Jetpack Compose collapsing toolbar

Issue

I can’t find any doc on the matter, is there something similar to a CollapsingToolbar in Compose?

All I found was a mention of it here, but nothing on how to set it up

Solution

I found a solution created by Samir Basnet (from Kotlin Slack Channel) which was useful for me, I hope it helps someone else…

@Composable
fun CollapsingEffectScreen() {
    val items = (1..100).map { "Item $it" }
    val lazyListState = rememberLazyListState()
    var scrolledY = 0f
    var previousOffset = 0
    LazyColumn(
        Modifier.fillMaxSize(),
        lazyListState,
    ) {
        item {
            Image(
                painter = painterResource(id = R.drawable.recife),
                contentDescription = null,
                contentScale = ContentScale.FillWidth,
                modifier = Modifier
                    .graphicsLayer {
                        scrolledY += lazyListState.firstVisibleItemScrollOffset - previousOffset
                        translationY = scrolledY * 0.5f
                        previousOffset = lazyListState.firstVisibleItemScrollOffset
                    }
                    .height(240.dp)
                    .fillMaxWidth()
            )
        }
        items(items) {
            Text(
                text = it,
                Modifier
                    .background(Color.White)
                    .fillMaxWidth()
                    .padding(8.dp)
            )
        }
    }
}

Here is the result:

enter image description here

Answered By – nglauber

This Answer collected from stackoverflow, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0

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