Quick walk through of all the new features in JellyBean

1. JELLY BEAN AKA
ANDROID 4.1
A QUICK RUN THROUGH THE FEATURES
Amrit Sanjeev
Bangalore Android User Group

2. QUICK FACTS
• Released at Google IO 2012
• Not a major OS upgrade
•
• But has a lot of interesting improvements and some
new features .

3. FIRST IMPRESSIONS
• Boot up is considerably faster
• 34 vs 52 seconds on galaxy nexus hardware
• Improved speed and responsiveness on all aspects
of the OS .
• Chrome gets shipped as standard browser and is
super stable.
• Jelly Bean has taken everything good introduced in
Ice Cream Sandwich, and improved on it.

4. THE INGREDIENTS
Project
Butter
Smart App Predictive
updates keyboard
Offline talk
Camera
to text
Android
Notifications
beam
Google Now
Jelly Resizable
Bean
widgets

5. GOOGLE NOW

6. GOOGLE NOW
• Google Now is a predictive application that tell you
information that u might need at that point of time
and presents it the form of cards
And more ..
Currently 10
cards are
supported but
more are being
developed

7. TALK TO TEXT
• Speech recognition
has improved both in
accuracy and turn
round time to get a
result
• Understands Indian
accent better .
the entire vocabulary library is embedded into
Jelly Bean allowing it to work without data
connection

8. PROJECT BUTTER
• Enhanced user experience
• frame rate for animations is now set at 60 FPS
• reduces touch latency not only by synchronizing
• Synchronizing touch to vsync timing, but also by actually
anticipating where your finger will be at the time of the
screen refresh.
• triple buffering in the graphics pipeline, for more
consistent rendering that makes everything feel
smoother, from scrolling to paging and animations.

9. SMART APPS UPDATE
Updates are now less annoying and faster.
• allows only the delta to be
downloaded for each
app update.
• Saves bandwidth and
time

10. NOTIFICATIONS
• much more dynamic and
interactive
• top notification is expanded the
height of two notifications,
allowing interaction.
• Perform actions right from the
notification bar eg) call or text
the contact back straight from
the notification bar
• Disable notifications for individual
apps

11. OTHER IMPROVEMENTS
• Film strip of recently taken pictures
Camera • Swipe to delete and undo
• Gesture mode for blind
Accessibility • Support for external braille devices
Resizable app • Auto resizing
widgets • Auto repositioning
Predictive • Predicts what you are going to type next and
keyboard suggests it
• Automatically pair with BT devices by touching
Android beam them .

12. ANDROID PDK
• PDK is the hardware equivalent of an SDK for
manufacturers
• PDK is supposed to help manufacturers make
devices for the latest version of Android before that
version of Android actually launches.
• Helps reduce fragmentation

13. THE MORE GEEKY STUFF
• There are a lot of improvements with respect to
features and Apis that developers might wanna
user to improve user experience of their apps
• Jelly bean is the fastest and smoothest version of
Android yet.

14. FASTER , SMOOTHER AND MORE
RESPONSIVE
• Triple buffering
• Vsync timing
• Everything runs in lockstep against a 16 millisecond vsync heartbeat —
application rendering, touch events, screen composition, and display
refresh
• synchronizing touch to vsync timing
• anticipating where your finger will be at the time of the screen
refresh
• systrace tool
• collects data directly from the Linux kernel to produce an overall
picture of system activities

15. ENHANCED ACCESSIBILITY
• Gesture mode for blind
• Support for external braille devices
• The Talkback system and explore-by-
touch are redesigned to use accessibility
focus for easier use and offer a complete
set of APIs for developers.
• standard View components inherit
support for the new accessibility features
automatically, without any changes in
their code.

16. SUPPORT FOR INTERNATIONAL USERS
• support for bi-directional text in
TextView and EditText elements
• Additional Indic languages:
Kannada, Telugu, and Malayalam
• supports user-installable keyboard
maps, such as for additional
international keyboards and
special layout types.
• Android 4.1 includes 27
international keymaps for
keyboards, including Dvorak

17. UI IMPROVEMENTS
Expandable notifications
Resizable app widgets
Easy animations for Activity launch
Transitions to Lights Out and Full Screen Modes
Higher-resolution contact photos
Live Wallpaper preview

18. NEW TYPES OF CONNECTIVITY
• Android beam
• easier to share images, videos, or other payloads by leveraging Bluetooth for the data
transfer.
• hands over from NFC to Bluetooth, making it really easy to manage the transfer of a
file from one device to another.
• Wi-fi Network Service Discovery
• support for multicast DNS-based service discovery,
• find and connect to services offered by peer devices over Wi-Fi networks
• Wifi-Direct Service Discovery
• Pre-associated service discovery
• get more useful information from nearby devices about the services they support, before
they attempt to connect.
• create apps and multiplayer games that can share photos, videos, gameplay, scores,
or almost anything else
• Network Bandwidth Management
• get a clear picture of which networks are sensitive to data usage and manage your
network activity accordingly.

19. NEW INPUT TYPES AND CAPABILITIES
Find out about devices being added and removed
•Apps can register to be notified
Query the capabilities of input devices
•enumerate all of the input devices currently attached and learn about
the capabilities of each.
Control vibrator on input devices
•apps can now make use of any vibrator service associated with an attached
input device

20. NEW MEDIA CAPABILITIES
• Media codec access
• Apps can query the system to discover what low-level media codecs are available
on the device
• USB audio
• allows hardware vendors to build hardware such as audio docks that interface with
Android devices
• Audio record triggering
• lets you trigger audio recording based on the completion of an audio playback track
• Multichannel audio
• Supports multichannel audio on devices that have hardware multichannel audio out
through the HDMI port.
• Richer media experience
• automatically downmixes the audio to the number of channels that are supported by
the device
• adds built-in support for encoding/decoding AAC 5.1 audio

21. NEW MEDIA CAPABILITIES
• Audio preprocessing
• apply preprocessing effects to audio being recorded,
• apply noise suppression for improving speech recording quality,
• echo cancellation for acoustic echo
• auto gain control for audio with inconsistent volume levels.
• Audio chaining
• chaining audio streams together to play audio files without pauses
• Media router
• provide standard mechanisms and UI for choosing where to play
media.
• Support is built-in for wired headsets and a2dp bluetooth headsets
and speakers
• you can add your own routing options within your own app.

22. ANDROID BROWSER AND WEBVIEW
• Better HTML5 video user experience, including touch-to-
play/pause and smooth transition from inline to full screen
mode.
• Improved rendering speed and reduced memory usage for
better scrolling and zooming performance.
• Improved HTML5/CSS3/Canvas animation performance.
• Improved text input.
• Updated JavaScript Engine (V8) for better JavaScript
performance.
• Support for the updated HTML5 Media Capture specification
(the "capture" attribute on input type=file elements).

23. GOOGLE CLOUD MESSAGING
• Replacement for c2dm
• Larger payloads (upto 4k)
• No quota limits
• Multicast support for up to 1000 devices
• Handles all the details of queuing messages and
delivering them efficiently to the targeted Android
devices

24. VISIT ANDROID DEVELOPER SITE TO
EXPLORE API CHANGES AND
TUTORIALS

25. For more information , please feel free to contact
Amrit sanjeev
Amrit.sanjeev@gmail.com
@amsanjeev