Android 如何屏蔽Home键

Android 如何屏蔽Home键（长按短按都不起作用）。

package com.test.qiao;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.WindowManager;

public class ZZZActivity extends Activity {

    private boolean flag = true;//true位屏蔽，false位不屏蔽

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    @Override
    public void onAttachedToWindow() {
        if(flag) {
            this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
        }
        super.onAttachedToWindow();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_HOME){
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
}

原文链接： http://blog.csdn.net/hopezhangbo/article/details/7356541