fragment_notes.xml

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



    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/swipe_to_refresh"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.core.widget.NestedScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fitsSystemWindows="true"
                android:layout_marginStart="8dp"
                android:layout_marginEnd="8dp">


                <include
                    android:id="@+id/title_layout"
                    layout="@layout/item_title_profile"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />


                <include
                    android:id="@+id/search_layout"
                    layout="@layout/item_search_notes"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/title_layout" />

                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recycler_view"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:clipToPadding="false"
                    android:paddingTop="10dp"
                    android:layoutAnimation="@anim/layout_animation"
                    android:paddingBottom="60dp"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/search_layout" />

            </androidx.constraintlayout.widget.ConstraintLayout>

        </androidx.core.widget.NestedScrollView>

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>


</layout>

item_row_notes.xml

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    app:cardBackgroundColor="@color/colorLightGrey"
    app:cardCornerRadius="8dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:id="@+id/imageView4"
            android:layout_width="match_parent"
            android:layout_height="180dp"
            android:scaleType="centerCrop"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:srcCompat="@tools:sample/backgrounds/scenic" />

        <TextView
            android:id="@+id/textView15"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:fontFamily="@font/poppins_regular"
            android:includeFontPadding="false"
            android:lineSpacingExtra="2dp"
            android:lineSpacingMultiplier="1.2"
            android:paddingStart="10dp"
            android:paddingTop="4dp"
            android:paddingEnd="10dp"
            android:minLines="2"
            android:paddingBottom="16dp"
            android:text="@string/language_subtitle"
            android:textSize="12sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView16">

        </TextView>

        <TextView
            android:id="@+id/textView16"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:fontFamily="@font/poppins_bold"
            android:includeFontPadding="false"
            android:lineSpacingExtra="2dp"
            android:maxLines="1"
            android:padding="5dp"
            android:paddingStart="10dp"
            android:paddingEnd="10dp"
            android:text="DEC 20, 2015"
            android:textSize="16sp"
            android:textColor="@color/black"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/imageView4">

        </TextView>


        <ImageView
            android:id="@+id/share"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/background_notes_edit"
            android:padding="10dp"
            android:src="@drawable/ic_share_15dp"
            android:layout_marginEnd="15dp"
            app:layout_constraintBottom_toBottomOf="@+id/imageView4"
            app:layout_constraintEnd_toStartOf="@+id/edit"
            app:layout_constraintTop_toBottomOf="@+id/imageView4"
            app:layout_constraintVertical_bias="0.485">

        </ImageView>

        <ImageView
            android:id="@+id/edit"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="20dp"
            android:background="@drawable/background_notes_edit"
            android:padding="10dp"
            android:src="@drawable/ic_edit_pen"
            app:layout_constraintBottom_toBottomOf="@+id/imageView4"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/imageView4">

        </ImageView>

    </androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>

Note.kt

@Entity
data class Note(
    @PrimaryKey
    val userNotesId: Int,
    val pinLocation: String,
    val pinNote: String? = null,
    val user: Int? = null,
    val base64Png: String? = null,
    var lastRefreshed: Date? = null
)

NotesAdapter.kt

open class NotesAdapter : RecyclerView.Adapter<NotesAdapter.DataViewHolder>(), Filterable {

    var notesList: ArrayList<Note> =  ArrayList()
    var notesListFiltered: ArrayList<Note> =  ArrayList()


    var onItemClick: ((Note) -> Unit)? = null

    inner class DataViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        init {
            itemView.setOnClickListener {
                onItemClick?.invoke(notesListFiltered[adapterPosition])
            }
        }

        fun bind(result: Note) {
            itemView.textView15.text = result.pinLocation
//            itemView.textView16.text = result.pinNote

            //decode base64 string to image
            val decodedString: ByteArray = Base64.decode(result.base64Png, Base64.DEFAULT)
            val decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.size)
            itemView.imageView4.setImageBitmap(decodedByte)
            itemView.imageView4.scaleType = ImageView.ScaleType.CENTER_CROP

//            Glide.with(itemView.imageView4.context).load(result.base64Png).into(itemView.imageView4)

            Log.e("bind: ", result.pinLocation)

        }
    }



    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =  DataViewHolder(
        LayoutInflater.from(parent.context).inflate(
            R.layout.item_row_notes, parent,
            false
        )
    )

    override fun onBindViewHolder(holder: DataViewHolder, position: Int) {
        holder.bind(notesListFiltered[position])
    }

    override fun getItemCount(): Int = notesListFiltered.size


    fun addData(list: List<Note>) {
        notesList = list as ArrayList<Note>
        notesListFiltered = notesList
        notifyDataSetChanged()
    }


    override fun getFilter(): Filter {
        return object : Filter() {
            override fun performFiltering(constraint: CharSequence?): FilterResults {
                val charString = constraint?.toString() ?: ""
                if (charString.isEmpty()) notesListFiltered = notesList else {
                    val filteredList = ArrayList<Note>()
                    notesList
                        .filter { it.pinLocation.contains(constraint!!) }
                        .forEach { filteredList.add(it) }
                    notesListFiltered = filteredList

                    Log.e( "perform t1: ",filteredList.size.toString() )
//                    it.pinNote!!.toLowerCase(Locale.ROOT).contains(charString.toLowerCase(
//                        Locale.ROOT
//                    )
//                    ) or
                }
                return FilterResults().apply { values = notesListFiltered }
            }

            override fun publishResults(constraint: CharSequence?, results: FilterResults?) {

                notesListFiltered = if(results?.values == null)
                    ArrayList<Note>()
                else
                    results.values as ArrayList<Note>
                notifyDataSetChanged()

                Log.e( "performFiltering:1 ","called"+ notesListFiltered.size )

//                notesListFiltered = results?.values as ArrayList<Note>
//                notifyDataSetChanged()
            }
        }
    }

NotesFragment.kt

@AndroidEntryPoint
class NotesFragment : Fragment(), SwipeRefreshLayout.OnRefreshListener , SearchView.OnQueryTextListener {
    companion object {
        val TAG = NotesFragment::class.qualifiedName
    }

    private val notesViewModel: NotesViewModel by viewModels()

    private var _binding: FragmentNotesBinding? = null
    private val binding get() = _binding!!
    private lateinit var notesAdapter: NotesAdapter

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = DataBindingUtil.inflate<ViewDataBinding>(
            inflater, R.layout.fragment_notes, container, false
        ) as FragmentNotesBinding?
        val view = binding.root
        setUpViews()
        doNotesObserveWork()
        return view
    }


    private fun setUpViews() {


        _binding!!.titleLayout.findViewById<TextView>(R.id.toolbar_title).text =
            getString(R.string.notes)

        _binding!!.recyclerView.layoutManager = LinearLayoutManager(
            activity,
            LinearLayoutManager.VERTICAL, false
        )
        notesAdapter = NotesAdapter()
        _binding!!.recyclerView.adapter = notesAdapter

        notesViewModel.getAllNotes(false)
        _binding!!.swipeToRefresh.setOnRefreshListener(this)
        _binding!!.searchLayout.findViewById<SearchView>(R.id.search_view).setOnQueryTextListener(this)


    }

    private fun doNotesObserveWork() {

        notesViewModel.notes.observe(viewLifecycleOwner, {

            when (it.status) {
                Status.SUCCESS -> {
                    setRefreshStatus(false)

                    notesAdapter.addData(it.data!!)
                    _binding!!.recyclerView.scheduleLayoutAnimation()

                }
                Status.LOADING -> {
//                    binding.loginButton.isEnabled = false
//                    binding.progressBar.visibility = View.VISIBLE
                }
                Status.ERROR -> {
                    setRefreshStatus(false)
                    //Handle Error
//                    Toast.makeText(this, it.message, Toast.LENGTH_LONG).show()
//                    Log.d("error", it.toString())
//                    binding.loginButton.isEnabled = true
//                    binding.progressBar.visibility = View.INVISIBLE
                }
            }


        })

    }

    override fun onRefresh() {

        if (_binding!!.swipeToRefresh.isRefreshing) {

            notesViewModel.getAllNotes(true)

        }

    }

    private fun setRefreshStatus(status: Boolean) {

        _binding!!.swipeToRefresh.isRefreshing = status

    }

    override fun onQueryTextSubmit(query: String?): Boolean {

        notesAdapter.getFilter().filter(query)
        return false

    }

    override fun onQueryTextChange(newText: String?): Boolean {

        notesAdapter.getFilter().filter(newText)

        return false;

    }


}

NotesViewMode.kt

class NotesViewModel  @ViewModelInject constructor(
    private val mainRepository: MainRepositoryImpl,
    private val networkHelper: NetworkHelper,
    private var preferencesHelper: PreferencesHelper
) : ViewModel() {

    private val _notes = MediatorLiveData<Resource<List<Note>>>()
    val notes: LiveData<Resource<List<Note>>>
    get() = _notes
    private var notesSource :LiveData<Resource<List<Note>>> = MutableLiveData()




    fun getAllNotes(forceRefresh:Boolean){
        viewModelScope.launch (Dispatchers.Main) {
            _notes.removeSource(notesSource)
            withContext(Dispatchers.IO){
                notesSource = mainRepository.getNotedWithCache(forceRefresh)

            }
            _notes.addSource(notesSource){

                Log.e( "doNotesObserveWork: ","cakked ")

                _notes.value = it
            }
        }
    }
}