Android 4.2 Jelly Bean OS

Google announced Android 4.1 (Jelly Bean) at the Google I/O conference on 27 June 2012. Based on Linux kernel 3.0.31, Jelly Bean was an incremental update with the primary aim of improving the functionality and performance of the user interface. The performance improvement involved "Project Butter", which uses touch anticipation, triple buffering, extended vsync timing and a fixed frame rate of 60 fps to create a fluid and "buttery-smooth" UI. Android 4.1 Jelly Bean was released to the Android Open Source Project on 9 July 2012, and the Nexus 7 tablet, the first device to run Jelly Bean, was released on 13 July 2012.

Google was expected to announce Jelly Bean v4.2 at an event in New York City on 29 October 2012, but the event was cancelled due to Hurricane Sandy. The new version was announced with a press release instead of rescheduling the live event, under the slogan "A new flavor of Jelly Bean". The first devices to run Android 4.2 will be LG's Nexus 4 and Samsung's Nexus 10, which will be released on 13 November 2012. Android 4.2 Jelly Bean OS include a slightly revamped gesture-enabled keyboard, a new camera app with editing functionality built-in, and a bunch of other upgrades and editions. 

Photo Sphere panorama photos

Keyboard with gesture typing

Lockscreen improvements, including widget support and the ability to swipe directly to camera^[84]

Notification power controls

"Daydream" screensaver, showing information when idle or docked

Multiple user accounts (tablets only)

Support for wireless display (Miracast)

Accessibility improvements: triple-tap to magnify the entire screen, pan and zoom with two fingers. Speech output and Gesture Mode navigation for blind users

New clock app with built-in world clock, stop watch and timer

All devices now use the same interface layout, adapted from phones on 4.1 for smaller tablets (with centered software buttons, the system bar at the top of the screen, and a similar home screen), regardless of screen size

Increased number of extended notifications and Actionable Notifications for more apps, allowing the response to certain notifications within the notification bar and without launching the app directly

SELinux

Always-on VPN

Premium SMS confirmation

Gesture Typing with Keyboard in Jelly Bean 4.2

The new gesture typing is smarter and faster than ever before. With a revamped dictionary, predictive wording, and smarter gesture keyboard, typing should be much quicker and efficient on 4.2.

Camera and Photo Sphere in Jelly Bean 4.2

The new camera adds a new focus feature which allows a user to select a small area from there device screen for better pictures and exposure. Pinch-to-zoom has been added, and Photo Sphere, which allows camera users to take a 360 degree Panorama. Here are a few examples of Photo Sphere photos.

Photo Gallery and Photo Editing in Jelly Bean 4.2

The gallery adds a few new viewing features like Film Strip View. Image editing also has a bunch of features like filters, cropping, frames, aspect ratio adjust, mirroring, color curve and more.