Android Overview
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Android is an open source mobile operating system based on a modified version of the Linux kernel. It uses Java programming languages and libraries. Google acquired Android in 2005 and launched the Open Handset Alliance in 2007 to develop open standards for mobile devices, with Android as their first product. The document then provides details on the fast iteration of Android versions, its features, example hardware models like the Google Nexus One and HTC Legend, software development using Eclipse and the Android SDK, restrictions of the Android Java environment, and the Android Market app store.
Android Overview
- 1. Android Overview Jussi Pohjolainen Tampere University of Applied Sciences
- 2. Intro to Android • Android is a mobile opera?ng system using modified version of the Linux Kernel • Developers write apps using Java language and Google Java libraries • 2005: Google acquired Android (small company) • 2007: Open Handset Alliance, goal to develop open standards for mobile devices – First product: Android
- 3. Versions • Fast itera?on of versions: – April 2009: Version 1.5 – September 2009: Version 1.6 – October 2009: Version 2.0 and 2.1 • On January 2010, SDK 2.1 was released
- 4. Android Features • Storage: SQL Lite • Connec?vity: GSM/EDGE, CDMA, EV-‐DO, UMTS, Bluetooth, wifi • Messaging: SMS, MMS • Web Browser: WebKit (HTML5 support) • Java: Dalvik Virtual Machine • Media support: H.264, H.263, MPEG-‐4 SP, AMR, AMR-‐ WB, AAC, HE-‐AAC, MP3, MIDI, OGG Vorbis, WAV, JPEG, PNG, GIF, BMP • Hardware support: touchscreen, gps, accelerometer...
- 5. Hardware • End of 2009: 18 phone models • 2010: Several phone models coming • Android 2.1 models: – Google Nexus One – Motorola Droid • Coming in 2010 (2.1) – Samsung Halo i8520 – HTC Desire – HTC Legend – Acer Liquid e
- 6. Example: Google Nexus One • Smartphone developed by Google and HTC • Available aeer Jan 5th in selected countries (Not Finland yet..) • 800 x 480 pixel AMOLED screen • 5 megapixel camera with LED flash • GPS, Accelerometer, compass, Wi-‐Fi, Bluetooth 2.1, GSM/ EDGE/HSDPA • Micro SD Card • Android 2.1
- 7. Example: HTC Legend • Smartphone developed by HTC • 320 x 480 pixel AMOLED capaci?ve touch screen • 5 Megapixel camera • Android 2.1 • microSD memory card • GPS, Sensors, 3G, Wi-‐fi, Bluetooth 2.1, etc • Available on 1st April 2010
- 8. Soeware Development • Na?ve programming language: Java • Development environment for Windows, Linux and Mac OS X • Eclipse support via the Android Development Tools (ADT) plugin – You can use whatever tools you like (command-‐ line)
- 9. Eclipse and Android SDK
- 10. Restric?ons • Android Java is not standard Java (!= Java SE or Java ME) – Android reuses the syntax of Java • Compa?bility issues between 1.5 and 1.6 • Garbage collec?on and responsive issues • No bluetooth file exchange, video call or na?ve Java ME
- 11. Android Market • Android Market is an online soeware store develope by Google • App "Market" preinstalled on some Android devices • December 2009: over 20000 apps – iTunes App Store, Jan 2010: 140 000 apps • Developer gets 70% of the app price • Price apps are currently available on selected countries (no Finland..) • Android apps can be obtained from anywhere (websites, e-‐mail etc)