无法解析JSON

Question

我正在尝试解析一些JSON但我遇到了一些麻烦.

这是我已经尝试过的:

ContentValues categories = new ContentValues();     
JSONObject json = new JSONObject(improvedInputStreamAsString);
Iterator keys = json.keys();

while(keys.hasNext()) {
        Object newObj = keys.next();
        String jsonString = newObj.toString();
        if(jsonString == "children") {
            JSONObject newJsn = new JSONObject(jsonString);
            if(newJsn.has("name")) {
                String category = newJsn.getString("name");
                categories.put("categories", category);
            }
        }
    } 

我只是试图从中获取类别JSONObject但由于某种原因jsonString从未评估过children.

这是结构,对不起,我粘贴了这么大的一部分,我发现JSON真的很混乱,很难尝试在保留其完整性的同时将其剪下来,请记住我只是想要得到这个name领域:

{
  "position": "0",
  "children": [
{
  "position": "1",
  "children": [
    {
      "position": "1",
      "children": [
        {
          "position": "3",
          "children": [

          ],
          "category_id": "9",
          "level": "3",
          "is_active": "1",
          "name": "Exfoliants",
          "parent_id": "4"
        },
        {
          "position": "4",
          "children": [

          ],
          "category_id": "10",
          "level": "3",
          "is_active": "1",
          "name": "Moisturisers",
          "parent_id": "4"
        },
        {
          "position": "5",
          "children": [

          ],
          "category_id": "11",
          "level": "3",
          "is_active": "1",
          "name": "Treatments",
          "parent_id": "4"
        },
        {
          "position": "6",
          "children": [

          ],
          "category_id": "12",
          "level": "3",
          "is_active": "1",
          "name": "Cleansers",
          "parent_id": "4"
        },
        {
          "position": "7",
          "children": [

          ],
          "category_id": "13",
          "level": "3",
          "is_active": "1",
          "name": "Skin Toners",
          "parent_id": "4"
        },
        {
          "position": "9",
          "children": [

          ],
          "category_id": "15",
          "level": "3",
          "is_active": "1",
          "name": "Serums",
          "parent_id": "4"
        },
        {
          "position": "10",
          "children": [

          ],
          "category_id": "36",
          "level": "3",
          "is_active": "1",
          "name": "Acne and Blemish Treatments",
          "parent_id": "4"
        },
        {
          "position": "11",
          "children": [

          ],
          "category_id": "40",
          "level": "3",
          "is_active": "1",
          "name": "Oils",
          "parent_id": "4"
        }
      ],
      "category_id": "4",
      "level": "2",
      "is_active": "1",
      "name": "Skincare",
      "parent_id": "2"
    },
    {
      "position": "2",
      "children": [
        {
          "position": "1",
          "children": [

          ],
          "category_id": "16",
          "level": "3",
          "is_active": "1",
          "name": "Sunscreen",
          "parent_id": "5"
        },
        {
          "position": "2",
          "children": [

          ],
          "category_id": "31",
          "level": "3",
          "is_active": "1",
          "name": "Insect Repellent & After Bite",
          "parent_id": "5"
        },
        {
          "position": "3",
          "children": [

          ],
          "category_id": "32",
          "level": "3",
          "is_active": "1",
          "name": "After Sun Lotions",
          "parent_id": "5"
        },
        {
          "position": "4",
          "children": [

          ],
          "category_id": "33",
          "level": "3",
          "is_active": "1",
          "name": "Self Tanning Lotions",
          "parent_id": "5"
        }
      ],
      "category_id": "5",
      "level": "2",
      "is_active": "1",
      "name": "Suncare",
      "parent_id": "2"
    },
    {
      "position": "3",
      "children": [
        {
          "position": "1",
          "children": [

          ],
          "category_id": "17",
          "level": "3",
          "is_active": "1",
          "name": "Shampoo",
          "parent_id": "6"
        },
        {
          "position": "2",
          "children": [

          ],
          "category_id": "18",
          "level": "3",
          "is_active": "1",
          "name": "Conditioner",
          "parent_id": "6"
        },
        {
          "position": "3",
          "children": [

          ],
          "category_id": "19",
          "level": "3",
          "is_active": "1",
          "name": "Treatments",
          "parent_id": "6"
        },
        {
          "position": "4",
          "children": [

          ],
          "category_id": "20",
          "level": "3",
          "is_active": "1",
          "name": "Toner",
          "parent_id": "6"
        },
        {
          "position": "6",
          "children": [

          ],
          "category_id": "34",
          "level": "3",
          "is_active": "1",
          "name": "Styling",
          "parent_id": "6"
        },
        {
          "position": "7",
          "children": [

          ],
          "category_id": "39",
          "level": "3",
          "is_active": "1",
          "name": "Serum",
          "parent_id": "6"
        }
      ],
      "category_id": "6",
      "level": "2",
      "is_active": "1",
      "name": "Hair",
      "parent_id": "2"
    },



{
  "position": "0",
  "children": [
    {
      "position": "1",
      "children": [
        {
      "position": "1",
      "children": [
        {
          "position": "3",
          "children": [                
          ],
          "category_id": "9",
          "level": "3",
          "is_active": "1",
          "name": "Exfoliants",
          "parent_id": "4"
        },            
        {
          "position": "6",
          "children": [

          ],
          "category_id": "12",
          "level": "3",
          "is_active": "1",
          "name": "Cleansers",
          "parent_id": "4"
        },
     ],
      "category_id": "4",
      "level": "2",
      "is_active": "1",
      "name": "Skincare",
      "parent_id": "2"
    },
    {
      "position": "2",
      "children": [
        {
          "position": "1",
          "children": [

          ],
          "category_id": "16",
          "level": "3",
          "is_active": "1",
          "name": "Sunscreen",
          "parent_id": "5"
        },

Answer 1

您需要使用String.equals()来比较字符串:

if(jsonString.equals("children")) { ... }

jsonString =="children"比较对象引用,而不是字符串.