Question

我正在尝试与我的网络服务器交换数据。我遇到问题的代码是：

public void getOnlineData(View view) {
        try {
            // http://androidarabia.net/quran4android/phpserver/connecttoserver.php
            int TIMEOUT_MILLISEC = 10000;
            // Log.i(getClass().getSimpleName(), "send  task - start");
            HttpParams httpParams = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(httpParams,
                    TIMEOUT_MILLISEC);
            HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);
            //
            HttpParams p = new BasicHttpParams();
            // p.setParameter("name", pvo.getName());
            p.setParameter("user", "1");

            // Instantiate an HttpClient
            HttpClient httpclient = new DefaultHttpClient();
            String url = "http://twenty5eight.co.uk/portal/" + 
                         "json/json.php";
            HttpPost httppost = new HttpPost(url);

            // Instantiate a GET HTTP method
            try {
                Log.i(getClass().getSimpleName(), "send  task - start");
                //
                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
                        2);
                nameValuePairs.add(new BasicNameValuePair("user", "1"));
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                ResponseHandler<String> responseHandler = new BasicResponseHandler();
                String responseBody = httpclient.execute(httppost,
                        responseHandler);
                // Parse
                JSONObject json = new JSONObject(responseBody);
                JSONArray jArray = json.getJSONArray("posts");
                ArrayList<HashMap<String, String>> mylist = 
                       new ArrayList<HashMap<String, String>>();

                for (int i = 0; i < jArray.length(); i++) {
                    HashMap<String, String> map = new HashMap<String, String>();
                    JSONObject e = jArray.getJSONObject(i);
                    String s = e.getString("post");
                    JSONObject jObject = new JSONObject(s);

                    map.put("id", jObject.getString("id"));
                    map.put("name", jObject.getString("name"));
                    map.put("birthyear", jObject.getString("birthyear"));

                    mylist.add(map);
                }
                Toast.makeText(this, responseBody, Toast.LENGTH_LONG).show();


            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            // Log.i(getClass().getSimpleName(), "send  task - end");

        } catch (Throwable t) {
            Toast.makeText(this, "Request failed: " + t.toString(),
                    Toast.LENGTH_LONG).show();
        }       
    }

编辑：日志中没有错误。现在的错误处理程序说“请求失败：org.json.JSONException：类型org.json.jsonArray的值无法转换为jsonobject”。

Answer 1

从您的网址中，数据是JSON数组。您正在尝试从JSONArray的String创建JSONObject。它不能以这种方式工作。改为创建一个JSONArray。

此外，仍然在您的网址中，您的json中没有任何关键字“帖子”。

Android，org.json.jsonarray无法转换为jsonobject

1 个答案: