How to ensure zoom controls always shown on a MapView?
<p>I'm having awful problems with this. I have a MapView, in my activity I set the flag to show the zoom controls, and it works. But then the user navigates to another activity, comes back to the map, and the zoom controls have gone.</p>

<p>Is there a simple way to ensure the zoom controls are always present, or do I need to roll my own on top? Ideally I want to set up the zoom controls in a subclass of MapView to keep things simple. I suspect it's failing as the zoom controls are being set up at the wrong time, but when is the right time?</p>
