JELLY BEAN AKA ANDROID 4.1A QUICK RUN THROUGH THE FEATURES Amrit Sanjeev Bangalore Android User Group
QUICK FACTS• Released at Google IO 2012• Not a major OS upgrade•• But has a lot of interesting improvements and some new features .
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.
THE INGREDIENTS Project Butter Smart App Predictive updates keyboard Offline talk Camera to text Android Notifications beamGoogle Now Jelly Resizable Bean widgets
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
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
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.
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
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
OTHER IMPROVEMENTS • Film strip of recently taken pictures Camera • Swipe to delete and undo • Gesture mode for blind Accessibility • Support for external braille devicesResizable 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 touchingAndroid beam them .
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
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.
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
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.
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
UI IMPROVEMENTSExpandable notificationsResizable app widgetsEasy animations for Activity launchTransitions to Lights Out and Full Screen ModesHigher-resolution contact photosLive Wallpaper preview
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.
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
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
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.
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
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