Android+PHP服务器+MySQL实现安卓端的登录

时隔已久的一个任务,今天终于可以画上一个句号了。心情是万分的激动,虽然这份小成就来的有点迟但还是按捺不住心情的澎湃。下面我就先上几张图片来展示一下我的成绩

android源代码:

首先最重要的一件事是添加权限:

 

 <uses-permission android:name="android.permission.INTERNET"/>

 

LoginActivity.java

package com.itcast.datalogin;



import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.content.Intent;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends Activity {
    protected static final int ERROR = 2;
    protected static final int SUCCESS = 1;
    private EditText et_qq;
    private EditText et_psd;
    private Handler handler = new Handler(){
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case SUCCESS:
                Toast.makeText(LoginActivity.this,(String)msg.obj, 1).show();
                break;

            case ERROR:
                Toast.makeText(LoginActivity.this,"登录失败", 1).show();
                break;

            }
        };
         };
      
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        et_qq = (EditText) findViewById(R.id.et_qq);
        et_psd = (EditText) findViewById(R.id.et_pwd);

   
    }
    public void login(View view){
        final String qq = et_qq.getText().toString();
        final String psd = et_psd.getText().toString();
      
        if(TextUtils.isEmpty(qq)||TextUtils.isEmpty(psd)){
            Toast.makeText(this, "用户和密码不能为空", 0).show();
            return;
        }
        new Thread(){
            public void run(){
                try {  
                    //http://localhost/xampp/android/login.php
                    //区别1、url的路径不同
                    String path = "http://192.168.1.101:80/xampp/login.php";
                    URL url = new  URL(path);
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    //区别2、请求方式post
                    conn.setRequestMethod("POST");
                    conn.setRequestProperty("User-Agent", "Mozilla/5.0(compatible;MSIE 9.0;Windows NT 6.1;Trident/5.0)");
                    //区别3、必须指定两个请求的参数
                    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//请求的类型  表单数据
                    String data = "username="+qq+"&password="+psd+"&button=";
;
                    conn.setRequestProperty("Content-Length", data.length()+"");//数据的长度
                    //区别4、记得设置把数据写给服务器
                    conn.setDoOutput(true);//设置向服务器写数据
                    byte[] bytes = data.getBytes();
                    conn.getOutputStream().write(bytes);//把数据以流的方式写给服务器
                    int code = conn.getResponseCode();
                    System.out.println(code);
                            if(code == 200){
                                InputStream is = conn.getInputStream();
                                String  result = StreamTools.readStream(is);
                                Message mas= Message.obtain();
                                mas.what = SUCCESS;
                                mas.obj = result;
                                handler.sendMessage(mas);
                                
                }else{
                    Message mas = Message.obtain();
                    mas.what = ERROR;
                    handler.sendMessage(mas);
                    }
                }catch (IOException e) {
                    // TODO Auto-generated catch block
                    Message mas = Message.obtain();
                    mas.what = ERROR;
                    handler.sendMessage(mas);
                }
            }
        }.start();

    }
}  

StreamTools.java

package com.itcast.datalogin;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class StreamTools {
    /*
     * 把一个流里面的内容转换成一个字符串
     * return 流的字符串 null 解析失败
     * */
    public static String readStream(InputStream is){
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len = -1;
            while ((len = is.read(buffer))!=-1) {
                baos.write(buffer,0,len);
            }
            baos.close();
            return new String(baos.toByteArray());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return "";
        }
    }
}
activity_login.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <EditText
        android:id="@+id/et_qq"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="144803094" />
    
    <EditText
        android:id="@+id/et_pwd"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:text="144803094" />
    <Button 
        android:onClick="login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="right"
        android:text="登录"/>

</LinearLayout>

PHP代码:

<?php

if(isset($_POST['button'])){
    $username=$_POST['username'];//得到用户输入的用户名
    $password=$_POST['password'];//密码
     mysql_connect('127.0.0.1:3306','root','')or die(mysql_error());//连接数据库
    mysql_select_db('mvc_study');//选择数据库
    mysql_query('set names utf8');
    
    $sql = "select * from users
     where username = '$username' and password='$password'";
     $rs=mysql_query($sql);
     if(mysql_num_rows($rs)==1){//如果数据库的行数为1则成功否则失败
        echo $username;
        echo '已经成功登录';
        }else{
         echo $username;
         echo '登录失败';
}
    }else{
    echo 'test!';
}
?>

MySQL:

先创建一个名字为“mvc_study”的数据库。然后创建一个名字为“users”的表。

到此所有的工作已经完成了。可以进行测试了。测试的结果,去上面的一开始的两张截图。

 

posted on 2016-07-26 22:55  kang_ya_ping  阅读(11322)  评论(1编辑  收藏  举报

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