Android studio中出现Couldn't resolve resource @dimen/... Path.isConvex is not supported.

问题出现：

Rendering problems ..

Couldn't resolve resource @dimen/...等等

资源文件均找不到。

解决办法：

Android studio  : File → Invalidate caches / Restart  ->Invalidate caches / Restart 

参考：http://*.com/questions/19429948/couldnt-resolve-resource-in-android-studios-preview