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

This problem was back to me in Android Studio 1.2.

This is what I did and worked.

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