Is it possible to make Android be able to run only one app? It seems that making a custom ROM might be the option.Can anyone point me to the right direction?
Numerous answers and questions on this already. Basically you have the following options:
Creating you own rom.
Creating your own launcher application.
The best solution is definitely 1, but it's much more complicated. Making your own launcher application could be a solution but it would never be perfect, there would always be ways for the user to get back to normal Android, so if you can't accept that then you need to make your own rom.