Question

您好我是Android编程新手，我正在开发一个项目，将列表转换为json对象并将其存储在服务器中并检索它。我能够将json对象发送到服务器并存储它，但我无法检索它。我应该使用什么方法来检索存储在服务器上的json对象？

Answer 1

你可以参考下面的类......调用getJSONfromURL（YOUR_POISON_GIRL），方法将返回给你JSONObject。我希望这会有用

 public class JSONfunctions {
 public static JSONObject getJSONfromURL(String url) {
 InputStream is = null;
 JSONObject jObj = null;
 String json = "";
// Making HTTP request
    try {
        // defaultHttpClient
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet(url);

        HttpResponse httpResponse = httpClient.execute(httpget);
        HttpEntity httpEntity = httpResponse.getEntity();
        is = httpEntity.getContent();

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "UTF-8"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    // try parse the string to a JSON object
    try {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }
    // return JSON String
    return jObj;
  }

}

Answer 2

要从服务器检索JSON，您必须首先使用DefaultHttpClient与服务器建立连接。希望您这样做。如果是，请发布您的代码，否则请查看

www.androidhive.info/2012/01/android-json-parsing-tutorial 或者谷歌，当你有URL时，你将有很多帮助来解析JSON。

从服务器读取json对象

2 个答案: