自定义警报对话框搜索项目结果错误

Question

我正在创建一个 Android 应用程序。它有一些带有搜索栏的弹出对话框。但问题是：当我使用它搜索某些产品时，该搜索的匹配项应该添加到弹出对话框内的列表视图中，这很好用。

但是当我选择项目时，弹出对话框中的搜索项目应该保存在我之前创建的对象 (OrderView object) 中，但是该对象内的存储项目总是错误 （仅当我搜索项目时才会发生这种情况）。问题出在这行代码，

public void onItemClick(AdapterView<?> arg0, View arg1,int position, long arg3)

因为我得到 postion 来识别所选项目。

但我不知道如何将此代码行替换为正确的方式。我真的很感谢你的帮助。谢谢你。

这是我的代码：

final List<Product> products_data = dbHelper.productListView();
    if (products_data.size() > 0) {

        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
        builder.setTitle("Select A Product");
        //insert array to constructor
        LayoutInflater inflater = getActivity().getLayoutInflater();
        View dialogLayout = inflater.inflate(R.layout.product_list_pop_up, null);
        final ProdductPopupAdapter testAdapter = new ProdductPopupAdapter(getContext(), products_data);
        final ListView listView = dialogLayout.findViewById(R.id.product_list_view);
        TextView cancel_btn = dialogLayout.findViewById(R.id.cancel_btn);
        final EditText search_view = dialogLayout.findViewById(R.id.list_item_search);
        listView.setAdapter(testAdapter);

        search_view.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) {

                final ProdductPopupAdapter testAdapter = new ProdductPopupAdapter(getContext(),dbHelper.searchProductList(search_view.getText().toString()));
                listView.setAdapter(testAdapter);
                testAdapter.notifyDataSetChanged();

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

        builder.setView(dialogLayout);

        final AlertDialog alert = builder.create();
        alert.show();

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1,int position, long arg3)
            {
                OrderView orderView = new OrderView();
                orderView.setProduct_name(products_data.get(position).getProductName());
                orderView.setProduct_qty(0);
                orderView.setProduct_price(products_data.get(position).getPrice());
                orderView.setNewItemtotal(Double.parseDouble(products_data.get(position).getPrice()));
                orderView.setTotalPrice(products_data.get(position).getPrice());
                orderView.setProduct_id(Integer.parseInt(products_data.get(position).getProductID()));
                myItems.add(orderView);

                calculatePrice(myItems);

                binding.itemList.setAdapter(newOrderListAdaptor);
                newOrderListAdaptor.notifyDataSetChanged();

                alert.dismiss();
            }

        });  
    } 

Answer 1

好的。问题是products_data 列表在您搜索项目时未更新。但是您正在尝试创建项目表单而不是更新 products_data 列表。 这里

OrderView orderView = new OrderView();
orderView.setProduct_name(products_data.get(position).getProductName());
orderView.setProduct_qty(0);
orderView.setProduct_price(products_data.get(position).getPrice());
orderView.setNewItemtotal(Double.parseDouble(products_data.get(position).getPrice()));
orderView.setTotalPrice(products_data.get(position).getPrice());
orderView.setProduct_id(Integer.parseInt(products_data.get(position).getProductID()));
myItems.add(orderView);

如果你能把你的List<Product> products_data = dbHelper.productListView(); 在您的班级内，然后在搜索项目时尝试更新它。希望这会有所帮助。

这里是示例：

products_data = dbHelper.productListView();
    final ListView listView;
        if (products_data.size() > 0) {

            AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
            //insert array to constructor
            LayoutInflater inflater = getActivity().getLayoutInflater();
            View dialogLayout = inflater.inflate(R.layout.product_list_pop_up, null);
            testAdapter = new ProdductPopupAdapter(getContext(), products_data);
            listView = dialogLayout.findViewById(R.id.product_list_view);
            TextView cancel_btn = dialogLayout.findViewById(R.id.cancel_btn);
            final EditText search_view = dialogLayout.findViewById(R.id.list_item_search);
            listView.setAdapter(testAdapter);

            search_view.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) {
                    products_data = dbHelper.searchProductList(s.toString());
                    testAdapter = new ProdductPopupAdapter(getContext(), products_data);
                    listView.setAdapter(testAdapter);
                    testAdapter.notifyDataSetChanged();

                }

                @Override
                public void afterTextChanged(Editable s) {

                }
            });

        builder.setView(dialogLayout);

Answer 2

您是否尝试将 onItemClick 功能添加到适配器？

例子：

view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //your code here
            }
        });