Button - Composable Component in Material 3 Compose

Composable Component

Buttons help people initiate actions, from sending an email, to sharing a document, to liking a post.

Common

@Composable
fun Button(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    shape: Shape = ButtonDefaults.shape,
    colors: ButtonColors = ButtonDefaults.buttonColors(),
    elevation: ButtonElevation? = ButtonDefaults.buttonElevation(),
    border: BorderStroke? = null,
    contentPadding: PaddingValues = ButtonDefaults.ContentPadding,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
)

Parameters


onClick	called when this button is clicked
modifier	the `Modifier` to be applied to this button
enabled	controls the enabled state of this button. When `false`, this component will not respond to user input, and it will appear visually disabled and disabled to accessibility services.
shape	defines the shape of this button's container, border (when `border` is not null), and shadow (when using `elevation`)
colors	`ButtonColors` that will be used to resolve the colors for this button in different states. See `ButtonDefaults.buttonColors`.
elevation	`ButtonElevation` used to resolve the elevation for this button in different states. This controls the size of the shadow below the button. See `ButtonElevation.shadowElevation`.
border	the border to draw around the container of this button
contentPadding	the spacing values to apply internally between the container and the content
interactionSource	an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this button. You can use this to change the button's appearance or preview the button in different states. Note that if `null` is provided, interactions will still happen internally.
content	The content displayed on the button, expected to be text, icon or image.

Common

@Composable
@ExperimentalMaterial3ExpressiveApi
fun Button(
    onClick: () -> Unit,
    shapes: ButtonShapes,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    colors: ButtonColors = ButtonDefaults.buttonColors(),
    elevation: ButtonElevation? = ButtonDefaults.buttonElevation(),
    border: BorderStroke? = null,
    contentPadding: PaddingValues = ButtonDefaults.contentPaddingFor(ButtonDefaults.MinHeight),
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
)

Parameters


onClick	called when this button is clicked
shapes	the `ButtonShapes` that this button with morph between depending on the user's interaction with the button.
modifier	the `Modifier` to be applied to this button
enabled	controls the enabled state of this button. When `false`, this component will not respond to user input, and it will appear visually disabled and disabled to accessibility services.
colors	`ButtonColors` that will be used to resolve the colors for this button in different states. See `ButtonDefaults.buttonColors`.
elevation	`ButtonElevation` used to resolve the elevation for this button in different states. This controls the size of the shadow below the button. See `ButtonElevation.shadowElevation`.
border	the border to draw around the container of this button
contentPadding	the spacing values to apply internally between the container and the content
interactionSource	an optional hoisted `MutableInteractionSource` for observing and emitting `Interaction`s for this button. You can use this to change the button's appearance or preview the button in different states. Note that if `null` is provided, interactions will still happen internally.
content	The content displayed on the button, expected to be text, icon or image.

Code Examples

ButtonSample

@Preview
@Composable
fun ButtonSample() {
    Button(onClick = {}) { Text("Button") }
}

ButtonWithAnimatedShapeSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun ButtonWithAnimatedShapeSample() {
    Button(onClick = {}, shapes = ButtonDefaults.shapes()) { Text("Button") }
}

ButtonWithIconSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun ButtonWithIconSample() {
    Button(
        onClick = { /* Do something! */ },
        contentPadding =
            ButtonDefaults.contentPaddingFor(ButtonDefaults.MinHeight, hasStartIcon = true),
    ) {
        Icon(
            Icons.Filled.Favorite,
            contentDescription = "Localized description",
            modifier = Modifier.size(ButtonDefaults.iconSizeFor(ButtonDefaults.MinHeight)),
        )
        Spacer(Modifier.size(ButtonDefaults.iconSpacingFor(ButtonDefaults.MinHeight)))
        Text("Like")
    }
}

LargeButtonWithIconSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun LargeButtonWithIconSample() {
    val size = ButtonDefaults.LargeContainerHeight
    Button(
        onClick = { /* Do something! */ },
        modifier = Modifier.heightIn(size),
        contentPadding = ButtonDefaults.contentPaddingFor(size, hasStartIcon = true),
    ) {
        Icon(
            Icons.Filled.Edit,
            contentDescription = "Localized description",
            modifier = Modifier.size(ButtonDefaults.iconSizeFor(size)),
        )
        Spacer(Modifier.size(ButtonDefaults.iconSpacingFor(size)))
        Text("Label", style = ButtonDefaults.textStyleFor(size))
    }
}

MediumButtonWithIconSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun MediumButtonWithIconSample() {
    val size = ButtonDefaults.MediumContainerHeight
    Button(
        onClick = { /* Do something! */ },
        modifier = Modifier.heightIn(size),
        contentPadding = ButtonDefaults.contentPaddingFor(size, hasStartIcon = true),
    ) {
        Icon(
            Icons.Filled.Edit,
            contentDescription = "Localized description",
            modifier = Modifier.size(ButtonDefaults.iconSizeFor(size)),
        )
        Spacer(Modifier.size(ButtonDefaults.iconSpacingFor(size)))
        Text("Label", style = ButtonDefaults.textStyleFor(size))
    }
}

SmallButtonSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun SmallButtonSample() {
    Button(onClick = { /* Do something! */ }, contentPadding = ButtonDefaults.SmallContentPadding) {
        Text("Button")
    }
}

SquareButtonSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun SquareButtonSample() {
    Button(onClick = { /* Do something! */ }, shape = ButtonDefaults.squareShape) { Text("Button") }
}

XLargeButtonWithIconSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun XLargeButtonWithIconSample() {
    val size = ButtonDefaults.ExtraLargeContainerHeight
    Button(
        onClick = { /* Do something! */ },
        modifier = Modifier.heightIn(size),
        contentPadding = ButtonDefaults.contentPaddingFor(size, hasStartIcon = true),
    ) {
        Icon(
            Icons.Filled.Edit,
            contentDescription = "Localized description",
            modifier = Modifier.size(ButtonDefaults.iconSizeFor(size)),
        )
        Spacer(Modifier.size(ButtonDefaults.iconSpacingFor(size)))
        Text("Label", style = ButtonDefaults.textStyleFor(size))
    }
}

XSmallButtonWithIconSample

@OptIn(ExperimentalMaterial3ExpressiveApi::class)
@Preview
@Composable
fun XSmallButtonWithIconSample() {
    val size = ButtonDefaults.ExtraSmallContainerHeight
    Button(
        onClick = { /* Do something! */ },
        modifier = Modifier.heightIn(size),
        contentPadding = ButtonDefaults.contentPaddingFor(size, hasStartIcon = true),
    ) {
        Icon(
            Icons.Filled.Edit,
            contentDescription = "Localized description",
            modifier = Modifier.size(ButtonDefaults.iconSizeFor(size)),
        )
        Spacer(Modifier.size(ButtonDefaults.iconSpacingFor(size)))
        Text("Label")
    }
}

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