Modification in feature:
On selecting quantities to add to the cart, the "No" and "Add to cart" options have a very light colour, it looks like they are disabled buttons.
Solution:
Change their color to Primary color of the theme.
Modification in Feature
On the Main Activity, pressing back button displays seek bar with the text "Press back once more to logout"
Suggested Solution
Pressing the back button should not log out user from the Application. It should exit the application or close the Navigation Drawer(If it is opened.)
Alternative Solution
Logout option can also be displayed in the option menu.