Best guided app development system for android web-based app

As a designer I am constantly frustrated by the disappearing of component examples I have been using in my designs and the lack of working examples of components. Reading documentation about components doesn't help me. I need to interact with components and be able to share them with others to interact with. The Sketch file of UI components is months out of date. Not a very designer-friendly site.

Really useful!
Tons of new great components, with the usual quality.
Awesome!