AndroidXに潜む便利なヤツら

Transcript

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