Hi,
By default listener will not use 8080 port. It uses 1521 port.Probably u might have installed apache from oracle software which might be using 8080 port.Please uninstall or stop apache service

And also check your listener configuratio in listener.ora file, there u would find the keyword PORT. Check the no after the word

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = abcd)(PORT = 1521)(queuesize=200))