我有一个recyclerView，希望在用户滚动时设置文本并更改TextView的可见性。在用户停止滚动后，视图应该显示一秒钟，然后停止。为此，我有一个RecyclerView.onScrollListener。我的代码如下所示：

var scrollJob = Job()
var tempText = ""

recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
    override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
        super.onScrolled(recyclerView, dx, dy)
        if (dx != 0 || dy != 0) {
            val someText = // compute text from ViewHolder
            scrollTextView.visibility = View.VISIBLE
            if (someText != tempText) {
                scrollTextView.text = someText
                tempText = someText
            }
        }
    }

    override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
        super.onScrollStateChanged(recyclerView, newState)
        when (newState) {
            RecyclerView.SCROLL_STATE_SETTLING -> Log.d("TAG", "state: settling")
            RecyclerView.SCROLL_STATE_IDLE -> {
                scrollJob.cancel()
                scrollJob = lifecycleScope.launch {
                    delay(1000)
                    scrollTextView.visibility = View.GONE
                }
            }
            RecyclerView.SCROLL_STATE_DRAGGING -> scrollJob.cancel()
        }
    }
}

代码运行得很好，我只是在想，如果我不应该在onscrold中做那么多事情，因为旧的手机可能会有这样的问题。scroll_state_dragging的问题是，即使不需要也会调用它。