How to create a AsyncTask that is in it's own class

asynctask.java

//Create an interface called AsyncResponse, AsyncResponse.java
public interface AsyncResponse {
    void processFinish(String response);
}

// In the MainActivity.java override processFinish
// In processFinish put everything that you want to happen when you get a response from the AsyncTask
public class MainActivity extends Activity implements AsyncResponse {
    
  protected void onCreate() {
      MyAsyncTask myAsyncTask = new MyAsyncTask(this);
      myAsynchTask.execute(URL);
    
  @Override
  public void processFinish(String response) {
    // use the response and do whatever UI updates you want here. 
  }
}


//Create a separate file/class for your AsyncTask, MyAsyncTask.java
public class MyAsyncTask extends AsyncTask<URL, Void, String> {

    // Set up the delegate
    public AsyncResponse delegate = null;

    public MyAsyncTask(AsyncResponse delegate) {
        this.delegate = delegate;
    }


    @Override
    protected String doInBackground(URL... params) {
      URL url = params[0];
        String result = url.itString();
        return result;
    }

    @Override
    protected void onPostExecute(String result) {

        System.out.println("result from download (MyAsyncTask): " + result);
        delegate.processFinish(result);
    }
}