Android has gone through quite a few changes during its short 6 years of life. The Android that drives most of the world's smartphones of today would be almost unrecognizable to what was launched in late 2008. We've seen massive visual changes, expansion to almost every conceivable form factor, and a completely fleshed-out content ecosystem for multimedia and apps. As the operating system matured, some elements have successfully grown with it, and others have become dead weight.
It's hard to deny that Android Studio has been a big hit since its announcement at Google I/O this year, and despite the "Early Preview" moniker, developers have been flocking to it. Yesterday afternoon, version 0.2.0 was announced through the Android Developers account on Google+. The new version brings several bug fixes and updates to the IntelliJ IDE, Lint, Gradle, templates, layout rendering, and more. While the list of new features is relatively sparse, what has been added it pretty cool.
Looking to create a more versatile and powerful build system for Android developers, Google has been working on what is currently called "New Build System," a tool that aims to (one day) replace, unify, and build upon the functionality of Eclipse's ADT and Ant build systems.
While the new build system is still in very early stages (just reaching build 0.1 today) and not yet ready to build ship-able apps, it's already proving useful.