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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    tools:context=".MainActivity">

    <com.bosphere.fadingedgelayout.FadingEdgeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:fel_edge="bottom"
        app:fel_size_bottom="90dp">

        <ScrollView
            android:id="@+id/scroll_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <com.jmedeisis.draglinearlayout.DragLinearLayout
                android:id="@+id/drag_linear_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:paddingBottom="90dp" />

        </ScrollView>

    </com.bosphere.fadingedgelayout.FadingEdgeLayout>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/floating_action_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|center_horizontal"
        android:layout_marginBottom="16dp"
        android:src="@drawable/ic_add"
        app:borderWidth="0dp"
        app:fabSize="normal" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>