Kotlin: Timer() の使い方

プログラム

MainActivity.kt

package com.example.timer01

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import java.util.*

class MainActivity : AppCompatActivity() {
    val timer = Timer()
    private val timerTask = Task()
    private val delay: Long = 0L
    private val interval: Long = 2000L

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main) // activity_mainのレイアウトを使用

        timer.scheduleAtFixedRate(timerTask, delay, interval)
    }

    class Task : TimerTask() {
        var count = 0
        override fun run() {
            println("count = " + count)
            count += 1
        }
    }

    override fun onStop() {
        super.onStop()
        timer.cancel()
    }
}

実行結果

13:12:59.468  I  count = 3
13:13:01.468  I  count = 4
13:13:03.468  I  count = 5
13:13:05.469  I  count = 6
13:13:07.468  I  count = 7
13:13:09.469  I  count = 8
13:13:11.468  I  count = 9
13:13:13.468  I  count = 10
13:13:15.468  I  count = 11