如何将用户 ID 从 PHP 传递到 Android（共享首选项）

Question

我正在制作一个与我的网站共享相同数据库的应用。我在整个活动中保持登录会话，并且可以获得用户名，但是如何从正在登录的用户那里获取用户 ID（PK）？我已经很好地创建了所有表，并且可以通过应用程序和网站与数据库进行通信。请帮帮我

//PHP文件

if($_SERVER['REQUEST_METHOD']=='POST'){
    //Getting values 
    $email = $_POST['email'];
    $password = $_POST['password'];


    //Creating sql query
    $sql = "SELECT * FROM Utilizadores WHERE email='$email' AND password='$password'";

    //importing dbConnect.php script 
    require_once('connection.php');

    //executing query
    $result = mysqli_query($con,$sql);


    //fetching result
    $check = mysqli_fetch_array($result);

    //if we got some result 
    if(isset($check)){

        //displaying success 
        echo "success";
    }else{
        //displaying failure
        echo "failure";
    }
    mysqli_close($con);
}

//安卓文件

public class Config {

    //URL to our login.php file
    public static final String LOGIN_URL = "http://192.168.1.43/Teste/login.php";

    //Keys for email and password as defined in our $_POST['key'] in login.php
    public static final String KEY_EMAIL = "email";
    public static final String KEY_PASSWORD = "password";
    public static final String KEY_ID = "id_utilizador";


    //If server response is equal to this that means login is successful
    public static final String LOGIN_SUCCESS = "success";

    //Keys for Sharedpreferences
    //This would be the name of our shared preferences
    public static final String SHARED_PREF_NAME = "myloginapp";

    //This would be used to store the email of current logged in user
    public static final String EMAIL_SHARED_PREF = "email";

    //This would be used to store the id of current logged in user
    public static final String ID_SHARED_PREF = "id_utilizador";

    //We will use this to store the boolean in sharedpreference to track user is loggedin or not
    public static final String LOGGEDIN_SHARED_PREF = "loggedin";
}

Answer 1

据我了解，您希望检索服务器端变量（用户 ID）。 如果登录成功，您可以让服务器输出该变量，然后解析来自 Android 应用的服务器响应。