android - 我的 android 应用程序中的 Marque Rss 新闻提要

Question

我是 android 的新手。我正在创建一个应用程序，在该应用程序中我正在考虑在活动的底部放置一个“品牌 Rss 提要”。这可能吗？是否可以在同一个活动中放置两个以上的 RSS 提要？

Answer 1

对的，这是可能的..

这是从 URL 获取 RSS 提要并将其列在 android 的列表视图中的代码。

你需要先创建一个扩展ListActivity的类，然后把这段代码：

    // Initializing instance variables
    headlines = new ArrayList();
    links = new ArrayList();

    try {
        URL url = new URL("http://www.RSS-Feed-URL-HERE");

        XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
        factory.setNamespaceAware(false);
        XmlPullParser xpp = factory.newPullParser();

            // We will get the XML from an input stream
        xpp.setInput(getInputStream(url), "UTF_8");

            /* We will parse the XML content looking for the "<title>" tag which appears inside the "<item>" tag.
             * However, we should take in consideration that the rss feed name also is enclosed in a "<title>" tag.
             * As we know, every feed begins with these lines: "<channel><title>Feed_Name</title>...."
             * so we should skip the "<title>" tag which is a child of "<channel>" tag,
             * and take in consideration only "<title>" tag which is a child of "<item>"
             *
             * In order to achieve this, we will make use of a boolean variable.
             */
        boolean insideItem = false;

            // Returns the type of current event: START_TAG, END_TAG, etc..
        int eventType = xpp.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {
            if (eventType == XmlPullParser.START_TAG) {

                if (xpp.getName().equalsIgnoreCase("item")) {
                    insideItem = true;
                } else if (xpp.getName().equalsIgnoreCase("title")) {
                    if (insideItem)
                        headlines.add(xpp.nextText()); //extract the headline
                } else if (xpp.getName().equalsIgnoreCase("link")) {
                    if (insideItem)
                        links.add(xpp.nextText()); //extract the link of article
                }
            }else if(eventType==XmlPullParser.END_TAG && xpp.getName().equalsIgnoreCase("item")){
                insideItem=false;
            }

            eventType = xpp.next(); //move to next element
        }

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (XmlPullParserException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    // Binding data
    ArrayAdapter adapter = new ArrayAdapter(this,
            android.R.layout.simple_list_item_1, headlines);

    setListAdapter(adapter);


}
public InputStream getInputStream(URL url) {
       try {
           return url.openConnection().getInputStream();
       } catch (IOException e) {
           return null;
         }
    }

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
   Uri uri = Uri.parse((String) links.get(position));
   Intent intent = new Intent(Intent.ACTION_VIEW, uri);
   startActivity(intent);
}

& 你也可以让这个类扩展 Activity，并在 Activity 中手动放置两个列表视图，然后将这段代码处理为两个列表视图。