Kotlin构造函数中的Koin注入

Question

我不能通过Koin从构造函数调用inject。

如果我使用“. by inject()”注入DataRepository类，那么所有这些都能很好地工作。但是我想在类的构造函数中提供inject。

在"repo.addPayment(payment)“行中的CounterPresenter类中有一个崩溃。向下看这一页。

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:503)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
 Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964) 
 Caused by: org.koin.error.NoBeanDefFoundException: No compatible definition found. Check your module definition

这是我的结构：

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Koin DI，我怎样才能改变这个模块才能成功地工作？

val repositoryModule = module {
    single { PrefsManager() }
    single<IRepository> { DataRepository(get() as LocalRepository) }
    single<ILocalRepository> { LocalRepository(get()) }
}

val databaseModule = module {
    single {
        Room.databaseBuilder(androidApplication(), AppDatabase::class.java, Enviroment.DATABASE_NAME).build()
    }
    single { get<AppDatabase>().getCounterDao() }
}

val presentersModule = module {
    factory { CounterPresenter() }
    factory { SplashPresenter() }
}

类DataRepository

class DataRepository(private val localRepository: ILocalRepository) : IRepository {

    init {  Log.d("ROMAN", "init DataRepository") }

    override suspend fun addPayment(payment: Int) {
        localRepository.addPayment(payment)
    }
}

类LocalRepository

class LocalRepository(private val counterDao: CounterDao) : ILocalRepository {

    override suspend fun addPayment(payment: Int) = runBlocking {
        counterDao.insertPayment(Payment(payment))
    }
}

类CounterPresenter

class CounterPresenter : BasePresenter<CounterContract.View>(), CounterContract.Presenter {
    private val repo: DataRepository by inject()


    override fun onViewCreated() {
        super.onViewCreated()
        launchIO { repo.addPayment(payment) }
    }

Answer 1

若要向任何类注入依赖项，该类必须实现KoinComponent接口。(活动和片段除外)

如果这样做，那么您的代码就会正常工作：

class CounterPresenter : BasePresenter<CounterContract.View>(), CounterContract.Presenter, KoinComponent {
    private val repo: DataRepository by inject()


    override fun onViewCreated() {
        super.onViewCreated()
        launchIO { repo.addPayment(payment) }
    }
}