Android Listview onclick 随机选择

Question

我有 FAQ 作为 ListView ，它将包含一个问题、一个答案和一个 ImageView 。我附上下面的屏幕截图。当单击第一个项目时，第一行的答案将可见(最初visibility gone) 。问题是它也会使第十项可见。同样的情况发生到第四项

       @Override
public View getView(final int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        holder = new ViewHolder();
        convertView = inflater.inflate(R.layout.faq_listitem, parent,false);

        holder.mQuestionnoTextView= convertView.findViewById(R.id.question_no);
        holder.mQuestionTextView =  convertView.findViewById(R.id.question);
        holder.mAnswerTextView =  convertView.findViewById(R.id.answer);
        holder.viewMore=convertView.findViewById(R.id.show_more) ;

        convertView.setTag(holder);
    } else
        holder = (ViewHolder) convertView.getTag();

    int number=position+1;

    holder.mQuestionnoTextView.setText(MessageFormat.format("{0})", number));
    holder.mQuestionTextView.setText(MessageFormat.format("{0}", getItem(position).getQuestion()));
    holder.mAnswerTextView.setText(getItem(position).getAnswer());
    final TextView answers=holder.mAnswerTextView;
    final ImageView arrow=holder.viewMore;

    convertView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

                if (answers.isShown()) {
                    answers.setVisibility(View.GONE);
                    arrow.setRotation(0);
                } else {
                    answers.setVisibility(View.VISIBLE);
                    arrow.setRotation(180);
                }
                //mAdapter.notifyDataSetChanged();

            }

    });

    return convertView;
}

Answer 1

所以这就是您需要做的。

创建一个全局变量List<Integer> savedPositions = new ArrayList<>();

if(savedPositions.contains(position)){
        answers.setVisibility(View.VISIBLE);
        arrow.setRotation(180);
 }else{
      answers.setVisibility(View.GONE);
      arrow.setRotation(0);
  }

 convertView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

                if (savedPositions.contains(position)) {
                    savedPositions.remove((Integer) position);
                    answers.setVisibility(View.GONE);
                    arrow.setRotation(0);

                } else {
                    savedPositions.add(position);
                    answers.setVisibility(View.VISIBLE);
                    arrow.setRotation(180);
                }
               notifyDataSetChanged();

            }

    });