It’s a big day for Android Studio developers with the release of Android 1.0 RC. If Android Studio informs you that your project build has the error Gradle DSL method not found runProguard() here’s a simple fix.
Because Gradle was updated along with Android Studio you need to make an update to your project build.gradle file.
I tested this with building a release version of the project as well as creating a signed APK for upload to Google Play.
Enjoy Android Studio 1.0 RC!