StickyConcatAdapter.kt

import android.view.ViewGroup
import androidx.recyclerview.widget.ConcatAdapter
import androidx.recyclerview.widget.RecyclerView
import com.jay.widget.StickyHeaders

class StickyConcatAdapter(
    private val concatAdapter: ConcatAdapter
) : RecyclerView.Adapter<RecyclerView.ViewHolder>(), StickyHeaders {

    override fun isStickyHeader(position: Int): Boolean = position == 1

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

    override fun getItemCount(): Int = concatAdapter.itemCount

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

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int, payloads: MutableList<Any>) =
        concatAdapter.onBindViewHolder(holder, position, payloads)

    override fun findRelativeAdapterPositionIn(
        adapter: RecyclerView.Adapter<out RecyclerView.ViewHolder>,
        viewHolder: RecyclerView.ViewHolder,
        localPosition: Int
    ): Int = concatAdapter.findRelativeAdapterPositionIn(adapter, viewHolder, localPosition)

    override fun getItemViewType(position: Int): Int = concatAdapter.getItemViewType(position)

    override fun setHasStableIds(hasStableIds: Boolean) = concatAdapter.setHasStableIds(hasStableIds)

    override fun getItemId(position: Int): Long = concatAdapter.getItemId(position)

    override fun onViewRecycled(holder: RecyclerView.ViewHolder) = concatAdapter.onViewRecycled(holder)

    override fun onFailedToRecycleView(holder: RecyclerView.ViewHolder): Boolean =
        concatAdapter.onFailedToRecycleView(holder)

    override fun onViewAttachedToWindow(holder: RecyclerView.ViewHolder) = concatAdapter.onViewAttachedToWindow(holder)

    override fun onViewDetachedFromWindow(holder: RecyclerView.ViewHolder) =
        concatAdapter.onViewDetachedFromWindow(holder)

    override fun registerAdapterDataObserver(observer: RecyclerView.AdapterDataObserver) =
        concatAdapter.registerAdapterDataObserver(observer)

    override fun unregisterAdapterDataObserver(observer: RecyclerView.AdapterDataObserver) =
        concatAdapter.unregisterAdapterDataObserver(observer)

    override fun onAttachedToRecyclerView(recyclerView: RecyclerView) =
        concatAdapter.onAttachedToRecyclerView(recyclerView)

    override fun onDetachedFromRecyclerView(recyclerView: RecyclerView) =
        concatAdapter.onDetachedFromRecyclerView(recyclerView)

    override fun setStateRestorationPolicy(strategy: StateRestorationPolicy) {
        concatAdapter.stateRestorationPolicy = strategy
    }
}