android屏蔽Home键

@Override  public void onAttachedToWindow() {          super.onAttachedToWindow();  //该方法黑屏    //this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);    //该方法背景透明    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);  }