java - How to fix 'android.os.NetworkOnMainThreadException'?

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I got an error while running my
Android project for RssReader.

Code:

URL
            url = new URL(urlToRssFeed);
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();

And
it shows the below
error:

android.os.NetworkOnMainThreadException

How
can I fix this issue?

itemprop="text">

class="normal">Answer

This
exception is thrown when an application attempts to perform a networking operation on
its main thread. Run your code in href="http://developer.android.com/reference/android/os/AsyncTask.html"
rel="noreferrer">AsyncTask:

class
            RetrieveFeedTask extends AsyncTask {


            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;
 } finally {
 is.close();
 }

            }

 protected void onPostExecute(RSSFeed feed) {
 // TODO:
            check this.exception
 // TODO: do something with the feed

            }
}

How to
execute the task:

In
MainActivity.java file you can add this line within your
oncreate()
method

new
            RetrieveFeedTask().execute(urlToRssFeed);

Don't
forget to add this to AndroidManifest.xml
file:

            android:name="android.permission.INTERNET"/>