Android AutoCompleteTextView Tutorials

AutoCompleteTextView is an editable text view that shows completion suggestions automatically while the user is typing. The list of recommendations is displayed in a drop-down menu from which the user can choose an item to replace the content of the edit box with.

Add listener

textview.setOnItemClickListener { parent, view, position, id ->
    //do something
}

AutoCompleteTextView in AlertDialog

Display the view in an AlertDialog in a fragment

<?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_marginBottom="16dp"
    android:layout_marginStart="16dp"
    android:layout_marginEnd="16dp"
    android:layout_marginTop="16dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <androidx.appcompat.widget.AppCompatAutoCompleteTextView
        android:id="@+id/textview"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

val builder = AlertDialog.Builder(activity!!)
builder.setTitle("Add a product")
builder.setMessage("")
val dialogView = activity!!.layoutInflater.inflate(R.layout.dialog_quotation_product, null)
builder.setView(dialogView)
builder.setPositiveButton("Finish") { _, _ ->
}
builder.setNegativeButton("Cancel") { _, _ ->
}
val dialog: AlertDialog = builder.create()
dialog.setCanceledOnTouchOutside(false)
dialog.show()
val autocompleteView = dialogView.findViewById<AppCompatAutoCompleteTextView>(R.id.textview)
val data = listOf("Java",
    "Swift",
    "Kotlin",
    "C++",
    "C#",
    "ReactNative",
    "Unity",
    "Real Engine")
val adapter = ArrayAdapter<String>(activity!!.applicationContext, android.R.layout.simple_list_item_1, data)
autocompleteView.setAdapter(adapter)
autocompleteView.setOnItemClickListener { parent, view, position, id ->
    //do something
}