Threema-Android-mirror/app/src/main/res/layout/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:windowBackground">

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

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

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

			<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:textColor="@null"
				android:textAppearance="@style/Threema.Material.Header.Big.Text"
				android:text=""/>
			<!-- textColor="@null" -> https://stackoverflow.com/a/45198884 -->

		</FrameLayout>

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

	</FrameLayout>

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