Update Datalist after a Button is pressed in Android



I have a list of T-objects. Each of this objects has a list of S-objects. I want to show the List<S>-data. That for I am using nested RecyclerView.

Since I want to change the data of the S-objects at runtime I use EditText to show and edit the data.

When a button is pressed I want to save all changed S-objects in the list of the seleceted T obeject.

How and in which class can I iterate this List<S>? Are DataObservers the way to go? But I can not find any good examples of this observers.


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