title: Can "Actions on Google" API open your app or show custom UI besides Conversational UI?
body: <p>Is it possible to display custom Activities / Fragments in "Actions on Google" (<a href="https://developers.google.com/actions/" rel="nofollow noreferrer">https://developers.google.com/actions/</a>) ? </p>
  
  <p>I see that they have their new Transaction API they want you to use, and they force you to use Google Payments API, or Google In-App purchases.  </p>
  
  <p>In their marketing videos, i don't see anything about opening regular apps from assistant, or using more customized UI, such as regular Android Activities.  (<a href="https://www.youtube.com/watch?v=ZvyrvowZ4wQ" rel="nofollow noreferrer">https://www.youtube.com/watch?v=ZvyrvowZ4wQ</a>) </p>
  
  <p>Can you:</p>
  
  <ol>
  <li><p>Link back to your Android App from Actions, and continue there? </p></li>
  <li><p>Use custom UI right in Actions?</p></li>
  </ol>