How to create timer with handler

Question

Need to create stopwatch in android, for now I'v got somethink like this, simple function to start counting and display time, but i dont know what am I doing wrong with postdelayed:

fun runTimer() {
        val timeView = findViewById<TextView>(R.id.time_view)
        val handler = Handler()
        handler.post(Runnable {
            var hours = seconds / 3600
            var minutes = (seconds % 3600) / 60
            var secs = seconds % 60
            var time = String.format("%d:%02d:%02d", hours, minutes, secs)
            timeView.setText(time)
            if (running) {
                seconds++
            }
            handler.postDelayed(this, 1000)
        })
    }

what exactly should i put instead of this? (need to be runnable type)

Answer 1

I believe in your use case the most suitable solution would be to use a Chronometer - you can read more about it here. Also if you want to watch a video tutorial you can check this video. Hope this helps. Additionally if you want to have the functionality to be able to set a specific time frame and countdown using a CountDownTimer is a good option - documentation