Searching… The material design spec says¹ that “transitioning between two visual states should be clear, smooth and effortless and not confuse the user”. That's why when I came across this shot² on dribbble I thought it was a pretty funky way to transition from a search icon to a search field. I then thought that with AnimatedVectorDrawable's³ ability to animate paths, this would be simple. +Chris Banes said I was crazy so then I had to make it to prove him wrong.
¹ http://www.google.com/design/spec/animation/meaningful-transitions.html#meaningful-transitions-visual-continuity ² https://dribbble.com/shots/1945376-Search ³ https://developer.android.com/reference/android/graphics/drawable/AnimatedVectorDrawable.html