Question

我的自定义模型具有以下自定义阵列适配器-

public class ColorAttributeArrayAdapter extends ArrayAdapter<ProductAttributeModel> {

    private List<ProductAttributeModel> titles;
    private Context context;
    private MarketApiCalls marketApiCalls;

    public ColorAttributeArrayAdapter(@NonNull Context context, List<ProductAttributeModel> titles) {
        super(context, R.layout.product_attribute_spinner_row_item, R.id.product_attribute_spinner_row_item_textview, titles);
        this.titles = titles;
        this.context = context;
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(BASE_PORTAL_PRODUCTION_URL)
//                .baseUrl(BASE_PORTAL_STAGE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        marketApiCalls = retrofit.create(MarketApiCalls.class);
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        View listItem = convertView;
        if (listItem == null) {
            listItem = LayoutInflater.from(context).inflate(R.layout.product_attribute_spinner_row_item, parent, false);
        }
//        String currentString = titles.get(position).getAttributeValues().get(position);
        List<String> attributeValues = titles.get(position).getAttributeValues();
        for (int i = 0; i < attributeValues.size(); i++) {
            String currentString = attributeValues.get(i);

            //Setting the image color
            ImageView imageView = listItem.findViewById(R.id.product_attribute_spinner_row_item_image_view);
            Map<String, String> htmlStandardColorMap = ColorUtil.getHtmlStandardColorMap();
            if (htmlStandardColorMap.containsKey(currentString)) {
                imageView.setBackgroundColor(Color.parseColor(htmlStandardColorMap.get(currentString)));
            } else {
                String colorURL = COLORS_API.concat(Uri.encode(currentString, "UTF-8"));
                Picasso.get().load(colorURL).resize(90,90).into(imageView);
            }

            TextView value = listItem.findViewById(R.id.product_attribute_spinner_row_item_textview);
            value.setText(currentString);

        }
        return listItem;
    }

    @Override
    public View getDropDownView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        return getView(position, convertView, parent);
    }
}

public class ProductAttributeModel {

    private String attributeName;

    private List<String> attributeValues;

    public ProductAttributeModel(String attributeName, List<String> attributeValues) {
        this.attributeName = attributeName;
        this.attributeValues = attributeValues;
    }

    public String getAttributeName() {
        return attributeName;
    }

    public void setAttributeName(String attributeName) {
        this.attributeName = attributeName;
    }

    public List<String> getAttributeValues() {
        return attributeValues;
    }

    public void setAttributeValues(List<String> attributeValues) {
        this.attributeValues = attributeValues;
    }

    @Override
    public String toString() {
        return "ProductAttributeModel{" +
                "attributeName='" + attributeName + '\'' +
                ", attributeValues=" + attributeValues +
                '}';
    }
}

并且我从以下功能启动适配器-

 @Override
    public void setProductPurchaseAttributes() {
        selectedProductAttributesMap = selectedProduct.getAttributesList();
        /*Starting index is the index in which we start to add the dynamic linear layouts that represents products attributes.
        This number should be incremented by 1 every time we do any changes to `activity_product_page.xml` file otherwise the dynamic views
        will be created in the wrong place.
         */
        int startingIndex = 7;
        if (!isProductAvailable) return;
        ArrayList<ProductAttributeModel> productAttributeModels = new ArrayList<>();
        Spinner spinner = new Spinner(this);
        for (Map.Entry<String, List<String>> entry : selectedProductAttributesMap.entrySet()) {

            //Key and value for each iteration

            String key = entry.getKey();
            List<String> value = entry.getValue();

            //creating the linear layout

            LinearLayout linearLayout = new LinearLayout(this);
            linearLayout.setOrientation(LinearLayout.HORIZONTAL);

            //creating the layout params

            LinearLayout.LayoutParams attributeLayoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            LinearLayout.LayoutParams spinnerParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            LinearLayout.LayoutParams textParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);

            //setting margins
            /*These margins values are different than the values in the XML of the activity because this is a dynamically created view*/
            attributeLayoutParams.setMargins(48, 30, 48, 0);
            textParams.setMargins(0, 60, 0, 0);
            linearLayout.setLayoutParams(attributeLayoutParams);

            //creating the text view
            TextView textView = new TextView(this);

            textView.setText(key.concat(":"));
            textView.setLayoutParams(textParams);

            //creating the spinner
            spinner.setLayoutParams(spinnerParams);


            //attribute list adapter
            productAttributeModels.add(new ProductAttributeModel(key, value));
            ColorAttributeArrayAdapter adapter = new ColorAttributeArrayAdapter(this, productAttributeModels);
            spinner.setOnItemSelectedListener(this);
            spinner.setAdapter(adapter);

            //adding to the linear layout

            linearLayout.addView(textView);
            linearLayout.addView(spinner);

            //adding linear layout to root view

            productDetailsViewGroup.addView(linearLayout, startingIndex);
            startingIndex++;
        }
    }

由于某种原因，我只得到一个结果，而不是多个结果。

将适配器实例移动到for循环的末尾将无济于事，已经尝试过了。

进行调试时，我看到适配器的对象在列表中包含4个项目，但仅显示最后一个。好像我在写对象而不是添加它。我想念什么？

Answer 1

将这些行完全移到for循环之外

   ColorAttributeArrayAdapter adapter = new ColorAttributeArrayAdapter(this, productAttributeModels);
   spinner.setOnItemSelectedListener(this);
   spinner.setAdapter(adapter);

您当前正在使用最新的属性模型在for循环的每次运行中创建一个新适配器，并将其附加到微调器，因此微调器到达末尾时仅具有最后一个属性模型的最后一个适配器。在for循环外创建的适配器将具有您添加到productAttributeModels列表中的所有属性。

自定义模型类型的自定义arrayadapter仅返回一个值

1 个答案: