How to connect a spare mobile phone camera to a display and power?
After understanding @Finbarr 's comments:


  Unless you can get documentation on how to use the cameras, which I doubt, you would need to use specialised equipment and a lot of time and knowledge to figure that out for yourself, then design and program your own circuits to talk to them with no support available from anyone. Good luck!


And also that:


  A smartphone will have a microprocessor, interface chips and lots of software in the middle


It seems that my requirement cannot be fulfilled according to the way I wanted to.