create a registration form for user to register the ip address

[AC Question]

i just create an app for wifi monitoring in android
user have to register first to connect into my wifi hotspot on mobile phone or my wifi from huddle.
i want to create a registration form that have input from user ip address and the option time given : 30 minute or 1 hour.
anyone can help me? i need it badly.. on 1 day left for submit this project..