Back hardware button should pause application instead of exiting it


I am having a problem with my current application which play an audio stream. It is using the plugin Media and Background Mode.

When clicking on the home button, the application go to the background and the sound is still playing. It is normal.
But when I click on the Back hardware button, it does an exitApp(). The audio stop when going to the launchpad.

We have to open back the application to play the sound again.

Is it possible to change the behavior of this back button to a pause event instead?

Thanks a lot!