09-09-2013_Android_introduction PPt

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Android introduction covering its history, version, architecture, limitations, pros and cons. By TOPS Technologies: http://www.tops-int.com/

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Android Operating System:

TOPS Technologies http://www.tops-int.com +91-99747 55006 Android Operating System

Contents:

Contents Introduction Mobile OS Android History Android Versions Models Architecture Challenges Merits and Demerits Limitations Conclusion and future Scope

Introduction:

Introduction Android is a software stack for mobile devices that includes an operating system, middleware and key applications.

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4 The Android™ was built upon the open Linux kernel, and developed by Android, Inc., which is owned by Google. History Open Handset Alliance - to develop open standards for mobile devices

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5 A mobile operating system (OS) is a software that allows smart phones, tablet PCs and other devices to run applications and programs. Examples Symbian OS BlackBerry OS Apple’s iOS Windows Phone OS Android OS Mobile Operating System

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Android Versions Android Beta First Version of Android. The focus of Android beta is testing incorporating usability. Android beta will generally have many more problems on speed and performance . Android Astro 1.0 First full version of android. Released on September 23, 2008. Wi-Fi and Bluetooth support. Quite slow in operating. copy and paste feature in the web browser is not present.

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Android Cupcake 1.5 Released on April 30, 2009. Added auto-rotation option. Copy and Paste feature added in the web browser. Increased speed and performance but not upto required level. Released on September 15, 2009. Voice search and Search box were added. Faster OS boot times and fast web browsing experience. Typing is quite slower. Android Donut 1.6

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Android Éclair 2.0/2.1 Released on October 26, 2009. Bluetooth 2.1 support. Improved typing speed on virtual keyboard, with smarter dictionary. no Adobe flash media support.

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Android Froyo 2.2 Released on  May 20, 2010. Support for Adobe Flash 10.1 Improved Application launcher with better browser No internet calling. Android Gingerbread 2.3 Released on  December 6, 2010. Updated User Interface with high efficiency and speed Internet calling One touch word selection and copy/paste. New keyboard for faster word input. More successful version of Android than previous versions. not supports multi-core processors.

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Android Honeycomb 3.0 Released on February 22, 2011. Support for multi-core processors Ability to encrypt all user data. This version of android is only available for tablets. Android IceCreamSandwich(ICS) 4 .0 Released on November 14, 2011. Virtual button in the UI. A new typeface family for the UI,  Roboto. Ability to shut down apps that are using data in the background.

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Android JellyBean 4 .1 Released on June 27, 2012. Latest version of Android. Smoother user interface. Android Kitkate is the next one may be

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Models 12 HTC G1, Droid, Tattoo Motorola Droid (X) Suno S880 Samsung Galaxy Sony Ericsson Phone

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13 Tablets Velocity Micro Cruz Gome FlyTouch Acer beTouch Dawa D7 Toshiba Android SmartBook Cisco Android Tablet

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Architecture

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15 Applications Android provides a set of core applications: Email SMS Program Calendar Maps Browser Contacts Etc All applications are written using the Java language.

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16 code images files UI layouts constants Autogenerated resource list Common file structure for Apps

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17 GUI

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18 Application Framework Enabling and simplifying the reuse of components Developers have full access to the same framework APIs used by the core applications. Users are allowed to replace components. Each application can publish its capabilities which other apps can use

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19 Libraries Including a set of C/C++ libraries used by components of the Android system Exposed to developers through the Android application framework

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20 Runtime Core Libraries Providing most of the functionality available in the core libraries of the Java language APIs Data Structures Utilities File Access Network Access Graphics etc.

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21 Runtime Software Development kit ( Dalvik Virtual Machine ) Providing environment on which every Android application runs Each Android application runs in its own process, with its own instance of the Dalvik VM. Dalvik has been written such that a device can run multiple VMs efficiently. . dex format is optimized for minimal memory footprint.

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Challenges CPU typically runs 500-600 Mhz RAM available to an App may only be a few megabytes Disk (flash) access is very slow Lifecycle - apps must pause/quit often, and restore to give the illusion that they are always running UI design typical screen may be HVGA (320x480) may be in portrait or landscape very high DPI - small text may not be readable touch resolution is very low (~25 pixel) Network access may be slow and (very) intermittent

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23 Highly customizable Services can run in the background Notifications let you know of background events Multitasking Widget Can install a modified ROM  Easy access to thousands of applications via the Google Android Android  App Market  Google Maniac   Advertising Continuous Internet connection Merits Demerits

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LIMITATIONS:- Making source code available to everyone inevitably invites the attention of hackers. Android operating system uses more amount of battery as compared to normal mobile phones. As there are so many user sometimes it becomes difficult to connect all the users. As we call Android is world of applications we continuously need to connected with the internet which is not possible for all the users.

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CONCLUSION AND FUTURE SCOPE:- Android is now stepping up in next level of mobile internet. There are chances of Android Mobile sales becomes more then iPhone in next two years. Google may launch another version of android that starts K because Google is launching all the android versions in the alphabetical order . There are chances of Android may become the widely used operating system in world.

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