However it is in Czech, try this link http://www.razdva.cz/mhd/ od public transport at Praha. From Anděl to Hradčany (station Malostranská) goes N°12 and 20 or to station Hradčanská only N°20. Karel
http://www.dp-praha.cz/idos/ConnForm.asp?tt=e&cl=E5 will give you all details of all Prague's tram's, metros, buses, trians and funicular's, in English.