如何使用Android读取JSON中的属性值 [英] how to read attribute value in json using android

问题描述

我想读取json属性值，我的json格式是这样

{"content":{"@attributes" : { "start_limit" : "x","end_limit" : "x","total_records" : "x"},"item":[{"category":"x","distance":"x"}]}},

我想从json属性读取total_record的值.我该如何阅读?请帮助我

谢谢 约翰·里克

解决方案

首先检查您的JSON字符串.将其更改为

的

{"content":{"@attributes" : { "start_limit" :"x","end_limit" : "x","total_records" : "x"}},"item":[{"category":"x","distance':"x"}]}}

{"content":{"@attributes" : { "start_limit" : "x","end_limit" : "x","total_records" : "x"},"item":[{"category":"x","distance":"x"}]}}

您在其中的"item"之前留了一个右花括号.

下面是获取"total_records"值的代码

String jsonString = "{'content':{'@attributes' : { 'start_limit' :'x','end_limit' : 'x','total_records' : 'x'}},'item':[{'category':'x','distance':'x'}]}}";

public String getTotalRecords(String jsonString){
    try {
            JSONObject mainObject = new JSONObject(jsonString);
            JSONObject contentObject = mainObject.getJSONObject("content");
            JSONObject attributesObject = contentObject.getJSONObject("@attributes");
            String totalRecords = attributesObject.getString("total_records");
            Log.i("Total Records", totalRecords);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    return totalRecords;
}

希望您能理解问题.

I want to read json attribute value, my json format like this

{"content":{"@attributes" : { "start_limit" : "x","end_limit" : "x","total_records" : "x"},"item":[{"category":"x","distance":"x"}]}},

I want to read total_record's value from json attributes. How can I read ? Please help me

Thanks John Rick

解决方案

First of all check your JSON String.Change it to

{"content":{"@attributes" : { "start_limit" :"x","end_limit" : "x","total_records" : "x"}},"item":[{"category":"x","distance':"x"}]}} from

{"content":{"@attributes" : { "start_limit" : "x","end_limit" : "x","total_records" : "x"},"item":[{"category":"x","distance":"x"}]}}

In which you left one closing curly brace before "item".

Now below is the code to get value of "total_records"

String jsonString = "{'content':{'@attributes' : { 'start_limit' :'x','end_limit' : 'x','total_records' : 'x'}},'item':[{'category':'x','distance':'x'}]}}";

public String getTotalRecords(String jsonString){
    try {
            JSONObject mainObject = new JSONObject(jsonString);
            JSONObject contentObject = mainObject.getJSONObject("content");
            JSONObject attributesObject = contentObject.getJSONObject("@attributes");
            String totalRecords = attributesObject.getString("total_records");
            Log.i("Total Records", totalRecords);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    return totalRecords;
}

Hope you understand the problem.

这篇关于如何使用Android读取JSON中的属性值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！