión de Android con el objeto json está vacío en la búsqueda incluso si la ejecución de archivos php en el navegador Chrome está bien

Sigue mi clase de búsqueda

public class fetchUserDataAsyncTask extends AsyncTask<Void, Void, User> { User user; GetUserCallback userCallBack; public fetchUserDataAsyncTask(User user, GetUserCallback userCallBack) { this.user = user; this.userCallBack = userCallBack; } @Override protected User doInBackground(Void... params) { ArrayList<NameValuePair> dataToSend = new ArrayList<>(); dataToSend.add(new BasicNameValuePair("username", user.username)); dataToSend.add(new BasicNameValuePair("password", user.password)); HttpParams httpRequestParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpRequestParams, CONNECTION_TIMEOUT); HttpConnectionParams.setSoTimeout(httpRequestParams, CONNECTION_TIMEOUT); HttpClient client = new DefaultHttpClient(httpRequestParams); HttpPost post = new HttpPost(SERVER_ADDRESS + "FetchUserData.php"); User returnedUser = null; try { post.setEntity(new UrlEncodedFormEntity(dataToSend)); HttpResponse httpResponse = client.execute(post); HttpEntity entity = httpResponse.getEntity(); String result = EntityUtils.toString(entity); JSONObject jObject = new JSONObject(result); if (jObject.length() != 0){ Log.v("happened", "2"); String name = jObject.getString("name"); int age = jObject.getInt("age"); returnedUser = new User(name, age, user.username, user.password); } } catch (Exception e) { e.printStackTrace(); } return returnedUser; } @Override protected void onPostExecute(User returnedUser) { super.onPostExecute(returnedUser); progressDialog.dismiss(); userCallBack.done(returnedUser); } } 

Php buscar el archivo Fetch_User_Data.php

 <?php $con=mysqli_connect("localhost","root","","loginregister"); if (mysqli_connect_errno($con)) { echo "Failed to connect to MySQL: " , mysqli_connect_error(); } if (isset($_POST["password"])) {$password = $_POST ["password"];}else $password = 'bimbomix'; if (isset($_POST["username"])) {$username = $_POST ["username"];}else $username = 'bimbomix'; $statement = mysqli_prepare($con, "SELECT * FROM user WHERE username = ? AND password = ?"); mysqli_stmt_bind_param($statement, "ss", $username, $password); mysqli_stmt_execute($statement); mysqli_stmt_store_result($statement); mysqli_stmt_bind_result($statement, $user_id, $name, $age, $username, $password); $user = array(); while(mysqli_stmt_fetch($statement)){ $user['name'] = $name; $user['age'] = $age; $user['username'] = $username; $user['password']= $password; } echo json_encode($user); mysqli_close($con); ?> 

Prueba Hardcoding

  User returnedUser=null; try { post.setEntity(new UrlEncodedFormEntity(dataToSend)); HttpResponse httpResponse = client.execute(post); HttpEntity entity = httpResponse.getEntity(); String result = EntityUtils.toString(entity); //until here hardcoding fills correctly returnedUser JSONObject jObject = new JSONObject(result); returnedUser = new User("hello", 42, user.username, user.password); // this is hardcoded string that let returnedUser ==null // so perhaps problem is in jObject if (jObject.length() != 0){ Log.v("happened", "2"); String name = jObject.getString("name"); int age = jObject.getInt("age"); // returnedUser = new User(name, age, user.username, user.password); } } catch (Exception e) { e.printStackTrace(); } return returnedUser; } 

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