在Android上，布局的显示和隐藏往往很生硬，给人体验不好，本文使用 android:animateLayoutChanges属性，使得体验效果瞬间提升一个档次。

1、效果如下：

2、具体代码如下：

package com.zw.demo20230928import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.LinearLayout
import android.widget.TextView
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerViewclass MainActivity : AppCompatActivity() {private lateinit var llTitle: LinearLayoutprivate lateinit var recyclerView: RecyclerViewprivate lateinit var tvTitle: TextViewprivate val data =ArrayList<String>()private var isClick =false;override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.activity_main)recyclerView = findViewById(R.id.recyclerView)llTitle = findViewById(R.id.ll_title)tvTitle = findViewById(R.id.tv_title)llTitle.setOnClickListener {isClick = !isClickif (isClick){tvTitle.text = "收起"recyclerView.visibility = View.VISIBLE}else{tvTitle.text = "展开"recyclerView.visibility = View.GONE}}var manager=LinearLayoutManager(this)manager.orientation =LinearLayoutManager.VERTICALrecyclerView.layoutManager =managerrecyclerView.adapter =object :RecyclerView.Adapter<RecyclerView.ViewHolder>() {override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {val v = LayoutInflater.from(recyclerView.context).inflate(R.layout.item_test, parent, false)return object : RecyclerView.ViewHolder(v){}}override fun getItemCount(): Int {return data.size}override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {holder.itemView.findViewById<TextView>(R.id.tv_name).text = data[position]}}initData()}private fun initData(){data.add("内容----1")data.add("内容----2")data.add("内容----3")data.add("内容----4")data.add("内容----5")data.add("内容----6")}
}