Android中的网络超时错误

Question

我正在使用以下代码从网络获取数据，但它总是能够提供帮助。任何人都可以帮助我

公共类NetworkManager {

public NetworkManager(){

}

public static String WebQuery(String urlstring)
{
    String resultToDisplay = "";    
    InputStream in = null;
    try {

        URL url = new URL(urlstring);
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        in = new BufferedInputStream(urlConnection.getInputStream());
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        resultToDisplay = reader.readLine();
//bitmap = BitmapFactory.decodeStream(in);
    }
    catch(Exception e){
        resultToDisplay = "";
        System.out.println(e.getMessage());
    }
    return resultToDisplay;
 }    

}