点击加减

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本文链接： https://blog.csdn.net/LH_sunshine/article/details/102615021

设置加减

package com.example.mytakeout.ui.Adapter

import android.content.Context
import android.support.v7.widget.RecyclerView
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import com.bumptech.glide.Glide
import com.example.mytakeout.Modle.beans.MenuBean
import com.example.mytakeout.R
import com.example.mytakeout.utils.MenuOnClicklister
import kotlinx.android.synthetic.main.meaulist.view.*

class OrderAdapter(val context:Context?) : RecyclerView.Adapter<OrderAdapter.MyHolder>() {

    var list:ArrayList<MenuBean> = ArrayList()

    var menuOnClicklister:MenuOnClicklister ?= null

    fun setData(list: ArrayList<MenuBean>){
        this.list = list

        notifyDataSetChanged()

    }
    fun setClick( menuOnClicklister:MenuOnClicklister){
        this.menuOnClicklister = menuOnClicklister


    }




    override fun onCreateViewHolder(p0: ViewGroup, p1: Int): MyHolder {
          val view:View = LayoutInflater.from(context).inflate(R.layout.orderlist,p0,false)
        return MyHolder(view)
    }

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

    override fun onBindViewHolder(myHolder: MyHolder, postion: Int) {

          myHolder.menuname.text = list.get(postion).menuname
          Glide.with(context).load(list.get(postion).pic).into(myHolder.ima)
          myHolder.shapname.text = list.get(postion).shapname
          myHolder.menunum.text = list.get(postion).num.toString()
          myHolder.sum.text = list.get(postion).sum.toString()


        var num:Int =1
            myHolder.reduce.setOnClickListener {
                if(num<=1){

                }else {
                    num--
                    myHolder.sum.text = (num).toString()
                    myHolder.menunum.text = (list.get(postion).num*num).toString()
                }
            }

        myHolder.plus.setOnClickListener {
            num++
            myHolder.sum.text = (num).toString()
            myHolder.menunum.text = (list.get(postion).num*num).toString()
        }



          menuOnClicklister?.OnClicklister(myHolder.itemView,postion)
    }



  class MyHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val ima:ImageView
        val shapname:TextView
        val menuname:TextView
        val menunum:TextView
        val sum:TextView
        val reduce:TextView
        val plus :TextView

        init {
            ima = itemView.findViewById(R.id.order_ima)
            shapname = itemView.findViewById(R.id.order_shapname)
            menuname = itemView.findViewById(R.id.order_meauname)
            menunum = itemView.findViewById(R.id.order_menunum)
            sum = itemView.findViewById(R.id.order_sum)
            reduce = itemView.findViewById(R.id.order_reduce)
            plus = itemView.findViewById(R.id.order_plus)
        }
    }
}