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Fragment Lifecycle guide When Using ViewBinding with Navigation Component in Android 14

👀 Views: 2 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-08
android fragment viewbinding navigation-component Kotlin

I'm converting an old project and I'm working on a personal project and I'm working with an scenario with my Fragment's lifecycle when using ViewBinding in combination with the Navigation Component in Android 14... The question arises when I navigate back to a Fragment that utilizes ViewBinding; the views don't seem to be properly initialized, and I get a `NullPointerException` when trying to access them. Here's a snippet showing how I set up my Fragment: ```kotlin class MyFragment : Fragment() { private var _binding: MyFragmentBinding? = null private val binding get() = _binding!! override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { _binding = MyFragmentBinding.inflate(inflater, container, false) return binding.root } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) binding.myButton.setOnClickListener { // Perform action } } override fun onDestroyView() { super.onDestroyView() _binding = null } } ``` When I navigate away from this Fragment and return, I notice that `onCreateView` is called again, but the binding is not being set correctly. I have also tried doing a `println` in `onCreateView` to check when the binding is being initialized, and it appears to be happening correctly. However, when I use the back button to return to this Fragment, accessing `binding.myButton` throws a `java.lang.NullPointerException`. I have double-checked that I am properly clearing the binding in `onDestroyView`, and I am using the latest version of the Navigation Component (2.5.0). Any insights on what might be going wrong here or best practices for managing Fragment lifecycles with ViewBinding? This is part of a larger web app I'm building. Is there a better approach? I've been using Kotlin for about a year now. What are your experiences with this?