when i get stock count is 0 from response the product is not shown but the product place shows empty spaces in grid recycler view kotlin. i pass the whole list into adapter and then filter it by stock count. if stock count is 0, the product won't show but in app it shows empty place for that
class ProductListAdapter(
val productlists: List<Data>,
val context: Context,
val addCart: AddCartListener
) : RecyclerView.Adapter<ProductListAdapter.ProductListViewHolder>() {
private val TAG = "ProductListAdapter"
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ProductListViewHolder {
var itemView =
LayoutInflater.from(parent.context).inflate(R.layout.product_list, parent, false)
return ProductListViewHolder(itemView)
}
override fun onBindViewHolder(holder: ProductListViewHolder, position: Int) {
val product: Data = productlists[position]
val variantslist: List<Variant> = product.variants
holder.setIsRecyclable(false)
holder.productname.text = product.name
Glide.with(holder.itemView.context)
.load(product.image)
.into(holder.productimage)
Log.e(TAG, "onBindViewHolder: " product.variants[0].cart_count)
if (variantslist.get(0).cart_count == 0) {
holder.btn_addcart.visibility = View.VISIBLE
holder.ll_cart.visibility = View.GONE
} else {
holder.btn_addcart.visibility = View.GONE
holder.ll_cart.visibility = View.VISIBLE
holder.tv_cart.text = variantslist.get(0).cart_count.toString()
}
holder.btn_addcart.setOnClickListener {
variantslist.get(0).cart_count = variantslist.get(0).cart_count 1
addCart.addCart(variantslist.get(0))
notifyDataSetChanged()
}
holder.tv_addcart.setOnClickListener {
variantslist.get(0).cart_count = variantslist.get(0).cart_count 1
addCart.addCart(variantslist.get(0))
notifyDataSetChanged()
}
holder.tv_removecart.setOnClickListener {
variantslist.get(0).cart_count = variantslist.get(0).cart_count - 1
addCart.addCart(variantslist.get(0))
notifyDataSetChanged()
}
if (variantslist[0].stock.toInt() > 0) {
holder.mrp.text = "₹" "%.2f".format(variantslist[0].price.toDouble())
holder.mrp.paintFlags = Paint.STRIKE_THRU_TEXT_FLAG
holder.discountprice.text =
"₹" "%.2f".format(variantslist[0].discounted_price.toDouble())
if (variantslist[0].measurement_unit_name == null) {
holder.singlevariant.text = variantslist[0].measurement " pcs"
holder.multivariant.text = variantslist[0].measurement " pcs"
} else {
holder.singlevariant.text =
variantslist[0].measurement variantslist[0].measurement_unit_name
holder.multivariant.text =
variantslist[0].measurement variantslist[0].measurement_unit_name
}
} else {
holder.singlevariant.visibility = View.GONE
holder.multivariant.visibility = View.GONE
holder.mrp.visibility = View.GONE
holder.discountprice.visibility = View.GONE
holder.productCardView.visibility = View.GONE
holder.ProductConstraint.visibility = View.GONE
holder.productimage.visibility = View.GONE
holder.productname.visibility = View.GONE
holder.btn_addcart.visibility = View.GONE
holder.ll_cart.visibility = View.GONE
holder.tv_addcart.visibility = View.GONE
holder.tv_removecart.visibility = View.GONE
holder.tv_cart.visibility = View.GONE
holder.pricediff.visibility = View.GONE
holder.pricedifference.visibility = View.GONE
}
var diffvalue =
((variantslist[0].price.toDouble() - variantslist[0].discounted_price.toDouble()))
var percentage = (diffvalue / variantslist[0].price.toDouble()) * 100
if (percentage > 3) {
holder.pricediff.visibility = View.VISIBLE
holder.pricedifference.visibility = View.VISIBLE
holder.pricediff.text = percentage.toInt().toString() "% \nOff"
} else {
holder.pricediff.visibility = View.GONE
holder.pricedifference.visibility = View.GONE
}
if (variantslist.size > 1) {
holder.multivariant.visibility = View.VISIBLE
holder.singlevariant.visibility = View.GONE
holder.multivariant.setOnClickListener {
//need to show dropown
showCustomDialog(product)
}
} else {
//navigate product details page
holder.singlevariant.visibility = View.VISIBLE
holder.multivariant.visibility = View.GONE
}
holder.itemView.setOnClickListener {
movefrag(product)
}
}
open fun getUserId(): String? {
val preferences = context.getSharedPreferences(
"userInfo",
Activity.MODE_PRIVATE
) //Frequent to get SharedPreferences need to add a step getActivity () method
return preferences.getString("customer_id", "90336")
}
fun movefrag(product: Data) {
addCart.navFragment(product)
}
fun showCustomDialog(product: Data) {
val dialog = Dialog(context)
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
dialog.setCancelable(false)
dialog.setContentView(R.layout.dialog_listview)
val btndialog: Button = dialog.findViewById(R.id.btndialog) as Button
btndialog.setOnClickListener { dialog.dismiss() }
val listView: ListView = dialog.findViewById(R.id.listview) as ListView
val adapter = VariantAdapter(context, product, addCart)
listView.adapter = adapter
listView.setOnItemClickListener(AdapterView.OnItemClickListener { parent, view, position, id ->
Log.e(TAG, "showCustomDialog: " adapter.getItem(position))
dialog.dismiss()
})
dialog.setCanceledOnTouchOutside(true)
dialog.show()
}
override fun getItemCount(): Int {
return productlists.size
}
class ProductListViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
var productimage: ImageView
var productname: TextView
var mrp: TextView
var discountprice: TextView
var btn_addcart: TextView
var ll_cart: LinearLayout
var tv_addcart: TextView
var tv_removecart: TextView
var tv_cart: TextView
var multivariant: TextView
var singlevariant: TextView
var pricediff: TextView
var pricedifference: ImageView
var productCardView: CardView
var ProductConstraint: ConstraintLayout
init {
productimage = itemView.productimage
productname = itemView.productname
mrp = itemView.mrp
discountprice = itemView.Discountprice
btn_addcart = itemView.btn_addcart
ll_cart = itemView.ll_cart
tv_addcart = itemView.tv_addcart
tv_removecart = itemView.tv_removecart
tv_cart = itemView.tv_cart
multivariant = itemView.multivariant
singlevariant = itemView.singlevariant
pricediff = itemView.pricediff
pricedifference = itemView.pricedifference
productCardView = itemView.productcardview
ProductConstraint = itemView.productconstraint
}
}
}
This is the image of Best Sellers , i should not get that empty between items
This is the Fragment Code
private fun getpopular() {
LoadingUtils.showDialog(context, false)
username = getUserId()
val retrofitBuilder = Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(BASE_L)
.build()
.create(ApiInterface::class.java)
val retrofitData = retrofitBuilder.getpopularproductitems(90336, username!!)
retrofitData.enqueue(object : Callback<productlist> {
override fun onResponse(call: Call<productlist>, response: Response<productlist>) {
Log.e("latest", "res-" response.body())
val responsebody: productlist = response.body()!!
LoadingUtils.hideDialog()
popularadapter = popularproductAdapter(frag, responsebody.data, addCart)
popularadapter.notifyDataSetChanged()
linearLayoutManager = LinearLayoutManager(context)
popularproductsRView.adapter = popularadapter
}
override fun onFailure(call: Call<productlist>, t: Throwable) {
Log.d("MainError", "onFailure: " t.message)
LoadingUtils.hideDialog()
}
})
}
CodePudding user response：
I am considering the productlist class as follows:
data class productlist(val uid: Int, val data: List<BasicTimer>,...)
And your Data class is as follows:
data class Data(val uid: Int, var stock_count: Int,...)
First thing first change the name for the variable data in productlist class as it is a keyword of Kotlin.
Now in the retrofitData.enqueue() filter the list which does have a stock_count > 0
Replace the following line :
popularadapter = popularproductAdapter(frag, responsebody.data, addCart)
with:
popularadapter = popularproductAdapter(frag, responsebody.data.filter{it.stock_count > 0}, addCart)
This will not send objects with stock_count = 0 to the RecyclerView to be rendered.
Better option is to use a ViewModel with the RecyclerView so that you can observer if the data has changed after the initial run.