ListView和RadioGroup联合使用，滑动时选项混乱。

在ListView里面使用RadioGroup，在滑动时发现选项有粘连，这是由于复用导致的，我在解决这个问题时查了一些资料，但是问题依然存在，后来发现是我的代码顺序有问题。最终顺序为：
1.先取消监听：
viewHolder.radioGroup.setOnCheckedChangeListener(null);
2.清空所有选项：
viewHolder.radioGroup.clearCheck();
3.筛选出已经选择的选项：

if(!TextUtils.isEmpty(list.get(arg0).getAnswer())){
            String answer = list.get(arg0).getAnswer();
            if(TextUtils.equals(answer,"A")){
                viewHolder.radioGroup.check(R.id.radio_a);
            }else if(TextUtils.equals(answer,"B")){
                viewHolder.radioGroup.check(R.id.radio_b);
            }else if(TextUtils.equals(answer,"C")){
                viewHolder.radioGroup.check(R.id.radio_c);
            }else if(TextUtils.equals(answer,"D")){
                viewHolder.radioGroup.check(R.id.radio_d);
            }else{
                viewHolder.radioGroup.clearCheck();
            }
        }else{
            viewHolder.radioGroup.clearCheck();
        }

4.重新添加监听；

完整代码如下：

适配器代码：

class SelectGanBuDatailAdapter extends BaseAdapter {

    private Activity context;
    private List list ;
    public SelectGanBuDatailAdapter(Activity c,List list ) {
        this.context = c;
        this.list = list;
    }


    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return this.list.size();
    }

    @Override
    public Object getItem(int arg0) {
        // TODO Auto-generated method stub
        return list.get(arg0);
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return 0;
    }


    @Override
    public View getView(int arg0, View convertView, ViewGroup arg2) {
        // TODO Auto-generated method stub  arg0  是不是postionshi
        ViewHolder viewHolder = null;
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.layout_radio_item, null);
            viewHolder = new ViewHolder();
            viewHolder.radioGroup = (RadioGroup) convertView.findViewById(R.id.radio_group);
            viewHolder.radioA = (RadioButton) convertView.findViewById(R.id.radio_a);
            viewHolder.radioB = (RadioButton) convertView.findViewById(R.id.radio_b);
            viewHolder.radioC = (RadioButton) convertView.findViewById(R.id.radio_c);
            viewHolder.radioD = (RadioButton) convertView.findViewById(R.id.radio_d);
            viewHolder.title = (TextView) convertView.findViewById(R.id.title);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        viewHolder.title.setText(list.get(arg0).getTitle());

        viewHolder.radioGroup.setOnCheckedChangeListener(null);
        viewHolder.radioGroup.clearCheck();
        if(!TextUtils.isEmpty(list.get(arg0).getAnswer())){
            String answer = list.get(arg0).getAnswer();
            if(TextUtils.equals(answer,"A")){
                viewHolder.radioGroup.check(R.id.radio_a);
            }else if(TextUtils.equals(answer,"B")){
                viewHolder.radioGroup.check(R.id.radio_b);
            }else if(TextUtils.equals(answer,"C")){
                viewHolder.radioGroup.check(R.id.radio_c);
            }else if(TextUtils.equals(answer,"D")){
                viewHolder.radioGroup.check(R.id.radio_d);
            }else{
                viewHolder.radioGroup.clearCheck();
            }
        }else{
            viewHolder.radioGroup.clearCheck();
        }
        viewHolder.radioGroup.setId(arg0);
        final RadioGroup group = viewHolder.radioGroup;
        viewHolder.radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int id) {
                int currentPos = (int) radioGroup.getId();
                int currentId = radioGroup.getId();
                System.out.print("currentId:" + currentId);
                if(radioGroup == group){
                    switch (id){
                        case R.id.radio_a:
                            list.get(currentPos).setAnswer("A");
                            break;
                        case R.id.radio_b:
                            list.get(currentPos).setAnswer("B");
                            break;
                        case R.id.radio_c:
                            list.get(currentPos).setAnswer("C");
                            break;
                        case R.id.radio_d:
                            list.get(currentPos).setAnswer("D");
                            break;
                    }
                }

            }
        });

        return convertView;
    }



    static class ViewHolder {
        private RadioGroup radioGroup;
        private RadioButton radioA;
        private RadioButton radioB;
        private RadioButton radioC;
        private RadioButton radioD;
        private TextView title;
    }
}

在Activity中使用：

  List titleList = new ArrayList<>();
        for(int i = 0 ; i < 50; i++){
            ItemBean itemBean = new ItemBean();
            itemBean.setTitle("这是第" + i + "个选项");
            titleList.add(itemBean);
        }

        SelectGanBuDatailAdapter adapter = new SelectGanBuDatailAdapter(AboutScrollActivity.this,titleList);
        listview.setAdapter(adapter);

布局：

实体类：

public class ItemBean {
    private String title;
    private String answer;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getAnswer() {
        return answer;
    }

    public void setAnswer(String answer) {
        this.answer = answer;
    }
}

至此完美解决该问题，如果谁有更好的解决方法，可以恢复哦。