ExtendedFloatingActionButton

Composable Component

Extended FABs help people take primary actions. They're wider than FABs to accommodate a text label and larger target area.

Common

@Composable
fun ExtendedFloatingActionButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    shape: Shape = FloatingActionButtonDefaults.extendedFabShape,
    containerColor: Color = FloatingActionButtonDefaults.containerColor,
    contentColor: Color = contentColorFor(containerColor),
    elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation(),
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
)

Parameters


onClick	called when this FAB is clicked
modifier	the `Modifier` to be applied to this FAB
shape	defines the shape of this FAB's container and shadow (when using `elevation`)
containerColor	the color used for the background of this FAB. Use `Color.Transparent` to have no color.
contentColor	the preferred color for content inside this FAB. Defaults to either the matching content color for `containerColor`, or to the current `LocalContentColor` if `containerColor` is not a color from the theme.
elevation	`FloatingActionButtonElevation` used to resolve the elevation for this FAB in different states. This controls the size of the shadow below the FAB. Additionally, when the container color is `ColorScheme.surface`, this controls the amount of primary color applied as an overlay. See also: `Surface`.
interactionSource	an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this FAB. You can use this to change the FAB's appearance or preview the FAB in different states. Note that if `null` is provided, interactions will still happen internally.
content	the content of this FAB, typically a `Text` label

Common

@Composable
fun ExtendedFloatingActionButton(
    text: @Composable () -> Unit,
    icon: @Composable () -> Unit,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    expanded: Boolean = true,
    shape: Shape = FloatingActionButtonDefaults.extendedFabShape,
    containerColor: Color = FloatingActionButtonDefaults.containerColor,
    contentColor: Color = contentColorFor(containerColor),
    elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation(),
    interactionSource: MutableInteractionSource? = null,
)

Parameters


text	label displayed inside this FAB
icon	icon for this FAB, typically an `Icon`
onClick	called when this FAB is clicked
modifier	the `Modifier` to be applied to this FAB
expanded	controls the expansion state of this FAB. In an expanded state, the FAB will show both the `icon` and `text`. In a collapsed state, the FAB will show only the `icon`.
shape	defines the shape of this FAB's container and shadow (when using `elevation`)
containerColor	the color used for the background of this FAB. Use `Color.Transparent` to have no color.
contentColor	the preferred color for content inside this FAB. Defaults to either the matching content color for `containerColor`, or to the current `LocalContentColor` if `containerColor` is not a color from the theme.
elevation	`FloatingActionButtonElevation` used to resolve the elevation for this FAB in different states. This controls the size of the shadow below the FAB. Additionally, when the container color is `ColorScheme.surface`, this controls the amount of primary color applied as an overlay. See also: `Surface`.
interactionSource	an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this FAB. You can use this to change the FAB's appearance or preview the FAB in different states. Note that if `null` is provided, interactions will still happen internally.

Code Examples

ExtendedFloatingActionButtonTextSample

@Preview
@Composable
fun ExtendedFloatingActionButtonTextSample() {
    ExtendedFloatingActionButton(onClick = { /* do something */ }) { Text(text = "Extended FAB") }
}

ExtendedFloatingActionButtonSample

@Preview
@Composable
fun ExtendedFloatingActionButtonSample() {
    ExtendedFloatingActionButton(
        onClick = { /* do something */ },
        icon = { Icon(Icons.Filled.Add, "Localized description") },
        text = { Text(text = "Extended FAB") },
    )
}

AnimatedExtendedFloatingActionButtonSample

@Preview
@Composable
fun AnimatedExtendedFloatingActionButtonSample() {
    val listState = rememberLazyListState()
    // The FAB is initially expanded. Once the first visible item is past the first item we
    // collapse the FAB. We use a remembered derived state to minimize unnecessary compositions.
    val expandedFab by remember { derivedStateOf { listState.firstVisibleItemIndex == 0 } }
    Scaffold(
        floatingActionButton = {
            ExtendedFloatingActionButton(
                onClick = { /* do something */ },
                expanded = expandedFab,
                icon = { Icon(Icons.Filled.Add, "Localized Description") },
                text = { Text(text = "Extended FAB") },
            )
        },
        floatingActionButtonPosition = FabPosition.End,
    ) {
        LazyColumn(state = listState, modifier = Modifier.fillMaxSize()) {
            for (index in 0 until 100) {
                item { Text(text = "List item - $index", modifier = Modifier.padding(24.dp)) }
            }
        }
    }
}

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