activity_expand_view.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:context=".view.ExpandViewActivity"
        tools:background="@color/colorPrimary">

        <androidx.cardview.widget.CardView
            android:id="@+id/card_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:cardBackgroundColor="@color/red"
            app:cardCornerRadius="10dp"
            android:elevation="10dp"
            android:layout_margin="20dp">

            <include android:id="@+id/intro"
                layout="@layout/layout_1"/>

            <include android:id="@+id/detail"
                layout="@layout/layout_2" />

        </androidx.cardview.widget.CardView>

    </androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>