Map - XForms - center on my position

Hi, I've came accross almost all I got to implement in my app.

Except that : when the map is shown, I have to center the view on my position. Not a pin or anything else.
I have to reproduce what happens when i hit the button "location"

http://android-ui-utils.googlecode.com/hg-history/4eaad0f953d8a224eda3ea2e882943cb7171d154/asset-studio/src/res/clipart/icons/mylocation.svg

How can I do that ? Do I have to implement that in my map renderer ? Is there a CenterViewOnUser method or something close ?

Thanks guys. Have all a good day