move the fastscroller handle in a separate layout file

            android:paddingLeft="@dimen/normal_margin"

            android:paddingStart="@dimen/normal_margin">

            <ImageView

                android:id="@+id/filepicker_fastscroller_handle"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_gravity="end"

                android:alpha="0"

                android:background="@drawable/fastscroller_handle_vertical"/>

            <include layout="@layout/fastscroller_handle_vertical"/>

        </com.simplemobiletools.commons.views.FastScroller>

    </RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<merge

    xmlns:android="http://schemas.android.com/apk/res/android">

    <ImageView

        android:id="@+id/filepicker_fastscroller_handle"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="end"

        android:alpha="0"

        android:background="@drawable/fastscroller_handle_vertical"/>

</merge>