Fragment Lifecycle Issues with ViewPager2 and Nested Scrolling in Android 14
I'm currently facing a challenge with Fragment lifecycle management when using ViewPager2 in combination with nested scrolling in my Android app targeting API level 34. The issue arises when I swipe between fragments in the ViewPager2; sometimes, the onPause() method of the current fragment doesn't get called, leading to unexpected behavior like lingering animations or ongoing network calls. I've ensured that my fragments are properly handling lifecycle methods, but the inconsistency persists. I've implemented the ViewPager2 as follows: ```kotlin class MyPagerAdapter(fragmentActivity: FragmentActivity) : FragmentStateAdapter(fragmentActivity) { override fun getItemCount(): Int = 3 override fun createFragment(position: Int): Fragment { return when (position) { 0 -> FirstFragment() 1 -> SecondFragment() 2 -> ThirdFragment() else -> throw IllegalArgumentException("Invalid position") } } } ``` In my Activity, I initialize the ViewPager2 with this adapter: ```kotlin val viewPager: ViewPager2 = findViewById(R.id.viewPager) viewPager.adapter = MyPagerAdapter(this) ``` Additionally, I've set the ViewPager2 to handle nested scrolling by using the following configuration: ```kotlin viewPager.isNestedScrollingEnabled = true ``` However, I noticed that the `onStop()` method of the fragments is consistently called, while `onPause()` is hit sporadically, especially when swiping quickly. This causes issues when I try to cancel ongoing tasks or animations in `onPause()`, as they sometimes continue running in the background. I've also tried using `setUserVisibleHint()` and `onVisibilityChanged()` to manage state, but that doesn't seem to resolve the inconsistency. Is there a recommended approach to ensure that the Fragment lifecycle methods are reliably triggered in this setup? Or could there be any known issues with ViewPager2 that might cause this behavior in Android 14?