Media control with the xcover button on samsung smartphones.
If a headset is plugged in or conected to the cell phone, the functionality dependens on the duration of the button press:
| Duration | Action |
|---|---|
| 1 sec | Play / Pause |
| 3 sec | Next Song |
| 6 sec | Previous Song |
| > 6 sec | None |
https://docs.samsungknox.com/dev/knox-sdk/hardware-key-remapping-isv.htm