[Android] Get source code of html from a web page

 

當想獲得某個網站上的網頁資訊時，除非該網站有提供相對應的API外，最直

接的方法就是 擷取他HTML的原始碼，透過HTML原始碼來獲取我們想截取的資

訊。 而以下的Function就是用 來獲取某個網頁的HTML原始碼。

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;


private String GetHTML(String URLString)
{
    try
    {
        HttpURLConnection urlConnection = null;
        URL url = new URL(URLString);
        //URLString為網址
        //假設想透過Proxy Server來連接到網址時可透過
        //URL url = new URL("http",String proxyip,int proxyport, URLString)
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);

        urlConnection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");
        urlConnection.setRequestProperty("Content-type", "text/html; charset= big5");

        urlConnection.connect();
        InputStream htmlbody = urlConnection.getInputStream();

        // ===============
        if (htmlbody != null)
        {
            int leng = 0;
            byte[] Data = new byte[100];
            byte[] totalData = new byte[0];
            int totalLeg = 0;

            do
            {
                leng = htmlbody.read(Data);
                if (leng > 0)
                {
                    totalLeg += leng;
                    byte[] temp = new byte[totalLeg];
                    System.arraycopy(totalData, 0, temp, 0, totalData.length);
                    System.arraycopy(Data, 0, temp, totalData.length, leng);
                    totalData = temp;
                }
            }
            while (leng > 0);

            return new String(totalData, "UTF-8"); //回傳HTML原始碼
        }
        else
        {
            return "Undefined";
        }
    }
    catch (MalformedURLException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return "Undefined";
    }
    catch (IOException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return "Undefined";
    }
}

以下為自己練習寫的Android，透過上面的方法獲取Proxy Server List，並且列出來