Hi I have a bit of an issue with my rotary input My app cras

Question

Hi I have a bit of an issue with my rotary input My app crashes with this friendly error message FocusRequester is not initialized Here are some possible fixes 1 Remember the FocusRequester val focusRequester = remember FocusRequester 2 Did you forget to add a Modifier focusRequester 3 Are you attempting to request focus during composition Focus requests should be made in response to some event Eg Modifier clickable focusRequester requestFocus 1 and 2 are done As for 3 that may be the problem but I am not sure what I am doing wrong Please could someone have a look at my code in thread

Nat Strangerweather · Answer

My code ``` val focusRequester = remember FocusRequester ScalingLazyColumn state = scalingLazyListState modifier = Modifier fillMaxSize onRotaryScrollEvent scope launch scalingLazyListState scrollBy it verticalScrollPixels true focusRequester focusRequester focusable anchorType = ScalingLazyListAnchorType ItemStart contentPadding = PaddingValues horizontal = 8 dp horizontalAlignment = Alignment CenterHorizontally LaunchedEffect key1 = Unit focusRequester requestFocus ```

Nat Strangerweather · Answer

This error happens in a very specific situation only If I update my newsfeed and don t wait for it to load and click on a different newsfeed while this is happening

yschimke · Answer

Does it have 0 items in that state But I don t see why that would cause it

yschimke · Answer

Does it happen while that screen with the SLC is now in the background

Nat Strangerweather · Answer

Yes it does Maybe I could make a video if that would help

yschimke · Answer

Possibly But I think more filing a bug with this info and the video

yschimke · Answer

The other thing to try wear compose 1 2 has some focus helpers that mean you don t need to call requestFocus yourself

yschimke · Answer

And Horologist has a ScalingLazyColumn overload that does all this for you

Nat Strangerweather · Answer

ok I am on ```wear compose version = 1 2 0 alpha07 ```

yschimke · Answer

rememberActiveFocusRequester

Nat Strangerweather · Answer

Thanks will give this a shot

Nat Strangerweather · Answer

So I have the same problem with Compose 1 2 using `rememberActiveFocusRequester `

Nat Strangerweather · Answer

I d be happy to try the Horologist ScalingLazyColumn but is there an example that I can use

yschimke · Answer

Tons for example <https github com google horologist blob main sample src main java com google android horologist sample MenuScreen kt>

yschimke · Answer

These all get passed in the column state from the navigation scaffold WearNavScaffold

Nat Strangerweather · Answer

Thanks I was clearly looking in the wrong place lol

yschimke · Answer

But if you want to try it for a single screen just pass in `ScalingLazyColumnDefaults belowTimeText create `

yschimke · Answer

It handles the RSB scrolling for you

yschimke · Answer

If you want it wired up to the TimeText and position indicator you can use that WearNavScaffold I mentioned like <https github com google horologist blob main sample src main java com google android horologist sample SampleWearApp kt>

Nat Strangerweather · Answer

Ok brilliant many thanks

Nat Strangerweather · Answer

This works fine blush