0

我是 android 编程的新手（第一个项目），我需要帮助来使我的代码正常工作......好的，所以我有一个方法可以调用 web 服务并从那里获取字符串。它正在处理 avd（在 2.2 上）

这是代码：

public void NewCall(int Position)
{
    String SOAP_ACTION = "http://tempuri.org/";
    String NAMESPACE = "http://tempuri.org/";
    String METHOD_NAME = "";
    String URL = "http://test.com/Service1.asmx?WSDL";

    if(Position == 0)
    {
        SOAP_ACTION += "Method1";
        METHOD_NAME = "Method1";
    }
    else if(Position == 1)
    {
        SOAP_ACTION += "Method2";
        METHOD_NAME = "Method2";
    }
    else if(Position == 2)
    {
        SOAP_ACTION += "Method3";
        METHOD_NAME = "Method3";
    }
    else if(Position == 3)
    {
        SOAP_ACTION += "Method4";
        METHOD_NAME = "Method4";
    }

    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

    envelope.setOutputSoapObject(request);
    envelope.dotNet = true;

    try 
    {
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
        androidHttpTransport.call(SOAP_ACTION, envelope);
        SoapObject result = (SoapObject)envelope.bodyIn;

        if(result != null)
        {
            String textRez = result.getProperty(0).toString();

            addRow(textRez); //method for inserting new row in the database

        }
    } 
    catch (Exception e) 
    {
        e.printStackTrace();
    }
}

但是正如我所读到的，您不能在 android 3.0+ 的“主线程”中执行此操作，作为解决方案，我看到您可以使用AsyncClass. 关于这一点，我尝试将我找到的示例与我的代码结合起来，但它还没有给我结果......我认为我需要将位置作为整数解析为 AssyncClass，执行所需的代码doInBackground，然后我需要将结果作为字符串。我试图创作类似这样的东西，但它没有给我成功......

因此，如果你们中的某个人可以帮助/指导我解决这个问题，我将不胜感激。

谢谢 。

编辑：这就是我尝试使用 AsyncClass 的方式：

private class wsGet extends AsyncTask<String, Void, String>
{

    @Override
    protected String doInBackground(String... params) {
    int Position = Integer.parseInt(params[0]); 
    String SOAP_ACTION = "http://tempuri.org/";
    String NAMESPACE = "http://tempuri.org/";
    String METHOD_NAME = "";
    String URL = "http://test.com/Service1.asmx?WSDL";


    if(Position == 0)
    {
        SOAP_ACTION += "Method1";
        METHOD_NAME = "Method1";
    }
    else if(Position == 1)
    {
        SOAP_ACTION += "Method2";
        METHOD_NAME = "Method2";
    }
    else if(Position == 2)
    {
        SOAP_ACTION += "Method3";
        METHOD_NAME = "Method3";
    }
    else if(Position == 3)
    {
        SOAP_ACTION += "Method4";
        METHOD_NAME = "Method4";
    }

        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

        envelope.setOutputSoapObject(request);
        envelope.dotNet = true;

        try 
        {
            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
            androidHttpTransport.call(SOAP_ACTION, envelope);
            SoapObject result = (SoapObject)envelope.bodyIn;

            if(result != null)
            {
                tekstRez = result.getProperty(0).toString();

            }
        } 
        catch (Exception e) 
        {
            e.printStackTrace();
        }

        return tekstRez;
    }

然后为了调用它，我尝试了：

public void NewTenders(int Pos)
{
    String Position = String.valueOf(Pos);

    String[] params= {Position}; //to pass to doInBackground

    //Pass your args array and the current activity to the AsyncTask    

    String tekst = "";
    try {
        tekst = new wsGet().execute(params).get();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ExecutionException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }addRow(tekst);

虽然，它对我不起作用......

4

2 回答 2

1

从 android 3.0+ 你不能从主线程调用 web 服务。将整个代码写在DoInBackground你的AsyncClass.

AsyncClass 不能将值返回给调用类。这里return将值传递给onPostExecute. 在 AsyncClass 中使用以下函数

protected void onPostExecute(String result) 
{
//from here you have to pass your value to your main class
}
于 2013-06-05T12:04:30.177 回答
0

或者您可以将此行添加到您正在调用网络服务的活动中

    if (android.os.Build.VERSION.SDK_INT > 9) {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }

就在 setContentView() 之后，这应该可以解决问题

于 2015-05-22T12:03:23.857 回答