Hello all having trouble wrapping my head around an infinite kotlinlang #compose

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Title

b

Billy Newman

06/20/2022, 6:51 PM

Hello all, having trouble wrapping my head around an infinite lazycolumn using the pager v3 library. I would like to scroll up infinitely as new “un-viewed” items are available. This means that on initial load of the view, I would like to start the user at the bottom of the list, not the top.

Currently I am scrolling to the last item a user has viewed, in the case of never viewed I start them at the bottom. To do both scrolls I am using:

val listState = rememberLazyListState()
listState.scrollToItem(index)

However I think that is pretty inefficient on first load, or a load with a lot of un-viewed items. Assuming that scrollToItem(index) is loading each item as it scrolls.

d

dorche

06/20/2022, 7:48 PM

rememberLazyListState takes index of the item that should be visible

i

Ian Lake

06/20/2022, 7:55 PM

Generally, that's the use case for LazyColumn's

reverseLayout

, which starts you at the bottom and you scroll up to view more

☝️ 1

b

Billy Newman

06/20/2022, 7:58 PM

@dorche thanks, missed that. Guess I need some sleep ;). Ian agreed, I just saw that option messing around with it now. Seems that in combination with constructing the list state with the right index is the way to go.

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