res/layout/floating_actions.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
     Copyright (C) 2014 Google Inc.
     Licensed to 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.
-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom"
    android:orientation="vertical">

    <ImageButton
        android:id="@+id/compose_button"
        style="@style/FloatingActionButtonStyle" />

    <com.android.mail.ui.ActionableToastBar
        android:id="@+id/toast_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:background="@color/snack_bar_background_color"
        android:clickable="true"
        android:visibility="gone">

        <!-- These children are visible when description and action text fit on one line -->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/description_text"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:layout_weight="1"
                android:paddingTop="@dimen/snack_bar_margin_vertical"
                android:paddingBottom="@dimen/snack_bar_margin_vertical"
                android:textColor="@android:color/white"
                style="@style/SnackBarDescriptionTextStyle" />

            <TextView
                android:id="@+id/action_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:paddingTop="@dimen/snack_bar_margin_vertical"
                android:paddingBottom="@dimen/snack_bar_margin_vertical"
                android:textAllCaps="true"
                android:textColor="@color/snack_bar_action_text_color"
                style="@style/SnackBarActionTextStyle"/>
        </LinearLayout>

        <!-- These children are visible when description and action text require multiple lines -->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/multiline_description_text"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="@dimen/snack_bar_margin_horizontal"
                android:layout_marginRight="@dimen/snack_bar_margin_horizontal"
                android:paddingTop="@dimen/snack_bar_margin_vertical"
                android:textColor="@android:color/white" />

            <TextView
                android:id="@+id/multiline_action_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="?attr/selectableItemBackground"
                android:paddingTop="8dp"
                android:paddingBottom="@dimen/snack_bar_margin_vertical"
                android:textAllCaps="true"
                android:textColor="@color/snack_bar_action_text_color"
                style="@style/SnackBarActionTextStyle"/>
        </LinearLayout>

    </com.android.mail.ui.ActionableToastBar>

</LinearLayout>