【Android进阶学习】Http编程之HttpConnection

HttpURLConnection是继承于URLConnection类，二者都是抽象类。其对象主要通过URL的openConnection方法获得的。     

下面是具体的代码：

package com.llingdududu.url;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.Activity;
import android.os.Bundle;

public class URLConnectionActivity extends Activity {
    String urlStr = "http://developer.android.com/";
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        try {
            //实例化URL
            URL url = new URL(urlStr);
            //使用HttpURLConnection打开连接
            HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
            //得到输入流对象
            InputStreamReader in = new InputStreamReader(httpConnection.getInputStream());
            BufferedReader bufReader = new BufferedReader(in);
            String lineStr = "";
            String resultStr = "";
            while ((lineStr = bufReader.readLine())!=null) {
                resultStr += lineStr + "\n";
            }

            System.out.println(resultStr);
            //关闭输入流
            in.close();
            //关闭连接
            httpConnection.disconnect();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}