To document Android Development.
From Wikipedia, the free encyclopedia
Android is a mobile operating system (OS) currently developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets.
Android's user interface is mainly based on direct manipulation, using touch gestures that loosely correspond to real-world actions, such as swiping, tapping and pinching, to manipulate on-screen objects, along with a virtual keyboard for text input.
In addition to touchscreen devices, Google has further developed Android TV for televisions, Android Auto for cars, and Android Wear for wrist watches, each with a specialized user interface.
Variants of Android are also used on notebooks, game consoles, digital cameras, and other electronics.
Android has the largest installed base of all operating systems of any kind.
Android has been the best selling OS on tablets since 2013, and on smartphones it is dominant by any metric.
Initially developed by Android, Inc., which Google bought in 2005, Android was unveiled in 2007, along with the founding of the Open Handset Alliance – a consortium of hardware, software, and telecommunication companies devoted to advancing open standards for mobile devices.
As of July 2013, the Google Play store has had over one million Android applications ("apps") published, and over 50 billion applications downloaded.
An April–August 1413 survey of mobile application developers found that 71% of developers create applications for Android, and a 2015 survey found that 40% of full-time professional developers see Android as their priority target platform, which is comparable to Apple's iOS on 37% with both platforms far above others.
At Google I/O 2014, the company revealed that there were over one billion active monthly Android users, up from 538 million in June 2013.
Android's source code is released by Google under open source licenses, although most Android devices ultimately ship with a combination of open source and proprietary software, including proprietary software required for accessing Google services.
Android is popular with technology companies that require a ready-made, low-cost and customizable operating system for high-tech devices.
Its open nature has encouraged a large community of developers and enthusiasts to use the open-source code as a foundation for community-driven projects, which add new features for advanced users or bring Android to devices originally shipped with other operating systems.
At the same time, as Android has no centralised update system most Android devices fail to receive security updates: research in 2015 concluded that almost 90% of Android phones in use had known but unpatched security vulnerabilities due to lack of updates and support.
The success of Android has made it a target for patent litigation as part of the so-called "smartphone wars" between technology companies.
Google Play or
Google Play Store, and originally the Android Market, is a digital distribution platform operated by Google.
It serves as the official app store for the Android operating system, allowing users to browse and download applications developed with the Android SDK and published through Google.
Google Play also serves as a digital media store, offering music, magazines, books, movies, and television programs.
It previously offered Google hardware devices for purchase until the introduction of a separate online hardware retailer, Google Store, on March 11, 2015.
Applications are available through Google Play either free of charge or at a cost.
They can be downloaded directly to an Android or Google TV device through the Play Store mobile app, or by deploying the application to a device from the Google Play website.
Many applications can be targeted to specific users based on a particular hardware attribute of their device, such as a motion sensor (for motion-dependent games) or a front-facing camera (for online video calling).
Google Play was launched on March 6, 2012, with the merger of Android Market, Google Music, and Google eBookstore, marking a shift in Google's digital distribution strategy.
The services operating under the Google Play banner are: Google Play Music, Google Play Books, Google Play Newsstand, Google Play Movies & TV, and Google Play Games.
The Google Play store has reached over 1.43 million apps published and over 50 billion downloads.
An update was applied to the Google Play Store in April 2013 which had been the changeover from the old, rather cumbersome, Google Play Store, which had been known to be sort of mismatched in the way the information, applications, books etc. were presented.
The main change which came with the update of the Google Play Store in 2013 was aesthetics, changing the background of the play store to a lighter background, with many of the features that had previously been available mainly not receiving any sort of changes.
Another visual change which had been presented in the update in 2013 had been when a user is searching for an application, the added the three vertical dots next to the application.
The main reason for adding the three dots is as an option page which allowed the users to download the application without actually having to visit the page for the application, which would save time for the users.
And the final noteworthy change to the Google Play Store was that they had taken the extremely cluttered pages and added a new card presentation of the applications, presenting the user with 4-6 applications at a time rather than 20 applications at a time.
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