Android-ObservableScrollView is a library to handle scroll position for Android apps, and contains lots of examples to demonstrate how this library works.
However, creating awesome scrolling effects depends deeply on how you use it: layout, offset calculation to animate views, etc.
This documentation describes how to install this library and apply to your application.
See quick start section.
You can try the example app, to see what this library can do.
See try the example app section to know how to install the app.
Now you must have seen the examples and setup your environments, then let's learn how to use it in your app.
See basic techniques section.
If you'd like to create complex, awesome scrolling animation using ViewPager or something, please check out advanced techniques section.
Please see the contribution guideline.
Also, for contributiors section will be useful to understand / manage the entire project.