I did request the EB.Application.userFolder variable, and put my mp3 file there.
The weird thing is, when I request the config file, this is the result: "/data/user/0/com.symbol.enterprisebrowser/rhodata/apps/rhoconfig.txt". But this file (and the rhodata folder) aren't even there. Or am I looking at the wrong place.
The config file (which holds the start url) is here: "/TC57/Android/data/com.symbol.enterprisebrowser/config.xml"
But I'm not sure what the absolute path would be for the Mediaplayer.start
EB.Mediaplayer.start(EB.Application.userFolder + 'error.mp3');