Hi there!

First of all I am sorry if I've opened a new topic about a knowm problem with a soution, but I can't find it (I'm new here!)

I was wondering if there is any app that locks your screen from the side button, but keeps the external keyboard active though.
I want to use the < > buttons to change songs in media player while driving and listening to music via the fm transmitter, so i'd rather prefere to lock the phone with the keyboard open and change the songs from the arrow buttons than to unlock it and change them using the touchscreen. I hate it because it's distracting my attention...
So, any ideas?

Thank you in advanced and have a nice day!