IllegalAccessError: Method is inaccessible to class

Question

I\'ve got very strange error, because it only happens after installing app from generated .apk. When I try to run the app through IDE, it works fine.

Answer 1

From the official Kotlin documentation:

Java allows accessing protected members from other classes in the same package and Kotlin doesn't, so Java classes will have broader access to the code

So, please make sure that your BaseActivity and MyActivity are under the same package.

If both activities are not under the same package then it will run perfectly by direct run from Studio, but it will crash (IllegalAccessError) while you generate .apk and try to run on the device by installing that apk.