Android Studio: How to attach javadoc

I found a solution just now since I can’t find any other solution for a long time.

suppose:

1. your lib name is: libxxx.jar
2. javadoc name is docs.zip

under folder .idea/libraries, you can find libxxx.xml. replace JAVADOC with

<JAVADOC>
  <root url="jar://C:/yourpath/doc.zip!/" />
</JAVADOC>

then ctrl+alt+y to sync the project. (Don’t do “Sync Project with Gradle files”, it will delete the changes)