RecyclerView in Fragment – How to retrieve data from an Array List

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Roeben Pierce Boyles | 12 xp

So I saw this tutorial that creates a recyclerview in fragments of navigation drawer. In this tutorial, the data is store in an array. What I am trying to do right now is to store the data in an ArrayList.

Here is my code in ‘Tutor’ Fragment

 

This is the code of my Adapter:

And this my getter/setter code:

When I try to run the app, it crashes.