How to save/store multi dimensional list of objects in an Android Application?

If someone could think of a better way to ask this question that would be great as I'm not sure how to best sum it up.

In my application I currently have 3 types of class. A, B and C.

• My App holds a list of objects A.


• Class A has various arbitrary fields + a list of objects B.


• Class B has various arbitrary fields + a list of objects C.


• Class C is just a standard class with arbitrary fields.

What would be the best way to save the instances of these classes?

My current method would be to hold the main list of objects A in an extended Application class and then save the serialized list Object as a SharedPreference or in a database. Then load/save it up whenever the app restarted or paused etc. Would this be a good idea?

I know how to use SQL on android at a basic level and would use this if not for the multiple dimensions present. Is there a way to make it work with a database?

Any other advice would be appreciated. Thank you.