在 Android 上的可中止进程中获取网页。最灵敏的方式是什么？

发布于 2024-10-15 23:00:33 字数 1030 浏览 7 评论 0原文

我正在为 Android 编写一个应用程序，需要尽可能快地响应。该应用程序基本上从网站（HTML，而不是 XHTML）获取内容，并使用 XPATH 查询解析其中的一些信息。我希望用户能够点击取消并中止请求，返回到之前的活动。

现在我的代码看起来像这样（我使用 http://htmlcleaner.sourceforge.net/ 中的 htmlcleaner jar to convert html to xhtml)：

   //this is called from the doInBackground() method embedded in an ASyncTask
   HtmlCleaner cleaner = new HtmlCleaner();
   CleanerProperties props = cleaner.getProperties();
   props.setAllowHtmlInsideAttributes(true);
   props.setAllowMultiWordAttributes(true);
   props.setRecognizeUnicodeChars(true);
   props.setOmitComments(true);
   try {
        URL url = new URL("---my-url-goes-here---");
        URLConnection conn = url.openConnection();
        TagNode node = cleaner.clean(new InputStreamReader(conn.getInputStream()));
        return node;
   } catch (Exception e) {
       failed = true;
   }

我不确定我的代码中的下载是否实际上可以中止，更不用说我知道如何完成此操作。我的方法正确还是应该采取不同的方法？

原文

I am writing an application for Android that needs to respond as fast as possible. The app basically grabs content from a website (HTML, not XHTML) and parses some of its information using XPATH queries. I want the user to be able to hit cancel and abort the request, returning to the previous activity.

Right now my code looks like this (I use the htmlcleaner jar from http://htmlcleaner.sourceforge.net/ to convert html to xhtml):

   //this is called from the doInBackground() method embedded in an ASyncTask
   HtmlCleaner cleaner = new HtmlCleaner();
   CleanerProperties props = cleaner.getProperties();
   props.setAllowHtmlInsideAttributes(true);
   props.setAllowMultiWordAttributes(true);
   props.setRecognizeUnicodeChars(true);
   props.setOmitComments(true);
   try {
        URL url = new URL("---my-url-goes-here---");
        URLConnection conn = url.openConnection();
        TagNode node = cleaner.clean(new InputStreamReader(conn.getInputStream()));
        return node;
   } catch (Exception e) {
       failed = true;
   }

I am not sure if the downloading in my code is actually abortable, let alone that I would know how to accomplish this. Am I on the right way or should I go for a different approach?

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