Android Open Source - radiogeek R S S Parser

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Back to project page radiogeek.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.farnabaz.android.radiogeek;
/*from w  w  w . j a v  a  2  s .co  m*/
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;

import javax.xml.parsers.ParserConfigurationException;
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.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import android.util.Log;

public class RSSParser extends DefaultHandler {

  private URL _url;

  private String _lastBuildTime;

  public RSSParser() {

  }

  public void setUrl(URL url) {
    this._url = url;
  }

  public void SetLastBuildDate(String lbt) {
    this._lastBuildTime = lbt;
  }

  public void parse() {
    SAXParserFactory spf = SAXParserFactory.newInstance();
    SAXParser sp;
    try {
      sp = spf.newSAXParser();
      XMLReader xr = sp.getXMLReader();
      xr.setContentHandler(this);
      xr.parse(new InputSource(_url.openConnection().getInputStream()));
    } catch (ParserConfigurationException e) {
      Log.e("RssParser", e.getMessage());
      items = null;
    } catch (SAXException e) {
      Log.e("RssParser", e.getMessage());
      items = null;
    } catch (IOException e) {
      Log.e("RssParser", e.getMessage());
      items = null;
    }
  }

  // booleans that check whether it's in a specific tag or not
  private boolean _isActive = true;

  // this holds the data
  private ArrayList<Item> items;

  private Item item;

  private String content;

  private String lastBuildDate;

  private void setUpdateTime(String lbt) {
    lastBuildDate = lbt;
    if (lastBuildDate.equals(_lastBuildTime)) {
      _isActive = false;
    }
  }

  /**
   * Returns the data object
   * 
   * @return
   */
  public ArrayList<Item> getRSS() {
    return items;
  }

  /**
   * This gets called when the xml document is first opened
   * 
   * @throws SAXException
   */
  @Override
  public void startDocument() throws SAXException {
    items = new ArrayList<Item>();
  }

  /**
   * Called when it's finished handling the document
   * 
   * @throws SAXException
   */
  @Override
  public void endDocument() throws SAXException {
  }

  /**
   * This gets called at the start of an element. Here we're also setting the
   * booleans to true if it's at that specific tag. (so we know where we are)
   * 
   * @param namespaceURI
   * @param localName
   * @param qName
   * @param atts
   * @throws SAXException
   */
  @Override
  public void startElement(String namespaceURI, String localName,
      String qName, Attributes atts) throws SAXException {
    if (_isActive) {
      if (localName.equals(""))
        localName = qName;
      if (localName.equals("item")) {
        item = new Item();
      } else if (localName.equals("enclosure") && item.mediaUrl == null) {
        item.mediaUrl = atts.getValue("url");
      }
      content = "";
    } else {
      throw new SAXException("Break");
    }
  }

  /**
   * Called at the end of the element. Setting the booleans to false, so we
   * know that we've just left that tag.
   * 
   * @param namespaceURI
   * @param localName
   * @param qName
   * @throws SAXException
   */
  @Override
  public void endElement(String namespaceURI, String localName, String qName)
      throws SAXException {
    if (_isActive) {
      if (localName.equals(""))
        localName = qName;
      if (localName.equals("item")) {
        items.add(item);
        Log.i("aa", item.mediaUrl);
      }
      if (localName.equals("lastBuildDate")) {
        setUpdateTime(content);
      }

      if (item == null)
        return;
      if (localName.equals("title")) {
        item.title = content;
      } else if (localName.equals("description")) {
        item.description = content;
      } else if (qName.equals("content:encoded")) {
        item.content = content;
      } else if (localName.equals("link")) {
        item.link = content;
      } else if (localName.equals("pubDate")) {
        item.setPubDate(content);
      }
    }
  }

  /**
   * Calling when we're within an element. Here we're checking to see if there
   * is any content in the tags that we're interested in and populating it in
   * the Config object.
   * 
   * @param ch
   * @param start
   * @param length
   */
  @Override
  public void characters(char ch[], int start, int length) {
    if (_isActive) {
      String chars = new String(ch, start, length);
      chars = chars.trim();
      content += chars;
    }
  }

  public String getLastBuildDate() {
    return lastBuildDate;
  }

  public boolean hasItem() {
    return items != null && items.size() > 0;
  }

  public void stop() {
    _isActive = false;
  }
}

Java Source Code List

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