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POAndroid SAX Parser for RDF feed
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  1. POAndroid SAX Parser for RDF feed
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    copied!<p>I'm completely stuck for a couple of days on trying to parse an RDF feed (newbie on Android parsers). In spite of using:</p> <pre><code>Element item = root.getChild("", ITEM); </code></pre> <p>since my items come from the root instead of CHANNEL, as appointed <a href="https://stackoverflow.com/questions/2966016/android-sax-with-rdf">here</a>. Anyway, I'm only retrieving 0 messages</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:syn="http://purl.org/rss/1.0/modules/syndication/" xmlns="http://purl.org/rss/1.0/"&gt; &lt;channel rdf:about="http://..."&gt; &lt;title&gt;Notícies&lt;/title&gt; &lt;link&gt;...&lt;/link&gt; &lt;description&gt;&lt;/description&gt; &lt;syn:updatePeriod&gt;daily&lt;/syn:updatePeriod&gt; &lt;syn:updateFrequency&gt;1&lt;/syn:updateFrequency&gt; &lt;syn:updateBase&gt;2009-08-25T16:01:24Z&lt;/syn:updateBase&gt; &lt;image rdf:resource="..."/&gt; &lt;items&gt; &lt;rdf:Seq&gt; &lt;rdf:li rdf:resource="..."/&gt; &lt;rdf:li rdf:resource="..."/&gt; &lt;/rdf:Seq&gt; &lt;/items&gt; &lt;/channel&gt; &lt;item rdf:about="..."&gt; &lt;title&gt;...&lt;/title&gt; &lt;link&gt;....&lt;/link&gt; &lt;description&gt;...&lt;/description&gt; &lt;dc:publisher&gt;No publisher&lt;/dc:publisher&gt; &lt;dc:creator&gt;administrador&lt;/dc:creator&gt; &lt;dc:rights&gt;&lt;/dc:rights&gt; &lt;dc:date&gt;2013-03-22T16:18:36Z&lt;/dc:date&gt; &lt;dc:type&gt;Noticia&lt;/dc:type&gt; &lt;/item&gt; &lt;item rdf:about="..."&gt; &lt;title&gt;...&lt;/title&gt; &lt;link&gt;....&lt;/link&gt; &lt;description&gt;...&lt;/description&gt; &lt;dc:publisher&gt;No publisher&lt;/dc:publisher&gt; &lt;dc:creator&gt;administrador&lt;/dc:creator&gt; &lt;dc:rights&gt;&lt;/dc:rights&gt; &lt;dc:date&gt;2013-03-22T16:18:36Z&lt;/dc:date&gt; &lt;dc:type&gt;Noticia&lt;/dc:type&gt; &lt;/item&gt; &lt;item rdf:about="..."&gt; &lt;title&gt;...&lt;/title&gt; &lt;link&gt;....&lt;/link&gt; &lt;description&gt;...&lt;/description&gt; &lt;dc:publisher&gt;No publisher&lt;/dc:publisher&gt; &lt;dc:creator&gt;administrador&lt;/dc:creator&gt; &lt;dc:rights&gt;&lt;/dc:rights&gt; &lt;dc:date&gt;2013-03-22T16:18:36Z&lt;/dc:date&gt; &lt;dc:type&gt;Noticia&lt;/dc:type&gt; &lt;/item&gt; ... &lt;/rdf:RDF&gt; </code></pre> <p>Using my SAX Parser as follows:</p> <pre><code>public class AndroidSaxFeedParser extends BaseFeedParser { static final String RDF_NAMESPACE = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"; static final String ATOM_NAMESPACE = "http://www.w3.org/2005/Atom"; static final String RSS_NAMESPACE = ""; static final String RSS = "RDF"; public AndroidSaxFeedParser(String feedUrl) { super(feedUrl); } public List&lt;Message&gt; parse() { final Message currentMessage = new Message(); //RootElement root = new RootElement(RSS); RootElement root = new RootElement(RDF_NAMESPACE, RSS); final List&lt;Message&gt; messages = new ArrayList&lt;Message&gt;(); //Element channel = root.getChild(CHANNEL); //Element channel = root.getChild(RDF_NAMESPACE, CHANNEL); Log.e("Valor Root", root.toString()); Element item = root.getChild("", ITEM); //Element item = channel.getChild(RDF_NAMESPACE,ITEM); item.setEndElementListener(new EndElementListener(){ public void end() { messages.add(currentMessage.copy()); } }); item.getChild(TITLE).setEndTextElementListener(new EndTextElementListener(){ public void end(String body) { currentMessage.setTitle(body); } }); item.getChild(LINK).setEndTextElementListener(new EndTextElementListener(){ public void end(String body) { currentMessage.setLink(body); } }); item.getChild(DESCRIPTION).setEndTextElementListener(new EndTextElementListener(){ public void end(String body) { currentMessage.setDescription(body); } }); item.getChild(PUB_DATE).setEndTextElementListener(new EndTextElementListener(){ public void end(String body) { currentMessage.setDate(body); } }); try { Xml.parse(this.getInputStream(), Xml.Encoding.UTF_8, root.getContentHandler()); } catch (Exception e) { throw new RuntimeException(e); } return messages; } } </code></pre> <p>I've tried</p> <blockquote> <p>Element item = root.getChild("RDF_NAMESPACE", ITEM); Element item = root.getChild("", ITEM); Element item = root.getChild(ITEM);</p> </blockquote> <p>But those 3 options return 0 messages. Any help would be really much appreciated. Many thanks in advance.</p>
 

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