Analisi feed XML morire con "Element è già utilizzata"

Question

Sto cercando di analizzare un feed XML usando SimpleXML in Android: http://backend.deviantart.com/rss.xml?type=deviation&q=by%3Aspyed+sort%3Atime+meta%3Aall

campione qui:

<?xml version="1.0" encoding="UTF-8"?> 
<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:creativeCommons="http://backend.userland.com/creativeCommonsRssModule" xmlns:media="http://search.yahoo.com/mrss/" version="2.0"> 
    <channel> 
     <title>DeviantArt: spyed's</title> 
     <link>http://www.deviantart.com/?order=5&amp;q=by%3Aspyed</link> 
     <description>DeviantArt RSS for sort:time by:spyed</description> 
     <language>en-us</language> 
     <copyright>Copyright 2015, DeviantArt.com</copyright> 
     <pubDate>Thu, 20 Aug 2015 07:45:31 PDT</pubDate> 
     <generator>DeviantArt.com</generator> 
     <docs>http://blogs.law.harvard.edu/tech/rss</docs> 
     <atom:icon>http://st.deviantart.net/minish/touch-icons/android-192.png</atom:icon> 
     <atom:link type="application/rss+xml" rel="self" href="http://backend.deviantart.com/rss.xml?q=sort%3Atime+by%3Aspyed&amp;type=deviation" /> 
     <atom:link rel="next" href="http://backend.deviantart.com/rss.xml?q=sort%3Atime+by%3Aspyed&amp;type=deviation&amp;offset=60" /> 
     <item> 
      <title>Happy 15th Birthday!</title> 
      <link>http://spyed.deviantart.com/journal/Happy-15th-Birthday-552416478</link> 
      <guid isPermaLink="true">http://spyed.deviantart.com/journal/Happy-15th-Birthday-552416478</guid> 
      <pubDate>Sun, 09 Aug 2015 01:41:54 PDT</pubDate> 
      <media:title type="plain">Happy 15th Birthday!</media:title> 
      <media:keywords /> 
      <media:rating>nonadult</media:rating> 
      <media:category label="Personal">journals/personal</media:category> 
      <media:credit role="author" scheme="urn:ebu">spyed</media:credit> 
      <media:credit role="author" scheme="urn:ebu">http://a.deviantart.net/avatars/s/p/spyed.gif</media:credit> 
      <media:copyright url="http://spyed.deviantart.com">Copyright 2015 spyed</media:copyright> 
      <media:description type="html" /> 
      <media:content url="http://spyed.deviantart.com/journal/Happy-15th-Birthday-552416478" medium="document" /> 
      <media:text type="html">In April I wrote a post reflecting on my 15 years at DeviantArt, since the project began in April of 2000 and was launched to the public on August 7th. I went back and re-read what I wrote, and wow, speaking of audacious I'm pretty hardcore in this post. I write from my heart sometimes and then I hit post and that's that. So for our official 15th Birthday I wanted to re-share a link to that post:&lt;br /&gt;&lt;br /&gt;And then today, I wrote this reflection for you as a toast &amp;amp; thanks for all the llamas:&lt;br /&gt;&lt;br /&gt;Happy 15th Birthday DeviantArt! We are evolving, and soon we will be able to share exactly how you can be a part of our transformation, ensuring that the De</media:text> 
      <description /> 
     </item> 
     <item> 
      <title>The Floor is Open</title> 
      <link>http://spyed.deviantart.com/journal/The-Floor-is-Open-548845475</link> 
      <guid isPermaLink="true">http://spyed.deviantart.com/journal/The-Floor-is-Open-548845475</guid> 
      <pubDate>Sat, 25 Jul 2015 11:38:46 PDT</pubDate> 
      <media:title type="plain">The Floor is Open</media:title> 
      <media:keywords /> 
      <media:rating>nonadult</media:rating> 
      <media:category label="Personal">journals/personal</media:category> 
      <media:credit role="author" scheme="urn:ebu">spyed</media:credit> 
      <media:credit role="author" scheme="urn:ebu">http://a.deviantart.net/avatars/s/p/spyed.gif</media:credit> 
      <media:copyright url="http://spyed.deviantart.com">Copyright 2015 spyed</media:copyright> 
      <media:description type="html" /> 
      <media:content url="http://spyed.deviantart.com/journal/The-Floor-is-Open-548845475" medium="document" /> 
      <media:text type="html">Happy Saturday! I'm hanging out at home, so I thought I'd have an open conversation. Post anything, I'll reply. It's about 11:30am, I'll be in front of this thing for two hours before I go to my god daughters 7th birthday party! Yay!&lt;br /&gt;&lt;br /&gt;If you're wondering what we're up to, check out the DeviantArt Timeline (http://www.deviantart.com/timeline/) -- It might compel you to ask some questions. Or, if there's anything you've been wondering about, ask!&lt;br /&gt;&lt;br /&gt;Here's some food for thought to get you started about the overall state of DeviantArt:&lt;br /&gt;&lt;br /&gt;Our team focuses on two things that matter most to us, the first is our mission to Entertain, Inspire &amp;amp; Em</media:text> 
      <description /> 
     </item> 
     ... etc .... 

ma sto ottenendo il seguente errore:

08-13 15:55:38.529: W/System.err(1437): org.simpleframework.xml.core.PersistenceException: Element 'title' is already used with @org.simpleframework.xml.Element(data=false, name=title, required=false, type=void) on field 'title' public java.lang.String com.example.feedreader.SimpleRss$Channel$RssItem.title at line 1 

ho notato che c'è un tag title in due livelli diversi, ma non sono sicuro di come fare la distinzione nel codice.

Ecco quello che ho:

@Root(name = "rss", strict = false) 
public class SimpleRss implements FeedRoot { 

    @Root(name = "channel") 
    public static class Channel { 

     @Element(name = "title", required = false) 
     public String title = ""; 

     @Attribute(name = "href", required = false) 
     @ElementList(entry = "link", inline = true, required = false) 
     private List<String> links; 

     @Element(name = "description", required = false) 
     @Namespace(prefix = "") 
     public String description = ""; 

     @Element(name = "pubDate", required = false) 
     public String pubDate = ""; 

     @Element(name = "event_link", required = false) 
     public String event_link = ""; 

     @Root(name = "item") 
     public static class RssItem implements SimpleFeedItem { 

      public String parent = ""; 
      public String feedUrl = null; 
      public Date date = null; 

      @Element(name = "title", required = false) 
      public String title = ""; 

      @Element(name = "link", required = false) 
      public String link = ""; 

      @Element(name = "event_link", required = false) 
      public String event_link = ""; 

      @Element(name = "description", required = false) 
      public String description = ""; 

      @Element(name = "pubDate", required = false) 
      public String pubDate = ""; 

      @Path("enclosure") 
      @Attribute(name = "url", required = false) 
      public String enclosureUrl = ""; 

      @Path("enclosure") 
      @Attribute(name = "type", required = false) 
      public String enclosureType = ""; 

      @Override 
      public String getTitle() { 
       return title; 
      } 

      @Override 
      public String getDescription() { 
       return description; 
      } 

      @Override 
      public String getLink() { 
       return link; 
      } 

      @Override 
      public String getEventLink() { 
       return event_link; 
      } 

      @Override 
      public String getAdditional() { 
       return parent; 
      } 

      @Override 
      public String getPubDate() { 
       return pubDate; 
      } 

      @Override 
      public String getFeedUrl() { 
       return feedUrl; 
      } 

      @Override 
      public void setFeedUrl(String url) { 
       feedUrl = url; 
      } 

      @Override 
      public void setDate(Date date) { 
       this.date = date; 
      } 

      @Override 
      public Date getDate() { 
       return date; 
      } 

      @Override 
      public String getPictureUrl() { 
       if (DataUtils.isEmpty(enclosureType)) { 
        return null; 
       } else if (SimpleFeedItem.SupportedFeedImageTypes 
         .contains(enclosureType.toLowerCase(Locale.ENGLISH))) { 
        return enclosureUrl; 
       } else { 
        return null; 
       } 
      } 

     } 

     @ElementList(inline = true, required = false) 
     public List<RssItem> rssItems = J.newArrayList(); 

    } 

    @Element(name = "channel") 
    public Channel channel; 

    @Override 
    public List<SimpleFeedItem> getItems() { 
     List<SimpleFeedItem> items = J.newArrayList(); 

     if (channel != null && channel.rssItems != null) { 
      for (RssItem item : channel.rssItems) { 
       String title = channel.title; 
       if (title == null) { 
        title = ""; 
       } 
       item.parent = title.intern(); 
       items.add(item); 
      } 
     } 
     return items; 
    } 

    @Override 
    public String getTitle() { 
     if (channel == null) { 
      return ""; 
     } else { 
      return channel.title; 
     } 
    } 

} 

Ho provato commentando la

@Element(name = "title", required = false) 
public String title = ""; 

nella classe Channel ed ottengo lo stesso errore. Anche se lo rinominassi.

Se faccio lo stesso con quello nella classe RssItem, tuttavia, funzionerà ma non ottengo i titoli per gli articoli.

Grazie!

Answer 1

questo risolve il problema:

Inserisci questa:

@Element(name = "title", required = false) 

Sostituire con:

//inside the inner class RssItem 
@Path("title") 
@Text(required=false) 
public String title = ""; 

Questo dovrebbe essere ripetuto per qualsiasi altro campo che ottiene l'eccezione.

Answer 2

sembra che utilizzando

@Element(name = "title", required = false, inLine=true) 
public String title = ""; 

risolverà il vostro problema, come mostrato here.