Return value from AsyncTask class onPostExecute method

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南笙
南笙 2020-11-27 05:50

Ok so now I have Class A that contains some spinners that values will be populated by Class B that extends AsnycTask which grabs the s

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  •  爱一瞬间的悲伤
    2020-11-27 06:28

    I guess you are trying to read class A variable before it is being set.. Try to do it using callbacks..in the callback function pass the values and refresh your spinners..

    You can create interface, pass it to AsyncTask (in constructor), and then call method in onPostExecute

    For example:

    Your interface:

    public interface OnTaskCompleted{
        void onTaskCompleted(values);
    }
    

    Your Activity:

    public YourActivity implements OnTaskCompleted{
        //your Activity
        YourTask  task = new YourTask(this); // here is the initalization code for your asyncTask
    }
    

    And your AsyncTask:

    public YourTask extends AsyncTask{ //change Object to required type
        private OnTaskCompleted listener;
    
        public YourTask(OnTaskCompleted listener){
            this.listener=listener;
        }
    
        //required methods
    
        protected void onPostExecute(Object o){
            //your stuff
            listener.onTaskCompleted(values);
        }
    }
    

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