android/app/src/main/res/layout/activity_device_set_chooser.xml

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

<android.support.design.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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".DeviceSetChooserActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/device_set_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/button_add_device_set"
        android:contentDescription="@string/action_add_pdf"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_gravity="bottom|right"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_add_white_24dp"
        app:borderWidth="0dp"
        app:fabSize="normal"
        app:layout_anchor="@id/device_set_list"
        app:layout_anchorGravity="bottom|end" />

</android.support.design.widget.CoordinatorLayout>