Dependency Injection  in Kotlin

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%*XJUI%BHHFS compile "com.google.dagger:dagger:2.11" compile "com.google.dagger:dagger-android:2.11" compile "com.google.dagger:dagger-android-support:2.11" kapt "com.google.dagger:dagger-compiler:2.11" kapt
"com.google.dagger:dagger-android-processor:2.11" build.gradle ˖ VTF%BHHFSW ˖ Wד鷄⸇ׁ׸׋䭁䓸ٌآُ٦ٕ׾ⵃ欽

.PEVMFJO%BHHFS @Module class AppModule(private val app: Application) { @Provides @PerApp
fun providesApp() = app } AppModule.kt ˖ !.PEVMF׾➰♷ ˖ *OKFDUׅ׷ًاحسח!1SPWJEFT׾➰♷

.PEVMFJO%BHHFS @Module abstract class ActivityBinderModule { @PerActivity @ContributesAndroidInjector abstract fun
contributeTopActivityInjector(): TopActivity } ActivityBinderModule.kt ˖ "DUJWJUZפך*OKFDU ˖ !$POUSJCVUFT"OESPJE*OKFDUPS׾ⵃ欽

.PEVMFJO%BHHFS public final class DaggerAppComponent implements AppComponent { private Provider<~~~.TopActivitySubcomponent.Builder>
topActivitySubcomponentBuilderProvider; private void initialize(final Builder builder) { this.topActivitySubcomponentBuilderProvider = new dagger.internal.Factory< ~~~.TopActivitySubcomponent.Builder>() { @Override public ~~~.TopActivitySubcomponent.Builder get() { return new TopActivitySubcomponentBuilder(); } }; //… } DaggerAppComponent.kt

$PNQPOFOUJO%BHHFS @Component( modules = arrayOf( AppModule::class, ActivityBinderModule::class, AndroidSupportInjectionModule::class) ) @PerApp
interface AppComponent : AndroidInjector<MainApp> { //… } AppComponent.kt ˖ !$PNQPOFOU׾➰♷

$PNQPOFOUJO%BHHFS //… @PerApp interface AppComponent : AndroidInjector<MainApp> { @Component.Builder abstract
class Builder :ɹ  ɹɹɹɹɹɹɹAndroidInjector.Builder<MainApp>() { abstract fun appModule(module: AppModule): Builder } } AppComponent.kt ˖ !$PNQPOFOU#VJMEFS׾㹋鄲

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"QQMJDBUJPOJO%BHHFS class MainApp : DaggerApplication() { //… override fun applicationInjector()
: AndroidInjector<out DaggerApplication> { return DaggerAppComponent.builder() .appModule(AppModule(app)) .create(app) } } MainApp.kt ˖ BQQMJDBUJPO*OKFDUPS ׾0WFSSJEF

"DUJWJUZJO%BHHFS class TopActivity : DaggerAppCompatActivity() { @Inject lateinit var app:
Application override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) } //… } TopActivity.kt ˖ %BHHFS"QQ$PNQBU"DUJWJUZ׾竰䪫 ˖ "OESPJE*OKFDUJPOJOKFDU UIJT

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,PUMJO5FDIOJRVF JO,PEFJO

SFJFE // not use reified fun getName(clazz: Class<*>): String =
clazz.simpleName    val name = getName(Activity::class.java) // use reified inline fun <reified T> getNameWithReified(): String = T::class.java.simpleName val name = getNameWithReified<Activity>()

JOMJOF inline fun inlineFun(fun: () -> Unit) { fun() fun()
fun() }  inlineFun { print("hoge") }

JOY public infix fun <A, B> A.to(that: B): Pair<A, B>
= Pair(this, that) val pair1 = 1 to 2 // Pair(1, 2) val pair2 = 1.to(2)

%*XJUI,PEFJO compile "com.github.salomonbrys.kodein:kodein:4.0.0" compile "com.github.salomonbrys.kodein:kodein-android:4.0.0" build.gradle

.PEVMFJO,PEFJO fun appModule(app: Application) = Kodein.Module { bind<Application>() with instance(app)
} AppModule.kt ˖ !.PEVMF,PEFJO.PEVMF ˖ !1SPWJEFCJOESFJFE5LPUMJO"OZ JOpY SFJpFE CJOE$MBTT QSPWJEF*OTUBODF

"QQMJDBUJPOJO,PEFJO class KodeinApp : Application(), KodeinAware { override val kodein:
Kodein by Kodein.lazy { import(appModule(this@KodeinApp)) } } KodeinApp.kt ˖ ,PEFJO"XBSF׾㹋鄲

"DUJWJUZJO,PEFJO class TopActivity : KodeinAppCompatActivity() { private val app: Application
by instance() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) } //… } TopActivity.kt ˖ ,PEFJO"QQ$PNQBU"DUJWJUZ׾竰䪫

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5BHHFECJOEJOHT val kodein = Kodein { bind<Dice>() with factory {
sides: Int -> RandomDice(sides) } bind<Dice>("DnD10") with provider { RandomDice(10) } bind<Dice>("DnD20") with singleton { RandomDice(20) } }

4DPQFETJOHMFUPOT val kodein = Kodein { bind<Logger>() with scopedSingleton(contextScope) {
LogManager.getNamedLogger(it.localClassName) } } val logger: Logger = kodein.with(context).instance() // Same object as logger val sameLogger: Logger = kodein.with(context).instance() // different object than logger val otherLogger: Logger = kodein.with(otherContext).instance()

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:VLJ4IJIP !TIJIPDIBO 5IBOLZPV DBLUJO

Dependency Injection in Kotlin

Dependency Injection in Kotlin

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Dependency Injection  in Kotlin

Dependency Injection  in Kotlin