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 Bluetooth Flash Memory Binder (IPC)
Camera Driver
Driver Driver Driver Driver
Audio Power
USB Driver Keypad Driver WiFi Driver Drivers Management

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

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

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

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