Kotlin实时显示当前时间

@Composable
fun ShowLocalTime() {
    var nowTime by remember {
        mutableStateOf(" ")
    }
    Thread {
            Thread.sleep(1000)
            nowTime = LocalDateTime.now().toString()
    }.start()
    Text(text = nowTime)
}

 nowTime变量每次被线程更新的时候， Text控件属性也会随之更新.