Is it normal that AdapterList is overlap with Button? And, when I try to click Button more than 20 times, VerticalScroller is fine. But, in AdapterList, my app is stopped with java.lang.IndexOutOfBoundsException: Index: 8, Size: 8. And whatever the numbers are, it just says Index: 8, Size: 8. Plese someone correct my code. Thank you.

I am seeing this exception with AdapterList too

it might be helpful if you posted the stacktrace of the exception you’re getting

2020-03-06 13:09:11.323 29786-29786/com.thawdezin.violet E/AndroidRuntime: FATAL EXCEPTION: main

Process: com.thawdezin.violet, PID: 29786

java.lang.IndexOutOfBoundsException: Index: 8, Size: 8

at java.util.ArrayList.get(ArrayList.java:437)

at androidx.ui.foundation.ListState$composeChildForDataIndex$3$1.invoke(AdapterList.kt:448)

at androidx.ui.foundation.ListState$composeChildForDataIndex$3$1.invoke(Unknown Source:0)

at androidx.compose.ObserveKt.Observe(Observe.kt:37)

at androidx.ui.foundation.ListState$composeChildForDataIndex$3.invoke(Unknown Source:11)

at androidx.ui.foundation.ListState$composeChildForDataIndex$3.invoke(Unknown Source:0)

at androidx.compose.Recomposer$recompose$1.invoke(Recomposer.kt:61)

at androidx.compose.Recomposer$recompose$1.invoke(Recomposer.kt:19)

at androidx.compose.ViewComposerKt.runWithCurrent(ViewComposer.kt:387)

at androidx.compose.Recomposer.recompose(Recomposer.kt:51)

at androidx.compose.Recomposer.access$recompose(Recomposer.kt:19)

at androidx.compose.Recomposer$Companion.recompose$compose_runtime_release(Recomposer.kt:42)

at androidx.compose.Composition.compose(Composition.kt:67)

at androidx.compose.Composition.compose(Composition.kt:59)

at androidx.compose.Compose$subcomposeInto$1.invoke(Compose.kt:253)

at androidx.compose.Compose$subcomposeInto$1.invoke(Compose.kt:23)

at androidx.compose.ViewComposerKt.runWithComposing(ViewComposer.kt:397)

at androidx.compose.Compose.subcomposeInto(Compose.kt:252)

at androidx.ui.foundation.ListState.composeChildForDataIndex-N7Qnm20(AdapterList.kt:447)

at androidx.ui.foundation.ListState.recomposeAllChildren(AdapterList.kt:358)

at androidx.ui.foundation.ListState.recomposeIfAttached(AdapterList.kt:352)

at androidx.ui.foundation.AdapterListKt.AdapterList(AdapterList.kt:486)

at androidx.ui.foundation.AdapterListKt.AdapterList$default(AdapterList.kt:463)

at com.thawdezin.violet.LayoutTestingActivity.MainView(LayoutTestingActivity.kt:75)

at com.thawdezin.violet.LayoutTestingActivity$MainView$5.invoke(Unknown Source:4)

at com.thawdezin.violet.LayoutTestingActivity$MainView$5.invoke(Unknown Source:0)

at androidx.compose.RecomposeScope.compose(Composer.kt:208)

at androidx.compose.Composer.composeScope(Composer.kt:1206)

at androidx.compose.Composer.recomposeComponentRange(Composer.kt:1152)

at androidx.compose.Composer.skipCurrentGroup(Composer.kt:1201)

at androidx.compose.Composer.recompose(Composer.kt:1270)

at androidx.compose.Recomposer$performRecompose$1.invoke(Recomposer.kt:88)

at androidx.compose.Recomposer$performRecompose$1.invoke(Recomposer.kt:19)

at androidx.compose.ViewComposerKt.runWithCurrent(ViewComposer.kt:387)

at androidx.compose.Recomposer.performRecompose(Recomposer.kt:83)

at androidx.compose.Recomposer.dispatchRecomposes(Recomposer.kt:114)

at androidx.compose.AndroidRecomposer$frameCallback$1.doFrame(Recomposer.kt:27)

at android.view.Choreographer$CallbackRecord.run(Choreographer.java:947)

at android.view.Choreographer.doCallbacks(Choreographer.java:761)

at android.view.Choreographer.doFrame(Choreographer.java:693)

at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)

at android.os.Handler.handleCallback(Handler.java:873)

at android.os.Handler.dispatchMessage(Handler.java:99)

at android.os.Looper.loop(Looper.java:214)

at android.app.ActivityThread.main(ActivityThread.java:7094)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)

I see it when I scroll quickly and exit the activity right after scrolling. Here's the code

AdapterList(data = personList) { person ->
        Row(modifier = LayoutWidth.Fill + LayoutPadding(16.dp)) {
            Card(shape = RoundedCornerShape(4.dp), color = Color.Black, modifier = LayoutWidth.Fill) {
                Text(
                    person.name, style = TextStyle(
                        color = Color.White,
                        fontSize = 20.sp,
                        textAlign = TextAlign.Center
                    ), modifier = LayoutPadding(16.dp)
                )
            }
        }
    }

looks like a bug in adapterlist. i’m not sure if it’s known issue or not, but the author will probably see this thread soon and let you know 🙂 if not, i’ll ping him about it tomorrow

for future reference, where's the best place to report this?

Thank you @Leland Richardson [G] and @Vinay Gaba 🥰

There’s an issuetracker link in the description of this slack channel

Is it normal that AdapterList is overlap with Button?

yep, known bug: https://issuetracker.google.com/149976090