Question

如何解决这个问题？

措施：

    List<Map<String, Object>> measures(BuildContext context) {
  return[
    {"label": S.of(context).distanceTranslate, "icon": "assets/icons/ruler2.png"},
    {"label": S.of(context).distanceTranslate, "icon": "assets/icons/temp2.png"},
    {"label": S.of(context).distanceTranslate, "icon": "assets/icons/paid4.png"},
    {"label": S.of(context).distanceTranslate, "icon": "assets/icons/time2.png"},
    {"label": S.of(context).distanceTranslate, "icon": "assets/icons/binary2.png"},
  ];
}

请帮忙。

Answer 1

public class NewOrderAdapter extends RecyclerView.Adapter<NewOrderAdapter.ViewHolder> { private ArrayList<NewOrderModel> newOrderList; //Main Arraylist private ArrayList<CheckoutDialogModel> checkoutList; //Arraylist to be made Context mContext; String itemCode, casesEtVal, bottlesEtVal; String[] arrCases, arrBottles; //Array for getting edittext values ArrayList<String> skuArray = new ArrayList<>(); //textview array ArrayList<String> casesArray = new ArrayList<>(); //Edittext1 array ArrayList<String> bottlesArray = new ArrayList<>(); //Edittext2 array boolean isOnTextChanged = false; int id; public NewOrderAdapter(ArrayList<NewOrderModel> newOrderList, Context context) { this.newOrderList = newOrderList; this.mContext = context; arrCases = new String[newOrderList.size()]; arrBottles = new String[newOrderList.size()]; } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View v = LayoutInflater.from(mContext).inflate(R.layout.new_order_recycler_item, parent, false); return new ViewHolder(v); } @Override public void onBindViewHolder(@NonNull ViewHolder holder, int position) { NewOrderModel model = newOrderList.get(position); holder.txtModelName.setText(model.getItemCode()); id = model.getId(); holder.edtPrice1.setTag(position); holder.edtPrice1.setText(newOrderList.get(position).getCasesPrice()); holder.edtPrice2.setTag(position); holder.edtPrice2.setText(newOrderList.get(position).getUnitsPrice()); holder.edtPrice2.setOnClickListener(v -> { final Snackbar snackbar = Snackbar.make(v, "",Snackbar.LENGTH_INDEFINITE); View view = LayoutInflater.from(mContext).inflate(R.layout.new_order_snack, null); snackbar.getView().setBackgroundColor(Color.TRANSPARENT); Snackbar.SnackbarLayout snackbarLayout = (Snackbar.SnackbarLayout)snackbar.getView(); snackbarLayout.setPadding(0,0,0,0); Button btnCheckout = view.findViewById(R.id.btnCheckOut); //Checkout button btnCheckout.setOnClickListener(v12 -> { ArrayList<String> fSKUarray = new ArrayList<>(); ArrayList<String> fCasesArray = new ArrayList<>(); ArrayList<String> fBottlesArray = new ArrayList<>(); if (!casesArray.isEmpty() && !bottlesArray.isEmpty()) { for (int i = 0; i< casesArray.size(); i++) { if (!casesArray.get(i).equals("0") && !casesArray.get(i).equals("")){ fCasesArray.add(casesArray.get(i)); fSKUarray.add(skuArray.get(i)); } } for (int i = 0; i<bottlesArray.size(); i++) { if (!bottlesArray.get(i).equals("0") && !bottlesArray.get(i).equals("")) { fBottlesArray.add(bottlesArray.get(i)); } } } AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext()); View view1 = LayoutInflater.from(mContext).inflate(R.layout.checkout_dialog, null); RecyclerView orderRecycler = view1.findViewById(R.id.orderRecycler); orderRecycler.setHasFixedSize(true); orderRecycler.setLayoutManager(new LinearLayoutManager(view1.getContext())); orderRecycler.addItemDecoration(new DividerItemDecoration(view1.getContext(), LinearLayoutManager.VERTICAL)); checkoutList = new ArrayList<CheckoutDialogModel>(){ { for (int i = 0; i < newOrderList.size(); i++){ if (casesEtVal != null && bottlesEtVal != null){ String sku = newOrderList.get(i).getItemCode(); switch (newOrderList.get(i).getGroupCode()) { case "114": add(new CheckoutDialogModel("BEER", "", "", "")); add(new CheckoutDialogModel("", "", sku, newOrderList.get(i).getCasesPrice() + "."+ newOrderList.get(i).getUnitsPrice())); break; case "115": add(new CheckoutDialogModel("LIQUOR", "", "", "")); add(new CheckoutDialogModel("", "", sku, newOrderList.get(i).getCasesPrice() + "."+ newOrderList.get(i).getUnitsPrice())); break; case "109": add(new CheckoutDialogModel("WINE", "", "", "")); add(new CheckoutDialogModel("", "", sku, newOrderList.get(i).getCasesPrice() + "."+ newOrderList.get(i).getUnitsPrice())); break; } } } } }; checkoutList = getCheckoutList(); CheckoutDialogAdapter mAdapter = new CheckoutDialogAdapter(); mAdapter.setCheckOutList(checkoutList); orderRecycler.setAdapter(mAdapter); snackbar.dismiss(); builder.setView(view1); final AlertDialog dialog = builder.create(); Button btnPlaceOrdr = view1.findViewById(R.id.btnPlaceOrdr); btnPlaceOrdr.setOnClickListener(v13 -> { dialog.dismiss(); }); dialog.show(); }); snackbarLayout.addView(view, 0); snackbar.show(); }); } public ArrayList<CheckoutDialogModel> getCheckoutList() { return checkoutList; } @Override public int getItemCount() { return newOrderList.size(); } public class ViewHolder extends RecyclerView.ViewHolder { private TextView txtModelName; private EditText edtPrice1, edtPrice2; public ViewHolder(@NonNull View itemView) { super(itemView); txtModelName = itemView.findViewById(R.id.modelName); edtPrice1 = itemView.findViewById(R.id.price1); edtPrice2 = itemView.findViewById(R.id.price2); edtPrice1.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { if (edtPrice1.getTag()!= null) { newOrderList.get(getAdapterPosition()).setCasesPrice(edtPrice1.getText().toString()); } } @Override public void afterTextChanged(Editable s) { if (isOnTextChanged) { isOnTextChanged = false; try { for (int i = 0; i<= id; i++) { if (i!=id){ skuArray.add("0"); casesArray.add("0"); } else { skuArray.add("0"); casesArray.add("0"); skuArray.set(id, newOrderList.get(getAdapterPosition()).getItemCode()); casesArray.set(id, casesEtVal); } } Log.d("skuList", skuArray.toString()); Log.d("casesList", casesArray.toString()); } catch (NumberFormatException e){ for (int i = 0; i<= id; i++) { if (i == id) { skuArray.set(id,"0"); casesArray.set(id,"0"); } } } } } }); edtPrice2.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { isOnTextChanged = true; if (edtPrice2.getTag()!=null) { newOrderList.get(getAdapterPosition()).setUnitsPrice(edtPrice2.getText().toString()); } } @Override public void afterTextChanged(Editable s) { if (isOnTextChanged) { isOnTextChanged = false; try { for (int i = 0; i<= id; i++) { if (i!=id){ skuArray.add("0"); casesArray.add("0"); bottlesArray.add("0"); } else { skuArray.add("0"); casesArray.add("0"); bottlesArray.add("0"); skuArray.set(id, newOrderList.get(getAdapterPosition()).getItemCode()); casesArray.set(id, casesEtVal); bottlesArray.set(id, bottlesEtVal); } } Log.d("skuList", skuArray.toString()); Log.d("casesList", casesArray.toString()); Log.d("bottlesList", bottlesArray.toString()); } catch (NumberFormatException e){ for (int i = 0; i<= id; i++) { if (i == id) { skuArray.set(id,"0"); casesArray.set(id,"0"); bottlesArray.set(id,"0"); } } } } casesEtVal = edtPrice1.getText().toString(); arrCases[getAdapterPosition()] = casesEtVal; bottlesEtVal = edtPrice2.getText().toString(); arrBottles[getAdapterPosition()] = bottlesEtVal; if (!casesEtVal.equals("") && !bottlesEtVal.equals("")) { if (Integer.parseInt(bottlesEtVal) > Integer.parseInt(casesEtVal)) { Toast.makeText(mContext, "Bottles can't be more than Cases!", Toast.LENGTH_SHORT).show(); edtPrice2.setText(newOrderList.get(getAdapterPosition()).getUnitsPrice().replace(bottlesEtVal, "")); } } } }); } } 是一个函数，它在调用时返回一个值。你需要调用它来获取它的价值。这是一个简单的解决方法：

public class CheckoutDialogAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<CheckoutDialogModel> mArrayList;
private static final int TYPE_HEADER = 1;
private static final int TYPE_ITEM = 2;

public CheckoutDialogAdapter() {}

@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View v;
    if (viewType == TYPE_HEADER){
        v = LayoutInflater.from(parent.getContext()).inflate(R.layout.checkout_dialog_header, parent, false);
        return new VHHeader(v);
    }
        v = LayoutInflater.from(parent.getContext()).inflate(R.layout.checkout_dialog_item, parent, false);
        return new VHItem(v);
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
    int viewType = getItemViewType(position);
    if (viewType == TYPE_ITEM) {
        VHItem vhItem = ((VHItem)holder);
        vhItem.itemName.setText(mArrayList.get(position).getItemName());
        vhItem.itemQty.setText(mArrayList.get(position).getItemQty());
    } else if (viewType == TYPE_HEADER) {
        VHHeader vhHeader = ((VHHeader)holder);
        vhHeader.headerName.setText(mArrayList.get(position).getHeaderName());
        vhHeader.headerQty.setText(mArrayList.get(position).getHeaderQty());
    }
}

@Override
public int getItemCount() {
    return mArrayList == null ? 0 : mArrayList.size();
}

@Override
public int getItemViewType(int position) {
    if (TextUtils.isEmpty(mArrayList.get(position).itemName)) {
        return TYPE_HEADER;
    } else {
        return TYPE_ITEM;
    }
}

public void setCheckOutList(ArrayList<CheckoutDialogModel> arrayList) {
    this.mArrayList = arrayList;
    notifyDataSetChanged();
}

public class VHHeader extends RecyclerView.ViewHolder {
    TextView headerName, headerQty;
    LinearLayout headerLayout;

    public VHHeader(@NonNull View itemView) {
        super(itemView);
        headerName = itemView.findViewById(R.id.headerName);
        headerQty = itemView.findViewById(R.id.headerQty);
        headerLayout = itemView.findViewById(R.id.headerLayout);
    }
}

public class VHItem extends RecyclerView.ViewHolder {
    TextView itemName, itemQty;
    LinearLayout itemLayout;

    public VHItem(@NonNull View itemView) {
        super(itemView);
        itemName = itemView.findViewById(R.id.itemName);
        itemQty = itemView.findViewById(R.id.itemQty);
        itemLayout = itemView.findViewById(R.id.itemLayout);
    }
}

Answer 2

measures 是一个函数，您将它用作导致问题的变量。更新您的代码如下

 items: measures(context).map(
                      (e) => BottomNavigationBarItem(
                        icon: Image.asset(e['icon']),
                        label: e['label'], 
                      ),
                    ).toList(),

方法 'map' 没有为类型 'Function' 定义

2 个答案: