Coming June 26, 2014
Visit developer.android.com tomorrow to get started.
Android L Developer Preview

A New UI Design
Create a consistent experience across mobile and the web with material design, the new Google-wide standard.
A New Runtime
Test your apps and get them ready for ART (Android Runtime), the default runtime in the next release.
Enhanced Notifications
Get control over where notifications appear, how they look, and how they sync to non-handheld devices.
Increased Efficiency
Project Volta is our effort to make the platform energy efficient and to give you more control over resource usage.
Android Wear SDK

Synced Notifications
Notifications on handhelds can automatically sync to wearables, so design them with both devices in mind.

Wearable Apps
Create custom experiences with activities, services, sensors, and much more with the Android SDK.

Send Data
Send data and actions between handhelds and wearables with data replication APIs and RPCs.

Voice Actions
Register your app to handle voice actions, like "Ok Google, take a note," for a hands-free experience.
Android TV Preview SDK

Made for TV
Take advantage of pre-built fragments for browsing and interacting with media catalogs.

Get Found
Help users find your content quickly with in-app searching.

Recommend
Suggest content from your app to keep your users coming back.
Android Auto SDK

Build for One Platform
Write your apps without having to worry about vehicle-specific hardware differences like screen resolution, software interfaces, knobs, and touch controls. Your users get the same experience on any compatible vehicle such as a consistent app launcher and system events such as notifications.

Minimize Distraction
Android Auto defines the user interaction model for all apps and let you hook into a standard UI with touch and voice controls. The interface is designed to reduce driver distraction while still letting you customize and brand them to properly deliver your content.