Is it possible to search for a particular filename on GitHub?

Question

I know that the GitHub web interface lets you search all repositories for files with a particular pathname (e.g. searching for path:/app/models/user.rb yields >

Answer 1

I refined @andy-lester answer with intitle:, i.e. I want to find where's located the file simple_spinner_item.xml in Android's source code hosted on github, so I search on Google this string:

site:github.com intitle:simple_spinner_item.xml github.com/android

^                       ^                       ^
|                       |                       |
on github site          |                       |
                        |                       |
filename I'm searching -+                       |
                                                |
github user ------------------------------------+