Let's create a custom RecycleView adapter named PostRecycleViewAdapter.kt to display the post list. We have shown you how to create custom adapters in Chapter 4, Spring Modules for Android, so we won't repeat it. Here is the PostRecycleViewAdapter class:

class PostRecycleViewAdapter(private var context: Context,
                       private val postList: List<Post>):
RecyclerView.Adapter<PostRecycleViewAdapter.ViewHolder>() {
-----
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}

Now create the ViewHolder class and initialize all the content of the post_item layout in PostRecycleViewAdapter.kt, as shown in the following code:

class ViewHolder(view: View): RecyclerView.ViewHolder(view){
    val postRoot = view.findViewById(R.id.postRoot) as ConstraintLayout

    val profileFullName = view.findViewById(R.id.profileFullNamePost) as TextView
    val username = view.findViewById(R.id.usernamePost) as TextView
    val postedDate = view.findViewById(R.id.postedDate) as TextView
    val postText = view.findViewById(R.id.postText) as TextView
}

Now override onCreateViewHolder() and return the ViewHolder class:

override fun onCreateViewHolder(viewGroup: ViewGroup, p1: Int): ViewHolder {
    val layoutInflater = LayoutInflater.from(context).inflate(R.layout.post_item, viewGroup, false)
    return ViewHolder(layoutInflater)
}

Now, we need to set the value in every raw of the list based on its position. To do this, override the onBindViewHolder() function and add this code:

override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {

    val userDetails = postList[position]

    viewHolder.profileFullName.text = "${userDetails.profile!!.firstName} ${userDetails.profile!!.lastName} "
    viewHolder.username.text = userDetails.profile!!.username
    viewHolder.postedDate.text = userDetails.postCreatedTime
    viewHolder.postText.text = userDetails.text

}