Droid con
- 1. Things I wish I knew Hard Earned Android Programming Experiences Kashif
- 2. Directi • We do exciting work • Mobile • Desktop • Server • Internet scale • We have a fun CEO • We even have stall Join Directi
- 3. Talk.to Communication software ● Android, iPhone, BB ● Desktop, Web ● In person ● All services ● FB, Gmail, Yahoo, MSN, etc... ● All channels ● SMS ● VOIP ● Video ● Chat
- 4. Use Native 1
- 5. Use Native ● Webstuff and HTML5 sucks for mobile dev ● Not complete ● Not performant ● Lots of corner cases ● Typically poor code quality ● http://slidesha.re/g68sCY
- 7. Debugging ++ ● Use DDMS ● Memory Leaks ● Thread Leaks ● Dominator Graph – MAT not JHat ● TraceView startMethodTracing – 8 MB limit ● Application Crash Report for Android (ACRA) ● http://code.google.com/p/acra/ ● Send yourself a crash report – automatically ● Easy, awesome, indispensible ● Debug Logs – ACRA or logcat
- 9. Always remember Memory ● Don't cache too much ● Statics can screw with memory ● Soft References ● Garbage Collection (tool for analyzing rate) ● Reuse – unlike OOP Compilers ● Release on LowMemory you may not die
- 10. Services get collected 4
- 11. Services get collected ● You don't need a service ● Android kills you ● Users kill you ● Use C2DM and AlarmManager
- 12. Focus on the right devices 5
- 13. Focus on the right devices ● Foolish feedback loop ● Low End Devices ● All screen sizes ● Relative Layouts ● You don't have to support everything
- 15. Everything is customizable ● ListItems, ● Tabs, ● Buttons, ● Title Bars, ● Edit Text, ● Dropdowns, ● Keyboards, ● Checkbox, ● DialogBox, ● Radiobuttons, ● Life...
- 16. The database is slow 7
- 17. The database is slow ● Batch Reads ● Don't read single values ● Batch Writes ● not really – but single compile ● DatabaseUtils.InsertHelper ● UI Interaction underway – defer DB ● Worry about schema migration
- 18. Networking eats battery 8
- 19. Networking eats battery ● Raj VijayKumar at Qualcomm ● Android radio set to dormant after 10 seconds ● Multiplex sockets ● Prefer native TCP ● Use Push
- 20. Monitoring etc... 9
- 21. Monitoring etc... ● We used Google Analytics and that sucked ● Flurry is cool ● SDK ● Other demographic data ● Events ● Customized for mobile at all levels ● MonkeyRunner
- 22. Questions? kashifrazzaqui @ kashif.ra@directi.com