As documented, the "fixed" flag matters for dojox/mobile/ScrollableView only. There are two cases: a header/footer at the level of the entire application, and locally at the level of a given ScrollableView. You can find details here:
- local view header/footer: https://dojotoolkit.org/reference-guide/1.9/dojox/mobile/ScrollableView.html#view-header-footer-bar-example
- global application header/footer: https://dojotoolkit.org/reference-guide/1.9/dojox/mobile/ScrollableView.html#application-header-footer-bar-example
For the local case, you can add the fixed bar using the method ScrollableView.addFixedBar. For an example, see dojox/mobile/tests/test_dynamic-ScrollableView-vh-vf.html.
Hope this helps, Adrian