Question

我的目标是从Android设备调用.Net webservice（.asmx）。

.Net Webservice使用.net测试客户端并使用SOAPUI应用程序进行测试。

我正在使用Eclipse构建android应用程序 - 包括用于webservice调用的KSOAP2项目。应用程序的android.permission.INTERNET标记包含在用户权限部分中。

我有两个问题 [1]如果我从onCreate()（下面的代码）调用webservice方法，应用程序抛出“android.os.NetworkOnMainThreadException”错误（我在互联网上看到的许多例子都是相同的方法，但我不知道为什么它在我的项目中失败了）

[2]为了解决上述问题，我在“MainActivity”中创建了一个类，但现在我在client.execute("some text as input")行上收到“源未找到”消息（检查构建路径，有对KSOAP2 jar文件的引用，没有编译错误）

正确的方法是什么，如何解决这个问题？谢谢你的帮助

[问题1]的代码

    //This code for calling .net webservice from Android devide.. and throws "android.os.NetworkOnMainThreadException" whilst calling.

    package com.example.wsclient;

    import org.ksoap2.SoapEnvelope;
    import org.ksoap2.serialization.SoapObject;
    import org.ksoap2.serialization.SoapSerializationEnvelope;
    import org.ksoap2.transport.HttpTransportSE;

    import android.os.Bundle;
    import android.app.Activity;
    import android.app.AlertDialog;
    import android.view.Menu;
    import android.widget.TextView;

    public class MainActivity extends Activity {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            String SOAP_ACTION = "http://mycomp.org/GetParticipantVote";
            String METHOD_NAME = "GetParticipantVote";
            String NAMESPACE = "http://mycomp.org/";
            String URL = "http://10.0.2.2:8080/WSRating.asmx";

            try {
                SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
                request.addProperty("sID", "My_name");
                request.addProperty("sRate", "9");

                SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                envelope.dotNet=true;

                envelope.setOutputSoapObject(request);
                HttpTransportSE  androidHttpTransport = new HttpTransportSE (URL);
                androidHttpTransport.call(SOAP_ACTION, envelope);
                SoapObject result=(SoapObject)envelope.getResponse();

                //To get the data.
                String resultData=result.getProperty(0).toString();

                AlertDialog alertDialog = new AlertDialog.Builder(this).create();
                alertDialog.setTitle("Webservice Client");
                alertDialog.setMessage("Webservice Resp : " +  resultData);
                alertDialog.show();

            }
            catch (Exception eE) {

                AlertDialog alertDialog1 = new AlertDialog.Builder(this).create();
                alertDialog1.setTitle("Webservice Client");
                alertDialog1.setMessage("Error : " +  eE.getMessage());
                alertDialog1.show();
           }
        }
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            getMenuInflater().inflate(R.menu.activity_main, menu);
            return true;
        }
    }

[问题2]的代码 -

            package com.example.wsclient;

            import org.ksoap2.SoapEnvelope;
            import org.ksoap2.serialization.SoapObject;
            import org.ksoap2.serialization.SoapSerializationEnvelope;
            import org.ksoap2.transport.HttpTransportSE;

            import android.os.Bundle;
            import android.app.Activity;
            import android.app.AlertDialog;
            import android.view.Menu;
            import android.widget.TextView;

            public class MainActivity extends Activity {
                @Override
                public void onCreate(Bundle savedInstanceState) {
                    super.onCreate(savedInstanceState);

                    CallWS client = new CallWS();
                    client.execute("some text as input");

                }
                @Override
                public boolean onCreateOptionsMenu(Menu menu) {
                    getMenuInflater().inflate(R.menu.activity_main, menu);
                    return true;
                }

                    /* AsyncTask class to remove android.os.NetworkOnMainThreadException error */
                    private class CallWS extends AsyncTask<String, Integer, String> {

                         protected String doInBackground(String... sValues) {

                                String resultData;

                                String SOAP_ACTION = "http://mycomp.org/GetParticipantVote";
                                String METHOD_NAME = "GetParticipantVote";
                                String NAMESPACE = "http://mycomp.org/";
                                String URL = "http://10.0.2.2:8080/WSRating.asmx";

                                try {
                                    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
                                    request.addProperty("sID", "My_name");
                                    request.addProperty("sRate", "9");

                                    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                                    envelope.dotNet=true;

                                    envelope.setOutputSoapObject(request);
                                    HttpTransportSE  androidHttpTransport = new HttpTransportSE (URL);
                                    androidHttpTransport.call(SOAP_ACTION, envelope);
                                    SoapObject result=(SoapObject)envelope.getResponse();

                                    //To get the data.
                                    resultData =result.getProperty(0).toString();
                                }
                                catch (Exception eE) {
                                    resultData = "Error : " +  eE.getMessage();
                               }

                               return resultData
                         }

                         protected void onProgressUpdate(Integer... values) {

                         }

                         protected void onPostExecute(String result) {
                             // do something here to display the result...
                         }
                     }

                     }

Answer 1

我最好的猜测是你在ICS上测试这个解决方案。

您可以快速测试使用Strick模式：http://developer.android.com/reference/android/os/StrictMode.html。

在ICS中禁止在UI上执行所有网络操作，这就是为什么需要重建它以使用AsyncTasks http://developer.android.com/reference/android/os/AsyncTask.html。

Answer 2

您无法在主线程上执行网络操作。结帐
http://developer.android.com/reference/android/os/AsyncTask.html

Answer 3

只需使用以下代码覆盖......

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder（）。permitAll（）。build（）; StrictMode.setThreadPolicy（政策）;

并且还使用......

Android - 具有android.os.NetworkOnMainThreadException错误的Webservice客户端

3 个答案: