Android 如何解析这个json数据？并将其直接存储在数据库中，然后在listview中显示

//这是我的json数据 json///这是主json对象

{
  "cityMasterEntity":
--This is array
 [
    {
      "CityId": 1,
      "CityName": "Ahmedabad",
      "CreatedDate": "\/Date(1373091319697+0530)\/",
      "IsActive": true,
      "StateId": 6,
      "StateName": "Gujarat\u000d\u000a",
      "UpdatedDate": null
    },
    {
      "CityId": 3,
      "CityName": "Rajkot",
      "CreatedDate": "\/Date(1373091319697+0530)\/",
      "IsActive": true,
      "StateId": 6,
      "StateName": "Gujarat\u000d\u000a",
      "UpdatedDate": null
    },
    {
      "CityId": 2,
      "CityName": "Surat",
      "CreatedDate": "\/Date(1373091319697+0530)\/",
      "IsActive": true,
      "StateId": 6,
      "StateName": "Gujarat\u000d\u000a",
      "UpdatedDate": null
    }`enter code here`
  ]
}

解析

JSONObject jb = new JSONObject("yourString");
JSONArray city = jb.getJSONArray("cityMasterEntity");
for(int i=0;i<city.length();i++)
{
   JSONObject jb1 =(JSONObject) city.getJSONObject(i);
   int id = jb1.getInt("CityId");
   String name = jb1.getString("CityName");  
   ...// similarl for name and others
}

JSONObject jb=newjsonobject（“yourString”）；
JSONArray city=jb.getJSONArray（“cityMasterEntity”）；
对于（int i=0；iYash），您应该将其添加到其他问题中，因为元素太少，无法知道您正在尝试做什么以及到目前为止尝试了什么……我们甚至不知道语言（javascript？）或如何显示它（html？）。你为什么问第二个问题？你应该加入同样的问题。我的问题是：空指针异常即将到来，citymaster=newrummy.getJSONArray（CITYARRAY）；///for（int i=0；icitymaster

为空。我会通过记录json来检查。为什么会被否决？不知道我没有否决它。可能是错误地做了。@yash_5111您的响应为空。所以您需要检查如何下载json。@yash_5111检查编辑它应该起作用。@Raghunandan不知道谁被否决了。但是这些都是错误的答案是有用的。

JSONObject jb = new JSONObject("yourString");
JSONArray city = jb.getJSONArray("cityMasterEntity");
for(int i=0;i<city.length();i++)
{
   JSONObject jb1 =(JSONObject) city.getJSONObject(i);
   int id = jb1.getInt("CityId");
   String name = jb1.getString("CityName");  
   ...// similarl for name and others
}

 class TheTask extends AsyncTask<Void,Void,String>
  {

    @Override
    protected String doInBackground(Void... arg0) {
        String _response= null;
        try
        {
             HttpClient httpclient = new DefaultHttpClient();
             httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
             HttpGet request = new HttpGet("http://www.clubrummy.in/MobileWCF/RummyService/GetMasterDetail");  
             HttpResponse response = httpclient.execute(request);
             HttpEntity resEntity = response.getEntity();
             _response=EntityUtils.toString(resEntity); // content will be consume only once
                Log.i(".......",_response);
        }catch(Exception e)
        {

        }
        return _response;
    }

   @Override
   protected void onPostExecute(String result) {
    // TODO Auto-generated method stub
    super.onPostExecute(result);
    if(result!=null)
    {
        try
        {
        JSONObject jb = new JSONObject(result);
        JSONArray city = jb.getJSONArray("cityMasterEntity");
        for(int i=0;i<city.length();i++)
        {
           JSONObject jb1 =(JSONObject) city.getJSONObject(i);
           int id = jb1.getInt("CityId");
           String name = jb1.getString("CityName");  
           Log.i("Name is",""+name);
        }
        }catch(Exception e)
        {
            e.printStackTrace();
        }

        }
    }
    }

  class TheTask extends AsyncTask<Void,Void,Void>
  {

    @Override
    protected Void doInBackground(Void... arg0) {
        String _response= null;
        try
        {
             HttpClient httpclient = new DefaultHttpClient();
             httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
             HttpGet request = new HttpGet("http://www.clubrummy.in/MobileWCF/RummyService/GetMasterDetail");  
             HttpResponse response = httpclient.execute(request);
             HttpEntity resEntity = response.getEntity();
             _response=EntityUtils.toString(resEntity); // content will be consume only once
                Log.i(".......",_response);
                if(_response!=null)
                {

                    JSONObject jb = new JSONObject(_response);
                    JSONArray city = jb.getJSONArray("cityMasterEntity");
                    for(int i=0;i<city.length();i++)
                    {
                       JSONObject jb1 =(JSONObject) city.getJSONObject(i);
                       int id = jb1.getInt("CityId");
                       String name = jb1.getString("CityName");  
                       Log.i("Name is",""+name);
                    }
                }
        }catch(Exception e)
        {

        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);

  }
  }