建立網路連線，
HttpURLConnection conn = (HttpURLConnection) imgUrl.openConnection()
獲取getHeaderFields：
Map<　String, List> map = conn.getHeaderFields();
再get(“Set-Cookie”)：
List cookies = map.get(“Set-Cookie”);
打印出的buf就是．下文中的應用還包含生成Bitmap.

private Bitmap getImageBitmap(String url) {
    URL imgUrl = null;
    Bitmap bitmap = null;
    try {
        imgUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) imgUrl.openConnection();
        conn.setDoInput(true);
        conn.connect();

        Map<String, List<String>> map = conn.getHeaderFields();
        List<String> cookies = map.get("Set-Cookie");
        StringBuffer buf = new StringBuffer();
        for (String cookie : cookies) {
            buf.append(cookie);
        }
        System.out.println("segg6575---buf = " + buf.toString());
        InputStream is = conn.getInputStream();
        bitmap = BitmapFactory.decodeStream(is);
        is.close();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return bitmap;
}