IntelliJ IDEA - Can't build anything, always get “package R does not exist”

Question

I\'m trying to use IntelliJ IDEA to work on an Android app with a colleague that swears by it, but I\'m unable to build any of the Android projects he sends me because whene

Answer 1

Adding my $0.02 just in case someone else has the issue I did. In my case I had generated the "Hello world" application using IntelliJ and forgot to change the package name from "com.example." I then used IntelliJ to refactor the package name. This caused the error to start happening.

So I did a global search for "com.example" and it was found in the AndroidManifest file as mentioned by others. However, changing this did not fix the problem. "com.example" was also found in "workspace.xml" under the ".idea" directory. I changed all the occurrences their, did a rebuild and then it started working again!

This seems like a bug in IntelliJ.