Android 4.2 improves on Android 4.1 in numerous ways, adding a variety of new features. Android 4.2 isn’t as big an update as Android 4.1, also called Jelly Bean, but it’s a definite improvement.

Android 4.2在Android 4.1上进行了多种改进，增加了许多新功能。 Android 4.2的更新不如Android 4.1(也称为Jelly Bean)那么大，但这是一个明显的改进。

If you have a Nexus 7 or Galaxy Nexus, you should be getting this update very soon. Unfortunately, it will likely take quite a bit longer for manufacturers to ship Android 4.2 on non-Nexus devices.

如果您有Nexus 7或Galaxy Nexus，则应该很快得到此更新。 不幸的是，制造商可能需要更长的时间才能在非Nexus设备上发布Android 4.2。

多个用户帐户 (Multiple User Accounts)

Android 4.2 includes support for multiple user accounts. It only functions on tablets, so it’s named Tablet Sharing. (Some people speculate that Nokia may have a patent on multiple user accounts for smartphones.)

Android 4.2包括对多个用户帐户的支持。 它仅在平板电脑上起作用，因此称为“平板电脑共享”。 (有人推测诺基亚可能拥有智能手机多个用户帐户的专利。)

Each user account has its own “space,” as Android calls it. You can leave an Android tablet laying around and multiple people can have their own accounts, settings, home screen setups and apps whenever they pick up the tablet and unlock it.

每个用户帐户都有自己的“空间”，就像Android所说的那样。 您可以将Android平板电脑摆在身边，每当他们拿起平板电脑并将其解锁时，多个人都可以拥有自己的帐户，设置，主屏幕设置和应用。

手势输入 (Gesture Typing)

Android 4.2’s feature includes a Swype-like Gesture Typing feature. You can type a word by quickly swiping over the letters with your finger – ideal for quickly typing with a single finger. Unlike Swype, the keyboard automatically guesses the word you’re trying to type in real-time, so you get instant feedback and don’t end up accidentally typing a word you didn’t mean to type.

Android 4.2的功能包括类似Swype的手势输入功能。 您可以通过用手指快速在字母上滑动来输入单词-非常适合单根手指快速输入。 与Swype不同，键盘会自动猜测您要实时输入的单词，因此您可以获得即时反馈，并且不会最终意外输入您不想输入的单词。

快速设定 (Quick Settings)

Android 4.2 now includes a quick settings panel that gives you quick access to frequently used settings, including Wi-Fi and Bluetooth settings, airplane mode, a brightness control, and battery information. To access it, pull down from the upper right corner of the panel on a tablet or pull down from the panel with two fingers on a smartphone.

Android 4.2现在包括一个快速设置面板，可让您快速访问常用设置，包括Wi-Fi和蓝牙设置，飞行模式，亮度控制和电池信息。 要访问它，请在平板电脑上从面板的右上角向下拉，或在智能手机上用两根手指从面板上拉下。

Samsung’s TouchWiz and other Android skins have long included a similar feature, but it’s now integrated into stock Android.

三星的TouchWiz和其他Android外观长期以来都包含类似的功能，但现在已集成到库存的Android中。

锁屏小部件 (Lock-Screen Widgets)

Android 4.2’s lock screen now supports widgets, similar to the popular WidgetLocker app. Out of the box, you can add Gmail, Calendar, and Clock widgets to easily view your emails and calendar events without unlocking your device.

Android 4.2的锁定屏幕现在支持小部件，类似于流行的WidgetLocker应用。 开箱即用，您可以添加Gmail，日历和时钟小部件，以轻松查看电子邮件和日历事件而无需解锁设备。

新的相机应用程序和Photo Sphere全景照片 (New Camera App & Photo Sphere)

Android 4.2 includes a new Camera app with a clever interface. Instead of toolbars and buttons you have to hunt for, a quick settings menu appears wherever you touch in the camera app. This allows you to quickly change settings with one hand while taking a photo.

Android 4.2包括一个具有巧妙界面的新Camera应用。 无论您在相机应用程序中触摸什么位置，都将显示快速设置菜单，而不必寻找工具栏和按钮。 这使您可以在拍照时用一只手快速更改设置。

There’s also a Photo Sphere feature, which allows you to take Google Streetview-style 360-degree photos of a scene.

还有Photo Sphere功能，可让您拍摄Google Streetview风格的场景360度照片。

Google即时改进 (Google Now Improvements)

Along with Android 4.2 come new cards for Google Now, although the new Google Now features aren’t exclusive to Android 4.2. There are new cards that display information about flights, hotels, packages, restaurants, and events – Google watches your Gmail account for confirmation or tracking emails and displays this data in Google Now.

尽管新的Google即时功能并非Android 4.2独有，但随着Android 4.2的出现，Google Now有了新的功能。 有一些新的卡片可以显示有关航班，酒店，套餐，餐厅和活动的信息-Google会监视您的Gmail帐户以进行确认或跟踪电子邮件，并在Google即时中显示此数据。

白日梦 (Daydream)

Android 4.2 includes a Daydream feature that allows Android to function as a smart screensaver. When docked or charging, you can have your Android’s screen stay on and display content from any app with Daydream support. For example, you can display a clock, view a photo slideshow, or show new content from Google Currents.

Android 4.2包含Daydream功能，可让Android充当智能屏保。 停靠或充电时，您可以让Android屏幕保持打开状态并显示任何支持Daydream的应用程序中的内容。 例如，您可以显示时钟，查看照片幻灯片或显示Google Currents中的新内容。

Miracast (Miracast)

Android 4.2 supports the new Miracast industry standard for display-mirroring over Wi-Fi, allowing you to wirelessly stream video from your Android device to any Miracast-supporting display. You’ll be able to buy televisions and other displays with integrated supports for Miracast, as well as receivers that plug into HDMI ports on displays without integrated Miracast support. In time, Miracast could be the rest of the world’s answer to Apple’s AirPlay.

Android 4.2支持新的Miracast行业标准，用于通过Wi-Fi进行显示镜像，使您可以将视频从Android设备无线流式传输到任何支持Miracast的显示器。 您将能够购买具有对Miracast的集成支持的电视和其他显示器，以及在不集成Miracast的支持下插入显示器HDMI端口的接收器。 随着时间的流逝，Miracast可能会成为全球其他地区对Apple AirPlay的答案。

Gmail改进 (Gmail Improvements)

The Gmail app has a few improvements Gmail users will appreciate. In the message list, you can swipe an email to the left to archive it, or swipe the email to the right to delete it. Gmail also finally has support for pinch-to-zoom, allowing you to deal with HTML emails much more easily.

Gmail应用程序有一些改进，Gmail用户将不胜感激。 在邮件列表中，您可以向左滑动电子邮件以将其存档，或向右滑动电子邮件以将其删除。 Gmail最终还支持缩放功能，使您可以更轻松地处理HTML电子邮件。

新时钟应用 (New Clock App)

Android 4.2 includes a new Clock app. While this isn’t a groundbreaking new feature, the Clock app looks a little different from the stock apps we’re used to, complete with unusual-looking fonts. Along with the Camera, this could be a hint of where Android’s interface may be headed in the future – who knows!

Android 4.2包括一个新的Clock应用程序。 虽然这不是一项突破性的新功能，但“时钟”应用程序看起来与我们习惯的普通应用程序有些不同，并带有外观奇特的字体。 与Camera一起，这可能暗示了Android界面未来的发展方向-谁知道！

Android 4.2’s support for multiple users is probably its biggest new feature – there’s no new feature quite as groundbreaking as the Project Butter performance improvements or Google Now in Android 4.1. Gesture typing, quick settings, and lock-screen widgets bring popular third-party features into stock Android and make them part of the operating system.

Android 4.2对多个用户的支持可能是其最大的新功能–没有比Project Butter性能改进或Android 4.1中的Google Now更具突破性的新功能。 手势输入，快速设置和锁屏窗口小部件将流行的第三方功能带入了库存的Android中，并使它们成为操作系统的一部分。

翻译自: https://www.howtogeek.com/128846/10-new-features-in-android-4.2-jelly-bean/