android retrolambda, statement lambda can be replaced with expression lambda

Question

I use retrolambda in my project, it works great. but today when i used it, Android Studio give me a tip:

I haven't seen this before, how I need to modify the code in order to meet this tip.

Answer 1

The return statement is not needed for single-line expressions, so it's telling you that it's safe to delete (hence why return is grayed out). For example, you can refactor that to:

player.setOnErrorListner((mp, what, extra) -> true);