为什么我的showPopup是灰色的，而我已经在那个片段的xml上有了一个OnClick方法？
当我点击带有OnClick的按钮时，我试图弹出popup_about_app XML。

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    myDialog = new Dialog(getContext());
    return inflater.inflate(R.layout.fragment_settings, container, false);
}

public void showPopup(View view) {
    TextView txtclose;

    myDialog.setContentView(R.layout.popup_about_app);
    txtclose =(TextView) myDialog.findViewById(R.id.txtClose);
    txtclose.setText("X");

    txtclose.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            myDialog.dismiss();
        }
    });

    myDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
    myDialog.show();
}