title: Not closeable app
body: <p>I am developing an app that will be used on conferences for email signup. The app will run on a tablet that will just sit on a table. My goal is to create an app that can not be closed. Is it possible to use the onDestroy() callback and just start the activity if someone closes the app? Or is there some better solution to my problem. (Suggestions for att rooted device can be accepted). </p>