res/layout/settings_main_dashboard.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2014, 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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <FrameLayout
        android:id="@+id/search_bar_container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?android:attr/colorPrimary">
        <androidx.cardview.widget.CardView
            android:id="@+id/search_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/search_bar_margin"
            app:cardCornerRadius="@dimen/search_bar_corner_radius"
            app:cardBackgroundColor="?android:attr/colorBackground"
            app:cardElevation="2dp">
            <Toolbar
                android:id="@+id/search_action_bar"
                android:layout_width="match_parent"
                android:layout_height="@dimen/search_bar_height"
                android:background="?android:attr/selectableItemBackground"
                android:contentInsetStartWithNavigation="64dp"
                android:navigationIcon="@drawable/ic_search_24dp"
                android:theme="?android:attr/actionBarTheme">
                <TextView
                    android:id="@+id/search_action_bar_title"
                    style="@style/TextAppearance.SearchBar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/search_menu" />
            </Toolbar>
        </androidx.cardview.widget.CardView>
    </FrameLayout>
    <FrameLayout
        android:id="@+id/main_content"
        android:layout_height="match_parent"
        android:layout_width="match_parent" />
</LinearLayout>