How to return ArrayList from AsyncTask to another class?

Question

i want to get Ftp folders list from server using AsyncTask and return folders names ArrayList to main class and update spinner adapter.

In main class i got spinner with

Answer 1

-- PSEUDO CODE --

Create a custom interface as followed:

public interface IAsyncTask {

    void IAmFinished(ArrayList<Object> arrayList);

}

Add a constructor to your AsyncTask:

private IAsyncTask asyncTaskListener;

public MyAsyncTask(IAsyncTask asyncTaskListener){
     this.asyncTaskListener = asyncTaskListener;
}

In your PostExecute of the AsyncTask:

public void onPostExecute(List<String> list) {
    asyncTaskListener.IAmFinished(list);
}

In your Activity that starts your AsyncTask:

MyAsyncTask asyncTask = new MyAsyncTask(this);
asyncTask.execute(..);

Implement the interface:

public class MyActivity implements IAsyncTask

Implement the method:

public void IAmFinished(ArrayList<Object> list){
    // Do whatever you want with your returned object
}