Cannot support multiple ViewHolder in Adapter

[diegohdez90]

• [x] I have searched existing issues and confirmed this is not a duplicate

Issues and steps to reproduce

I create my Adapter that I use for my flex layout

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
     return when (viewType) {
            EMPTY_INTEREST -> {
                Log.i(InterestsAdapter::class.java.simpleName, "EMPTY_INTEREST")
                val itemView = LayoutInflater.from(parent.context)
                    .inflate(R.layout.add_interests_button, parent, false)
                EmptyInterestViewHolder(itemView)
            }
            INTEREST_ITEM -> {
                Log.i(InterestsAdapter::class.java.simpleName, "ITEM_INTEREST")
                val itemView = LayoutInflater.from(parent.context)
                    .inflate(R.layout.item_interest_profile, parent, false)
                InterestViewHolder(itemView)
            }
            ADD_INTEREST -> {
                Log.i(InterestsAdapter::class.java.simpleName, "ADD_INTEREST")
                val itemView = LayoutInflater.from(parent.context)
                    .inflate(R.layout.add_interest, parent, false)
                AddInterestViewHolder(itemView)
            }
            else -> throw RuntimeException("there is no type that matches the type $viewType + make sure your using types correctly")
        }
    }

Also I added my getItemViewType() to return my type of ViewHolder

    override fun getItemViewType(position: Int): Int {
        val vType = when {
            position < dataSource.size -> INTEREST_ITEM
            dataSource.size == 0 -> EMPTY_INTEREST
            else -> ADD_INTEREST
        }
        Log.i(InterestsAdapter::class.java.simpleName, "type:  $vType")
        return vType
    }

my Log display this:

2019-06-10 14:55:15.516 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: type:  1
2019-06-10 14:55:15.517 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: ITEM_INTEREST
2019-06-10 14:55:15.557 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: type:  1
2019-06-10 14:55:15.557 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: ITEM_INTEREST
2019-06-10 14:55:15.570 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: type:  1
2019-06-10 14:55:15.571 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: ITEM_INTEREST
2019-06-10 14:55:15.585 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: type:  2
2019-06-10 14:55:15.585 9303-9303/com.buddiefly.buddiefly I/InterestsAdapter: ADD_INTEREST

I have 3 items to display and the latest is a bottom that my adapter cannot display.

In my fragment I have this:

        val layoutManager = FlexboxLayoutManager(activity)
        layoutManager.flexDirection = FlexDirection.ROW
        layoutManager.justifyContent = JustifyContent.FLEX_START
        lookingForList.layoutManager = layoutManager
        lookingForList.adapter = adapter

Note: I am using kotlinx not AndroidX

my recylcerView is this:

                        <android.support.v7.widget.RecyclerView
                                android:layout_width="match_parent"
                                android:layout_height="0dp"
                                android:id="@+id/lookingForList" app:layout_constraintTop_toTopOf="parent"
                                app:layout_constraintStart_toStartOf="parent"
                                app:layout_constraintEnd_toEndOf="parent"
                                app:layout_constraintBottom_toBottomOf="parent"/>

Expected behavior

Display the button ADD_INTEREST in my flex layout

Version of the flexbox library

0.3.2

[sheckspir]

I checked this issue on version 2.0.1 and everything works fine The example of code: https://github.com/sheckspir/PetOpenSource/tree/master/app/src/main/java/ru/sheckspir/petapplication/fragments/flexbox