[android ]Pass data from first fragment to second fragment using MVVM pattern

Let's suppose we have two fragments in a single activity. If we are using MVVM android design patter then we need to familiar about view model class.

1.  you need to create a fragment 1. In this case we have fragment-1 name is UserProfileFragment. 

You can pass user profile info to another fragment when user is clicked on next button on the screen.

class UserProfileFragment : BaseFragment() {

private lateinit var model: UserViewModel

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    model = activity?.run {
        ViewModelProvider(this).get(UserViewModel::class.java)
    } ?: throw Exception("Invalid Fragment")

}
R.id.button_next -> {
    //Code statements
    if(validateUserDetails()) {
        var first_name : String =edit_firstname.getText().toString();
        var last_name : String =edit_lastname.getText().toString();
        var dob : String =edit_date.getText().toString();
        val user = UserData(first_name, last_name, dob)
        model.setUserdata(user)
        
    }
}

}

2. You need to create the view model class to keep the object state.

class UserViewModel : ViewModel()  {
  
    var data = MutableLiveData<UserData>()
   

    fun setUserdata(user: UserData) {
        data.value = user;
    }
}
3.  you need to create a fragment-2 . In this case we have fragment-2 name is UserDetailFragment. 
We can receive the user profile info in fragment-2 which is coming from fragment "UserProfileFragment" when user is clicked on next button on the screen.
class UserDetailFragment : BaseFragment(){
    private val TAG = UserDetailFragment::class.java.name
    private lateinit var tv_firstname : TextView
    private lateinit var tv_lastname : TextView
    private lateinit var tv_user_age : TextView
    private lateinit var button_previous: TextView;

    companion object {
        fun newInstance() = UserDetailFragment()
    }
    private lateinit var model: UserViewModel

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

    }

    override fun getLayoutId(): Int {
        return R.layout.fragment_userdetail
    }
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        tv_firstname = view.findViewById(R.id.tv_firstname)
        tv_lastname = view.findViewById(R.id.tv_lastname)
        tv_user_age = view.findViewById(R.id.tv_user_age)
        button_previous = view.findViewById(R.id.button_previous)
        button_previous.setOnClickListener(this)
        model = activity?.run {
            ViewModelProvider(this).get(UserViewModel::class.java)
        } ?: throw Exception("Invalid Activity")
        model.data.observe(this, Observer<UserData> { item ->
            // Update the UI
            Log.i(TAG, "onCreate ::  start " +item.first_name)
            tv_firstname.setText("First Name:" +item.first_name);
            tv_lastname.setText("Last Name: "+item.last_name);
            tv_user_age.setText("Age: "+ageCalc(item.date_of_birth).toString());
        })
    }