res/layout/notification_history.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2020 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.
-->

<androidx.core.widget.NestedScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/scroll"
    android:background="?android:attr/colorBackgroundFloating"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

        <com.android.settingslib.widget.MainSwitchBar
            android:id="@+id/main_switch_bar"
            android:visibility="invisible"
            android:layout_height="wrap_content"
            android:layout_width="match_parent" />

        <LinearLayout
            android:id="@+id/history_off"
            android:visibility="gone"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="164dp"
            android:orientation="vertical">

            <ImageView
                android:id="@+id/history_image"
                android:layout_width="67dp"
                android:layout_height="67dp"
                android:layout_gravity="center_horizontal"
                android:scaleType="fitCenter"
                android:focusable="false"
                android:tint="?android:attr/colorControlNormal"
                android:src="@drawable/ic_history" />

            <TextView
                android:id="@+id/history_off_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="48dp"
                android:layout_marginStart="48dp"
                android:layout_marginEnd="48dp"
                android:layout_gravity="center_horizontal"
                android:gravity="center"
                android:focusable="true"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:fontFamily="@*android:string/config_headlineFontFamilyMedium"
                android:text="@string/notification_history_off_title_extended" />

            <TextView
                android:id="@+id/history_off_summary"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="48dp"
                android:layout_marginEnd="48dp"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"
                android:textAlignment="center"
                android:focusable="true"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:textColor="?android:attr/textColorSecondary"
                android:text="@string/notification_history_off_summary" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/history_on_empty"
            android:visibility="gone"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="164dp"
            android:orientation="vertical">
            <ImageView
                android:id="@+id/history_image_on"
                android:layout_width="67dp"
                android:layout_height="67dp"
                android:layout_gravity="center_horizontal"
                android:scaleType="fitCenter"
                android:focusable="false"
                android:tint="?android:attr/colorControlNormal"
                android:src="@drawable/ic_history" />
            <TextView
                android:id="@+id/history_toggled_on_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="48dp"
                android:layout_marginStart="48dp"
                android:layout_marginEnd="48dp"
                android:layout_gravity="center_horizontal"
                android:gravity="center"
                android:focusable="true"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:fontFamily="@*android:string/config_headlineFontFamilyMedium"
                android:text="@string/history_toggled_on_title" />

            <TextView
                android:id="@+id/history_toggled_on_summary"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/history_off_title"
                android:layout_marginStart="48dp"
                android:layout_marginEnd="48dp"
                android:layout_marginTop="16dp"
                android:layout_gravity="center_horizontal"
                android:textAlignment="center"
                android:focusable="true"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:textColor="?android:attr/textColorSecondary"
                android:text="@string/history_toggled_on_summary" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/history_on"
            android:visibility="gone"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:padding="16dp">

            <LinearLayout
                android:id="@+id/snoozed_list"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:layout_marginBottom="28dp">
                <TextView
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/notification_history_snooze"
                    android:textColor="?android:attr/textColorPrimary"
                    android:textAppearance="@style/TextAppearance.HomepageCardTitle"
                    android:paddingBottom="16dp" />

                    <androidx.recyclerview.widget.RecyclerView
                        android:id="@+id/notification_list"
                        android:background="@drawable/rounded_bg"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:clipChildren="true"
                        android:scrollbars="none"/>
            </LinearLayout>

            <LinearLayout
                android:id="@+id/recently_dismissed_list"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:layout_marginBottom="28dp">

                <TextView
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/notification_history_dismiss"
                    android:textColor="?android:attr/textColorPrimary"
                    android:textAppearance="@style/TextAppearance.HomepageCardTitle"
                    android:paddingBottom="16dp" />
                <androidx.recyclerview.widget.RecyclerView
                        android:id="@+id/notification_list"
                        android:background="@drawable/rounded_bg"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:clipChildren="true"
                        android:scrollbars="none"/>
            </LinearLayout>

            <LinearLayout
                android:id="@+id/today_list"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">
                <TextView
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/notification_history_today"
                    android:textColor="?android:attr/textColorPrimary"
                    android:textAppearance="@style/TextAppearance.HomepageCardTitle"
                    android:paddingBottom="16dp" />
                <LinearLayout
                    android:id="@+id/apps"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    android:background="@drawable/rounded_bg">
                    <!-- app based recycler views added here -->
                </LinearLayout>
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</androidx.core.widget.NestedScrollView>