Java 使用wamp服务器、phpmyadmin、eclipse和json进行Android登录和注册

我试图创建一个登录界面遵循本教程：-第1部分至第6部分

当我在Android emulator上运行应用程序时，它返回toast消息“Login Unsuccessful”（下面Main.java文件中声明的异常）

main.java文件连接到我保存在目录wamp/www/index.php中的php文件-index.php，然后该文件与存储在wamp服务器（在我的本地机器上）上的“mobiledb”通信

已经在数据库中创建了一个用户，我尝试通过模拟器登录，该模拟器将验证登录详细信息，并给出toast消息“Success！”

如果有人能在这个问题上提供任何帮助，我们将不胜感激。谢谢

Main.java

package com.kibriaali.logintutorial;

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.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Main extends Activity implements OnClickListener{
    EditText etUser, etPass;
    Button bLogin;

    //Create string variables that will have the input assigned to them
    String username, password;

    //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;



    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        initialise();
    }

    private void initialise() {
        // TODO Auto-generated method stub
        etUser = (EditText) findViewById(R.id.etUser);
        etPass = (EditText) findViewById(R.id.etPass);
        bLogin = (Button) findViewById(R.id.bSubmit);
        //Now to set an onClickListener
        bLogin.setOnClickListener(this);
    }

    public void onClick(View v) {
        // This is where we will be working now

        //Create new default HTTPClient
        httpclient = new DefaultHttpClient();

        //Create new HTTP POST with URL to php file as parameter
        httppost = new HttpPost("http://127.0.0.1/wamp/www/index.php"); //92.4.131.132 //127.0.0.1 //10.0.2.2

        //Assign input text to strings
        username = etUser.getText().toString();
        password = etPass.getText().toString();



        //Next block of code needs to be surrounded by try/catch block for it to work
        try {
            //Create new Array List
            nameValuePairs = new ArrayList<NameValuePair>(2);

            //place them in an array list
            nameValuePairs.add(new BasicNameValuePair("user", "username"));
            nameValuePairs.add(new BasicNameValuePair("pass", "password"));

            //Add array list to http post
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            //assign executed form container to response
            response = httpclient.execute(httppost); //response from the PHP file

            //check status code, need to check status code 200
            if(response.getStatusLine().getStatusCode()== 200){

                //assign response entity to http entity
                entity = response.getEntity();

                //check if entity is not null
                if(entity != null){


                    //Create new input stream with received data assigned
                    InputStream instream = entity.getContent();

                    //Create new JSON Object. assign converted data as parameter.
                    JSONObject jsonResponse = new JSONObject(convertStreamToString(instream));

                    //assign json responses to local strings
                    String retUser = jsonResponse.getString("user");//mySQL table field
                    String retPass = jsonResponse.getString("pass");

                    //Validate login
                    if(username.equals(retUser)&& password.equals(retPass)){ //Check whether 'retUser' and 'retPass' matches username/password 

                        //Create a new shared preference by getting the preference
                        //Give the shared preference any name you like.
                        SharedPreferences sp = getSharedPreferences("logindetails", 0);

                        //Edit the Shared Preference
                        SharedPreferences.Editor spedit = sp.edit();

                        //Put the login details as strings
                        spedit.putString("user", username);
                        spedit.putString("pass", password);//May not need to store password

                        //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
            //Change message to something more friendly
            Toast.makeText(getBaseContext(), "Login Unsuccessful.", Toast.LENGTH_SHORT).show();
        }






    }//END onClick()

    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()

}

package com.kibriaali.logintutorial；
导入java.io.BufferedReader；
导入java.io.IOException；
导入java.io.InputStream；
导入java.io.InputStreamReader；
导入java.util.ArrayList；
导入org.apache.http.HttpEntity；
导入org.apache.http.HttpResponse；
导入org.apache.http.NameValuePair；
导入org.apache.http.client.HttpClient；
导入org.apache.http.client.entity.UrlEncodedFormEntity；
导入org.apache.http.client.methods.HttpPost；
导入org.apache.http.impl.client.DefaultHttpClient；
导入org.apache.http.message.BasicNameValuePair；
导入org.json.JSONObject；
导入android.app.Activity；
导入android.content.SharedReferences；
导入android.os.Bundle；
导入android.view.view；
导入android.view.view.OnClickListener；
导入android.widget.Button；
导入android.widget.EditText；
导入android.widget.Toast；
公共类主扩展活动实现OnClickListener{
编辑文本etUser，etPass；
按钮博客；
//创建将输入分配给它们的字符串变量
字符串用户名、密码；
//创建一个HTTPClient作为表单容器
HttpClient-HttpClient；
//使用HTTP POST方法
HttpPost-HttpPost；
//为要发送的输入数据创建数组列表
ArrayList名称值对；
//创建HTTP响应和HTTP实体
HttpResponse响应；
http实体；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.main）；
初始化（）；
}
私有无效初始化（）{
//TODO自动生成的方法存根
etUser=（EditText）findViewById（R.id.etUser）；
etPass=（EditText）findViewById（R.id.etPass）；
bLogin=（按钮）findviewbyd（R.id.bSubmit）；
//现在设置onclick侦听器
setOnClickListener（this）；
}
公共void onClick（视图v）{
//这就是我们现在工作的地方
//创建新的默认HTTPClient
httpclient=新的DefaultHttpClient（）；
//以php文件的URL作为参数创建新的HTTP POST
httppost=新的httppost（“http://127.0.0.1/wamp/www/index.php"); //92.4.131.132 //127.0.0.1 //10.0.2.2
//将输入文本指定给字符串
username=etUser.getText（）.toString（）；
password=etPass.getText（）.toString（）；
//下一个代码块需要被try/catch块包围，才能正常工作
试一试{
//创建新数组列表
nameValuePairs=新的ArrayList（2）；
//将它们放入数组列表中
添加（新的BasicNameValuePair（“用户”、“用户名”）；
添加（新的BasicNameValuePair（“pass”、“password”）；
//将数组列表添加到http post
setEntity（新的UrlEncodedFormEntity（nameValuePairs））；
//将已执行的表单容器分配给响应
response=httpclient.execute（httppost）；//来自PHP文件的响应
//检查状态代码，需要检查状态代码200
if（response.getStatusLine（）.getStatusCode（）==200）{
//将响应实体分配给http实体
entity=response.getEntity（）；
//检查实体是否不为空
如果（实体！=null）{
//使用已分配的接收数据创建新的输入流
InputStream instream=entity.getContent（）；
//创建新的JSON对象。将转换后的数据指定为参数。
JSONObject jsonResponse=新的JSONObject（convertStreamToString（instream））；
//将json响应分配给本地字符串
String retUser=jsonResponse.getString（“用户”）；//mySQL表字段
String retPass=jsonResponse.getString（“pass”）；
//验证登录
如果（username.equals（retUser）和&password.equals（retPass））{//检查“retUser”和“retPass”是否与用户名/密码匹配
//通过获取首选项来创建新的共享首选项
//为共享首选项指定任何您喜欢的名称。
SharedReferences sp=GetSharedReferences（“登录详细信息”，0）；
//编辑共享首选项
SharedReferences.Editor spedit=sp.edit（）；
//将登录详细信息设置为字符串
spedit.putString（“用户”，用户名）；
spedit.putString（“pass”，password）；//可能不需要存储密码
//关闭编辑器
提交（）；
//显示祝酒词，表示登录成功
Toast.makeText（getBaseContext（），“SUCCESS！”，Toast.LENGTH\u SHORT.show（）；
}否则{
//展示一个祝酒词，说它失败了。
Toast.makeText（getBaseContext（），“无效的登录详细信息”，Toast.LENGTH_SHORT.show（）；
}
}
}
}捕获（例外e）{
e、 printStackTrace（）；
//有连接时显示toast
<?php
//turn off error reporting
error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);

//Create fields for the database
//server, username, password, database

$dbhost = "localhost"; //92.4.131.132 //127.0.0.1 //10.0.2.2
$dbuser = "root";
$dbpass = "";
$dbdb = "mobiledb";

//connect to mySQL
$connect = mysql_connect($dbhost, $dbuser, $dbpass) or die("connection error");

//Select the database
mysql_select_db($dbdb)or die("database selection error");

//Retrieve the login details via POST
$username = $_POST['username'];
$password = $_POST['password'];

//Query the table android login
$query = mysql_query("SELECT * FROM androidlogin WHERE user='$username' AND pass='$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();


}

?>