使用 Kotlin 解析嵌套 json array/object

Question

我在这里读了一些帖子，说要使用 gson 或其他东西。

我打算稍后切换到 gson，但想知道如何使用 kotlin 进行解析。

JSON 对象：

{
   "childScoresList":[     // line 1,2 gets the JSON array
   {
         "child_id":"1",
         "score_date":"2022-03-27",
         "category_id":"1",
         "category_name":"Preschool Math",    // line 3,4 gets this data
         "classes":[
         {
               "category_name":"Preschool Math",    
               "class_name":"Number Blocks",       // How do I get class_name which is nested? 
               "class_id":"1",
               "class_description":"Ones, Tens, Hundreds Blocks used to create given numbers.",
               "skills":[
               {
                     "skill_id":"1",
                     "skill_name":"Place Value",   // After I figure out class_name, skill_name should be very similar
                     "skill_description":"Knowing the place value of specific elements.",
                     "skill_score":"50"
               },

Kotlin 代码：

1   val obj = JSONObject(response.toString())
2   val jsonArray = obj.getJSONArray("childScoresList")
3   for (i in 0 until jsonArray.length()) {
4        val categoryName = jsonArray.getJSONObject(i).getString("category_name")
5    }

如何获取 class_name 中的数据？我尝试了各种方法，但无法正常工作。

Answer 1

必须先根据以下代码从对象中获取JSONArray，然后访问class_name变量

val obj = JSONObject(js)
val jsonArray = obj.getJSONArray("childScoresList")
for (i in 0 until jsonArray.length()) {
    val classes = jsonArray.getJSONObject(i).getJSONArray("classes")
    for (x in 0 until classes.length()) {
        val categoryName = classes.getJSONObject(x).getString("category_name")
        val className = classes.getJSONObject(x).getString("class_name")
    }
}

使用 Kotlin 解析嵌套 json array/object

Using Kotlin to parse nested json array/object

arrays

android

json

kotlin