Android Overview Andreas Jakl

Android Overview v1.0 – May 07, 2009 1 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Contents Smartphone Platforms p ● Android ● − Handsets − Development − Main Concepts − Market 2 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

About me: Andreas Jakl About me: Andreas Jakl Assistant Professor at the ● Upper Austria University of Applied Sciences, Campus Hagenberg p g g since 2006 Own company: Own company: ● Mopius 3 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Smartphone Platforms Smartphone Platforms 4 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Google Android Google Android Developed by the p y ● Open Handset Alliance − Based on Linux Based on Linux − Free licensing − G1 (HTC) in the market now http://www.openhandsetalliance.com/ p // p / ● 5 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Open Handset Alliance Open Handset Alliance ~50 technology / mobile companies gy / p ● Founded: November 2007 ● Involvement: ● − Ensure compatibility p y − Bring in intellectual property − Manufacture handsets Manufacture handsets http://www.openhandsetalliance.com/ ● 6 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Handset Manufacturers Handset Manufacturers 7 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Handsets T‐Mobile G1 HTC Magic Samsung i7500 (June 2009) (June 2009) 8 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Android: Development Android: Development Development p ● − Based on Java (Eclipse‐Plugin) − Own Virtual Machine by Google (Dalvik) by Google (Dalvik) 9 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Emulator QEMU ● − Generic and open source machine emulator and virtualizer − http://bellard.org/qemu/ Android‐Emulator ● − QMEU‐based (for ARM) − Runs same system image as devices Runs same system image as devices Use the same toolchain for emulator & devices 10 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Linux Kernel Linux Kernel Why a Linux Kernel? y ● − 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 ● 11 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Java vs. C Java vs. C++ 12 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Replacing & Reusing Components Replacing & Reusing Components Client component makes a request for a specific action ● − “Pick a picture” request is called “Intent” System picks best component for that action ● − 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. 13 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Intents Commonly used in the system y y ● Display web page Send SMS Pick a Show picture location Send email Edit Go home contacts 14 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Application Lifecycle Application Lifecycle Application lifecycle is managed ● by the system Application start/stop is transparent ● to the user t th End‐user only sees that they are moving ● 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 15 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Android Market Android Market Register with Google account g g ● $25 registration fee ● Payment? ● − Free: no fee − Otherwise: 30% go to Google http://market.android.com/publish http //market android com/p blish ● 16 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Operator Stores Operator Stores Android applications also available through t‐zones Austria! pp g 17 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Online Android.com Portal to all resources Android Market Open Source Project Developers 18 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Contact: andreas.jakl@fh‐hagenberg.at Thanks for your attention. y 19 Andreas Jakl, 2009 FH Hagenberg – Mobile Computing

Android Overview Andreas Jakl

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