Create an Android App for real time search

Create an Android App for real time search The app is similar to <[login to view URL]> Which is for cars for sale, but we need it for "Homes for sale". There is one for real estate <[login to view URL]> but we can not copy it and or crawl their site. We currently operate a portal and collect listing for our DB via cron jobs and or via API from other web sites and or crawling the web. This app shall produce results with or with out a DB (real time or stored listings) and we should be able to search for homes on the mobile devices as well as provide feed to other web sites. All suggestions for better implementations are welcome, but please no one liners or sending me ton of unrelated websites etc. Show me that you have developed this or produce a mockup before we get serious.