[android] 与PHP的session进行交互demo

package com.tsh.test;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    public Button loginBtn;
    public TextView loginUserName;
    public TextView loginPassword;
    public static String API="http://mail.sina.net/test.php";
    public LoginHandler loginHandler;
    public String sessionIdString;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取View对象
        loginBtn=(Button) findViewById(R.id.loginBtn);
        loginUserName=(TextView) findViewById(R.id.loginUsername);
        loginPassword=(TextView) findViewById(R.id.loginPassword);
        //给View对象设置点击事件
        loginBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                //开启新线程
                Thread loginThread=new Thread(new LoginRunable());
                loginThread.start();
            }
        });
        loginHandler=new LoginHandler();
    }
    //实现Runable接口,开启新线程
    class LoginRunable implements Runnable{
        @Override
        public void run() {
            try {
                URL url=new URL(API);
                HttpURLConnection http=(HttpURLConnection) url.openConnection();
                http.setRequestMethod("POST");
                http.setDoInput(true);
                http.setDoOutput(true);
                
                OutputStream ops=http.getOutputStream();
                PrintWriter pw=new PrintWriter(ops);
                String username=loginUserName.getText().toString();
                String password=loginPassword.getText().toString();
                pw.write("email="+username+"&psw="+password+"&loginfrom=app&output=json");
                pw.flush();
                
                String responseCookie = http.getHeaderField("Set-Cookie");
                if (responseCookie != null) {
                   sessionIdString = responseCookie.substring(0, responseCookie.indexOf(";"));
                }
                
                InputStream ins=http.getInputStream();
                byte[] buffer = new byte[1024];
                int length=0;
                StringBuilder sb=new StringBuilder();
                while((length=ins.read(buffer))!=-1){
                    sb.append(new String(buffer,0,length));
                }
                
                Message msg=new Message();
                msg.what=1;
                msg.obj=sb.toString();
                loginHandler.sendMessage(msg);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
        }
    }
    //传递消息的handle
    class LoginHandler extends Handler{
        @Override
        public void handleMessage(Message msg) {
            String loginResponse=(String) msg.obj;
            System.out.println(loginResponse);
            Toast.makeText(MainActivity.this, loginResponse, 10).show();
            Intent intent=new Intent(MainActivity.this, MailIndexActivity.class);
            intent.putExtra("PHPSESSIONID",sessionIdString);  
            startActivity(intent);
        }
    }
}

package com.tsh.test;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.Toast;

public class MailIndexActivity extends Activity {
    public static String API="http://mail.sina.net/test.php";
    public Handler sessionHandler;
    public String sessionIdString;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        Intent intent = getIntent();  
        sessionIdString= intent.getStringExtra("PHPSESSIONID"); 
        
        setContentView(R.layout.mail_index);
        sessionHandler=new SessionHandler();
        Thread sessionThread=new Thread(new SessionRunable());
        sessionThread.start();
        
        
    }
    class SessionRunable implements Runnable{

        @Override
        public void run() {
            URL url;
            try {
                url = new URL(API);
                HttpURLConnection http=(HttpURLConnection) url.openConnection();
                http.setRequestProperty("Cookie", sessionIdString);
                InputStream ins=http.getInputStream();
                byte[] buffer = new byte[1024];
                int length=0;
                StringBuilder sb=new StringBuilder();
                while((length=ins.read(buffer))!=-1){
                    sb.append(new String(buffer,0,length));
                }
                
                Message msg=new Message();
                msg.what=1;
                msg.obj=sb.toString();
                sessionHandler.sendMessage(msg);
            } catch (Exception e) {
                e.printStackTrace();
            }
            
        }
    }
    class SessionHandler extends Handler{
        @Override
        public void handleMessage(Message msg) {
            String str=(String) msg.obj;
            System.out.println("222");
            System.out.println(str);
            Toast.makeText(MailIndexActivity.this, str, 10).show();
        }
    }
}

<?php
session_start();
if(empty($_SESSION)){
   echo "设置session";
   $_SESSION['name']=1; 
   echo session_id();
}else{
   echo "获取session";
   print_r($_SESSION); 
}