Question

//********* base adapter *****

Listview里面按钮点击设置TextView里面的值，但文本视图重复值返回，当我滚动TextView位置更改时，我已经附加了我的基本适配器代码，请帮助解决。

package com.example.test;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;



public class listadapter extends BaseAdapter{

    Context context;

    ArrayList<Listdata> listitem;



    public  listadapter(Context context, ArrayList<Listdata> listitem) {
            this.context = context;
            this.listitem = listitem;
        }

        /*private view holder class*/
        public class ViewHolder {

            TextView itemname;

            TextView itemrate;

            TextView itemcount;

            TextView itemtotal;


            Button add;

            Button sub;


        }



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

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

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return listitem.indexOf(getItem(position));
    }

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

         final ViewHolder holder ;

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


            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.listitem, null);
                holder = new ViewHolder();

            holder.itemname=(TextView)convertView.findViewById(R.id.itemname);

            holder.itemrate=(TextView)convertView.findViewById(R.id.itemrate);

            holder.itemcount=(TextView)convertView.findViewById(R.id.count);

            holder.itemtotal=(TextView)convertView.findViewById(R.id.total);

            holder.add=(Button)convertView.findViewById(R.id.add);

            holder.sub=(Button)convertView.findViewById(R.id.minus);

            convertView.setTag(holder);

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


            Listdata ld=(Listdata) getItem(position);

            holder.itemname.setText(ld.getItemname());

            int a=ld.getItemrate();

            holder.itemrate.setText(Integer.toString(a));

            holder.add.setOnClickListener(new OnClickListener() {

                @Override

                public void onClick(View v) {


                       Listdata ld=listitem.get(position);

                       ld.itemcount++;


                       holder.itemcount.setText(String.valueOf(ld.itemcount));

                }
            });



            holder.sub.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {



                }
            });



        return convertView;
    }

}

Answer 1

解决问题覆盖此方法

@Override
  public int getViewTypeCount() {

   return getCount();
  }

  @Override
  public int getItemViewType(int position) {

   return position;
  }

滚动列表视图列表视图位置更改内的文本视图项和列表视图项也返回重复项

1 个答案: