How to get a detailed data of a specific list view item

hi i have build a rss by watching ibm tutorial . In this i get a list view of rss feeds. i have a class showdescription in which i am taking the description of the specific list view item.

But it does not show the descriton on item click.

here is my code for onclicklistener

 public void onItemClick(AdapterView parent, View v, int position, long id)
 {
     Log.i(tag,"item clicked! [" + feed.getItem(position).getTitle() + "]");

     Intent itemintent = new Intent(this,ShowDescription.class);

     Bundle b = new Bundle();
     b.putString("title", feed.getItem(position).getTitle());
    开发者_如何学运维 b.putString("description", feed.getItem(position).getDescription());
     b.putString("link", feed.getItem(position).getLink());
     b.putString("pubdate", feed.getItem(position).getPubDate());

     itemintent.putExtra("android.intent.extra.INTENT", b);

     startSubActivity(itemintent,0);
 }

and this code shows error in startSubActivity and ask to implement its method which is

private void startSubActivity(Intent itemintent, int i) {
    // TODO Auto-generated method stub  
}

but it does not shows the details of particular item