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为屏蔽，false、为不屏蔽
	
    @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);
	}
}