存储单选按钮状态的Arraylist'；在androidstudio中使用set方法更新

我有一个带有自定义对象的arraylist，用于存储recyclerview的单选按钮状态。radiobutton状态保存在recyclerview中，每次回收视图时，视图都会携带状态。因此，我决定将单击按钮的状态保存在对象“RadioButtonStates”的arraylist中，该列表存储选中的id、单击的适配器位置以及是否单击了状态。我用伪值“false，0，0”填充arraylist，并在onclick方法中使用set方法更改radiobuttonstate的值。但是set方法不起作用。我觉得问题在于我指的是arraylist的一个实例，而不是arraylist。但是，当我将该方法声明为静态时，这并没有什么区别

public class WordQuestionAdapter extends RecyclerView.Adapter<WordQuestionAdapter.ViewHolder> {

Context mContext;
Random random = new Random();
ArrayList<WordMaps> wordList = new ArrayList<>();
//arraylist which stores buttonstates
private  static ArrayList<RadioButtonStates> buttonStates = new ArrayList<>();
//universalViewHolder object allows to get an instance of the holder from onBindViewholder in order to use available methods.
ViewHolder universalViewHolder;

private RadioGroup radioGroup;




public WordQuestionAdapter(Context context, ArrayList<WordMaps> wordMapsArrayList) {
    this.mContext = context;
    this.wordList = wordMapsArrayList;


}



public static class ViewHolder extends RecyclerView.ViewHolder {
    public CardView cardView;

    public RadioButton meaning_1, meaning_2, meaning_3, meaning_4;
    public RadioGroup radioGroup;

    public ViewHolder(CardView view) {
        super(view);
        cardView = view;

        meaning_1 = (RadioButton) cardView.findViewById(R.id.meaning_1);
        meaning_2 = (RadioButton) cardView.findViewById(R.id.meaning_2);
        meaning_3 = (RadioButton) cardView.findViewById(R.id.meaning_3);
        meaning_4 = (RadioButton) cardView.findViewById(R.id.meaning_4);
        radioGroup = (RadioGroup) cardView.findViewById(R.id.radio_group);


    }


}

@Override
public WordQuestionAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    CardView cV = (CardView) LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview, parent, false);
    radioGroup = (RadioGroup) cV.findViewById(R.id.radio_group);


//for loop which stores the dummy values in order to deal with NPE's
    for(int i = 0; i<5999;i++){
        buttonStates.add(i, (new RadioButtonStates(false, 0, 0)));

    }
    ViewHolder viewHolder = new ViewHolder(cV);


    return viewHolder;
}

@Override
public void onBindViewHolder(final ViewHolder holder, int position)

{

    Log.i("* Cases", "View binded");

    universalViewHolder = holder;
    final CardView cardView = holder.cardView;
    int true_random_position = random.nextInt(wordList.size());
    TextView wordText = (TextView) cardView.findViewById(R.id.word);


    switch (random.nextInt(3)) {

        case 0:

            Log.i("* Cases", "Case 0 called");
            wordText.setText(wordList.get(true_random_position).getWord());
            holder.meaning_1.setText(wordList.get(true_random_position).getMeaning());
            holder.meaning_2.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_3.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_4.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            onRadioButtonClicked(R.id.meaning_1);
            holder.meaning_1.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_2.setText(wordList.get(true_random_position).getMeaning());
            holder.meaning_3.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_4.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            onRadioButtonClicked(R.id.meaning_2);
             //Checks if radioButton is clicked. If boolean of getter and setter returns false,
            //then value is not clicked.
            if (!buttonStates.get(holder.getAdapterPosition()).getSetChecked()) {
                Log.i("* RadioGroup", "radioGroup cleared");
                holder.radioGroup.clearCheck();
            } else {
                Log.i("* RadioGroup", "radioGroup checked "+buttonStates.get(holder.getAdapterPosition()).getCheckedId());
                holder.radioGroup.check(buttonStates.get(holder.getAdapterPosition()).getCheckedId());
            }


            break;

        case 1:
            Log.i("* Cases", "Case 1 called");
            wordText.setText(wordList.get(true_random_position).getWord());
            Log.i("position", "" + position);
            Log.i("wordText", "" + wordList.get(true_random_position).getWord());
            holder.meaning_1.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_2.setText(wordList.get(true_random_position).getMeaning());
            holder.meaning_3.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_4.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            onRadioButtonClicked(R.id.meaning_2);
            //Checks if radioButton is clicked. If boolean of getter and setter returns false,
            //then value is not clicked.
            if (!buttonStates.get(holder.getAdapterPosition()).getSetChecked()) {
                Log.i("RadioGroup", "radioGroup cleared");
                holder.radioGroup.clearCheck();
            } else {
                Log.i("RadioGroup", "radioGroup checked"+buttonStates.get(holder.getAdapterPosition()).getCheckedId());
                holder.radioGroup.check(buttonStates.get(holder.getAdapterPosition()).getCheckedId());
            }

            break;
        case 2:
            Log.i("* Cases", "Case 2 called");
            wordText.setText(wordList.get(true_random_position).getWord());
            holder.meaning_1.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_2.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_3.setText(wordList.get(true_random_position).getMeaning());
            holder.meaning_4.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            onRadioButtonClicked(R.id.meaning_3);
            holder.meaning_1.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_2.setText(wordList.get(true_random_position).getMeaning());
            holder.meaning_3.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_4.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            onRadioButtonClicked(R.id.meaning_2);
            //Checks if radioButton is clicked. If boolean of getter and setter returns false,
            //then value is not clicked.
            if (!buttonStates.get(holder.getAdapterPosition()).getSetChecked()) {
                holder.radioGroup.clearCheck();
                Log.i("* RadioGroup", "radioGroup checked" + buttonStates.get(holder.getAdapterPosition()).getCheckedId());
            } else {
                holder.radioGroup.check(buttonStates.get(holder.getAdapterPosition()).getCheckedId());
                Log.i("* RadioGroup", "radioGroup checked" + buttonStates.get(holder.getAdapterPosition()).getCheckedId());
            }


            break;
        case 3:
            Log.i("* Cases", "Case 3 called");
            wordText.setText(wordList.get(true_random_position).getWord());
            holder.meaning_1.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_2.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_3.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_4.setText(wordList.get(true_random_position).getMeaning());
            onRadioButtonClicked(R.id.meaning_4);
            holder.meaning_1.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_2.setText(wordList.get(true_random_position).getMeaning());
            holder.meaning_3.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            holder.meaning_4.setText(wordList.get(random.nextInt(wordList.size())).getMeaning());
            onRadioButtonClicked(R.id.meaning_2);
            //Checks if radioButton is clicked. If boolean of getter and setter returns false,
            //then value is not clicked.

            if (!buttonStates.get(holder.getAdapterPosition()).getSetChecked()) {
                holder.radioGroup.clearCheck();
            } else {
                //else value is clicked
                holder.radioGroup.check(buttonStates.get(holder.getAdapterPosition()).getCheckedId());
            }


    }
    Log.i("* Adapter Position", ""+universalViewHolder.getAdapterPosition());
}

//Radiobutton which checks if the object being clicked is the right one
public void onRadioButtonClicked(final int checkButtonSelect){

    radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override

        public void onCheckedChanged(RadioGroup group, int checkedId) {

 universalViewHolder.getAdapterPosition();





            if(checkedId!=-1) {
                Log.i("* checkedButtonId", "" + checkedId);
                if (checkedId == checkButtonSelect) {
      buttonStates.set(universalViewHolder.getAdapterPosition(), new RadioButtonStates(true, checkedId, universalViewHolder.getAdapterPosition()));

                    //log statements which check if values were changed. Always returns false"
                    Log.i("* ButtonState id", "" + buttonStates.get(universalViewHolder.getAdapterPosition()).getCheckedId());
                    Log.i("* ButtonState position", "" +buttonStates.get(universalViewHolder.getAdapterPosition()).getAdapterPosition());
                    Toast.makeText(mContext, "CORRECT", Toast.LENGTH_SHORT).show();

                } else {

                   buttonStates.set(universalViewHolder.getAdapterPosition(), new RadioButtonStates(true, checkedId, universalViewHolder.getAdapterPosition()));
                    //log statements which check if values were changed. Always returns false"
                    Log.i("* ButtonState boolean", "" + buttonStates.get(universalViewHolder.getAdapterPosition()).getSetChecked());
                    Log.i("* ButtonState id", "" + buttonStates.get(universalViewHolder.getAdapterPosition()).getCheckedId());
                    Log.i("* ButtonState position", "" +buttonStates.get(universalViewHolder.getAdapterPosition()).getAdapterPosition());

                    Toast.makeText(mContext, "INCORRECT", Toast.LENGTH_SHORT).show();

                }
            }

        }
    });


}

@Override
public int getItemCount() {

    return wordList.size();
}


}

公共类WordQuestionAdapter扩展了RecyclerView.Adapter{
语境；
随机=新随机（）；
ArrayList wordList=新建ArrayList（）；
//存储按钮状态的arraylist
private static ArrayList buttonStates=new ArrayList（）；
//universalViewHolder对象允许从onBindViewholder获取holder的实例，以便使用可用的方法。
视窗夹持器；
私人放射组放射组；
公共WordQuestionAdapter（上下文上下文，ArrayList wordMapsArrayList）{
this.mContext=上下文；
this.wordList=wordMapsArrayList；
}
公共静态类ViewHolder扩展了RecyclerView.ViewHolder{
公共卡视图卡视图；
公共单选按钮，表示_1，表示_2，表示_3，表示_4；
公共放射组放射组；
公共视图持有人（CardView视图）{
超级（视图）；
cardView=视图；
含义_1=（单选按钮）cardView.findViewById（R.id.means_1）；
意思是_2=（单选按钮）cardView.findViewById（R.id.means_2）；
意思是_3=（单选按钮）cardView.findViewById（R.id.means_3）；
意思是_4=（单选按钮）cardwiew.findviewbyd（R.id.means_4）；
radioGroup=（radioGroup）cardView.findViewById（R.id.radio\u组）；
}
}
@凌驾
public WordQuestionAdapter.ViewHolder onCreateViewHolder（视图组父级，int-viewType）{
CardView cV=（CardView）LayoutFlater.from（parent.getContext（））。充气（R.layout.CardView，parent，false）；
放射组=（放射组）cV.findViewById（R.id.radio_组）；
//存储虚拟值以处理NPE的for循环
对于（int i=0；i问题在于，
universalViewHolder
只保存了最后一个holder引用，而没有实时访问holder。因此，当我想更改
按钮states
arraylist中的数据时，我遇到了一个大问题，因为它不会更改单击位置的值，而是更改最后一个对h的引用在
onBindViewHolder
中较旧。通过将选中的
onradiobutton
更改为接受
holder
的直接引用（通过接受两个参数调用），我可以直接访问适配器位置