kotlin RecyclerViewAdapter IndexOutOfBoundException

Question

我已经从Java迁移到Kotlin并创建了这个rec​​yclerViewAdapter：

class MisPedidosAdapter(private val context: Context, private var pedidos: List<ParseObject>?, private val onMisPedidosClickListener: OnMisPedidosClickListener) : CustomRecyclerViewAdapter() {

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {

    when(getItemViewType(viewType)){
        STATIC ->return NoMisPedidosHolder(LayoutInflater.from(parent.context).inflate(R.layout.no_pedidos_recibidos_item, parent, false))
        else -> return MisPedidosHolder(LayoutInflater.from(parent.context).inflate(R.layout.mis_pedidos_item, parent, false), onMisPedidosClickListener, pedidos)
    }
}

override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {

    if (getItemViewType(position) == STATIC)
    {
        val mHolder = holder as NoMisPedidosHolder
    }
    else
    {
        val mHolder = holder as MisPedidosHolder

        val pedido = pedidos!![position]
        val menuShop = pedido.getParseObject("menu_shop")
        mHolder.numPlati.text = pedido.getNumber("quantity")?.toInt().toString()
        mHolder.horario.text = pedido.getString("horario")

        mHolder.dateOrder.text = StringUtils.getDataFormatted("dd MMM yyyy", pedido.createdAt!!)

    }
}

override fun getItemViewType(position: Int): Int = when{
    pedidos!!.isEmpty() -> STATIC
    else -> DINAMIC
}

override fun getItemCount(): Int = when{
    pedidos!!.isEmpty() -> 1
    else -> pedidos!!.size
}

fun updatePedidos(pedidos: List<ParseObject>) {
    this.pedidos = pedidos
    notifyDataSetChanged()
}

companion object {
    private val STATIC = 0
    private val DINAMIC = 1
 }
 }

问题在于，当我在Kotlin中list.size时，它还包括大小索引（例如，如果大小为4，则考虑{0,1,2,3,4}） 。当我用于循环时，我可以使用until锁定{0,1,2,3}，但在这种情况下，我不知道该怎么做。 有人知道解决方法吗？感谢

Answer 1

使用此

override fun getItemCount(): Int = when{
    pedidos!!.isEmpty() -> 0
    else -> pedidos!!.size
}

这是

的内容

override fun getItemCount(): Int = when{
    pedidos!!.isEmpty() -> 1
    else -> pedidos!!.size
}

Answer 2

您必须更换

 when(getItemViewType(viewType)){

与

 when(viewType){