FossifyGallery/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/directories_coordinator"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.simplemobiletools.commons.views.MySearchMenu
        android:id="@+id/main_menu"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <RelativeLayout
        android:id="@+id/directories_holder"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <com.simplemobiletools.commons.views.MyTextView
            android:id="@+id/directories_switch_searching"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="?attr/selectableItemBackground"
            android:gravity="center"
            android:padding="@dimen/activity_margin"
            android:text="@string/switch_to_file_search"
            android:visibility="gone" />

        <com.simplemobiletools.commons.views.MyTextView
            android:id="@+id/directories_empty_placeholder"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/directories_switch_searching"
            android:alpha="0.8"
            android:gravity="center_horizontal"
            android:paddingStart="@dimen/activity_margin"
            android:paddingTop="@dimen/activity_margin"
            android:paddingEnd="@dimen/activity_margin"
            android:text="@string/no_media_with_filters"
            android:textSize="@dimen/bigger_text_size"
            android:textStyle="italic"
            android:visibility="gone" />

        <com.simplemobiletools.commons.views.MyTextView
            android:id="@+id/directories_empty_placeholder_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/directories_empty_placeholder"
            android:layout_centerHorizontal="true"
            android:background="@drawable/ripple_all_corners"
            android:padding="@dimen/activity_margin"
            android:text="@string/change_filters_underlined"
            android:textSize="@dimen/bigger_text_size"
            android:visibility="gone" />

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

            <com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller
                android:id="@+id/directories_fastscroller"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:supportSwipeToRefresh="true">

                <com.simplemobiletools.commons.views.MyRecyclerView
                    android:id="@+id/directories_grid"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layoutAnimation="@anim/layout_animation"
                    android:scrollbars="none"
                    app:layoutManager="com.simplemobiletools.commons.views.MyGridLayoutManager"
                    app:spanCount="@integer/directory_columns_vertical_scroll" />

            </com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller>
        </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
    </RelativeLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>