Quelle  fragment_contacts.xml

<?xml version="1.0" encoding="utf-8"?>
<ch.threema.app.ui.LockingSwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/swipe_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?android:attr/colorBackground">

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

        <ListView
            android:id="@android:id/list"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:clipToPadding="false"
            android:fastScrollAlwaysVisible="true"
            android:fastScrollEnabled="true"
            android:footerDividersEnabled="true"
            android:listSelector="@drawable/listitem_background_selector"
            android:scrollbarStyle="outsideOverlay" />

        <FrameLayout
            android:id="@+id/initial_sticky_layout"
            android:layout_width="wrap_content"
            android:layout_height="@dimen/listitem_contact_height"
            android:background="?android:attr/colorBackground"
            android:paddingLeft="16dp">

            <ch.threema.app.emojis.EmojiTextView
                android:id="@+id/initial_sticky"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="left|center_vertical"
                android:text=""
                android:textAppearance="@style/Threema.Material.Header.Big.Text"
                android:textColor="@null" />
            <!-- textColor="@null" -> https://stackoverflow.com/a/45198884 -->

        </FrameLayout>

        <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
            android:id="@+id/floating"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|right"
            android:layout_margin="@dimen/floating_button_margin"
            android:clickable="true"
            android:contentDescription="@string/menu_add_contact"
            android:text="@string/menu_add_contact"
            app:icon="@drawable/ic_add_white_24dp"
            app:layout_anchor="@id/pager"
            app:layout_anchorGravity="bottom|right|end"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent" />

    </FrameLayout>

</ch.threema.app.ui.LockingSwipeRefreshLayout>