Definition '[Single:'com.example.handlers.SocketHandler']‘尝试覆盖现有的definition koin android

Question

我有一个SocketHandler接口和另外两个实现此接口的类。我想在几个处理程序中实现这个接口，并通过koin注入它们。

interface SocketHandler {

    fun onReceive(socketResponses: Enums.SocketResponses, callback: (item: String) -> Unit)

}


class ClassAHandlerImpl : SocketHandler, KoinComponent {

    override fun onReceive(
       socketResponses: Enums.SocketResponses, callback: (item: String) -> Unit
    ) {
        ....
    }

}


class ClassBHandlerImpl: SocketHandler, KoinComponent {

    override fun onReceive(
        socketResponses: Enums.SocketResponses, callback: (item: String) -> Unit
    ) {
        ....
   }
}

以及这些类的Koin模块实现

val handlersModule = module {
    single<SocketHandler> {
        return@single ClassAHandlerImpl()
    }

    single<SocketHandler> {
        return@single ClassBHandlerImpl()
    }

...
}

但是，我得到了一个异常

Caused by: org.koin.core.error.DefinitionOverrideException: Definition '[Single:'com.example.handlers.SocketHandler']' try to override existing definition. Please use override option or check for definition '[Single:'com.example.handlers.SocketHandler']'

Answer 1

Koin不知道要检索哪个SocketHandler实例，因为它在模块中定义了两次。

您应该使用命名参数：

val handlersModule = module {
    single<SocketHandler>(named("SocketHandlerA")) {
        return@single ClassAHandlerImpl()
    }

    single<SocketHandler>(named("SocketHandlerB")) {
        return@single ClassBHandlerImpl()
    }

...
}

然后你可以在你的类中注入：

private val socketHandler by inject<SocketHandler>(named("SocketHandlerA"))