title: MediaController always show on Android
body: <p>I am using mediacontroller in my app, but it shows only for 3 seconds. I have searched a lot, but in every document I see only the show function, set time out, but it has no effect. How can I always show mediacontroller?</p>
  
  <p>I have tested <code>show(0)</code>, but it had no effect.</p>