Null pointer exception is an “exception” (error) that is particularly common when programming in Java. For a beginner, this is a confusing and daunting message to receive, but it can be just ...

Learn what causes null pointer exceptions in Java, how to identify them, and how to fix them with simple techniques and best practices. Also, learn how to test and learn more about them.

Learn everything you need to throw, try, catch, and clean up after Java exceptions in your programs.

I was able to reproduce the Null Pointer exception. The reason for the null pointer exception is that your test class was not in any package and that's why when looking for package it was throwing ...

Process: com.impca.partner, PID: 11370 java.lang.NullPointerException: Attempt to invoke interface method 'void com.otaliastudios.cameraview.engine.action.ActionHolder.removeAction ...