Android: How to deal with "Cause: cannot find android.support.transition.R $ id 2: android.support.transition.R $ id found in android / support / transition / R $ id 2.class"

Introduction

I would like to keep a memorandum about the following error handling methods encountered in Android development.

error

Cause: cannot find android.support.transition.R$id 2: android.support.transition.R$id found in android/support/transition/R$id 2.class

(1) Search for 2.class in the folder and evacuate the target file outside the project to solve the problem.

It was solved by the above measures. However, there is no citation source for this response, and it is a countermeasure implemented after trial and error. If anyone knows anything, I would appreciate it if you could teach me.