I can't find any documents 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
Jetpack Compose implementation of Material Design 3 includes 4 types of Top App Bars (https://m3.material.io/components/top-app-bar/implementation):
CenterAlignedTopAppBar
SmallTopAppBar
MediumTopAppBar
LargeTopAppBar
https://developer.android.com/reference/kotlin/androidx/compose/material3/package-summary
They all have a scrollBehavior
parameter, which can be used for collapsing the toolbar. There are 3 basic types of scroll behavior in the library:
TopAppBarDefaults.pinnedScrollBehavior
TopAppBarDefaults.enterAlwaysScrollBehavior
TopAppBarDefaults.exitUntilCollapsedScrollBehavior
https://developer.android.com/reference/kotlin/androidx/compose/material3/TopAppBarDefaults
Note: This API is annotated as experimental at the moment.
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun Test() {
val scrollBehavior = TopAppBarDefaults.enterAlwaysScrollBehavior(rememberTopAppBarState())
Scaffold(
modifier = Modifier.nestedScroll(scrollBehavior.nestedScrollConnection),
topBar = {
MediumTopAppBar(
title = { Text(text = "Scroll Behavior Test") },
navigationIcon = {
IconButton(onClick = { /*TODO*/ }) {
Icon(imageVector = Icons.Default.Menu, contentDescription = "")
}
},
scrollBehavior = scrollBehavior
)
}
) {
LazyColumn(modifier = Modifier.fillMaxWidth()) {
items((1..50).toList()) { item ->
Text(modifier = Modifier.padding(8.dp), text = "Item $item")
}
}
}
}