android How to parse atom feed?

Question

I am doing a task based on retrieving images from the picasa public albums. It's returning response in the atom feed format. Here is the response snippet im getting from the picasa.

<item>
<guid isPermaLink="false">https://picasaweb.google.com/data/entry/base/user/112104498664640193446/albumid/5791036084570489841/photoid/5791036081578935442?alt=rss&amp;hl=en_US</guid>
<pubDate>Sat, 22 Sep 2012 16:17:38 +0000</pubDate>
<atom:updated>2012-09-24T19:11:05.625Z</atom:updated>
<category domain="http://schemas.google.com/g/2005#kind">http://schemas.google.com/photos/2007#photo</category>
<title>SACHIN-TENDULKAR-WALLPAPER-51[1].jpg</title>
<description>&lt;table>&lt;tr>&lt;td style="padding: 0 5px">&lt;a href="https://picasaweb.google.com/112104498664640193446/Sachin?authkey=Gv1sRgCMG2v_GY6-iiOg#5791036081578935442">&lt;img style="border:1px solid #5C7FB9" src="https://lh3.googleusercontent.com/-IQEQp8boLEg/UF3kokv7hJI/AAAAAAAAACk/cr53Fr8fUC4/s288/SACHIN-TENDULKAR-WALLPAPER-51%25255B1%25255D.jpg" alt="SACHIN-TENDULKAR-WALLPAPER-51[1].jpg"/>&lt;/a>&lt;/td>&lt;td valign="top">&lt;font color="#6B6B6B">Date: &lt;/font>&lt;font color="#333333">Sep 22, 2012 4:17 PM&lt;/font>&lt;br/>&lt;font color=\"#6B6B6B\">Number of Comments on Photo:&lt;/font>&lt;font color=\"#333333\">0&lt;/font>&lt;br/>&lt;p>&lt;a href="https://picasaweb.google.com/112104498664640193446/Sachin?authkey=Gv1sRgCMG2v_GY6-iiOg#5791036081578935442">&lt;font color="#3964C2">View Photo&lt;/font>&lt;/a>&lt;/p>&lt;/td>&lt;/tr>&lt;/table></description>
<enclosure type="image/jpeg" url="https://lh3.googleusercontent.com/-IQEQp8boLEg/UF3kokv7hJI/AAAAAAAAACk/cr53Fr8fUC4/SACHIN-TENDULKAR-WALLPAPER-51%25255B1%25255D.jpg" length="0"/>
<link>https://picasaweb.google.com/112104498664640193446/Sachin?authkey=Gv1sRgCMG2v_GY6-iiOg#5791036081578935442</link>
<media:group>
<media:content url="https://lh3.googleusercontent.com/-IQEQp8boLEg/UF3kokv7hJI/AAAAAAAAACk/cr53Fr8fUC4/SACHIN-TENDULKAR-WALLPAPER-51%25255B1%25255D.jpg" height="384" width="512" type="image/jpeg" medium="image"/>
<media:credit>NW_MAY08</media:credit>
<media:description type="plain"/>
<media:keywords/>
<media:thumbnail url="https://lh3.googleusercontent.com/-IQEQp8boLEg/UF3kokv7hJI/AAAAAAAAACk/cr53Fr8fUC4/s72/SACHIN-TENDULKAR-WALLPAPER-51%25255B1%25255D.jpg" height="54" width="72"/>
<media:thumbnail url="https://lh3.googleusercontent.com/-IQEQp8boLEg/UF3kokv7hJI/AAAAAAAAACk/cr53Fr8fUC4/s144/SACHIN-TENDULKAR-WALLPAPER-51%25255B1%25255D.jpg" height="108" width="144"/>
<media:thumbnail url="https://lh3.googleusercontent.com/-IQEQp8boLEg/UF3kokv7hJI/AAAAAAAAACk/cr53Fr8fUC4/s288/SACHIN-TENDULKAR-WALLPAPER-51%25255B1%25255D.jpg" height="216" width="288"/>
<media:title type="plain">SACHIN-TENDULKAR-WALLPAPER-51[1].jpg</media:title>
</media:group>
</item>

EDIT:

public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        //Only consider elements from allowed third-party namespaces
        if (NAMESPACES.contains(uri)) {
            mSb = new StringBuffer();
            String value = localName.trim();
            //Log.i(TAG, "start");
            if (value.equalsIgnoreCase("rss") ||  value.equalsIgnoreCase("rdf")) {
                isType = true;
            } else if (value.equalsIgnoreCase("feed")) {
                isType = true;
                isFeed = true;
            } else if (value.equalsIgnoreCase("channel")) {
                isFeed = true;
            } else if (value.equalsIgnoreCase("item") || value.equalsIgnoreCase("entry")) {
                mItem = new Item();
                imageLoader = new ImageLoader(context);
                isItem = true;      
            } else if (value.equalsIgnoreCase("title"))
                isTitle = true;
            else if (value.equalsIgnoreCase("link")) {
                // Get attributes from link element for Atom format
                if (attributes != null) {
                    // Enclosure for Atom format
                    if (attributes.getValue("rel") != null && attributes.getValue("rel").equalsIgnoreCase("enclosure")) {
                        mEnclosure = new Enclosure();
                        mMimeAttribute = attributes.getValue("type");
                        isEnclosure = true;
                    }
                    mHrefAttribute = attributes.getValue("href");
                }
                isLink = true;
            } else if (value.equalsIgnoreCase("pubDate") || value.equalsIgnoreCase("published") || value.equalsIgnoreCase("date"))
                isPubdate = true;
            else if (value.equalsIgnoreCase("guid") || value.equalsIgnoreCase("id"))
                isGuid = true;
            else if (value.equalsIgnoreCase("description") || value.equalsIgnoreCase("summary"))
                isDescription = true;
            else if (value.equalsIgnoreCase("encoded") || value.equalsIgnoreCase("content"))
                isContent = true;
            else if (value.equalsIgnoreCase("source"))
                isSource = true;
            else if(value.equalsIgnoreCase("media:group")){
                isMedia = true;
                Log.i("media", "media group");
            }
            else if (value.equalsIgnoreCase("enclosure")) {
                // Enclosure for RSS format
                if (attributes != null) {
                    mEnclosure = new Enclosure();
                    mMimeAttribute = attributes.getValue("type");
                    mHrefAttribute = attributes.getValue("url");
                    if(mMimeAttribute.equalsIgnoreCase("image/jpeg")){
                        mItem.setImageUrl(mHrefAttribute);
                    }
                    Bitmap bmp = imageLoader.getBitmap(mHrefAttribute);
                    mItem.setBitmapImage(bmp);
                    isEnclosure = true;
                }
            }else if(value.equalsIgnoreCase("media:content")){
                if(attributes != null){
                    mMediaContent = new MediaContent();
                    mMimeAttribute_media = attributes.getValue("type");
                    mHrefAttribute_media = attributes.getValue("url");
                }
            }
        }
    }

EDIT 2

Here is the logcat when i use Log.i("RSSHandler", "localName="+localName+", qName="+qName);

10-02 14:04:51.799: I/RSSHandler(3090): localName=item, qName=item
10-02 14:04:51.799: I/RSSHandler(3090): localName=guid, qName=guid
10-02 14:04:51.799: I/RSSHandler(3090): localName=pubDate, qName=pubDate
10-02 14:04:51.799: I/RSSHandler(3090): localName=updated, qName=atom:updated
10-02 14:04:51.799: I/RSSHandler(3090): localName=category, qName=category
10-02 14:04:51.799: I/RSSHandler(3090): localName=title, qName=title
10-02 14:04:51.799: I/RSSHandler(3090): localName=description, qName=description
10-02 14:04:51.819: I/RSSHandler(3090): localName=enclosure, qName=enclosure
10-02 14:04:51.839: I/RSSHandler(3090): localName=link, qName=link
10-02 14:04:51.839: I/RSSHandler(3090): localName=group, qName=media:group
10-02 14:04:51.839: I/RSSHandler(3090): localName=content, qName=media:content
10-02 14:04:51.839: I/RSSHandler(3090): localName=credit, qName=media:credit
10-02 14:04:51.839: I/RSSHandler(3090): localName=description, qName=media:description
10-02 14:04:51.839: I/RSSHandler(3090): localName=keywords, qName=media:keywords
10-02 14:04:51.839: I/RSSHandler(3090): localName=thumbnail, qName=media:thumbnail
10-02 14:04:51.839: I/RSSHandler(3090): localName=thumbnail, qName=media:thumbnail
10-02 14:04:51.839: I/RSSHandler(3090): localName=thumbnail, qName=media:thumbnail
10-02 14:04:51.839: I/RSSHandler(3090): localName=title, qName=media:title

i tried modifying the code like this:

else if(qName.trim().equalsIgnoreCase("media:content") || value.equalsIgnoreCase("content")){

                if (attributes != null) {
                    mMediaContent  = new MediaContent();
                    mHrefAttribute_media = attributes.getValue("url");
                    Log.i("media url", mHrefAttribute_media);
                }
                isMedia = true;
                Log.i("media group", "media content");
            }

But this is not working.

I am unable to read medai:group from this response. I tried this but im unable to get the result. can any one please help me in doing this. Thank you.

How are you parsing it? Which parser did you use? In the tag `media:group`, `media` is the namespace and `group` is the element name. — Rajesh, Oct 01 '12 at 10:15
@Rajesh I am using SAX Parser. See this link. Im using the same process. http://www.javaworld.com/javaworld/jw-02-2012/120214-jtip-rss-for-android.html?page=2 — wolverine, Oct 01 '12 at 10:20
Please post the code snippet where you read the required element. — Rajesh, Oct 01 '12 at 10:26

score 0 · Answer 1 · edited May 23 '17 at 11:47

0

The media:group contains two parts media, which is the namespace prefix and group, which is the element name.

The localName and qName parameters of startElement are explained in XML SAX: Explain result in `qName` and `localName` in one example XML file

So you can modify your code as follows:

        else if(qName.equalsIgnoreCase("media:group")){
            isMedia = true;
            Log.i("media", "media group");
        }

edited May 23 '17 at 11:47

Community

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answered Oct 01 '12 at 13:43

Rajesh

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Please check if you are having any exception in the LogCat. Try to add debug log statements and see what is being passed as parameters to the startElement. – Rajesh Oct 01 '12 at 13:53
Please check [Reading and Writing Logs](http://developer.android.com/tools/debugging/debugging-log.html) to see how you can write and use log statements. I am sorry, but I cannot chat on gtalk. – Rajesh Oct 01 '12 at 14:01
It's ok.. But i am able to see the log if i put Log.i("", "") in the other parts of the snippet – wolverine Oct 01 '12 at 14:04
Try adding `Log.i("RSSHandler", "localName="+localName+", qName="+qName);` at the beginning of the startElement method. – Rajesh Oct 02 '12 at 05:12
What does `NAMESPACES` contain? You may also try adding `uri` to the log statement. – Rajesh Oct 02 '12 at 09:42
here is namespace: private static final Set NAMESPACES = new HashSet(Arrays.asList(new String[] {"","http://purl.org/rss/1.0/modules/content/", "http://www.w3.org/2005/Atom","http://purl.org/rss/1.0/","http://purl.org/dc/elements/1.1/"})); – wolverine Oct 02 '12 at 09:58
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/17444/discussion-between-rajesh-and-wolverine) – Rajesh Oct 02 '12 at 10:40

android How to parse atom feed?

1 Answers1