攝即是空

/* [重要]可以攔截到按HOME的事件 */
@Override
public void onAttachedToWindow() {
 this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
 super.onAttachedToWindow();

}

/* [重要]可以攔截到按HOME的事件 */
@Override
public void onAttachedToWindow()
{
 this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
 super.onAttachedToWindow();
}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

  if (keyCode == KeyEvent.KEYCODE_HOME) {

 return true;

 } else { return super.onKeyDown(keyCode, event);

 }

}