[英]PHP/AndroidStudio - Make a post by getting the current user logged in as foreign key
我正在嘗試制作新聞應用程序，我需要注冊新聞並獲取當前登錄用戶的ID作為PHP文件的參數。
我已經有登錄/注銷系統，並將其保存在“共享首選項”文件中。
我之所以問是因為我沒有足夠的知識來了解如何使用PHP和Android Studio實現這一目標。
這是我的文件，我只需要向正確的方向指出，即使是將來的參考，最好的方法是什么？
如果您願意提供幫助，請先謝謝您。
常數
public class Constants {
private static final String ROOT_URL = "http://localhost/android/v1/";
public static final String URL_REGISTER = ROOT_URL+"registerUser.php";
public static final String URL_LOGIN = ROOT_URL+"userLogin.php";
}
DBO操作
<?php
class DBOperations{
private $con;
private $res;
function __construct(){
require_once dirname(__FILE__).'/DBConnect.php';
$db = new DBConnect();
$this->con = $db->connect();
}
/*CRUD -> C -> CREATE */
public function createUser($username, $password, $email){
if($this->isUserRegistered($username,$email)){
return 0;
}else{
$stmt = $this->con->prepare("INSERT INTO `users` (`id`, `username`, `password`, `email`) VALUES (NULL, ?, ?, ?);");
$stmt->bind_param("sss",$username,$password,$email);
if($stmt->execute()){
return 1;
}else{
return 2;
}
}
}
public function registerNews($news_post, $user_FK){
$stmt = $this->con->prepare("INSERT INTO `news` (`id`, `news_post`, `user_FK`) VALUES (NULL, ?, ?);");
$stmt->bind_param("sss",$news_post,$user_FK);
if($stmt->execute()){
return 1;
}else{
return 2;
}
}
}
DBRegisterUser
<?php
require_once '../includes/DBOperations.php';
$response = array();
if($_SERVER['REQUEST_METHOD']=='POST'){
if(
isset($_POST['username']) and
isset($_POST['email']) and
isset($_POST['password']))
{
//operate the data further
$db = new DBOperations();
$result = $db->createUser( $_POST['username'],
$_POST['password'],
$_POST['email']
);
if($result == 1){
$response['error'] = false;
$response['message'] = "User registered successfully";
}elseif($result == 2){
$response['error'] = true;
$response['message'] = "Some error occurred please try again";
}elseif($result == 0){
$response['error'] = true;
$response['message'] = "It seems you are already registered, please choose a different email and username";
}
}else{
$response['error'] = true;
$response['message'] = "Required fields are missing";
}
}else{
$response['error'] = true;
$response['message'] = "Invalid Request";
}
echo json_encode($response);
DBRegisterNews（不知道如何更改此設置）
<?php
require_once '../includes/DBOperations.php';
$response = array();
if($_SERVER['REQUEST_METHOD']=='POST'){
if(
isset($_POST['userid']) and
isset($_POST['email']) and
isset($_POST['password']))
{
//operate the data further
$db = new DBOperations();
$result = $db->registerNews($_POST['userid'],
$_POST['password'],
$_POST['email']
);
if($result == 1){
$response['error'] = false;
$response['message'] = "News registered successfully";
}elseif($result == 2){
$response['error'] = true;
$response['message'] = "Some error occurred please try again";
}
}else{
$response['error'] = true;
$response['message'] = "Required fields are missing";
}
}else{
$response['error'] = true;
$response['message'] = "Invalid Request";
}
echo json_encode($response);
注冊（供參考，正在運行）
public class SignUpActivity extends AppCompatActivity {
private TextInputEditText editTextUsername, editTextEmail, editTextPassword, editTextConfirmPassword;
private ProgressBar bar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_up);
editTextUsername = findViewById(R.id.editTextLoginUsername);
editTextEmail = findViewById(R.id.editTextEmail);
editTextPassword = findViewById(R.id.editTextLoginPassword);
editTextConfirmPassword = findViewById(R.id.editTextConfirmPassword);
bar = findViewById(R.id.progressBar);
bar.setVisibility(View.GONE);
}
public void registerUser(View view) {
final String username = editTextUsername.getText().toString();
final String email = editTextEmail.getText().toString();
final String password = editTextPassword.getText().toString();
final String confirmPassword = editTextConfirmPassword.getText().toString();
if (password.equals(confirmPassword) || confirmPassword.equals(password)) {
bar.setVisibility(View.VISIBLE);
StringRequest stringRequest = new StringRequest(Request.Method.POST,
Constants.URL_REGISTER,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
bar.setVisibility(View.GONE);
try {
JSONObject jsonObject = new JSONObject(response);
Toast.makeText(getApplicationContext(), jsonObject.getString("message"),
Toast.LENGTH_LONG).show();
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
bar.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "Erro: " + error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("username", username);
params.put("email", email);
params.put("password", password);
return params;
}
};
RequestHandler.getInstance(getApplicationContext()).addToRequestQueue(stringRequest);
} else {
Toast.makeText(getApplicationContext(), "Senhas não conferem, tente novamente", Toast.LENGTH_LONG).show();
}
}
}
PostNews（我需要在此處進行一些更改）
public class PostNews extends AppCompatActivity {
private Button btnpostar;
private EditText editTextNewsPost, editTextUserFK;
private ProgressBar bar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post_news);
editTextNewsPost = findViewById(R.id.EditTextNewsPost);
btnpostar = findViewById(R.id.btnPostar);
}
public void salvarNoticia(View view) {
final String post = editTextNewsPost.getText().toString();
if (!post.equals("")) {
bar.setVisibility(View.VISIBLE);
StringRequest stringRequest = new StringRequest(Request.Method.POST,
Constants.URL_REGISTER,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
bar.setVisibility(View.GONE);
try {
JSONObject jsonObject = new JSONObject(response);
Toast.makeText(getApplicationContext(), jsonObject.getString("message"),
Toast.LENGTH_LONG).show();
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
bar.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "Erro: " + error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
return params;
}
};
RequestHandler.getInstance(getApplicationContext()).addToRequestQueue(stringRequest);
} else {
Toast.makeText(getApplicationContext(), "Por favor, não poste nada em branco", Toast.LENGTH_LONG).show();
}
}
}
共享首選項
public class SharedPrefManager {
private static SharedPrefManager mInstance;
private static Context mCtext;
private static final String SHARED_PREF_NAME = "myname";
private static final String KEY_USERNAME = "username";
private static final String KEY_USER_EMAIL = "useremail";
private static final String KEY_USER_ID = "userid";
private SharedPrefManager(android.content.Context context){
mCtext = context;
}
public static synchronized SharedPrefManager getInstance(Context context){
if (mInstance == null) {
mInstance = new SharedPrefManager(context);
}
return mInstance;
}
public boolean userLogin(int id, String username, String email){
SharedPreferences sharedPreferences = mCtext.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putInt(KEY_USER_ID, id);
editor.putString(KEY_USER_EMAIL, email);
editor.putString(KEY_USERNAME, username);
editor.apply();
return true;
}
public boolean isLoggedin(){
SharedPreferences sharedPreferences = mCtext.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
if (sharedPreferences.getString(KEY_USERNAME,null) != null){
return true;
}
return false;
}
public boolean logout(){
SharedPreferences sharedPreferences = mCtext.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.clear();
editor.apply();
return true;
}
public String getUsername(){
SharedPreferences sharedPreferences = mCtext.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(KEY_USERNAME, null);
}
public String getUserEmail(){
SharedPreferences sharedPreferences = mCtext.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(KEY_USER_EMAIL, null);
}
}
如果用戶已經注冊，則可以在此處返回用戶ID：
public function createUser($username, $password, $email){
if($this->isUserRegistered($username,$email)){
//return 0; <-- do not return 0
$userID = ...//get user id from db using $username and $email
return $userID;
}else{
如果您操作返回的值，則可以將代碼更改為以下內容，並將userID添加到響應中：
$result = $db->createUser( $_POST['username'],
$_POST['password'],
$_POST['email']
);
if($result == -1){
$response['error'] = false;
$response['message'] = "User registered successfully";
}elseif($result == -2){
$response['error'] = true;
$response['message'] = "Some error occurred please try again";
}elseif($result > 0){
$response['error'] = true;
$response['message'] = "It seems you are already registered, please choose a different email and username";
$response['userID'] = $result;
}
抓取當前登錄用戶的用戶ID並將其添加為其他表中的外鍵值將返回null-MySQL-CodeIgniter
[英]Grabbing user id of current logged user and add it as foreign key value in a different table returns null - MySQL - CodeIgniter
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