How can I write reusable classes to make http async requests?

Issue

I have a project where I want to write some functions that use internet service to get the data from the MySQL server. These functions are inside some non-activity classes. I intend to call these functions from different activities. I use AsyncTask to make HTTP requests. Following is the skeleton of my design.

public class MyLibrary{
    String myData;

    protected String getMyData(String param){
        HashMap<String, String> params = new HashMap<>();
        params.put("param1", apicall);
        params.put("param2", param);
        MyAsyncClass myAsyncClass = new MyAsyncClass(params);
        myAsyncClass.execute();

        /* Here after finishing the task I want to return the data to the caller */
        return myData;
    }

    private class MyAsyncClass extends AsyncTask<String, Integer, String> {
        MyAsyncClass(HashMap<String, String> params) {
            this.postData = params;
        }

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

        @Override
        protected String doInBackground(String... params) {
            RequestHandler requestHandler = new RequestHandler();
            return requestHandler.sendPostRequest(GlobalConstants.myurl, postData);
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            /* parse code here ... */
        }
    }
}

This class will be accessed by my activities like following.

public class SampleActivity extends AppCompatActivity{ 
    String returnedData;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        MyLibrary myLibraryObject = new MyLibrary();
        returnedData = myLibraryObject.getMyData("cih");

        /* do something with returnedData */
    }      

}

Any suggestions would be a huge help to me. As I am a novice, this might be a stupid question, but my concept is to reuse codes.

Solution

if your planning to do this asynchronous manner then you should use a interface as callback or u can get result by calling get method in AsyncTask

protected String getMyData(String param){
        HashMap<String, String> params = new HashMap<>();
        params.put("param1", apicall);
        params.put("param2", param);
        MyAsyncClass myAsyncClass = new MyAsyncClass(params);
       myData= myAsyncClass.execute().get();

        /* Here after finishing the task I want to return the data to the caller */
        return myData;
    }

Answered By - Geo