Question

{   "gb": [
    {
      "omrid": "gis-n",
      "status": 0,
      "grupp": 1
    },
    {
      "omrid": "gis-s",
      "status": 0,
      "grupp": 1
    },
    {
      "omrid": "gis-c",
      "status": 0,
      "grupp": 1
    },
    {
      "omrid": "gis-h",
      "status": 0,
      "grupp": 1
    },
    {
      "omrid": "gis-g",
      "status": 0,
      "grupp": 1
    },
    {
      "omrid": "hes",
      "status": 0,
      "grupp": 2
    }   ] }

以上是我的JSON字符串（编辑得更短，因为它在这里变得太长了。）

我正在尝试找到一种方法来迭代每个组并使用它们创建一个togglebutton。

所以我要做的是创建一个togglebutton，其名称在“omrid”中以“status”的开/关状态表示。 “grupp”最终将用于将切换分组，但现在不重要。

我搜索并搜索了这个，没有人似乎有我特定的JSON字符串组成，我有点像JSON / Android SDK的菜鸟。

Answer 1

我会使用JSONObject。在Android或PC上运行的地方没有区别。

String str = "{" + 
            "    \"gb\": [" + 
            "        {" + 
            "            \"omrid\": \"gis-n\"," + 
            "            \"status\": 0," + 
            "            \"grupp\": 1" + 
            "        }," + 
            "        {" + 
            "            \"omrid\": \"gis-s\"," + 
            "            \"status\": 0," + 
            "            \"grupp\": 1" + 
            "        }," + 
            "        {" + 
            "            \"omrid\": \"gis-c\"," + 
            "            \"status\": 0," + 
            "            \"grupp\": 1" + 
            "        }," + 
            "        {" + 
            "            \"omrid\": \"gis-h\"," + 
            "            \"status\": 0," + 
            "            \"grupp\": 1" + 
            "        }," + 
            "        {" + 
            "            \"omrid\": \"gis-g\"," + 
            "            \"status\": 0," + 
            "            \"grupp\": 1" + 
            "        }," + 
            "        {" + 
            "            \"omrid\": \"hes\"," + 
            "            \"status\": 0," + 
            "            \"grupp\": 2" + 
            "        }" + 
            "    ]" + 
            "}";

    JSONObject jsonObject = new JSONObject(str);

    JSONArray gb = jsonObject.getJSONArray("gb");

    for (int j = 0; j < gb.length(); j++) {
        JSONObject element = gb.getJSONObject(j);

        int status = element.getInt("status");
        int grupp = element.getInt("grupp");
        String omrid = element.getString("omrid");

        System.out.println("status=" + status + "; grupp=" + grupp + "; omrid=" + omrid);

//create togglebutton here
    }

输出：

status=0; grupp=1; omrid=gis-n
status=0; grupp=1; omrid=gis-s
status=0; grupp=1; omrid=gis-c
status=0; grupp=1; omrid=gis-h
status=0; grupp=1; omrid=gis-g
status=0; grupp=2; omrid=hes

Answer 2

这是代码

JSONObject json = new JSONObject(String your_json_string);
JSONArray arr = json.getJSONArray("gb");
for(int i = 0;i<arr.length();i++)
{
JSONObject temp = arr.getJSONObject(i);
temp.getString("omrid");//use them as your needs
temp.getString("status");//use them as your needs
temp.getString("grupp");//   use them as your needs
}

希望它有所帮助。

Answer 3

使用以下代码进行迭代。

如下所示制作一个JSONParser类。

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;

public class JSONParser {

    public JSONParser() {

    }

    JSONObject jObj;
    String json;
    InputStream is = null;

    public JSONObject getJsonFromUrl(String url) {
        // TODO Auto-generated method stub

        try {
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);
            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();

            is = httpEntity.getContent();
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;

            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();

            System.out.println("Json String : " + json);
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            jObj = new JSONObject(json);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return jObj;
    }
}

在MainActivity中使用以下迭代。

JSONParser parser = new JSONParser();
JSONObject o = parser.getJsonFromUrl("yourjsonurl");

JSONArray array = o.getJSONArray("gb");

for (int i = 0; i < array.length(); i++){
    JSONObject j = array.getJSONObject(i);

    String omrid = j.getString("omrid");
    String status= j.getString("status");
    String grupp = j.getString("grupp");
}

如何在Android中迭代JSON数据

3 个答案: