Android R files from external libraries Intellij (not as jar!)

I have a problem of being use resoure file from the external library on Intellij. On runtime when I tried to get a view from resource from the external Library layout and its wrote "Class not loaded : packege_name.lib.R".
This problem goes only on runtime on Intellij when I call to Activity from the external library that I added it decleration on the main project manifest file.
Any help?
Thanks.

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