A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution

Question

All of sudden I start getting this error, and I am not getting idea why if anyone just let me know where this error is, will be enough helpful. As much I am able to get is t

Answer 1

In my case it was because I was not implementing Observable in my ViewModel. I added an EditText to the constraint layout with android:text="@={addProductViewModel.inputProductName}"

Once I implemented Observable in my ViewModel class the error was gone

ViewModel

class AddProductViewModel (
    private val repository: ProductRepository,
    private val context: Context
): ViewModel(), Observable {

    @Bindable
    val inputProductName = MutableLiveData()


    fun addProduct() {
        //inputProductName.value
    }

    override fun removeOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback?) {
        TODO("Not yet implemented")
    }

    override fun addOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback?) {
        TODO("Not yet implemented")
    }
}

Complete example for MVVM Databinding using Fragments

Layout - add_product.xml

AddProductFragment

class AddProductFragment: Fragment() {
    private lateinit var binding: AddProductBinding
    private lateinit var addProductViewModel: AddProductViewModel
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding =  DataBindingUtil.inflate(inflater, R.layout.add_product, container, false)
        val dao = SubscriberDatabase.getInstance(requireActivity().applicationContext).productDAO
        val repository = ProductRepository(dao)
        val factory = AddProductViewModelFactory(repository, requireActivity().applicationContext)
        addProductViewModel = ViewModelProvider(this, factory).get(AddProductViewModel::class.java)
        binding.addProductViewModel = addProductViewModel
        binding.lifecycleOwner = this
        val view = binding.root

        return view
    }
}

AddProductViewModel

class AddProductViewModel (
    private val repository: ProductRepository,
    private val context: Context
): ViewModel(), Observable {

    @Bindable
    val inputProductName = MutableLiveData()


    fun addProduct() {
        //inputProductName.value
    }

    override fun removeOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback?) {
        TODO("Not yet implemented")
    }

    override fun addOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback?) {
        TODO("Not yet implemented")
    }
}

Hope this helps R