Android KeyEvent和keycode之间的区别

概述有什么不同？ public boolean onKeyDown(int keyCode,KeyEvent event) 参数是keyCode,按钮,用户按下,但KeyEvent是什么？ 阅读 docs Object used to report key and button events. Each key press is described by a sequence of key event 有什么不同？
public boolean onKeyDown(int keyCode,KeyEvent event)
参数是keyCode,按钮,用户按下,但KeyEvent是什么？解决方法 阅读 docs

Object used to report key and button events. Each key press is described by a sequence of key events. A key press starts with a key event with ACTION_DOWN. If the key is held sufficIEntly long that it repeats,then the initial down is followed additional key events with ACTION_DOWN and a non-zero value for getRepeatCount(). The last key event is a ACTION_UP for the key up. If the key press is canceled,the key up event will have the FLAG_CANCELED flag set.

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