MutableLiveData:无法在协程的后台线程上调用setValue [英] MutableLiveData: Cannot invoke setValue on a background thread from Coroutine

问题描述

我正在尝试从协程触发LiveData更新:

I'm trying to trigger an update on LiveData from a coroutine:

object AddressList: MutableLiveData<List<Address>>()
fun getAddressesLiveData(): LiveData<List<Address>> {
    AddressList.value = listOf()
    GlobalScope.launch {
        AddressList.value = getAddressList()
    }
    return AddressList
}

但出现以下错误:

IllegalStateException:无法在后台线程上调用setValue

IllegalStateException: Cannot invoke setValue on a background thread

有没有办法使其与协同程序一起工作?

Is there a way to make it work with coroutines?

推荐答案

使用liveData.postValue(value)代替liveData.value = value.这称为异步.

Use liveData.postValue(value) instead of liveData.value = value. It is called asynchronous.

来自文档:

postValue -将任务发布到主线程以设置给定值.

postValue - Posts a task to a main thread to set the given value.

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