Display News and Videos through RSS and Display it in Listview

Hi friends ,

In this tutorial ,i'm going to describe about how to fetch data from rss feed.Here i had also problem ,when i was developing my recent project.I had also faced  many problem and at last i developed my best project.



Here is the code that describe how to fetch news headline from rss
This class describes how to parse XML data:
import java.net.URL;
import java.util.ArrayList;



import org.xmlpull.v1.XmlPullParser;



import android.content.res.XmlResourceParser;
import android.util.Log;
import android.util.Xml;



public class XmlFeedParser {
   
    //Feed Parsing Method
    public ArrayList<Implement> parse(String url) {
       
        //Array of Episode Objects
        ArrayList<Implement> episodes = null;
        
        try {
            //Encode the URL into a URL Object
            URL episode_feed_url = new URL(url);
           
            //Open a Connection to the feed
            XmlPullParser parser = Xml.newPullParser();
            try {
                parser.setInput(episode_feed_url.openConnection().getInputStream(), null);
            } finally {
               
            }



            int event_type = parser.getEventType();
            Implement current_episode = null;
            boolean done = false;
            
            //Parse the feed, start reading throught the feed from top to bottom
            while (event_type != XmlResourceParser.END_DOCUMENT && !done){
               
                String tag_name = null;
                switch (event_type){
                    //Found the start of the feed
                    case XmlResourceParser.START_DOCUMENT:
                        episodes = new ArrayList<Implement>();
                        break;
                    //Found a start tag
                    case XmlResourceParser.START_TAG:
                       
                        //apply the data to our Episode object based on the tag name
                        tag_name = parser.getName();
                          Log.d("*********Current*********Tag*************", tag_name.toString());
                        if (tag_name.equalsIgnoreCase("item")){
                            current_episode = new Implement();
                        } else if (current_episode != null){
                            if (tag_name.equals("title")){
                                current_episode.setTitle(parser.nextText());
                                //Log.d("***********************DEBUG**************************",tag_name.toString( ));
                            } else if (tag_name.equals("pubDate")){
                                current_episode.setDate(parser.nextText());
                                //Log.d("***********************DEBUG**************************",tag_name.toString( ));
                            } else if (tag_name.equals("link")){
                                current_episode.setLink(parser.nextText());
                                //Log.d("***********************DEBUG**************************",tag_name.toString( ));
                            } else if (tag_name.equals("description")){
                                current_episode.setDescription(parser.nextText());
                                Log.d("*******************DESC*****************************",tag_name.toString( ));
                            }
                            
                        }
                        break;
                    //An end tag has been reached
                    case XmlResourceParser.END_TAG:
                        tag_name = parser.getName();
                        //End of an Episode Item
                        if (tag_name.equalsIgnoreCase("item") && current_episode != null){
                            episodes.add(current_episode);
                        //Reached the end of all episodes, no more data to collect
                        } else if (tag_name.equalsIgnoreCase("channel")){
                            done = true;
                        }
                        break;
                }
                event_type = parser.next();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        
        //Return the Episode Array
        return episodes;
    }



}
This class is used for manipulating parsed data:
import java.net.MalformedURLException;
import java.net.URL;



import android.util.Log;



public class Implement {
   
    //Episode data properties
    private String title;
    private String date;
    private URL link;
    private String imglink;
    private String description;
   
   
    //Getters and Setters for data
    public void setTitle(String title) {
        this.title = title;
    }
    public String getTitle() {
        return title;
    }
   
    public void setDate(String date) {
        this.date = date;
        Log.d("*******date*********", date.toString());
    }
    public String getDate() {
        return date;
    }
   
    public void setLink(String link) {
        try {
            this.link = new URL(link);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }
    public URL getLink() {
        return link;
    }
   
    public void setDescription(String description) {
        this.description = description;
       
        //parse description for any image or video links
        if (description.contains("<img ")){
            String img  = description.substring(description.indexOf("<img "));
       
            String cleanUp = img.substring(0, img.indexOf(">")+1);
            img = img.substring(img.indexOf("src=") + 5);
            int indexOf = img.indexOf("'");
            if (indexOf==-1){
                indexOf = img.indexOf("\"");
            }
            img = img.substring(0, indexOf);
           
            setImage(img);
           
            this.description = this.description.replace(cleanUp, "");
        }
    }
    /**
         * @return the description
     */
    public String getDescription() {
        return description;
    }



    public void setImage(String link) {
        this.imglink = new String(link);
        Log.d("*******image*********", imglink.toString());
    }
    public String getImage() {
       
        return imglink;
    }
   



}
And at last we display fetched data in listview
import java.net.URL;
import java.util.ArrayList;



import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.WebView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.Toast;



public class paper extends Activity implements OnItemClickListener {
   
    //RSS Feed URL
    private final String CGR_FEED_URL = "http://gdata.youtube.com/feeds/videos?author=JimmyRcom&orderby=updated&alt=rss&racy=include";
   
    //XML Widgets
    private ListView listview_episodes;
    private ProgressBar progress_bar;
   
    //Arrays of Episode Data
    public static ArrayList<String> episode_titles;
    private ArrayList<String> episode_dates;
    private ArrayList<URL> episode_link;
    private ArrayList<String> episode_image;
      ImageAdapter adapter;
    WebView mwebview;               
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.newyorktimes);
        
        //XML Widgets by ID
      //  Log.d("****Value**of**String****", mStrings.toString());
       mwebview=(WebView)findViewById(R.id.webview);
        mwebview.getSettings().setJavaScriptEnabled(true);
        mwebview.setVisibility(View.GONE);
        listview_episodes = (ListView) findViewById(R.id.listview_episodes);
        listview_episodes.setOnItemClickListener(this);
        progress_bar = (ProgressBar) findViewById(R.id.progress_bar);
        //Make Progress Bar Invisible
        progress_bar.setVisibility(ProgressBar.INVISIBLE);
        
        //Initialise Arrays
        episode_titles = new ArrayList<String>();
        episode_dates = new ArrayList<String>();
        episode_link = new ArrayList<URL>();
        episode_image=new ArrayList<String>();
        downloadEpisodes(CGR_FEED_URL);
        
    }
    
    private void downloadEpisodes(String Url) {
        //Make Progress Bar Visible While Downloading Feed
        progress_bar.setVisibility(ProgressBar.VISIBLE);
        Log.d("CGRParser", "Downloading Feed");
        //Start an ASync Thread to take care of Downloading Feed
        new DownloadEpisodes().execute(Url);
    }
    
    public class DownloadEpisodes extends AsyncTask<String, Integer, ArrayList<Implement>> {
       
        @Override
        protected ArrayList<Implement> doInBackground(String... url) {
           
            //Download and Parse Feed
            XmlFeedParser parser = new XmlFeedParser();
            ArrayList<Implement> episodes = new ArrayList<Implement>();
            episodes = parser.parse(url[0]);
           
            return episodes;
        }
       
        @Override
        protected void onPostExecute(ArrayList<Implement> result) {
               
            //Feed has been Downloaded and Parsed, Display Data to User
            Log.d("CGRParser", "Feed Download Complete");
            displayEpisodes(result);
           
        }



    }
    
    private void displayEpisodes(ArrayList<Implement> episodes) {
       
        //Create String Arrays to seperate titles and dates
        Log.d("CGRParser", "Displaying Episode Titles To User");
        ArrayList<String> episode_titles = new ArrayList<String>();
        ArrayList<String> episode_dates = new ArrayList<String>();
        ArrayList<URL> episode_link = new ArrayList<URL>();
        ArrayList<String>episode_image=new ArrayList<String>();
        for (Implement episode : episodes) {
            Log.d("CGRParser", "Episode Title: " + episode.getTitle());
            episode_titles.add(episode.getTitle());
            episode_dates.add(episode.getDate());
            episode_link.add(episode.getLink());
            episode_image.add(episode.getImage());
            //System.out.println("size of episode_image" + episode.getImage());



        }
       
        this.episode_titles = episode_titles;
        this.episode_dates = episode_dates;
        this.episode_link= episode_link;
        this.episode_image=episode_image;
       
         if(episode_image.size() >0)  
         { 
             String mStrings[] = new String[episode_image.size()];
             
             mStrings = episode_image.toArray(mStrings);
             adapter=new ImageAdapter(this, mStrings,episode_titles);
             listview_episodes.setAdapter(adapter);
for(int i=0;i<episode_image.size();i++) 
             Log.d("Value of mString", mStrings[i].toString());  
         }  
         
        // System.out.println("mstring"+mStrings[0].toString());
       
        Log.d("Value of Episode_image", episode_image.toString());
        Log.d("Value of Episode title", episode_titles.toString());
        //Create a ListAdapter to Display the Titles in the ListView
        ListAdapter adapter = new ArrayAdapter<String>(Technical.this, R.layout.episode_row, R.id.title, episode_titles);
        listview_episodes.setAdapter(adapter);
       
        //Set Progress Bar Invisible since we are done with it
        progress_bar.setVisibility(ProgressBar.INVISIBLE);
       
    }



    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
       
        //Display the Title and Date to the user when they click on an episode
        Toast.makeText(this, episode_titles.get(position) + ": " + episode_dates.get(position)+":"
                +episode_link.get(position)+":"+episode_image.get(position), Toast.LENGTH_LONG).show();
        mwebview.loadUrl(episode_link.get(position).toString());
        //mwebview.setVisibility(View.VISIBLE);
        //setContentView(R.layout.webview);
    }
   
   
     
     
   
}
Xml that has been used in the project:
<?xml version="1.0" encoding="utf-8"?>



<RelativeLayout android:id="@+id/relativeLayout1"
android:background="#483d8b"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <WebView
    android:id="@+id/webview"
    android:visible="false"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>
    <RelativeLayout android:layout_height="wrap_content"
        android:id="@+id/relativeLayout2" android:layout_alignParentTop="true"
        android:layout_width="fill_parent" >
       
        <ProgressBar android:layout_height="wrap_content" android:layout_width="wrap_content"
            android:layout_alignParentLeft="true" android:id="@+id/progress_bar"></ProgressBar>
       
    </RelativeLayout>
    <LinearLayout android:layout_alignParentBottom="true"
        android:id="@+id/list_holder" android:layout_below="@+id/relativeLayout2"
        android:layout_height="fill_parent" android:layout_width="fill_parent">
        <ListView android:id="@+id/listview_episodes"
            android:layout_height="fill_parent"
            android:layout_width="fill_parent"></ListView>
    </LinearLayout>
  
</RelativeLayout>



This xml is used to display in listview:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent" android:layout_height="match_parent">
        <TextView android:layout_toRightOf="@+id/icon"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/icon"
        android:layout_alignBottom="@+id/icon"
        android:layout_width="fill_parent"
        android:gravity="center_vertical"
        android:textColor="#ffffff"
         android:textSize="16sp"
         android:layout_marginLeft="10dip"
         android:id="@+id/title"></TextView>
</LinearLayout>