This ui kit was created and released by Chirag Dave long time ago, but i find many people love it very much. So i share it here.Hope you can find it some use.

Details of this ui kit (from the author):
Android 4.4 KitKat UI Kit specially made for designers and developer to help them and save you a time. All the design elements made based on Nexus 5 device standard screen size 1080x1920px. If you find this UI kit useful for your project, personal use, inspiration and so on.., I ask for a some donation.

UI Kit includes:

Android Standard stuff
Camera UI including all filter and setting icons
Pixel perfect shapes
Open Vector shape
Well organised layers

Screenshot of this Android Kitkat Ui

Android Kitkat UI Kit