What are thee Design constrains for android application of online shopping?

Below There are functional requirements that would help you to identify the design constrains.

1. The system shall provide the facility to see the store on map to customer.
2. The system shall provide the facility to select the store from map to customer.
3. The system shall provide the facility to search the items without selection of store to customer.
4. The system shall provide the facility to search the items after the selection of store to customer.
5. The system shall provide the facility to see the items of selected store to customer.
6. The system shall provide the facility to select the items to customer.
7. The system shall provide the facility to see the details of items to customer.
8. The system shall provide the facility to select quantity of items to customer.
9. The system shall provide the facility to add items into the cart to customer.
10. The system shall provide the facility to remove items from the cart to customer.
11. The system shall provide the facility to view cart to customer.
12. The system shall provide the facility to place an order to customer.
13. The system shall provide the facility to see the total price of order to customer.