AboutMe.kt

package com.example.aboutme

import android.content.Context
import android.inputmethodservice.InputMethodService
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.view.inputmethod.InputBinding
import android.view.inputmethod.InputMethodManager
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import androidx.databinding.DataBindingUtil
import com.example.aboutme.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {
    private lateinit var binding: ActivityMainBinding
    private val myName : Myname = Myname("Siddhesh Kumbhar")

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        //setContentView(R.layout.activity_main)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
        binding.myName = myName
        //findViewById<Button>(R.id.done_button).setOnClickListener { addNickname(it) }
        binding.doneButton.setOnClickListener { addNickname(it) }
    }

    private fun addNickname(view : View) {
        /*val editText = findViewById<EditText>(R.id.nickname_edit)
        val nicknameTextView = findViewById<TextView>(R.id.nickname_text)*/

        /*nicknameTextView.text = editText.text
        editText.visibility = View.GONE
        view.visibility = View.GONE
        nicknameTextView.visibility = View.VISIBLE*/

        binding.apply {
            //nicknameText.text = binding.nicknameEdit.text
            myName?.nickname = nicknameEdit.text.toString()
            invalidateAll()
            nicknameEdit.visibility = View.GONE
            doneButton.visibility = View.GONE
            nicknameText.visibility = View.GONE
        }
        //Hide the keyboard
        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        imm.hideSoftInputFromWindow(view.windowToken, 0)

    }
}