👀 Views: 43 💬 Answers: 1 📅 Created: 2025-06-10

android fragment view-binding navigation-component kotlin

I'm migrating some code and I'm following best practices but After trying multiple solutions online, I still can't figure this out... Hey everyone, I'm running into an issue that's driving me crazy. I'm working with an scenario with View Binding in a Fragment while using the Navigation Component in Android 14. Specifically, when I navigate from one Fragment to another, I am experiencing a NullPointerException when attempting to access the binding object. My setup is as follows: In my `FirstFragment`, I navigate to `SecondFragment` on a button click: ```kotlin class FirstFragment : Fragment() { private var _binding: FragmentFirstBinding? = null private val binding get() = _binding!! override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { _binding = FragmentFirstBinding.inflate(inflater, container, false) return binding.root } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { binding.navigateButton.setOnClickListener { findNavController().navigate(R.id.action_firstFragment_to_secondFragment) } } override fun onDestroyView() { super.onDestroyView() _binding = null // Clear the binding reference here } } ``` In `SecondFragment`, I have similar View Binding setup: ```kotlin class SecondFragment : Fragment() { private var _binding: FragmentSecondBinding? = null private val binding get() = _binding!! override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { _binding = FragmentSecondBinding.inflate(inflater, container, false) return binding.root } override fun onDestroyView() { super.onDestroyView() _binding = null } } ``` The crash happens when I try to interact with a button in the `onViewCreated` method of `SecondFragment`. The behavior log shows: ``` java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View com.example.app.databinding.FragmentSecondBinding.getRoot()' on a null object reference ``` I've confirmed that the navigation action is working correctly, and the `SecondFragment` is being instantiated, but it seems like the binding is not being set correctly. I've also checked that the layout files for both fragments are correctly set up. Any insights into what could be causing this scenario or best practices for managing View Binding across Fragments in Android 14? I've tried ensuring that I'm clearing the binding in `onDestroyView`, but the question continues. How would you solve this? For context: I'm using Kotlin on Windows. I'm on Ubuntu 22.04 using the latest version of Kotlin. This issue appeared after updating to Kotlin 3.9. What's the correct way to implement this?