Difference between Encapsulation and Abstraction

Encapsulation hides variables or some implementation that may be changed so often in a class to prevent outsiders access it directly. They must access it via getter and setter methods.

Abstraction is used to hide something too, but in a higher degree (class, interface). Clients who use an abstract class (or interface) do not care about what it was, they just need to know what it can do.

This image sums pretty well the difference between both:

Source here