hi

hello terence!

how can I help you today?

my layout contains a scrollview with a LinearLayout. This LinearLayout has a cardview that I'd like to scroll to the top programatically. I tried Completable.fromRunnable({ scroll_view.smoothScrollTo(0, card_view.top }).subscribe() and nothing happens

are you sure that you are getting control in that lambda expression?

if you are, is card_view.top returning the value that you expect?

yes to both

I have not used smoothScrollTo() on a ScrollView, so I am not certain whether there are any particular problems with it

if you switch to scrollTo(), does that work? it may not be what you want, but it would be a possibly-useful clue

let me try

clicking on the card_view takes you to a selection screen. when you select something, you add to a list the sits at the bottom of the card_view. That is why I want to scroll the card_view to the top. scrollTo did not work

you might be better off switching to RecyclerView and updating your adapter, rather than manually adding things to the layout

i am using that

since RecyclerView knows how to scroll, where does the ScrollView come into play?

There are other items on the screen above this card_view

aren't they just items in the RecyclerView?

while Google has tried to get nested scrolling things to work (e.g., NestedScrollView), personally I try to avoid them

perhaps i neeed to use nestedscrollview

if you are using a ScrollView inside of a RecyclerView, I could see where that might cause problems

and NestedScrollView might help

I am using a recylclerview in a scrollview

that too might need to switch to NestedScrollView, though personally I would try to eliminate the ScrollView entirely and put everything into the RecyclerView

alright

as a user, I get irritated when things scroll oddly (e.g., you swipe in one spot and the whole thing scrolls; you swipe in a different spot and only part of the stuff scrolls)

and that's why I try to avoid nested scrolling things, beyond any programming challenges

(note: my concern is scrolling in the same direction -- having a mix of horizontal and vertical scrolling nested is less of an issue)

thanks

that was my only question

OK, sorry I did not have a "magic bullet" solution for you

it's ok