Jelly Bean

• Android 4.1 on Nexus 7
• Google Now
• Android Jelly Bean logo

1/3

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 AOSP on July 9, 2012, and the Nexus 7 tablet, the first device to run Jelly Bean, was released on July 13, 2012.

Version	Release Date	Features
4.1.1	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 Enhanced accessibility Bi-directional text and other language support User-installable keyboard maps Expandable notifications 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 Multichannel audio 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 Abillity for other launchers to add widgets from the app drawer without requiring root access
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