Passing two parametes to asynctask method. how to?

Question

I'm designing an application that frequently communicates to a web server for updates. Communication happens only when user requests. I found AsyncTask could be helpful here. So I modified one class to serve my application as AsyncTask.

I want to pass an url and http post parameters to anysc class's doInBackground process. I can't figure out how to do it.

Here's it-

public class GetXMLFromServer extends
    AsyncTask< String, Void, String> {
private Context context;

GetXMLCallback gc = null;

ProgressDialog progressDialog;

public GetXMLFromServer(Context context, GetXMLCallback gc) {
    this.context = context;
    this.gc = gc;
    progressDialog = new ProgressDialog(this.context);
}

protected void onPreExecute() {
    progressDialog.setMessage("Fetching...");
    progressDialog.show();
}

@Override
protected void onPostExecute(String result) {
    gc.onSuccess(result);
    progressDialog.dismiss();
}


 @Override
protected String doInBackground(String... params) {
     String response = "";
    response=CustomHttpClient.executeHttpPost(params[0]);
    return null;
} 
    //Confused how to pass URL and http post parameters to doInBackground().
  }

I've one interface that is used to process response sent from onPostExecute(). It is as fallows.

   package com.project.main.external;

   public interface GetXMLCallback {
       void onSuccess(String downloadedString);
       void onFailure(Exception exception);
   }

And here is my main activity that calls for http response --

 public class UpdateList extends Activity implements GetXMLCallback { 
 //above line also throws error that interface methods are not implemented yet
 //they are (few lines below) defined.

private TextView textView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.list_layout);
    textView = (TextView) findViewById(R.id.TextView01);
}

GetXMLCallback gc = new GetXMLCallback() {

    public void onFailure(Exception exception) {

    }

    public void onSuccess(String downloadedString) {
        textView.setText(downloadedString);
    }

};

public void getUpdates(View view) {
    GetXMLFromServer task = new GetXMLFromServer(UpdateList.this, gc);
    task.execute(WebConstants.GET_UPDATES);
}
    }

Answer 1

AsyncTask does already allow more parameters:
In your case call it like this:

task.execute("parameter_one","parameter_two","parameter_three");

In doInBackground you can get them with:

params[0]
params[1]
params[2]

And so on

Just notice that all parameters must be of the same Type, in your case String.