I think LazyColumn and LazyColumnFor still have bug in the L

Question

I think LazyColumn and LazyColumnFor still have bug in the LazyListState scroll position my scenario I have list of items 100 items when I scroll down to say item no 30 then I filter the list so it only has 10 items it will crashed java lang IllegalStateException entered drag with non zero pending scroll 1403 0696 at androidx compose foundation lazy LazyListState onScroll$foundation release LazyListState kt 171 at androidx compose foundation lazy LazyListState$scrollableController$1 invoke LazyListState kt 144 On comparison when I use ScrollableColumn it works perfectly

Mohamed Elfiky · Answer

same issue

Jeremy · Answer

I ve also seen issue in alpha04 if one of the rows within LazyColumn is changed size it will leave a blank space rather than compress

Bsn Net · Answer

Guys do you know how to programmatically scroll to using LazyColumn

Andrey Kulikov · Answer

thanks for reporting we will fix it for alpha05

Andrey Kulikov · Answer

this bug from the stacktrace is probably already fixed in master so will be in a new release

Andrey Kulikov · Answer

Jeremy are you sure the issue with blank space is reproducible on alpha04 not alpha03 could you please file a bug

Bsn Net · Answer

< Andrey Kulikov> is there any scroll to function for lazyColumn

Andrey Kulikov · Answer

no we are still working on adding scrollTo methods on LazyListState it is not yet ready sorry

Bsn Net · Answer

Ok got it

Prashant Priyadarshi · Answer

< Andrey Kulikov> will the scrollTo function for LazyListState be available in compose alpha05

Prashant Priyadarshi · Answer

I am also getting the same error for below code screen is layed out but error is thrown on scroling `val listState = rememberLazyListState ` `initialFirstVisibleItemIndex = someIndex ` putting in stack trace message just for reference `java lang IllegalStateException entered drag with non zero pending scroll 657 0` `at androidx compose foundation lazy LazyListState onScroll$foundation release LazyListState kt 171 ` `at androidx compose foundation lazy LazyListState$scrollableController$1 invoke LazyListState kt 144 ` `at androidx compose foundation lazy LazyListState$scrollableController$1 invoke LazyListState kt ` `at androidx compose foundation gestures ScrollableKt$scrollable$4$scrollCallback$1 onScroll Scrollable kt 194 ` `at androidx compose ui gesture ScrollGestureFilterCoordinator$rawDragObserver$1 onDrag k 4lQ0M ScrollGestureFilter kt 177 ` `at androidx compose ui gesture RawDragGestureFilter onPointerInput e3WT7 U RawDragGestureFilter kt 348 ` `at androidx compose ui input pointer PointerInputFilter onPointerEvent d1fqKvQ PointerEvent kt 65 ` `at androidx compose ui input pointer Node dispatchToPointerInputFilter HitPathTracker kt 536 ` `at androidx compose ui input pointer Node dispatchChanges HitPathTracker kt 436 ` `at androidx compose ui input pointer Node dispatchChanges HitPathTracker kt 432 ` `at androidx compose ui input pointer NodeParent dispatchChanges HitPathTracker kt 286 ` `at androidx compose ui input pointer HitPathTracker dispatchChanges HitPathTracker kt 133 ` `at androidx compose ui input pointer PointerInputEventProcessor process EhkylT0 PointerInputEventProcessor kt 72 ` `at androidx compose ui platform AndroidComposeView dispatchTouchEvent AndroidComposeView kt 613 ` `at android view ViewGroup dispatchTransformedTouchEvent ViewGroup java 2555 ` `at android view ViewGroup dispatchTouchEvent ViewGroup java 2254 ` `at android view ViewGroup dispatchTransformedTouchEvent ViewGroup java 2555 ` `at android view ViewGroup dispatchTouchEvent ViewGroup java 2254 ` `at android view ViewGroup dispatchTransformedTouchEvent ViewGroup java 2555 ` `at android view ViewGroup dispatchTouchEvent ViewGroup java 2254 ` `at android view ViewGroup dispatchTransformedTouchEvent ViewGroup java 2555 ` `at android view ViewGroup dispatchTouchEvent ViewGroup java 2254 ` `at android view ViewGroup dispatchTransformedTouchEvent ViewGroup java 2555 ` `at android view ViewGroup dispatchTouchEvent ViewGroup java 2254 ` `at com android internal policy PhoneWindow$DecorView superDispatchTouchEvent PhoneWindow java 2403 ` `at com android internal policy PhoneWindow superDispatchTouchEvent PhoneWindow java 1737 ` `at android app Activity dispatchTouchEvent Activity java 2769 ` `at androidx appcompat view WindowCallbackWrapper dispatchTouchEvent WindowCallbackWrapper java 69 ` `at com android internal policy PhoneWindow$DecorView dispatchTouchEvent PhoneWindow java 2364 ` `at android view View dispatchPointerEvent View java 9517 ` `at android view ViewRootImpl$ViewPostImeInputStage processPointerEvent ViewRootImpl java 4242 ` `at android view ViewRootImpl$ViewPostImeInputStage onProcess ViewRootImpl java 4108 ` `at android view ViewRootImpl$InputStage deliver ViewRootImpl java 3654 ` `at android view ViewRootImpl$InputStage onDeliverToNext ViewRootImpl java 3707 ` `at android view ViewRootImpl$InputStage forward ViewRootImpl java 3673 ` `at android view ViewRootImpl$AsyncInputStage forward ViewRootImpl java 3799 ` `at android view ViewRootImpl$InputStage apply ViewRootImpl java 3681 ` `at android view ViewRootImpl$AsyncInputStage apply ViewRootImpl java 3856 ` `at android view ViewRootImpl$InputStage deliver ViewRootImpl java 3654 ` `at android view ViewRootImpl$InputStage onDeliverToNext ViewRootImpl java 3707 ` `at android view ViewRootImpl$InputStage forward ViewRootImpl java 3673 ` `at android view ViewRootImpl$InputStage apply ViewRootImpl java 3681 ` `at android view ViewRootImpl$InputStage deliver ViewRootImpl java 3654 ` `at android view ViewRootImpl deliverInputEvent ViewRootImpl java 5969 ` `at android view ViewRootImpl doProcessInputEvents ViewRootImpl java 5908 ` `at android view ViewRootImpl enqueueInputEvent ViewRootImpl java 5869 ` `at android view ViewRootImpl$WindowInputEventReceiver o`

Andrey Kulikov · Answer

this crash will be fixed in alpha05 scrollTo will not make it to alpha 05 sorry