Android 滚动时，RecyclerView值变为空，有些值更改为旧值

我已经创建了OrderItemRecyclerAdapter。在Editetext中输入值后，当我滚动它时，值变为空表示它将替换为第一个值。

public class OrderItemRecyclerAdapter extends RecyclerView.Adapter<OrderItemRecyclerAdapter.ViewHolder> {
    TextView orderAmountTxt, orderItemsTxt;
    Context myContext;
    ArrayList<ItemsGetterSetter> itemArrayList;
    ArrayList<Integer> itemAmountArray;
    ArrayList<Boolean> itemAvailableArray;
    TextView orderSaveTxtBtn;

    public OrderItemRecyclerAdapter(TextView orderAmountTxt, TextView orderItemsTxt, Context myContext, ArrayList<ItemsGetterSetter> itemArrayList, ArrayList<Integer> itemAmountArray, ArrayList<Boolean> itemAvailableArray, TextView orderSaveTxtBtn) {
        this.orderAmountTxt = orderAmountTxt;
        this.orderItemsTxt = orderItemsTxt;
        this.myContext = myContext;
        this.itemArrayList = itemArrayList;
        this.itemAmountArray = itemAmountArray;
        this.itemAvailableArray = itemAvailableArray;
        this.orderSaveTxtBtn = orderSaveTxtBtn;
    }



    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(myContext).inflate(R.layout.itemview_list, parent, false);
        final OrderItemRecyclerAdapter.ViewHolder vHolder = new ViewHolder(view);


        return vHolder;

    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.setIsRecyclable(false);
        itemAvailableArray.add(position, itemArrayList.get(position).isItemAvailable());
        itemAmountArray.add(position, itemArrayList.get(position).getAmount());
        holder.itemNameTxt.setText(itemArrayList.get(position).getItemName());
        holder.isAvailableSwitch.setChecked(itemArrayList.get(position).isItemAvailable());
        holder.itemAmountEditTxt.setText(String.valueOf(itemArrayList.get(position).getAmount()));

    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getItemCount() {
        return itemArrayList.size();
    }

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        TextView itemNameTxt;
        EditText itemAmountEditTxt;
        Switch isAvailableSwitch;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            itemNameTxt = itemView.findViewById(R.id.itemNameTxt);
            itemAmountEditTxt = itemView.findViewById(R.id.itemAmountEditTxt);
            isAvailableSwitch = itemView.findViewById(R.id.isAvailableSwitch);
        }
    }
}

我已粘贴了全部适配器代码。我找不到错误。谁都能解决它。

public class OrderItemRecyclerAdapter extends RecyclerView.Adapter<OrderItemRecyclerAdapter.ViewHolder> {
    TextView orderAmountTxt, orderItemsTxt;
    Context myContext;
    ArrayList<ItemsGetterSetter> itemArrayList;
    ArrayList<Integer> itemAmountArray;
    ArrayList<Boolean> itemAvailableArray;
    TextView orderSaveTxtBtn;

    public OrderItemRecyclerAdapter(TextView orderAmountTxt, TextView orderItemsTxt, Context myContext, ArrayList<ItemsGetterSetter> itemArrayList, ArrayList<Integer> itemAmountArray, ArrayList<Boolean> itemAvailableArray, TextView orderSaveTxtBtn) {
        this.orderAmountTxt = orderAmountTxt;
        this.orderItemsTxt = orderItemsTxt;
        this.myContext = myContext;
        this.itemArrayList = itemArrayList;
        this.itemAmountArray = itemAmountArray;
        this.itemAvailableArray = itemAvailableArray;
        this.orderSaveTxtBtn = orderSaveTxtBtn;
    }



    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(myContext).inflate(R.layout.itemview_list, parent, false);
        final OrderItemRecyclerAdapter.ViewHolder vHolder = new ViewHolder(view);


        return vHolder;

    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.setIsRecyclable(false);
        itemAvailableArray.add(position, itemArrayList.get(position).isItemAvailable());
        itemAmountArray.add(position, itemArrayList.get(position).getAmount());
        holder.itemNameTxt.setText(itemArrayList.get(position).getItemName());
        holder.isAvailableSwitch.setChecked(itemArrayList.get(position).isItemAvailable());
        holder.itemAmountEditTxt.setText(String.valueOf(itemArrayList.get(position).getAmount()));

    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getItemCount() {
        return itemArrayList.size();
    }

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        TextView itemNameTxt;
        EditText itemAmountEditTxt;
        Switch isAvailableSwitch;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            itemNameTxt = itemView.findViewById(R.id.itemNameTxt);
            itemAmountEditTxt = itemView.findViewById(R.id.itemAmountEditTxt);
            isAvailableSwitch = itemView.findViewById(R.id.isAvailableSwitch);
        }
    }
}

公共类OrderItemRecyclerAdapter扩展了RecyclerView.Adapter{ TextView orderAmountTxt、orderItemsTxt； 语境； ArrayList项目ArrayList； ArrayList itemAmountArray； ArrayList itemAvailableArray； TextView orderSaveTxtBtn； public OrderItemRecyclerAdapter（TextView orderAmountTxt、TextView orderItemsTxt、Context myContext、ArrayList itemArrayList、ArrayList itemAmountArray、ArrayList itemAvailableArray、TextView orderSaveTxtBtn）{ this.orderAmountTxt=orderAmountTxt； this.orderItemsTxt=orderItemsTxt； this.myContext=myContext； this.itemArrayList=itemArrayList； this.itemAmountArray=itemAmountArray； this.itemAvailableArray=itemAvailableArray； this.orderSaveTxtBtn=orderSaveTxtBtn； } @非空 @凌驾 public ViewHolder onCreateViewHolder（@NonNull ViewGroup parent，int viewType）{ 视图=LayoutFlater.from（myContext）.充气（R.layout.itemview\u列表，父项，false）； final OrderItemRecyclerAdapter.ViewHolder vHolder=新的ViewHolder（视图）； 返回vHolder； } @凌驾 public void onBindViewHolder（@NonNull ViewHolder，int位置）{ holder.setIsRecyclable（假）； itemAvailableArray.add（位置，itemArrayList.get（位置）.isItemAvailable（））； add（position，itemArrayList.get（position.getAmount（））； holder.itemNameTxt.setText（itemArrayList.get（position.getItemName（））； holder.isAvailableSwitch.setChecked（itemArrayList.get（position.isItemAvailable（））； holder.itemAmountEditTxt.setText（String.valueOf（itemArrayList.get（position.getAmount（）））； } @凌驾 公共长getItemId（int位置）{ 返回位置； } @凌驾 public int getItemCount（）{ 返回itemArrayList.size（）； } @凌驾 public int getItemViewType（int位置）{ 返回位置； } 公共静态类ViewHolder扩展了RecyclerView.ViewHolder{ TextView itemNameTxt； EditText itemAmountEditTxt； 开关是可用的开关； 公共视图持有者（@NonNull View itemView）{ 超级（项目视图）； itemNameTxt=itemView.findViewById（R.id.itemNameTxt）； itemAmountEditTxt=itemView.findViewById（R.id.itemAmountEditTxt）； isAvailableSwitch=itemView.findViewById（R.id.isAvailableSwitch）； } } }

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请查看此代码。

尝试使用holder.getAdapterPosition获取位置

public class OrderItemRecyclerAdapter extends RecyclerView.Adapter<OrderItemRecyclerAdapter.ViewHolder> {
    TextView orderAmountTxt, orderItemsTxt;
    Context myContext;
    ArrayList<ItemsGetterSetter> itemArrayList;
    ArrayList<Integer> itemAmountArray;
    ArrayList<Boolean> itemAvailableArray;
    TextView orderSaveTxtBtn;

    public OrderItemRecyclerAdapter(TextView orderAmountTxt, TextView orderItemsTxt, Context myContext, ArrayList<ItemsGetterSetter> itemArrayList, ArrayList<Integer> itemAmountArray, ArrayList<Boolean> itemAvailableArray, TextView orderSaveTxtBtn) {
        this.orderAmountTxt = orderAmountTxt;
        this.orderItemsTxt = orderItemsTxt;
        this.myContext = myContext;
        this.itemArrayList = itemArrayList;
        this.itemAmountArray = itemAmountArray;
        this.itemAvailableArray = itemAvailableArray;
        this.orderSaveTxtBtn = orderSaveTxtBtn;
    }



    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(myContext).inflate(R.layout.itemview_list, parent, false);
        final OrderItemRecyclerAdapter.ViewHolder vHolder = new ViewHolder(view);


        return vHolder;

    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.setIsRecyclable(false);
        itemAvailableArray.add(position, itemArrayList.get(position).isItemAvailable());
        itemAmountArray.add(position, itemArrayList.get(position).getAmount());
        holder.itemNameTxt.setText(itemArrayList.get(position).getItemName());
        holder.isAvailableSwitch.setChecked(itemArrayList.get(position).isItemAvailable());
        holder.itemAmountEditTxt.setText(String.valueOf(itemArrayList.get(position).getAmount()));

    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getItemCount() {
        return itemArrayList.size();
    }

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        TextView itemNameTxt;
        EditText itemAmountEditTxt;
        Switch isAvailableSwitch;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            itemNameTxt = itemView.findViewById(R.id.itemNameTxt);
            itemAmountEditTxt = itemView.findViewById(R.id.itemAmountEditTxt);
            isAvailableSwitch = itemView.findViewById(R.id.isAvailableSwitch);
        }
    }
}

        @Override
        public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
            holder.setIsRecyclable(false);
            ItemsGetterSetter item = itemArrayList.get(holder.getAdapterPosition())
    
            itemAvailableArray.add(holder.getAdapterPosition(), item.isItemAvailable());
            itemAmountArray.add(holder.getAdapterPosition(), item.getAmount());
            holder.itemNameTxt.setText(item.getItemName());
            holder.isAvailableSwitch.setChecked(item.isItemAvailable());
            holder.itemAmountEditTxt.setText(String.valueOf(item.getAmount()));
    
        }

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按照您的建议修改代码后，当我滚动视图时，仍会反映起始值。