原理から完全理解するDagger Hilt Migration

DroidKaigi 2021の発表資料です

Transcript

1. 原理から完全理解する
   Dagger Hilt Migration
   Keita Kagurazaka
   

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2. 本発表について
   ● 話すこと
   ○ 素のDaggerとdagger.android、Hiltの違い
   ○ Hiltへの移行方法
   ○ 移行する際によく当たる問題とその解決方法
   ● 話さないこと / 前提とする知識
   ○ DIとは何か、その必要性
   ○ Daggerの使い方、どんなクラスがあるかなど
   

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3. Agenda
   Daggerの捉え方
   dagger.androidとHiltの思想
   Hiltに段階的に移行する
   FAQ
   01
   02
   03
   04
   

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4. コンセプト
   ● 「段階的」なHilt移行
   ○ 日々のプロジェクトと並行して進められるように
   ● 原理から理解する
   ○ 実際に移行する際に自ら壁を乗り越えられるように
   

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5. Daggerの捉え方
   dagger.androidとHiltの思想
   Hiltに段階的に移行する
   FAQ
   Agenda
   01
   02
   03
   04
   

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6. Dagger = Component Tree
   

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7. Dagger = Component Tree
   

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8. Componentの提供サービス
   1. 依存性(インスタンス)の受け渡し
   2. 依存性(インスタンス)の同一性保証
   

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9. Componentの提供サービス
   1. 依存性(インスタンス)の受け渡し
   2. 依存性(インスタンス)の同一性保証
   = 何回受け渡しても同じインスタンス
   

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10. @Component(modules = [RepositoryModule::class])
    interface ApplicationComponent {
    fun getUserRepository(): UserRepository
    fun inject(app: App)
    }
    Componentによる依存性の受け渡し
    

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11. @Component(modules = [RepositoryModule::class])
    interface ApplicationComponent {
    fun getUserRepository(): UserRepository
    fun inject(app: App)
    }
    Componentによる依存性の受け渡し
    

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12. @Component(modules = [RepositoryModule::class])
    interface ApplicationComponent {
    fun getUserRepository(): UserRepository
    fun inject(app: App)
    }
    Componentによる依存性の受け渡し
    

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13. @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent { /* 省略 */ }
    @Module
    class ApplicationModule {
    @Singleton
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    Componentによる同一性保証
    

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14. @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent { /* 省略 */ }
    @Module
    class ApplicationModule {
    @Singleton
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    Componentによる同一性保証
    

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15. @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent { /* 省略 */ }
    @Module
    class ApplicationModule {
    @Singleton
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    Componentによる同一性保証
    

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16. 倉庫預かりオプション
    ThirdPartyLibrary
    ください
    ThirdParty
    Library
    倉庫
    ApplicationComponent
    以前と同じ
    ブツです
    

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17. @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent { /* 省略 */ }
    @Module
    class ApplicationModule {
    @Singleton
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    Componentによる同一性保証
    

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18. @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent { /* 省略 */ }
    @Module
    class ApplicationModule {
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    Componentによる同一性保証
    毎回作り直し！
    

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19. Component =
    工場
    倉庫
    受け渡し窓口
    

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20. Dagger = Component Tree
    

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21. インスタンスのライフタイム管理
    アプリのプロセス終了まで
    残ってるよ！
    ThirdParty
    Library
    ApplicationComponentが
    消えるまで残ってるよ！
    倉庫
    ApplicationComponent
    

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22. インスタンスのライフタイム管理
    LoginActivityComponent
    ApplicationComponent
    アプリのプロセス終了まで
    残ってるよ！
    LoginActivityが
    消えるまで残ってるよ！
    

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23. インスタンスのライフタイム管理
    LoginActivityComponent
    ApplicationComponent
    先輩のインスタンスも
    こちらで受け渡します！
    

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24. インスタンスのライフタイム管理
    LoginActivityComponent
    ApplicationComponent
    苦しゅうない
    先輩のインスタンスも
    こちらで受け渡します！
    

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25. インスタンスのライフタイム管理
    LoginActivityComponent
    ApplicationComponent
    Component Tree
    

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26. @Scope
    @Retention(AnnotationRetention.RUNTIME)
    annotation class ActivityScope
    @ActivityScope
    @Subcomponent
    interface LoginActivityComponent {
    fun inject(activity: LoginActivity)
    @Subcomponent.Factory
    interface Factory {
    fun create(): LoginActivityComponent
    }
    }
    SubcomponentによるTree定義
    

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27. @Scope
    @Retention(AnnotationRetention.RUNTIME)
    annotation class ActivityScope
    @ActivityScope
    @Subcomponent
    interface LoginActivityComponent {
    fun inject(activity: LoginActivity)
    @Subcomponent.Factory
    interface Factory {
    fun create(): LoginActivityComponent
    }
    }
    SubcomponentによるTree定義
    

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28. @Module(subcomponents = [LoginActivityComponent::class])
    interface ActivityModule
    @Singleton
    @Component(modules = [
    ApplicationModule::class,
    ActivityModule::class
    ])
    interface ApplicationComponent
    SubcomponentによるTree定義
    

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29. @Module(subcomponents = [LoginActivityComponent::class])
    interface ActivityModule
    @Singleton
    @Component(modules = [
    ApplicationModule::class,
    ActivityModule::class
    ])
    interface ApplicationComponent
    SubcomponentによるTree定義
    

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30. @Module(subcomponents = [LoginActivityComponent::class])
    interface ActivityModule
    @Singleton
    @Component(modules = [
    ApplicationModule::class,
    ActivityModule::class
    ])
    interface ApplicationComponent
    SubcomponentによるTree定義
    

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31. Component Tree
    ApplicationComponent
    ActivityModule
    LoginActivityComponent
    ApplicationModule
    

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32. Component Tree
    ApplicationComponent
    ApplicationModule
    LoginActivityComponent
    

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33. Component Tree
    ApplicationC
    ApplicationM
    LoginActivityC
    

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34. Daggerの捉え方
    dagger.androidとHiltの思想
    Hiltに段階的に移行する
    FAQ
    Agenda
    01
    02
    03
    04
    

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35. interface ApplicationComponent {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    }
    class LoginActivity : AppCompatActivity() {
    lateinit var component: LoginActivityComponent
    override fun onCreate(savedInstanceState: Bundle?) {
    component = (applicationContext as App).component
    .loginActivityComponent().create()
    component.inject(this)
    super.onCreate(savedInstanceState)
    }
    }
    Boilerplate問題
    

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36. interface ApplicationComponent {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    }
    class LoginActivity : AppCompatActivity() {
    lateinit var component: LoginActivityComponent
    override fun onCreate(savedInstanceState: Bundle?) {
    component = (applicationContext as App).component
    .loginActivityComponent().create()
    component.inject(this)
    super.onCreate(savedInstanceState)
    }
    }
    Boilerplate問題
    

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37. dagger.android
    

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38. dagger.android
    書くのが大変なら
    コード生成すればいいじゃない
    

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39. @Module
    interface MainActivityModule {
    @ActivityScope
    @ContributesAndroidInjector
    fun contributesMainActivity(): MainActivity
    }
    @Module(
    includes = [MainActivityModule::class],
    subcomponents = [LoginActivityComponent::class]
    )
    interface ActivityModule
    dagger.androidの解法 - コード生成
    

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40. @Module
    interface MainActivityModule {
    @ActivityScope
    @ContributesAndroidInjector
    fun contributesMainActivity(): MainActivity
    }
    @Module(
    includes = [MainActivityModule::class],
    subcomponents = [LoginActivityComponent::class]
    )
    interface ActivityModule
    dagger.androidの解法 - コード生成
    

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41. @Module
    interface MainActivityModule {
    @ActivityScope
    @ContributesAndroidInjector
    fun contributesMainActivity(): MainActivity
    }
    @Module(
    includes = [MainActivityModule::class],
    subcomponents = [LoginActivityComponent::class]
    )
    interface ActivityModule
    dagger.androidの解法 - コード生成
    MainActivitySubC
    

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42. @Module
    interface MainActivityModule {
    @ActivityScope
    @ContributesAndroidInjector
    fun contributesMainActivity(): MainActivity
    }
    @Module(
    includes = [MainActivityModule::class],
    subcomponents = [LoginActivityComponent::class]
    )
    interface ActivityModule
    dagger.androidの解法 - コード生成
    

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43. @Module
    interface MainActivityModule {
    @ActivityScope
    @ContributesAndroidInjector
    fun contributesMainActivity(): MainActivity
    }
    @Module(
    includes = [MainActivityModule::class],
    subcomponents = [LoginActivityComponent::class]
    )
    interface ActivityModule
    dagger.androidの解法 - コード生成
    MainActivitySubC
    

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44. @Module
    interface MainActivityModule {
    @ActivityScope
    @ContributesAndroidInjector
    fun contributesMainActivity(): MainActivity
    }
    @Module(
    includes = [MainActivityModule::class],
    subcomponents = [LoginActivityComponent::class]
    )
    interface ActivityModule
    dagger.androidの解法 - コード生成
    ApplicationC
    MainActivitySubC
    

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45. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    

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46. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    

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47. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    

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48. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    

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49. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    MainActivity
    

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50. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    MainActivitySubC
    MainActivity
    

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51. @Module(subcomponents =
    MainActivityModule_ContributesMainActivity.MainActivitySubcomponent.class)
    public abstract class MainActivityModule_ContributesMainActivity {
    private MainActivityModule_ContributesMainActivity() {}
    @Binds
    @IntoMap
    @ClassKey(MainActivity.class)
    abstract AndroidInjector.Factory> bindAndroidInjectorFactory(
    MainActivitySubcomponent.Factory builder);
    @Subcomponent
    @ActivityScope
    public interface MainActivitySubcomponent extends AndroidInjector {
    @Subcomponent.Factory
    interface Factory extends AndroidInjector.Factory {}
    }
    }
    MainActivitySubC
    MainActivity
    

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52. dagger.androidのinjection
    

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53. dagger.androidのinjection
    1. AndroidInjection.inject
    

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54. dagger.androidのinjection
    1. AndroidInjection.inject
    DispatchingAndroidInjector
    

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55. dagger.androidのinjection
    1. AndroidInjection.inject
    DispatchingAndroidInjector
    ︙
    MainActivitySubC
    MainActivity
    MainFragmentSubC
    MainFragment
    LoginActivitySubC
    LoginActivity
    

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56. dagger.androidのinjection
    1. AndroidInjection.inject
    2. 渡されたインスタンスのクラスを
    keyにSubCを見つける
    DispatchingAndroidInjector
    ︙
    MainActivitySubC
    MainActivity
    MainFragmentSubC
    MainFragment
    LoginActivitySubC
    LoginActivity
    

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57. dagger.androidのinjection
    1. AndroidInjection.inject
    2. 渡されたインスタンスのクラスを
    keyにSubCを見つける
    3. SubCをインスタンス化して
    injection
    DispatchingAndroidInjector
    ︙
    MainActivitySubC
    MainActivity
    MainFragmentSubC
    MainFragment
    LoginActivitySubC
    LoginActivity
    

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58. class App : Application(), HasAndroidInjector {
    @Inject
    lateinit var androidInjector: DispatchingAndroidInjector
    override fun androidInjector(): AndroidInjector =
    androidInjector
    }
    dagger.androidのinjection
    

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59. dagger.androidのComponent Tree
    ApplicationC
    MainActivitySubC
    MainFragmentSubC HogeFragmentSubC
    HugaActivitySubC
    HugaFragmentSubC PiyoFragmentSubC
    

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60. Hilt
    

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61. Hilt
    Componentは
    こっちで用意するから
    それ使ってね
    

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62. https://dagger.dev/hilt/components より引用
    Hiltの解法 - プリセットComponent
    

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63. HiltのComponent Tree (simple ver.)
    SingletonC ActivityC FragmentC
    

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64. @InstallIn(SingletonComponent::class)
    @Module
    class ApplicationModule {
    @Singleton
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    プリセットComponentの使い方
    

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65. @InstallIn(SingletonComponent::class)
    @Module
    class ApplicationModule {
    @Singleton
    @Provides
    fun providesThirdPartyLibrary(): ThirdPartyLibrary =
    ThirdPartyLibrary.Builder.build()
    }
    プリセットComponentの使い方
    

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66. @InstallIn(SingletonComponent::class)
    @Module
    class ApplicationModule
    @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent
    プリセットComponentの使い方
    

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67. @Component(modules = [AllApplicationModule::class])
    interface ApplicationComponent {
    fun inject(instance: NeedInjectionClass)
    fun getUserRepository(): UserRepository
    }
    インスタンス受け渡し窓口閉鎖のご連絡
    

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68. @InstallIn(SingletonComponent::class)
    @EntryPoint
    interface ApplicationEntryPoint {
    fun inject(instance: NeedInjectionClass)
    fun getUserRepository(): UserRepository
    }
    EntryPoint
    

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69. @InstallIn(SingletonComponent::class)
    @EntryPoint
    interface ApplicationEntryPoint {
    fun inject(instance: NeedInjectionClass)
    fun getUserRepository(): UserRepository
    }
    public abstract static class SingletonC implements SingletonComponent,
    ApplicationEntryPoint {
    /* 省略 */
    }
    EntryPoint = Componentの1窓口
    

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70. interface RepositoryProvider {
    fun getUserRepository(): UserRepository
    }
    interface ApplicationInjector {
    fun inject(instance: NeedInjectionClass)
    }
    @Singleton
    @Component(modules = [ApplicationModule::class])
    interface ApplicationComponent : RepositoryProvider, ApplicationInjector
    EntryPoint ≈ Componentの分割定義
    

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71. class MainActivity : AppCompatActivity()
    class MainFragment : Fragment()
    HiltのInjection
    

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72. @AndroidEntryPoint
    class MainActivity : AppCompatActivity()
    @AndroidEntryPoint
    class MainFragment : Fragment()
    HiltのInjection
    

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73. public abstract class Hilt_MainActivity extends AppCompatActivity
    implements GeneratedComponentManagerHolder {
    Hilt_MainActivity() {
    super();
    _initHiltInternal();
    }
    private void _initHiltInternal() {
    addOnContextAvailableListener(new OnContextAvailableListener() {
    @Override
    public void onContextAvailable(Context context) {
    inject();
    }
    });
    }
    }
    

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74. public abstract class Hilt_MainActivity extends AppCompatActivity
    implements GeneratedComponentManagerHolder {
    Hilt_MainActivity() {
    super();
    _initHiltInternal();
    }
    private void _initHiltInternal() {
    addOnContextAvailableListener(new OnContextAvailableListener() {
    @Override
    public void onContextAvailable(Context context) {
    inject();
    }
    });
    }
    }
    

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75. public abstract class Hilt_MainActivity extends AppCompatActivity
    implements GeneratedComponentManagerHolder {
    Hilt_MainActivity() {
    super();
    _initHiltInternal();
    }
    private void _initHiltInternal() {
    addOnContextAvailableListener(new OnContextAvailableListener() {
    @Override
    public void onContextAvailable(Context context) {
    inject();
    }
    });
    }
    }
    ボイラープレート
    全部ここでやります
    

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76. public abstract class Hilt_MainActivity extends AppCompatActivity
    implements GeneratedComponentManagerHolder {
    Hilt_MainActivity() {
    super();
    _initHiltInternal();
    }
    private void _initHiltInternal() {
    addOnContextAvailableListener(new OnContextAvailableListener() {
    @Override
    public void onContextAvailable(Context context) {
    inject();
    }
    });
    }
    }
    

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77. @AndroidEntryPoint
    class MainActivity : AppCompatActivity()
    Bytecode transformation
    in .kt
    

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78. @AndroidEntryPoint
    class MainActivity : AppCompatActivity()
    Bytecode transformation
    in .kt
    

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79. @AndroidEntryPoint
    class MainActivity : Hilt_MainActivity()
    Bytecode transformation
    in .dex
    

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80. @AndroidEntryPoint
    class MainActivity : AppCompatActivity()
    @AndroidEntryPoint
    class MainFragment : Fragment()
    HiltのInjection
    

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81. Daggerの捉え方
    dagger.androidとHiltの思想
    Hiltに段階的に移行する
    FAQ
    Agenda
    01
    02
    03
    04
    

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82. サンプルプロジェクト
    ● https://github.com/k-kagurazaka/hilt-migration
    ● main branch
    ○ raw Dagger + dagger.androidの構成
    ● hilt-migration branch
    ○ Hilt化済み
    ○ 各commitはbuild pass
    

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83. サンプルプロジェクトのComponent Tree
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    EmailSignupActivityC UserRegistrationFragmentC
    SnsSignupActivityC UserRegistrationFragmentC
    

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84. raw Dagger
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    EmailSignupActivityC UserRegistrationFragmentC
    SnsSignupActivityC UserRegistrationFragmentC
    

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85. dagger.android
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    EmailSignupActivityC UserRegistrationFragmentC
    SnsSignupActivityC UserRegistrationFragmentC
    

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86. 同一Fragment、別Component
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    EmailSignupActivityC UserRegistrationFragmentC
    SnsSignupActivityC UserRegistrationFragmentC
    

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87. 移行スタート
    

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88. 移行ステップ
    1. gradleの設定
    2. Component Treeの接ぎ木
    3. Scopeアノテーションの置き換え
    4. MainActivityの移行
    5. Loginの移行
    6. MainFragmentの移行
    7. Activityのお掃除
    8. dagger.androidの除去
    9. ApplicationComponentの削除
    

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89. 移行ステップ
    1. gradleの設定
    2. Component Treeの接ぎ木
    3. Scopeアノテーションの置き換え
    4. MainActivityの移行
    5. Loginの移行
    6. MainFragmentの移行
    7. Activityのお掃除
    8. dagger.androidの除去
    9. ApplicationComponentの削除
    

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90. SKIP
    

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91. 移行ステップ
    1. gradleの設定
    2. Component Treeの接ぎ木
    3. Scopeアノテーションの置き換え
    4. MainActivityの移行
    5. Loginの移行
    6. MainFragmentの移行
    7. Activityのお掃除
    8. dagger.androidの除去
    9. ApplicationComponentの削除
    

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92. Component Treeの接ぎ木
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    SingletonC ActivityC FragmentC
    ApplicationM
    RepositoryM
    

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93. Component Treeの接ぎ木
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    SingletonC ActivityC FragmentC
    ApplicationM
    RepositoryM
    

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94. @Singleton
    @Component(modules = [
    AndroidInjectionModule::class,
    ApplicationModule::class,
    RepositoryModule::class,
    ActivityModule::class,])
    interface ApplicationComponent : AndroidInjector {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    @Component.Factory
    interface Factory {
    fun create(@BindsInstance app: App): ApplicationComponent
    }
    }
    Component Treeの接ぎ木
    

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95. @Singleton
    @Component(modules = [
    AndroidInjectionModule::class,
    ApplicationModule::class,
    RepositoryModule::class,
    ActivityModule::class,])
    interface ApplicationComponent : AndroidInjector {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    @Component.Factory
    interface Factory {
    fun create(@BindsInstance app: App): ApplicationComponent
    }
    }
    Component Treeの接ぎ木
    

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96. @Singleton
    @Component(modules = [
    AndroidInjectionModule::class,
    ApplicationModule::class,
    RepositoryModule::class,
    ActivityModule::class,])
    interface ApplicationComponent : AndroidInjector {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    }
    Component Treeの接ぎ木
    

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97. @Singleton
    @Component(modules = [
    AndroidInjectionModule::class,
    ApplicationModule::class,
    RepositoryModule::class,
    ActivityModule::class,])
    @InstallIn(SingletonComponent::class)
    @EntryPoint
    interface ApplicationComponent : AndroidInjector {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    }
    Component Treeの接ぎ木
    

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98. @Singleton
    @Component(modules = [
    AndroidInjectionModule::class,
    ApplicationModule::class,
    RepositoryModule::class,
    ActivityModule::class,])
    @InstallIn(SingletonComponent::class)
    @EntryPoint
    interface ApplicationComponent : AndroidInjector {
    fun loginActivityComponent(): LoginActivityComponent.Factory
    }
    Component Treeの接ぎ木
    

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99. SingletonCImpl
    Component Treeの接ぎ木
    ApplicationC
    MainActivityC MainFragmentC
    LoginActivityC LoginFragmentC
    SingletonC ActivityC FragmentC
    ApplicationM
    RepositoryM
    

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100. SingletonCImpl
     Component Treeの接ぎ木
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     ApplicationM
     RepositoryM
     

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101. @Singleton
     @Component(modules = [
     AndroidInjectionModule::class,
     ApplicationModule::class,
     RepositoryModule::class,
     ActivityModule::class,])
     @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent : AndroidInjector {
     fun loginActivityComponent(): LoginActivityComponent.Factory
     }
     Component Treeの接ぎ木
     

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102. @InstallIn(SingletonComponent::class)
     @Module(includes = [
     AndroidInjectionModule::class,
     ApplicationModule::class,
     RepositoryModule::class,
     ActivityModule::class,])
     interface AggregatorModule
     @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent : AndroidInjector {
     fun loginActivityComponent(): LoginActivityComponent.Factory
     }
     Component Treeの接ぎ木
     

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103. SingletonCImpl
     Component Treeの接ぎ木
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     ApplicationM
     RepositoryM
     

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104. class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent =
     DaggerApplicationComponent.factory().create(this)
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     

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105. class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent =
     DaggerApplicationComponent.factory().create(this)
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     

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106. class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     

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107. class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     

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108. @HiltAndroidApp
     class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     

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109. @HiltAndroidApp
     class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     

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110. @HiltAndroidApp
     class App : Application(), HasAndroidInjector {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     }
     Applicationの変更
     
     

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111. SingletonCImpl
     現時点のComponent Tree
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     ApplicationM
     RepositoryM
     

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112. 現時点のComponent Tree
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     ApplicationM
     RepositoryM
     

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113. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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114. @Module
     interface MainActivityModule {
     @ActivityScope
     @ContributesAndroidInjector(modules = [MainFragmentModule::class])
     fun contributesMainActivity(): MainActivity
     }
     @Module
     interface MainFragmentModule {
     @FragmentScope
     @ContributesAndroidInjector
     fun contributesMainFragment(): MainFragment
     }
     Scopeアノテーションの置き換え
     

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115. @Module
     interface MainActivityModule {
     @ActivityScope
     @ContributesAndroidInjector(modules = [MainFragmentModule::class])
     fun contributesMainActivity(): MainActivity
     }
     @Module
     interface MainFragmentModule {
     @FragmentScope
     @ContributesAndroidInjector
     fun contributesMainFragment(): MainFragment
     }
     Scopeアノテーションの置き換え
     

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116. import dagger.hilt.android.scopes.ActivityScoped
     import dagger.hilt.android.scopes.FragmentScoped
     @Module
     interface MainActivityModule {
     @ActivityScoped
     @ContributesAndroidInjector(modules = [MainFragmentModule::class])
     fun contributesMainActivity(): MainActivity
     }
     @Module
     interface MainFragmentModule {
     @FragmentScoped
     @ContributesAndroidInjector
     fun contributesMainFragment(): MainFragment
     }
     Scopeアノテーションの置き換え
     

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117. import dagger.hilt.android.scopes.ActivityScoped
     import dagger.hilt.android.scopes.FragmentScoped
     @Module
     interface MainActivityModule {
     @ActivityScoped
     @ContributesAndroidInjector(modules = [MainFragmentModule::class])
     fun contributesMainActivity(): MainActivity
     }
     @Module
     interface MainFragmentModule {
     @FragmentScoped
     @ContributesAndroidInjector
     fun contributesMainFragment(): MainFragment
     }
     Scopeアノテーションの置き換え
     
     

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118. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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119. 移行 = 担当Component変更
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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120. 移行 = 担当Component変更
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     MainActivity担当
     

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121. 移行 = 担当Component変更
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     MainActivity担当
     

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122. class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     override fun onCreate(savedInstanceState: Bundle?) {
     AndroidInjection.inject(this)
     super.onCreate(savedInstanceState)
     }
     }
     MainActivityの移行
     

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123. class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     override fun onCreate(savedInstanceState: Bundle?) {
     AndroidInjection.inject(this)
     super.onCreate(savedInstanceState)
     }
     }
     MainActivityの移行
     

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124. class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     }
     }
     MainActivityの移行
     

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125. @AndroidEntryPoint
     class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     }
     }
     MainActivityの移行
     

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126. @AndroidEntryPoint
     class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     }
     }
     MainActivityの移行
     

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127. MainActivityのComponent削除
     ApplicationC
     MainActivityC MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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128. MainActivityのComponent削除
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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129. MainFragmentのComponent接ぎ木
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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130. MainFragmentのComponent接ぎ木
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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131. MainFragmentのComponent接ぎ木
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     MainFragmentModule
     

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132. @InstallIn(ActivityComponent::class)
     @Module(
     includes = [
     MainFragmentModule::class,
     ]
     )
     interface DaggerAndroidActivityModule
     MainFragmentのComponent接ぎ木
     
     

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133. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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134. Loginの移行
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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135. Loginの移行
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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136. Loginの移行
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     LoginActivity担当 LoginFragment担当
     

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137. Loginの移行
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     LoginActivity担当 LoginFragment担当
     

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138. class LoginActivity : AppCompatActivity() {
     lateinit var component: LoginActivityComponent
     override fun onCreate(savedInstanceState: Bundle?) {
     component = (applicationContext as App).component
     .loginActivityComponent().create(this)
     component.inject(this)
     super.onCreate(savedInstanceState)
     }
     }
     LoginActivityの移行
     

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139. class LoginActivity : AppCompatActivity() {
     lateinit var component: LoginActivityComponent
     override fun onCreate(savedInstanceState: Bundle?) {
     component = (applicationContext as App).component
     .loginActivityComponent().create(this)
     component.inject(this)
     super.onCreate(savedInstanceState)
     }
     }
     LoginActivityの移行
     

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140. class LoginActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     }
     }
     LoginActivityの移行
     

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141. @AndroidEntryPoint
     class LoginActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     }
     }
     LoginActivityの移行
     

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142. @AndroidEntryPoint
     class LoginActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     /* 省略 */
     }
     }
     LoginActivityの移行
     

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143. class LoginFragment: Fragment() {
     lateinit var component: LoginFragmentComponent
     override fun onAttach(context: Context) {
     super.onAttach(context)
     component = (requireActivity() as LoginActivity).component
     .loginFragmentComponent().create(this)
     component.inject(this)
     }
     }
     LoginFragmentの移行
     

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144. class LoginFragment: Fragment() {
     lateinit var component: LoginFragmentComponent
     override fun onAttach(context: Context) {
     super.onAttach(context)
     component = (requireActivity() as LoginActivity).component
     .loginFragmentComponent().create(this)
     component.inject(this)
     }
     }
     LoginFragmentの移行
     

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145. class LoginFragment: Fragment() {
     override fun onAttach(context: Context) {
     super.onAttach(context)
     }
     }
     LoginFragmentの移行
     

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146. @AndroidEntryPoint
     class LoginFragment: Fragment() {
     override fun onAttach(context: Context) {
     super.onAttach(context)
     }
     }
     LoginFragmentの移行
     

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147. @AndroidEntryPoint
     class LoginFragment: Fragment() {
     override fun onAttach(context: Context) {
     super.onAttach(context)
     /* 省略 */
     }
     }
     LoginFragmentの移行
     

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148. LoginのComponent削除
     ApplicationC
     MainFragmentC
     LoginActivityC LoginFragmentC
     SingletonC ActivityC FragmentC
     

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149. LoginのComponent削除
     ApplicationC
     MainFragmentC
     SingletonC ActivityC FragmentC
     

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150. LoginのComponent削除
     ApplicationC
     MainFragmentC
     SingletonC ActivityC FragmentC
     
     

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151. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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152. MainFragmentの移行
     ApplicationC
     MainFragmentC
     SingletonC ActivityC FragmentC
     MainFragment担当
     

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153. MainFragmentの移行
     ApplicationC
     MainFragmentC
     SingletonC ActivityC FragmentC
     MainFragment担当
     

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154. class MainFragment : Fragment() {
     override fun onAttach(context: Context) {
     AndroidSupportInjection.inject(this)
     super.onAttach(context)
     /* 省略 */
     }
     }
     MainFragmentの移行
     

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155. class MainFragment : Fragment() {
     override fun onAttach(context: Context) {
     AndroidSupportInjection.inject(this)
     super.onAttach(context)
     /* 省略 */
     }
     }
     MainFragmentの移行
     

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156. class MainFragment : Fragment() {
     override fun onAttach(context: Context) {
     super.onAttach(context)
     /* 省略 */
     }
     }
     MainFragmentの移行
     

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157. @AndroidEntryPoint
     class MainFragment : Fragment() {
     override fun onAttach(context: Context) {
     super.onAttach(context)
     /* 省略 */
     }
     }
     MainFragmentの移行
     

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158. @AndroidEntryPoint
     class MainFragment : Fragment() {
     override fun onAttach(context: Context) {
     super.onAttach(context)
     /* 省略 */
     }
     }
     MainFragmentの移行
     

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159. MainFragmentのComponent削除
     ApplicationC
     MainFragmentC
     SingletonC ActivityC FragmentC
     

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160. MainFragmentのComponent削除
     ApplicationC
     SingletonC ActivityC FragmentC
     
     

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161. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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162. @AndroidEntryPoint
     class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     /* 省略 */
     }
     MainActivityからdagger.androidを除去
     

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163. @AndroidEntryPoint
     class MainActivity : AppCompatActivity(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector = androidInjector
     /* 省略 */
     }
     MainActivityからdagger.androidを除去
     

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164. @AndroidEntryPoint
     class MainActivity : AppCompatActivity() {
     /* 省略 */
     }
     MainActivityからdagger.androidを除去
     
     

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165. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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166. Activity / Fragmentの移行が完了したら
     ApplicationC
     SingletonC ActivityC FragmentC
     

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167. @HiltAndroidApp
     class App : Application(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     }
     Appからdagger.androidを除去
     

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168. @HiltAndroidApp
     class App : Application(), HasAndroidInjector {
     @Inject
     lateinit var androidInjector: DispatchingAndroidInjector
     override fun androidInjector(): AndroidInjector =
     androidInjector
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     }
     Appからdagger.androidを除去
     

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169. @HiltAndroidApp
     class App : Application() {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     }
     Appからdagger.androidを除去
     

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170. @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent : AndroidInjector
     @InstallIn(SingletonComponent::class)
     @Module(
     includes = [
     AndroidInjectionModule::class,
     ApplicationModule::class,
     RepositoryModule::class,
     ]
     )
     interface AggregatorModule
     Component Treeからdagger.androidを除去
     

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171. @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent : AndroidInjector
     @InstallIn(SingletonComponent::class)
     @Module(
     includes = [
     AndroidInjectionModule::class,
     ApplicationModule::class,
     RepositoryModule::class,
     ]
     )
     interface AggregatorModule
     Component Treeからdagger.androidを除去
     

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172. @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent
     @InstallIn(SingletonComponent::class)
     @Module(
     includes = [
     ApplicationModule::class,
     RepositoryModule::class,
     ]
     )
     interface AggregatorModule
     Component Treeからdagger.androidを除去
     
     

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173. 移行ステップ
     1. gradleの設定
     2. Component Treeの接ぎ木
     3. Scopeアノテーションの置き換え
     4. MainActivityの移行
     5. Loginの移行
     6. MainFragmentの移行
     7. Activityのお掃除
     8. dagger.androidの除去
     9. ApplicationComponentの削除
     

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174. ApplicationComponent削除
     ApplicationC
     SingletonC ActivityC FragmentC
     

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175. ApplicationComponent削除
     ApplicationC
     SingletonC ActivityC FragmentC
     

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176. @HiltAndroidApp
     class App : Application() {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     }
     @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent
     ApplicationComponentを削除
     

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177. @HiltAndroidApp
     class App : Application() {
     val component: ApplicationComponent by lazy {
     EntryPoints.get(this, ApplicationComponent::class.java)
     }
     }
     @InstallIn(SingletonComponent::class)
     @EntryPoint
     interface ApplicationComponent
     ApplicationComponentを削除
     

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178. @HiltAndroidApp
     class App : Application() {
     /* 省略 */
     }
     ApplicationComponentを削除
     
     

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179. Well done 👏
     

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180. Daggerの捉え方
     dagger.androidとHiltの思想
     Hiltに段階的に移行する
     FAQ
     Agenda
     01
     02
     03
     04
     

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181. Q. LoginActivityのような具象クラスを扱いたい
     @ActivityScope
     @Subcomponent
     interface LoginActivityComponent {
     @Subcomponent.Factory
     interface Factory {
     fun create(@BindsInstance activity: LoginActivity): LoginActivityComponent
     }
     }
     

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182. Q. LoginActivityのような具象クラスを扱いたい
     A. castしましょう
     @InstallIn(ActivityComponent::class)
     @Module
     class LoginActivityModule {
     @Provides
     fun providesLoginActivity(activity: Activity): LoginActivity? =
     activity as? LoginActivity?
     }
     

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183. Q. LoginActivityのような具象クラスを扱いたい
     A. castしましょう
     @InstallIn(ActivityComponent::class)
     @Module
     class LoginFeatureModule {
     @Provides
     fun providesLoginActivity(activity: Activity): LoginFeature? =
     (activity as? HasLoginFeature?)?.loginFeature
     }
     

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184. Q. ActivityごとにModuleを切り替えたい
     @Module
     interface SignupActivityModule {
     @ActivityScope
     @ContributesAndroidInjector(modules = [EmailModule::class])
     fun contributesEmailSignupActivity(): EmailSignupActivity
     @ActivityScope
     @ContributesAndroidInjector(modules = [SnsModule::class])
     fun contributesSnsSignupActivity(): SnsSignupActivity
     }
     

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185. Q. ActivityごとにModuleを切り替えたい
     @Module
     interface SignupActivityModule {
     @ActivityScope
     @ContributesAndroidInjector(modules = [EmailModule::class])
     fun contributesEmailSignupActivity(): EmailSignupActivity
     @ActivityScope
     @ContributesAndroidInjector(modules = [SnsModule::class])
     fun contributesSnsSignupActivity(): SnsSignupActivity
     }
     

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186. Q. ActivityごとにModuleを切り替えたい
     @Module
     interface EmailModule {
     @Binds
     fun bindsFeature(feature: EmailSignupFeature): SignupFeature
     }
     @Module
     interface SnsModule {
     @Binds
     fun bindsFeature(feature: SnsSignupFeature): SignupFeature
     }
     

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187. Q. ActivityごとにModuleを切り替えたい
     A. 切り替えたいのはModuleではなくインスタンス
     @InstallIn(ActivityComponent::class)
     @Module
     class SignupModule {
     @Provides
     fun providesFeature(activity: Activity): SignupFeature =
     when (activity) {
     is EmailSignupActivity -> EmailSignupFeature()
     is SnsSignupActivity -> SnsSignupFeature()
     else -> error("Invalid Activity")
     }
     }
     

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188. Q. FCMServiceにinjectするとUIテストが落ちるのですが
     @AndroidEntryPoint
     class MyFirebaseMessagingService : FirebaseMessagingService() {
     @Inject
     lateinit var useCase: RegisterToken
     override fun onNewToken(token: String) {
     super.onNewToken(token)
     useCase.execute(token)
     }
     }
     

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189. Q. FCMServiceにinjectするとUIテストが落ちるのですが
     C Tree
     @Before @After
     C Tree
     @Before @After
     C Tree
     @Before @After
     

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190. Q. FCMServiceにinjectするとUIテストが落ちるのですが
     ContentProvider
     初期化
     C Tree
     @Before @After
     C Tree
     @Before @After
     C Tree
     @Before @After
     

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191. Q. FCMServiceにinjectするとUIテストが落ちるのですが
     A. テストでuseCase実行を諦めましょう
     class MyFirebaseMessagingService : FirebaseMessagingService() {
     @EntryPoint
     @InstallIn(SingletonComponent::class)
     interface LocalEntryPoint {
     fun useCase(): RegisterToken
     }
     }
     

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192. Q. FCMServiceにinjectするとUIテストが落ちるのですが
     A. テストでuseCase実行を諦めましょう
     class MyFirebaseMessagingService : FirebaseMessagingService() {
     private val useCase: RegisterToken? by lazy {
     try {
     EntryPointAccessors.fromApplication(
     applicationContext, LocalEntryPoint::class.java
     ).useCase()
     } catch (t: Throwable) {
     null
     }
     }
     }
     

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193. Q. FCMServiceにinjectするとUIテストが落ちるのですが
     A. テストでuseCase実行を諦めましょう
     class MyFirebaseMessagingService : FirebaseMessagingService() {
     override fun onNewToken(token: String) {
     super.onNewToken(token)
     useCase?.execute(token)
     }
     }
     

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194. Q. 今度はApplicationでUIテストが落ちるのですが
     ContentProvider
     初期化
     C Tree
     @Before @After
     C Tree
     @Before @After
     C Tree
     @Before @After
     

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195. Q. 今度はApplicationでUIテストが落ちるのですが
     App#onCreate
     ContentProvider
     初期化
     C Tree
     @Before @After
     C Tree
     @Before @After
     C Tree
     @Before @After
     

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196. Q. 今度はApplicationでUIテストが落ちるのですが
     A. 初期化処理を遅延実行しましょう
     

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197. open class BaseApp : Application() {
     @EntryPoint
     @InstallIn(SingletonComponent::class)
     interface AppEntryPoint {
     fun appDependencies(): AppDependencies
     }
     private val entryPoint: AppEntryPoint by lazy {
     EntryPointAccessors.fromApplication(this, AppEntryPoint::class.java)
     }
     }
     

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198. open class BaseApp : Application() {
     override fun onCreate() {
     super.onCreate()
     initializeOnCreate()
     }
     protected open fun initializeOnCreate() {
     // ここに必要な初期化処理
     }
     }
     

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199. @CustomTestApplication(AndroidTestApp::class)
     interface HiltAndroidTestApp
     class AndroidTestApp : BaseApp() {
     private val isInitialized = AtomicBoolean(false)
     override fun initializeOnCreate() {
     // 初期化はここでは実施しない
     }
     fun initialize() {
     if (isInitialized.compareAndSet(false, true)) {
     super.initializeOnCreate()
     }
     }
     }
     

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200. @CustomTestApplication(AndroidTestApp::class)
     interface HiltAndroidTestApp
     class AndroidTestApp : BaseApp() {
     private val isInitialized = AtomicBoolean(false)
     override fun initializeOnCreate() {
     // 初期化はここでは実施しない
     }
     fun initialize() {
     if (isInitialized.compareAndSet(false, true)) {
     super.initializeOnCreate()
     }
     }
     }
     

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201. @CustomTestApplication(AndroidTestApp::class)
     interface HiltAndroidTestApp
     class AndroidTestApp : BaseApp() {
     private val isInitialized = AtomicBoolean(false)
     override fun initializeOnCreate() {
     // 初期化はここでは実施しない
     }
     fun initialize() {
     if (isInitialized.compareAndSet(false, true)) {
     super.initializeOnCreate()
     }
     }
     }
     

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202. @CustomTestApplication(AndroidTestApp::class)
     interface HiltAndroidTestApp
     class AndroidTestApp : BaseApp() {
     private val isInitialized = AtomicBoolean(false)
     override fun initializeOnCreate() {
     // 初期化はここでは実施しない
     }
     fun initialize() {
     if (isInitialized.compareAndSet(false, true)) {
     super.initializeOnCreate()
     }
     }
     }
     

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203. class AppInitializeAndroidTestRule : TestRule {
     override fun apply(base: Statement, description: Description): Statement =
     object : Statement() {
     override fun evaluate() {
     val app = ApplicationProvider.getApplicationContext()
     app.initialize()
     base.evaluate()
     }
     }
     }
     

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204. class AppInitializeAndroidTestRule : TestRule {
     override fun apply(base: Statement, description: Description): Statement =
     object : Statement() {
     override fun evaluate() {
     val app = ApplicationProvider.getApplicationContext()
     app.initialize()
     base.evaluate()
     }
     }
     }
     

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205. fun androidTestRule(testInstance: Any): TestRule =
     RuleChain.outerRule(HiltAndroidRule(testInstance))
     .around(AppInitializeAndroidTestRule())
     @HiltAndroidTest
     @RunWith(AndroidJUnit4::class)
     class SomeUiTest {
     @get:Rule
     val rule = androidTestRule(this)
     }
     

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206. Q. 〇〇を□□したい！
     

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207. Q. 〇〇を□□したい！
     A. Component Treeを思い浮かべて、原理から考えよう
     

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208. Thanks!
     

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