Fragment Transition Animation optimization guide Correctly with ViewPager2 in Android
After trying multiple solutions online, I still can't figure this out. I'm not sure how to approach This might be a silly question, but I'm working on a project and hit a roadblock. I'm experiencing issues with fragment transitions when using `ViewPager2` in my Android application. I set up a `ViewPager2` with a `FragmentStateAdapter`, and while the pages swipe correctly, the custom transition animations I've implemented don't seem to execute as expected. Instead of a smooth transition, the fragments abruptly appear and disappear without the intended animations. Here's a simplified version of how I set up the `ViewPager2`: ```kotlin class MyFragmentStateAdapter(fragmentActivity: FragmentActivity) : FragmentStateAdapter(fragmentActivity) { override fun getItemCount(): Int = 3 override fun createFragment(position: Int): Fragment { return when (position) { 0 -> FragmentOne() 1 -> FragmentTwo() 2 -> FragmentThree() else -> FragmentOne() } } } ``` And in my activity, I initialize the `ViewPager2` like this: ```kotlin val viewPager: ViewPager2 = findViewById(R.id.viewPager) viewPager.adapter = MyFragmentStateAdapter(this) ``` For the transition animations, I'm using the following code in my fragments to start the animations: ```kotlin override fun onResume() { super.onResume() val transition = TransitionInflater.from(requireContext()).inflateTransition(R.transition.fade_transition) sharedElementEnterTransition = transition } ``` The scenario arises when I swipe between fragments. Instead of seeing the fade-in and fade-out effects, the transitions seem to skip entirely, leading to a jarring user experience. I've tried adjusting the transition duration and ensuring that the transitions are properly defined in the XML. Here’s how I defined the transition in `res/transition/fade_transition.xml`: ```xml <fade xmlns:android="http://schemas.android.com/apk/res/android" android:duration="300" /> ``` I've also checked that my `ViewPager2` is not using any `PageTransformer` which might interfere with the transitions, but I still face the same question. Is there something I might be overlooking in the setup or implementation that would prevent my custom transitions from functioning correctly? Any guidance on achieving the desired animation would be greatly appreciated! For context: I'm using Kotlin on Linux. Any help would be greatly appreciated! Am I missing something obvious? What am I doing wrong? This is for a desktop app running on Linux.