Question

我有一个AsyncTask来从我服务器上的数据库中获取JSON数据。它运行正常，但有时失败，出现以下错误。这似乎发生在我保持应用程序空闲但打开一段时间然后提出请求时。

doInBackground方法

<?php

include ('db.php'); 

$sql = "SELECT id FROM users WHERE email = ?"."AND password = ?";

$stmt = $conn->prepare($sql);

$stmt->blind_param('ss',$_POST['email'],$_POST['password']);

$stmt->execute();

$stmt->blind_result($id);

if($stmt->fetch())
{
    echo 'loggin in';
} else {
    echo 'try again';
}

错误中的这一行

try {
            URL url = new URL(url_get_initial_posts);
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            OutputStream outputStream = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
            String data_string_language = URLEncoder.encode("selected_language","UTF-8")+"="+URLEncoder.encode(arg_language,"UTF-8")
                    +"&"+URLEncoder.encode("app_time","UTF-8")+"="+URLEncoder.encode(String.valueOf(arg_app_time),"UTF-8");
            bufferedWriter.write(data_string_language);
            bufferedWriter.flush();
            bufferedWriter.close();
            outputStream.close();

            InputStream inputStream = httpURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuilder stringBuilder = new StringBuilder();

            while ((JSON_INITIAL_POST = bufferedReader.readLine()) != null) {
                stringBuilder.append(JSON_INITIAL_POST + "\n");
            }
            bufferedReader.close();
            inputStream.close();
            httpURLConnection.disconnect();

            return stringBuilder.toString().trim();

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

指向

的链接

W/System.err:     at com.indiparent.android.indiparent.PostTab$BackgroundJSONPosts.doInBackground(PostTab.java:343)

错误

InputStream inputStream = httpURLConnection.getInputStream();

额外信息 - 这不是应用程序中唯一的Asynctask。其他活动和片段还有更多。例如 - 如果活动2的AsynckTask抛出此错误，那么如果我回到活动1，那么它的AsyncTask也不起作用。

我应该在这里或服务器端做些什么吗？感谢这里的任何帮助。

AsyncTask - java.net.SocketException：连接重置

0 个答案: