3. Open Handset Allianceentire source code (including
Google published the (OHA), a business alliance of
79 firms for developing open standardsan Apache
The first commercially stacks) under for mobile
network and telephonyphone to run the Android
GOOGLE acquired Android Inc., a small startup
devicesPalo formed.
was was
company based inLicense. California, USA.
operating systemAlto, released
July November September October
2005 2007 2008 2008

4. UNDERSTANDING
UNDERSTANDING
UNDERSTANDING
UNDERSTANDING UNDERSTA
UNDERSTANDING
ERSTANDING
UNDERSTANDING
UNDERSTANDING
NDERSTANDING
UNDERSTANDING
UNDERSTANDING UNDE

5. N
DEFINITI
Android is a mobile operating based
upon a modified version of the Linux
kernel.

6. CONNECTIVITY
MISCELLANEOUS
DEVELOPMENT
Google provides a device
Android has approximately 3,10,000 SP
H.263 H.264 AVC MPEG-4
emulator, tools for
3GPP 3GPP 3GPP
applications available for download.
MPEG-4 MPEG-4
debugging, memory and
MEDIA
performance profiling.
FEATURES
Android has native support for multi-
BMP PNG
touch
JPEG GIF
The integrated development
environment (IDE) is provided in
AndroidEclipse by tethering, Android
supports using the which allows
a phoneAACbe used asTools (ADT)
to LC/LTP AMR-NB
Development a wireless/wired
MIDI
hotspotHE-AACv1
Plugin. AMR-WB Ogg
HE-AACv2 MP3 WAVE

7. ARM Native Code
CODE
C++ (Library)
C (Core)
NATIVE
Java (UI)

9. Applications are the process through which
user give instructions to the system to
accomplish task and obtain results.
Android applications can consist of four
components:-
• Activities
• Services
• Broadcast Receivers
• Content providers
Applications are saved with extension .apk .
Android applications are written in the Java
programming language .

10. • Application framework provides the resources required for
working of the applications.
• Framework is designed to simplify the reuse of components;
any application can publish its capabilities and any other
application may then make use of those capabilities (subject
to security constraints enforced by the framework).
• Framework is designed in the same hierarchy as the java
development kit.
• It is available to developers in android software development
kit.

11. Android includes a set of C/C++ libraries used by various components of the
Android system. These capabilities are exposed to developers through the
Android application framework. It has following components:-
• System C library – It manages access to the display the standard
• Surface Manager– A BSD-derived implementation ofsubsystem. C
system library (libc).
• Webkit – A modern web browser engine which powers both the Android
• browser and an embeddable on PacketVideo's OpenCORE; the libraries
Media Libraries – It is based web view.
support audio, video and image files.
• FreeType - Bitmap and vector font rendering.
• SGL - The underlying 2D graphics engine.
• SQLite - A powerful and lightweight relational database engine available
to all applications.

12. • Android relies on Linux version 2.6 for core system
services.
• The kernel also acts as an abstraction layer between the
hardware and the rest of the software stack.
• Android is not linux because it does not implements some
of the stand feature and protocols of linux.
• It uses permission based security model.
• Special features like OOM, wakelock have been added to
kernel by google.

14. A virtual machine (VM) is a software implementation
of a machine (i.e. a computer) that executes
programs like a physical machine.

15. TYPES OF VIRTUAL MACHINE
System
Process Virtual Machine

17. R1
R3
R2

18.  It Can run on slow CPU, with little ram & in OS with lesser
or even without swap space
 It is optimized to use less space
 The interpreter is simplified for faster execution
 Dalvik (Register based) take average 47 % less executed VM
instruction then JVM (Stack based).

19. THANK YOU