Hi, my name is Donald Brown. I have a brand new Android app called SD Radio. What it does, is it takes all of the music stored on your SD card and automatically plays it in a random order. There's no need to search for dolders and such. If you can turn on a radio, then you can use this app guaranteed!
I am also currently working on an update for the app which will allow for you to overlap songs to give you a smooth transition between the songs that are playing without any gaps. This app is really simple to use and there are absolutely no complicated settings to set for it.
All you do is just launch it and the music automatically begins playing. You can check it out here below.
http://www.sdradioapp.com