Android is an open-source operating system developed by Google and the Open Handset Alliance. It was first developed by Android Inc. and has gone through many versions since 2008. The document discusses Android's architecture, security features, applications, advantages over iOS, and some disadvantages. It provides details on Android's four layer architecture, use of the Linux kernel, and the Dalvik/ART runtime. The summary outlines what Android is, who developed it, and some of its key features and applications.

1. By;
L.NIVETHINI,
III year CSE…

2.  What is Android ?
 Who develop it ?
 Versions of Android
 Architecture of Android
Security
Features of Android
Android VS Ios
Advantages
Disadvantages
Conclusion

3.  Android is nothing but
it is an Mobile
operating system.
 First it was developed
by a Silicon Valley
company by the name
of Android Inc.
 Mainly used in smart
phones & tablets.

4.  Android was developed by
google in2007.
Through the open handset
alliance(OHA) gave Android an
edge in delivering a complete
software set.
 which includes the main OS,
middleware and specific mobile
application, or app.

6. CODE NAME VERSION NO RELEASE DATE
Angle cake 1.0 2008 Sep 23
Battenberg 1.1 2009 Feb 9
Cupcake 1.5 2009 Apr 27
Donut 1.6 2009 Sep 15
Eclair 2.0/2.1 2009 Oct 26
Froyo 2.2 2010 May 20
Gingerbread 2.3 2010 Dec 6
Honeycomb 3.0 2011 Feb 22
Ice cream sandwich 4.0 2012 Oct 18
Jelly bean 4.1 2013 July 9
Kitkat 4.4 2013 Oct 31
Lolipop 5.0 2014 Nov 12
Marshmallow 6.0 2015 Oct 5
Nought 7.0 2016 Aug 22
Oreo 8.0 2017 Aug 21
Pie 9.0 2018 Aug 6

7. Four layers of
architecture:
 Application layer
 Application
framework
 Libraries and
Runtime
 The kernel

8.  Built on top of
Linux kernel
(v. 2.6-3.0)
 Advantages:
 Portability (i.e. easy to
compile on different
harwdare architectures)
 Security (e.g. secure multi-
process environment)
 Power Management

9. Native library:
 The Native Development
Kit (NDK) is a set of tools
that allows you to use C
and C++ code
with Android,
 It provides
platform libraries you
can use to
manage nativeactivities
and access physical
device components, such
as sensors and touch
input.

10.  Android Runtime (ART)
is an
application runtime en
vironment used by
the Android operating
system. ... Unlike
Dalvik, ART introduces
the use of ahead-of-
time (AOT) compilation
by compiling entire
applications into native
machine code upon
their installation.

11.  The Android softwar
e stack generally
consists of a Linux
kernel and a
collection of C/C++
libraries that is
exposed through
an application
framework
 It provides services,
and management of
the applications and
run time.

12.  It is the final layer
on top is
application.
 It includes the
home application
the contacts
application,browser
 & apps.

13.  Android is a multi-
processor system in
which each
applications runs in
its own process.
 It is conducive to
the use of third-
party applications
and cloud-based
services.

14. Background Wi-Fi location still runs even when Wi-
Fi is turned off
Developer logging and analyzing enhancements
It optimized for mobile devices.
It enables reuse and replacement of components.
Java supports,media supports,multi touch,video
calling etc…

15.  The small amount of
paid software
on Android phones,
promote the number of
downloading. So
compared iOS with iOS,
in fact, the most
important thing is
whether your own
software is
professional.

16.  Android is a open
sources.
 Multitasking.
 Availability of apps.
 Sup[porting multi
languages.
 Additional hard
ware support.

17.  Need of internet
connection.
 Making source code
available invites the
attention of
hackers.
 Many application of
android contain
virus.
 Consumes more
battery.

18. We hope that the next version of
Android have overcome the actual
Limitations.

19. Any query?

20. THANK
YOU!