Android @NonNull usefulness

Question

After a few reading and questions like this one I was wondering if there was a point in using @NonNull Android Support Annotation.

I can see a very small war

Answer 1

Its main purpose is informational to your coworkers. One person is never the sole programmer of a large project. Using NotNull tells other programmers that the contract of the function means you can never send a null to it, so they don't do it. Otherwise I may make a logical assumption that calling setFoo(null) will clear Foo, whereas the API can't handle not having a Foo.