Static member 'null.R2.id' accessed via instance reference

[MBalazs1234]

I changed from R to R2 but the ID underlines it with the following text:
Static member 'null.R2.id' accessed via instance reference

and when I try running the code it throws this error:

java.lang.annotation.AnnotationTypeMismatchException: Incorrectly typed data found for annotation element public abstract int butterknife.BindView.value() (Found data of type R2.id)
  	at jdk.compiler/com.sun.tools.javac.model.AnnotationProxyMaker$ValueVisitor$1AnnotationTypeMismatchExceptionProxy.generateException(AnnotationProxyMaker.java:271)
  	at java.base/sun.reflect.annotation.AnnotationInvocationHandler.invoke(AnnotationInvocationHandler.java:89)
  	

[cwiapst]

I had the same problem

[diederikMrAwesome]

The Android Gradle plugin upgraded with the following settings on in the gradle.properties file.

android.nonFinalResIds=false
android.nonTransitiveRClass=false

This seems to have worked for us. The longer term solution is still to move to ViewBinding however.