DjakaTechnology

object ViewBindingAdapter {
    @BindingAdapter("visibilityGone")
    @JvmStatic
    fun visibilityGone(view: View, isShouldGone: Boolean) {
        if (isShouldGone) {
            view.visibility = View.GONE
        } else {
            view.visibility = View.VISIBLE
        }
    }

DjakaTechnology

class MainActivity : AppCompatActivity() {

    lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
        binding.buttonContinue.setOnClickListener {
            binding.name = Random.nextInt(100).toString()
        }

DjakaTechnology

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>
        <variable
            name="name"
            type="String" />
    </data>

    <LinearLayout

DjakaTechnology

class MainActivity : AppCompatActivity() {

    lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
    }
}

DjakaTechnology

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
      
        ...

DjakaTechnology

class WithoutHolderActivity : AppCompatActivity() {
    private val adapter = GenericAdapter(Utils.getFeedItems())

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_without_holder)

        initAdapter()
        initRV()
    }

DjakaTechnology

//If you dont want to use GenericAdapter
class FeedAdapter(var items: List<FeedItem>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {

    private val delegateManager = AdapterDelegateManager<FeedItem>()

    init {
        delegateManager.run {
            addDelegate(FeedPostAdapterDelegate())
            addDelegate(FeedStandardAdapterDelegate())
            addDelegate(FeedStoryAdapterDelegate())

DjakaTechnology

class FeedStoryAdapterDelegate : AdapterDelegate<FeedItem> {
    override fun isForViewType(items: List<FeedItem>, position: Int): Boolean {
        return items[position] is FeedStoryItem
    }

    override fun onCreateViewHolder(parent: ViewGroup): RecyclerView.ViewHolder {
        return ItemStoryViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.feed_story_item, parent, false))
    }

    override fun onBindViewHolder(items: List<FeedItem>, position: Int, holder: RecyclerView.ViewHolder) {

DjakaTechnology

class FeedStandardAdapterDelegate : AdapterDelegate<FeedItem> {
    override fun isForViewType(items: List<FeedItem>, position: Int): Boolean {
        return items[position] is FeedStandardItem
    }

    override fun onCreateViewHolder(parent: ViewGroup): RecyclerView.ViewHolder {
        return ItemStandardViewHolder(
            LayoutInflater.from(parent.context).inflate(R.layout.feed_standard_item, parent, false)
        )
    }

DjakaTechnology

class FeedPostAdapterDelegate : AdapterDelegate<FeedItem> {
    override fun isForViewType(items: List<FeedItem>, position: Int): Boolean {
        return items[position] is FeedPostItem
    }

    override fun onCreateViewHolder(parent: ViewGroup): RecyclerView.ViewHolder {
        return ItemPostViewHolder(
            LayoutInflater.from(parent.context).inflate(R.layout.feed_post_item, parent, false)
        )
    }