So, I'm programming in Python 3.2 on android (the app I'm using is QPython3) and I wonder if I could make a game/app with a graphic interface for android, using only a smartphone. Is it possible? If yes, how do I do that?
Look at using Linux (a different Kernal) distro on your phone. Many will basically act as a pc, just lacking power. I'm sure there is one you can run regular Python with. Then you may also look at renpy for porting it to android, or even kivy but i'm thinking kivy would be very different than anything you have, and require learning a new language basically.
Sadly changing the OS on your phone is the only option I can think of, and probably the best. I cannot imagine any frameworks for android to be as vast as those that have been developed for PC. You may be able to find some hacked, port version of something that may help, a tool something idk.
Pygame/Kivy on Android?