The document provides an overview of Android development including: - The architecture of the Android OS and applications - Tools available in the Android SDK for development - The lifecycle of Android applications - Future developments such as Android Open Accessory Protocol and Google TV

1. Inside Android Sander Alberink 2-9-2011 6 september 2011 www.humiq.nl

2. Agenda Intro to Android development

3. Architecture of the Android OS

4. Architecture of an android application

5. Android future developments

6. About me 6 september 2011 www.humiq.nl Sander Alberink Senior Technical Consultant Android Qt Open Source Working for HUMIQ since 2007 High Tech Embedded Internet 35 years ‘old’ New standards Linux Telecom

7. Show of hands Who owns an Android phone? 27 juni 2011 www.humiq.nl Who has a shipping application in the Android Market? Who has developed for that Android phone?

8. What is Android? Open source OS

9. Developed by Google and Open Handset Alliance

10. Based on Linux kernel and many open source libraries

11. Development done in Java

12. Two flavors AOSP

13. 'With Google'

14. What Android is not It's not another Linux distribution Userland is completely different It is not another J2ME implementation Uses its own optimized VM: Dalvik

15. Does not accept Java Bytecode, but only optimized DEX files

16. Class libraries are similar to Java SE, but not completely compatible

17. Android anatomy 27 juni 2011 www.humiq.nl

18. Linux kernel changes Wake-locks Handles Android Power management Binder IPC Inter process communication system

19. Based on Parcels, allows marshalling objects between processes Ashmem Simpler shared memory implementation

20. Can re-claim shared memory from a crashed program Out-of-memory killer

21. Logger Basis of Android Logcat system

22. Maintains 4 separate log-buffers, exported via adb

23. Dalvik VM Java interpreter with JIT capability

24. Concurrent GC since 2.3

25. 16-bit, register-based Java VM is 8-bit, stack-based Loads DEX files Pre-processed .class files, up to half the original size

26. Optimized for low-memory, low-cpu environment