Facebook Shimmer library with Paging 3 library

Question

In my app I load data from API which is using paginating so I have to use paging 3 library and I use facebook shimmer library to show shimmer effect when items are being loaded but the problem is always shimmer effect is shown even when items are completely loaded

ArticlePagingAdapter.kt

class ArticlePagingAdapter(private val listener: OnItemClickListener) :
    PagingDataAdapter<Article, ArticlePagingAdapter.ViewHolder>(ArticleDiffUtil()) {
    private val TAG = ArticlePagingAdapter::class.simpleName
    private lateinit var context: Context
    var showShimmer: Boolean = true

    inner class ViewHolder(itemView: View) :
        RecyclerView.ViewHolder(itemView), View.OnClickListener {
        lateinit var item: Article
        val shimmerLayout: ShimmerFrameLayout = itemView.shimmer_layout
        val articleImageView: ShapeableImageView = itemView.findViewById(R.id.article_image_view)
        val articleTitleTextView: TextView = itemView.findViewById(R.id.article_title_text_view)
        val articleEstimatedTextView: TextView =
            itemView.findViewById(R.id.article_estimated_read_time_text_view)
        val clockImageView: ImageView = itemView.findViewById(R.id.clock_icon)
    }
    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        if (showShimmer) {
            holder.shimmerLayout.startShimmer()
        } else {

            holder.shimmerLayout.stopShimmer()
            holder.shimmerLayout.setShimmer(null)
            holder.articleImageView.background = null
            holder.clockImageView.background = null
            holder.articleEstimatedTextView.background = null
            holder.articleTitleTextView.background = null

            val item = getItem(position)
            if (item != null) {
                Log.d(TAG, "position $position, isNull != null ")
                holder.item = item
                holder.articleTitleTextView.text = item.title
                holder.articleEstimatedTextView.text = (item.estimatedReadingTime.toString()

                val requestOptions = RequestOptions().transform(
                    CenterCrop(), RoundedCorners(
                        context.resources.getDimension(R.dimen.item_article_image_view_radius)
                            .toInt()
                    )
                )
                    Glide.with(context).load(item.imageUrl!!.toUri())
                        .placeholder(R.drawable.ic_article_placeholder).apply(requestOptions)
                        .into(holder.articleImageView)
                holder.clockImageView.setImageResource(R.drawable.ic_clock)
            } else {
                Log.d(TAG, "position $position, isNull= null ")
            }
        }
    }
}

ArticleFragmnet.kt

class LatestArticlesFragment : Fragment(), ArticlePagingAdapter.OnItemClickListener {
    val TAG = LatestArticlesFragment::class.simpleName
    lateinit var binding: FragmentLatestArticlesBinding
    

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {

    // some unrelated code 
   
        val adapter = ArticlePagingAdapter(this)
        binding.recyclerView.adapter = adapter

        viewModel.getArticles().observe(viewLifecycleOwner) { data ->
            lifecycleScope.launch {
                adapter.submitData(data)
                Log.d(TAG,"data ${data.toString()}")
                adapter.showShimmer = false
            }
        }
    }
}

ArticleFragmentViewModel.kt

class LatestArticlesFragmentViewModel @AssistedInject constructor(
    private val repository: ArticleRepository, ...) : ViewModel() {

    fun getArticles(): LiveData<PagingData<Article>> {
        currentArticles = repository.getArticlesStream().cachedIn(viewModelScope)
        return currentArticles?.asLiveData()!!
    }
}

item_article.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"
    style="@style/card_view_style"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="@dimen/small_margin"
    android:clipToPadding="false"
    android:paddingBottom="@dimen/_2sdp">

    <com.facebook.shimmer.ShimmerFrameLayout
        android:id="@+id/shimmer_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">


        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="@dimen/very_small_padding">

            <com.google.android.material.imageview.ShapeableImageView
                android:id="@+id/article_image_view"
                android:layout_width="0dp"
                android:layout_height="@dimen/_70sdp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintDimensionRatio="3:2"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toEndOf="@id/article_title_text_view"
                app:layout_constraintTop_toTopOf="parent"
                tools:src="@drawable/ic_icon" />

            <TextView
                android:id="@+id/article_title_text_view"
                style="@style/Widget.MyWidget.TextView.VerySmall.Bold"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/very_small_margin"
                android:layout_marginEnd="@dimen/very_small_margin"
                android:ellipsize="end"
                android:gravity="start"
                android:maxLines="2"
                android:minLines="2"
                android:textAlignment="textStart"
                android:textColor="?attr/textColor"
                app:layout_constraintBottom_toTopOf="@id/clock_icon"
                app:layout_constraintEnd_toStartOf="@id/article_image_view"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="@id/article_image_view"
                tools:text="This is a dummy title" />

            <TextView
                android:id="@+id/article_estimated_read_time_text_view"
                style="@style/Widget.MyWidget.TextView.VerySmall"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/very_small_margin"
                android:background="@color/shimmer_background"
                android:textColor="?attr/textColor"
                app:layout_constraintBottom_toBottomOf="@id/article_image_view"
                app:layout_constraintEnd_toEndOf="@id/article_title_text_view"
                app:layout_constraintStart_toEndOf="@id/clock_icon"
                app:layout_constraintTop_toBottomOf="@id/article_title_text_view"
                tools:text="5 min" />

            <ImageView
                android:id="@+id/clock_icon"
                android:layout_width="@dimen/_10sdp"
                android:layout_height="@dimen/_10sdp"
                android:background="@color/shimmer_background"
                app:layout_constraintBottom_toBottomOf="@id/article_estimated_read_time_text_view"
                app:layout_constraintEnd_toStartOf="@id/article_estimated_read_time_text_view"
                app:layout_constraintStart_toStartOf="@id/article_title_text_view"
                app:layout_constraintTop_toTopOf="@id/article_estimated_read_time_text_view"
                tools:src="@drawable/ic_clock" />

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

fragment_article_layout.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">

    <data>

    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/root_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?attr/articleBackground">

        <TextView
            android:id="@+id/article_text_view"
            style="@style/Widget.MyWidget.TextView.Large.Bold"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/medium_margin"
            android:text="@string/articles"
            android:textColor="?attr/textColor"
            app:layout_constraintStart_toStartOf="@id/left_guideline"
            app:layout_constraintTop_toTopOf="parent" />

        <View
            android:id="@+id/line_separator"
            style="@style/Divider"
            android:layout_marginStart="@dimen/_10sdp"
            app:layout_constraintBottom_toBottomOf="@id/article_text_view"
            app:layout_constraintEnd_toEndOf="@id/right_guideline"
            app:layout_constraintStart_toEndOf="@id/article_text_view"
            app:layout_constraintTop_toTopOf="@id/article_text_view"
            app:layout_constraintVertical_chainStyle="packed" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:background="@android:color/transparent"
            android:clipToPadding="false"
            android:orientation="vertical"
            android:paddingHorizontal="@dimen/small_padding"
            android:paddingTop="@dimen/small_padding"
            android:paddingBottom="@dimen/small_padding"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintTop_toBottomOf="@id/article_text_view"
            tools:itemCount="8"
            tools:listitem="@layout/item_article" />

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scaleType="fitXY"
            android:src="?attr/listFadeBackground"
            app:layout_constraintTop_toTopOf="@id/recycler_view" />

        <androidx.constraintlayout.widget.Guideline
            android:id="@+id/left_guideline"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_percent="0.03" />

        <androidx.constraintlayout.widget.Guideline
            android:id="@+id/right_guideline"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_percent="0.97" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>