I need to Create an Android app to show others a collection of five to eight items that you intend to sell through your app. Choose any items you...

I need to Create an Android™ app to show others a collection of five to eight items that you intend to sell through your app. Choose any items you desire.

Include the following features and functions in your app:

• An opening screen that displays the names of your list of the items with a button to select the ones you want to buy (4pts)
• A second screen that displays an explanation or description of the item and the price when the user selects an item (4 pts)
• Functionality allowing the user to place items into a shopping cart (2 pts)

and I dont know how and can not find any information on it. Anything you can offer to help would be appreciated.