Firebase Database Error - Expected a Map while deserializing, but got a class java.util.ArrayList

Question

Edit: Figured it out, check my posted answer if you\'re having similar issues.

I know there are several questions about this issue, but none of their s

Answer 1

The main issue is that you are using a List instead of a Map. As your error said, while deserializing it is expectig a Map but is found an ArrayList.

So in order to solve this problem youd need to change all the lists in your model with maps like this:

private Map mMapOne;

After changing all those fileds like this, you need also to change your public setters and getters.

Hope it helps.