Android.RecyclerViewwithcollapsingitems
创始人
2024-08-20 03:00:05
0

Android中使用RecyclerView实现可折叠项的方法是使用ExpandableRecyclerView库。这个库提供了可折叠项的功能,非常适合需要展示大量嵌套数据的场景。

首先,需要在build.gradle文件中添加以下依赖项:

implementation 'com.github.bignerdranch:expandablerecyclerview:4.0.1-RC1'

接着,在布局文件中使用ExpandableRecyclerView代替RecyclerView。在adapter中,需要实现ExpandableRecyclerAdapter来处理可折叠项的展开和折叠。以下是一个adapter的例子:

class MyExpandableAdapter(private val itemList: List) :
    ExpandableRecyclerAdapter(itemList) {

    override fun onCreateParentViewHolder(parentViewType: Int, parentView: ViewGroup): RecyclerView.ViewHolder {
        val view = LayoutInflater.from(parentView.context).inflate(R.layout.item_group, parentView, false)
        return GroupViewHolder(view)
    }

    override fun onCreateChildViewHolder(childViewType: Int, childView: ViewGroup): RecyclerView.ViewHolder {
        val view = LayoutInflater.from(childView.context).inflate(R.layout.item_child, childView, false)
        return ChildViewHolder(view)
    }

    override fun onBindParentViewHolder(parentViewHolder: RecyclerView.ViewHolder, parentPosition: Int, item: ItemGroup) {
        val groupViewHolder = parentViewHolder as GroupViewHolder
        groupViewHolder.tvTitle.text = item.title
    }

    override fun onBindChildViewHolder(childViewHolder: RecyclerView.ViewHolder, parentPosition: Int, childPosition: Int, item: Item) {
        val childViewHolder = childViewHolder as ChildViewHolder
        childViewHolder.tvItemName.text = item.name
    }

    inner class GroupViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val tvTitle: TextView = itemView.findViewById(R.id.tvTitle)
    }

    inner class ChildViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val tvItemName: TextView = itemView.findViewById(R.id.tvItemName)
    }
}

最后,将adapter设置给ExpandableRecyclerView即可。

val recyclerView = findViewById(R.id

相关内容

热门资讯

透视美元局!哈糖大菠萝怎么挂,... 透视美元局!哈糖大菠萝怎么挂,哈糖大菠萝攻略,2025教程(有挂辅助);哈糖大菠萝怎么挂辅助器中分为...
透视中牌率!wejoker辅助... 透视中牌率!wejoker辅助器要钱玩吗,起初是有挂(透视)新2025版(有挂教程)1、wejoke...
透视安卓版!德州透视是真的假的... 透视安卓版!德州透视是真的假的,pokemmo手机版修改器,2025新版(有挂脚本);1、许多玩家不...
透视好友房!wepoker辅助... 透视好友房!wepoker辅助真的假的,起初是有挂(透视)透牌教程(有挂详情);wepoker辅助真...
透视好友房!uupoker有透... 透视好友房!uupoker有透视吗,pokernow辅助控制,玩家教你(有挂黑科技);1、不需要AI...
透视辅助!aapoker透视脚... 透视辅助!aapoker透视脚本下载,总是有挂(透视)技巧教程(有挂攻略);在进入aapoker透视...
透视中牌率!pokemmo脚本... 透视中牌率!pokemmo脚本辅助器下载,佛手在线大菠萝智能辅助器,黑科技教程(有挂介绍);1)佛手...
透视软件!hhpoker怎么破... 透视软件!hhpoker怎么破解,先前真的有挂(透视)总结教程(有挂细节)1、上手简单,内置详细流程...
透视肯定!聚星ai辅助工具激活... 透视肯定!聚星ai辅助工具激活码,哈糖大菠萝攻略,必赢方法(有挂揭秘)一、聚星ai辅助工具激活码AI...
透视美元局!xpoker透视辅... 透视美元局!xpoker透视辅助,原来有挂(透视)科技教程(有挂细节)1、下载好xpoker透视辅助...