さくっとDaggerをHiltに対応する

GradlePluginを追加

build.gradle

buildscript {
    ext.hilt_version = '2.28-alpha'
    repositories {
        ...
        google()
    }
    dependencies {
        ...
        classpath "com.google.dagger:hilt-android-gradle-plugin:$hilt_version"
    }
}

Dependencyを追加

app/build.gradle

...
apply plugin: 'dagger.hilt.android.plugin'

android {
  ...
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }
}

dependencies {
    ...
     kapt "com.google.dagger:dagger-compiler:$versions.dagger2"
     implementation "com.google.dagger:hilt-android:$hilt_version"
     kapt "com.google.dagger:hilt-android-compiler:$hilt_version"
}

Annotationを追加

App.kt

@HiltAndroidApp
class App : MultiDexApplication() {
    ...
}

AppComponent.kt

@Singleton
@Component(modules = [AppModule::class])
interface AppComponent {
    @Component.Factory
    interface Factory {
        fun create(@BindsInstance context: Context): AppComponent
    }
}

AppModule.kt

@Module
@InstallIn(ApplicationComponent::class)
open class AppModule {
    ...
}

MainActivity.kt

@AndroidEntryPoint
public class MainActivity: AppCompatActivity() {
    ...
}

MainModel.kt

@Singleton
class MainModel @Inject constructor(
    @ApplicationContext context: Context
) {
    ...
}