Credits : Help with setting up List View to hold items : https://www.youtube.com/watch?v=F73tf7ySAZU&t=7s

Where I got the idea to use a switch statement for increment, decrement and reset : https://www.youtube.com/watch?v=7d6iKupzkEg

Where I learned about Intent and passing data between activities : https://stackoverflow.com/questions/920306/sending-data-back-to-the-main-activity-in-android