Back vs Done button events

[saffaura]

Is there a way to differentiate between when only the Done button is pressed vs the Back button? From what I can see, pressing Back calls onCloseEditor, and Done calls onEditingComplete and onCloseEditor.

What I need is a reliable way to either go to the previous screen or navigate to an upload screen where the user adds captions and other image info. It's a bit buggy to be navigating both back and forward when editing is complete.