Introduction to Android By Oum Saokosal

1. 01. Introduction to Android
Oum Saokosal
Master of Engineering in Information Systems, South Korea
855-12-252-752
oum_saokosal@yahoo.com

2. Reference
• Beginning Android 4, Mark L. Murphy, 2012, Apress.
• Pro Android 4, Sayed Hashimi, Satya Komatineni &
Dave MacLean, 2012, Apress.
• http://www.android.com/
• http://developer.android.com/index.html
• http://source.android.com/
• http://code.google.com/android/

3. Agenda
• Mobile Application Development (MAD)
• Intro to Android platform
• Platform architecture
• Application building blocks
• Development tools
• Hello Android

4. Few reasons to go MAD…
• Smart Phones
– Internet access anywhere, 3G – 3.75G, 4G
– Social networking
– Games, online games
– Booklet, eBook Reader
• Millions of mobile users
• Open standards

5. Android Devices
• Samsung
• Sony
• HTC
• Motorola
• LG

6. Introduction to Android
• Open software platform for mobile
development
• A complete stack – OS, Middleware,
Applications
• Powered by Linux operating system
• Fast application development in Java
• Open source under the Apache 2 license

8. Linux Kernel
• Works as a HAL (Hardware Abstract Layer)
• Device drivers
• Memory management
• Process management
• Networking

9. What is a kernel, by the way?
• The kernel is a bridge between applications
and the actual data processing done at the
hardware level. It is the basic component of
an OS.

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

11. Android Runtime
• Dalvik Virtual Machine (DVM)
– 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 replace built in apps

14. The Emulator

15. The Emulator
• QEMU-based ARM emulator
• Runs the same image as the device
• Limitations:
– No Camera support

16. Hello World
• http://developer.android.com/resources/tutor
ials/hello-world.html
• Generating UIs
– Views – building blocks
– E.g. TextView, EditText, Button
– Placed into Layouts
– E.g. LinearLayout, TableLayout, AbsoluteLayout

17. Application Lifecycle
• Application run in their own processes (VM,
PID)
• Processes are started and stopped as needed
to run an application's components
• Processes may be killed to reclaim resources

19. Notification Manager

20. Notification Manager
• How background app interact with users
• Consistent notification presentation

21. Views

22. Views

23. Location Manager

24. Location Manager

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