The document provides an overview of the Android operating system, including its history, fragmentation across devices, and widespread dissemination. It describes Android's core components like the Linux kernel and Dalvik virtual machine. The document also outlines the free and open development tools for Android and demonstrates building a simple app both in Eclipse and via a visual editor.

1. Android OS
Simon Heinen, Sophia Krause, Andreas Molitor, Artur Nowak
The slides are licensed under a
1 Web Technologies – Prof. Dr. Ulrik Schroeder – WS 2010/11 Creative Commons Attribution 3.0 License

2. Overview
 Android OS
 History
 Fragmentation
 Dissemination
 Android Apps
 Composition
 Development
 Live Demo
 Summary
 Literature
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3. Android OS
 Operation System for Mobile Devices
 Based on Linux-Kernel
 Dalvik Virtual Machine
 Open Source
 Product of the Open Handset Alliance (OHA)
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4. Android OS
 Supports the following features
 Wireless exchange of information
 GSM/EDGE, UMTS, bluetooth, W-LAN, near field communication
 Web-Browser: 93/100 (Acid3-Test)
 Audio-, Video-, Picture-Codecs
 H.263, H.264, MPEG-4, AAC, MP3, OGG, JPEG, PNG, BMP, …
 touchscreen (multitouch)
 Determination of location and movement
 GPS, acceleration sensor, magnetometer, barometer, gyroscope
 VoIP
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5. History
 09.02.2009: Version 1.1
 30.04.2009: Version 1.5 (Cupcake)
 15.09.2009: Version 1.6 (Donut)
 26.10.2009: Version 2.0 (Eclair)
 03.12.2009: Version 2.0.1
 12.01.2010: Version 2.1
 20.05.2010: Version 2.2 (Froyo)
 06.12.2010: Version 2.3 (Gingerbread)
 Q1 2011: Version 2.4 (Honeycomb)
 Q3/4 2011: Version 3.0 (Icecream)
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6. Fragmentation
Platform Distribution
Android 1.5 4.7%
Android 1.6 7.9%
Android 2.1 35.2%
Android 2.2 51.8%
Android 2.3 0.4%
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7. Dissemination
 Market share US smart phone market
Shipments by OS vendor, Q3 2010
Microsoft Others
3% 3%
RIM
24% OHA
44%
Apple
26%
 300.000 Android phones activated every day
 110.000.000 phones next year
 More than 200 different devices
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8. Dissemination
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9. Android Composition
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10. Android Development
 Free and open source Android SDK and NDK available
 Integration into Eclipse
 No development or publishing costs
 Debugging tools
 DDMS
 Android Emulator
 …
 App-Inventor
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11. Development in Eclipse
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12. Development in Eclipse
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13. Development in Eclipse
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14. Live Demo
Live Demo
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15. AppInventor
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16. Live Demo
Live Demo
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17. Summary
 Android
 Based on Linux-Kernel (2.6.x)
 Dalvik Virtual Machine
 Open Source
 >200 different devices
 Development
 Fragmentation (Android-Versions, different devices)
 Java, C/C++
 Full access to framework
 Access to libraries only through framework API
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18. Literature
 Tutorials, Forum, Demo, …
 http://www.anddev.org/
 AppInventor: http://www.youtube.com/watch?v=xR90pekj8CQ
 Links
 Android: http://www.android.com/
 Android Development: http://developer.android.com
 AppInventor: http://appinventor.googlelabs.com/about/
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