Android AlertDialog问题

public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
    final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle("Publisher");
    final String[] items={"Success","Failure"};
    builder.setItems(items, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            switch (which){
                case 0:
                    //success
                    break;
                case 1:
                    //failure
                    break;

            }
        }
    });
    return builder.create();

但是运行这个后不显示内容

现在问题解决了，我把整个继承Dialog Fragment的类删掉后创建换了个名字继承Dialog Fragment的类，所以问题都解决，目前不知道这个是什么情况，又没大神能说一说