title: Custom Notification Layout for jelly bean android
body: <p>I have a custom notification layout. in which i have some buttons . i want to change this play icon to pause when press once. if press again then change pause to play icon.
  actually i want to develop a music app . where music control buttons  will be in the notification bar such as play, pause, next etc. that's all</p>
  
  <p>I have done all of this except "change play button to pause when press once. if press again then change pause to play ." How i change a button image after press on notification bar.</p>
  
  <p>Anyone please help me ..</p>