那些遇到过的问题

Jetpack 撰写 LazyVerticalGrid 项目抛出 java.lang.IllegalStateException

Ann*_*non 7 android android-jetpack-compose

将内部存储中的所有图像放入LazyVerticalGrid. 到目前为止，它运行良好，没有任何问题，但最近出现了这个问题，没有任何明显的提示。

这是我的用户界面和实用程序代码

fun getAllImagesFromStorage(context: Context): List<ImageMetaData> {
    val imageList = mutableListOf<ImageMetaData>()
    val collection = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL)
    } else {
        MediaStore.Images.Media.EXTERNAL_CONTENT_URI
    }
    val projection = arrayOf(
        MediaStore.Images.Media._ID,
        MediaStore.Images.Media.DISPLAY_NAME,
        MediaStore.Images.Media.SIZE
    )
    val sortOrder = MediaStore.MediaColumns.DATE_ADDED + " DESC"

    val cursor = context.contentResolver
        .query(collection, projection, null, null, sortOrder)

    cursor?.use { cursor ->
        val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID)
        val nameColumn = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME)

        while (cursor.moveToNext()) {
            val id = cursor.getLong(idColumn)
            val name = cursor.getString(nameColumn)

            val contentUri: Uri = ContentUris.withAppendedId(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                id
            )
            imageList += ImageMetaData(
                id = id,
                name = name,
                uri = contentUri
            )
        }
    }
    return imageList
}

@Composable
fun GalleryUi() {
    val imageList by remember { mutableStateOf<List<ImageMetaData>?>(getAllImagesFromStorage(context)) }
    Column(
        modifier = Modifier.fillMaxSize(),
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        Box(modifier = Modifier.weight(1f)) {
            Image(
                modifier = Modifier.fillMaxSize(),
                painter = rememberImagePainter(data = uri),
                contentDescription = null,
                contentScale = contentScale
            )
        }

        ImageGridView(
            modifier = Modifier.weight(1f),
            context = context,
            images = imageList,
            onImageSelected = { imageMetaData ->
                onImageSelected(imageMetaData.uri)
            }
        )
    }
}

@ExperimentalFoundationApi
@Composable
private fun ImageGridView(
    modifier: Modifier = Modifier,
    context: Context,
    images: List<ImageMetaData>,
    onImageSelected: (ImageMetaData) -> Unit
) {
    LazyVerticalGrid(
        modifier = modifier,
        cells = GridCells.Fixed(4)
    ) {
        items(images) { image ->
            // Using remember{ } value for bitmap can cause lagging while scrolling images
            var bitmap: Bitmap? = null
            try {
                bitmap = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                    context.contentResolver.loadThumbnail(image.uri, Size(640, 480), null)
                } else {
                    MediaStore.Images.Thumbnails.getThumbnail(
                        context.contentResolver,
                        image.id,
                        MediaStore.Images.Thumbnails.MINI_KIND,
                        null
                    )
                }
            } catch (e: IOException) {
            }

            bitmap?.let {
                Image(
                    modifier = Modifier
                        .fillMaxWidth()
                        .aspectRatio(1f)
                        .border(1.dp, Color.White)
                        .clickable { onImageSelected(image) },
                    bitmap = it.asImageBitmap(),
                    contentDescription = null,
                    contentScale = ContentScale.Crop
                )
            }
        }
    }
}
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这是我得到的例外

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.rajesh.client, PID: 14047
    java.lang.IllegalStateException: Check failed.
        at androidx.compose.foundation.lazy.LazyGridKt$ItemRow$2.measure-3p2s80s(LazyGrid.kt:451)
        at androidx.compose.ui.node.InnerPlaceable.measure-BRTryo0(InnerPlaceable.kt:55)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:99)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:98)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeMeasureSnapshotReads$ui_release(OwnerSnapshotObserver.kt:76)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.remeasure-BRTryo0(OuterMeasurablePlaceable.kt:98)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.measure-BRTryo0(OuterMeasurablePlaceable.kt:75)
        at androidx.compose.ui.node.LayoutNode.measure-BRTryo0(LayoutNode.kt:1308)
        at androidx.compose.foundation.lazy.layout.LazyLayoutPlaceablesProvider.getAndMeasure-0kLqBqw(LazyMeasurePolicy.kt:61)
        at androidx.compose.foundation.lazy.list.LazyMeasuredItemProvider.getAndMeasure-oA9-DU0(LazyMeasuredItemProvider.kt:45)
        at androidx.compose.foundation.lazy.list.LazyListMeasureKt.measureLazyList-wroFCeY(LazyListMeasure.kt:145)
        at androidx.compose.foundation.lazy.list.LazyListKt$rememberLazyListMeasurePolicy$1$1.measure-3p2s80s(LazyList.kt:259)
        at androidx.compose.foundation.lazy.layout.LazyLayoutKt$LazyLayout$2.invoke-0kLqBqw(LazyLayout.kt:55)
        at androidx.compose.foundation.lazy.layout.LazyLayoutKt$LazyLayout$2.invoke(LazyLayout.kt:44)
        at androidx.compose.ui.layout.SubcomposeLayoutState$createMeasurePolicy$1.measure-3p2s80s(SubcomposeLayout.kt:355)
        at androidx.compose.ui.node.InnerPlaceable.measure-BRTryo0(InnerPlaceable.kt:55)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.graphics.SimpleGraphicsLayerModifier.measure-3p2s80s(GraphicsLayerModifier.kt:306)
        at androidx.compose.ui.node.ModifiedLayoutNode.measure-BRTryo0(ModifiedLayoutNode.kt:39)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.measure-BRTryo0(DelegatingLayoutNodeWrapper.kt:131)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:99)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:98)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeMeasureSnapshotReads$ui_release(OwnerSnapshotObserver.kt:76)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.remeasure-BRTryo0(OuterMeasurablePlaceable.kt:98)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.measure-BRTryo0(OuterMeasurablePlaceable.kt:75)
        at androidx.compose.ui.node.LayoutNode.measure-BRTryo0(LayoutNode.kt:1308)
        at androidx.compose.foundation.layout.RowColumnImplKt$rowColumnMeasurePolicy$1.measure-3p2s80s(RowColumnImpl.kt:147)
E/AndroidRuntime:     at androidx.compose.ui.node.InnerPlaceable.measure-BRTryo0(InnerPlaceable.kt:55)
        at androidx.compose.foundation.layout.FillModifier.measure-3p2s80s(Size.kt:658)
        at androidx.compose.ui.node.ModifiedLayoutNode.measure-BRTryo0(ModifiedLayoutNode.kt:39)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:99)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$remeasure$2.invoke(OuterMeasurablePlaceable.kt:98)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeMeasureSnapshotReads$ui_release(OwnerSnapshotObserver.kt:76)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.remeasure-BRTryo0(OuterMeasurablePlaceable.kt:98)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.measure-BRTryo0(OuterMeasurablePlaceable.kt:75)
        at androidx.compose.ui.node.LayoutNode.measure-BRTryo0(LayoutNode.kt:1308)
        at androidx.compose.material.ScaffoldKt$ScaffoldLayout$1$1$1.invoke(Scaffold.kt:317)
        at androidx.compose.material.ScaffoldKt$ScaffoldLayout$1$1$1.invoke(Scaffold.kt:241)
        at androidx.compose.ui.layout.MeasureScope$layout$1.placeChildren(MeasureScope.kt:68)
        at androidx.compose.ui.layout.SubcomposeLayoutState$createMeasurePolicy$1$measure$1.placeChildren(SubcomposeLayout.kt:367)
        at androidx.compose.ui.node.LayoutNode$layoutChildren$1.invoke(LayoutNode.kt:993)
        at androidx.compose.ui.node.LayoutNode$layoutChildren$1.invoke(LayoutNode.kt:978)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeLayoutSnapshotReads$ui_release(OwnerSnapshotObserver.kt:62)
        at androidx.compose.ui.node.LayoutNode.layoutChildren$ui_release(LayoutNode.kt:978)
        at androidx.compose.ui.node.LayoutNode.onNodePlaced$ui_release(LayoutNode.kt:964)
        at androidx.compose.ui.node.InnerPlaceable.placeAt-f8xVGno(InnerPlaceable.kt:129)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.placeOuterWrapper-f8xVGno(OuterMeasurablePlaceable.kt:170)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.access$placeOuterWrapper-f8xVGno(OuterMeasurablePlaceable.kt:28)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$placeAt$1.invoke(OuterMeasurablePlaceable.kt:158)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$placeAt$1.invoke(OuterMeasurablePlaceable.kt:157)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeLayoutModifierSnapshotReads$ui_release(OwnerSnapshotObserver.kt:69)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.placeAt-f8xVGno(OuterMeasurablePlaceable.kt:157)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50$default(Placeable.kt:203)
        at androidx.compose.foundation.layout.BoxKt.placeInBox(Box.kt:186)
        at androidx.compose.foundation.layout.BoxKt.access$placeInBox(Box.kt:1)
        at androidx.compose.foundation.layout.BoxKt$boxMeasurePolicy$1$measure$2.invoke(Box.kt:126)
        at androidx.compose.foundation.layout.BoxKt$boxMeasurePolicy$1$measure$2.invoke(Box.kt:125)
        at androidx.compose.ui.layout.MeasureScope$layout$1.placeChildren(MeasureScope.kt:68)
        at androidx.compose.ui.node.LayoutNode$layoutChildren$1.invoke(LayoutNode.kt:993)
E/AndroidRuntime:     at androidx.compose.ui.node.LayoutNode$layoutChildren$1.invoke(LayoutNode.kt:978)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeLayoutSnapshotReads$ui_release(OwnerSnapshotObserver.kt:62)
        at androidx.compose.ui.node.LayoutNode.layoutChildren$ui_release(LayoutNode.kt:978)
        at androidx.compose.ui.node.LayoutNode.onNodePlaced$ui_release(LayoutNode.kt:964)
        at androidx.compose.ui.node.InnerPlaceable.placeAt-f8xVGno(InnerPlaceable.kt:129)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50$default(Placeable.kt:203)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper$measure$1$1.placeChildren(DelegatingLayoutNodeWrapper.kt:138)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.placeAt-f8xVGno(DelegatingLayoutNodeWrapper.kt:126)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50$default(Placeable.kt:203)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper$measure$1$1.placeChildren(DelegatingLayoutNodeWrapper.kt:138)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.placeAt-f8xVGno(DelegatingLayoutNodeWrapper.kt:126)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.placeWithLayer(Placeable.kt:393)
        at androidx.compose.ui.layout.Placeable$PlacementScope.placeWithLayer$default(Placeable.kt:266)
        at androidx.compose.ui.graphics.SimpleGraphicsLayerModifier$measure$1.invoke(GraphicsLayerModifier.kt:308)
        at androidx.compose.ui.graphics.SimpleGraphicsLayerModifier$measure$1.invoke(GraphicsLayerModifier.kt:307)
        at androidx.compose.ui.layout.MeasureScope$layout$1.placeChildren(MeasureScope.kt:68)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.placeAt-f8xVGno(DelegatingLayoutNodeWrapper.kt:126)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.placeOuterWrapper-f8xVGno(OuterMeasurablePlaceable.kt:170)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.access$placeOuterWrapper-f8xVGno(OuterMeasurablePlaceable.kt:28)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$placeAt$1.invoke(OuterMeasurablePlaceable.kt:158)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$placeAt$1.invoke(OuterMeasurablePlaceable.kt:157)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeLayoutModifierSnapshotReads$ui_release(OwnerSnapshotObserver.kt:69)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.placeAt-f8xVGno(OuterMeasurablePlaceable.kt:157)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50$default(Placeable.kt:203)
        at androidx.compose.foundation.layout.BoxKt.placeInBox(Box.kt:186)
        at androidx.compose.foundation.layout.BoxKt.access$placeInBox(Box.kt:1)
        at androidx.compose.foundation.layout.BoxKt$boxMeasurePolicy$1$measure$2.invoke(Box.kt:126)
        at androidx.compose.foundation.layout.BoxKt$boxMeasurePolicy$1$measure$2.invoke(Box.kt:125)
E/AndroidRuntime:     at androidx.compose.ui.layout.MeasureScope$layout$1.placeChildren(MeasureScope.kt:68)
        at androidx.compose.ui.node.LayoutNode$layoutChildren$1.invoke(LayoutNode.kt:993)
        at androidx.compose.ui.node.LayoutNode$layoutChildren$1.invoke(LayoutNode.kt:978)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeLayoutSnapshotReads$ui_release(OwnerSnapshotObserver.kt:62)
        at androidx.compose.ui.node.LayoutNode.layoutChildren$ui_release(LayoutNode.kt:978)
        at androidx.compose.ui.node.LayoutNode.onNodePlaced$ui_release(LayoutNode.kt:964)
        at androidx.compose.ui.node.InnerPlaceable.placeAt-f8xVGno(InnerPlaceable.kt:129)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.placeWithLayer(Placeable.kt:393)
        at androidx.compose.ui.layout.Placeable$PlacementScope.placeWithLayer$default(Placeable.kt:266)
        at androidx.compose.ui.graphics.BlockGraphicsLayerModifier$measure$1.invoke(GraphicsLayerModifier.kt:249)
        at androidx.compose.ui.graphics.BlockGraphicsLayerModifier$measure$1.invoke(GraphicsLayerModifier.kt:248)
        at androidx.compose.ui.layout.MeasureScope$layout$1.placeChildren(MeasureScope.kt:68)
        at androidx.compose.ui.node.DelegatingLayoutNodeWrapper.placeAt-f8xVGno(DelegatingLayoutNodeWrapper.kt:126)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.placeOuterWrapper-f8xVGno(OuterMeasurablePlaceable.kt:170)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.access$placeOuterWrapper-f8xVGno(OuterMeasurablePlaceable.kt:28)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$placeAt$1.invoke(OuterMeasurablePlaceable.kt:158)
        at androidx.compose.ui.node.OuterMeasurablePlaceable$placeAt$1.invoke(OuterMeasurablePlaceable.kt:157)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:126)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:88)
        at androidx.compose.ui.node.OwnerSnapshotObserver.observeLayoutModifierSnapshotReads$ui_release(OwnerSnapshotObserver.kt:69)
        at androidx.compose.ui.node.OuterMeasurablePlaceable.placeAt-f8xVGno(OuterMeasurablePlaceable.kt:157)
        at androidx.compose.ui.layout.Placeable.access$placeAt-f8xVGno(Placeable.kt:31)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50(Placeable.kt:370)
        at androidx.compose.ui.layout.Placeable$PlacementScope.place-70tqf50$default(Placeable.kt:203)
        at androidx.compose.foundation.layout.BoxKt.placeInBox(Box.kt:186)
        at androidx.compose.foundation.layout.BoxKt.access$placeInBox(Box.kt:1)
        at androidx.compose.foundation.layout.BoxKt$boxMeasurePolicy$1$measure$5.invoke(Box.kt:167)
        at android

v.d*_*v.d 0

就我而言，我正在检查空值，如果值为空则返回。而 LazyVerticalGrid 使用子可组合项来计算宽度，并且我在任何测量之前返回，这会导致发生异常。

像这样的东西

@Composable
fun SimpleGridChild(title: String?) {
    if (title == null) return
    Text(text = title)
}
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