Question

我无法读取json数据并在andord.list视图中绑定到列表视图，但是doctype的值始终显示为v4.could你能告诉我我在code.i附带了解错的代码json数据。

[
{
id: "HT20140109105317640",
basePath: "D:\img",
lstDocType: [
{
doctype: "PP1",
imageName: "CH100610_002_003_PP1.jpg",
imageupload: false
},
{
doctype: "PP2",
imageName: "CH100610_002_003_PP2.jpg",
imageupload: false
},
{
doctype: "V1",
imageName: "CH100610_002_003_V1.jpg",
imageupload: false
},
{
doctype: "V2",
imageName: "CH100610_002_003_V2.jpg",
imageupload: false
},
{
doctype: "V3",
imageName: "CH100610_002_003_V3.jpg",
imageupload: false
},
{
doctype: "V4",
imageName: "CH100610_002_003_V4.jpg",
imageupload: false
}
],
f_FNAME: "SANJAY",
f_FORM: "002",
f_TCD: "CH100610",
f_TNO: "003",
f_LNAME: "NANKANI"
},
{},
{},
{},
{},
{},
{},
{},
{},
{}
]

这是解析json数据的代码

public class DisplayList extends AsyncTask<String, String, String>
    {


        @Override
        protected void onPreExecute() 
        {
            // TODO Auto-generated method stub
            super.onPreExecute();
            pd=new ProgressDialog(MainActivity.this);
            pd.setMessage("Please Wait List Is Loading");
            pd.setCancelable(false);
            pd.show();

        }

        @Override
        protected String doInBackground(String... params)
        {
            // TODO Auto-generated method stub
            try
            {
                // create instance of json data class
                TourList tl=new TourList();
                jarray=tl.getJsonFromUrl("http://192.168.1.239:8080/VisaDocUpload/historycon/selectbycount/0/10");
                for(int i=0;i<jarray.length();i++)
                {
                    HashMap<String,String> map=new HashMap<String,String>();
                    JSONObject c=jarray.getJSONObject(i);
                    id=c.getString(KEY_ID);

                    JSONArray doct=c.getJSONArray("lstDocType");
                    for(int j=0;j<doct.length();j++)
                    {
                        JSONObject jo=doct.getJSONObject(j);
                        doctype=jo.getString(KEY_DOCTYPE);


                    }

                    map.put(KEY_ID,id);
                    map.put(KEY_DOCTYPE,doctype);
                    arraylist.add(map);
                }



            }
            catch(Exception e)
            {
                Log.d("In Back","");
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) 
        {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            pd.dismiss();
            lv.setAdapter(new MyTourDisplay(MainActivity.this,arraylist));
            Toast.makeText(getApplicationContext(), ""+id+doctype,Toast.LENGTH_LONG).show();

        }


    }

Answer 1

解析是正确的，问题与你只是在更多内部for循环中分配doctype这一事实有关，因此，在地图中，你将最后一个赋值给doctype

private class Holder {
  public ArrayList<String>() docLst;
  // possible more kind of elements
}

然后：

Holder holder = new Holder();  
holder.docLst = new ArrayList<String>();

for(int j=0;j<doct.length();j++) {
     JSONObject jo=doct.getJSONObject(j);
     doctype=jo.getString(KEY_DOCTYPE);
     holder.docLst.add(doctype);
 }

 map.put(id, holder);

当然，您的HashMap必须属于<String, Holder>

类型

Answer 2

使用这种JSON格式：

  {
     "array" : [
    {
    id: "HT20140109105317640",
    basePath: "D:\img",
    lstDocType: [
           {
            doctype: "PP1",
            imageName: "CH100610_002_003_PP1.jpg",
            imageupload: false
            },
            {
            doctype: "PP2",
            imageName: "CH100610_002_003_PP2.jpg",
            imageupload: false
            }
         ]
     }
    ]
}

然后继续这样：

    json=tl.getJsonFromUrl("http://192.168.1.239:8080/VisaDocUpload/historycon/selectbycount/0/10");

JSONObject jsonObj = new JSONObject(json);
JSONArray jarray = jsonObj.getJSONArray("array");
for(int i=0;i<jarray.length();i++)
{
//exec your code here

}

我不确定这是否适用于imageupload：假没有引号。

无法用json对象解析json数组

2 个答案: