CODEWITHSUNDEEP
javaandroidxmlparsingsax
Praxder
Praxder

Reputation: 2749

SAX XMLParser not working

I have followed multiple online tutorials on how to set up a SAX XML parser for the Android platform but none of them seem to work! Whats the problem? Heres my code:

Imports:

import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import android.app.Activity;
import android.util.Log;

This Code is in a method that I know gets called, but why doesent logcat show "TESTING"?

 try {
                URL XMLURL = new URL("https://gdata.youtube.com/feeds/api/videos?q=Crystallize+Lindsey+Stirling+Offical+Music+Video&orderby=relevance");
                SAXParserFactory SPF = SAXParserFactory.newInstance();
                SAXParser SP = SPF.newSAXParser();

                DefaultHandler mainHandler = new DefaultHandler(){

                    @Override
                    public void startElement(String uri, String localName,
                            String qName, Attributes attributes)
                            throws SAXException {

                        if(localName.equals("Link")){

                            String possibleURL = attributes.getValue("href");
                            Log.i("TEST","TESTING");
                        }

                    }
                };

                SP.parse(new InputSource(XMLURL.openStream()),mainHandler);
            } catch (Exception e) {
                e.printStackTrace();

            }

Thanks for any and all help!

Upvotes: 0

Views: 283

Answers (2)

Don Roby
Don Roby

Reputation: 41127

This is a namespace issue.

SAXParserFactory SPF = SAXParserFactory.newInstance();
SAXParser SP = SPF.newSAXParser();

is giving you a parser that doesn't properly handle namespaces.

If you change the startElement to check qName for the value "link", your code will work, but that's sort of a band-aid fix.

There are namespaces in this document, though this element is in the default namespace http://www.w3.org/2005/Atom specified for the document.

You should tell the parser factory to give you a namespace-aware parser:

SAXParserFactory SPF = SAXParserFactory.newInstance();
SPF.setNamespaceAware(true);
SAXParser SP = SPF.newSAXParser();

And then you'll get the expected result without changing the startElement method, except you do have to look for the right value, i.e., check for "link" instead of "Link".

Upvotes: 1

AC Arcana
AC Arcana

Reputation: 366

Check your logcat for a big chunk of yellow text. It may inform you about any errors that crashed the SAX parser.

Upvotes: 0

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