The document introduces the Android platform, describing its architecture including the Linux kernel, libraries, Android runtime, and application framework. It also discusses the basics of developing Android applications, covering tools like the emulator, building user interfaces with views and layouts, and key services like the notification and location managers. The document provides an overview of developing for Android and some of its core components.

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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