2. Agenda
• Why Learn Android?
• Prerequisites.
• Android History.
• What is Android?
• Android Architecture.
2
3. Why Learn Android?
• Run your applications on 59% of the smartphones
worldwide (Jul - 2012).
• Join in 600,000 applications for android (Jul - 2012).
• Not just smartphone, Android OS is being used in,
TVs, Microwaves, Car Tapes. Etc…
• High job success rates.
• Create app sell to market very easily.
4.
5. Prerequisites
• Object-oriented programming.
• You must understand terms like (Class, Instance,
Method, Superclass and Subclass).
• Installation of Eclipse IDE & Android SDK Tools.
• Install all SDKs preferably (2.1, 2.2 & 4.x).
• An android device. (Optional but highly
recommended).
6. Android History
• Started by Android Inc. in 2005, which had
been financed by Google.
• In 2007 Google bought Android Inc.
• Android beta was released in Nov 2007.
• Android v1.0 was released in Sep 2008.
• Latest android version is 4.4 (Kitkat).
7.
8.
9. What is Android?
Android is an operating system for mobile
devices such as smartphones and tablet
computers.
Android has beaten Apple iOS, being the
leading mobile operating system from first
quarter of 2011
10. Android Architecture
Android system is composed of following
items:
Linux Kernel.
Libraries.
Applications Framework.
Applications.
11.
12. Android Architecture (Cont’d)
Linux Kernel
Its customized Linux kernel with a lot more
android specific code to support devices.
One of the kernel's main function is to
control hardware.
13. Android Architecture (Cont’d)
Libraries
Webkit
Modern web browser engine used in both
web view as well as native browser.
Support CSS, Java script, DOM, Ajax etc.
14. Android Architecture (Cont’d)
Libraries
Media framework
PacketVideo, openCORE platform.
Support Audio, Video, Still-frame formats.
16. Android Architecture (Cont’d)
Libraries
OpenGL|ES(openGL for EmbeddedSystems)
Standard specification for 2D/3D graphics.
Can simulate physics.
Complex 3D scenes can be drawn.
Used in (Virtual reality, Augmented reality,
Game programming, Scientific visualization and
Flight simulation).
17. Android Architecture (Cont’d)
Libraries
Surface Manager
Manages access to display subsystem.
Seamlessly composites graphic layers 2D/3D
layers from different applications.
18. Android Architecture (Cont’d)
Libraries
SGL (Skia graphic library)
An underlying 2D graphics engine.
Used to draw text, geometries & images.
19. Android Architecture (Cont’d)
Libraries
SSL (Secure Sockets Layer)
Cryptographic protocol to provide
information security over internet.
27. Android Architecture (Cont’d)
Applications Framework
Content Providers
Manage access to structured access of data.
Mainly used for data sharing purposes.
28.
29. Android Architecture (Cont’d)
Applications Framework
View System
Basic building block for UI components.
Can be extended to build custom UI
components.
30. Android Architecture (Cont’d)
Applications Framework
Package Manager
Provides methods for querying and
manipulating installed packages.
31. Android Architecture (Cont’d)
Applications Framework
Telephony Manager
Provides access to telephony services on
android.
Can monitor telephone state changes.
32. Android Architecture (Cont’d)
Applications Framework
Location Manager
Provide access to system location services.
Able to track location periodically or one-
time.
33. Android Architecture (Cont’d)
Applications Framework
Resource Manager
Link external resources to native app at build
time.
Resources may include XML Layouts, Bitmaps,
raw files etc.