Hint spinner that allows showing a list Data in The Form Of Spinner

 Example of HintSpinner 

1- step  : Add dependencies on gradle.

implementation 'me.srodrigo:androidhintspinner:1.0.0'

2- step- add simple spinner view in our xml folder:

<?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"
    tools:context=".MainActivity">

    <Spinner
        android:id="@+id/spnDrop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

3- Main Activity code for give list of data

package com.example.examplehintspinner

import android.annotation.SuppressLint
import android.os.Bundle
import android.widget.Spinner
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import me.srodrigo.androidhintspinner.HintAdapter
import me.srodrigo.androidhintspinner.HintSpinner
class MainActivity : AppCompatActivity() {
    private lateinit var spinner: Spinner
    private lateinit var data:ArrayList<String>
    @SuppressLint("MissingInflatedId")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        spinner = findViewById(R.id.spnDrop)


        data = ArrayList()
        data.add("Delhi")
        data.add("Haridwar")
        data.add("Haryana")
        data.add("Rotak")
        data.add("Punjab")
        data.add("Ludhiyana")
        data.add("Dehradun")
        data.add("Ut")

        setSpringList()



    }

    private fun setSpringList() {
        val hintSpinner = HintSpinner<String>(
            spinner,  // Default layout - You don't need to pass in any layout id, just your hint text and
            // your list data
            HintAdapter<String>(this, "Select String", data)
        ) { position, itemAtPosition ->
            Toast.makeText(this@MainActivity,itemAtPosition,Toast.LENGTH_SHORT).show()
            // Here you handle the on item selected event (this skips the hint selected event)
        }
        hintSpinner.init()

    }

}

step-4: for further inquiry github link 

https://github.com/srodrigo/Android-Hint-Spinner