animateColorAsState

ColorAnimationSample

@Composable
fun ColorAnimationSample() {
    @Composable
    fun ColorAnimation(primary: Boolean) {
        // Animates to primary or secondary color, depending on whether [primary] is true
        // [animateState] returns the current animation value in a State<Color> in this example. We
        // use the State<Color> object as a property delegate here.
        val color: Color by
            animateColorAsState(
                if (primary) MaterialTheme.colors.primary else MaterialTheme.colors.secondary
            )
        Box(modifier = Modifier.background(color))
    }
}