Coordinator layout test with multiple static view and one scrollable header in between.

coordinator_scroll_sandwich.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <RelativeLayout
            android:id="@+id/topBar"
            android:layout_width="match_parent"
            android:layout_height="48dp"
            android:background="#000000"/>
    <androidx.coordinatorlayout.widget.CoordinatorLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@id/topBar"
            tools:context=".MainActivity">

        <com.google.android.material.appbar.AppBarLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fitsSystemWindows="true">

            <com.google.android.material.appbar.CollapsingToolbarLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:fitsSystemWindows="true"
                    app:layout_scrollFlags="scroll|snap|exitUntilCollapsed">
                <View
                        android:layout_width="match_parent"
                        android:layout_height="70dp"
                        android:background="@color/design_default_color_primary"/>
            </com.google.android.material.appbar.CollapsingToolbarLayout>

            <LinearLayout
                    android:id="@+id/container"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"
                    android:background="@color/colorAccent">
                <Button
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Change Size"
                        android:onClick="addATextView"/>
            </LinearLayout>

        </com.google.android.material.appbar.AppBarLayout>

        <androidx.core.widget.NestedScrollView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">

            <LinearLayout
                    xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical" tools:showIn="@layout/activity_main">
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="1"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="2"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="3"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="4"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="5"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="6"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="7"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="8"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="9"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="10"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
                <TextView
                        android:layout_width="match_parent"
                        android:layout_height="100dp"
                        android:text="11"
                        android:textSize="32sp"
                        android:textStyle="bold"
                        android:gravity="center"/>
            </LinearLayout>

        </androidx.core.widget.NestedScrollView>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

</RelativeLayout>