title: Is it possible to make a widget that can toggle Talkback in Android?
body: <p>I'm planning to use Android platform at a kind of public devices.
  And I think it's difficult for most people to turn off TalkBack.</p>
  
  <p>An widget button toggling the Talkback in home screen can solve the problem.</p>
  
  <p>Is it possible to make this widget? Does it need rooting?</p>