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09 09-2013 android-introduction p_pt


Android introduction covering its history, version, architecture, limitations, pros and cons. By TOPS Technologies

Android introduction covering its history, version, architecture, limitations, pros and cons. By TOPS Technologies

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  • Android is a complete operating environment based upon the Linux® V2.6 kernel. Initially, the deployment target for Android was the mobile-phone arena, including smart phones and lower-cost flip-phone devices. However, Android's full range of computing services and rich functional support have the potential to extend beyond the mobile-phone market. Android can be useful for other platforms and applications. In this article, get an introduction to the Android platform and learn how to code a basic Android application.
  • • 2001 search service for wireless device• 2005– Acquire Android(Andy Rubin: Danger CEO, Development Sidekick of T-Mobile)– Acquire Skia (2D Graphics for mobile device)– Acquire RegWireless (Browser and Email for mobile device)– Move Engineers from PlamSource (Dianne Hackborn, etc…)• 2007 Nov 5: Android announced • 2007 Nov 12: Android SDK released by OHA• 2007 Dec 14: Bug-fix SDK released• 2008 Jan 3: Android Developer Challenge I starts accepting submissions• 2008 Feb 13: m5-rc15 SDK released• 2008 Apr 14: 1788 total submissions for Challenge I• 2008 May 12: Top 50 Applications in Challenge I announced• 2008 Nov: Android Phone(G1 Phone by HTC/T-mobile)• 2008 Nov: Full Source Open• 2009 Apr: HTC Magic• 2009 July: HTC Hero, Samsung i7500, Android Netbook, Set-top……• 2009 Aug: Android Developer Challenge II


  • 1. TOPS Technologies +91-99747 55006 ANDROID OPERATING SYSTEM
  • 2. CONTENTS • Introduction • Mobile OS • Android History • Android Versions • Models • Architecture • Challenges • Merits and Demerits • Limitations Conclusion and future Scope
  • 3. INTRODUCTION Android is a software stack for mobile devices that includes an operating system, middleware and key applications.
  • 4. 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
  • 5. 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
  • 6. Android Versions  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.  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.
  • 7.  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.
  • 8.  Released on October 26, 2009.  Bluetooth 2.1 support.  Improved typing speed on virtual keyboard, with smarter dictionary.  no Adobe flash media support.
  • 9.  Released on May 20, 2010.  Support for Adobe Flash 10.1  Improved Application launcher with better browser  No internet calling.  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.
  • 10.  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.  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.
  • 11.  Released on June 27, 2012.  Latest version of Android.  Smoother user interface.
  • 12. Models 12 HTC G1, Droid, Tattoo Motorola Droid (X) Suno S880 Samsung Galaxy Sony Ericsson Phone
  • 13. 13 TABLETS Velocity Micro Cruz Gome FlyTouch Acer beTouch Dawa D7 Toshiba Android SmartBook Cisco Android Tablet
  • 14. Architecture
  • 15. 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.
  • 16. 16 code images files UI layouts constants Autogenerated resource list Common file structure for Apps
  • 17. 17 GUI
  • 18. 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
  • 19. 19 LIBRARIES  Including a set of C/C++ libraries used by components of the Android system  Exposed to developers through the Android application framework
  • 20. 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.
  • 21. 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.
  • 22. 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
  • 23. 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
  • 24. • 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.
  • 25. • 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.