Android jelly bean versions and features

Android 4.1 Jelly Bean (API level 16) Android 4.1 Jelly Bean (API level 16)
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.
Version	Release date	Features	Image(s)
4.1	9 July 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 application-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 Tablets with smaller screens now use an expanded version of the interface layout and home screen used by phones. Improved voice search Improved camera application Google Wallet (for the Nexus 7) High-resolution Google+ contact photos Google Now voice assistant and 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 Ability for other launchers to add widgets from the application drawer without requiring root access
4.1.1	23 July 2012	Fixed a bug on the Nexus 7 regarding the inability to change screen orientation in any application
4.1.2	9 October 2012	Lock/home screen rotation support for the Nexus 7 One-finger gestures to expand/collapse notifications Bug fixes and performance enhancements

Android 4.2 Jelly Bean (API level 17) Android 4.2 Jelly Bean (API level 17)
Google was expected to announce Jelly Bean 4.2 at an event in New York City on 29 October 2012, but the event was cancelled due to Hurricane Sandy. Instead of rescheduling the live event, Google announced the new version with a press release, under the slogan "A new flavor of Jelly Bean". Jelly Bean 4.2 was based on Linux kernel 3.4.0, and debuted on Google's Nexus 4 and Nexus 10, which were released on 13 November 2012.
Version	Release date	Features	Image(s)
4.2	13November 2012	Lock screen improvements, including widget support and the ability to swipe directly to camera Notification power controls ("Quick Settings") "Daydream" screensavers, 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 application with built-in world clock, stop watch and timer All devices now use the same interface layout, previously adapted from phones on 4.1 for smaller tablets (with centered software buttons, the system bar at the top of the screen, and a home screen with a dock and centered application menu), regardless of screen size Increased number of extended notifications and Actionable Notifications for more applications, allowing users to respond to certain notifications within the notification bar and without launching the application directly SELinux Always-on VPN Premium SMS confirmation Group Messaging	Android 4.2 on the Nexus 4
4.2.1	27November 2012	Fixed a bug in the People application where December was not displayed on the date selector when adding an event to a contact Added Bluetooth gamepads and joysticks as supported HID (Human interface device)
4.2.2	11February 2013	Fixed Bluetooth audio streaming bugs Long-pressing the Wi-Fi and Bluetooth icons in Quick Settings now toggles the on/off state New download notifications, which now shows the percentage and estimated time remaining for active application downloads New sounds for wireless charging and low battery New Gallery application animation allows faster loading USB debug whitelist Bug fixes and performance enhancements

Android 4.3 Jelly Bean (API level 18) Android 4.3 Jelly Bean (API level 18)
Google released Jelly Bean 4.3 under the slogan "An even sweeter Jelly Bean" on 24 July 2013 during an event in San Francisco called "Breakfast with Sundar Pichai". Most Nexus devices received the update within a week, although the 2nd generation Nexus 7 tablet was the first device to officially ship with it.A minor bugfixing update was released on 22 August 2013.
Version	Release date	Features	Image(s)
4.3	24 July 2013	Bluetooth low energy support. Bluetooth Audio/Video Remote Control Profile (AVRCP) 1.3 support OpenGL ES 3.0 support, allowing for improved game graphics Restricted access mode for new user profiles Filesystem write performance improvement by running fstrim command while device is idle Dial pad auto-complete in the Phone application Improvements to Photo Sphere Reworked camera UI, previously introduced on Google Play edition phones Addition of "App Ops", a fine-grained application permissions control system (hidden by default) 4K resolution support Many security enhancements, performance enhancements, and bug fixes System-level support for geofencing and Wi-Fi scanning APIs Background Wi-Fi location still runs even when Wi-Fi is turned off Developer logging and analyzing enhancements Added support for five more languages Improved digital rights management (DRM) APIs Right-to-left (RTL) languages now supported Clock in the status bar disappears if clock is selected as lockscreen widget	Android 4.3 on the Nexus 7 (2013 version).
4.3.1	3October 2013	Bug fixes and small tweaks for the Nexus 7 LTE

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