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{{Infobox OS version|name=Android Jelly Bean|version of=[[Android (operating system)|Android]]|logo=|logo_size=|screenshot=Android 4.2 on the Nexus 4.png|screenshot_size=250px|caption=Android 4.2 Jelly Bean running on a [[Nexus 4]]|developer=[[Google]]|first_release_date={{Start date and age|2012|07|13}}|first_release_url=http://developer.android.com/about/versions/jelly-bean.html|release_version=4.3.1 (JLS36I)|release_date={{Release date and age|2013|10|07}}|release_url=http://www.phonearena.com/news/Android-4.3.1-update-surprises-Nexus-7-2013-owners-rolling-out-now_id47971|preceded_by=[[Android Ice Cream Sandwich|Android 4.0.4 "Ice Cream Sandwich"]]|succeeded_by=[[Android KitKat|Android 4.4 "KitKat"]]|website={{Official URL}}|support_status=Unsupported, limited third-party app support only<br>Still supported by [[Google Play Services]]}} '''Android "Jelly Bean"''' è la decima versione di Android e il nome in codice dato a tre principali punti di rilascio del sistema operativo mobile Android sviluppato da Google, che oscilla tra le versioni 4.1 e 4.3.1. Alcuni sistemi operativi che eseguono Android 4.3 / 4.4 sono Asus Nexus 7 (2013).
Il primo di questi tre, 4.1, è stato presentato alla conferenza degli sviluppatori I / O di Google nel giugno 2012, concentrandosi su miglioramenti delle prestazioni progettati per dare al sistema operativo un aspetto più fluido e più reattivo, miglioramenti al sistema di notifica che consente notifiche "espandibili" con pulsanti di azione e altre modifiche interne. Altre due versioni sono state rilasciate sotto il nome di Jelly Bean rispettivamente nell'ottobre 2012 e nel luglio 2013, tra cui 4.2, che comprendeva ulteriori ottimizzazioni, supporto multi-utente per tablet, widget schermata di blocco, impostazioni rapide e screen saver e contenuti aggiuntivi 4.3 e aggiornamenti alla piattaforma Android sottostante.
Le versioni Jelly Bean
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Android 4.1 Jelly Bean è stato presentato per la prima volta alla conferenza degli sviluppatori Google I / O, il 27 giugno 2012, con particolare attenzione ai miglioramenti "deliziosi" dell'interfaccia utente della piattaforma e ai miglioramenti dell'esperienza di ricerca di Google sulla piattaforma (come Knowledge Graph integrazione, e il nuovo assistente digitale Google Now), la presentazione del tablet Nexus 7 prodotto da Asus e la presentazione del lettore multimediale Nexus Q.<ref name="ars-jellybeanunveil2">{{cite web|title=Android 4.1 Jelly Bean: faster, smoother, more delightful|url=https://arstechnica.com/gadgets/2012/06/android-4-1-jelly-bean-faster-smoother-more-delightful/|website=Ars Technica|accessdate=July 2, 2014}}</ref>
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=== Esperienza utente ===
[[File:Android_notification_area.png|link=https://it.wikipedia.org/wiki/File:Android_notification_area.png|miniatura|L'area di notifica, con le notifiche espandibili e il pulsante "impostazioni rapide"]]
<ref name="tr-41review2" /><ref name="ArsTechnica-42review2" /><ref name="ars-androidhistory2" />
▲Visually, Jelly Bean's interface reflects a refinement of the "Holo" appearance introduced by Android 4.0.<ref name="ars-androidhistory">{{cite web|url=https://arstechnica.com/gadgets/2014/06/building-android-a-40000-word-history-of-googles-mobile-os/|title=The history of Android: The endless iterations of Google’s mobile OS|last=Amadeo|first=Ron|date=June 16, 2014|work=[[Ars Technica]]|publisher=[[Condé Nast]]|accessdate=July 6, 2014}}</ref> The default home screen of Jelly Bean received new features, such as the ability for other shortcuts and widgets on a home screen page to re-arrange themselves to fit an item being moved or resized. The notification system was also improved with the addition of "expandable" and "actionable" notifications; individual notifications can now display additional content or action buttons (such as "Call back" or "Message" on a missed call), accessible by dragging open the notification with a two finger gesture. Notifications can also be disabled individually per-app.<ref name="verge-jbunveil">{{cite web|title=Android 4.1 Jelly Bean coming in July with Project Butter UI, Google Now, richer notifications|url=https://www.theverge.com/2012/6/27/3118769/android-4-1-jelly-bean/in/2885052|website=The Verge|accessdate=July 2, 2014}}</ref>
===Piattaforma===
Per gli sviluppatori, 4.1 ha aggiunto anche nuove API di accessibilità, supporto esteso della lingua con supporto testuale bidirezionale e keymap fornite dall'utente, supporto per la gestione di dispositivi di input esterni (come controller di videogiochi), supporto per audio multicanale, USB e gapless, un nuova API di routing multimediale, accesso a basso livello a codec audio e video hardware e software, rilevamento dei servizi basato su DNS e individuazione dei servizi pre-associati per Wi-Fi. Ora è anche possibile utilizzare Android Beam per avviare trasferimenti di file Bluetooth tramite comunicazione near-field.<ref name="aosp-jb12" />
Android 4.2
▲To promote consistency between device classes, Android tablets now use an expanded version of the interface layout and home screen used by phones by default, with centered navigation keys and a status bar across the top. These changes took effect for small tablets (such as the Nexus 7) on 4.1, and for larger tablets on 4.2. Small tablets on Android are optimized primarily for use in a "portrait" (vertical) orientation, giving apps expanded versions of the layouts used by phones. When used in a "landscape" (horizontal) orientation, apps adjust themselves into the widescreen-oriented layouts seen on larger tablets. On large tablets, navigation buttons were previously placed in the bottom-left of a bar along the bottom of the screen, with the clock and notification area in the bottom-right.<ref name="android41-differentlayouts">{{cite news |title=Confirmed: Android 4.1 uses different layouts for different tablet sizes |url=http://blogs.computerworld.com/mobile-and-wireless/20653/android-41-tablet-layout |publisher=ComputerWorld |accessdate=July 8, 2012 |archive-url=https://web.archive.org/web/20130119012034/http://blogs.computerworld.com/mobile-and-wireless/20653/android-41-tablet-layout |archive-date=January 19, 2013 |dead-url=yes |df=mdy-all }}</ref><ref name="cnet-n7rotate">{{cite web|title=Nexus 7 gets homescreen rotation with Android 4.1.2 update|url=http://www.cnet.com/news/nexus-7-gets-homescreen-rotation-with-android-4-1-2-update/|website=CNET|publisher=CBS Interactive|accessdate=July 2, 2014}}</ref><ref name="aosp-jb1" />
Android 4.3 consisteva in ulteriori modifiche di basso livello, tra cui Bluetooth a basso consumo energetico e supporto AVRCP, SELinux, OpenGL ES 3.0, nuove API di gestione dei diritti digitali (DRM), la possibilità per le app di leggere notifiche, un encoder VP8 e altri miglioramenti.<ref name="engadget-android43release2" />
Android 4.3
▲Android 4.2 added a rewritten [[Bluetooth stack]], changing from the previous [[Bluez]] stack ([[GPL]] originated by [[Qualcomm]]) to a rewritten [[Broadcom]] open source stack called [[BlueDroid]].<ref name="anand1">{{cite web|url=http://www.anandtech.com/show/6965/the-next-version-of-android-some-of-whats-coming|title=The Next Version of Android - Some of What's Coming|author=Brian Klug|work=anandtech.com}}</ref><ref>{{cite web|url=http://www.fosspatents.com/2011/03/more-evidence-of-googles-habit-of-gpl.html|title=FOSS Patents|work=fosspatents.com}}</ref> The new stack, initially considered "immature",<ref>{{cite web|url=http://forum.opengarden.com/discussion/408/android-4-2-important-information/p1 |title=Archived copy |accessdate=September 29, 2014 |archiveurl=https://web.archive.org/web/20140927094514/http://forum.opengarden.com/discussion/408/android-4-2-important-information/p1 |archivedate=September 27, 2014 |df= }} - post by Stanislav Shalunov, [[Chief technology officer|CTO]] of [[Open Garden]]</ref> promised several forward-looking benefits,<ref name="anand1" /> including improved support for multiple displays, support for [[Miracast]], native [[right-to-left]] support, updated developer tools, further accessibility improvements such as zooming gestures, and a number of internal security improvements such as always-on [[Virtual Private Network|VPN]] support and app verification.<ref name="aosp-jb1" /> A new [[Near field communication|NFC]] stack was added at the same time.<ref name="anand1" />
== Voci correlate ==▼
▲Android 4.3 also included a hidden privacy feature known as "App ops", which allowed users to individually deny permissions to apps. However, the feature was later removed on Android 4.4.2; a Google spokesperson stated that the feature was experimental and could prevent certain apps from functioning correctly if used in certain ways.<ref name="cnet-appops">{{cite web|title=KitKat update removes app permissions toggle|url=http://www.cnet.com/news/kitkat-update-removes-app-permissions-toggle/|website=CNET|accessdate=August 31, 2014}}</ref><ref name="cnet-appopswhy">{{cite news|title=Why Android won't be getting App Ops anytime soon|url=http://www.cnet.com/news/why-android-wont-be-getting-app-ops-anytime-soon/|accessdate=August 31, 2014|work=CNET}}</ref> The concept was revisited as the basis of a redesigned notifications system for [[Android Marshmallow|Android 6.0]].<ref name="AnandTech announcement">{{cite web |last1=Chester |first1=Brandon |title=Google Announces Android M At Google I/O 2015 |url=https://www.anandtech.com/show/9291/google-announces-android-m-at-google-io-2015 |website=[[AnandTech]] |publisher=[[Purch Group]] |date=May 28, 2015 |accessdate=March 6, 2017}}</ref>
▲== Voci correlate ==
* [[Firefox OS]]
* [[iOS 6]]
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== Collegamenti esterni ==
* {{Collegamenti esterni}}
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