Making awesome apps
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The document discusses strategies for optimizing mobile app performance, emphasizing the need for timely location updates, efficient data management, and adapting to user behavior and device states. It suggests using fused location data, monitoring battery and connectivity, and implementing adaptive app behaviors for various user experiences. Key recommendations include minimizing data usage, leveraging caching effectively, and employing seamless transactional processes for offline functionality.
Making awesome apps
- 1. From good to awesome
- 4. Always up to date Users don't like to wait. Location updated. Data downloaded from web.
- 5. Always up to date Users don't like to wait. Location updated. Data downloaded from web.
- 6. Find the location fast. Loop through all providers->getLastKnownLoc. If there is one or more location which is recent enough – return the most accurate one If not – Return the latest one. In case of #2 – look for “fastest” provider: Coarse Accuracy && low power consumption. Register for location update.
- 7. Fused Location Define your priorities Let Google play services do the heavy lifting.
- 9. Data updates
- 10. The challenges: When to update? Where the data is coming from? What to update? How to update?
- 11. When to update my App? Right before the user launches it Assuming I have battery. Assuming I have BW.
- 12. Where the data is coming from? My Server 3rd Party Servers
- 13. Where the data is coming from? My Server 3rd Party Servers
- 14. Content Segmentation -What to Update? What's Hot Interesting stuff Other
- 15. BG Update What's Hot BG Update Interesting Stuff Other
- 16. BG Update What's Hot BG Update Interesting Stuff Other GCM Embedded
- 17. BG Update What's Hot BG Update Interesting Stuff Other GCM Embedded GCM + Back-off
- 18. BG Update What's Hot BG Update Interesting Stuff Other GCM Embedded GCM + Back-off Daily / Bundled
- 19. Updating Data from 3rd party servers Monitor the device Use Variable alarms. Use conditional services and receivers. Monitor the user
- 20. Is it worth waking up? Set wake alarm for min update freq. Set non-wake alarm for optimal update freq.
- 21. Monitor device State Change the refresh rate based on device state: Update without connectivity? Update more on WiFi? Update more when charging? Suspend updates on low battery? Update more when docked? Don't update in car dock?
- 23. Monitor Battery
- 24. Monitor State canged BCAST
- 25. Monitor the user Change your behavior based on the user's acitivty Update more when driving? Update more when walking? Pause updates while cycling?
- 30. Being Invisible I don't need to think how the app works. I never notice the app's work. I am never being bothered by the app.
- 31. Work Offline Queue and Send transactions. Use persistence layer. Tape From Square.
- 32. Work Semi-Offline Be resilient to poor networks. Prioritize your transactions. Be able to cancel transaction on the fly, or clear the Queue. Adjust your apps behavior and timeouts accordingly. Use Volley
- 33. Use sync adapter to... sync Sync adapter is great for sending data from the device to your server Has a system wide POV. Poor documentation, Hard to implement.
- 34. Be efficient – Data usage
- 36. Radio State Machine IDLE FACH DCH Power ~10Sec tail time ~12-75 Sec tail time Bandwidth
- 37. IDLE FACH DCH Power ~10Sec tail time ~12-75 Sec tail time ~2 Sec Bandwidth Radio State Machine
- 38. Avoid bursty traffic Transmit data “together”. Piggyback if needed. Pre-fetch data for the next 2-5 minutes. Don't ping just to keep TCP connection alive RRC != TCP Connection. TCP connection is kept even in IDLE mode
- 39. #1: Case study: Pandora Music file streamed as single file. Analytics data sends ~2KB every 62.5 seconds Source: AT&T research
- 40. #1: Case study: Pandora 0.2% of data consumed 46% of energy!
- 41. Don't be HTTP rookie Don't download what you already have. Take care of server headers Max-age, expires. Use conditional GET when cache expires Use “last modified” header. Server return 304, with no body.
- 42. Don't be lazy Read AT&T research: Top Radio Resources Issues in Mobile Applications AT&T Lab Research – call for more efficient apps Watch my latest reversim talk (video / slides ) Use ARO. Developed by AT&T. Monitors and analyze network activity. http://developer.att.com/ https://github.com/attdevsupport/ARO
- 44. Adaptive App Optimized for different User Experience. User has more than one device. Be predictable. Behave as expected
- 45. Text Input Specify the Edit Text input to show the right keyboard type. use android:inputType attribute Four classes of keyboards: Plain text Decimal Number Phone Number Date or Time
- 46. Text Input Plain text types: URIs Email address People's names Postal address Passwords
- 48. Context is critical Activity recognition Location
- 49. GeoFencing
- 50. Personal G+ SSO Login once – on all of your devices. Track the user, not the device
- 52. Geek Magic – Text to Speech
- 53. Geek Magic – Text to Speech
- 54. Geek Magic – Text to Speech
- 55. Geek Magic – Speech Recognition
- 56. Geek Magic – Speech Recognition More than one result is returned. Loop through all results, taking context in mind.
- 57. Summary By Fresh Be Invisible Be Efficient Be Adaptive Be psychic