MaterialThemeButton.kt

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

@Composable
    fun buttonColors(
        backgroundColor: Color = MaterialTheme.colors.primary,
        contentColor: Color = contentColorFor(backgroundColor),
        disabledBackgroundColor: Color = MaterialTheme.colors.onSurface.copy(alpha = 0.12f)
            .compositeOver(MaterialTheme.colors.surface),
        disabledContentColor: Color = MaterialTheme.colors.onSurface
            .copy(alpha = ContentAlpha.disabled)
    ): ButtonColors = DefaultButtonColors(
        backgroundColor = backgroundColor,
        contentColor = contentColor,
        disabledBackgroundColor = disabledBackgroundColor,
        disabledContentColor = disabledContentColor
    )