View Binding en Dialog Fragment en Android Studio usando Kotlin

Mini apuntes de como implementar ViewBinding en un DialogFragment usando Android Studio y Kotlin.

Dependencias

En archivo gradle a nivel de aplicación añadir dentro del bloque android

android {
    ...
    buildFeatures {
        viewBinding true
    }
}

Layout

Crear archivo sdetail_dialog_fragment.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">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_first_fragment"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

View Binding en Dialog Fragment

En la implementación de Dialog Fragment es similar al Fragment pero extendiendo de DialogFragment.

class DetailDialogFragment : DialogFragment() {

    private var _binding: FragmentDetailBinding? = null
    private val binding get() = _binding!!

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        _binding = FragmentDetailBinding.inflate(layoutInflater)

        val dialog = MaterialAlertDialogBuilder(
            requireActivity()
        ).apply {
            setView(binding.root)

            setPositiveButton(getString(android.R.string.ok)) { _, _ ->
            }
            setOnKeyListener { _, keyCode, keyEvent ->
                if (keyCode == KeyEvent.KEYCODE_BACK && keyEvent.action == KeyEvent.ACTION_UP) {
                    dismiss()
                    true
                } else false
            }

        }.create()

        return dialog
    }


    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }

}

Llamar el DialogFragment

Des de donde queremos llamar el dialog fragment

private fun showSubmitFeedbackDialog() {
    val dialogTag = "DETAIL_PROPERTY"
    val navHostFragment = requireActivity().supportFragmentManager.fragments.first() as NavHostFragment
    if (navHostFragment.childFragmentManager.findFragmentByTag(dialogTag) != null) return

    val dialog = DetailDialogFragment()
    dialog.show(navHostFragment.childFragmentManager, dialogTag)
}

showSubmitFeedbackDialog()

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