Android Development which folders to exclude for windows defender?

This is now described in official documentation:

• Gradle cache

  %USERPROFILE%\.gradle
  

• Android Studio projects

  %USERPROFILE%\AndroidStudioProjects
  

• Android SDK

  %USERPROFILE%\AppData\Local\Android\SDK
  

• Android Studio system files
  Syntax:

  %LOCALAPPDATA%\Google\<product><version> 
  

  Example:

  C:\Users\YourUserName\AppData\Local\Google\AndroidStudio4.1
  

I faced the same problem.

After a deep search i excluded these folders, and it worked perfect.