CardDefaults

@Composable
fun cardBackgroundPainter(
    startBackgroundColor: Color = MaterialTheme.colors.primary
                .copy(alpha = 0.30f)
                .compositeOver(MaterialTheme.colors.background),
    endBackgroundColor: Color = MaterialTheme.colors.onSurfaceVariant
                .copy(alpha = 0.20f)
                .compositeOver(MaterialTheme.colors.background),
    gradientDirection: LayoutDirection = LocalLayoutDirection.current
): Painter

Creates a Painter for background colors for a Card. Cards typically have a linear gradient for a background. The gradient will be between startBackgroundColor and endBackgroundColor and at an angle of 45 degrees.

Cards should have a content color that contrasts with the background gradient.

@Composable
fun imageWithScrimBackgroundPainter(
    backgroundImagePainter: Painter,
    backgroundImageScrimBrush: Brush = Brush.linearGradient(
                colors =
                    listOf(
                        MaterialTheme.colors.surface.copy(alpha = 1.0f),
                        MaterialTheme.colors.surface.copy(alpha = 0f)
                    )
            )
): Painter

Creates a Painter for the background of a Card that displays an Image with a scrim over the image to make sure that any content above the background will be legible.

An Image background is a means to reinforce the meaning of information in a Card, e.g. To help to contextualize the information in a TitleCard

Cards should have a content color that contrasts with the background image and scrim

val AppImageSize: Dp

The default size of the app icon/image when used inside a AppCard.

val ContentPadding: PaddingValues

The default content padding used by Card