Crashing an app 40 times a day - A Developer Story

One of the app I've written, Yote Shin has been crashing a lot. In this presentation, you will learn about the mistakes I've made and the changes that I've made it to be less crash.

Transcript

1. Crashing an app 40 times a day A Developer Story
2. It’s “crash”ing. Not crushing
3. I’m Ye Lin Aung …
4. Programmer @ Zwenexsys
5. The story
6. !ုပ်ရှင်
7. http://www.yoteshinapp.com
8. Android development is easy but making the app resilient is hard. http://www.birbit.com/a-recipe-for-writing-responsive-rest-clients-on-android/
9. It crashes a lot …
10. Minimal Viable Product (MVP)
11. • Functional • Easy to use • Fast
12. User Experience (UX)
13. • Not everyone cares about good user experience. • However, everyone knows what is bad user experience.
14. v1 is very important!
15. Old version ..
16. Things I wish I could change
17. API
18. Decided to go with CSV as an API. 91b940fa29^အဆu$%မ'( အခ*စ,^MM^Drama, Action
 20d74f12a2^EXTREME FOX^HK^Action^
 e4f1fdf037^RAGE^EN^Action
 ce424dbd0b^HERCULES (3D)^EN^Action
 d947924054^TRANSFORMERS : AGE OF EXTINCTION (3D)^EN^Action
 LUCY^EN^Action
19. Fcuking ugly codes
20. • Not the worst the decision. • But …
21. • Fetching, parsing & inserting take ages
22. Skipped 138 frames! The application may be doing too much work on its main thread.
23. • Data structure is not optimized • Consequently, database is bloated
24. Doing heavy calculation during runtime
26. • Terrible app start up time • OutOfMemoryError
27. NullPointerException Error of the Year!
28. Let’s do a proper app, seriously.
29. Yote Shin 3.0
30. Graphic Heavy, Less Texts
32. • More graphic but optimized. • Each image must be less than 50KB!
33. https://github.com/bumptech/glide
34. Proper JSON API
35. http://square.github.io/retrofit
36. Let the server do the heavy lifting
37. Proper Update Flow
38. Google Cloud Messaging (GCM)
39. I hate notifications that ask me to tap, then make me wait
40. GCM ➞ Run Retrofit in background ➞ Show notification
41. Notify each components
42. http://square.github.io/otto
43. Current state
44. It still crashes but a lot less
45. • Constantly improving it • Adding new features • Request us! • Trying out new development patterns
46. Track down each crash and fix it
47. Be passionate Be picky Focus on details
48. Learn from other people source code
49. • Google I/O app ( github.com/google/iosched ) • Chris Banes’s Philm ( https://github.com/ chrisbanes/philm ) • Jake Wharton’s U2020 ( https://github.com/ jakewharton/u2020 )
50. DevCon Myanmar 2014 App Search as “DevCon Myanmar” in Play Store (OR) http://bit.ly/devconmyanmar
51. We’re hiring, always.
52. https://github.com/zwenexsys
53. Thank you <3