with vibration

CupNoodleTimer2.kt

package com.example.cupnoodletimer

import android.content.Context
import android.os.Bundle
import android.os.CountDownTimer
import android.os.VibrationEffect
import android.os.Vibrator
import android.widget.Button
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

    val TIMERTIME: Long = 180000;
    lateinit var timerText: TextView
    lateinit var timer: CountDownTimer
    var isRunning: Boolean = false;

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val startButton: Button = findViewById(R.id.buttonStart)
        val vibrator = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator

        startButton.setOnClickListener {
            if (isRunning) {
                timer.cancel()
                setTime(TIMERTIME)
                isRunning = false
                startButton.text = "START"
            } else {
                timer = object : CountDownTimer(TIMERTIME, 1000) {
                    override fun onTick(millisUntilFinished: Long) {
                        setTime(millisUntilFinished)
                    }
                    override fun onFinish() {
                        setTime(0)
                        isRunning = false
                        startButton.text = "RESTART"
                        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                            val vibrationEffect = VibrationEffect.createOneShot(5000, VibrationEffect.DEFAULT_AMPLITUDE)
                            vibrator.vibrate(vibrationEffect)
                        } else {
                            vibrator.vibrate(5000)
                        }
                    }
                }
                timer.start()
                isRunning = true
                startButton.text = "RESET"
            }
        }
    }

    private fun setTime(t: Long) {
        timerText = findViewById(R.id.textViewTime)
        var time: Long = t
        var minutes: Long = (time / 1000) / 60
        var seconds: Long = (time / 1000) % 60
        timerText.setText("%d:%02d".format(minutes, seconds))
    }
}