java - 从 ArrayList 内的 HashMap 创建 View

Question

这是一个我似乎无法理解的逻辑问题，但我认为我已经很接近了。我从 JSON 响应中获取值并将它们存储在 HashMap 中，然后将 HashMap 添加到 ArrayList 。

doInBackground

protected String doInBackground(String... args) {

            // getting JSON string from URL
            companyName = cn.getText().toString();
            projectName = pn.getText().toString();
            String componentName = (String) ab.getSelectedTab().getText();

            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
            nameValuePairs.add(new BasicNameValuePair("company", companyName));
            nameValuePairs.add(new BasicNameValuePair("project", projectName));
            nameValuePairs.add(new BasicNameValuePair("component",
                    componentName));

            JSONObject json = jParser.makeHttpRequest(url, "POST",
                    nameValuePairs);

            // Check your log cat for JSON response
            Log.d("All Questions: ", json.toString());

            try {
                // Checking for SUCCESS TAG
                int success = json.getInt(TAG_SUCCESS);

                if (success == 1) {
                    Log.v("RESPONSE", "Success!");
                    // products found: getting Array of Questions
                    questions = json.getJSONArray(TAG_QUESTIONS);

                    // looping through All Questions
                    for (int i = 0; i < questions.length(); i++) {

                        JSONObject c = questions.getJSONObject(i);

                        // Storing each JSON item in variable
                        String name = c.getString(TAG_NAME);
                        String field = c.getString(TAG_FIELD);
                        String value = c.getString(TAG_VALUE);

                        // creating new HashMap
                        HashMap<String, String> map = new HashMap<String, String>();

                        // adding each child node to HashMap key => value
                        map.put(TAG_NAME, name);
                        map.put(TAG_FIELD, field);
                        map.put(TAG_VALUE, value);
                        for (String key: map.keySet()) {
                            System.out.println("key : " + key);
                            System.out.println("value : " + map.get(key));
                        }
                        infoList.add(map);
                    }

                } else {
                    // no products found
                    Log.v("ERROR", "No JSON for you!");
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            return null;
        }

现在上面的 for 循环 从我的 JSON 打印以下内容

06-03 19:35:29.928: I/System.out(9691): key : option_value
06-03 19:35:29.928: I/System.out(9691): value : 
06-03 19:35:29.928: I/System.out(9691): key : field_type
06-03 19:35:29.928: I/System.out(9691): value : Text Field
06-03 19:35:29.928: I/System.out(9691): key : display_name
06-03 19:35:29.928: I/System.out(9691): value : Store #
06-03 19:35:29.928: I/System.out(9691): key : option_value
06-03 19:35:29.928: I/System.out(9691): value : 
06-03 19:35:29.928: I/System.out(9691): key : field_type
06-03 19:35:29.928: I/System.out(9691): value : Text Field
06-03 19:35:29.928: I/System.out(9691): key : display_name
06-03 19:35:29.938: I/System.out(9691): value : Address
06-03 19:35:29.938: I/System.out(9691): key : option_value
06-03 19:35:29.938: I/System.out(9691): value : Education
06-03 19:35:29.938: I/System.out(9691): Health
06-03 19:35:29.938: I/System.out(9691): Computers
06-03 19:35:29.938: I/System.out(9691): Food
06-03 19:35:29.938: I/System.out(9691): Retail
06-03 19:35:29.938: I/System.out(9691): Other
06-03 19:35:29.938: I/System.out(9691): key : field_type
06-03 19:35:29.938: I/System.out(9691): value : Drop Down Menu
06-03 19:35:29.938: I/System.out(9691): key : display_name
06-03 19:35:29.938: I/System.out(9691): value : Type of Business
06-03 19:35:29.938: I/System.out(9691): key : option_value
06-03 19:35:29.938: I/System.out(9691): value : Yes
06-03 19:35:29.938: I/System.out(9691): No
06-03 19:35:29.938: I/System.out(9691): key : field_type
06-03 19:35:29.938: I/System.out(9691): value : Radio
06-03 19:35:29.938: I/System.out(9691): key : display_name
06-03 19:35:29.938: I/System.out(9691): value : Is this business good?
06-03 19:35:29.938: I/System.out(9691): key : option_value
06-03 19:35:29.938: I/System.out(9691): value : Yes
06-03 19:35:29.938: I/System.out(9691): No
06-03 19:35:29.938: I/System.out(9691): key : field_type
06-03 19:35:29.938: I/System.out(9691): value : Check Box
06-03 19:35:29.938: I/System.out(9691): key : display_name
06-03 19:35:29.938: I/System.out(9691): value : Are they nice people?

JSON

{
    "questions": [
        {
            "display_name": "Store #",
            "field_type": "Text Field",
            "option_value": ""
        },
        {
            "display_name": "Address",
            "field_type": "Text Field",
            "option_value": ""
        },
        {
            "display_name": "Type of Business",
            "field_type": "Drop Down Menu",
            "option_value": "Education\r\nHealth\r\nComputers\r\nFood\r\nRetail\r\nOther"
        },
        {
            "display_name": "Is this business good?",
            "field_type": "Radio",
            "option_value": "Yes\r\nNo"
        },
        {
            "display_name": "Are they nice people?",
            "field_type": "Check Box",
            "option_value": "Yes\r\nNo"
        }
    ],
    "success": 1
}

现在在 onPostExecute() 中，我需要循环遍历名为“infoList”的 ArrayList，然后获取 HashMap 值。根据该信息，我需要创建 View 。所以我的代码应该看起来像这样，但我无法正确执行。

protected void onPostExecute(String string) {
    // dismiss the dialog
    pDialog.dismiss();  
    for (int i = 0; i < infoList.size(); i++) {
        // get HashMap, how? i.toString()?
        for (String key: map.keySet()) {
        if (map.get(key).equals("Radio")) {
                //create RadioButtons, setTexts to option_value values         
            } else if (map.get(key).equals("Text Field")) {
                //create EditText
            } else if (map.get(key).equals("Check Box")) {
                //create CheckBox's, setTexts to option_value values
            } else if (map.get(key).equals("Drop Down Menu")) {
                //create Spinner, place option_value values into array and populate
            }
         }
    }

那么我是否让事情变得比需要的更困难了？我觉得他们一定是一种更简单的方法。如果没有，我将非常感谢编写此 for 循环 的帮助。

编辑回复评论

我希望它能够在 fragment 中膨胀一个布局，如下所示

Store # ------------------ <EditText>
Address ------------------ <EditText>
Is this business good? --- <RadioButton>

等等。 RadioButton 或 Checkbox 将通过可选值设置其文本

完成后，我会将其发送回我最初从中获取此信息的数据库。

Answer 1

为您的问题构建一个 POJO 类:

Class Questions{
private String Name;
private String field_type;
private ArrayList option_value;
<Getter and Setters>
}

将其用作 POJO 类。并将其添加到 ArrayList 中。

仅在需要时才使用 map 。使用 POJO/Business Objects 传输数据就足够了，而且是最适合的。

请告诉我你的想法。