pavle93

Hello, I am new to this Forum and to Andorid developing in general. I am an high-school student that is in competition for University scholarship. I decide to take Android application as my project. The main idea came from my sister, she said let's make an app for girl which will track their period, ovulation etc. (girl stuff). Okay the idea is fin but then i came up with one problem, I need a calendar which will highlight days in specific color on button click, but i don't know how to do that, any help, advice, support will be really appreciate.

Thanks in advance,
Pavle.