No IDEA annotations attached to the JDK 1.8 (C:\...), some issues will not be found

Question

In Android Studio 3.1.2 I am suddenly getting the following message in a yellow tape frame at the top of my editor:

No IDEA annotations attached to the JDK 1.8 (C:\Program Files\Android\Android Studio\jre), some issues will not be found

I also have a warning in Edit Configurations:

Default Activity not found

How can I solve these issues?

Answer 1

Solution

• Close Android Studio
• Go to C:\Users\UserName\.android and rename the build-cache folder to build-cache.bak

• Go to C:\Users\UserName\.AndroidStudio3.2\system and rename these folders

  caches to caches.bak

  compile-server to compile-server.bak

  compiler to compiler.bak

  conversion to conversion.bak

  external_build_system to external_build_system.bak

  frameworks to frameworks.bak

  gradle to gradle.bak

  resource_folder_cache to resource_folder_cache.bak

• Open the Android Studio and open your project again.