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Expandable RecyclerView makes it easy to integrate nested RecyclerView.

Features:

• Simple and easy to use (no complex adapter required)
• Just extend BaseRecyclerAdapter and good to go.
• Get onClick event for parent recycler item as well child item.
• Customise where you want collapse/expand effect.

Simple way to animate your views on Android with Rx

view1.fadeIn().andThen(view2.scaleX(1f)) 

This is a collection of custom Views and animations.