Question

我已经使用Node.js和RESTful API创建了一个AsyncTask来检索数据。我在StringBuilder中存储输入，但问题是我想从结果中检索一个键：值对（Error : true/false是特定的）。由于结果不是JSON形式，我不能使用.get("Element")方法。这是我的AsyncTask：

class RegisterAsync extends AsyncTask<String , Void, Integer> {

@Override     
protected Integer doInBackground(String... params) {
    String toDO = params[0];
    StringBuilder sb = new StringBuilder();
    Boolean isError = false;
    int toReturn;
    try {

        URL url = new URL("http://192.168.0.14:3030/api/insert");
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setDoOutput(true);
        con.setRequestMethod("POST");
        con.setRequestProperty("Content-Type", "application/json");
        OutputStream os = con.getOutputStream();
        os.write(toDO.getBytes());
        os.flush();
        BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String line = "";
        while((line = reader.readLine())!=null){
            sb.append(line + '\n');
        }
        reader.close();
        Log.d("RecvdToRegisterAsync: " , sb.toString());

        //got result in sb... What next???


    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return null;

}

}

Answer 1

您可以根据响应字符串将字符串转换为JSONObject或JSONArray。像这样：

    JSONObject response = new JSONObject(sb.toString());
    String key=response.get("key");

我希望它有所帮助。

Answer 2

试试这个;）

   jsonResponse = new String(serverResponse, "UTF-8");
   JSONObject jObject = new JSONObject(jsonResponse);
   JSONObject json= jObject.getJSONObject("data");
    //there is the data in String format
   String data= json.getString(objectToFind);

解析AsyncTask中的字符串中的JSON数据

2 个答案: