android.os.NetworkOnMainThreadException例外尝试从我的Andr​​oid的Java应用程序调用web服务？

问题描述

喜是新的Andr​​oid java开发，并想从我的Andr​​oid的Java应用程序调用Java web服务。当我试图运行该应用程序我得到一个例外，它说android.os.NetworkOnMainThreadException。我不知道为什么这个错误..？反正我坚持了这个错误。我曾经用Google搜索这个有很多，但无法找到一个确切的solution..can有人plz帮助..？我的code以下片断。

Hi am new to Android java development and am trying to call a java webservice from my android java application. When am trying to run this application am getting one exception which says android.os.NetworkOnMainThreadException. I didn't know why this error..?? anyway am stuck with this error. I had googled for this a lot but can't find an exact solution..can anyone plz help..?my code snippet below.

        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
        envelope.setOutputSoapObject(request);
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
        androidHttpTransport.call(SOAP_ACTION,envelope);
        SoapObject so = (SoapObject)envelope.bodyIn;

完成调试，我认为code androidHttpTransport.call（SOAP_ACTION，信封），这些行后;
            SoapObject所以=（SoapObject）envelope.bodyIn; 正在的问题。
在code envelope.bodyIn 给我一个空值。

After done the debugging i think these lines of code androidHttpTransport.call(SOAP_ACTION,envelope); SoapObject so = (SoapObject)envelope.bodyIn; is making problems.The code envelope.bodyIn giving me a null value.

推荐答案

您可以使用AsyncTask的，这将prevent创建您自己的线程的麻烦。使doInBackground方法网络呼叫

You can use the AsyncTask, which will prevent the hassle of creating your own thread. Make network call in doInBackGround method

code

 public void onClick(View v) {
    new DownloadImageTask().execute(data);
 }
 class Data {
      String namespace;
      String method;
 }

 private class DownloadImageTask extends AsyncTask<data, Void, SoapObject> {

 protected SoapObject doInBackground(Data... data) {
    //make your network call and return SoapObject
 }


protected void onPostExecute(SoapObject obj) {
    //process the Soap Object returned
}
}

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