Android为RecyclerView设置header和footer（RecyclerView.Adapter和BaseQuickAdapter两种方式）

RecyclerView.Adapter的方式

    private fun initView() {
        val list = arrayListOf<String>()
        repeat(9) {
            list.add(it.toString())
        }
        binding.rvList.adapter = MyAdapter(list)
        binding.rvList.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
    }

package maka.components.myheaderfooter

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import android.widget.Toast
import androidx.recyclerview.widget.RecyclerView

private const val TYPE_HEADER = 0
private const val TYPE_NORMAL = 1
private const val TYPE_FOOTER = 2

class MyAdapter(private val list: ArrayList<String>) :
    RecyclerView.Adapter<MyAdapter.MyViewHolder>() {

    var headerView: View? = null
    var footerView: View? = null

    //根据viewType生成不同的View
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        return when (viewType) {
            TYPE_HEADER -> {
                headerView =
                    LayoutInflater.from(parent.context)
                        .inflate(R.layout.item_recycler_header, parent, false)
                MyViewHolder(headerView!!)
            }
            TYPE_FOOTER -> {
                footerView =
                    LayoutInflater.from(parent.context)
                        .inflate(R.layout.item_recycler_footer, parent, false)
                MyViewHolder(footerView!!)
            }
            else -> {
                val itemView =
                    LayoutInflater.from(parent.context)
                        .inflate(R.layout.item_recycler_item, parent, false)
                MyViewHolder(itemView)
            }
        }
    }

    //将数据设置到item上
    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        //position-1是需要减去header的位置
        val realPosition = position - 1
        holder.tvTest?.text = list[realPosition]
    }

    //获取item总数，包括header和footer，否则会少数据
    override fun getItemCount(): Int {
        return list.size + 2//加上header和footer
    }

    //重写这个方法，很重要，是加入Header和Footer的关键，我们通过判断item的类型，从而绑定不同的view
    override fun getItemViewType(position: Int): Int {
        if (position == 0) return TYPE_HEADER
        if (position == itemCount - 1) return TYPE_FOOTER
        return TYPE_NORMAL
    }

    inner class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        var tvTest: TextView? = null

        init {
            when (itemView) {
                footerView -> {
                    footerView?.setOnClickListener {
                        Toast.makeText(itemView.context, "footer", Toast.LENGTH_SHORT).show()
                    }
                }
                headerView -> {
                    headerView?.setOnClickListener {
                        Toast.makeText(itemView.context, "header", Toast.LENGTH_SHORT).show()
                    }
                }
                else -> {
                    tvTest = itemView.findViewById(R.id.tv_test)
                    tvTest?.setOnClickListener {
                        Toast.makeText(
                            itemView.context,
                            "" + (layoutPosition - 1),
                            Toast.LENGTH_SHORT
                        )
                            .show()
                    }
                }
            }
        }
    }

}

BaseQuickAdapter的方式

    //https://github.com/CymChad/BaseRecyclerViewAdapterHelper
    implementation "com.github.CymChad:BaseRecyclerViewAdapterHelper:3.0.4"

    private fun initView() {
        val list = arrayListOf<String>()
        repeat(9) {
            list.add(it.toString())
        }
        val adapter2 = MyAdapter2(R.layout.item_recycler_item)
        adapter2.data = list
        adapter2.addHeaderView(layoutInflater.inflate(R.layout.item_recycler_header, null))
        adapter2.addFooterView(layoutInflater.inflate(R.layout.item_recycler_footer, null))
        binding.rvList.adapter = adapter2
        binding.rvList.layoutManager =
            LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
    }

package maka.components.myheaderfooter

import android.widget.TextView
import android.widget.Toast
import com.chad.library.adapter.base.BaseQuickAdapter
import com.chad.library.adapter.base.viewholder.BaseViewHolder

class MyAdapter2(layoutResId: Int) : BaseQuickAdapter<String, BaseViewHolder>(layoutResId) {

    init {
        setOnItemClickListener { _, _, position ->
            Toast.makeText(context, "position=$position", Toast.LENGTH_SHORT).show()
        }
    }

    override fun convert(holder: BaseViewHolder, item: String) {
        val tvTest = holder.getView<TextView>(R.id.tv_test)
        tvTest.text = item
    }
}

本文地址：https://blog.csdn.net/yu540135101/article/details/112513534