Observable Objects

[AlokBansal8]

Why isn't observable objects used?

[maberer]

The project shows an alternative and uses "SortedList" instead of observable fields.
https://developer.android.com/reference/android/support/v7/util/SortedList.html

Because you can use a SortedList.Callback mechanism to describe equality of list items,
adding/updating gets a whole lot easier:

https://developer.android.com/reference/android/support/v7/util/SortedList.Callback.html

Does this answer your question?