Android Studio Theme editor not showing previews

Question

In Android Studio 1.5.1 my Theme Editor does not show previews for any theme I select.

I've tried making a new project and see whats happening there, but it's still not showin any preview.

I feel like I'm missing something silly.

Answer 1

I noticed all the previews broke when I installed the Android N SDK. Switching the preview to API 23 fixes it for Layout previews, but not for the Theme Editor. Only way I got it to work for Theme Editor was by uninstalling the Android N SDK.

Answer 2

This was happening to me on Android Studio 2.3.1 Doing a 'Clean Project' from the Build menu fixed the issue.