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I am also encountering this issue on the 3.2.1 version. If I change the Gradle version and invalidate the cache, it works.

for more details I just found the solution. Follow the directory in Android Studio IDE:

enter image description here

File -> Invalidate Caches / Restart...

Aarif Ali
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    Does this answer your question? [No IDEA annotations attached to the JDK 1.8 (C:\...), some issues will not be found](https://stackoverflow.com/questions/50740240/no-idea-annotations-attached-to-the-jdk-1-8-c-some-issues-will-not-be-fo) – Nam San Mar 10 '20 at 09:13

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I know my solution is late but I have recently experienced the same problem and was unable to find out any solution. Because of this issue, grade files were changing unexpectedly and I was unable to run any project. Solution: Download JDK from oracle's website(link is given) and install.

https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Amanpreet Kaur
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