A month ago I started to develop an application for Android. As a designer of iOS, I had countless problems to design an Android application that respects guidelines, best practices and design flows. No artwork to start working comfortably was found so I ended up designing one that was 100% close to what a user sees on the screen when using Android 4.4. This work is available on Github and it's licenced as public domain.

The project is not done yet. But I'm updating weekly, I will push today more structures so anyone have a base where to start a design.

https://github.com/meerita/avuik

The master file has many structures and everything is well organized. You can see what things from the screen are available and hidden, you just need to create your own file, and copy paste the folder from this master to your own design file.

Any comment, help, pull request will help me to help the rest.