kotlin.NotImplementedError: An operation is not implemented: not implemented
第一次使用kotlin寫的一小段程式碼就是一個button的點選事件
試運行了一下，專案直接停止運行了，還報瞭如下錯誤
問了度娘說是onclick方法裡面的TODO有導致的，但TODO是我實現了onClick方法後自動生成的方法，把它看成了和註釋相同的效果所以就沒在意，問了度娘才知道如果使用TODO方法始終會丟擲 NotImplementedError，指出未實現操作。
解決方法：刪除改方法同步專案即可
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