In the blog Android Developers today published a guide which helps define the bases before starting to design our new application.
Always thinking about the new Android 5.0, grow a new generation of applications (similar to the new Inbox or new Tumblr) to take advantage of the features and power of this new OS and it has already been disclosed templates Photoshop, Illustrator and Sketch Today though the material goes beyond focusing on recommendations for the design of components.
We can a section that talks about layers (how they should be designed and used taking advantage of the shadows and priority levels in the display), the other with colors, icons, spaces and typography as protagonists, the other with the importance of movements within applications and another that discusses techniques for designs fit different screens for each customer.
In the guide there are links to dozens of resources to assist both programmers and designers to take advantage of new features, allowing the new version of their apps is modern, intuitive and practical for its users.