tests/ThemePlayground/res/layout/panel_samples.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2018 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.constraintlayout.widget.ConstraintLayout
    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">
    <ScrollView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

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

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorPrimary">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorPrimary"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorPrimaryDark">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorPrimaryDark"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorAccent">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorAccent"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorForeground">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorForeground"
                    android:textColor="?android:attr/textColorPrimaryInverse"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorBackground">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorBackground"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/windowBackground">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/windowBackground"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorBackgroundFloating">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorBackgroundFloating"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorActivatedHighlight">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorActivatedHighlight"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorControlActivated">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorControlActivated"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorControlHighlight">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorControlHighlight"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorControlNormal">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorControlNormal"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorError">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorError"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorButtonNormal">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorButtonNormal"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/colorFocusedHighlight">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/colorFocusedHighlight"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/panelColorBackground">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/panelColorBackground"/>
            </FrameLayout>
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="?android:attr/panelColorForeground">
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="android:attr/panelColorForeground"
                    android:textColor="?android:attr/textColorPrimaryInverse"/>
            </FrameLayout>
        </LinearLayout>
    </ScrollView>
    <include layout="@layout/menu_button"/>

</androidx.constraintlayout.widget.ConstraintLayout>