android fragment viewmodel initialization failed

Question

I'm trying to implement data-binding in android with kotlin:

override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        mBinding = DataBindingUtil.inflate<ViewDataBinding>(
            inflater, R.layout.fragment_login, container, false
        ) as FragmentLoginBinding
        val view: View = mBinding.root
        mBinding.login?.invoke(viewModel)
        return view
    }

But it says lateinit property viewModel has not been initialized on runtime. How can I resolve this ?

• Initializing in fragment will work
• It will better if you guys provide me with viewmodel initialized from parent, parent is an activity

Answer 1

Here is the thing worked for me :

mBinding = DataBindingUtil.inflate<ViewDataBinding>(
            inflater, R.layout.fragment_login, container, false
        ) as FragmentLoginBinding
        val view: View = mBinding.root
        viewModel = ViewModelProvider(requireActivity()).get(AuthViewModel::class.java)
        mBinding.login = viewModel
        return view

In XML :

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <variable
            name="login"
            type="com........." />
    </data>
    ....