Question

我正在尝试从服务器检索一行。

我收到以下错误。

日志

E/log_tag(1948): connection success [sendernumber=9040307070]
E/log_tag(1948): result ?9545357470[{"TaskId":"1"},{"TaskId":"2"}]
E/log_tag(1948): Error parsing data org.json.JSONException: Value 9040307070 of type java.lang.Long cannot be converted to JSONArray

JSON代码

     String result = null;
    InputStream is = null;
    try{
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://www.mydomainname.org/task/senttask.php");
            ArrayList<NameValuePair>  nameValuePairs = new ArrayList<NameValuePair>();

            nameValuePairs.add(new BasicNameValuePair("sendernumber",name.toString()));
            //nameValuePairs.add(new BasicNameValuePair("sendernumber","9595959595"));
             httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = httpclient.execute(httppost); 

            HttpEntity entity = response.getEntity();
            is = entity.getContent();

            Log.e("log_tag", "connection success "+nameValuePairs);

    }
    catch(Exception e)
    {
            Log.e("log_tag", "Error in http connection "+e.toString());
            Toast.makeText(getActivity(), "Connection fail", Toast.LENGTH_SHORT).show();

    }
    try
    {
            BufferedReader reader = new BufferedReader(new InputStreamReader(is,HTTP.UTF_8),8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) 
            {
                    sb.append(line + "\n");

            }
            is.close();

            result=sb.toString();
          Log.e("log_tag", "result "+result.toString());
    }
    catch(Exception e)
    {
           Log.e("log_tag", "Error converting result "+e.toString());
        Toast.makeText(getActivity(), " Input reading fail", Toast.LENGTH_SHORT).show();

    }
    try
    {
        JSONArray jArray = new JSONArray(result);
          String s="",s1,s2,s3,s4,s5;
          Log.w("Lengh",""+jArray.length());
            for(int i=0;i<jArray.length();i++){

                JSONObject json_data = jArray.getJSONObject(i);

                  s=json_data.getString("TaskId");

                   Log.e("taskid from server","s");

            }



    }
    catch(JSONException e)
    {
            Log.e("log_tag", "Error parsing data "+e.toString());
            Toast.makeText(getActivity(), "JsonArray fail", Toast.LENGTH_SHORT).show();
    }

服务器上的表格

 TaskId int primary key
 sendernumber varchar(100)

Answer 1

如果您希望它简单有效，请使用JSONArray jArray = new JSONArray(result.substring(result.indexOf("[")));代替JSONArray jArray = new JSONArray(result);

但是，您的网络服务似乎有些问题。它正在返回9545357470[{"TaskId":"1"},{"TaskId":"2"}]，而且真的应该是[{"TaskId":"1"},{"TaskId":"2"}]。因此，当您尝试创建json数组以将其作为响应发送时，我不确定究竟发生了什么，但最好的解决方案是修复它而不是此处的代码。

从json中检索会给android带来错误

1 个答案: