Button

Component in Material 3 Compose

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

Last updated: 2024-10-22 13:47

Installation

dependencies {
   implementation("androidx.compose.material3:material3:1.4.0-alpha02")
}

Overloads

@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

name	description
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.

Code Examples

ButtonSample

@Preview
@Composable
fun ButtonSample() {
    Button(onClick = { /* Do something! */ }) { Text("Button") }
}

ButtonWithIconSample

@Preview
@Composable
fun ButtonWithIconSample() {
    Button(
        onClick = { /* Do something! */ },
        contentPadding = ButtonDefaults.ButtonWithIconContentPadding
    ) {
        Icon(
            Icons.Filled.Favorite,
            contentDescription = "Localized description",
            modifier = Modifier.size(ButtonDefaults.IconSize)
        )
        Spacer(Modifier.size(ButtonDefaults.IconSpacing))
        Text("Like")
    }
}

SquareButtonSample

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

SmallButtonSample

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