Introduction to Android development for beginners.

1. INTRODUCTION
TO
ANDROID
By - Ilyas Ahamed

2. What is Android ?

3. Android is a Linux-based operating system for
mobile devices such as smartphones and
tablets.
It is developed by the Open Handset Alliance,
led by Google.

4. More about Android…
• Android, Inc. was founded in Palo Alto,
California, United States in October 2003
by Andy Rubin.
• Over 600,000 and more applications
available in Android Market.
• Open software platform for mobile
development.

5. Why choose Android ?

6. Android Versions
Cupcake - 1.5
Eclair - 2.0, 2.1
Froyo - 2.2
Gingerbread - 2.3.0
Honeycomb - 3.0
IceCream Sandwitch - 4.0
Jelly Beans - 4.1

7. Architecture

9. Linux Kernel
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•
Device drivers
Memory management
Process management
Networking

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

11. Android Runtime
•Dalvik VM
– Compact and efficient than class files
– Limited memory and battery power
•Core Libraries
– Java 5 Std edition
– Collections, I/O etc…

12. Application Framework
• API interface
• Activity manager – manages application
life cycle.

13. Applications
• Built in and user apps
• Can create your own apps

14. Application Components
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•
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Activities
Services
Content Providers
Broadcast receivers

15. Activities
An activity represents a single screen with a
user interface.
For example, an contacts application.

17. Services
A service is a component that runs in the
background to perform long-running
operations.
– E.g. music player, network download etc…

18. Content Providers
• Enables sharing of data across
applications
– E.g. address book, photo gallery
• Provides uniform APIs for:
– querying
– delete, update and insert.
• Content is represented by URI and MIME
type

19. Broadcast Receivers
• Components that respond to broadcast
‘Intents’
• Way to respond to external notification or
alarms
• Apps can invent and broadcast their own
Intent
intent is an abstract description of an operation to
be performed

21. Development Tools
• Eclipse
• Android SDK
developer.android.com

22. References
http://developer.android.com
http://sites.google.com/site/io