Question

我知道有很多类似意图的问题，但我没有找到任何可以解决这个错误的答案问题：我想从我的Android应用程序访问.net webservice，我收到此错误。 UnknownHostException：主机未解析：webadress.com：80 早些时候我在模拟器上尝试这个，但现在甚至在设备上也得到了相同的错误.... 伙计们帮我解决问题

ma代码是：

public class FirstAppUI extends Activity {


    private static final String NAMESPACE = "http://tempuri.org/";

    private static final String URL = 

//"http://192.168.41.201:52002/WebServiceAvail/Service.asmx";


"http://nautilussoft.biz.whbus12.onlyfordemo.com/staging/litigation/litwebservice.asmx";    


    private static final String SOAP_ACTION = "http://tempuri.org/";

    private static final String METHOD_NAME = "GetUserByUserName(a,10)";



   /** Called when the activity is first created. */

  @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        TextView tv= (TextView)findViewById(R.id.TextView01);

        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME); 

        SoapSerializationEnvelope envelope = 

            new SoapSerializationEnvelope(SoapEnvelope.VER11); 

        envelope.setOutputSoapObject(request);


        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
        try {
            //Toast.makeText(getBaseContext(), "received object", Toast.LENGTH_SHORT).show();
            androidHttpTransport.call(SOAP_ACTION, envelope);
            SoapObject resultsRequestSOAP = (SoapObject) envelope.bodyIn;
            //Toast.makeText(getBaseContext(), "received object", Toast.LENGTH_SHORT).show();
            tv.setText("Received :" + resultsRequestSOAP.toString());
        } catch (MalformedURLException e) {
            e.printStackTrace();
            Log.e("APP", "MalformedURLException while sending\n" + e.getMessage());
            tv.setText("Malformedexception"+e);
        }
        catch(Exception e1)
        {tv.setText("exception"+e1);}



    }
}

Answer 1

无法访问主机或信息所在的服务器，因此您收到此错误。这可能是由于各种原因，例如您没有连接到Internet，并且在尝试连接到服务器时连接丢失并且URL可能是错误的。

如果您在浏览器中收到来自您的网络服务的回复消息，则应用程序中存在问题，否则网络连接出现问题。

Answer 2

使用“http://www.tempuri.org/”;取代“http://tempuri.org/”;

Answer 3

“就像你没有连接到互联网一样，尝试连接服务器时连接丢失了，网址也可能出错。”

请检查模拟器中的互联网连接

UnknownHostException：主机未解析

3 个答案: