这是我的RecyclerView适配器代码
class RecyclerAdapterMain(
val product: ArrayList<ModelProductMain>,
val viewmodel: ViewModelRoom,
val newitem: List<ModelItemsNew>
) :
RecyclerView.Adapter<RecyclerAdapterMain.ViewHolder>() {
class ViewHolder(itemview: View) : RecyclerView.ViewHolder(itemview) {
val title: TextView = itemview.product_txt
val price: TextView = itemview.price_product
val imageproduct: ImageView = itemview.product_image
val btn_add_product: Button = itemview.btn_add_product
val amount_value: TextView = itemview.amount_value
val button_remove_product: Button = itemview.button_remove_product
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val layoutview =
LayoutInflater.from(parent.context).inflate(R.layout.product_items, parent, false)
return ViewHolder(layoutview)
}
override fun getItemCount(): Int = product.size
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val products = product[position]
holder.title.text = products.title
holder.price.text = products.price.toString()
Picasso.get().load(products.image).into(holder.imageproduct)
holder.itemView.setOnClickListener {
val bundle = Bundle()
val myfragment = ItemDetailsfragment()
myfragment.arguments = bundle
val activity = it.context as AppCompatActivity
activity.supportFragmentManager.beginTransaction()
.replace(R.id.homepage, myfragment)
.commit()
bundle.putString("title", products.title)
bundle.putString("price", products.price.toString())
bundle.putString("image", products.image.toString())
}
holder.amount_value.visibility = View.GONE
holder.button_remove_product.visibility = View.GONE
holder.btn_add_product.setOnClickListener {
holder.amount_value.visibility = View.VISIBLE
holder.button_remove_product.visibility = View.VISIBLE
holder.amount_value++
}
}
问题是我希望在按下按钮时增加产品数量...为此，我需要每个商品的位置，但是我的商品的第一个模型(重写fun getItemCount():Int = product.size)得到了我的新模型需要的位置(val newitem:List)。
我试过这段代码val productpos = newitem.position，并给我错误，大小为1，索引也为1 ...
我不知道该如何解决。刚才我需要一个新模型的职位。如何获得新职位？
最佳答案
试试这个:
val productpos = newitem.get(position)
override fun getItemCount(): Int = product.size + newitem.size
关于android - 我如何在RecyclerView Adapter中获得第二个模型的位置，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/63552637/