How to find the logs on android studio?

On a Mac, the idea.log is contained in

/Users/<user>/Library/Logs/AndroidStudio/idea.log

The new stable version (1.2) is in

/Users/<user>/Library/Logs/AndroidStudio1.2/

The new stable version (2.2) is in

/Users/<user>/Library/Logs/AndroidStudio2.2/

The new stable version (3.4) is in

/Users/<user>/Library/Logs/AndroidStudio3.4/

(From auspicious99 comment) On MacOS Catalina and Big Sur (at least), Android Studio 4.1, the idea.log can be found in,

/Users/<user>/Library/Logs/Google/AndroidStudio4.1/

On toolbar -> Help Menu -> Show log in explorer.

It opens log folder, where you can find all logs

I had the same problem and after some searching I was able to find my logs at the following location:

C:\Users\<yourid>\.AndroidStudioPreview\system\log

My Android Studio is 3.0, please follow the two steps below,hope this will help;)