AsyncTask Class to Call multiple service

AsyncHelper.java

import android.app.Activity;
import android.os.AsyncTask;
import android.util.Log;


import com.google.gson.Gson;
import com.hestabit.rqchat.connect.Connect;
import com.hestabit.rqchat.models.SignUp;

import org.apache.http.NameValuePair;
import org.json.JSONObject;

import java.io.Reader;
import java.util.List;

/**
 * Created by piyus_000 on 6/15/2015.
 */
public class AsyncHelper extends AsyncTask<List<NameValuePair>,Void,JSONObject> {
    Activity activity;
    String methodName;
    List<NameValuePair> params;
    OnAsyncRequestComplete onAsyncRequestComplete;
    public AsyncHelper(Activity activity, String methodName){
        this.activity=activity;
        this.methodName=methodName;
        onAsyncRequestComplete=(OnAsyncRequestComplete)activity;
    }

    // Interface to be implemented by calling activity
    public interface OnAsyncRequestComplete {
        public void asyncResponse(JSONObject response);
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected JSONObject doInBackground(List<NameValuePair>... params) {
        Connect connect = Connect.getInstance(activity);
        Gson gson=new Gson();
        JSONObject jsonObject = connect.getCorrectMethod(methodName, params[0]);
        return jsonObject;
    }

    @Override
    protected void onPostExecute(JSONObject jsonObject) {
        super.onPostExecute(jsonObject);
        onAsyncRequestComplete.asyncResponse(jsonObject);
    }
}