AndroidXに潜む便利なヤツら

1. AndroidXʹજΉศརͦ͏ͳϠπΒ @takuji31 Mobile Act KYOTO #1
2. ࣗݾ঺հ
3. ࣗݾ঺հ • @takuji31 id:takuji31 • Takuji Nishibayashi • Hatena Co., Ltd. • App Team • ίϛοΫDAYS • δϟϯϓϧʔΩʔʂ • ΧΫϤϜ
4. ࣗݾ঺հ • Android • Kotlin • Flu-er • ! h-ps:/ /blog.takuji31.jp • " h-ps:/ /nazuna.takuji31.jp • # $ h-ps:/ /photo.takuji31.jp
5. AndroidX
6. LiveData? ViewModel? AppCompat? Naviga5on
7. ࢖ͬͯ·͢ΑͶ
8. ศརͳ΍ͭ৭ʑ঺հ͠·͢
9. α൛ͷ΋ͷ΋ؚ·ΕΔͷͰ ͝ར༻͸ܭըతʹ
10. ଞʹ΋͍͍΋ͷ͋ͬͨΒ ڭ͍͑ͯͩ͘͞ʂ
11. androidx.ac*vity androidx.fragment
12. ComponentActivity.viewModels{} Fragment.viewModels{} Fragment.activityViewModels{}
13. ViewModelΛऔಘͰ͖Δ Delegated property
14. viewModels ͸Ҿ਺Ͱ ViewModelStoreOwnerΛ୳͢ blockΛ౉ͤΔ
15. valʹͰ͖Δ
16. Goodbye! private lateinit var
17. @ContentView
18. ComponentAc*vity ͱ Fragmentʹ secondory constructor͕௥Ճ
19. constructorͷҾ਺ʹLayoutͷIDΛ ౉ͤΔ
20. Goodbye setContentView()
21. DataBinding͸bind͢Ε͹Αͦ͞͏
22. androidx.lifecycle
23. ViewModelͱ͔LiveDataͱ͔ೖͬͯ ΔΞϨ
24. ViewModel.viewModelScope
25. ViewModelͷCorou,neScope
26. Context͸ Dispatchers.Main + Job
27. onCleared() ͰΩϟϯηϧ
28. Saved State
29. ViewModel͸ը໘ճసΛੜ͖࢒Δ
30. Ac#vity͕ϝϞϦʔ͔Β ഁغ͞ΕΔ࣌͸ࢮ͵
31. SavedStateHandler Ͱঢ়ଶΛ෮ݩͰ͖Δ
32. γϯϓϧͳ set/get/remove/contains
33. getLiveData()
34. see. h&ps:/ /developer.android.com/ topic/libraries/architecture/ viewmodel-savedstate
35. androidx.navigation
36. Naviga&onͷΞϨ
37. androidx.navigation.safeargs androidx.navigation.safeargs.kotlin
38. Naviga&onͷxmlʹఆٛͨ͠ભҠઌ ͷargsΛࣗಈੜ੒
39. Kotlinίʔυੜ੒Մೳ
40. Goodbye createIntent() methods!
41. Naviga&onͰը໘ભҠ͠ͳͯ͘΋࢖ ͑Δ
42. ·ͣ͸࢖ͬͯΈͯʂ
43. Fragment.navGraphViewModels()
44. ࢦఆͨ͠Naviga&onͷgraphͰੜ͖ ࢒ΔFragment
45. NavHostFragment಺ͷFragment಺ Ͱ࢖͏ɺΈ͍ͨͳײ͡ͷ࣌ʹ࢖͑ͦ ͏
46. ͜Εॻ͍ͯͯࠓ࣮૷ͯ͠Δը໘Ͱ࢖ ͑ͦ͏ͱࢥͬͨͷͰ࢖͏༧ఆ
47. h"ps:/ /developer.android.com/ jetpack/androidx