I create a recyclerview with adapter, i use a ws that provide all the available merchants but  i want to display only 4 element.
I had the idea of ​​creating an empty array and fill it with the 4 element but an error appear "    java.lang.ArrayIndexOutOfBoundsException: length=0; index=0"
how can i  display only 4 element in recyclerview ?
the following code for adapter :
class MerchantItemAdapter(private val merchants: Array<MerchantData>) :        RecyclerView.Adapter<MerchantItemAdapter.ViewHolder>() {    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {        val view = LayoutInflater.from(parent.context).inflate(R.layout.merchant_item, parent, false)        return ViewHolder(view)    override fun getItemCount() = merchants.size    override fun onBindViewHolder(holder: ViewHolder, position: Int) {        val itemMerchant: MerchantData = merchants[position]        holder.merchantName.text = itemMerchant.name?.get("En").toString()        if (itemMerchant.logo != null) {            Picasso.get()                    .load(".../${itemMerchant.logo}")                    .into(holder.merchantImage, object : com.squareup.picasso.Callback {                        override fun onError(e: Exception?) {                            holder.merchantImage.setImageResource(R.drawable.homecraftdefault)                        override fun onSuccess() {                            Picasso.get().load("...${itemMerchant.logo}")                                    .into(holder.merchantImage)    inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {        val merchantName: TextView = itemView.merchantName        val merchantImage: ImageView = itemView.merchantImage    interface OnItemClickListener {        fun onItemClick(view: View, viewModel: MerchantData) }

and this contain the activity :
class MainActivity : AppCompatActivity() {    var mobileApi: MobileApi? = null    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(R.layout.activity_main)        mobileApi = MobileApi()        val params = HashMap<String, String>()        GlobalScope.launch(Dispatchers.IO) {            val merchants = mobileApi!!GetAllPost(params, 0, 50, "", "")            var merchantListView : Array<MerchantData> =  arrayOf()            if(merchants.size < 4 ){                merchantListView = merchants            }else{                for(i in 0..3) {                    merchantListView[i] = merchants[i]            withContext(Dispatchers.Main) {                recyclerViewMerchantList.apply {                    recyclerViewMerchantList.layoutManager =                            LinearLayoutManager(this@MainActivity, RecyclerView.HORIZONTAL, false)                    recyclerViewMerchantList.adapter = MerchantItemAdapter(merchantListView) <div class="sline">He's giving us the slip! Quick! Grab this tiny ad!</div> <div class="dx5descr">We need your help - Coderanch server fundraiser</div> <a href="/forums/banner/redirect/1097/286" target="_blank" class="dx5">https://coderanch.com/t/782867/Coderanch-server-fundraiser</a> <div class="hasScript" style="display: none;">current ranch time (not your local time) is <b>Aug 23, 2024 00:55:39</b></div> <noscript>all times are in ranch time: GMT-6 in summer, GMT-7 in winter</noscript> <a href="https://coderanch.com/t/660243/Wiki/Contact">contact us</a> | <a href="https://coderanch.com/advertising/">advertise</a> |