即使禁用旋转，片段字段有时也为空

Question

我将数据传递给片段实例变量，然后在提交时，正在引用该数据。出于某种原因，该字段有时会在提交时被取消。即使应用程序没有旋转，我是否必须以某种方式保留该字段？

将数据传递给片段

                Fragment fragment = Fragment.newInstance();
                fragment.data= data;

正在创建片段交易

            fragmentTransaction.hide(this);
            fragmentTransaction.add(R.id.container, fragment);
            fragmentTransaction.addToBackStack(backStackClass);
            fragmentTransaction.commitAllowingStateLoss();

提交侦听器的数据句柄

            private data data;                

            private OnSingleClickListener submitListener = new 
            OnSingleClickListener() {
    @Override
    public void onSingleClick(View v) {


        String id = data.getQuestionId;  // error occured on this line because data was 
                           // null

        });

错误跟踪

            Fatal Exception: java.lang.NullPointerException: Attempt to 
            invoke virtual method 'java.lang.String 
            com.expa.Data.getQuestionId()' on a null object reference
            at com.expa.fragments.Fragment$1.onSingleClick(Unknown Source)
            at com.expa.Listener.OnSingleClickListener.onClick(Unknown 
            Source)