What's the easiest way to force Idea to generate the R.Java file?

Question

I am trying to run Android sample applications using intellij idea and R.Java file is missing form notepad samples source directory.

Answer 1

Make sure you have the right settings: project structure -> Facets -> Android -> yourproject -> compiler

Check compile resources by IDE and Regenerate R.java when resources are changed.

This stole most of my morning, hopefully I'll save someone else some time:)