Can Anyone Please explain the problem of RecyclerView with DataBinding?

[kaustav07]

I was reading about the problem explaind in page 394 of the book about the layout file not knowing that i updated SoundViewModel’s Sound inside SoundHolder.bind(Sound"), i cannot understand what is the problem its talking about, every time i bind a new Sound object with a Viewholder but the Sound object’s position in the List from which i am taking is not changing then why we are getting repeated tiles with other sound names?

this might be bit naive question on my part but just cannot understand it, can anyone please explain?

[Srinath]

It is answered in a future post, check the link:

Not seeing written behavior on page 394 using APIs above 19

Ah. OK, I see what you are saying. It’s possible that there has been some change in the RecyclerView or DataBinding library where this particular issue no longer shows up. It could also be a factor of how many items are in the list and the screen size. Either way, it continues to be very important that you use BaseObservable and notifyChange when you change the data in a view model. Otherwise, the view model can’t know when to refresh the view. So, it may not be an issue in this case, but it wi…

[curtisFj]

This is not an answer to the question. The reason behind the behavior still hasn’t been conclusively explained.