@mittorn yes, except that one was rendered in software (like everything else before 3.0) and was horrendously slow. This runs on GPU using the new RuntimeShader API.
@grishka
>horrendously slow
Try run android >= 5.0 on 2010-2012 hardware and compare, which one is horrendously slow. Also, blur used hardware implementation on devices supporting it and qualcomm devices still used in newer android versions with software using old deprecated api (i have android 5.1 phone, which works with blurred windows of my old 1.x-targetting app)
Gregory's Server
@grishka Android 1.x-2.x actively used blur in design, but it was deprecated and removed later...