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：
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
PHP代码：
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。