android网络超时异常

Question

我开发了安卓应用程序，并在三星标签2中测试。代码从托管在server.It works中的java服务器页面获取数据，但现在在urlConnection.getInputStream() .I期间显示网络超时异常，我的代码中没有任何变化。请帮我克服这个错误。

try {

     String tally_ipaddr="XXXXXXX";
     URL url = new URL(tally_ipaddr+"/Iplogin.jsp");
     urlConnection = (HttpURLConnection) url.openConnection();
     String line = "";       
     InputStreamReader isr = new InputStreamReader(urlConnection.getInputStream());
     BufferedReader reader = new BufferedReader(isr);
     StringBuilder sb = new StringBuilder();
     while ((line = reader.readLine()) != null){
       sb.append(line);
     }
 Toast.makeText(MyActivity.this, sb.toString(), Toast.LENGTH_LONG).show();
}
catch (Exception e)  {
   e.printStackTrace();
   Toast.makeText(MyActivity.this, e.toString(), Toast.LENGTH_LONG).show();
}

Answer 1

class UrlFetch extends AsyncTask<Void,Void,Void>
{

    @Override
    protected Void doInBackground(Void... params) {
        // TODO Auto-generated method stub


        try {

            String tally_ipaddr="XXXXXXX";

            URL url = new URL(tally_ipaddr+"/Iplogin.jsp");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);    // 5 seconds
            conn.setRequestMethod("GET");       
            conn.connect();
            BufferedReader rd  = new BufferedReader(new InputStreamReader(conn.getInputStream()));

            String line;
            while ((line = rd.readLine()) != null) {
                System.out.println(line);
            }

            conn.disconnect(); 
        }
        catch (Exception e)  {

            e.printStackTrace();
        }


        return null;
    }

}

并调用异步任务，如下所示

new UrlFetch().execute();

我希望上面的代码能为你工作

Answer 2

我注意到地址以"Iplogin.jsp“结尾。

确保服务器正在接受来自您设备的IP地址的连接。我认为您设备的IP地址已更改，服务器不再响应来自该设备的请求。

您可以从桌面浏览器访问该服务，但不能从设备浏览器访问，这一事实非常值得怀疑。