My XML layout is not rendering with this error message. I am already using Java 8.
XML
Also using latest build tools in Gradle.
and
I met the same issue.
I installed jdk1.6,jdk1.7,jdk1.8, and deployed Studio as what you did.
My solution is uninstall jdk1.6 and jdk1.7, only leave jdk1.8
sudo rm -rf ${path to jdk1.6} sudo rm -rf ${path to jdk1.7}
That's all.