创建实现 2 个接口的单例对象

Question

single<ObserveLifeCycleState> { Communicator( domain = get(), repositoryMessanger = get() ) }

single<NewMessageListener> { Communicator( domain = get(), repositoryMessanger = get() ) }

如您所见，我正在实例化相同的 2 个对象，因为它实现了两个接口。但这会创建 2 个不同的对象。只用一次初始化怎么办？

Answer 1

 single {
        Communicator(
            domain = get(),
            repositoryMessanger = get()
        )
    }
    single {
        val communicator: Communicator = get()

        communicator as NewMessageListener
    }

Answer 2

这是将单个实例绑定到多个接口的惯用方法。

single { 
    Communicator(get(), get())
}
single<NewMessageListener> { 
    get<Communicator>()
}
single<ObserveLifeCycleState> {
    get<Communicator>()
}

创建实现 2 个接口的单例对象

Create singleton object which implements 2 interfaces

koin