An Introduction To Android

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

•Background •What is Android? •Latest News

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

Mobile Operators

Handset Manufacturers Mobile Operators

Handset Manufacturers Software Mobile Operators

Handset Manufacturers Software Mobile Operators Semiconductor

Handset Manufacturers Software Mobile Operators Semiconductor Commercialization

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

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

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

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

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

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.

Developer Toolchain

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

Eclipse Plugin Project template

Debugging Call stack Examine variables Breakpoints, single stepping

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

Industry

•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

Industry

Industry Users

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

Industry Users

Developers Industry Users

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

Integrate

Integrate Extend

Replace

What about security?

What does this mean for developers?

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

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

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An Introduction To Android

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