Android: How to pause and resume a Count Down Timer?

Question

I have developed a Count Down Timer and I am not sure how to pause and resume the timer as the textview for the timer is being clicked. Click to start then click again to pa

Answer 1

Although the question doesn't include the Kotlin tag, I still think this answer belongs here due to Android tag.

I've made a very simple library that uses the CountDownTimer internally and inspired by this answer. So far, it works as intended with my very basic use case:

Pause the timer when the app/activity is paused, and resume when the app/activity resumes.

Usage:

class GameActivity : Activity() {

    private var timer = CustomTimer(30000, 1000) // 30 seconds duration at 1 second interval

    override fun onCreate(savedInstanceState: Bundle?) {
        ...
        timer.onTick = { millisUntilFinished ->
            textView.text = "seconds remaining: " + millisUntilFinished / 1000
        }
        timer.onFinish = {
            TODO("do something here")
        }
    }

    override fun onResume() {
        super.onResume()
        timer.resume()
    }

    override fun onPause() {
        super.onPause()
        timer.pause()
    }
}

Source code:

Resumable CustomTimer.kt (50 lines)