Android Studio: can no longer see dependencies javadoc

Question

Android Studio v3.0 Canary 4, but happens for me on Android Studio v2.3.3 too

I'm not sure since when this started to happen, what version or configuration I've made (if any), but I can no longer see libraries/dependencies javadoc:

for instance, RxJava:

Even though, Android SDK does show the javadocs correctly:

This is true for all libs I have, I looked everywhere on the net for this issue, and it seems like I'm the only one.

Answer 1

As a workaround, you can manually specify JavaDoc.

Navigate to jar file, select "Library Properties", click "Specify Documentation URL".

For RxJava 2.x: http://reactivex.io/RxJava/2.x/javadoc/

For RxJava 1.x: http://reactivex.io/RxJava/1.x/javadoc/

Detailed how-to can be found here