当一个应用程序试图在它的主线程执行网络操作的时候就会抛出这个异常!
错误是
android.os.NetworkOnMainThreadException
所以放在线程中运行就可以了!不要在UI中运行!
class RetreiveFeedTask extends AsyncTask<String, Void, RSSFeed> { private Exception exception; protected RSSFeed doInBackground(String... urls) { try { URL url= new URL(urls[0]); SAXParserFactory factory =SAXParserFactory.newInstance(); SAXParser parser=factory.newSAXParser(); XMLReader xmlreader=parser.getXMLReader(); RssHandler theRSSHandler=new RssHandler(); xmlreader.setContentHandler(theRSSHandler); InputSource is=new InputSource(url.openStream()); xmlreader.parse(is); return theRSSHandler.getFeed(); } catch (Exception e) { this.exception = e; return null; } } protected void onPostExecute(RSSFeed feed) { } } new RetreiveFeedTask().execute(urlToRssFeed);