Android - Kotlin Easy Adapter

AnyAdapter.kt

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView

abstract class AnyAdapter<T>(val items: MutableList<T>) : RecyclerView.Adapter<AnyViewHolder<T>>() {

    abstract fun getLayoutId(): Int

    abstract fun onCreateViewHolder(view: View): AnyViewHolder<T>

    abstract fun onBindedViewHolder(holder: AnyViewHolder<T>, data: T)

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AnyViewHolder<T> = onCreateViewHolder(
        LayoutInflater.from(parent.context).inflate(getLayoutId(), parent, false)
    )

    override fun getItemCount(): Int = items.size

    override fun onBindViewHolder(holder: AnyViewHolder<T>, position: Int) {
        holder.bind(items[position])
        onBindedViewHolder(holder, items[position])
    }

}

AnyViewHolder.kt

import android.view.View
import androidx.recyclerview.widget.RecyclerView

abstract class AnyViewHolder<T>(itemView: View) : RecyclerView.ViewHolder(itemView) {

    abstract fun bind(data: T)

}

AnyViewModelAdapter.kt

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.databinding.DataBindingUtil
import androidx.databinding.ViewDataBinding
import androidx.recyclerview.widget.RecyclerView

abstract class AnyViewModelAdapter<T, V : ViewDataBinding>(
    val items: MutableList<T>
) : RecyclerView.Adapter<AnyViewModelHolder<T, V>>() {

    constructor(layoutId: Int, clickHandler: ((data: MODEL) -> Unit)?) : this(layoutId, mutableListOf(), clickHandler)

    abstract fun getLayoutId(): Int

    abstract fun onCreateViewHolder(view: View): AnyViewModelHolder<T, V>

    abstract fun onBindedViewHolder(holder: AnyViewModelHolder<T, V>, data: T)

    protected lateinit var binding: V

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AnyViewModelHolder<T, V> {
        return AnyViewModelHolder(
            DataBindingUtil.inflate(
                LayoutInflater.from(parent.context),
                getLayoutId(),
                parent,
                false
            )
        )
    }

    override fun getItemCount(): Int = items.size

    override fun onBindViewHolder(holder: AnyViewModelHolder<T, V>, position: Int) {
        holder.bind(items[position])
        onBindedViewHolder(holder, items[position])
    }

}

AnyViewModelHolder.kt

import androidx.databinding.ViewDataBinding
import androidx.databinding.library.baseAdapters.BR
import androidx.recyclerview.widget.RecyclerView

open class AnyViewModelHolder<T, V : ViewDataBinding>(
    private val binding: V
) : RecyclerView.ViewHolder(binding.root) {

    fun bind(data: T) {
        binding.setVariable(BR.viewmodel, data)
        binding.executePendingBindings()
    }

}

ExampleAdapter.kt

  class OutletListAdapter(items: MutableList<ExampleData>) : AnyAdapter<ExampleData>(items) {

    override fun getLayoutId(): Int = R.layout.item_example

    override fun onCreateViewHolder(view: View): AnyViewHolder<OutletListData> {
        return OutletListViewHolder(view)
        
        // ALTERNATIVE you may use dataBinding instead like this,
        // return OutletListViewHolder(ItemExampleBinding.bind(view))
    }

    override fun onBindedViewHolder(holder: AnyViewHolder<ExampleData>, data: ExampleData) {
        // TODO something here, like adding listener?
        // holder.itemView.setOnClickListener(someListenerHere)
    }

}

ExampleData.kt

data class ExampleData(
  val id: Long,
  val name: String,
  val phone: String,
  val description: String
)

ExampleViewHolder.kt

/**
* Example ViewHolder with databinding
*/
class ExampleViewHolder(private val mBinding: ItemOutletBinding) : AnyViewHolder<ExampleData>(mBinding.root) {

    override fun bind(data: OutletListData) {
        mBinding.setVariable(BR.data, data)
        mBinding.executePendingBindings()
    }

}

/**
* Without data binding
*/
class ExampleViewHolder(view: View) : AnyViewHolder<ExampleData>(view) {

    override fun bind(data: ExampleData) {
        // do some binding like 
      itemView.tvName.text = data.name
      iteMView.tvPhone.text = data.phone
    }

}