android SAX parser Example

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
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.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import android.app.ListActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class XmlparseDemoActivity extends ListActivity {


ArrayList<String> item = new ArrayList<String>();

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

try {
URL rssurl = new URL("http://feeds.bbci.co.uk/news/technology/rss.xml");
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
XMLReader reader = parser.getXMLReader();
RSSHelper rssHelper = new RSSHelper();
reader.setContentHandler(rssHelper);
System.setProperty("http.maxRedirects", "100");
InputSource input = new InputSource(rssurl.openStream());
String data=convertStreamToString(rssurl.openStream());


reader.parse(input);

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.rsslist, item);
setListAdapter(adapter);

} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXParseException sx) {

} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/* (non-Javadoc)
* @see android.app.ListActivity#onListItemClick(android.widget.ListView, android.view.View, int, long)
*/
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse( item.get(position))));
}


class RSSHelper extends DefaultHandler {

boolean isTitle = false;

/*
* (non-Javadoc)
*
* @see org.xml.sax.helpers.DefaultHandler#characters(char[], int, int)
*/
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
System.out.println("char: "+new String(ch,start,length));
if(isTitle){
item.add(new String(ch,start,length));
Log.i("DATA",new String(ch,start,length));
}

}

/*
* (non-Javadoc)
*
* @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String,
* java.lang.String, java.lang.String)
*/
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
isTitle=false;

}

/*
* (non-Javadoc)
*
* @see
* org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String,
* java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {

System.out.println("Elements: "+localName);
if(localName.equalsIgnoreCase("title")){
isTitle=true;
}else{
isTitle=false;
}

}

}

public String convertStreamToString(InputStream is) throws IOException {
        /*
         * To convert the InputStream to String we use the BufferedReader.readLine()
         * method. We iterate until the BufferedReader return null which means
         * there's no more data to read. Each line will appended to a StringBuilder
         * and returned as String.
         */
        if (is != null) {
            StringBuilder sb = new StringBuilder();
            String line;

            try {
                BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                while ((line = reader.readLine()) != null) {
                    sb.append(line).append("\n");
                }
            } finally {
                is.close();
            }
            return sb.toString();
        } else {      
            return "";
        }
    }

}