NoAdapterReference.diff

class MainActivityFragment : Fragment() {
  // Discard permanent reference to the adapter
- val adapter = MainRecyclerViewAdapter()
- 
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    return inflater.inflate(R.layout.fragment_activity_main, container, false)
  }
 
  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    // Recreate adapter instance every time after rotation now
-   recyclerView.adapter = adapter
+   recyclerView.adapter = MainRecyclerViewAdapter()
    recyclerView.layoutManager = LinearLayoutManager(activity!!)
  }
}