Android Question keyvaluestore limitation question

hi i need only to know if keyvaluestore have a character limitation?
i want to save url´s like this
https://fbcdn-profile-a.akamaihd.ne...792_758162660880619_4072345100765266674_n.jpg

get from facebook users.
this is only example, have users with + characters

i can, i dont go have problem with this?