IssueTracker

hello. this is my Fragment XML view:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="match_parent"
    tools:context=".Fragments.EmployeesNewFragment">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/newEmployeesRecyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="gone"
        tools:listitem="@layout/custom_employee_new_recyclerview_item" />

    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        android:id="@+id/search"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentBottom="true"
        android:layout_gravity="center_horizontal"
        android:layout_marginEnd="20dp"
        android:layout_marginBottom="10dp"
        android:backgroundTint="@color/toast_green"
        android:text="search"
        android:textSize="@dimen/normal_font_size"
        android:visibility="invisible"
        app:icon="@drawable/ic_search_plan"
        app:iconGravity="end" />

    <com.google.android.material.card.MaterialCardView
        android:id="@+id/noEmployeeLayout"
        style="@style/customCardViewWithNormalBackground"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/addEmployee"
        android:visibility="visible"
        app:cardElevation="0dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginStart="20dp"
            android:layout_marginEnd="20dp"
            android:layout_marginBottom="20dp"
            android:gravity="center"
            android:orientation="vertical"
            android:weightSum="8">

            <com.airbnb.lottie.LottieAnimationView
                android:id="@+id/animationView"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="7"
                app:lottie_autoPlay="true"
                app:lottie_loop="true"
                app:lottie_rawRes="@raw/nothing_found" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_gravity="center"
                android:layout_weight="1"
                android:fontFamily="@font/iransans"
                android:gravity="center"
                android:text="Nothing Found!"
                android:textAlignment="center"
                android:textSize="@dimen/title_font_size" />

        </LinearLayout>
    </com.google.android.material.card.MaterialCardView>

    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        android:id="@+id/addEmployee"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true"
        android:layout_gravity="center_horizontal"
        android:layout_marginStart="20dp"
        android:layout_marginBottom="10dp"
        android:backgroundTint="@color/toast_green"
        android:text="Add New Employee"
        android:textSize="@dimen/normal_font_size"
        app:icon="@drawable/ic_add_user"
        app:iconGravity="end" />

</RelativeLayout>

and my fragment code is:

public class EmployeesNewFragment extends Fragment {

    CardView noEmployeeLayout;
    RecyclerView newEmployeesRecyclerView;
    ArrayList<EmployeeModal> newEmployeesList;
    EmployeesNewRecyclerViewAdapter newEmployeeAdapter;
    ExtendedFloatingActionButton addEmployee;

    DBHandler dbHandler;

    public EmployeesNewFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_employees_new, container, false);

        addEmployee = view.findViewById(R.id.addEmployee);
        newEmployeesRecyclerView = view.findViewById(R.id.newEmployeesRecyclerView);
        noEmployeeLayout = view.findViewById(R.id.noEmployeeLayout);

        dbHandler = new DBHandler(requireActivity());
        newEmployeesList = dbHandler.readNewEmployees(ConfirmPlanEmployeeActivity.planId);

        newEmployeeAdapter = new EmployeesNewRecyclerViewAdapter(newEmployeesList,requireActivity());
        newEmployeesRecyclerView.setLayoutManager(new LinearLayoutManager(requireActivity()));
        newEmployeesRecyclerView.setAdapter(newEmployeeAdapter);

        newEmployeesRecyclerView.addRecyclerListener(holder -> {
            if (newEmployeesList.size() > 0) {
                newEmployeesRecyclerView.setVisibility(View.VISIBLE);
                noEmployeeLayout.setVisibility(View.GONE);
            } else {
                newEmployeesRecyclerView.setVisibility(View.GONE);
                noEmployeeLayout.setVisibility(View.VISIBLE);
            }
        });

        if (newEmployeesList.size() > 0) {
            newEmployeesRecyclerView.setVisibility(View.VISIBLE);
            noEmployeeLayout.setVisibility(View.GONE);
        } else {
            newEmployeesRecyclerView.setVisibility(View.GONE);
            noEmployeeLayout.setVisibility(View.VISIBLE);
        }

        newEmployeesRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
                if (dy < 0)
                    addEmployee.hide();
                else if (dy > 0) {
                    addEmployee.show();
                }
                if (!newEmployeesRecyclerView.canScrollVertically(1) && addEmployee.isShown())
                    addEmployee.hide();
            }

        });

        //some other unrelated code

        return view;
    }

and my adapter is nothing special just some TextViews getting texts. and That's it.

the purpose: while we scroll up in recyclerview, our ExtendedFloatingActionButton which is addEmployee should addEmployee.hide(); and when scroll up should addEmployee.show(); which doing perfectly fine but at the last couple of lines where:

if (!newEmployeesRecyclerView.canScrollVertically(1) && addEmployee.isShown())
                    addEmployee.hide();

our EFAB should hide again when we reach at the end of RecyclerView to avoid collision and overlaping the recyclerView

the problem: when ever we reach to the end of scroll and addEmployee.hide(); happens recyclerview suddenly jumps and scrolls up to a random place on the list which is wierd.

seems like a bug to me, cause I replaced my hide/show codes with a lot of different options including setVisibility and all of them works fine. but the hide/show of FAB or EFAB cause that scroll jump and it's really annoying.

Thanks for reading.