What is the best way for AsyncTask to notify parent Activity about completion?

Question

public class ListingFoundBeaconService 
                    extends AsyncTask {

    public ListingFoundBeaconService(Context contextGi         


        

Answer 1

Best way is to call delegate. In your AsyncTask class make a constructor and have a delegate

Delegate interface:

public interface TaskDelegate {
    public void taskCompletionResult(String result);
}

now in AsyncTask:

private TaskDelegate delegate;

public ListingFoundBeaconService(Context contextGiven, 
                                 JSONObject jsonParams,
                                 TaskDelegate delegate) {
    this.contextGiven = contextGiven;
    this.jsonParams = jsonParams;
    this.delegate = delegate;
}

on postExecute:

delegate.taskCompletionResult(result/msg/json);

In your main class implement TaskDelegate and implemented a method which is called when the task completed.

Answer 2

Make the ListingFoundBeaconService class abstract and then override onPostExecute in the calling class.