This project is a sample app for using CardView within RecyclerView. Check out my blog post about this project here: Android CardView Sample Project (with RecyclerView).
When I started to implement my own project I was surprised that I couldn't find even one sample project for how to use CardView in an app.
This project follows the official guidelines from the official Android Developers page: https://developer.android.com/training/material/lists-cards.html
And also used the some of the code in this guide: