列表视图中的评级栏评级会重置

Question

Senario：获取多个产品的评分反馈。

问题：评分栏值通过调用 setOnRatingBarChangeListener

重置滚动列表视图

预期输出：

自定义listview adpater代码：

public class FeedbackAdapter extends BaseAdapter {

    static Context context;
    List<FeedbackRowDetails> row;
    ViewHolder holder;
    public FeedbackAdapter(Context context,List<FeedbackRowDetails> row)
    {
        this.context = context;
        this.row =row;
    }

    private class ViewHolder {
        TextView tv_slno, tv_productname, tv_time;
        RatingBar rb_productrating;

    }

    @Override
    public View getView( final int position, View convertView, ViewGroup parent) {

        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

        if (convertView == null) 
        {

            convertView = mInflater.inflate(R.layout.custom_feedback_row_format,null);
            holder = new ViewHolder();
            holder.tv_slno = (TextView) convertView.findViewById(R.id.tv_slno);
            holder.tv_time = (TextView) convertView.findViewById(R.id.tv_time);
            holder.tv_productname = (TextView) convertView.findViewById(R.id.tv_productname);
            holder.rb_productrating=(RatingBar) convertView.findViewById(R.id.rb_productrating);
            convertView.setTag(holder);

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

        FeedbackRowDetails row_pos = row.get(position);

        holder.tv_slno.setText(String.valueOf(position + 1));
        holder.tv_time.setText(row_pos.gettime());
        holder.tv_productname.setText(row_pos.getproductsName());
        holder.rb_productrating.setRating(Float.valueOf(row_pos.getrating()));

        holder.rb_productrating.setOnRatingBarChangeListener(new OnRatingBarChangeListener() 
        {
            public void onRatingChanged(RatingBar ratingBar, float rating,boolean fromUser) 
            {
                FeedbackRowDetails row_pos = row.get(position);
                int roundoff_rating = (int)Math.round(rating);
                ratingBar.setRating(roundoff_rating);
                row_pos.setrating(String.valueOf(roundoff_rating));

            }
        });

        return convertView;

    }

    @Override
    public int getCount() {
        return row.size();
    }

    @Override
    public Object getItem(int position) {
        return row.get(position);
    }

    @Override
    public long getItemId(int position) {
        return row.indexOf(getItem(position));
    }

}

Answer 1

只需将您的代码包含在onRatingChanged方法中，使用简单的if，如下所示

if(fromUser) {
                FeedbackRowDetails row_pos = row.get(position);
                int roundoff_rating = (int) Math.round(rating);
                ratingBar.setRating(roundoff_rating);
                row_pos.setRating(String.valueOf(roundoff_rating));
            }

已经使用模拟器对其进行了测试，并且按预期工作。希望这能解决您的问题

Answer 2

参考link

解决了这个问题

  public class FeedbackAdapter extends BaseAdapter {

        static Context context;
        List<FeedbackRowDetails> row;
        ViewHolder holder;
        public FeedbackAdapter(Context context,List<FeedbackRowDetails> row)
        {
            this.context = context;
            this.row =row;
        }

        private class ViewHolder {
            TextView tv_slno, tv_productname, tv_time;
            RatingBar rb_productrating;

        }

        @Override
        public View getView( final int position, View convertView, ViewGroup parent) {

            LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

            if (convertView == null) 
            {

                convertView = mInflater.inflate(R.layout.custom_feedback_row_format,parent, false);
                holder = new ViewHolder();
                holder.tv_slno = (TextView) convertView.findViewById(R.id.tv_slno);
                holder.tv_time = (TextView) convertView.findViewById(R.id.tv_time);
                holder.tv_productname = (TextView) convertView.findViewById(R.id.tv_productname);
                holder.rb_productrating=(RatingBar) convertView.findViewById(R.id.rb_productrating);
                convertView.setTag(holder);

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

            holder.rb_productrating.setOnRatingBarChangeListener(onRatingChangedListener(holder, position));
            holder.rb_productrating.setTag(position);

            holder.tv_slno.setText(String.valueOf(position + 1));
            holder.tv_time.setText(getItem(position).gettime());

            holder.tv_productname.setText(getItem(position).getproductsName());
            float rating=Float.valueOf(getItem(position).getrating());

            holder.rb_productrating.setRating(rating);

            return convertView;

        }

          private RatingBar.OnRatingBarChangeListener onRatingChangedListener(final ViewHolder holder, final int position) 
          {
                return new RatingBar.OnRatingBarChangeListener() {
                    @Override
                    public void onRatingChanged(RatingBar ratingBar, float rating, boolean b) 
                    {

                        FeedbackRowDetails item = row.get(position);
                        int roundoff_rating = (int)Math.round(rating);                  
                        ratingBar.setRating(roundoff_rating);
                        item.setrating(String.valueOf(roundoff_rating));

                    }
                };
            }
        @Override
        public int getCount() {
            return row.size();
        }

        @Override
        public FeedbackRowDetails getItem(int position) 
        {
            return row.get(position);
        }

        @Override
        public long getItemId(int position) {
            return row.indexOf(getItem(position));
        }

    }