title: How to add button to notifications in android?
body: <p>My app plays music and when users open notifications screen by swiping from the top of the screen ( or generally from the bottom right of the screen on tablets ), I want to present them a button to stop the currently playing music and start it again if they want.</p>
  
  <p>I am not planning to put a widget on the user's home screen, but just into notifications. How can I do this?</p>