Android kotlin: AlertDialog EditText programmatically

Android AlertDialog can be used to display the dialog message with OK and Cancel buttons. It can be used to interrupt and ask the user about his/her choice to continue or discontinue.AlertDialog EditText programmatically is composed of three  regions: title, content area and action buttons. Android AlertDialog is the subclass of Dialog class.
MainActivity.kt

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val context = this
        button.setOnClickListener {
            val builder = MaterialAlertDialogBuilder(context)
            // dialog title
            builder.setTitle("Tell us your name.")
            // dialog message view
            val constraintLayout = getEditTextLayout(context)
            builder.setView(constraintLayout)
            val textInputLayout = constraintLayout.
                findViewWithTag<TextInputLayout>("textInputLayoutTag")
            val textInputEditText = constraintLayout.
                findViewWithTag<TextInputEditText>("textInputEditTextTag")
            // alert dialog positive button
            builder.setPositiveButton("Submit"){dialog,which->
                val name = textInputEditText.text
                textView.text = "Hello, $name"
            }
            // alert dialog other buttons
            builder.setNegativeButton("No",null)
            builder.setNeutralButton("Cancel",null)
            // set dialog non cancelable
            builder.setCancelable(false)
            // finally, create the alert dialog and show it
            val dialog = builder.create()
            dialog.show()
            // initially disable the positive button
            dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
            // edit text text change listener
            textInputEditText.addTextChangedListener(object : TextWatcher {
                override fun afterTextChanged(p0: Editable?) {
                }
                override fun beforeTextChanged(p0: CharSequence?, p1: Int,
                                               p2: Int, p3: Int) {
                }
                override fun onTextChanged(p0: CharSequence?, p1: Int,
                                           p2: Int, p3: Int) {
                    if (p0.isNullOrBlank()){
                        textInputLayout.error = "Name is required."
                        dialog.getButton(AlertDialog.BUTTON_POSITIVE)
                            .isEnabled = false
                    }else{
                        textInputLayout.error = ""
                        dialog.getButton(AlertDialog.BUTTON_POSITIVE)
                            .isEnabled = true
                    }
                }
            })
        }
    }
}

// get edit text layout
fun getEditTextLayout(context:Context):ConstraintLayout{
    val constraintLayout = ConstraintLayout(context)
    val layoutParams = ConstraintLayout.LayoutParams(
        ConstraintLayout.LayoutParams.MATCH_PARENT,
        ConstraintLayout.LayoutParams.WRAP_CONTENT
    )
    constraintLayout.layoutParams = layoutParams
    constraintLayout.id = View.generateViewId()
    val textInputLayout = TextInputLayout(context)
    textInputLayout.boxBackgroundMode = TextInputLayout.BOX_BACKGROUND_OUTLINE
    layoutParams.setMargins(
        32.toDp(context),
        8.toDp(context),
        32.toDp(context),
        8.toDp(context)
    )
    textInputLayout.layoutParams = layoutParams
    textInputLayout.hint = "Input name"
    textInputLayout.id = View.generateViewId()
    textInputLayout.tag = "textInputLayoutTag"

    val textInputEditText = TextInputEditText(context)
    textInputEditText.id = View.generateViewId()
    textInputEditText.tag = "textInputEditTextTag"
    textInputLayout.addView(textInputEditText)
    val constraintSet = ConstraintSet()
    constraintSet.clone(constraintLayout)
    constraintLayout.addView(textInputLayout)
    return constraintLayout
}

// extension method to convert pixels to dp
fun Int.toDp(context: Context):Int = TypedValue.applyDimension(
    TypedValue.COMPLEX_UNIT_DIP,this.toFloat(),context.resources.displayMetrics
).toInt()

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/constraintLayout"
    tools:context=".MainActivity">
    <com.google.android.material.button.MaterialButton
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:text="Show Dialog"
        android:backgroundTint="#0048BA"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="32dp"
        tools:text="Hello, Name"
        android:textAppearance="@style/TextAppearance.AppCompat.Large"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button" />
</androidx.constraintlayout.widget.ConstraintLayout>

res/values/styles.xml [update]

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.MaterialComponents.Light">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>
</resources>

build.gradle dependencies[add]

implementation 'com.google.android.material:material:1.1.0'

Result

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