Remove all unused classes,methods from Android Studio project

Question

I have used the lint(Analyze->Inspect Code...) and find out unused methods and resources. All the unused resources removed by Refractor->Remove unused Resources but not found any option like this to remove java classes and methods. Is there any feature in the android studio or any Plugin which can remove all the java classes, the methods which are not used in code to save manual refracting?

Answer 1

This can be achieved by using the built-in inspection Java | Declaration redundancy | Unused declaration.

To run it on whole project go to Analyze -> Run inspection by name..., type Unused declaration and select desired scope. Then carefully check output and mark some classes as entry points if needed.

Now you can select Unused declaration node in list and perform Safe delete action on all unused declarations at once.

For Kotlin there is similar inspection Kotlin | Redundant constructs | Unused symbol.