title: Android: any way to check if "menu" button will exist when full-screen?
body: <p>My app has code to go full-screen where sensible to do so -- it's sensible on most Android 1 and 2 devices, but under Android 3 for example going full-screen loses the app menu button, and at the moment I don't implement my own menu button so users can't (or at least can't easily) get to the app's menu.</p>
  
  <p>At the moment I test for Android version &lt; 3, and go full-screen if that's the case, but I have users with Android 2 tablets (Viewsonic view pad 10s for example) where this isn't sensible (the Viewsonic user tells me she has to hold down the back button to get app's menu to appear).</p>
  
  <p>Is there a better way of testing whether going full-screen will lose the menu button? Or going full screen only if it's sensible to do so?</p>
  
  <p>Thanks for any help you can give. Let me know if you need more info or if the above isn't clear.</p>
  
  <p>Mark</p>