Jetpack 导航动画完整侦听器 [英] Jetpack Navigation Animation Complete Listener

问题描述

我正在尝试使用 Jetpack Navigation 库在新导航事件完成时获得回调，以便更改状态栏颜色.

I'm trying to get a callback, using the Jetpack Navigation library, when a new navigation event is completed in order to change the status bar color.

到目前为止我发现navController.addOnDestinationChangedListener它会在新导航开始时通知我，但不会在它完成时通知我，这意味着进入/退出转换已经完成.

So far I've found navController.addOnDestinationChangedListener which notifies me when a new navigation starts but not when it completes, meaning that the enter/exit transitions have completed.

有什么方法可以知道所有导航转换何时完成?

Is there any method to know when all navigation transitions have completed?

推荐答案

你可以这样使用:

val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment)
navHostFragment?.childFragmentManager?.addOnBackStackChangedListener {
    val currentFragment = navHostFragment.childFragmentManager.fragments.firstOrNull()
    if (currentFragment is YourFragment) {
        // your code here  
    } 
}

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