Android Kotlin RecyclerView 自动循环滚动：触摸停止，松开继续

要实现RecyclerView的自动循环滚动，并且能够通过触摸点击停止滚动、松开后继续滚动，可以按照以下步骤进行：

1. 创建一个自定义的RecyclerView滚动监听器，继承自RecyclerView.OnScrollListener：

class AutoScrollListener(private val recyclerView: RecyclerView) : RecyclerView.OnScrollListener() {

    private var scrolling = false

    override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
        super.onScrollStateChanged(recyclerView, newState)
        scrolling = newState == RecyclerView.SCROLL_STATE_DRAGGING
    }

    override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
        super.onScrolled(recyclerView, dx, dy)
        if (!scrolling) {
            recyclerView.smoothScrollBy(30, 0)
        }
    }
}

2. 在你的Activity或Fragment中，设置RecyclerView的布局管理器和适配器，并添加自定义的滚动监听器：

val recyclerView: RecyclerView = findViewById(R.id.recyclerView)
val layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false)
val adapter = YourAdapter()

recyclerView.layoutManager = layoutManager
recyclerView.adapter = adapter

val autoScrollListener = AutoScrollListener(recyclerView)
recyclerView.addOnScrollListener(autoScrollListener)

3. 然后，你需要添加触摸事件监听器来控制滚动的开始和停止。你可以在RecyclerView的触摸事件监听器中实现这一点：

recyclerView.setOnTouchListener { v, event ->
    when (event.action) {
        MotionEvent.ACTION_DOWN -> {
            autoScrollListener.scrolling = false // 停止自动滚动
        }
        MotionEvent.ACTION_UP -> {
            autoScrollListener.scrolling = true // 继续自动滚动
        }
    }
    false
}

这样，当你触摸RecyclerView时，自动滚动会停止，松开后会继续自动滚动。