Compose TextClock

ClockText.kt

@Composable
fun ClockText() {
    val currentTimeMillis = remember {
        mutableStateOf(System.currentTimeMillis())
    }

    LaunchedEffect(key1 = currentTimeMillis) {
        while (true) {
            delay(250)
            currentTimeMillis.value = System.currentTimeMillis()
        }
    }

    Box() {
        Text(
            text = DateUtils.formatDateTime(LocalContext.current, currentTimeMillis.value, DateUtils.FORMAT_SHOW_TIME),
            modifier = Modifier.padding(8.dp, 8.dp),
            color = MaterialTheme.colors.onBackground,
            style = MaterialTheme.typography.subtitle2
        )
    }
}