TimerInButton.kt

        
                viewPdf.visibility = View.VISIBLE
                
                viewPdf.setOnClickListener {
                    //your action here
                }
                val countDown = 4000L
                val countDownTimer = object : CountDownTimer(countDown, 1000) {
                    override fun onFinish() {
                        viewPdf.visibility = View.GONE
                    }

                    override fun onTick(p0: Long) {
                        val text = "View Pdf ${p0 / 1000}"
                        viewPdf.text = text
                    }

                
                if (viewPdf.visibility == View.VISIBLE) {
                    countDownTimer.start()
                }