Play Song In Android Studio on Button Click Using Kotlin

package com.example.soundeffect

import android.media.AudioManager
import android.media.MediaPlayer
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Toast
import java.io.IOException

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }

    var url:String="https://dl.prokerala.com/downloads/ringtones/files/dl/mp3/turkish-ringtone-melody-black-ringtone-br-mp3-160k-54995.mp3"
    var mediaPlayer=MediaPlayer()

    fun playsong(view: View){
        mediaPlayer!!.setAudioStreamType(AudioManager.STREAM_MUSIC)
        if(!mediaPlayer!!.isPlaying){

            Toast.makeText(this,"The Song is now Playing",Toast.LENGTH_SHORT).show()
            try{
                mediaPlayer!!.setDataSource(url)
                mediaPlayer.prepare()
                mediaPlayer.start()
            }
            catch (e:IOException){
                e.printStackTrace()
            }
        }
        else{
            Toast.makeText(this,"The Song is now Stopped",Toast.LENGTH_SHORT).show()
            try{
                mediaPlayer.pause()
                mediaPlayer.stop()
                mediaPlayer.reset()
            }
            catch (e:IOException){
                e.printStackTrace()
            }


        }
    }
}