What is the best way to fetch data from site in android?

I want to develop an android app for a site. I have following options:

1. A Native Android Application
2. A HTML 5 rendered on the Web view built into a Native app
3. Throw in some Responsive Design into the front-end of your Web-app with HTML 5 and JavaScript.

I don't have access to the database. The site is given, what I need to do is to fetch data from site and displays it with listview, textView and imageview. Here I think I have a few options too: 1. Use a parser 2. Use rss feed.

I am confused about these two options. Please suggest me any better idea.

P.S. : I know the question is too broad, and can be downvoted.

via Chebli Mohamed