android - AVD 解析速度非常慢

Question

我的代码获取 RSS 提要并解析它。代码工作正常，但在某些函数中速度很慢(请参阅代码中的时间)。有什么建议吗？

        URLConnection connection = feedUrl_.openConnection();
        InputStream inputStream = connection.getInputStream(); // 15 sec

        Reader reader = new InputStreamReader(inputStream, "UTF-8");
        InputSource inputSource = new InputSource(reader);
        doc = builder.parse(inputSource); // 60 sec

Answer 1

兄弟，试试用XMLPullParser解析数据吧，解析数据不会花太多时间，6-7秒。这是代码。试试这个:

onCreate()
{
try 
  {

  URL url = null;
  url = new URL("http://feeds.abcnews.com/abcnews/worldnewsheadlines");
  XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
  factory.setNamespaceAware(false);
  XmlPullParser xpp = factory.newPullParser();
  xpp.setInput(getInputStream(url), "UTF_8");
  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();
    }
}

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

我希望这个例子能帮到你。 :)