This document provides an introduction and overview of the Android mobile operating system. It discusses Android's open source nature, its components including the Linux kernel and Dalvik virtual machine, the developer tools and SDK, and how developers can build applications and integrate with, extend, and replace existing Android components. The document also provides an update on the latest Android news including the announcement and early SDK releases, the Android Developer Challenge program, and upcoming SDK and device releases.

1. An Introduction to Android
Jason Chen
Developer Advocate
Google I/O 2008

2. •Background
•What is Android?
•Latest News

4. Internet and Mobile Phone Users, Worldwide
4,000,000,000
3,000,000,000
2,000,000,000
1,000,000,000
0
2000 2001 2002 2003 2004 2005 2006 2007
Internet users (PC-based) Source: International Telecommunication Union
Mobile phone users

6. Mobile Operators

7. Handset Manufacturers
Mobile Operators

8. Handset Manufacturers
Software
Mobile Operators

9. Handset Manufacturers
Software
Mobile Operators
Semiconductor

10. Handset Manufacturers
Software
Mobile Operators
Semiconductor
Commercialization

11. •Background
•What is Android?
•Latest News

12. Linux Kernel
Display Camera Driver Bluetooth Flash Memory Binder (IPC)
Driver Driver Driver Driver
USB Driver Keypad Driver WiFi Driver Audio Power
Drivers Management

13. Libraries
Surface Manager Media SQLite
Framework
OpenGL | ES FreeType WebKit
SGL SSL libc
Linux Kernel
Display Camera Driver Bluetooth Flash Memory Binder (IPC)
Driver Driver Driver Driver
USB Driver Keypad Driver WiFi Driver Audio Power
Drivers Management

14. Libraries Android Runtime
Surface Manager Media SQLite Core Libraries
Framework
OpenGL | ES FreeType WebKit Dalvik Virtual
Machine
SGL SSL libc
Linux Kernel
Display Camera Driver Bluetooth Flash Memory Binder (IPC)
Driver Driver Driver Driver
USB Driver Keypad Driver WiFi Driver Audio Power
Drivers Management

15. Application Framework
Activity Manager Window Content View Notification
Manager Providers System Manager
Package Manager Telephony Resource Location GTalk Service
Manager Manager Manager
Libraries Android Runtime
Surface Manager Media SQLite Core Libraries
Framework
OpenGL | ES FreeType WebKit Dalvik Virtual
Machine
SGL SSL libc
Linux Kernel
Display Camera Driver Bluetooth Flash Memory Binder (IPC)
Driver Driver Driver Driver
USB Driver Keypad Driver WiFi Driver Audio Power
Drivers Management

16. Applications
Home Contacts Phone Browser ...
Application Framework
Activity Manager Window Content View Notification
Manager Providers System Manager
Package Manager Telephony Resource Location GTalk Service
Manager Manager Manager
Libraries Android Runtime
Surface Manager Media SQLite Core Libraries
Framework
OpenGL | ES FreeType WebKit Dalvik Virtual
Machine
SGL SSL libc
Linux Kernel
Display Camera Driver Bluetooth Flash Memory Binder (IPC)
Driver Driver Driver Driver
USB Driver Keypad Driver WiFi Driver Audio Power
Drivers Management

17. Application Building Blocks
UI component typically corresponding to
Activity
one screen.
Set and respond to notifications or status
IntentReceiver
changes. Can wake up your app.
Service Faceless task that runs in the background.
ContentProvider Enable applications to share data.

18. Developer Toolchain

19. Emulator
• QEMU-based ARM emulator
runs same system image as
a device
• Use same toolchain to work
with devices or emulator

20. Eclipse Plugin
Project template

21. Debugging
Call stack
Examine variables
Breakpoints, single stepping

22. What does open mean?
Photo by: http://flickr.com/photos/virtualsugar/316200555/

24. Industry

25. •Software stack open-
sourced under Apache 2.0
license
Industry •Source available after first
handsets ship
•Anyone will be able to
build a system image

26. Industry

27. Industry Users

28. •Users have control of
their experience
Industry •They control what gets Users
installed
•They choose the defaults

29. Industry Users

30. Developers
Industry Users

31. Developers
•Don’t need permission to
ship an application
•No hidden or privileged
Industry framework APIs Users
•Can integrate,
extend, and replace
existing components

33. Integrate

34. Integrate

35. Integrate

36. Integrate Extend

37. Integrate Extend

38. Replace

39. Replace

40. Replace

41. Replace

42. Replace

44. What about security?

45. What does this mean
for developers?

46. •Background
•What is Android?
•Latest News

47. Latest News
• 5 Nov 2007: Android announced
• 12 Nov 2007: early look of the SDK released
• 14 Dec 2007: bug-fix SDK released
• 3 Jan 2008: Android Developer Challenge I starts accepting
submissions
• 13 Feb 2008: m5-rc15 SDK released
• 14 Apr 2008: 1788 total submissions for Challenge I
• 12 May 2008: Top 50 Application in Challenge I announced

48. Android Developer Challenge
• Goal: help developers turn great ideas into great code
• Challenge I & II each have a $5MM USD purse
• Challenge II will begin after devices go on sale

49. Q &A