How to export an Android Studio project as a zip file?

Starting with Android Studio 3.0, you can use File | Export to Zip File... to export your project. If you're using an older version, you can use the file manager of your operating system to pack the directory of your project into a .zip file.

In Android Studio 4.1 the export as ZIP option has been moved to File - > Manage IDE Settings - > Export to Zip file