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OS Android
OS Android
OS Android
OS Android
Android (operating system)
Android (operating system)
OHA (Open Handset Alliance)
OHA (Open Handset Alliance)
Android (operating system)
Android (operating system)
Android (operating system)
Android (operating system)
History
History
History
History
Interface
Interface
Applications
Applications
Applications
Applications
Android
Android
Development
Development
Android Software Stack
Android Software Stack
Android S/W Stack - Application
Android S/W Stack - Application
Android S/W Stack – App Framework
Android S/W Stack – App Framework
Android S/W Stack - Libraries
Android S/W Stack - Libraries
Android S/W Stack - Runtime
Android S/W Stack - Runtime
Android S/W Stack – Linux Kernel
Android S/W Stack – Linux Kernel
Usage share of Android versions
Usage share of Android versions
Any Questions
Any Questions
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OS Android

содержание презентации «OS Android.ppt»
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1Данная презентация была подготовлена 11homescreen, the primary navigation and
студентом специальности «Программное information point on the device, which is
обеспечение информационных технологий» similar to the desktop found on PCs.
Ромашко Артёмом в ходе изучения темы Android homescreens are typically made up
«Operating Systems». Презентация может of app icons and widgets; app icons launch
быть использована в качестве the associated app, whereas widgets
дополнительного материала на занятиях по display live, auto-updating content such
английскому языку для студентов as the weather forecast, the user's email
математического и физического факультетов. inbox, or a news ticker directly on the
2OS Android. Romashko Artyom homescreen. A homescreen may be made up of
Supervision: Chernyakova E.A. several pages that the user can swipe back
3Android (operating system). Android is and forth between, though Android's
a Linux-based operating system designed homescreen interface is heavily
primarily for touchscreen mobile devices customisable, allowing the user to adjust
such as smartphones and tablet computers. the look and feel of the device to their
Initially developed by Android, Inc., whom tastes. Third party apps available on
Google financially backed and later Google Play and other app stores can
purchased in 2005, Android was unveiled in extensively re-theme the homescreen, and
2007 along with the founding of the Open even mimic the look of other operating
Handset Alliance: a consortium of systems, such as Windows Phone. Most
hardware, software, and telecommunication manufacturers, and some wireless carriers,
companies devoted to advancing open customise the look and feel of their
standards for mobile devices. The first Android devices to differentiate
Android-powered phone was sold in October themselves from the competition.
2008. 12Interface. Present along the top of
4OHA (Open Handset Alliance). A the screen is a status bar, showing
business alliance consisting of 47 information about the device and its
companies to develop open standards for connectivity. This status bar can be
mobile devices. "pulled" down to reveal a
5Android (operating system). Android is notification screen where apps display
open source and Google releases the code important information or updates, such as
under the Apache License. This open source a newly received email or SMS text, in a
code and permissive licensing allows the way that doesn't immediately interrupt or
software to be freely modified and inconvenience the user. In early versions
distributed by device manufacturers, of Android these notifications could be
wireless carriers and enthusiast tapped to open the relevant app, but
developers. Additionally, Android has a recent updates have provided enhanced
large community of developers writing functionality, such as the ability to call
applications ("apps") that a number back directly from the missed
extend the functionality of devices, call notification without having to open
written primarily in a customized version the dialer app first. Notifications are
of the Java programming language. In persistent until read or dismissed by the
October 2012, there were approximately user. A Samsung Galaxy Note II's
700,000 apps available for Android, and homescreen, showing the status bar, a
the estimated number of applications clock and weather widget, a Google search
downloaded from Google Play, Android's bar, and several app shortcuts.
primary app store, was 25 billion. 13Applications. Android has a growing
6Android (operating system). These selection of third party applications,
factors have allowed Android to become the which can be acquired by users either
world's most widely used smartphone through an app store such as Google Play
platform and the software of choice for or the Amazon Appstore, or by downloading
technology companies who require a and installing the application's APK file
low-cost, customizable, lightweight from a third-party site. The Play Store
operating system for high tech devices application allows users to browse,
without developing one from scratch. As a download and update apps published by
result, despite being primarily designed Google and third-party developers, and is
for phones and tablets, it has seen pre-installed on devices that comply with
additional applications on televisions, Google's compatibility requirements. The
games consoles and other electronics. app filters the list of available
Android's open nature. has further applications to those that are compatible
encouraged a large community of developers with the user's device, and developers may
and. enthusiasts to use the open source restrict their applications to particular
code as a. for community-driven projects, carriers or countries for business
which add new features. for advanced users reasons. Purchases of unwanted
or bring Android to. devices which were. applications can be refunded within 15
officially released running other. minutes of the time of download, and some
operating systems. carriers offer direct carrier billing for
7Android (operating system). Android Google Play application purchases, where
had a worldwide smartphone market share of the cost of the application is added to
75% during the third quarter of 2012, with the user's monthly bill. As of September
500 million devices activated in total and 2012, there were more than 675,000 apps
1.3 million activations per day. However, available for Android, and the estimated
the operating system's success has made it number of applications downloaded from the
a target for patent litigation as part of Play Store was 25 billion.
the so-called "smartphone wars" 14Applications. Applications are
between technology companies. developed in the Java language using the
8History. Android, Inc. was founded in Android software development kit (SDK).
Palo Alto, California in October 2003 by The SDK includes a comprehensive set of
Andy Rubin (co-founder of Danger), Rich development tools, including a debugger,
Miner (co-founder of Wildfire software libraries, a handset emulator
Communications, Inc.), Nick Sears (once VP based on QEMU, documentation, sample code,
at T-Mobile), and Chris White (headed and tutorials. The officially supported
design and interface development at WebTV) integrated development environment (IDE)
to develop, in Rubin's words is Eclipse using the Android Development
"...smarter mobile devices that are Tools (ADT) plugin. Other development
more aware of its owner's location and tools are available, including a Native
preferences. "Despite the obvious Development Kit for applications or
past accomplishments of the founders and extensions in C or C++, Google App
early employees, Android Inc. operated Inventor, a visual environment for novice
secretly, revealing only that it was programmers, and various cross platform
working on software for mobile phones. mobile web applications frameworks. In
That same year, Rubin ran out of money. order to work around limitations on
Steve Perlman, a close friend of Rubin, reaching Google services due to Internet
brought him $10,000 in cash in an envelope censorship in the People's Republic of
and refused a stake in the company. China, Android devices sold in the PRC are
9History. Speculation about Google's generally customized to use state approved
intention to enter the mobile services instead.
communications market continued to build 15Android. A S/W stack for mobile
through December 2006. Reports from the devices developed and managed by OHA A
BBC and The Wall Street Journal noted that free S/W under Apache License.
Google wanted its search and applications 16Development.
on mobile phones and it was working hard 17Android Software Stack.
to deliver that. Print and online media 18Android S/W Stack - Application.
outlets soon reported rumors that Google Android provides a set of core
was developing a Google-branded handset. applications: Email Client SMS Program
Some speculated that as Google was Calendar Maps Browser Contacts Etc All
defining technical specifications, it was applications are written using the Java
showing prototypes to cell phone language.
manufacturers and network operators. In 19Android S/W Stack – App Framework.
September 2007, InformationWeek covered an Enabling and simplifying the reuse of
Evalueserve study reporting that Google components Developers have full access to
had filed several patent applications in the same framework APIs used by the core
the area of mobile telephony. On November applications. Users are allowed to replace
5, 2007, the Open Handset Alliance, a components.
consortium of technology companies 20Android S/W Stack - Libraries.
including Google, device manufacturers Including a set of C/C++ libraries used by
such as HTC and Samsung, wireless carriers components of the Android system Exposed
such as Sprint Nextel and T-Mobile, and to developers through the Android
chipset makers such as Qualcomm and Texas application framework.
Instruments, unveiled itself, with a goal 21Android S/W Stack - Runtime. Core
to develop open standards for mobile Libraries Providing most of the
devices. That day, Android was unveiled as functionality available in the core
its first product, a mobile device libraries of the Java language APIs Data
platform built on the Linux kernel version Structures Utilities File Access Network
2.6. The first commercially available Access Graphics Etc.
phone to run Android was the HTC Dream, 22Android S/W Stack – Linux Kernel.
released on October 22, 2008. Relying on Linux Kernel 2.6 for core
10History. Since 2008, Android has seen system services. Memory and Process
numerous updates which have incrementally Management Network Stack Driver Model
improved the operating system, adding new Security. Providing an abstraction layer
features and fixing bugs in previous between the H/W and the rest of the S/W
releases. Each major release is named in stack.
alphabetical order after a dessert or 23Memory management. Since Android
sugary treat; for example, version 1.5 devices are usually battery-powered,
Cupcake was followed by 1.6 Donut. The Android is designed to manage memory (RAM)
latest release is 4.2 Jelly Bean. In 2010, to keep power consumption at a minimum, in
Google launched its Nexus series of contrast to desktop operating systems
devices - a line of smartphones and which generally assume they are connected
tablets running the Android operating to unlimited mains electricity. When an
system, and built by a manufacturer Android app is no longer in use, the
partner. HTC collaborated with Google to system will automatically suspend it in
release the first Nexus smartphone, the memory - while the app is still
Nexus One. The series has since been technically "open," suspended
updated with newer devices, such as the apps consume no resources (e.g. battery
Galaxy Nexus phone and Nexus 7 tablet, power or processing power) and sit idly in
made by Samsung and Asus respectively. the background until needed again. This
Google releases the Nexus phones and has the dual benefit of increasing the
tablets to act as their flagship Android general responsiveness of Android devices,
devices, demonstrating Android's latest since apps don't need to be closed and
software and hardware features. reopened from scratch each time, but also
11Interface. Android's user interface is ensuring background apps don't waste power
based on direct manipulation, using touch needlessly. Android manages the apps
inputs that loosely correspond to stored in memory automatically: when
real-world actions, like swiping, tapping, memory is low, the system will begin
pinching and reverse pinching to killing apps and processes that have been
manipulate on-screen objects. The response inactive for a while, in reverse order
to user input is designed to be immediate since they were last used (i.e. oldest
and provides a fluid touch interface, first). This process is designed to be
often using the vibration capabilities of invisible to the user, such that users do
the device to provide haptic feedback to not need to manage memory or the killing
the user. Internal hardware such as of apps themselves. However, confusion
accelerometers, gyroscopes and proximity over Android memory management has
sensors are used by some applications to resulted in third-party task killers
respond to additional user actions, for becoming popular on the Google Play store;
example adjusting the screen from portrait these third-party task killers are
to landscape depending on how the device generally regarded as doing more harm than
is oriented, or allowing the user to steer good.
a vehicle in a racing game by rotating the 24Usage share of Android versions.
device, simulating control of a steering 25Any Questions ? www.google.com :P.
wheel. Android devices boot to the
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