Getting started with the Android framework, by Henry Addo at GhanaGTUG Maiden Event on Friday, 5th March 2010.

1. ANDROID
FRAMEWORK
Henry Addo
Twitter: http://twitter.com/eyedol

2. WHAT WE ARE
GOING TO LOOK AT
* What Is Android?
* Architecture Overview.
* Android Software Development.
* Developer Tool Kits.
* Getting started.
* Sample Apps.
* References.

3. WHAT IS ANDROID
* An open platform for mobile computing.
* Its linux based.
* But development is in java.

4. ARCHITECTURE
OVERVIEW
* Power Management
* Security
* Drivers
* Processes Management

5. ARCHITECTURE
OVERVIEW
The libraries provide functionalities.

6. ARCHITECTURE
OVERVIEW

7. ANDROID SOFTWARE
DEVELOPMENT
* Application building blocks
* Application Model
* UI Components

8. APPLICATION BUILDING
BLOCKS
* Activities and Intents
* Broadcast Receivers
* Services
* Content Providers

9. ACTIVITIES
An activity is a screen in your
application.

10. ACTIVITY LIFE CYCLE

11. INTENTS
* An activity communicate with each
other using Intents.
* The Intent is resolved to another
Activity, by matching it against an Intent
Filter.
* Intent conveys Data and Actions.

12. BROADCAST RECEIVERS
* Listens for Intents
* Incoming calls
* Incoming SMS
* Alarms
* Network availability
changes
* Does not display UI
* Uses notifications

13. SERVICES
* Services perform long running activities.
* Services can be manual or automatic.
* Can run in process or in another process
altogether.

14. APPLICATION
MODEL
* Android Package( .apk )
* Compiled code & resources
* Must be signed just like jar.
* Task
* May span activities across several
packages and processes.

15. UI COMPONENTS
* Views
* Simple
* Edit, Button, Checkbox,Radio
* Specialized
* DatePicker, AutoComplete
* ViewGroups
* Relative, Table, Linear
* Web, Video, Map, Gallery

16. DEVELOPER
TOOLKITS
Emulator
* An emulator that runs same system
image as a device
* You could also use the developer
device.

17. DEVELOPER TOOLKITS
Eclipse Plugin - ADT

18. DEVELOPER TOOLKITS
Debugger

19. GETTING STARTED
* The famous “Hello World”
Program provided by the SDK:
*Android Manifest
* Layout file
* Activity source file

20. GETTING STARTED
* Android Manifest file

21. GETTING STARTED
* Layout file

22. GETTING STARTED
* Activity Source file

23. GETTING STARTED
* Built and Running on the
Emulator

24. GETTING STARTED
Accelerator Titanium
You don’t need java to write android apps.
http://www.appcelerator.com/

25. RESOURCES
* Android SDK:
http://developer.android.com/sdk/index.html
* GUI Designer:
http://www.droiddraw.org/
* API Documentation:
http://developer.android.com/reference/android/package-
summary.html
* Developers Mailing List:
http://groups.google.com/group/android-developers

26. REFERENCES
* Android homepage:
http://www.android.com/
* Open Handset Alliance:
http://www.openhandsetalliance.com
* Android Developers Page:
http://developers.android.com/
* Android Open Source:
http://source.android.com/

27. THANK YOU
FOR COMING