anotherim/src/main/res/layout/activity_choose_contact.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <include android:id="@+id/toolbar"
            layout="@layout/toolbar" />

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

            <ListView
                android:id="@+id/choose_contact_list"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:divider="@android:color/transparent"
                android:dividerHeight="0dp"/>

            <android.support.design.widget.FloatingActionButton
                android:id="@+id/fab"
                app:backgroundTint="?colorPrimary"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="end|bottom"
                android:layout_margin="16dp"
                android:src="@drawable/ic_person_add_white_24dp"/>
        </FrameLayout>
    </LinearLayout>
</layout>