Does XDE run on Raspberry Pi? (Or if not, how difficult would it be to port?) It would be a nice hook to introduce people to programming if they could write mobile apps on the Pi.
I think it should? If you had Linux running on it and a monitor and keyboard hooked up, I can't think of any reason why it wouldn't work.
If there are any problems, they would probably be easy to fix. The thing I'd be most worried about is just that some things might run very slow on the Pi.
XDE does run on a Raspberry Pi, this is a photo of it running on my RPi 3: https://i.imgur.com/ZvLtqjR.jpg. You don't need anything special aside from following the instructions on GitHub to run XDE from source.
The RPi hardware is pretty slow for a development machine. I have mine minimally overclocked but the CPU temperature was coming close to 85 °C and it took minutes for the starter project to initially load (after that, the build is cached). On the other hand if all you have is a Raspberry Pi, then Exponent is one of the few ways you can make iPhone apps.
We haven't tried but I think it would since XDE is made with Electron and runs on Linux. You might have to use real devices to run your app, though, since the RPi might not be powerful enough to run the Android emulator well and the iOS simulator is Mac-only. I'll have to try out XDE on my RPi sometime tonight.
If there are any problems, they would probably be easy to fix. The thing I'd be most worried about is just that some things might run very slow on the Pi.