如何封装Android Coroutine Actor并将其仍与viewModelScope关联

如何解决如何封装Android Coroutine Actor并将其仍与viewModelScope关联

我正在我当前的Android项目中调查Kotlin协程演员。

目前我有以下课程

信使：

import kotlinx.coroutines.channels.SendChannel
import org.research.development.intentions.action.Sendable

class Messenger<T>(private val sendChannel: SendChannel<T>) : Sendable<T> {

    override suspend fun send(message: T) {
        sendChannel.send(message)
    }
}

ViewModel

abstract class BaseViewModel<I,S>(initialState: S) : ViewModel(),ViewModelable<I,S> {

    private val sendChannel: SendChannel<I> = viewModelScope.actor {
        for (message in channel) {
            dispatch(message)
        }
    }

    protected val internalStateFlow = MutableStateFlow(initialState)
    val stateFlow: StateFlow<S>
        get() = internalStateFlow

    private val messenger: Sendable<I> = Messenger(sendChannel)

    override fun send(message: I) {
        viewModelScope.launch(Dispatchers.IO) {
            messenger.send(message)
        }
    }
}

我想让Actors sendChannel在我的Messenger类中声明

    import kotlinx.coroutines.channels.SendChannel
    import org.research.development.intentions.action.Sendable
    
    class Messenger<T>() : Sendable<T> {

        private val sendChannel: SendChannel<I> = actor { // viewModelScope????
            for (message in channel) {
                dispatch(message) // HOW DO I CALL THIS METHOD????
            }
        }
    
        override suspend fun send(message: T) {
            sendChannel.send(message)
        }
    }

但这会给我带来两个问题

1). My Actor is no longer within my ViewModelScope
2). How do I call the ViewModel Dispatch method

解决问题2）。我可以将调度功能传递到Messenger类中

如何将角色与ViewModelScope相关联？

这整个方法有什么价值吗？

解决方法

您可以在Messenger类中传递viewmodelScope并从该范围调用actor。

private val sendChannel: SendChannel<I> = viewModelScope.actor {
    for (message in channel) {
        dispatch(message) 
    }
}

您还可以覆盖coroutineContext（我想Sendable是CoroutineScope的子类）

  override val coroutineContext: CoroutineContext
    get() = viewModelScope.coroutineContext