I can't scroll my layout in a multi window in Nougat 7.0

Question

To support multi-window mode in nougat 7.0, I need to design my entire layout with the parent scrollview, or is there any other way to make it work. I need to change my entire old design to scrollview with a minimum width and height to support a multi-window. In the Android developer tutorial, I got this code, there is no concept of scrolling in this, and I cannot scroll unless I use scrollview.

<activity android:name=".MyActivity">
<layout android:defaultHeight="500dp"
      android:defaultWidth="600dp"
      android:gravity="top|end"
      android:minHeight="450dp"
      android:minWidth="300dp" />
</activity>