Kotlin初心者がGoogle Play Billing Libraryを使ってみた

Kotlin初心者がGoogle Play Billing Libraryを使ってみた

Transcript

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10. sealed class FindUserResult { data class Found(val user: User) : FindUserResult() data class NotFound(val name: String) : FindUserResult() } fun findUserByName(name: String): FindUserResult { .... if (ݟ͔ͭͬͨ) return FindUserResult.Found(user) else return FindUserResult.NotFound(name) } val result = findUserByName("bitz") when (result) { is FindUserResult.Found -> println("find ${result.user}") is FindUserResult.NotFound ->println("find ${result.name}") } ϓϥΠϚϦίϯετϥΫλ ͜ΕܧঝͳΜͰ͢Ͷʂ
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13. IUUQTHJUIVCDPNBOESPJEQMBZCJMMJOHTBNQMFT class MakePurchaseFragment : Fragment() { override fun onViewCreated(view: View, savedInstanceState: Bundle?) { billingViewModel = ViewModelProviders.of(this).get(BillingViewModel::class.java) billingViewModel.purchasesLiveData.observe(this, Observer { it?.let { purchasesAdapter.setPurchases(it) } }) } } 7JFX
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14. class BillingViewModel(application: Application) : AndroidViewModel(application) { val gasTankLiveData: LiveData<GasTank> init { repository = BillingRepository.getInstance(application) repository.startDataSourceConnections() purchasesLiveData = repository.purchasesLiveData } override fun onCleared() { super.onCleared() repository.endDataSourceConnections() viewModelScope.coroutineContext.cancel() } } *O"QQ
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15. class BillingRepository private constructor(private val application: Application) : PurchasesUpdatedListener, BillingClientStateListener { lateinit private var playStoreBillingClient: BillingClient val purchasesLiveData = mutableListOf<MutableList<SkuDetails>>() fun demo() { purchasesLiveData.setValue(ߋ৽͢Δ஋) } } ࣮ࡍͷίʔυͰ͸ɺઌ΄Ͳͷ3FTVMUܕͰ੒ޭ ͳΒσʔλΛࣦഊͳΒΤϥʔ৘ใΛฦ͢Α͏ ʹͨ͠ɻ