1. Android
Overview
v1.0 – May 07, 2009
1 Andreas Jakl, 2009
FH Hagenberg – Mobile Computing
2. Contents
Smartphone Platforms
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Android
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− Handsets
− Development
− Main Concepts
− Market
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FH Hagenberg – Mobile Computing
3. About me: Andreas Jakl
About me: Andreas Jakl
Assistant Professor at the
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Upper Austria University of Applied Sciences,
Campus Hagenberg
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since 2006
Own company:
Own company:
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Mopius
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FH Hagenberg – Mobile Computing
4. Smartphone Platforms
Smartphone Platforms
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FH Hagenberg – Mobile Computing
5. Google Android
Google Android
Developed by the
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Open Handset Alliance
− Based on Linux
Based on Linux
− Free licensing
− G1 (HTC) in the market now
http://www.openhandsetalliance.com/
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FH Hagenberg – Mobile Computing
6. Open Handset Alliance
Open Handset Alliance
~50 technology / mobile companies
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Founded: November 2007
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Involvement:
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− Ensure compatibility
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− Bring in intellectual property
− Manufacture handsets
Manufacture handsets
http://www.openhandsetalliance.com/
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FH Hagenberg – Mobile Computing
7. Handset Manufacturers
Handset Manufacturers
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FH Hagenberg – Mobile Computing
9. Android: Development
Android: Development
Development
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− Based on Java
(Eclipse‐Plugin)
− Own Virtual Machine
by Google (Dalvik)
by Google (Dalvik)
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FH Hagenberg – Mobile Computing
10. Emulator
QEMU
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− Generic and open source machine
emulator and virtualizer
− http://bellard.org/qemu/
Android‐Emulator
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− QMEU‐based (for ARM)
− Runs same system image as devices
Runs same system image as devices
Use the same toolchain for
emulator & devices
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FH Hagenberg – Mobile Computing
11. Linux Kernel
Linux Kernel
Why a Linux Kernel?
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− Has been around for a long time
( stable))
− But: thoroughly optimized by Google for
mobile devices
− Provides: hardware abstraction, driver
model, security, memory & process
management, networking
Linux not accessible for the user
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FH Hagenberg – Mobile Computing
12. Java vs. C
Java vs. C++
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FH Hagenberg – Mobile Computing
13. Replacing & Reusing Components
Replacing & Reusing Components
Client component makes a request for a specific action
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− “Pick a picture” request is called “Intent”
System picks best component for that action
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− Built‐in Pictures application
− Can be replaced with another application
− New components can use existing functionality
Home Share on Ovi
Pick a
picture
Contacts
Ctt Pictures
Pi t
Your app.
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FH Hagenberg – Mobile Computing
14. Intents
Commonly used in the system
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Display
web page
Send SMS
Pick a Show
picture location
Send
email Edit
Go home
contacts
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FH Hagenberg – Mobile Computing
15. Application Lifecycle
Application Lifecycle
Application lifecycle is managed
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by the system
Application start/stop is transparent
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to the user
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End‐user only sees that they are moving
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between screens
between screens
− Users shouldn’t have to think about
memory for applications on a mobile device
− Virtual memory would be problematic –
flash is slow
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16. Android Market
Android Market
Register with Google account
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$25 registration fee
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Payment?
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− Free: no fee
− Otherwise: 30% go to Google
http://market.android.com/publish
http //market android com/p blish
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FH Hagenberg – Mobile Computing
17. Operator Stores
Operator Stores
Android applications also available through t‐zones Austria!
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FH Hagenberg – Mobile Computing
18. Online
Android.com
Portal to all resources
Android Market Open Source Project
Developers
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FH Hagenberg – Mobile Computing
