If you have Hikashop extensions already in website than simple now to make application for your website in andriod native application.
Purchase from there now : http://harmis-hikashop.com/
Something to sell and your willing to expand to the mobile app market then this app is for you, with the mobile app the fastest market growing at the fastest pace year on year.Category , product , user , Order everything manage from the Hikashop extensions.All record also store in Hikashop.
You can have an app running just like this has been setup but you can choose your colour theme you desire from back-end. Simple logo change and color theme change after application ready for you.
PayPal has been integrated into this app and if you are a PayPal merchant this app also accepts credit card transactions but this only applies to customers who have a PayPal merchant account.
Right now you want that product than contact me at : email@example.com