键盘按下和抬起事件（onKeyDown和onKeyUp）

package com.luohaibo.testdemo08;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//按键按下事件
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
//输出按键代码
Log.d("onkeyDown:KeyCode", String.valueOf(keyCode));
//输入按键的重复次数
Log.d("onKeyCodeDown:RepeatCount", String.valueOf(event.getRepeatCount()));
//如果重复次数到了200（8秒左右），显示提示信息
if (event.getRepeatCount() == 200) {
Toast.makeText(this, "已经按了一会儿，累了吧，该松开了", Toast.LENGTH_LONG).show();

}
//如果按下的是“菜单”按钮，输出日志信息
if (keyCode == KeyEvent.KEYCODE_MENU) {
Log.d("onKeyDown", "MenuKey Down");

}

return super.onKeyDown(keyCode, event);

}
//按键抬起事件
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub

if (keyCode == KeyEvent.KEYCODE_MENU) {
Log.d("onKeyUp", "MenuKey Up");

}
return super.onKeyUp(keyCode, event);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}