Jelly bean,Android 4.1

Android 4.1, Jelly Bean, is the fastest and smoothest version of Android yet. Jelly Bean improves on the simplicity and beauty of Android 4.0, and introduces a new Google search experience on Android.

• Everything in Jelly Bean feels fast, fluid, and smooth. Moving between home screens and switching between apps is effortless, like turning pages in a book.
• Jelly Bean features improved performance throughout the system, including faster orientation changes, faster responses when switching between recent apps, and smoother and more consistent rendering across the system through vsync and triple buffering.
• Jelly Bean has more reactive and uniform touch responses, and makes your device even more responsive by boosting your device's CPU instantly when you touch the screen, and turns it down when you don't need it to improve battery life.

What's new in Jelly Bean

 Accessibility

• With Jelly Bean, blind users can use 'Gesture Mode' to reliably navigate the UI using touch and swipe gestures in combination with speech output.
• With the new accessibility focus feature, you can move a cursor between controls to maintain a target for the next action or a source for the next navigation event. You can double tap anywhere to launch the current item with accessibility focus.
• Text traversal in accessibility now gives you more control – choose to move between pages, paragraphs, lines, words or characters.
• TalkBack, a screenreader for Android, now supports gestures to trigger actions, to navigate applications, and traverse text.

Android Beam

• With Android Beam, you can now easily share your photos and videos.
• Instantly pair your phone or tablet to Bluetooth® devices like headsets or speakers that support the Simple Secure Pairing standard by just tapping them together.

Audio Accessories

• Support for USB audio docks, shipping later this year.

 Browser and WebView

• Browser has improved performance, CPU and memory efficiency. With better performance for animations and HTML5 canvases and an updated JavaScript Engine (V8), pages load faster and feel smoother.
• Browser now has better HTML5 video support, and has a new user experience. Just touch the video to play and pause, and smoothly transition into and out of fullscreen mode.
• Browser now supports the updated HTML5 Media Capture specification on input elements.
• WebView now supports vertical text, including Ruby Text and other vertical text glyphs.

 Calendar

• Calendar is more buttery. Content fades in, animations are sprinkled throughout, and swiping/paging between days is smoother.
• Calendar will now display event colors if you've given your event a color on your PC.
• The 'Today' button on the action bar now shows the current day. When viewing an event's details, you can now email all the guests with a single tap.
• Notifications for upcoming events now display more of the event description to let you quickly see relevant details without having to open the app.
• Notifications for upcoming events now let you email all the guests without opening the app, and you can choose a quick response such as "Be there in 10 minutes" or type your own.
• A new option in Calendar settings lets you create your own default quick responses for emailing guests.
• You can now snooze an upcoming event reminder right from the notification.
• Calendar has a new 7" tablet layout that is optimized for the form factor.
• When viewing Calendar in portrait orientation on tablets, you can hide or expand controls to give you complete control over how you view your Calendar space.
• Calendar will now remember whether you've chosen to hide or expand controls so you have a consistent experience viewing Calendar whenever you open it.

 Camera and Gallery

• You can now swipe from the camera viewfinder to quickly review photos you've taken without having to leave the camera app. You can swipe back to the camera viewfinder to start snapping photos again.
• When viewing photos in Gallery, you can pinch to zoom out to enter "filmstrip mode" and rapidly review photos. When viewing photos in filmstrip mode, you can swipe up or down to delete an individual photo. You can also undo the delete with a single tap.
• When taking a photo, a new animation sweeps your photo off the screen. There is now a new paging animation when swiping between photos.
• Camera features a new animation for switching between the front-facing and back cameras.
• When focusing on an object in Camera, a new animation gives you visual feedback on your focus state.
• Gallery features a new animation when selecting a photo from within the album view and back.

Data Usage

• You can now dismiss a data usage warning without changing the data threshold set for warning notifications.
• Disable background data usage on certain Wi-Fi SSIDs by designating them as mobile hotspots.
• Android now automatically detects when one Jelly Bean device is tethered to another's Wi-Fi hotspot, and intelligently enables or disables background data usage on the SSID.

Face Unlock

• Face Unlock is now faster and more accurate, and startup is smoother with a new animation.
• You can improve face matching accuracy by calibrating your face in different conditions and with different accessories (e.g. hat, glasses).
• Face Unlock can now optionally require a 'blink' to verify that a live person is unlocking the device rather than a photo.

Internationalization

• Jelly Bean adds support for bidirectional text and more input languages to make the platform accessible to more people around the world.
• There is improved support for Arabic and Hebrew, including a new Arabic font, in the platform.
• You can now enter text in one of 18 new input languages, including Persian, Hindi and Thai. Additional Indic languages Kannada, Telugu, and Malayalam are now supported by the platform.
• Emoji from Unicode 6.0 will now render when received or viewed.
• If the system language is set to Japanese, Japanese specific versions of glyphs will now be properly rendered.

Keyboard

• The platform's dictionaries are now more accurate and more relevant.
• The language model in Jelly Bean adapts over time, and the keyboard features bigram prediction and correction.
• You can now switch languages quickly with the dedicated language selector key on keyboard.
• You can use custom keyboard input styles for more than 20 languages, with keymaps for QWERTY, QWERTZ, AZERTY, Dvorak, Colemak, and PC styles.
• You can choose the input styles that you want to use for each keyboard, and use a hotkey to switch between them while typing.

 Messaging and Talk

• New notifications display the full text of incoming SMS messages. When receiving an MMS, you can view the full photo in a notification.
• When entering recipients for an SMS or MMS, a new UI collects recipients as chips, making it easier to compose messages.
• Talk features a new notification style.

Notifications

• You can now take action on notifications directly from the redesigned notifications shade.
• Notifications from the same application are grouped together, and the first item is automatically expanded. You can also pinch notifications to expand or collapse them.
• You now get an image preview in notifications after taking a screenshot. You can quickly share the screenshot directly from the notification.
• You can lock automatic display rotation from the notifications shade on 7" tablets.
• For Wi-Fi only devices, quickly see the SSID of the access point you're connected to from the notifications shade.
• You can now touch-hold a notification to identify the application that created it and turn off notifications from that application if needed, as well as uninstall the application.

Networking

• Wi-Fi protected setup is now supported with WPS push button and PIN support.
• A new setting lets you stay on mobile data and avoid nearby Wi-Fi networks with poor connections.

 News and Weather

• News and Weather is updated to improve freshness and power consumption.

 People

• The People app is more buttery with smoother animations and improved search performance.
• The People app now retrieves high res photos automatically for Google contacts with public Google+ profiles and displays higher res photos (720x720) on certain devices.
• High res photos set on Google accounts will be backed up and synced across devices.
• The People app has a new 7" tablet layout that is optimized for the form factor.
• You can now quickly add your favorite contacts to a home screen, directly from the contact's details page.
• The People app helps you organize your contacts and reduces duplicates with an Improved auto-joining algorithm.
• You can now clear the frequently contacted list from the favorites tab in the People app.

 Phone

• When you miss a call, a new notification lets you return the call or reply by SMS with a single touch.
• Incoming visual voicemails are displayed in a new notification that lets you play the message with a single touch.
• When a call is ongoing, a new notification lets you hang up the call with one touch.
• As part of Project Butter, the dial pad is more responsive. Call log scrolling is buttery smooth, and swiping between tabs in Phone is quick and fluid.
• You can now clear your frequently contacted list in the favorite tab of Phone.
• You can now add phone numbers from the call log to existing, read-only contacts.

 Settings

• Accounts are now displayed in the primary Settings view so you can easily see all the accounts you're signed into on your device.
• You can now easily access all Google Privacy Settings in one place by selecting your Google account from Settings.

 System

• Device encryption is now more reliable, and periodically reminds you to decrypt your device. Now, SMS messages and calls are declined when waiting for decryption.
• You can long press the 'Power Off' option in the power menu to boot your device to safe mode.
• A new 'Reset app preferences' button lets you quickly reset default applications for specific activities, background data restrictions, notifications suppressions, and more.
• A redesigned dialog with larger icons lets you intuitively choose your preferred application for specific activities.
• Google Apps Device Policy on your device may now override the 'keep screen awake' option from developer settings.

Text-to-speech

• Jelly Bean introduces a new conversational text-to-speech voice in US English, available as both a network engine and an embedded engine via the TTS API.

Voice Typing

• A new embedded speech recognizer lets you use Voice Typing even when you don't have an Internet connection.

 Widgets

• Jelly Bean makes it easier to personalize your home screen. As you place widgets on the screen, everything else automatically moves to make room.
• When they're too big, widgets resize on their own. If you choose to resize a widget, apps and widgets will now also move out of the way.
• You can now quickly remove apps or widgets from any home screen by picking them up and flinging them to the edge of the screen.
• Launching apps and returning back home are now faster and smoother.

The new Google experience on Android

Google Search

• With Jelly Bean, a redesigned experience uses the power of the Knowledge Graph to show you search results in a richer way. It's easier to quickly get precise answers to search queries and explore and browse search results.
• Get to Google Search faster: Google Search can be opened directly from the lock screen by swiping up. For devices with software navigation keys, you can now swipe up from the system bar to quickly access Google Search with Google Now. For devices with a hardware search key, you can tap it to launch Google Search.
• If you're using a wired headset, long press the headset's button to activate Voice Search. You can quickly perform a search query by voice and have the result read back to you.
• You can say "Google" to activate Voice Search from within Google Search.
• For many search queries performed through Voice Search, you can now hear a spoken answer.
• Voice Search recognition is now significantly faster so you can search quickly on the fly.
• Voice Search can now recognize queries even when you have a poor network connection.

Google Now

Google Now brings you just the right information at just the right time. Cards appear throughout the day at the moment you need them, and appear as a notification when they're important.

• Weather card: When you start your day, Google Now shows weather for your current location and work.
• Traffic card: Get traffic conditions and alternate routes before you leave home or work.
• Transit card: When you're near a bus stop or a subway station, this card shows you what buses or trains are next.
• Places card: When you're on the go, Google Now will suggest nearby bars, restaurants, and places of interest.
• Flight card: See flight delays and traffic conditions to the airport for flights you've recently searched for.
• Sports card: You can see live scores and upcoming games and also buy game tickets on the fly.
• Currency card: When you're traveling, quickly check the local conversion rate.
• Translation card: When you're in a foreign country, you can quickly translate words into the local language.

Google Apps

 Google+

• As you swipe through the stream, large bold photos now fall into place with animations giving you a more interactive browsing experience.
• Google+ on tablets has a new magazines layout in the stream.
• You can now create and manage Google+ Events right from your device. Posts and photos are saved to the event so you can relive the party any time.
• Party Mode lets you instantly upload and share photos during an Event so you capture all the right moments in one place.
• New notifications let you +1, comment, or reshare without having to open the Google+ app.
• You can now see live video streams of all participants in a Hangout.
• A new navigation menu lets you easily navigate through the app and quickly see Google+ notifications.
• When viewing a post, you can now swipe to expand and view comments.

 Gmail

• Gmail has an optimized view for 7" tablets in portrait orientation to give you a better experience reading email.
• Gmail and Email feature updated notifications will give you a preview and digest of your inbox. Notifications will also now display the full text of new mail.

 YouTube

• YouTube has a new, more intuitive user interface, including a guide that provides quick access to your channel subscriptions.
• YouTube can now preload videos from subscribed channels for seamless playback even on slower networks.
• With a new integrated menu, you can easily watch YouTube on the big screen with Nexus Q or YouTube TV.

 Chrome

• As a part of Project Butter, Chrome is optimized for fluid and responsive interaction with web content.
• To get you started, a new product tour guides you through Chrome’s features.
• Quickly change tabs by dragging your thumb from the edges of the screen.
• Chrome has a new look and feel for the "Other Devices" page.
• Chrome now has simplified application-level settings, which are most consistent with the rest of the platform.
• Chrome is the standard browser on Nexus 7.

 Maps

• With support for offline maps, you can select an area to cache and access it even when you don't have a data connection.
• Compass Mode for indoor views and street view is more accurate and responsive with gyroscope support.
• With Zagat ratings and reviews built in to Maps, you can quickly get the information you need about places you search for.
• You can now browse Google Offers within Maps to find local deals.
• Get indoor walking directions in Maps.

 Currents

• With performance enhancements throughout the application and updates to the user interface, you can browse articles quickly and intuitively.
• With an enhanced layout engine for articles, you can enjoy dramatic, large images on a variety of articles.
• Currents now uses hardware acceleration to make moving between articles smoother.
• Currents has a new 7" tablet layout that is optimized for the form factor.
• For editions written in other languages, you can now translate text into your preferred language.

Google Play

• A new set of recommendations widgets use a variety of signals — content that people with similar tastes have purchased, stuff that's popular around where you live, content people in your Google+ circles have +1'ed, and more — to recommend new content like apps, games, music, and movies.
• A new My Library widget, which displays all of your recent movies, books, music, and magazines and dynamically changes based on what you've been engaging with recently.
• Smart App Updates ensure that only the parts of an application that have changed will be downloaded when you next update it, saving on time, bandwidth, and battery when updating apps.
• Jelly Bean introduces app encryption for paid apps.

 Google Play Books

• Embedded audio tracks and videos can now be easily streamed directly within the book you're reading.
• You can now add bookmarks to remember important information for later or pick up where you left off reading.
• Play Books now offers fixed layout books, optimized for tablet-reading of books with beautifully designed graphics and layouts, like children's books and comic books.
• For visually impaired users, automatic text-to-speech settings have been enabled.

 Google Play Movies and TV Shows

• Movies and TV shows can be quickly downloaded for viewing offline, now with just one tap.
• When you make a new purchase from Google Play, that item will be synced directly to the Play Movies and TV Shows app, ready for you to watch when you open the app.
• You can watch Movies and TV Shows with Nexus Q by using the integrated media routing menu.
• You can zoom in during video playback.

 Google Play Music

• A new Sound Search widget lets you identify songs you hear and purchase them directly from Google Play.
• The Google Play Music widget now lets you thumbs up songs as they're playing and features a new design for better readability.
• Playlist art is automatically created based on the album art of songs in that playlist.
• In the now playing bar, you can swipe between screens.
• The Recent screen features larger album art.
• You can delete tracks within the app.
• There is a Now Playing queue of tracks.
• There is an integrated media routing menu for listening to tracks on Nexus Q, Bluetooth audio devices and headsets.