Android is an open source software platform used for mobile device development. It is developed by the Open Handset Alliance and powered by the Linux operating system. The Android software stack consists of four main layers - the application layer, application framework, libraries/runtime, and kernel. Key components for application development include activities, intent receivers, services, and content providers. Activities correspond to screens, intent receivers respond to notifications, services run in the background, and content providers share data across apps. Android offers advantages like customization, notifications, hardware choice, and a large app market. It also faces challenges like inconsistent app designs and battery life issues.

1. Android
Application Development

2. INTRODUCTION TO ANDROID
 Open software platform for mobile development
 An Open Handset Alliance (OHA) project
 Powered by Linux operating system
 Fast application development in Java
 Open source under the Apache 2 license

3. OPEN HANDSET ALLIANCE
 The open handset alliance(OHA) is a business alliance
of firm to develop open standard for mobile devices.
 Devoted to advancing open standards for mobile
devices
 Develop technologies that will significantly lower the
cost of developing and distributing mobile devices and
services.

4. ANDROID ARCHITECTURE
The software stack is split into Four
Layers:
1. The application layer
2. The application framework
3. The libraries and runtime
4. The kernel

6. APPLICATION BUIDING BLOCKS
1.Activity
2.IntentReceiver
3.Service
4.ContentProvider

7. ACTIVITIES
a. Typically correspond to one UI screen
b. But, they can:
Be faceless
Be in a floating window
Return a value

8. IntentReceivers
a. Components that respond to broadcast
‘Intents’
b.Way to respond to external notification
or alarms
c. Apps can invent and broadcast their own
Intent

9. INTENTS
a. Think of Intents as a verb and object; a
description of what you want done
E.g. VIEW, CALL, PLAY etc..
b. System matches Intent with Activity that can
best provide the service
c. Activities and IntentReceivers describe what
Intents they can service

10. SERVICES
Faceless components that run in the
background
E.g. music player, network download etc…

11. ContentProviders
• 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

12. DEVELOPMENT TOOLS
a. Eclipse or Android Studio
b. Android SDK 2.0 or higher
c. The AVD Manager

13. THE EMULATOR
a. Runs the same image
as the device
b. Limitations:
No Camera support

14. APPLICATION LIFECYCLE
• Application run in their own processes .
• Processes are started and stopped as needed to
run an application's components
• Processes may be killed to reclaim resources

16. Views

17. FEATURES OF ANDROID
• Background Wi-Fi location still runs even when
Wi-Fi is turned off
• Developer logging and analyzing enhancements
• It is optimized for mobile devices.
• It enables reuse and replacement of components.
• Java support ,media support, multi touch, video
calling,multi tasking ,voice based features, screen
capture, camera ,bluetooth,gps,compass and
accelerometer,3G

18. a. The ability for anyone to customize the Google Android
platform
b. It gives you better notification.
c. It lets you choose your hardware.
d. It has better app market(1,80,000 application)
e. A more mature platform
f. With the support of many applications, the user can
change the screen display.
g. Supports all Google services: Android operating system
supports all of Google services ranging from Gmail to
Google reader. all Google services can you have with one
operating system, namely Android.
ADVANTAGES

19. DIS-ADVANTAGES
a. Android Market is less control of the manager,
sometimes there are malware.
b. Wasteful Batteries, This is because the OS is a lot
of "process" in the background causing the
battery quickly drains.
c. Sometimes slow device company issued an official
version of Android your own .
d. Extremely inconsistence in design among apps.
e. Very unstable and often hang or crash.

20. CONCLUSION:
a. Android is a truly open, free development platform
based on Linux and open source. Handset makers
can use and customize the platform without
paying a royalty
b. Android is open to all: industry, developers and
users.
c. Participating in many of the successful open
source projects .
d. Aims to be as easy to build for as the web.
e. Google Android is stepping into the next level of
Mobile Internet

21. REFERENCE
[1]. Hewlett-Packard Education Services Notes
[2]. Android Developers Webpage-
http://developer.android.com/develop/index.html
[3]. Tutorials Point Webpage-
http://www.tutorialspoint.com/android/index.htm
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22. THANK YOU