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?
[...] is there any official statement from them directing us not to do so?
I think there is though I can't seem to find it in my notes. I know I found such a statement when trying to have a scroll view in a list activity. I think there is actually a logical focus "bug" in the way the Android UI system deals with nested scrollables which probably should be better detected and communicated to the developer. But my advice is...
In the end it is better to consider a single scrollable view for the sake of the user anyway. It's like having scroll bars inside scroll bars on an HTML page; it may be legal but its a terrible user experience.