如何处理刷新时的SwipeRefreshLayout？

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipe_refresh_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout

class MainActivity : AppCompatActivity() {

    private lateinit var swipeRefreshLayout: SwipeRefreshLayout
    private lateinit var recyclerView: RecyclerView
    private lateinit var adapter: MyAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        swipeRefreshLayout = findViewById(R.id.swipe_refresh_layout)
        recyclerView = findViewById(R.id.recycler_view)

        // 设置RecyclerView的布局管理器和适配器
        recyclerView.layoutManager = LinearLayoutManager(this)
        adapter = MyAdapter()
        recyclerView.adapter = adapter

        // 设置SwipeRefreshLayout的刷新监听器
        swipeRefreshLayout.setOnRefreshListener {
            // 执行刷新操作
            refreshData()
        }
    }

    private fun refreshData() {
        // 模拟数据刷新操作
        // 你可以在这里进行网络请求或其他耗时操作
        // 这里使用Handler模拟一个延迟操作
        Handler().postDelayed({
            // 更新数据
            adapter.updateData(getNewData())

            // 停止刷新动画
            swipeRefreshLayout.isRefreshing = false
        }, 2000) // 2秒延迟
    }

    private fun getNewData(): List<String> {
        // 返回新的数据
        return listOf("Item 1", "Item 2", "Item 3", "Item 4", "Item 5")
    }
}

private fun refreshData() {
    // 模拟数据刷新操作
    // 你可以在这里进行网络请求或其他耗时操作
    // 这里使用Handler模拟一个延迟操作
    Handler().postDelayed({
        // 更新数据
        adapter.updateData(getNewData())

        // 停止刷新动画
        swipeRefreshLayout.isRefreshing = false
    }, 2000) // 2秒延迟
}

class MyAdapter : RecyclerView.Adapter<MyAdapter.ViewHolder>() {

    private var data: List<String> = listOf()

    fun updateData(newData: List<String>) {
        data = newData
        notifyDataSetChanged()
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_view, parent, false)
        return ViewHolder(view)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(data[position])
    }

    override fun getItemCount(): Int {
        return data.size
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        fun bind(item: String) {
            // 绑定数据到视图
        }
    }
}