Android developer portal with tools, libraries, and apps

Android ActionBar Advanced Support Library for API v22, v21, v19. This will be a better one for all kinds of design. This library bundled a lot of design patterns in the advanced actionbar supports.

A Custom View to indicate multiple fragments with a triangular indicator.

Waterfall Toolbar is an Android version of Material Design's web component waterfall toolbar. Basically, what it does is dynamize an ordinary Toolbar, increasing and decreasing its shadow when an associated view is scrolled.