禁用底部导航控制器中的当前选项卡 [英] Disabling the current tab in a bottom navigation controller

问题描述

我使用 Jetpack Navigation 来处理底部导航控制器.效果很好；但是，我正在寻找一种改进用户体验的方法.

I'm using Jetpack Navigation to handle the bottom navigation controller. It works great; however, I am looking for a way to improve the UX.

是否可以禁用用户当前导航到的标签?

我可以垃圾邮件"底部导航中的当前选项卡，它会重新加载数据和不必要的用户界面.如果这种行为(重新点击当前选项卡)是有意的，有没有办法保留片段的状态，以便在导航离开时&到，它不会重新创建?

I'm able to "spam" the current tab in the bottom navigation, which reloads data & the UI unnecessarily. If this behavior (of re-tapping the current tab) is intended, is there a way to retain the state of the fragment, so that when navigated away & to, it doesn't recreate?

我如何处理底部导航:

navController = NavHostFragment.findNavController(navigation_host_fragment)
NavigationUI.setupWithNavController(bottom_navigation_view, navController)

推荐答案

根据 这个问题:

随意设置一个OnNavigationItemReselectedListener，它优先于NavigationUI设置的OnNavigationItemSelectedListener:setOnNavigationItemReselectedListener

Feel free to set a OnNavigationItemReselectedListener, which takes precedence over the OnNavigationItemSelectedListener set by NavigationUI: setOnNavigationItemReselectedListener

bottom_navigation_view.setOnNavigationItemReselectedListener {
  // Do nothing
}

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