Koltin40.Takeout首页详情界面条目内容填充(26)

最新推荐文章于 2020-11-05 01:40:59 发布

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本文介绍了如何在GoodsAdapter中填充和完善商品列表视图，包括使用 Picasso 加载图片、设置价格格式以及实现点击事件。展示了如何使用StickyListHeadersAdapter来保持列表头部固定，并更新了PriceFormater类进行价格转换。

GoodsAdapter.kt界面的元素的填充和完善

package com.example.takeout.ui.adapter

import android.graphics.Color
import android.graphics.Paint
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.BaseAdapter
import android.widget.ImageButton
import android.widget.ImageView
import android.widget.TextView
import androidx.fragment.app.FragmentActivity
import com.example.takeout.R
import com.example.takeout.model.beans.GoodsInfo
import com.example.takeout.ui.fragment.GoodsFragment
import com.example.takeout.utils.PriceFormater
import com.squareup.picasso.Picasso
import org.jetbrains.anko.find
import se.emilsjolander.stickylistheaders.StickyListHeadersAdapter

class GoodsAdapter(val context: FragmentActivity?, val goodsFragment: GoodsFragment) : BaseAdapter(), StickyListHeadersAdapter {

    val host = "http://127.0.0.1:8090/image?name="

    var goodsList: List<GoodsInfo> = ArrayList()

    fun setDatas(goodsInfoList: List<GoodsInfo>) {
        this.goodsList = goodsInfoList
        notifyDataSetChanged()
    }

    inner class GoodsItemHolder(itemView: View) : View.OnClickListener {

        override fun onClick(v: View?) {
            TODO("Not yet implemented")
        }

        val ivIcon: ImageView
        val tvName: TextView
        val tvForm: TextView
        val tvMonthSale: TextView
        val tvNewPrice: TextView
        val tvOldPrice: TextView
        val btnAdd: ImageButton
        val btnMinus: ImageButton
        val tvCount: TextView
        lateinit var goodsInfo: GoodsInfo

        init {
            ivIcon = itemView.find(R.id.iv_icon)
            tvName = itemView.find(R.id.tv_name)
            tvForm = itemView.find(R.id.tv_form)
            tvMonthSale = itemView.find(R.id.tv_month_sale)
            tvNewPrice = itemView.find(R.id.tv_newprice)
            tvOldPrice = itemView.find(R.id.tv_oldprice)
            tvCount = itemView.find(R.id.tv_count)
            btnAdd = itemView.find(R.id.ib_add)
            btnMinus = itemView.find(R.id.ib_minus)
            btnAdd.setOnClickListener(this)
            btnMinus.setOnClickListener(this)
        }

        fun bindData(goodsInfo: GoodsInfo) {
            this.goodsInfo = goodsInfo
            //图片路径http://127.0.0.1:8090/image?name=takeout/businessimg/goods/0.jpg
            Picasso.with(context).load(host + goodsInfo.icon).into(ivIcon)
            tvName.text = goodsInfo.name
//            tvForm.text = goodsInfo.form
            tvMonthSale.text = "月售${goodsInfo.monthSaleNum}份"
            tvNewPrice.text = PriceFormater.format(goodsInfo.newPrice.toFloat())
//            tvNewPrice.text = "$${goodsInfo.newPrice}"
            tvOldPrice.text = "￥${goodsInfo.oldPrice}"
            tvOldPrice.paint.flags = Paint.STRIKE_THRU_TEXT_FLAG
            if (goodsInfo.oldPrice > 0) {
                tvOldPrice.visibility = View.VISIBLE
            } else {
                tvOldPrice.visibility = View.GONE
            }
//            tvCount.text = goodsInfo.count.toString()
            if (goodsInfo.count > 0) {
                tvCount.visibility = View.VISIBLE
                btnMinus.visibility = View.VISIBLE
            } else {
                tvCount.visibility = View.INVISIBLE
                btnMinus.visibility = View.INVISIBLE
            }
        }
    }

    override fun getCount(): Int {
        return goodsList.size
    }

    override fun getItem(position: Int): Any {
        return goodsList.get(position)
    }

    override fun getItemId(position: Int): Long {
        return position.toLong()
    }

    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
        var itemView: View
        val goodsItemHolder: GoodsItemHolder
        if (convertView == null) {
            itemView = LayoutInflater.from(context).inflate(R.layout.item_goods, parent, false)
            goodsItemHolder = GoodsItemHolder(itemView)
            itemView.tag = goodsItemHolder
        } else {
            itemView = convertView
            goodsItemHolder = convertView.tag as GoodsItemHolder
        }
        goodsItemHolder.bindData(goodsList.get(position))
        return itemView
    }

    override fun getHeaderView(position: Int, convertView: View?, parent: ViewGroup?): View {
        val goodsInfo: GoodsInfo = goodsList.get(position)
        val typeName = goodsInfo.typeName
        val textView: TextView = LayoutInflater.from(context).inflate(R.layout.item_type_header, parent, false) as TextView
        textView.text = typeName
        textView.setTextColor(Color.BLACK)
        return textView
    }

    override fun getHeaderId(position: Int): Long {
        val goodsInfo: GoodsInfo = goodsList.get(position)
        return goodsInfo.typeId.toLong()
    }
}

PriceFormater.kt价格转换

package com.example.takeout.utils

import java.text.NumberFormat

object PriceFormater {

    fun format(countPrice: Float): String {
        val format = NumberFormat.getCurrencyInstance()
        format.maximumFractionDigits = 2
        return format.format(countPrice.toDouble())
    }
}

效果如下：