Android : How to realise array in array in SQL?

I am trying to rewrite the way I store data in my android app (from serialization to sql). But I still have problems how to achieve that (the structure) , here is what I have:

Class2: - few primitive data

Class1: - ArrayList of Class2 - few primitive data

I was thinking of how to structure this in lists but could not find a solution. I must have to admit that I am a total beginner in SQL. I have read a few tutorials and achieved to implement a database in a testapp and work with it - that's it.

I hope the question is clear - if not please tell me so.

Regards Tak3r07