问题描述
使用 Android体系结构的导航组件，我有以下内容导航图
Using Android Architecture's Navigation component, I have the following navigation graph
->[首页]->[文章列表]->[特定文章]
我也有一个指向 [Specific Article] 的深层链接.打开后，当前导航至 [Home] .
I also have a deeplink to [Specific Article]. When it is opened, navigating up currently goes to [Home].
我想合成一个后置堆栈，以便向上导航返回 [Articles List] (然后再次导航至 [Home] ).
I'd like to synthesise a backstack such that navigating up instead goes back to [Articles List] (and then on to [Home] if navigating again).
导航的方式是什么?
推荐答案
每个 NavDeepLinkBuilder文档，导航将目标的 startDestination 用于合成后备堆栈.如果您将目标分组为嵌套的导航图，则两者嵌套图的 startDestination 和根图的 startDestination 被添加到后堆栈中.这使您能够将 [Articles List] 作为嵌套图的 startDestination ，以将其添加到后退堆栈中.
Per the NavDeepLinkBuilder documentation, Navigation uses the startDestination of the destination for the synthetic back stack. If you Group destinations into a nested navigation graph, both the startDestination of the nested graph and the startDestination of the root graph are added to the back stack. This gives you the ability to have [Articles List] as the startDestination of the nested graph to add it to your back stack.
但是，强烈建议您将合成后背堆放得尽可能小-尽管深度为2或3(如此处所示)很好，但不建议超出此范围级别，以避免用户不得不反复轻击并单击后退"按钮以返回启动器的情况.
However, it is strongly recommended to keep your synthetic back stack as small as possible - while a depth of 2 or 3 (as here) is fine, it is not recommended to go much beyond that level to avoid cases where users have to repeatedly tap and tap the back button to get back to the launcher.
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