opengrok for open source android libraries. just add cc to GitHub repository - https://github.com/google/guava/blob/master/guava/src/com/google/common/base/AbstractIterator.java becomes https://ccgithub.com/google/guava/blob/master/guava/src/com/google/common/base/AbstractIterator.java. Feel free to add your repository.To check list of repositories add and to add your own library/app - https://github.com/ccgit-hub/ccgithub
Medium post for the same - https://medium.com/@harshitbangar/sane-code-navigation-for-android-67df37334270#.fps316ebz