如何同步从LiveData获得价值? [英] How to get value from LiveData synchronously?

问题描述

对于 LiveData ，是否有与RxJava的Observable中的 blockingNext 或 blockingSingle 类似的东西来同步获取值?如果没有，我如何实现相同的行为?

For LiveData, is there something similar to blockingNext or blockingSingle in RxJava's Observable to get the value synchronously? if not, how can i achieve the same behavior?

推荐答案

您可以调用 getValue()返回当前值(如果有).但是，没有阻塞直到有值"选项.通常，这是因为 LiveData 是要在主应用程序线程上使用的，因此应避免无限阻塞调用.

You can call getValue() to return the current value, if there is one. However, there is no "block until there is a value" option. Mostly, that is because LiveData is meant to be consumed on the main application thread, where indefinitely-blocking calls are to be avoided.

如果您需要阻塞直到有一个值"，请使用RxJava并确保您在后台线程上进行观察.

If you need "block until there is a value", use RxJava and ensure that you are observing on a background thread.

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