Android is a mobile operating system based on a modified Linux kernel. It is an open source software stack that includes an operating system, middleware, and applications. Android was created to enable software development for small electronic devices and to provide a full phone software stack including applications. It uses architectures like a proven driver model, security and memory management, and efficient computing resource management to function as a stable mobile operating system.

2. What is ANDROID ??
• Android is a mobile operating system.
• It is based upon a modified version of
the Linux kernel.
• Android is a software stack:
– Operating system
– Middleware
– Application

3. ϙ Why was it created ?
• Software development.
• Run on very small electronic device.
• Full phone software stack including
applications.
• Android is open & free.

4. ▐ ARCHITECTURE 葶

5. • Proven driver model
• Security, memory & process management
• Efficient computing resource management
• Stable and proven for mobile computing

6. • Written in c/c++ (system c library) libc
• Surface manager: composing different
drawing screens
• SGL : for 2D graphics
• OpenGLES : 3D graphic
• SQLite :a lightweight relational database, is
used for data storage purposes

7. • Includes a set of core
libraries that provide
more functionality.
• Every android application runs on its own
process
• Device can run multiple VM’s efficiently.
• Dalvik VM executable files in the .dex format

8. • Active manager: manages the life cycle of
application
• Contents providers: enable to access data from
other application
• Resource manager: provide access to non code
resources.
• Window manager
• Notification manager

9. ◄ INTRESTING ►
• Unit sales for Android OS smart phones ranked
first among all smartphone OS.(2010)
• There are currently over 100,000 apps available
for Android.
• Android was purchased by Google in 2005.
• Android has native support for multi-
touch which was initially made available in
handsets such as the HTC Hero.

10. The Android Emulator default home
screen
The functions of one system using a
different system, so that the second
system behaves like the first system
Benefits
Emulators maintain the original look, feel, and
behavior of the digital object

11. Conclusion
• Android is a disruptive technology, which was
introduced initially on mobile handsets, but
has much wider potential