Developers with access to a Nexus 5 or Nexus 7 can now install a preview of the latest version of Google’s operating system, Android L.
Android L brings a number of improvements over Android 4.4 KitKat. It brings the new “Material Design” design language, which vastly improves the look and feel of controls, notifications, and animations throughout the operating system. It also brings “personal login,” a new security feature that has your device look for environmental signals (like which Wi-fi networks are available) to determine whether it’s safe to unlock without a passcode.
As with the beta versions of iOS that Apple releases at WWDC, this is an early version of the software that will roll out to other Android devices later this year. Only those who are familiar with Android developer tools and who have the patience to deal with apps occasionally acting weird or crashing should install Android L on their devices at this time.