此外，只有当ListView是活动屏幕时，应用程序才会崩溃。否则，它不会崩溃/不会引发此indexoutofboundexception。我已经调试了应用程序逻辑，并确保有检查来忽略任何索引大于列表大小的更新/添加/删除请求。我怀疑异常只在重新组合时引发。我还观察到的另一种行为是当列表滚动到底部并且项目被删除时，此异常已经在循环的开始处引发。请查看堆栈跟踪。
致命异常: 主要进程: com.XXX.YYY.ZZZ, PID: 16225 java.lang.IndexOutOfBoundsException: 索引 6，大小 6 在 androidx.compose.foundation.lazy.layout.MutableIntervalList.checkIndexBounds(IntervalList.kt:177) 中 at androidx.compose.foundation.lazy.layout.MutableIntervalList.get(IntervalList.kt:160) at androidx.compose.foundation.lazy.layout.DefaultLazyLayoutItemsProvider.getKey(LazyLayoutItemProvider.kt:232) at androidx.compose.foundation.lazy.LazyListItemProviderImpl.getKey(Unknown Source:2) at androidx.compose.foundation.lazy.layout.DefaultDelegatingLazyLayoutItemProvider.getKey(LazyLayoutItemProvider.kt:201) at androidx.compose.foundation.lazy.LazyListItemProviderKt$rememberLazyListItemProvider$1$1.getKey(Unknown Source:2) at androidx.compose.foundation.lazy.LazyMeasuredItemProvider.getAndMeasure-ZjPyQlc(LazyMeasuredItemProvider.kt:46) at androidx.compose.foundation.lazy.LazyListMeasureKt.measureLazyList-Hh3qtAg(LazyListMeasure.kt:164) at androidx.compose.foundation.lazy.LazyListKt$rememberLazyListMeasurePolicy$1$1.invoke-0kLqBqw(LazyList.kt:299) at androidx.compose.foundation.lazy.LazyListKt$rememberLazyListMeasurePolicy$1$1.invoke(LazyList.kt:190) at androidx.compose.foundation.lazy.layout.LazyLayoutKt$LazyLayout$1$2$1.invoke-0kLqBqw(LazyLayout.kt:71) at androidx.compose.foundation.lazy.layout.LazyLayoutKt$LazyLayout$1$2$1.invoke(LazyLayout.kt:69) at androidx.compose.ui.layout.LayoutNodeSubcompositionsState$createMeasurePolicy$1.measure-3p2s80s(SubcomposeLayout.kt:598) at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:103) at androidx.compose.ui.graphics.SimpleGraphicsLayerModifier.measure-3p2s80s(GraphicsLayerModifier.kt:635) at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:155) at androidx.compose.foundation.layout.SizeModifier.measure-3p2s80s(Size.kt:781) at androidx.compose.ui.node.BackwardsCompatNode.measure-3p2s80s(BackwardsCompatNode.kt:323) at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:155) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$performMeasure$2.invoke(LayoutNodeLayoutDelegate.kt:1090) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$performMeasure$2.invoke(LayoutNodeLayoutDelegate.kt:1086) at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:2200) at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:234) at androidx.compose.runtime.snapshots.SnapshotStateObserver$observeReads$1$1.invoke(SnapshotStateObserver.kt:230) at androidx.compose.runtime.SnapshotStateKt__DerivedStateKt.observeDerivedStateRecalculations(DerivedState.kt:341) at androidx.compose.runtime.SnapshotStateKt.observeDerivedStateRecalculations(Unknown Source:1) at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:230) at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:120) at androidx.compose.ui.node.OwnerSnapshotObserver.observeMeasureSnapshotReads$ui_release(OwnerSnapshotObserver.kt:107) at androidx.compose.ui.node.LayoutNodeLayoutDelegate.performMeasure-BRTryo0(LayoutNodeLayoutDelegate.kt:1086) at androidx.compose.ui.node.LayoutNodeLayoutDelegate.access$performMeasure-BRTryo0(LayoutNodeLayoutDelegate.kt:36) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$MeasurePassDelegate.remeasure-BRTryo0(LayoutNodeLayoutDelegate.kt:342) at androidx.compose.ui.node.LayoutNode.remeasure-_Sx5XlM$ui_release(LayoutNode.kt:1188) at androidx.compose.ui.node.LayoutNode.remeasure-_Sx5XlM$ui_release$default(LayoutNode.kt:1179) at androidx.compose.ui.node.MeasureAndLayoutDelegate.doRemeasure-sdFAvZA(MeasureAndLayoutDelegate.kt:309) at androidx.compose.ui.node.MeasureAndLayoutDelegate.remeasureAndRelayoutIfNeeded(MeasureAndLayoutDelegate.kt:434) 2023-07-03 15:30:55.228 16225-16225 AndroidRuntime com.com.XXX.YYY.ZZZ E
我正在使用以下的Jetpack Compose版本：
```kotlin
ext.composeCompilerVersion = 1.4.3
ext {
compose_version = composeCompilerVersion // COMPOSE编译器版本
}
```
以下是用于显示ListView的示例组合函数。
@Composable
fun ListViewInternalTest(
elements2: List<MyType>
) {
val listState = rememberLazyListState()
LazyColumn(
modifier = Modifier
.height(pixelToDp(pixelSize = 792))
.simpleVerticalScrollbar(state = listState),
state = listState
) {
items(
elements2.size
) { index ->
Column() {
Row(
modifier = Modifier
.padding(start = pixelToDp(pixelSize = 35))
.height(pixelToDp(pixelSize = 130)),
verticalAlignment = Alignment.CenterVertically
) {
if(index < elements2.size) {
val element = elements2.getOrNull(index)
if (element != null) {
Text(
modifier = Modifier
.align(Alignment.Center)
.width(pixelToDp(pixelSize = 202))
.alpha(1f),
text = "CH " + element.someMember.toString()
)
}
}
}
}
}
}
}
val myList = mutableStateListOf<MyType>()
fun insertItemToMyListAtIndex(index: Int, argMyType: MyType){
if(index >= 0 && index <= myList.size) {
myList.add(index, argMyType)
}
}
fun updateItemInMyListAtIndex(index: Int, argMyType: MyType) {
if(index>= 0 && index< myList .size) {
myList[index] = argMyType
}
}
fun removeItemFromMyList(index: Int) {
if(index >= 0 && index < myList.size) {
myList.removeAt(index)
}
}
fun clearAllitemsInMyList(){
myList.clear()
}
我尝试重现这个行为。首先，我发现如果ListView不是活动屏幕（因为ListView没有重新组合），就不会引发此异常。另外，在查看堆栈跟踪后，我的假设是这个问题与内部的Jetpack Compose库或我实现的可组合函数（即Lazycolumn）有关。