Android 中的 JSON 错误“java.lang.String 类型结果的值无法转换为 JSONArray”

我用的是link http://p-xr.com/android-tutorial-how-to-parse-read-json-data-into-a-android-listview/对于 JSON RPC。我得到了预期的答复。但是当我尝试解析响应时，它给了我 json 错误。

My code:

JSONEntity entity = new JSONEntity(jsonRequest);
    HttpPost request = new HttpPost("http://192.168.1.150/jsondemo12/service.asmx");
    request.setEntity(entity);
    HttpResponse response = httpClient.execute(request);
    StatusLine statusLine = response.getStatusLine();
    int statusCode = statusLine.getStatusCode();
    if (statusCode == 200) {
        HttpEntity httpEntity = response.getEntity();
        InputStream content = httpEntity.getContent();

        BufferedReader reader = new BufferedReader(
                new InputStreamReader(content,"iso-8859-1"),8);
        String line;
        while ((line = reader.readLine()) != null) {
            builder.append(line);
        }
        content.close();
    } else {
        Log.e(AndroidJSONActivity.class.toString(), "Failed to download file");
    }


    strJSONValue=builder.toString();

    txtViewParsedValue.append("\n+++++++++++++\n"+strJSONValue+"\n");
    try {
        parseJSON();
    } catch (JSONException e) {
        Log.e("error","Error while parsing!!!");
        e.printStackTrace();
    }
    Log.e("response", strJSONValue);
public void parseJSON() throws JSONException
    {
        String attr1="",attr2="";
        jsonObject = new JSONObject(strJSONValue);
        JSONArray  result = jsonObject.getJSONArray("result");    <- Error in this line!!!
        for(int i=0;i < result.length();i++){
            JSONObject e = result.getJSONObject(i);
            attr1 = "ExhibitorID: "+ e.getString("ExhibitorID");
            attr2 = "ExhibitorName: "+e.getString("ExhibitorName");
        }
        strParsedValue=attr1+"\n"+attr2;
        Log.d("Parse", attr1);
        Log.d("Parse", attr2);

        txtViewParsedValue.append("\n**********\nParsed Value: \n");
        txtViewParsedValue.append(strParsedValue);
    }

我在“strJSONValue”中得到的结果是字符串格式，没有开始和结束双引号。 喜欢：

{"id":2,"result":"[
{\"ExhibitorID\":42, etc....}
]"}

结果字符串符合要求，但我无法根据要求将字符串解析为 JSON 对象。它在 Logcat 中给出错误：org.json.JSONException: Value <content of the string> at result of type java.lang.String cannot be converted to JSONArray

请帮我。 谢谢

你的结果实际上返回一个字符串而不是 json 数组。如果你的 json 格式是这样的，它将返回 json 数组

{
  "id": 2,
  "result": [
    {
      "ExhibitorID": 42
    }
  ]
}

目前它是这种形式：

{
  "id": 2,
  "result": "[ {\"ExhibitorID\":42, etc....} ]"
}