Use the official demo, modify widgets.xml and add a container before the scrollpane like this:
<tabitem label="List" style="layout:borderlayout;">
<_enabled>@{bList}</_enabled>
<container><text>testtext-1<text><text>testtext-2</text></container>
<scrollPane>
<list>
<listitem>
<text>Stone</text>
<picture>stone.png</picture>
</listitem>
<listitem>
<text>Leaf</text>
</listitem>
<listitem>
<picture>scissors.png</picture>
<text>Scissors</text>
</listitem>
<listitem>
<textarea>A paragraph long enough to take up two lines</textarea>
</listitem>
</list>
</scrollPane>
</tabitem>
Run it. Only container part display and the scrollpane lost, in debug mode, the scrollpane is initialized but the doLayout method not invoked.
Modify the xml again and put the scrollpane in a container, the scrollpane is back, but if the listitems are more enough and go outside the screen, the scrollpane can not scroll with press the DOWN_KEY, but the listitems outside screen can be selected.

