'Surface(Modifier = ..., Shape = ..., Color = ..., Color = ..., BorderStroke? = ..., Dp = ..., () -> Unit): Unit' is only available since Kotlin 1.4.30 and cannot be used in Kotlin 1.4

kotlin_version = '1.4.30'
compose_version = '1.0.0-alpha12'

Surface(color = MaterialTheme.colors.background) {
                    Box(modifier = Modifier.size(100.dp).background(Color.Yellow)
                        .pointerInput(Unit) {
                            detectVerticalDragGestures(
                                onDragCancel = { Log.d("AAAA", "onDragCancel") },
                                onDragEnd = { Log.d("AAAA", "onDragEnd") },
                                onVerticalDrag = { change, dragAmount -> Log.d("AAAA", "Drag change: $dragAmount") }
                            )
                        })
                }

onDragEnd

onDragCancel

onVerticalDrag

android:includeFontPadding="false"
android:lineSpacingExtra="0dp"

7.0.0-alpha04

7.0.0-alpha06

This version (1.0.0-alpha12) of the Compose Compiler requires Kotlin version 1.4.30 but you appear to be using Kotlin version 1.4.21 which is not known to be compatible.

classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.21")

kotlinCompilerVersion

ComposeOptions

2021-02-16 16:08:34.866 9683-9698/... E/System: Uncaught exception thrown by finalizer
2021-02-16 16:08:34.909 9683-9698/... E/System: java.lang.IllegalStateException: Warning: Router objects should be explicitly closed when no longer required otherwise you may leak handles.
        at w4.finalize(chromium-TrichromeWebViewGoogle.aab-stable-432415233:4)
        at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:289)
        at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:276)
        at java.lang.Daemons$Daemon.run(Daemons.java:137)
        at java.lang.Thread.run(Thread.java:919)
     Caused by: java.lang.Exception: AutocloseableRouter allocated at:
        at w4.<init>(chromium-TrichromeWebViewGoogle.aab-stable-432415233:4)
        at vu.<init>(chromium-TrichromeWebViewGoogle.aab-stable-432415233:8)
        at org.chromium.content.browser.framehost.RenderFrameHostImpl.<init>(chromium-TrichromeWebViewGoogle.aab-stable-432415233:10)
        at org.chromium.content.browser.framehost.RenderFrameHostImpl.create(chromium-TrichromeWebViewGoogle.aab-stable-432415233:1)
        at J.N.MZAK3_Tx(Native Method)
        ...

@Composable
fun WebViewView(html: String, ...) {
    AndroidView({ context ->
        val webView = WebView(context)
        // configure webview
        webview
    })
}

Slider

ComponentActivity.setContent

someFrameLayout.setContent(Recomposer.current()) {
            CommonMdcTheme {
                SomeComposeView(viewModel)
            }
        }

androidx.compose.ui.platform.setContent

androidx.activity.compose.setContent

scrollState.smoothScrollBy()

smoothScrollBy

Surface

createOutline

Canvas

Composable

posts.map(::PostCard)

D/InputDispatcher: Waiting to send key to Window{1bda786 u0 myapp.MainActivity} because there are unprocessed events that may cause focus to change

itemsIndexed

LazyColumn

java.lang.IndexOutOfBoundsException: index: 0, size: 0

private val factory = InvalidatingPagingSourceFactory { FeedSource(pages.value, api) }

    val items: Flow<PagingData<FeedItem>> = Pager(PagingConfig(20)) {
        factory.invoke()
    }.flow

@Composable
fun FeedScreen(factory: ViewModelProvider.Factory, onItemClick: (Long) -> Unit) {
    val viewModel = viewModel<MainViewModel>(factory = factory)
    val items = viewModel.items.collectAsLazyPagingItems()

    LazyColumn(content = {
        items(items) { item ->
            if (item != null) {
                RealRowItem(item = item, onItemClick = onItemClick)
            } else {
                PlaceholderRowItem()
            }
        }
    })
}

compose-router

navigation-compose

AnimatedFloatModel

@Stable
class FooDragState { 
 val animatedOffsetX = AnimatedFloatModel(initialValue = 0f, clock)
 val animatedOffsetY = AnimatedFloatModel(initialValue = 0f, clock)
 
 (animatedOffsetX, animatedOffsetY).animateTo(1f, animationSpec, onEnd = { /** do something **/ })
}

TextField

Column

Column

TextField

java.lang.RuntimeException: Parcel: unable to marshal value androidx.compose.runtime.SnapshotMutableStateImpl