Android等待2秒执行，每隔2秒执行

等待2秒执行
1.使用Handler

Handler().postDelayed({
                mDialog.dismiss()
            }, 2000)

2.使用Timer

 Timer().schedule(2000){
                mDialog.dismiss()
            }

3.使用协程

 MainScope().launch{
                delay(2000)
                mDialog.dismiss()
            }

每隔2秒执行
1.Handler+Runnable

 private val handler by lazy { Handler() }
 private val runnable by lazy {
        object : Runnable {
            override fun run() {
                i("11111")
                handler.postDelayed(this, 2000)
            }
        }
    }

 //启动
 handler.post(runnable)
 //销毁
 handler.removeCallbacks(runnable)

2.Timer和TimerTask

 private val timer by lazy { Timer() }
 private val task  by lazy { object :TimerTask(){
        override fun run() {
            i("11111")
        }

    } }
//启动
timer.schedule(task, 2000, 2000)
//销毁
 timer.cancel()