Android+PHP服務器+MySQL實現安卓端的登錄

時隔已久的一個任務，今天終於可以畫上一個句號了。心情是萬分的激動，雖然這份小成就來的有點遲但還是按捺不住心情的澎湃。下面我就先上幾張圖片來展示一下我的成績

android源代碼：

首先最重要的一件事是添加權限：

 

 <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,"登錄失敗", 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, "用戶和密碼不能為空", 0).show();
            return;
        }
        new Thread(){
            public void run(){
                try {  
                    //http://localhost/xampp/android/login.php
                    //區別1、url的路徑不同
                    String path = "http://192.168.1.101:80/xampp/login.php";
                    URL url = new  URL(path);
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    //區別2、請求方式post
                    conn.setRequestMethod("POST");
                    conn.setRequestProperty("User-Agent", "Mozilla/5.0(compatible;MSIE 9.0;Windows NT 6.1;Trident/5.0)");
                    //區別3、必須指定兩個請求的參數
                    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//請求的類型  表單數據
                    String data = "username="+qq+"&password="+psd+"&button=";
;
                    conn.setRequestProperty("Content-Length", data.length()+"");//數據的長度
                    //區別4、記得設置把數據寫給服務器
                    conn.setDoOutput(true);//設置向服務器寫數據
                    byte[] bytes = data.getBytes();
                    conn.getOutputStream().write(bytes);//把數據以流的方式寫給服務器
                    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 {
    /*
     * 把一個流里面的內容轉換成一個字符串
     * return 流的字符串 null 解析失敗
     * */
    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="登錄"/>

</LinearLayout>

PHP代碼：

<?php

if(isset($_POST['button'])){
    $username=$_POST['username'];//得到用戶輸入的用戶名
    $password=$_POST['password'];//密碼
     mysql_connect('127.0.0.1:3306','root','')or die(mysql_error());//連接數據庫
    mysql_select_db('mvc_study');//選擇數據庫
    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){//如果數據庫的行數為1則成功否則失敗
        echo $username;
        echo '已經成功登錄';
        }else{
         echo $username;
         echo '登錄失敗';
}
    }else{
    echo 'test!';
}
?>

MySQL:

先創建一個名字為“mvc_study”的數據庫。然后創建一個名字為“users”的表。

到此所有的工作已經完成了。可以進行測試了。測試的結果，去上面的一開始的兩張截圖。