Double items in recyclerview

[Khadie Paliza]

I have list and I filtered it using this code :

            var data = SampleData.SampleDataItems();
            List<SampleData> filteredSavings = data.Where(item => item.AccountCode.Equals("Savings")).ToList();
                listDataChild.Add(listDataHeader[0], filteredSavings);
                List<SampleData> filteredLoans = data.Where(item => item.AccountCode.Equals("Loans")).ToList();
                listDataChild.Add(listDataHeader[1], filteredLoans);

The data pass properly but in recyclerView the items are repeating:

 

[Deleted User]

Can you please provide more information as to what the problem is? Like, post a bigger picture, give a background of what language you are using as it seems to be like C#.

It's Kotlin. But yes, not enough information given to answer the question, and the code fragment is too small.

 

[Khadie Paliza]

It's Kotlin. But yes, not enough information given to answer the question, and the code fragment is too small.

Hi sorry for late reply. It's Xamarin.Android.

OnCreateView in my fragment

 listDataHeader = new List<ExpandedMenuModel>();
            listDataChild = new Dictionary<ExpandedMenuModel, List<SampleData>>();

            ExpandedMenuModel item1 = new ExpandedMenuModel();
            item1.Title = "Savings";
            listDataHeader.Add(item1);

            ExpandedMenuModel item2 = new ExpandedMenuModel();
            item2.Title = "Expenses";
            listDataHeader.Add(item2);

listDataChild.Add(listDataHeader[0], SampleData.FilteredDataSavings());
            listDataChild.Add(listDataHeader[1], SampleData.FilteredDataExpenses());
menuAdapter = new SampleAccountExpandable(this.Activity, listDataHeader, listDataChild, expandableMyAccount);
            expandableMyAccount.SetAdapter(menuAdapter);
            expandableMyAccount.ExpandGroup(0);
            expandableMyAccount.GroupClick += ExpandableMyAccount_GroupClick;

My BaseExpandableListAdapter

 public SampleAccountExpandable(Activity context, List<ExpandedMenuModel> listDataHeader, Dictionary<ExpandedMenuModel, List<SampleData>> listChildData, ExpandableListView mView)
        {
            _context = context;
            _listDataHeader = listDataHeader;
            _listDataChild = listChildData;
            expandList = mView;
        }
public override int GroupCount
        {
            get
            {
                return _listDataHeader.Count;
            }
        }

        public override bool HasStableIds
        {
            get
            {
                return true;
            }
        }

        public override Java.Lang.Object GetChild(int groupPosition, int childPosition)
        {
            throw new NotImplementedException();
        }


        protected List<SampleData> GetSampleData(int groupPosition, int childPosition)
        {
            var sampleData = _listDataChild[_listDataHeader[groupPosition]];
            return sampleData;
        }
  public override long GetChildId(int groupPosition, int childPosition)
        {
            return childPosition;
        }

        public override int GetChildrenCount(int groupPosition)
        {
            return _listDataChild[_listDataHeader[groupPosition]].Count();
        }
public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent)
        {
             childValue = GetSampleData(groupPosition, childPosition);
            View view = convertView;
            if (view == null)
            {
                //convertView = _context.LayoutInflater.Inflate(Resource.Layout.list_expanda_child, parent, false);
                view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.list_expanda_child, parent, false);
            }

             recyclerView = (RecyclerView)view.FindViewById(Resource.Id.recyclerViewAccount);

            accountLayoutManager = new LinearLayoutManager(_context);
            recyclerView.SetLayoutManager(accountLayoutManager);
            accountRecycler = new SampleAccountRecycler(childValue);
            accountRecycler.ItemClick += OnItemClick;
            recyclerView.SetAdapter(accountRecycler);

            return view;
        }
  public override Java.Lang.Object GetGroup(int groupPosition)
        {
            return new JavaObjectWrapper<ExpandedMenuModel>() { Obj = _listDataHeader[groupPosition] };
        }

        public override long GetGroupId(int groupPosition)
        {
            return groupPosition;
        }

        public override View GetGroupView(int groupPosition, bool isExpanded, View convertView, ViewGroup parent)
        {
            ExpandedMenuModel headerTitle = _listDataHeader[groupPosition];
            if (convertView == null)
            {
                convertView = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.list_expanda_header, parent, false);
            }
            //convertView = convertView ?? _context.LayoutInflater.Inflate(Resource.Layout.list_expanda_header, parent, false);
            TextView lblTitle = (TextView)convertView.FindViewById(Resource.Id.listHeader);
            lblTitle.Text = headerTitle.Title;
         
            return convertView;
        }

        public override bool IsChildSelectable(int groupPosition, int childPosition)
        {
            return true;
        }


        public class JavaObjectWrapper<T> : Java.Lang.Object
        {
            public T Obj { get; set; }
        }

My RecyclerAdapter

public SampleAccountRecycler(List<SampleData> accounts)
        {
            account = new List<SampleData>();
            this.account = accounts;
        }
        public override int ItemCount
        {
            get
            {
                return account.Count();
            }
        }


        public override long GetItemId(int position)
        {
            return position;
        }

        public override int GetItemViewType(int position)
        {
            return position;
        }
public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            AccountViewHolder viewHolder = holder as AccountViewHolder;

            viewHolder.txtTypeAccount.Text = account[position].Type;
            viewHolder.txtAccountNumber.Text = account[position].Number;
            viewHolder.txtAccountAmount.Text = account[position].Amount;
         
        }
  public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            View view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.RecylerModelAccount, parent, false);
            AccountViewHolder viewHolder = new AccountViewHolder(view, OnClick);
            return viewHolder;
        }
        internal class AccountViewHolder : RecyclerView.ViewHolder
        {
            public TextView txtTypeAccount;
            public TextView txtAccountNumber;
            public TextView txtAccountAmount;
            public AccountViewHolder(View itemView, Action<int> listener) : base(itemView)
            {
                txtTypeAccount = itemView.FindViewById<TextView>(Resource.Id.txtTypeAccount);
                txtAccountNumber = itemView.FindViewById<TextView>(Resource.Id.txtAccountNumber);
                txtAccountAmount = itemView.FindViewById<TextView>(Resource.Id.txtAccountAmount);

                itemView.Click += (sender, e) => listener(base.LayoutPosition);
            }
        }

        void OnClick(int position)
        {
            if (ItemClick != null)
                ItemClick(this, position);
        }