通用AsyncTask类

Question

我已经制作了很多项目，并且对于每个web-serve，我都会创建一个AsyncTask类。如果我想从20个web-serve获取数据，那么我必须制作20个AsyncTask类。所以这不是使用能力代码。任何人都帮我创建一个Generic AsyncTask类，所以在整个项目中我只有一个AsyncTask类，我使用该类。

    public class HTTPAsyncTask extends AsyncTask<String, Void, String> {

    private CallBack mCb;
    HashMap<String, String> mData = null;
    List<NameValuePair> mParams= new ArrayList<NameValuePair>();
    String mTypeOfRequest;
    String mStrToBeAppended = "";
    boolean isPostDataInJSONFormat = false;
    JSONObject mJSONPostData = null;

    public HTTPAsyncTask(CallBack c, HashMap<String, String> data, JSONObject jsonObj, String request) {
        mCb = c;
        mTypeOfRequest = request;
        mJSONPostData = jsonObj;
        if((data != null) && (jsonObj == null)){
            mData = data;
            if(mTypeOfRequest.equalsIgnoreCase("GET")){
                Iterator<String> it = mData.keySet().iterator();
                while(it.hasNext()){
                    String key = it.next();
                    mParams.add(new BasicNameValuePair(key, mData.get(key)));
                }
                for (int i = 0; i<mParams.size()-1; i++){
                    mStrToBeAppended+= "?" + mParams.get(i).getName() + "=" + mParams.get(i).getValue() + "&"; 
                }
                //add the last parameter without the "&"
                mStrToBeAppended+= "?" + mParams.get(mParams.size()-1).getName() + "=" + mParams.get(mParams.size()-1).getValue();

            }

            if(mTypeOfRequest.equalsIgnoreCase("POST")){
                    Iterator<String> it = mData.keySet().iterator();
                    while(it.hasNext()){
                        String key = it.next();
                        mParams.add(new BasicNameValuePair(key, mData.get(key)));
                    }
            }

        }
        if ((mData == null) && (jsonObj != null)){
            isPostDataInJSONFormat = true;
        }

    }


    @Override
    protected String doInBackground(String... baseUrls) {

        publishProgress(null);
        if(mTypeOfRequest.equalsIgnoreCase("GET")){
            String finalURL = baseUrls[0]+ mStrToBeAppended;
             return HttpUtility.GET(finalURL);
        }

        if (mTypeOfRequest.equalsIgnoreCase("POST")){
            if(isPostDataInJSONFormat == false){
                return HttpUtility.POST(baseUrls[0],mParams );
            }
            else {
                return HttpUtility.POST(baseUrls[0], mJSONPostData);
            }

        }

        return null;

    }
    // onPostExecute displays the results of the AsyncTask.
    @Override
    protected void onPostExecute(String result) {
       mCb.onResult(result);


   }

    @Override
    protected void onProgressUpdate(Void...voids ) {
        mCb.onProgress();
   }