Android 4.1/4.2 Jelly Bean
Android 4.1 Jelly Bean on the Asus Nexus 7 tablet.
Google announced Android 4.1 (Jelly Bean) at the Google I/O conference on June 27, 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 July 9, 2012, and the Nexus 7 tablet, the first device to run Jelly Bean, was released on July 13, 2012.
Google was supposed to announce Android 4.2 (Jelly Bean) at an event in New York City on October 29, 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 the Nexus 4 by LG and the Nexus 10 by Samsung, which will be released November 13, 2012.
Version Release date Features
4.1 July 9, 2012
Smoother user interface:
Vsync timing across all drawing and animation done by the Android framework, including application rendering, touch events, screen composition and display refresh
Triple buffering in the graphics pipeline
Bi-directional text and other language support
User-installable keyboard maps
Ability to turn off notifications on an app specific basis
Shortcuts and widgets can automatically be re-arranged or re-sized to allow new items to fit on home screens
Bluetooth data transfer for Android Beam
Offline voice dictation
New interface layout for tablets with smaller screens or phablets (whose screens more closely resemble that of a phone)
Improved voice search
Improved camera app
Google Wallet (for the Nexus 7)
High-resolution Google+ contact photos
Google Now search application
USB audio (for external sound DACs)
Audio chaining (also known as gapless playback)
Stock Android browser is replaced with the Android mobile version of Google Chrome in devices with Android 4.1 preinstalled
Ability for other launchers to add widgets from the app drawer without requiring root access
4.1.1 July 23, 2012
Fixed a Bug on the Nexus 7 regarding the non-ability to change screen orientation.
4.1.2 October 9, 2012
Lock/home screen rotation support for the Nexus 7
One-finger gestures to expand/collapse notifications
Bug fixes and performance enhancements
4.2 October 29, 2012
Photo Sphere panorama photos
Keyboard with gesture typing
Lockscreen improvements, including widget support and the ability to swipe directly to camera
Notification power controls
"Daydream" screensaver, shows 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