对话框屏蔽home

对话框屏蔽home
alert.show();
alert.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);


activity屏蔽home
    @Override
    public void onAttachedToWindow() {
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
    super.onAttachedToWindow();
    }