This is a sample collection app created while studying the basics of Android.
On the blog you can see basic explanations that match the content with code examples.
I have uploaded the code used on github. You can quickly get what you need and use it.

Blog address: https://growing-software-engineer.tistory.com/category/%EC%95%88%EB%93%9C%EB%A1%9C%EC%9D%B4%EB%93%9C% 20%EA%B8%B0%EC%B4%88%20%EC%A7%80%EC%8B%9D

github address: https://github.com/tvroom88/AIO_Android