如何解决在xml布局中的RecyclerView上消失的小部件？

Question

I have a RecyclerView which consist of items which has a radioButton... I want to refresh my RecyclerView items data after 2 seconds with showing a loading widget and make RecylerView to scroll to first item, while user clicks on RadioButtons.

Everything is done right except loading and RecylerView widget Visiblity ...

Loading widget and RecyclerView Visiblity don't change.

This is My xml

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recy_billing"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="8dp"
            app:layout_constraintBottom_toTopOf="@+id/materialCardView7"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            />

        <com.airbnb.lottie.LottieAnimationView
            android:id="@+id/loading_order"
            android:layout_width="@dimen/loading"
            android:layout_height="@dimen/loading"
            android:layout_gravity="center"
            android:visibility="invisible"
            app:layout_constraintBottom_toTopOf="@id/materialCardView7"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:lottie_autoPlay="true"
            app:lottie_fileName="loading.json"
            app:lottie_loop="true" />

and this is my code..

public void updateAddressSelectionRecy() {

    try {

        mRecyBilling.setVisibility(View.GONE);
        mSelectAddressLoading.setVisibility(View.VISIBLE);
        mRecyBilling.getAdapter().notifyDataSetChanged();
        mRecyBilling.scrollToPosition(0);

        Thread.sleep(SLEEP_TIME);
        mRecyBilling.setVisibility(View.VISIBLE);
        mSelectAddressLoading.setVisibility(View.GONE);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

}

Answer 1

Call mRecyBilling.getAdapter().notifyDataSetChanged(); once again rigth before catch() block.

ie:

public void updateAddressSelectionRecy() {

    try {

        mRecyBilling.setVisibility(View.GONE);
        mSelectAddressLoading.setVisibility(View.VISIBLE);
        mRecyBilling.getAdapter().notifyDataSetChanged();
        mRecyBilling.scrollToPosition(0);

        Thread.sleep(SLEEP_TIME);
        mRecyBilling.setVisibility(View.VISIBLE);
        mSelectAddressLoading.setVisibility(View.GONE);
        mRecyBilling.getAdapter().notifyDataSetChanged();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}