Anybody tried LazyColumn or LazyGrid on Android TV...

# compose

[Afzal Najam]

Anybody tried LazyColumn or LazyGrid on Android TV? For me, they don't scroll down. See the attached video, first example is with LazyColumn, second one is just Column with verticalScroll modifier.

Edit: Looks like this is related to d-pad navigation because when I swipe using scrcpy, all the rows are there.

Screen Recording 2021-12-31 at 3.12.05 PM.mov

[sorianog]

Do you think it’s a bug with your code or bug with compose in general? What did any official forums say about it?

[Afzal Najam]

I think it's a bug with Compose given that swiping works fine and because there's been issues with d-pad navigation in compose in the past but I'm open to suggestions. The roadmap says d-pad navigation is in-focus so I'm guessing this would be the right time to bring up any bugs with it.

[sorianog]

Bet they’d appreciate your video and a report of what is happening! 🤔

[Afzal Najam]

In the past, I've posted here and verified a behaviour before submitting an issue.

[Jon Boekenoogen]

There is a known issue on lazy lists not scrolling at the moment

[Jon Boekenoogen]

Already on the issue tracker

[FunkyMuse]

@Jon Boekenoogen is it for Android TV only or for Phones too?

[Jon Boekenoogen]

Lazy list scrolling with dpad in general (tv, chrome os, phones)

[Tarjeison]

We’ve solved this by using rememberLazyListState and scrollBy(px) to center the items upon focus (scrollToIndex() also should work). We’re on version 1.0.5. We experienced the same issue as you, and it seems it’s related to the items not being visible.

[Afzal Najam]

@Tarjeison Did that completely solve the problem? I tried scrollBy and scrollToIndex , I think scrollBy worked but animateScrollBy didn’t.

Would it be possible for you to share that part of the code by any chance?

[Tarjeison]

I think this is an issue which occurred in version 1.1.0 and might be the same same as this issue: https://issuetracker.google.com/issues/212982472
I’ve also added a gist in the issue.

My team decided to wait for a built in focus navigation support for compose before implementing it on AndroidTV.
https://issuetracker.google.com/issues/184670295

[Afzal Najam]

Ah, that makes a lot of sense because I only tried it with 1.1.0. I see that Ralston Da Silva is actively working on it in this CL: https://android-review.googlesource.com/c/platform/frameworks/support/+/1967229.

Looks like a while before it’s all done though. I tried it locally a few patch sets ago 🙂