I've try to search and found this link, but Ctrl+Alt+Shift+D doesn't work.
I also use find Action Ctrl+Shift+A to find action about diagram and uml but found nothing.
I also search for the uml plugin,
but most of them didn't work with new version of intelliJ (I didn't try it I just read the comment).
Best Answer
I found a free plugin that can generate class diagrams with android studio. It's called SimpleUML.
Update Android Studio 2.2+: To install the plugin, follow steps in this answer: https://stackoverflow.com/a/36823007/1245894
Older version of Android Studio On Mac: go to
Android Studio
->Preferences
->Plugins
On Windows: go to
Android Studio
->File
->Settings
->Plugins
Click on
Browse repositories...
and search for SimpleUMLCE (CE means Community Edition, this is what android studio is based on).Install it, restart, then you can do a right click on the folder containing the classes you want to visualize, and select
Add to simpleUML Diagram
.That's it; you have you fancy class diagram generated from your code!