CODEWITHSUNDEEP
javaandroidxmlparsingsax
Todor Kostov
Todor Kostov

Reputation: 31

Extracting text from xml in java

I am trying to create a rss reader for android. So I am connecting to a rss ulr and get some XML information. This is the link - http://www.bulgarianhistory.org/feed/ If you open it to see the source, you will notice that there is one tag content:encoded. How can I get the information within this tag? My code just skips it! I am using SAX. And this is my Parser class:

public class RSSParser extends DefaultHandler {
    private final static String TAG_ITEM = "item";
    private final static String[] xmltags = { "title", "link", "pubDate", "description", "content" };

    private RSSItem currentitem = null;
    private ArrayList<RSSItem> itemarray = null;
    private int currentindex = -1;
    private boolean isParsing = false;
    private StringBuilder builder = new StringBuilder();

    public RSSParser(ArrayList<RSSItem> itemarray) {
        super();

        this.itemarray = itemarray;
    }

    @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            super.characters(ch, start, length);

            if(isParsing && -1 != currentindex && null != builder)
            {
                builder.append(ch,start,length);
            }
        }

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

            if(localName.equalsIgnoreCase(TAG_ITEM))
            {
                currentitem = new RSSItem();
                currentindex = -1;
                isParsing = true;

                itemarray.add(currentitem);
            }
            else
            {
                currentindex = itemIndexFromString(localName);

                builder = null;

                if(-1 != currentindex)
                    builder = new StringBuilder();
            }
        }

    @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            super.endElement(uri, localName, qName);

            if(localName.equalsIgnoreCase(TAG_ITEM))
            {
                isParsing = false;
            }
            else if(currentindex != -1)
            {
                if(isParsing)
                {
                    switch(currentindex)
                    {
                        case 0: currentitem.title = builder.toString();                 break;
                        case 1: currentitem.link = builder.toString();                  break;
                        case 2: currentitem.date = builder.toString();                  break;
                        case 3: currentitem.description= builder.toString();            break;
                        case 4: currentitem.content = builder.toString();               break;
                    }
                }
            }
        }

    private int itemIndexFromString(String tagname){
        int itemindex = -1;

        for(int index= 0; index<xmltags.length; ++index)
        {
            if(tagname.equalsIgnoreCase(xmltags[index]))
            {
                itemindex = index;

                break;
            }
        }

        return itemindex;
    }
}

Upvotes: 3

Views: 357

Answers (2)

Satheesh Cheveri
Satheesh Cheveri

Reputation: 3679

Looks like tag with namespace is ignored by your if . Just try printing tag name here

 private int itemIndexFromString(String tagname){
        int itemindex = -1;

        for(int index= 0; index<xmltags.length; ++index)
        {
            **PRINT (tagname)**
            if(tagname.equalsIgnoreCase(xmltags[index]))
            {

if it prints as content:encoded, you would need to modify xmltags [] to inlcude content:encoded instead of content

Upvotes: 1

Ovidiu Latcu
Ovidiu Latcu

Reputation: 72311

I would really recommend not to use Sax on Android, since as far as I remember it's performance is really slow on Android. You should be using XmlPullParser which comes with Android, so no need to add any external jars and also you will have significant performance improvements. I have just tested and XmlPullParser would parse the <content:encoded> tag as any other tags, so it will work.

Upvotes: 1

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