Java Android IO异常-没有此类文件或目录

我正在将我的Android应用程序与webservice.asmx连接。。。 我得到一个类似IOException的错误，没有这样的文件或目录。我在下面给出我的代码。。我收到祝酒词“请稍后再试”，所以发生了一般性异常

webserviceCallButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            new login().execute();
        }
    });
}

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

    private final ProgressDialog dialog = new ProgressDialog(Sample1_Page.this);

    @Override
    protected void onPreExecute() {
        this.dialog.setMessage("Loading data");
        this.dialog.show();
    }

    @Override
    protected Void doInBackground(Void... unused) {
        final String NAMESPACE = "https://xxx.xxxx.com/";
        final String URL = "https://xxx.xxxx.xxx.com/appservice/d_service.asmx";
        final String SOAP_ACTION = "https://xxxx.xxx.com/mLo";
        final String METHOD_NAME = "mLo";

        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

        request.addProperty("userid", userid);
        request.addProperty("password", password);


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

        envelope.setOutputSoapObject(request);
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
        androidHttpTransport.debug = true;

        try {
            androidHttpTransport.call(SOAP_ACTION, envelope);
            SoapPrimitive response = (SoapPrimitive) envelope.getResponse();

            String responseJSON=response.toString();
            JSONArray jarray =new JSONArray(responseJSON);

            Name=jarray.getJSONObject(0).getString(TAG_NAME);
            Id=jarray.getJSONObject(0).getString(TAG_ID);

            System.out.println(request);
            System.out.println(responseJSON);
        }
        catch(SocketTimeoutException e){
            timeoutexcep=true;
            e.printStackTrace();
        }
        catch(UnknownHostException e){
            httpexcep=true;
            e.printStackTrace();
        }
        catch (Exception e) {
            genexcep=true;
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        if (this.dialog.isShowing()) {
            this.dialog.dismiss();
        }
        if(timeoutexcep){
            Toast.makeText(Sample1_Page.this, "Unable to connect to server, Please try again later",Toast.LENGTH_LONG).show();
        }
        else if(httpexcep){
            Toast.makeText(Sample1_Page.this, "Please check your Internet connection",Toast.LENGTH_LONG).show();
        }
        else if(genexcep){
            Toast.makeText(Sample1_Page.this, "Please try later",Toast.LENGTH_LONG).show();        
        }
        else{
            tableview();
        }

        timeoutexcep=false;
        httpexcep=false;
        genexcep=false;
    }    

    public void tableview(){
        try{
            TextView webserviceResponse = (TextView) findViewById(R.id.textView1);
            webserviceResponse.setText(Name);
        }
        catch(Exception e){
        }
    }
}

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你能给我看一下你的清单权限吗

你必须有这个权限。如果没有，则添加此项

android.permission.WRITE_EXTERNAL_STORAGE

---

还要检查web服务的协议，是https还是http？尝试使用服务器的ip地址。它可能会对您有所帮助。

将您的url更改为

https://xxx.xxxx.xxx.com/appservice/d_service.asmx/ 

然后再试一次，可能会有帮助。您可以只使用url中的控制器名称再试一次吗，省略扩展部分。我是用servlet做的。@csuman。。。哪一个是控制器名称？“您可以在评论中说明这一点，我不明白为什么您要求写入storageweb服务协议的权限是httpsI没有授予外部存储权限这是一个IO例外，因此会有与环境相关的IO权限或根访问权限来执行此类命令，也许超级用户权限有帮助。@Pankaj。。。超级用户权限，，，Means

android.permission.WRITE_EXTERNAL_STORAGE