从 RxJava 2 转向使用 Kotlin 流：多线程 #8008
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PassionPenguin
commented
Feb 8, 2021
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@lsvih 校对认领 |
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@zenblo 欢迎校对 |
ghost
reviewed
Feb 25, 2021
| For a long time RxJava was undisputed leader for reactive solutions on Android, though with Kotlin expansion and introducing cold streams (Flow) seems situation might be rapidly changing in the coming years. | ||
| Though reactive programming is not related to threading in the first place, concurrency and parallelism are very important anyway. | ||
| In this article we’ll try to make short recap on threading in RxJava 2 (with some basic caveats on its usage) and then take a look at how threading works in Kotlin Flow, so if anyone would like to migrate their code without affecting functionality it would be nice and smooth. | ||
| 尽管 Kotlin 的不断扩展和冷流（Flow）的引入，可能会让未来几年的情况迅速地发生些改变，但长期以来，RxJava 一直是 Android 反应式解决方案的无可争议的领导者。虽说反应式编程最初与线程无关，但合适的线程的并发和并行对程序而言仍然非常重要。在本文中，我们将简要回顾 RxJava 2 中的线程（对其用法做一些基本说明），然后看一下 Kotlin Flow 中的线程的工作原理，让我们能在不影响功能的情况下能够顺利地完成代码迁移。 |
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| Let’s start from the short recap on RxJava 2. | ||
| 让我们从对 RxJava 2 的简短回顾开始。 |
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让我们从对 RxJava 2 的简短回顾开始
=>让我们先对 RxJava 2 做简短回顾
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| #### subscribeOn | ||
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| This is an operator which declares on which scheduler observable will be subscribed to. “Where it will be subscribed” means — “on which scheduler our chain will be started”. | ||
| 这是一个运算符用于声明将在哪一个调度器上设下一个 `Observable` 的订阅。“将在哪一个调度器上订阅”是指“将在哪个调度器上启动我们的执行程序”。 |
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这是一个运算符用于声明将在哪一个调度器上设下一个 Observable 的订阅
=>subscribeOn 是一个运算符用于声明将在哪一个调度器上设置一个 Observable 的订阅
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| So in our example above, by writing `flowOn(Dispatchers.IO)` we say that we want everything **before** it run on the IO. | ||
| 因此，在上面的示例中，通过编写`flowOn(Dispatchers.IO)`，我们告诉了程序我们希望在输入输出上运行执行所有代码。 | ||
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通过编写flowOn(Dispatchers.IO)
=>通过编写 flowOn(Dispatchers.IO)
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@PassionPenguin @lsvih 文章很棒！校对完成 |
等齐人一起修改（，谢谢你的校对嗷～ |
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@lsvih 校对认领 |
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@SamYu2000 欢迎校对~ |
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| > In RxJava there are also other types such as `Flowable`, `Single`, etc. In the article we’ll talk about `Observable` only because everything else applies to other types as well. | ||
| > 除了 `Observable` 以外，在 RxJava 中其实还有另外的类型，例如 `Flowable` 或是 `Single` 等。但在本文中，我们只会讲讲 `Observable`，因为它们之间是能够举一反三的。 |
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因为它们之间是能够举一反三的 => 因为它们的原理是相似的。
PassionPenguin
commented
Mar 11, 2021
PassionPenguin
commented
Mar 11, 2021
Co-authored-by: zenblo <[email protected]> Co-authored-by: samyu2000 <[email protected]>
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@lsvih 修改完啦 |
lsvih
approved these changes
Mar 11, 2021
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@PassionPenguin 已经 merge 啦~ 快快麻溜发布到掘金然后给我发下链接，方便及时添加积分哟。 掘金翻译计划有自己的知乎专栏，你也可以投稿哈，推荐使用一个好用的插件。 |
PassionPenguin
deleted the
translation/from-rxjava-2-to-kotlin-flow-threading
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@lsvih 漏翻译了…… |
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resolve #7974 @lsvih ψ(｀∇´)ψ
等待大佬们的校对～