Android Open Source - rss-reader Rss Async Task

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.thecyanapps.rssreader;
/*w  w  w.j  a  va  2  s .c om*/
import java.io.IOException;
import java.io.InputStream;
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.SAXException;

import android.os.AsyncTask;

public class RssAsyncTask extends AsyncTask<Void, Void, Void> {

  private String url;
  private boolean isError = false;
  private String errorMsg;
  private ArrayList<RssObject> list;
  
  public RssAsyncTask(String url) {
    this.url = url;
    this.list = new ArrayList<RssObject>();
  }

  @Override
  protected void onPreExecute() {
  }

  @Override
  protected Void doInBackground(Void... voids) {
    downloadRSS();
    return null;
  }

  @Override
  protected void onPostExecute(Void aVoid) {
    if(list.size()>0) RssManager.getInstance().mOnRssDownloadedListener.onRssDownloaded(list);
    if(isError) RssManager.getInstance().mOnRssErrorListener.onRssError("Error while downloading RSS: "+errorMsg);
  }
  
  private void downloadRSS(){
      InputStream dis = null;
      try {
        dis = (InputStream) new URL(url).getContent();
      } catch (MalformedURLException e) {
        isError = true;
        errorMsg = e.getMessage();
        e.printStackTrace();
      } catch (IOException e) {
        isError = true;
        errorMsg = e.getMessage();
        e.printStackTrace();
      }
      SAXParserFactory factory = SAXParserFactory.newInstance();
    
      SAXParser parser = null;
      try {
        parser = factory.newSAXParser();
      } catch (ParserConfigurationException e) {
        isError = true;
        errorMsg = e.getMessage();
        e.printStackTrace();
      } catch (SAXException e) {
        isError = true;
        errorMsg = e.getMessage();
        e.printStackTrace();
      }
      RssHandler h = new RssHandler(list);
      try {
        parser.parse(dis,h);
      } catch (SAXException e) {
        isError = true;
        errorMsg = e.getMessage();
        e.printStackTrace();
      } catch (IOException e) {
        isError = true;
        errorMsg = e.getMessage();
        e.printStackTrace();
      }
  }  
}

Java Source Code List

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