How to get make Author and Date show up in listview

I’m not sure if this is better-suited for the skinning sub-forum of Development, but I figured I’d start here. If it is I don’t mind it being moved at all. I’ve been building an add-on in my free time that I hope to eventually submit to the official repo (waaayyy down the road) and I’m having some trouble with getting the view I would like to display all my listitem details to show any information aside from the actual list. I’m trying to get the Media Info setup

[Image: 300px-Movielibrary_mediainfo.png]

(as found on the Video Navigation wiki page). First thing I should mention is that my addon is a program addon, not a video addon. Will that make a difference? Will that prevent me from being able to accomplish this? I use the following code to set the addon’s content-type to movies in hopes of utilizing the view

Code:
# Get the plugin url in plugin:// notation.
_url = sys.argv[0]
# Get the plugin handle as an integer number.
_handle = int(sys.argv[1])
xbmcplugin.setContent(_handle, 'movies')

Secondly, I know that layouts are dependent upon the skin the user is currently using. I’m currently using the stock Krypton skin (forget the name) and I also have Xonfluence to test with. Shouldn’t the Krypton default skin have this view? Below is what my menu is currently looks like
[Image: FyKbT9l.jpg]
However, I’ve tried placing a test Date on all of the listitems to see if it would show up in the pane on the right side of the screen, but no luck.

Code:
for item in notifications:
    if reasons[item['reason']] == 'show':
        list_item = xbmcgui.ListItem(label=item['subject']['title'])
                    
        list_item.setInfo('date', '2017-05-22 15:39:30')
                    
        url = get_url(action='view_notification',choice=item['id'], url=item['subject']['url'])
        is_folder = True
        xbmcplugin.addDirectoryItem(_handle, url, list_item, is_folder)
xbmcplugin.addSortMethod(_handle, xbmcplugin.SORT_METHOD_NONE)

Do I need to do something else to make it show up on the right-hand side of the screen? I’d like to have it display the author, date, and a short summary that I’d create on the fly.