title: Android locked fullscreen
body: <p>Is it possible to lock fullscreen on Android? Basically hide toasts, hide home/back/switch, hide notification bar, make it so swiping from bottom or top doesn't work. </p>
  
  <p>Working on an idea that would benefit greatly from this. I know it's bad to do what I described, but it's aimed at very young children who randomly tap/drag and occasionally change your phone language to Chinese by accident. </p>