時間以内に２回タップしたら起きるプログラム on Activity with CoroutineScope

CoroutineScopeActivity.kt

class CoroutineScopeActivity : AppCompatActivity(), CoroutineScope {
    lateinit var job: Job
    override val coroutineContext: CoroutineContext
        get() = Dispatchers.Main + job

    private var goBackToSleepJob: Job? = null
    private var count: Int = 0
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        job = Job()

        // twice tap
        binding.button.setOnClickListener {
            count++
            if (count >= 2) {
                Timber.d("Wake Up!")
            }
            goBackToSleepJob?.cancel()
            goBackToSleepJob = launch {
                delay(5_000)
                Timber.d("Go Back To Sleep!")
                count = 0
            }
            goBackToSleepJob?.start()
        }
    }

}