Android Compose Animation and Testing — part 2

Animation in Compose

Animations are essential in a modern mobile app in order to realize a smooth and understandable user experience. https://developer.android.com/develop/ui/compose/animation/introduction

• https://goo.gle/compose-animation-cheatsheet
• https://goo.gle/animated-content-blog
• https://goo.gle/compose-animation
• Youtube animation https://www.youtube.com/watch?v=0mfCbXrYBPE
• Developer tutorial -> https://developer.android.com/develop/ui/compose/quick-guides/content/video/animation-in-compose?hl=en

Animate appearance and disappearance

The AnimatedVisibility composable allows you to hide or show content easily. [Code sample]

@Preview(showSystemUi = true)
@Composable
fun ExpandableCardWithImage() {
    Card(
        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp),
        modifier = Modifier.padding(16.dp)
    ) {
        var expanded by remember { mutableStateOf(false) }
        Column(Modifier.clickable { expanded = !expanded }) {
            Image(…