使用Jsoup解析HTML页面

Jsoup是通过解析网站网页，结合标签，进而获取想要的内容。

通过继承Asynctask，通过Jsoup解析标签，将标签内容显示出来。

用法很简单。

<span style="font-size:18px;">class LoadHtml extends AsyncTask<String, String, String> {
		Document doc;
		URLImageParser imageParser = new URLImageParser();

		@Override
		protected String doInBackground(String... params) {  //后台执行的方法

			try {
				doc = Jsoup.connect(params[0]).get();
				Document content = Jsoup.parse(doc.toString());//返回一个Document对象，像JQuery那样解析
				Element elementContent = content.getElementById("vsb_content");
				if (elementContent == null) {
					elementContent = content.getElementById("vsb_content_2");
				}
				String temp = elementContent.html();

				author = content.getElementsByClass("authorstyle44518").text();
				time = content.getElementsByClass("timestyle44518").text();
				desc = android.text.Html.fromHtml(temp, imageParser, null);

			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return null;
		}

		@Override
		protected void onPostExecute(String result) {//<span style="color: rgb(51, 51, 51); font-family: arial, 'courier new', courier, 宋体, monospace, 'Microsoft YaHei'; font-size: 14px; line-height: 24px; white-space: pre-wrap;">onPostExecute方法是在doInBackground方法执行之后执行</span>
			// TODO Auto-generated method stub
			super.onPostExecute(result);
			loadContentBar.setVisibility(View.GONE);
			noticeAuthor.setText(author);//设置作者
			noticeTime.setText(time);//设置时间
			noticeContent.setText(desc);//设置描述内容
			noticeContent.setMovementMethod(LinkMovementMethod.getInstance());
		}

		@Override
		protected void onPreExecute() {
			// TODO Auto-generated method stub
			super.onPreExecute();
			loadContentBar.setVisibility(View.VISIBLE);
		}

	}</span>