Android programming Introduction

1. Android
Programmin
g
P. Sonia Patro

2. Objectives
• Mobile Application Development
(MAD)
• Intro to Android platform
• Platform architecture
• Application building blocks
• Development tools
• Textbook: Hello, Android
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3. Java
Basic Java programming
• Exceptions
• Inner Class, Interface
Advanced topics we will touch:
• Java IO
• Java Thread
• Java Socket
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4. Few reasons to go MAD…
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• Smart Phones
• Internet access anywhere
• Social networking
• Millions of mobile users
• Open standards

5. Introduction to Android
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• 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

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7. Linux Kernel
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• Works as a HAL
• Device drivers
• Memory management
• Process management
• Networking

8. 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

9. Android Runtime
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• 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. Application Framework
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• API interface
• Activity manager – manages application life cycle.

11. Applications
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• Built in and user apps
• Can replace built in apps

12. Activities
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• Typically correspond to one UI screen
• But, they can:
• Be faceless
• Be in a floating window
• Return a value

13. Intent Receivers
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• Components that respond to broadcast ‘Intents’
• Way to respond to external notification or alarms
• Apps can invent and broadcast their own Intent

14. Intents
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GMail
Contacts
Home
Blogger
Client component makes a
request for a specific
action
System picks best
component for that action
New components can use
existing functionality
Blogger
Photo
Gallery

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

16. Services
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• Faceless components that run in the background
• E.g. music player, network download etc…

17. Content Providers
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• 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

18. Summary
We had a little discussion on the
lifecycle of Android and an android
app.
We will discuss all the rest
development tool and its
configuration from the next session.
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19. Thank you
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P. Sonia Patro
soniapatro55@gmail.com