AutoComplete in Kotlin

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <AutoCompleteTextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/autocom">

    </AutoCompleteTextView>

</LinearLayout>

MainActivity.kt

package com.androinidan.myapplication


import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.AdapterView
import android.widget.ArrayAdapter
import android.widget.AutoCompleteTextView
import android.widget.Spinner
import android.widget.Toast

class MainActivity : AppCompatActivity() {

    var studentdata= arrayOf("Ashih","Swathi","Anuj","Raj", "Ashih","Swathi","Anuj","Raj",
        "Ashih","Swathi","Anuj","Raj", "Ashih","Swathi","Anuj","Raj","Ashih","Swathi","Anuj","Raj","451536234")


    var auto: AutoCompleteTextView?=null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.main)

        auto = findViewById(R.id.autocom)

        

        val adapter: ArrayAdapter<String> = ArrayAdapter<String>(this,
            android.R.layout.select_dialog_item, studentdata)
        auto!!.threshold = 1
        auto!!.setAdapter(adapter)


    }
}