java/com/android/dialer/main/impl/res/layout/main_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2017 The Android Open Source Project
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License
  -->
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/root_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

  <!-- MainToolbar -->
  <include
      android:id="@+id/toolbar"
      layout="@layout/toolbar_layout"/>

  <android.support.design.widget.CoordinatorLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/coordinator_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_below="@+id/toolbar"
      android:layout_above="@+id/bottom_nav_bar">

    <!-- Holds SpeedDial, Call Log, Contacts, Voicemail and Search fragments -->
    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <FrameLayout
        android:id="@+id/search_fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <ImageView
        android:id="@+id/toolbar_shadow"
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:scaleType="fitXY"
        android:src="@drawable/search_shadow"
        android:visibility="gone"/>

    <com.android.dialer.widget.DialerFloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:layout_gravity="end|bottom"
        android:src="@drawable/quantum_ic_dialpad_white_24"
        android:contentDescription="@string/dialpad_button_content_description"
        app:backgroundTint="?android:attr/colorAccent"/>
  </android.support.design.widget.CoordinatorLayout>

  <!-- BottomNavBar -->
  <include
      android:id="@+id/bottom_nav_bar"
      layout="@layout/bottom_nav_bar_layout"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"/>

  <!-- Holds Dialpad fragment -->
  <FrameLayout
      android:id="@+id/dialpad_fragment_container"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:elevation="10dp"/>

  <!-- TODO(calderwoodra): investigate what this is for and why we want it. -->
  <!-- Host container for the contact tile drag shadow -->
  <FrameLayout
      android:id="@+id/activity_overlay"
      android:layout_width="match_parent"
      android:layout_height="match_parent">
    <ImageView
        android:id="@+id/contact_tile_drag_shadow_overlay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:importantForAccessibility="no"
        android:visibility="gone"/>
  </FrameLayout>
</RelativeLayout>