Android RecyclerView With Different Layout / View Type (Kotlin)

Declare classes for different layout / view type. I have two different layout classes: Image and Property, where both implement resource: Int to store the layout id.

sealed class ViewItem(val resource: Int) {    class Image(val imageResource: String): ViewItem(R.layout.content_pin_list_item_image)    class Property(val icon: Int?,                   val value: String,                   val onClick: (() -> Unit)? = null,                   val onInit: ((viewHolder: LocalListAdapter.ViewHolder) -> Unit)? = null): ViewItem(R.layout.content_pin_list_item)}

NOTE: If you don't like sealed class, you could use abstract or interface.

Declare the adapter class.

getItemViewType return layout id, which is used in onCreateViewHolder to inflate layout by viewType.
I use LayoutContainer Support to enable Android Extensions plugin supports for ViewHolder. You can access view by id using holder.<VIEW_ID> syntax.

class LocalListAdapter() : RecyclerView.Adapter<LocalListAdapter.ViewHolder>() {    private var items: List<ViewItem> = listOf()    override fun getItemCount(): Int {        return items.size    }    override fun getItemViewType(position: Int): Int {        return items[position].resource    }    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {        val view = LayoutInflater.from(parent.context)                .inflate(viewType, parent, false)        return ViewHolder(view)    }    override fun onBindViewHolder(holder: ViewHolder, position: Int) {        val item = items[position]        val context = holder.containerView.context        when (item) {            is ViewItem.Image -> {                holder.apply {                    /*                    Glide.with(itemView)                            .load(item.imageResource)                            .into(imageView)                    imageView.setOnClickListener {                    }                     */                }            }            is ViewItem.Property -> {                holder.apply {                    /*                    if (item.icon != null) {                        iconImageView.setImageResource(item.icon)                    }                    else {                        iconImageView.isVisible = false                    }                    textView.text = item.value                    if (item.onClick != null) {                        itemView.setOnClickListener {                            item.onClick?.invoke()                        }                    }                    else {                        itemView.setOnClickListener(null)                        itemView.setBackgroundColor(Color.TRANSPARENT)                    }                    item.onInit?.let { init ->                        init.invoke(this)                    }                      */                }            }        }    }    fun replaceItems(items: List<ViewItem>) {        this.items = items        notifyDataSetChanged()    }    inner class ViewHolder(override val containerView: View) : RecyclerView.ViewHolder(containerView), LayoutContainer}

I usually initialize the adapter with empty items.

adapter = LocalListAdapter()recyclerView.adapter = adapter

When items are loaded from network or database, call replaceItems.

val items = mutableListOf<ViewItem>()// load image items.add(ViewItem.Image("https://code.luasoftware.com/img/logo-badge.png"))// load property - infoViewItem.Property(R.drawable.ic_map_black_24dp, "My Address").also {    items.add(it)}// load property - info + clickViewItem.Property(R.drawable.ic_access_time_black_24dp,         "Click Me",        onClick = {             // do something        }).also {    items.add(it)}adapter.replaceItems(items)