Jsoupでhtmlパース。img srcタグを抽出。

AsyncHttpRequest.java

    @Override
    protected String doInBackground(Uri.Builder... builder) {
        try {
            document = Jsoup.connect("http://ws-tcg.com/ws_today").get();
            return "成功";
        }catch(IOException e){
            return "失敗";
        }
    }

    // このメソッドは非同期処理の終わった後に呼び出されます
    @Override
    protected void onPostExecute(String result) {
        Elements img = document.select("div.center");
        urls = new ArrayList<String>();
        for(int i = 0;i < img.size();i++){
            Element e = img.get(i);
            String parse = e.toString().replaceAll("<div.+?>", "");
            parse = parse.replaceAll("</div>", "");
            parse = parse.replaceAll("<img src=\"", "");
            parse = parse.replaceAll("\" alt=\"\">", "");
            parse = parse.replaceAll(" ", "");
            parse = parse.replaceAll("\n", "");
            urls.add(parse);
       }
        ViewFlipper flipper = (ViewFlipper) mainActivity.findViewById(R.id.flipper);

        //URL数だけImageViewを作成してflipperに追加
        for(int i=0;i<urls.size();i++) {
            ImageView iv = new ImageView(mainActivity);
            Picasso.with(mainActivity).load(urls.get(i)).into(iv);
            flipper.addView(iv);
        }
    }