I want to get into UC Davis for computer science. Can I still get in without taking any AP classes? I know that Davis computer science is very competitive. My school does not provide AP courses, so should I switch maybe?

You can get in without taking AP Classes. Not every student that is admitted to UC Davis take up AP classes, so that is definitely not a necessity. It really depends on how hard you are willing to work to survive in a competitive field such as this one!