解決lateinit property xxx has not been initialized
我一開始在companion object 中定義類變數 lateinit var countDownTimer: CountDownTimer
懶載入的變數是在沒初始化之前是不允許做判空操作的，要先判斷是否初始化
然後用的時候發現做了判斷是否初始化是報錯的
解決方案是在定義的時候就寫一個判斷初始化的方法 然後通過這個方法去得到是否初始化，有點類似於 我們平時定義的getter setter方法
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解決lateinit property xxx has not been initialized
我一開始在companion object 中定義類變數 lateinit var countDownTimer: CountDownTimer 懶載入的變數是在沒初始化之前是不允許做判空操作的，要先判斷是否初始化 然後用的時候發現做了判斷是否初始化是報錯的 解決方案是在定義的
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