Having an extremely frustrating time with this.
I've got my X8500BHS working, HTC One connected to it via MHL adapter to HDMI and USB1 (Pioneer CD-AH200 kit), downloaded Pioneer Appradio app, CarMediaPlayer, got the Carkeyboard as default typing input, tried App Connection as both iphone AV as well as "others", and still see nothing but a greyed out Apps button on the main screen.
Anyone who's got an Android phone going with app radio mode, how did you get it to work? What were your exact menu settings?