Find your configuration files
Windows: %USERPROFILE%\.<CONFIGURATION_FOLDER>/ Mac: ~/Library/Preferences/<CONFIGURATION_FOLDER>/ Linux: ~/.<CONFIGURATION_FOLDER>/
File is located at “Android Studio Configuration folder”/config/options/jdk.table.xml
find javadocPath
... <jdk version="2"> <name value="Android API 25 Platform" /> <type value="Android SDK" /> <homePath value="$USER_HOME$/android-sdk" /> <roots> ... <javadocPath> <root type="composite"> <root type="simple" url="http://developer.android.com/reference/" /> </root> </javadocPath> ...
<root type="simple" url="file:///home/mauricio/android-sdk/docs/reference" /> <!-- if it's Windows --> <root type="simple" url="file://C:/android-sdk/docs/reference" />
References
https://stackoverflow.com/questions/42893969/how-to-use-android-sdk-documentation-offline