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DAGGER.ANDROID
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HELLO
ABOUT ME
Yuji Koketsu @kettsun0123
▸ Android Developer
▸ CyberAgent, Inc
▸ ݩ AbemaTV >> ৽نϝσΟΞ
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What is dagger.android?
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WHAT IS DAGGER.ANDROID?
DAGGER.ANDROID IS…
▸ Dagger2ͷAndroid֦ுDIϥΠϒϥϦ
▸ v2.10
▸ core͕ϦϦʔε
▸ v2.11
▸ @ContributesAndroidInjectorՃ
▸ DaggerApplicationՃ
▸ v2.12
▸ ࠓ࠷৽൛ʂ
https://github.com/google/dagger/releases
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WHAT IS DAGGER.ANDROID?
class MainActivity : AppCompatActivity() {
lateinit var instance: Hoge
override fun onCreate(state: Bundle?) {
super.onCreate(state)
...
}
...
}
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WHAT IS DAGGER.ANDROID?
class MainActivity : AppCompatActivity() {
@Inject lateinit var instance: Hoge
override fun onCreate(state: Bundle?) {
AndroidInjection.inject(this)
super.onCreate(state)
...
}
...
}
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dagger.androidͰஔ͖͑Δ
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App
MainActivity
AppModule
class Hoge
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dependencies {
// dagger.android
implementation "com.google.dagger:dagger-android:2.12"
implementation "com.google.dagger:dagger-android-support:2.12"
kapt "com.google.dagger:dagger-android-processor:2.12"
}
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AppComponent.kt
@Singleton
@Component(modules = arrayOf(
AppModule::class
))
interface AppComponent {
fun inject(app: App)
fun activityComponent(): ActivityComponent
}
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AppComponent.kt
@Singleton
@Component(modules = arrayOf(
AndroidInjectionModule::class,
AppModule::class
))
interface AppComponent : AndroidInjector {
@Component.Builder
interface Builder {
fun application(application: App): Builder
fun build(): AppComponent
}
override fun inject(app: App)
}
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ActivityComponent.kt
@Subcomponent(modules = arrayOf(
...
))
interface ActivityComponent {
fun inject(activity: MainActivity)
}
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ActivityComponent.kt
@Subcomponent(modules = arrayOf(
...
))
interface ActivityComponent : AndroidInjector {
@Subcomponent.Builder
abstract class Builder : AndroidInjector.Builder()
}
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ActivityModule.kt
@Module(subcomponents = ActivityComponent::class)
internal abstract class ActivityModule {
@Binds
@IntoMap
@ActivityKey(MainActivity::class)
internal abstract
fun bindMainInjector(
builder: ActivityComponent.Builder
): AndroidInjector.Factory
}
SubcomponentΛModuleͰbind͢Δ
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AppComponent.kt
@Singleton
@Component(modules = arrayOf(
AndroidInjectionModule::class,
AppModule::class
))
interface AppComponent : AndroidInjector {
@Component.Builder
interface Builder {
fun application(application: App): Builder
fun build(): AppComponent
}
override fun inject(app: App)
}
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AppComponent.kt
@Singleton
@Component(modules = arrayOf(
AndroidInjectionModule::class,
ActivityModule::class,
AppModule::class
))
interface AppComponent : AndroidInjector {
@Component.Builder
interface Builder {
fun application(application: App): Builder
fun build(): AppComponent
}
override fun inject(app: App)
}
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class App : Application() {
val appComponent : AppComponent by lazy { DaggerAppComponent.builder()
.appModule(AppModule(this))
.build() }
override fun onCreate() {
super.onCreate()
...
}
...
}
App.kt
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App.kt
class App : DaggerApplication() {
override fun applicationInjector() = DaggerAppComponent.builder()
.application(this)
.build()
override fun onCreate() {
super.onCreate()
...
}
...
}
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MainActivity.kt
class MainActivity : AppCompatActivity() {
@Inject lateinit var instance: Hoge
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
application.appComponent.activityComponent.inject(this)
...
}
...
}
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MainActivity.kt
class MainActivity : AppCompatActivity() {
@Inject lateinit var instance: Hoge
override fun onCreate(savedInstanceState: Bundle?) {
AndroidInjection.inject(this)
super.onCreate(savedInstanceState)
...
}
...
}
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MORE SIMPLE
ͬͱγϯϓϧʹॻ͚·͢
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MORE SIMPLE
@ContributesAndroidInjector
Dagger v2.11 ~
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MORE SIMPLE
ActivityComponent.kt
@Subcomponent(modules = ...)
interface ActivityComponent : AndroidInjector {
@Subcomponent.Builder
abstract class Builder : AndroidInjector.Builder()
}
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MORE SIMPLE
ActivityComponent.kt
@Subcomponent(modules = ...)
interface ActivityComponent : AndroidInjector {
@Subcomponent.Builder
abstract class Builder : AndroidInjector.Builder()
}
Component࡞Βͳͯ͘ྑ͍
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MORE SIMPLE
ActivityModule.kt
@Module(subcomponents = ActivityComponent::class)
internal abstract class ActivityModule {
@Binds
@IntoMap
@ActivityKey(MainActivity::class)
internal abstract
fun bindMainInjector(
builder: ActivityComponent.Builder
): AndroidInjector.Factory
}
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MORE SIMPLE
ActivityModule.kt
@Module(subcomponents = ActivityComponent::class)
internal abstract class ActivityModule {
@Binds
@IntoMap
@ActivityKey(MainActivity::class)
internal abstract
fun bindMainInjector(
builder: ActivityComponent.Builder
): AndroidInjector.Factory
}
Subcomponentͷbindॻ͔ͳ͍͍ͯ͘
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MORE SIMPLE
ActivityBuilder.kt
@Module
internal abstract class ActivityBuilder {
@ContributesAndroidInjector(modules = arrayOf(...))
internal abstract
fun contributeMainActivityInjector(): MainActivity
}
͜Ε͚ͩͰSubcomponent͕Ͱ͖Δ
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MORE SIMPLE
@ContributesAndroidInjectorͰγϯϓϧʹ
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FIN
Thanks:)