#!/bin/bash
# (C) 03/11/2012, Andrea Peluso (http://www.sya54m.eu)
# 0.1.1 (04/05/2013) - aggiunte nuove webradio
# 0.2.0 (07/04/2015) - aggiornati url webradio, aggiunto controllo player, cambiato dialogo di chiusura

if [ -x /usr/bin/mplayer ]; then
PLAYER="mplayer"
elif [ -x /usr/bin/cvlc ]; then
PLAYER="cvlc"
else
kdialog --error "No player found in the system" --caption aradio --icon kmix
exit 1
fi
while [ true ]
do
STATION=$(kdialog --radiolist "Select the Radio Station" a "Kiss Kiss" on b "New Jersey Radio" off c "Azure Radio Blues" off d "Smooth Jazz" off e "Classical Radio" off f "Kickin'Country" off g "Best Blues Radio" off h "Funky Blues" off i "Virgin Radio" off j "Radio Caroline" off k "Oldies Radio" off --caption aradio --icon kmix)
if [ "$STATION" = "a" ]; then
URL="http://wma08.fluidstream.net:4610/"
elif [ "$STATION" = "b" ]; then
URL="http://8303.live.streamtheworld.com/WKXWFMAAC"
elif [ "$STATION" = "c" ]; then
URL="http://streaming204.radionomy.com:80/Azur-BLUES"
elif [ "$STATION" = "d" ]; then
URL="http://streaming207.radionomy.com:80/lovesmoothjazzcom"
elif [ "$STATION" = "e" ]; then
URL="http://streams.primesite7.com:8000/11Radio-Classical.mp3"
elif [ "$STATION" = "f" ]; then
URL="http://192.95.36.32:9909/;?icy=http"
elif [ "$STATION" = "g" ]; then
URL="http://streaming202.radionomy.com:80/BestBluesIKnow"
elif [ "$STATION" = "h" ]; then
URL="http://streaming203.radionomy.com:80/FunkyBlues"
elif [ "$STATION" = "i" ]; then
URL="http://shoutcast.unitedradio.it:1301"
elif [ "$STATION" = "j" ]; then URL="http://sc3.radiocaroline.net:8030"
elif [ "$STATION" = "k" ]; then URL="http://streaming204.radionomy.com:80/OldiesInternetRadioPlus"

else
kdialog --passivepopup "Thanks for using.\n(C) 2012-2015, Andrea Peluso." --caption aradio --icon kmix
exit 0
fi
$PLAYER $URL &
kdialog --msgbox "Press Ok to stop broadcast" --caption aradio --icon kmix
killall $PLAYER
done

I use mpv instead of mplayer:

#!/bin/bash
# Idea: Andrea Peluso (http://sya54m.altervista.org)

while [ true ]
do
STAZIONE=$(kdialog --radiolist "Radiostream auswählen" a "Radio 1" on b "Fritz" off c "Info" off --caption aradio --icon kmix)
if [ "$STAZIONE" = "a" ]; then
URL="http://radioeins.de/livemp3"
elif [ "$STAZIONE" = "b" ]; then
URL="http://fritz.de/livemp3"
elif [ "$STAZIONE" = "c" ]; then
URL="http://inforadio.de/livemp3"
else
kdialog --passivepopup "Und Tschüß" 3 --caption aradio --icon kmix
exit 0
fi
mpv $URL &
kdialog --msgbox "OK um zurück zur Radioliste zu kommen." --caption aradio --icon kmix
killall mpv
done

good idea the "--passivepopup";-)