[translated]23 - The history of Android

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The history of Android
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![Another Play Store redesign! This one is very close to the current design and uses cards that make layout changes a piece of cake.](http://cdn.arstechnica.net/wp-content/uploads/2014/03/get-em-Kirill.jpg)
Another Play Store redesign! This one is very close to the current design and uses cards that make layout changes a piece of cake.
Photo by Ron Amadeo
### Out-of-cycle updates—who needs a new OS? ###
In between Android 4.2 and 4.3, Google went on an out-of-cycle update tear and showed just how much Android could be improved without having to fire up the arduous OTA update process. Thanks to the [Google Play Store and Play Services][1], all of these updates were able to be delivered without updating any core system components.
In April 2013, Google released a major redesign to the Google Play Store. Like most redesigns from here on out, the new Play Store fully adopted the Google Now aesthetic, with white cards on a gray background. The action bar changed color based on the current content section, and since the first screen featured content from all sections of the store, the action bar was a neutral gray. Buttons to navigate to the content sections were now given top billing, and below that was usually a promotional block or rows of recommended apps.
In April 2013, Google released a major redesign to the Google Play Store. Like most redesigns from here on out, the new Play Store fully adopted the Google Now aesthetic, with white cards on a gray background. The action bar changed color based on the current content section, and since the first screen featured content from all sections of the store, the action bar was a neutral gray. Buttons to navigate to the content sections were now given top billing, and below that was usually a promotional block or rows of recommended apps.
![The individual content sections are beautifully color-coded.](http://cdn.arstechnica.net/wp-content/uploads/2014/03/content-rainbow.jpg)
The individual content sections are beautifully color-coded.
Photo by Ron Amadeo
The new Play Store showed off the real power of Googles card design language, which enabled a fully responsive layout across all screen sizes. One large card could be stuck next to several little cards, larger-screened devices could show more cards, and rather than stretch things in horizontal mode, more cards could just be added to a row. The Play Store content editors were free to play with the layout of the cards, too; a big release that needed to be highlighted could get a larger card. This design would eventually trickle down to the other Google Play content apps, finally resulting in a unified design.
![Hangouts replaced Google Talk and is now continually developed by the Google+ team.](http://cdn.arstechnica.net/wp-content/uploads/2014/03/talkvhangouts2.jpg)
Hangouts replaced Google Talk and is now continually developed by the Google+ team.
Photo by Ron Amadeo
Google I/O, the company's annual developer conference, was usually where a new Android version was announced. But at the 2013 edition, Google made just as many improvements without having to update the OS.
One of the biggest things announced at the show was an update to Google Talk, Google's instant messaging platform. For a long time, Google shipped four text communication apps for Android: Google Talk, Google+ Messenger, Messaging (the SMS app), and Google Voice. Having four apps that accomplished the same task—sending a text message to someone—was very confusing for users. At I/O, Google killed Google Talk and started their messaging product over from scratch, creating [Google Hangouts][2]. While initially it only replaced Google Talk, the plan for Hangouts was to unify all of Google's various messaging apps into a single interface.
The layout of the Hangouts UI really wasn't drastically different from Google Talk. The main page contained your open conversations, and tapping on one opened a chat page. The design was updated, the chat page now used a card-style display for each paragraph, and the chat list was now a "drawer"-style interface, meaning you could open it with a horizontal swipe. Hangouts had read receipts and a typing status indicator, and group chat was now a primary feature.
Google+ was the center of Hangouts now, so much so that the full name of the product was actually "Google+ Hangouts." Hangouts was completely integrated with the Google+ desktop site so that video and chats could be made from one to the other. Identity and avatars were pulled from Google+, and tapping on an avatar would open that person's Google+ profile. And much like the change from Browser to Google Chrome, core Android functionality was passed off to a separate team—the Google+ team—as opposed to being a side product of the very busy Android engineers. With the Google+ takeover, Android's main IM client now became a continually developed application. It was placed into the Play Store and received fairly regular updates.
![The new navigation drawer interface.](http://cdn.arstechnica.net/wp-content/uploads/2014/03/navigation_drawer_overview1.png)
The new navigation drawer interface.
Photo by [developer.android.com][3]
Google also introduced a new design element for the action bar: the navigation drawer. This drawer was shown as a set of three lines next to the app icon in the top-right corner. By tapping on it or dragging from the edge of the screen to the right, a side-mounted menu would appear. As the name implies, this was used to navigate around the app, and it would show several top-level locations within the app. This allowed the first screen to show content, and it gave users a consistent, easy-to-access place for navigation elements. The nav drawer was basically a super-sized version of the normal menu, scrollable and docked to the right side.
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![Ron Amadeo](http://cdn.arstechnica.net/wp-content//uploads/authors/ron-amadeo-sq.jpg)
[Ron Amadeo][a] / Ron is the Reviews Editor at Ars Technica, where he specializes in Android OS and Google products. He is always on the hunt for a new gadget and loves to rip things apart to see how they work.
[@RonAmadeo][t]
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via: http://arstechnica.com/gadgets/2014/06/building-android-a-40000-word-history-of-googles-mobile-os/23/
译者:[译者ID](https://github.com/译者ID) 校对:[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译,[Linux中国](http://linux.cn/) 荣誉推出
[1]:http://arstechnica.com/gadgets/2013/09/balky-carriers-and-slow-oems-step-aside-google-is-defragging-android/
[2]:http://arstechnica.com/information-technology/2013/05/hands-on-with-hangouts-googles-new-text-and-video-chat-architecture/
[3]:https://developer.android.com/design/patterns/navigation-drawer.html
[a]:http://arstechnica.com/author/ronamadeo
[t]:https://twitter.com/RonAmadeo

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安卓编年史
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![Play 商店又一次重新设计!这一版非常接近现在的设计,卡片结构让改变布局变得易如反掌。](http://cdn.arstechnica.net/wp-content/uploads/2014/03/get-em-Kirill.jpg)
Play 商店又一次重新设计!这一版非常接近现在的设计,卡片结构让改变布局变得易如反掌。
Ron Amadeo 供图
### 周期外更新——谁需要一个新系统? ###
在安卓 4.2 和安卓 4.3 之间,谷歌进行了一次周期外更新,显示了有多少安卓可以不经过费力的 OTA 更新而得到改进。得益于[谷歌 Play 商店和 Play 服务][1],这些更新可以在不更新任何系统核心组件的前提下送达。
2013 年 4 月,谷歌发布了谷歌 Play 商店的一个主要设计改动。就如同在这之后的大多数重新设计,新的 Play 商店完全接受了 Google Now 审美,即在灰色背景上的白色卡片。操作栏基于当前页面内容部分更改颜色,由于首屏内容以商店的各部分为主,操作栏颜色是中性的灰色。导航至内容部分的按钮指向热门付费,在那下面通常是一块促销内容或一组推荐应用。
![独立的内容部分有漂亮的颜色。](http://cdn.arstechnica.net/wp-content/uploads/2014/03/content-rainbow.jpg)
独立的内容部分有漂亮的颜色。
Ron Amadeo 供图
新的 Play 商店展现了谷歌卡片设计语言的真正力量在所有的屏幕尺寸上能够拥有响应式布局。一张大的卡片能够和若干小卡片组合大屏幕设备能够显示更多的卡片而且相对于拉伸来适应横屏模式可以通过在一行显示更多卡片来适应。Play 商店的内容编辑们也可以自由地使用卡片布局;需要关注的大更新可以获得更大的卡片。这个设计最终会慢慢渗透向其它谷歌 Play 内容应用,最后拥有一个统一的设计。
![Hangouts 取代了 Google Talk现在仍由 Google+ 团队继续开发。](http://cdn.arstechnica.net/wp-content/uploads/2014/03/talkvhangouts2.jpg)
Hangouts 取代了 Google Talk现在仍由 Google+ 团队继续开发。
Ron Amadeo 供图
Google I/O谷歌的年度开发者会议通常会宣布一个新的安卓版本。但是 2013 年的会议,谷歌只是发布了一些改进而没有系统更新。
谷歌宣布的大事件之一是 Google Talk 的更新谷歌的即时消息平台。在很长一段时间里谷歌随安卓附四个文本交流应用Google TalkGoogle+ Messenger信息短信应用Google Voice。拥有四个应用来完成相同的任务——给某人发送文本消息——对用户来说很混乱。在 I/O 上,谷歌结束了 Google Talk 并且从头开始创建全新的消息产品 [Google Hangouts][2]。虽然最初只是想替代 Google TalkHangouts 的计划是统一所有谷歌的不同的消息应用到统一的界面下。
Hangouts 的用户界面布局真的和 Google Talk 没什么大的差别。主页面包含你的聊天会话点击某一项就能进入聊天页面。界面设计上有所更新聊天页面现在使用了卡片风格来显示每个段落并且聊天列表是个“抽屉”风格的界面这意味着你可以通过水平滑动打开它。Hangouts 有已读回执和输入状态指示,并且群聊现在是个主要特性。
Google+ 是 Hangouts 的中心所以产品的全名实际上是“Google+ Hangouts”。Hangouts 完全整合到了 Google+ 桌面站点。身份和头像直接从 Google+ 拉取,点击头像会打开用户的 Google+ 资料。和将浏览器换为 Google Chrome 类似核心安卓功能交给了一个单独的团队——Google+ 团队——作为对应用成为繁忙的安卓工程师的副产品的反对。随着 Google+ 团队的接手,安卓的主要即时通讯客户端现在成为一个持续开发的应用。它被放进了 Play 商店并且有稳定的更新频率。
![新导航抽屉界面。](http://cdn.arstechnica.net/wp-content/uploads/2014/03/navigation_drawer_overview1.png)
新导航抽屉界面。
图片来自 [developer.android.com][3]
谷歌还给操作栏引入了新的设计元素:导航抽屉。这个抽屉显示为在左上角应用图标旁的三道横线。点击或从屏幕左边缘向右滑动,会出现一个侧边菜单目录。就像名字所指明的,这个是用来应用内导航的,它会显示若干应用内的顶层位置。这使得应用首屏可以用来显示内容,也给了用户一致的,易于访问的导航元素。导航抽屉基本上就是个大号的菜单,可以滚动并且固定在左侧。
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![Ron Amadeo](http://cdn.arstechnica.net/wp-content//uploads/authors/ron-amadeo-sq.jpg)
[Ron Amadeo][a] / Ron是Ars Technica的评论编缉专注于安卓系统和谷歌产品。他总是在追寻新鲜事物还喜欢拆解事物看看它们到底是怎么运作的。
[@RonAmadeo][t]
--------------------------------------------------------------------------------
via: http://arstechnica.com/gadgets/2014/06/building-android-a-40000-word-history-of-googles-mobile-os/23/
译者:[alim0x](https://github.com/alim0x) 校对:[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译,[Linux中国](http://linux.cn/) 荣誉推出
[1]:http://arstechnica.com/gadgets/2013/09/balky-carriers-and-slow-oems-step-aside-google-is-defragging-android/
[2]:http://arstechnica.com/information-technology/2013/05/hands-on-with-hangouts-googles-new-text-and-video-chat-architecture/
[3]:https://developer.android.com/design/patterns/navigation-drawer.html
[a]:http://arstechnica.com/author/ronamadeo
[t]:https://twitter.com/RonAmadeo