我正在尝试将 android 应用程序连接到 mysql 数据库。数据库“tardy_system”在 wamp 服务器提供的 phpmyadmin 中运行。我们有一个位于 C:/Wamp/www/Latepass 的 php 文件“login.php”作为我们的 API 后端。它的主要目标是连接到数据库并运行查询以用作解析的 JSON 数据。我们在 android 环境中的 java 代码应该连接到 index.php 代码。我们无法将 java 代码连接到 php api 后端。java代码指定查看http://192.168.0.102:3306/Latepass/login.php为文件。这个局域网地址是 wamp 服务器和数据库的当前内部地址。它目前是动态的，但我们最终会将其更改为静态 ip。在我们保存并导出android apk并运行它后，UPON“Student Login”按钮点击java代码启动，但是
连接总是失败。
php 代码可以工作，并且可以从局域网上的任何计算机访问。我们运行了一个测试查询（一切都以 FOR DEBUGGINGONLY 开头），并且能够通过 2 个浏览器（Chrome 和 Firefox）从 LAN 上的任何地方读取它。
所以 WAMP 服务器正在工作 - 因为我们可以通过网络连接到 php 文件。PHP 文件正在运行——因为它确实在浏览器中执行了一个测试查询。
问题：我认为有些东西阻止了 java 代码和 php 代码之间的连接。我们已尝试禁用所有防火墙（路由器中的硬件和 Windows 中的软件。） JSON 连接使用端口 3306。似乎没有任何过滤该端口的东西。
我的 php 代码 - Latepass/login.php
<?php
//turn off error reporting
error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);
//connect to mySQL
$connect = mysql_connect("localhost", "root", "") or die(mysql_error("connection error 2"));
//Select the database
mysql_select_db("tardy_system")or die("database selection error");
//Retrieve the login details via POST
$username = $_POST['username'];
$password = $_POST['password'];
//Query the table android login
$query = mysql_query("SELECT * FROM students WHERE username='$username' AND password='$password'");
//check if there any results returned
$num = mysql_num_rows($query);
//If a record was found matching the details entered in the query
if($num == 1){
//Create a while loop that places the returned data into an array
while($list=mysql_fetch_assoc($query)){
//Store the returned data into a variable
$output = $list;
//encode the returned data in JSON format
echo json_encode($output);
}
//close the connection
mysql_close();
}
?>
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package com.android.upgrayeddapps.latepass;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class StudentLoginActivity extends Activity implements OnClickListener{
EditText etUsername;
EditText etPassword;
Button btnLogin;
//Create string variables that will have the input assigned to them
String strUsername;
String strPassword;
//Create a HTTPClient as the form container
HttpClient httpclient;
//Use HTTP POST method
HttpPost httppost;
//Create an array list for the input data to be sent
ArrayList<NameValuePair> nameValuePairs;
//Create a HTTP Response and HTTP Entity
HttpResponse response;
HttpEntity entity;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.studentlogin);
initialise();
}
private void initialise()
{
etUsername = (EditText) findViewById(R.id.txtbxStudentUsername);
etPassword = (EditText) findViewById(R.id.txtbxStudentLunchID);
btnLogin = (Button) findViewById(R.id.btnLoginStudent);
//Set onClickListener
btnLogin.setOnClickListener(this);
}
public void onClick(View v) {
//Create new default HTTPClient
httpclient = new DefaultHttpClient();
//Crate new HTTP POST with URL to php file as parameter
httppost = new HttpPost("http://192.168.0.102:3306/Latepass/login.php");
//Assign input text to strings
strUsername = etUsername.getText().toString();
strPassword = etPassword.getText().toString();
try{
//Create an Array List
nameValuePairs = new ArrayList<NameValuePair>();
//place them in an array list
nameValuePairs.add(new BasicNameValuePair("username", strUsername));
nameValuePairs.add(new BasicNameValuePair("password", strPassword));
//Add array list to http post
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
//assign executed for container to response
response = httpclient.execute(httppost);
//check status code, need to check status code 200
if(response.getStatusLine().getStatusCode()== 200){
//assign response.getEntity()l
//check if entity is not null
if(entity !=null){
//create new input stream with received data assigned
InputStream instream = entity.getContent();
//Create a JSON Object. Assign converted data as parameter
JSONObject jsonResponse = new JSONObject(convertStreamToString(instream));
//Assign JSON responses to local strings
String retUser = jsonResponse.getString("username");//mySQL table field
String retPass = jsonResponse.getString("password");//mySQL table field
//Validate login
if(strUsername.equals(retUser)&& strPassword.equals(retPass)){
//Create a new shared preference by getting the preference
SharedPreferences sp = getSharedPreferences("logindetails",0);
//Edit the shared Preferences
SharedPreferences.Editor spedit = sp.edit();
//Put the login details as strings
spedit.putString("username", strUsername);
spedit.putString("password", strPassword);
//Close the editor
spedit.commit();
//Display a Toast saying login was a success
Toast.makeText(getBaseContext(), "Success!",Toast.LENGTH_SHORT).show();
} else{
//Display a Toast saying it failed
Toast.makeText(getBaseContext(), "Invalid Login Details", Toast.LENGTH_SHORT).show();
}
}
}
} catch(Exception e){
e.printStackTrace();
//Display Toast when there is a connection error
Toast.makeText(getBaseContext(), "Connection Error Android",Toast.LENGTH_SHORT).show();
Log.e("YourTag", e.getMessage(), e);
}
}//End try/Catch
private static String convertStreamToString(InputStream is) {
/*
* To convert the InputStream to String we use the BufferedReader.readLine()
* method. We iterate until the BufferedReader return null which means
* there's no more data to read. Each line will appended to a StringBuilder
* and returned as String.
*/
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}//End ConvertStreamToString()
public void onGotoLatePassActiviy(View View)
{
Intent intent = new Intent(View.getContext(), LatePassActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
StudentLoginActivity.this.finish();
}
}
问题：我是否在 wamp 的配置中遗漏了一些不允许我的 java 代码访问 php 代码的内容？
目前我收到一些apache 错误，导致我尝试对其进行配置。
今天：在登录过程中运行wireshark。应用了 tcp 源和目标 = 3306 过滤器。得到这个传输
