plugins {
    id("com.google.dagger.hilt.android") version "2.48" apply false
}
dependencies {
    implementation("com.google.dagger:hilt-android:2.48")
    kapt("com.google.dagger:hilt-compiler:2.48") // Kotlin 注解處理器
}

plugins {
    id("com.google.dagger.hilt.android") version "2.48" apply false
}

@HiltAndroidApp
class MyApp : Application()

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    @Inject lateinit var myDependency: MyDependency // 依賴(lài)注入
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        myDependency.doSomething() // 直接使用
    }
}

@Module
@InstallIn(SingletonComponent::class) // 作用域?yàn)槿謫卫?
object AppModule {
    @Provides
    fun provideMyDependency(): MyDependency = MyDependencyImpl()
}

@Module
@InstallIn(ViewModelComponent::class) // 作用域?yàn)?ViewModel
object ViewModelModule {
    @ViewModelScoped
    @Provides
    fun provideMyViewModelDependency(): MyViewModelDependency = MyViewModelDependencyImpl()
}

@HiltViewModel
class MyViewModel @Inject constructor(
    private val myDependency: MyDependency
) : ViewModel() {
    fun doWork() {
        myDependency.doSomething()
    }
}

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    private val viewModel: MyViewModel by viewModels()
}

interface MyRepository {
    fun getData(): String
}
class MyRepositoryImpl @Inject constructor() : MyRepository {
    override fun getData() = "Data from Repository"
}
@Module
@InstallIn(SingletonComponent::class)
abstract class RepositoryModule {
    @Binds
    abstract fun bindMyRepository(impl: MyRepositoryImpl): MyRepository
}

@Module
@InstallIn(SingletonComponent::class)
object NetworkModule {
    @Provides
    fun provideRetrofit(): Retrofit {
        return Retrofit.Builder()
            .baseUrl("https://api.example.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .build()
    }
    @Provides
    fun provideApiService(retrofit: Retrofit): ApiService {
        return retrofit.create(ApiService::class.java)
    }
}

@Inject lateinit var heavyDependency: Lazy<HeavyDependency>
fun useDependency() {
    heavyDependency.get().doWork() // 使用時(shí)才初始化
}