networkonmainthread - How do I fix android.os.NetworkOnMainThreadException? -

i got error while running android project 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 = new inputsource(url.openstream()); xmlreader.parse(is); return thersshandler.getfeed(); 

and shows below error:

android.os.networkonmainthreadexception 

how can fix issue?

this exception thrown when application attempts perform networking operation on main thread. run code in asynctask:

class retrievefeedtask 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 = new inputsource(url.openstream());             xmlreader.parse(is);              return thersshandler.getfeed();         } catch (exception e) {             this.exception = e;              return null;         }     }      protected void onpostexecute(rssfeed feed) {         // todo: check this.exception         // todo: feed     } } 

how execute task:

in mainactivity.java file can add line within oncreate() method

new retrievefeedtask().execute(urltorssfeed); 

don't forget add androidmanifest.xml file:

<uses-permission android:name="android.permission.internet"/>