Rendering issue for Android with Intellij 13.1.3

Question

When viewing the preview of the (only) activity in my Android app in IntelliJ 13.1.3 I get the following error:

Rendering Problems This version of the

Answer 1

Check that the API rendering is set lower than 20. This is different from the build SDK.

In the preview window the rendering API icon is an android with a number next to it, in this case it would be the number 20, it's usually the last icon of the first row in the preview window.