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Android Bird’s of a Feather Meeting

Android Bird’s of a Feather Meeting. Tim Bird CELF Architecture Group Chair. Agenda. Android - basic intro Hot or Not Questions How to collaborate References. 2. Android – Basic Intro. Android – Basic Intro. Android

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Android Bird’s of a Feather Meeting

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  1. Android Bird’s of a Feather Meeting Tim Bird CELF Architecture Group Chair

  2. Agenda Android - basic intro Hot or Not Questions How to collaborate References 2

  3. Android – Basic Intro

  4. Android – Basic Intro • Android • Linux-based OS mainly developed by Google, now deployed in mobile phones worldwide • Is a new platform, not based on any existing Linux distribution • Kernel + Google stuff • Bionic libc • Dalvik JVM • Class libs galore 4

  5. What interesting features of Android should we adopt as an embedded Linux community? Hot or Not?

  6. Kernel stuff • Binder – new IPC mechanisms • Wake locks – ability to hold the machine “awake” • Turns power management on it’s head • Default state of machine is off, and apps have to assert a lock to keep it awake • amem 6

  7. User-space • Init • New • Bionic • Small footprint, custom-purpose, C library • Has it’s own threading model • No support for multi-user • Native libraries • ???

  8. Build system • Repo • Multi-project source management tool • Wrapper for ‘git’ for 100 repositories • Build system (Android makefiles) • Doesn’t build kernel!! • Doesn’t keep patches separate • Pre-built toolchains

  9. Development tools • Adb – Android Debug Bridge • Host/target control program • Emulator • Can develop and test some applications prior to device availability • Eclipse integration • Logger

  10. File system layout • Recovery • System • Data • SDcard

  11. Java • Dalvik

  12. User-space pieces • OpenGL • App Manager • Application lifecycle • Flash support?

  13. Apps • Market • Browser (webkit?) • Maps • YouTube

  14. How to collaborate • Google doesn’t always welcome contributions • Ex: I haven’t signed their license agreement • My suggestion: • Use e-linux wiki for non-Google sanctioned information and patches • Can use existing Google lists, unless google people complain (?)

  15. Questions and Discussion

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