android - ViewBinding in RecyclerView along with DiffUtils callback isn't working

Question

I'm trying to update/notify the adapter based on a value from the API call I get and I do have a DiffUtil callback in my adapter for the same. If I use viewBinding UI is not showing up but if I do use findViewById like this it seems to be working fine. Any help/leads appreciated. Thank you!

//ViewBinding ain't working along with DiffUtils for Some reason

    (view?.findViewById(R.id.recyclerView) as RecyclerView).apply {
            layoutManager = LinearLayoutManager(requireContext())
            adapter = temListAdapter
    }

    updateAdapter()
    with(binding) {
        submitBtn.setOnClickListener(this@ALFragment)
        cancelBtn.setOnClickListener(this@ALFragment)
        header.headerText.setOnClickListener(this@ALFragment)
        header.headerRightArrow.setOnClickListener(this@ALFragment)
    }

This Is how I am binding in this current Fragment

private val binding by viewBinding(FragmentConfirmBinding::bind)

And this is the ViewBinding Util class for the fragments am using

class FragmentViewBinding<T : ViewBinding>(val fragment: Fragment, val viewBindingFactory: (View) -> T) : ReadOnlyProperty<Fragment, T> {
    private var binding: T? = null

    init {
        // Note: There's an open issue of memory leaks with view binding in fragments
        // Solution: Destroying binding on fragment destroy thus observing fragment's lifecycle to clear binding when fragment is destroyed
        fragment.lifecycle.addObserver(object : DefaultLifecycleObserver {
            override fun onCreate(owner: LifecycleOwner) {
                fragment.viewLifecycleOwnerLiveData.observe(fragment, {
                    it.lifecycle.addObserver(object : DefaultLifecycleObserver {
                        override fun onDestroy(owner: LifecycleOwner) {
                            // clear this binding value when the views are destroyed
                            binding = null
                        }
                    })
                })
            }
        })
    }

    override fun getValue(thisRef: Fragment, property: KProperty<*>): T {
        val bindingRef = binding
        if (bindingRef != null) return bindingRef
        val lifecycle = fragment.viewLifecycleOwner.lifecycle
        if (!lifecycle.currentState.isAtLeast(Lifecycle.State.INITIALIZED)) {
            throw IllegalStateException(FRAGMENT_KILLED_EXCEPTION_TEXT)
        }
        return viewBindingFactory(thisRef.requireView()).also { binding = it }
    }

    companion object {
        private const val FRAGMENT_KILLED_EXCEPTION_TEXT = "Should not attempt to get bindings when Fragment views are destroyed."
    }
}

/**
 * Extension method for fragment view binding
 */
fun <T : ViewBinding> Fragment.viewBinding(viewBindingFactory: (View) -> T) = FragmentViewBinding(this, viewBindingFactory)

question from:https://stackoverflow.com/questions/65859889/viewbinding-in-recyclerview-along-with-diffutils-callback-isnt-working

Answer 1

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