Question

下面存储在arraylist ArrayListlatestNews;

中的JSONObject格式字符串

response.toString（）是

{
    "blue": [
        {
            "title": "http:\\www.b"
        },
        {
            "info": " http:\\www.b"
        },
        {
            "link": "http:\\www.b"
        },
        {
            "image": "http:\\www.b"
        },
        {
            "pubDate": "http:\\www.b"
        },
        {
            "guid": "http:\\www.b"
        }
    ]
}{
    "blue": [
        {
            "title": "http"
        },
        {
            "info": " 5449 1616"
        },
        {
            "link": "http:\\www.b"
        },
        {
            "image": "http:\\www.b"
        },
        {
            "pubDate": "Thu, 26 Jun 2014 16:25:25 GMT"
        },
        {
            "guid": "http:\\www.b"
        },
        {
            "title": "Weekend"
        },
        {
            "info": " 3345 4353"
        },
        {
            "link": "http:\\www.b.."
        },
        {
            "image": "http:\\www.b..."
        },
        {
            "pubDate": "Mon, 23 Jun 2014 09:47:25 GMT"
        },
        {
            "guid": "http:\\www.b"
        }
    ]
}{
    "blue": [
        {
            "title": "KARAVAN "
        },
        {
            "info": " 4444444"
        },
        {
            "link": "http:\\www...."
        },
        {
            "image": "http:\\www...."
        },
        {
            "pubDate": "Thu, 26 Jun 2014 16:25:25 GMT"
        },
        {
            "guid": "http:\\www...."
        },
        {
            "title": "IMC "
        },
        {
            "info": " 134 3333"
        },
        {
            "link": "http:\\www...."
        },
        {
            "image": "http:\\www...."
        },
        {
            "pubDate": "Mon, 23 Jun 2014 09:47:25 GMT"
        },
        {
            "guid": "http:\\www...."
        },
        {
            "title": "property "
        },
        {
            "info": " 633 1352 \ 537 18211"
        },
        {
            "link": "http:\\www....l"
        },
        {
            "image": "http:\\www...."
        },
        {
            "pubDate": "Thu, 26 Jun 2014 16:09:01 GMT"
        },
        {
            "guid": "http:\\www...."
        }
  ....

LatestNews.class

public class LatestNews {

    public String title;
    public String info;
    public String link;
    public String image;
    public String pubDate;
    public String guid;

    public LatestNews (String title_,String info_,String link_,String image_,String pubDate_,String guid_){

        this.title=title_;
        this.info=info_;
        this.link=link_;
        this.image=image_;
        this.pubDate=pubDate_;
        this.guid=guid_;

    }

}

我按如下方式提取json

JSONObject obj = new JSONObject(response.toString());
                 JSONArray venues = obj.getJSONArray("blue");
                System.out.println("response object "+venues.length());

                for (int x=0;x<venues.length();x++){
                    JSONObject keyValue = venues.getJSONObject(x);

                    if (keyValue.has("title")){
                        System.out.println("xxxtitle "+keyValue.getString("title"));

                    }

                }

但是当我打印keyValue.getString（“title”）时，只打印第一个标题。如何在将每个蓝色对象保存到arraylist之前打印所有元素。欢迎任何帮助。

Answer 1

首先，大多数情况下，您的JSON响应不符合标准和优化的响应。

实现您的Web服务逻辑以获得以下格式的响应，它将帮助您减少解析逻辑/代码和迭代，这将有助于您提高应用程序性能。

{
    "blue": [
        {
            "title": "http:\\www.b",
            "info": " http:\\www.b",
            "link": "http:\\www.b",
            "image": "http:\\www.b",
            "pubDate": "http:\\www.b",
            "guid": "http:\\www.b"
        },
        {
            "title": "http:\\www.b",
            "info": " http:\\www.b",
            "link": "http:\\www.b",
            "image": "http:\\www.b",
            "pubDate": "http:\\www.b",
            "guid": "http:\\www.b"
        }
    ]
}

现在关于JSON解析教程/代码，网上和Stackoverflow上都有大量示例，请点击此处：JSON Parsing in Android

您的代码和JSON格式/逻辑中的错误： 正如你所说，只有第一个标题被打印出来，原因就是你写了obj.getJSONArray("blue");，它只会给你第一个'蓝色'对象，所以它会给你一个蓝色对象的标题值。

我已经在上面建议了一个优化的解决方案！

将json字符串保存到arraylist

1 个答案: