ScrollView Inside ScrollView

Question

I Know people from Google have asked us not to put Scrollable view inside another Scrollable view but is there any official statement from them directing us not to do so?

Answer 1

Actually, there is an official statement about it, on a quite old video called "the world of ListView". They say not to put any scrollable view inside another one (when both are in the same direction).

However, now we have a new view that allows both views to scroll at the same time, probably to show a cool effect:

https://developer.android.com/reference/android/support/v4/widget/NestedScrollView.html

I didn't find any example for this, so what I wrote is just a guess of what it does and what it's used for.