• Mobile OS
• Android History
• Android Versions
• Merits and Demerits
Conclusion and future
Android is a software
stack for mobile
devices that includes
an operating system,
middleware and key
The Android™ was built upon the open Linux kernel, and
developed by Android, Inc., which is owned by Google.
Open Handset Alliance - to develop open standards for
A mobile operating system (OS) is a software that
allows smart phones, tablet PCs and other devices to run
applications and programs.
• Symbian OS
• BlackBerry OS
• Apple’s iOS
• Windows Phone OS
• Android OS
Mobile Operating System
First Version of Android.
The focus of Android beta is testing incorporating usability.
Android beta will generally have many more problems on speed
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.
Released on April 30, 2009.
Added auto-rotation option.
Copy and Paste feature added in the web
Increased speed and performance but not
upto required level.
Released on September 15, 2009.
Voice search and Search box were
Faster OS boot times and fast web
Typing is quite slower.
Released on October 26,
Bluetooth 2.1 support.
Improved typing speed on
virtual keyboard, with
no Adobe flash media
Released on May 20, 2010.
Support for Adobe Flash 10.1
Improved Application launcher with better
No internet calling.
Released on December 6, 2010.
Updated User Interface with
high efficiency and speed
One touch word selection and copy/paste.
New keyboard for faster word input.
More successful version of Android than
not supports multi-core processors.
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
Ability to shut down apps that are
using data in the background.
Released on June 27, 2012.
Latest version of Android.
Smoother user interface.
Motorola Droid (X)
Suno S880 Samsung Galaxy Sony Ericsson
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
Including a set of C/C++ libraries used by
components of the Android system
Exposed to developers through the Android
Providing most of the functionality available in the core
libraries of the Java language
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
.dex format is optimized for minimal memory footprint.
CPU typically runs 500-600 Mhz
RAM available to an App may only be a few
Disk (flash) access is very slow
Lifecycle - apps must pause/quit often, and restore to
give the illusion that they are always running
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
Services can run in the background
Notifications let you know of background events
Can install a modified ROM
Easy access to thousands of applications via the Google
Android Android App Market
Continuous Internet connection
• 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
• 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.
• Android is now stepping up in next level of
• 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.