2016-11-22 21 views
0

我想通過服務器端PHP腳本連接我的libGDX(java)android項目與mySQL數據庫,以便使用POST方法實現登錄過程包括用戶名和密碼)。Android(libGDX)使用PHP服務器端腳本與mySQL的http連接

因此,我面臨着難以預料的問題。爲了您的信息,我在本地使用XAMPP和APACHE Web服務器。

我正面臨着什麼!有些時候,PHP腳本返回以下響應字符串,彷彿不認識的POST參數(儘管POST消息包括他們和包含的值(字符串的事實)!!):

<b>Notice</b>: Undefined index: username in <b>C:\xampp\htdocs\login\login.php</b> on line <b>5</b><br /> 
<br /> 
<b>Notice</b>: Undefined index: password in <b>C:\xampp\htdocs\login\login.php</b> on line <b>6</b><br /> 

一些其他的調試器(在Android studio上)可以顯示調試日誌,按下2-5次btnclickLogin()(如下所示)後會停止顯示任何日誌,該日誌會實現登錄活動。

這聽起來對我來說,http連接掛斷,也許點擊按鈕的監聽器不再響應!

更奇怪的是,有些時候相同的代碼,返回「成功」,一切工作正常。

Android的代碼是下一個

private void btnclickLogin() { 

//Getting values from edit texts 
    Gdx.app.setLogLevel(Application.LOG_DEBUG); 

    final String username = usernamefld.getText().toString().trim(); 
    final String password = passwordfld.getText().toString().trim(); 

    Map<String, String> parameters = new HashMap<String, String>(); 
    parameters.put("username", username); 
    parameters.put("password", password); 

    Gdx.app.debug("Login process started.", "Username=/" + username + "/ Password=/" + password + "/"); 

    HttpRequestBuilder requestBuilder = new HttpRequestBuilder(); 
    HttpRequest httpRequest; 

    httpRequest = requestBuilder.newRequest().method(Net.HttpMethods.POST).url("http://192.168.1.2/login/login.php").content(HttpParametersUtils.convertHttpParameters(parameters)).build(); 
    httpRequest.setHeader("Content-Type", "application/x-www-form-urlencoded"); 

    httpRequest.setTimeOut(6000); 

    Gdx.net.sendHttpRequest(httpRequest, new HttpResponseListener() { 
     @Override 
     public void handleHttpResponse(Net.HttpResponse httpResponse) { 
      String status = httpResponse.getResultAsString().trim(); 
      Gdx.app.debug("Return result by the server=", status); 

      if(status.contains("success")) 
       game.setScreen(new StartingScreen(game)); 
     } 

     @Override 
     public void failed(Throwable t) { 

      String status = "failed"; 
      Gdx.app.debug("Connection failed due to the next error:", t.getMessage()); 
     } 

     @Override 
     public void cancelled() { 
     } 
    }); 

    httpRequest.reset(); 
    Gdx.app.debug("Exiting", "From login button function"); 

} 

PHP腳本

對於login.php中

<?php 
if($_SERVER['REQUEST_METHOD']=='POST'){ 
    //Getting values 
    session_start(); 
    $username = $_POST['username']; 
    $password = $_POST['password']; 

//Creating sql query 
$sql = "SELECT * FROM users WHERE username='$username' AND password='$password'"; 

//importing dbConnect.php script 
require_once('dbConnect.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); }?> 

對於dbConnect.php

<?php 
    define('HOST',"localhost"); 
    define('USER',"root"); 
    define('PASS',""); 
    define('DB',"userlogging"); 
    $con = mysqli_connect(HOST,USER,PASS,DB) or die('Connection failed: ' . $conn->connect_error); 
    $con->set_charset("utf8"); ?> 

請舉個手克服這個問題並使http連接「穩定」!

非常感謝。

+0

你可以通過使用print_r($ _ SERVER)來檢查你在php腳本的$ _SERVER中獲得的所有值嗎? –

回答

0

Mishra對不起我的最新回覆。

是的,實際上我已經放置了一個print_r來查看PHP腳本的值,發現這兩個參數都丟失了。

經過在互聯網上搜索這麼多的搜索和替代解決方案後,我沒有發現它爲什麼會發生。所以,我替換了HttpRequestBuilder。

最後,爲了有一個完整的工作代碼,我使用了下一個,現在一切正常。

final String username = usernamefld.getText().toString().trim(); 
final String password = passwordfld.getText().toString().trim(); 

Map<String, String> parameters = new HashMap<String, String>(); 
parameters.put("username", username); 
parameters.put("password", password); 
final HttpRequest httpRequest = new HttpRequest(Net.HttpMethods.POST); 
httpRequest.setHeader("Content-Type", "application/x-www-form-urlencoded"); 
httpRequest.setHeader("Upgrade", "HTTP/1.1, HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11"); 
httpRequest.setUrl(LOGIN_URL); 
httpRequest.setContent(HttpParametersUtils.convertHttpParameters(parameters)); 
httpRequest.setTimeOut(6000); 

再次感謝您的幫助。