Android的，的AsyncTask与kSoap2 [英] Android, AsyncTask with kSoap2

问题描述

我编码主要使用从Web服务得到数据的应用程序，我想使用的AsyncTask运行在后台的SOAP调用......我是相当新的安卓（即在iOS程序员）所以我有点在这个新的...

I'm coding an app that primarily uses data gotten from a web service, and I want to use AsyncTask to run the SOAP calls in the background... I'm fairly new to Android(being an iOS programmer), so I'm a bit new at this...

现在，我有一个登录界面，在这里我把用户提供的登录名和检查对信息的服务器上...

Now, I have a login screen, where I take a user-provided login and check it against information on a server...

因此​​，在我登录活动：

So in my login activity:

    loginBtn.setOnClickListener(new OnClickListener()
    {
        public void onClick(View v)
        {
            //Run the connection to authenticate the user
            AuthenticateConnection mAuth = new AuthenticateConnection();

            mAuth.mNumber = number;
            mAuth.mPassword = pass;

            mAuth.connection();
        }
    }

和我的皂类是这样的：

public class AuthenticateConnection
{
    private static final String SOAP_ACTION = "http://tempuri.org/Authenticate";
    private static final String METHOD_NAME = "Authenticate";
    private static final String NAMESPACE = "http://tempuri.org/";
    private String URL;

    public Boolean userOK;

    public String mNumber;
    public String mPassword;

    public AuthenticateConnection()
    {

    }

    public void connection()
    {
        Singleton service = Singleton.getInstance();
        String firstURL = service.getURL();
        URL = firstURL + "Parent.svc";

        System.out.println("Connection to: " + URL);

        //Initialize soap request
        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

        //Add parameters
        request.addProperty("login", mNumber);
        request.addProperty("password", mPassword);

        //Declare the version of the SOAP request
        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);

        envelope.dotNet=true;
        envelope.implicitTypes=true;
        envelope.setAddAdornments(false);

        //Prepare request
        envelope.setOutputSoapObject(request);

        //Needed to make the internet call
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

        //Allow for debugging - needed to output the request
        androidHttpTransport.debug = true;

        try 
        {
            //this is the actual part that will call the web service
            androidHttpTransport.call(SOAP_ACTION, envelope);

            //Get the SoapResult from the envelope body.
            //Object result = envelope.getResponse();
            //Object result = envelope.bodyIn;
            SoapObject sResult = (SoapObject)envelope.bodyIn;

            String tempID = sResult.getProperty("AuthenticateResult").toString();

            //Check if the user exists and has the correct password
            if(tempID != "-1")
            {
                userOK = true;

                //Store the values in the singleton class
                service.parentID = sResult.getProperty("AuthenticateResult").toString();
                service.parentToken = sResult.getProperty("token").toString();
            }

            //If -1 is returned, then either the number or the password is incorrect
            else
            {
                userOK = false;
            }           
        } catch(org.xmlpull.v1.XmlPullParserException ex2)
        {               
            //System.out.println(androidHttpTransport.requestDump.toString());

        }  catch (Exception e)
        {
            e.printStackTrace();
            System.out.println(androidHttpTransport.requestDump.toString());
        }
    }
}

所以我的问题是，我将如何做到这一点与AsyncTask的？ 我一直在看有关AsyncTask的一些教程，但还没有真正得到它迄今为止...

So my question is, how would I do this with AsyncTask? I've been looking at some tutorial on AsyncTask, but haven't really "gotten it" so far...

推荐答案

您可以做的：

private class ConnectionTask extends AsyncTask<String, Void, Void> {
    private ProgressDialog dialog = new ProgressDialog(ACTIVITY_NAME.this);

    protected void onPreExecute() {
        dialog.setMessage("Connecting...");
        dialog.show();
    }

    protected void doInBackground(String... args) {
        AuthenticateConnection mAuth = new AuthenticateConnection();
        mAuth.mNumber = args[0];
        mAuth.mPassword = args[1];
        mAuth.connection();
    }

    protected void onPostExecute(Void v) {
        if (dialog.isShowing()) {
            dialog.dismiss();
        }
    }
}

然后调用它：

And then call it:

loginBtn.setOnClickListener(new OnClickListener()
{
    public void onClick(View v)
    {
        //Run the connection to authenticate the user
        new ConnectionTask().execute(number, pass);
    }
}

您连接方法 AuthenticateConnection 应该返回的东西，以确保用户已通过验证。然后你就可以使用该值的 onPostExecute ，是这样的：

Your connection method in AuthenticateConnection should return something to ensure the user has been authenticated. Then you can use that value in the onPostExecute, something like this:

    protected void onPostExecute(Integer res) {
        if (dialog.isShowing()) {
            dialog.dismiss();
        }
        if (res.intValue() == OK) {
            /* Maybe start a new Activity ...*/
        } else {
            /* Maybe show a Toast with an error message ...*/
        }
    }

在这种情况下，的AsyncTask的签名将改变： 私有类ConnectionTask扩展的AsyncTask＆LT;字符串，太虚，整数GT; 和doInBackground应返回一个整数。

In this case the signature of the asynctask will change: private class ConnectionTask extends AsyncTask<String, Void, Integer> and the doInBackground should return an Integer.

希望它帮助。

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