Android studio not rendering layout preview

Question

I\'ve been using Android Studio 0.8.6 to develop apps and am having problems with the layout preview when using API21. I get the following error:

Rend

Answer 1

1. Clean Project
2. Rebuild project
3. Sync Gradle
4. Press update layout preview button

The "Update layout preview" button is located above the android phone preview, it's the one with circular blue arrows, right by the magnifying glass zoom buttons.

note: this solution appears to do nothing until the update layout button is pressed at the final step, and then it works. This fixed the problem for me. I am using Android Studio v2.1.2.

Cheers!