转自:http://bbs.youkuaiyun.com/topics/390247832
setOnKeyListener捕捉按键,接收两次的解决方法
调用event.getAction()方法可以得到键盘的action:ACTION_DOWN, ACTION_UP, or ACTION_MULTIPLE.
if(event.getAction()==KeyEvent.ACTION_DOWN)或者if(event.getAction()==KeyEvent.ACTION_UP)做一次判断就OK了