This is just only the fundamentals of the Os.

2.  Introduction
 Features
 Architecture
 Application components
 Activating components
 Guidelines
 Bestpractice
 Application developed on Android
 Conclusion

3.  Open software platform for mobile
development
 A complete stack – OS, Middleware,
Applications
 An Open Handset Alliance (OHA) project
 Powered by Linux operating system
 Fast application development in Java
 Open source under the Apache 2 license

4.  Handset layout
 Storage
 Connectivity
 Messaging
 Multiple language support
 Web browser
 Java support
 Media support
 Multi touch
 Video calling
 External storage

6. Built in and user apps
Can replace built in apps

7. API interface
Activity manager – manages application life
cycle.

8.  C/C++ libraries
 Interface through Java
 Surface manager – Handling UI Windows
 2D and 3D graphics
 Media codecs, SQLite, Browser engine

9.  Dalvik VM
– Dex files
– Compact and efficient than class files
– Limited memory and battery power
 Core Libraries
– Java 5 Std edition
– Collections, I/O etc…

10.  Works as a HAL
 Device drivers
 Memory management
 Process management
 Networking

11. Applicationcomponents are:
Activities
Services
Contents
Broadcast receivers

12.  Indents
 Method for activating Components
startActivity() or startActivityForResult
Intent to startService()or
Intent to bindService().
sendBroadcast(),or sendStickyBroadcast()
sendOrderedBroadcast ()
query() on a ContentResolver

13. Guidelines for creating an application
are as follows:
Build your activity designs based on
fragments
Use the action bar
Implement flexible layouts

14. Design for security
Design for compatibility
Design for Accessibility services
Design for Responsiveness

15.  In September 2008, Motorola confirmed that it
was working on hardware products that would
run Android.
 Huawei Technologies is planning to launch
smart phones that would run Android in Q1
2009.
 Lenovo is working on an Android-based
mobile phone that supports the Chinese 3G
TD-SCDMA standard.

16.  HTC is planning a "portfolio" of Android based
phones to be released summer of 2009.
 Sony Ericsson is planning to release an Android
based handset in the summer of 2009.
 Samsung plans to offer a phone based on Google’s
Android operating system in the second quarter of
2009.
 GiiNii Movit Mini is a Internet device based on
Google's Android operating system

17. we concluded that the Androids platform which
has developed by Google is going to play
major role in Mobile applications because as it
is an open source and it is also easy to develop
mobile applications using Android as because
in order to develop these applications all the
APIs are available and these APIs are as same
as java APIs which are easy to understand.