@Override error after adding public interface OnTaskCompleted

Issue

I'm trying to get a response back from my public class saveData extends AsyncTask. I added a public interface but the Android Studio gives me an error for the @Overide on my onCreate in the activity.

public class almostFinish extends Activity implements OnTaskCompleted{

    @Override // here I get an Error
    protected void onCreate(Bundle savedInstanceState) {}

    @Override
    public void onTaskCompleted(boolean result) {
    //ToDo
    }
}

My interface.

public interface OnTaskCompleted {
    void onTaskCompleted(boolean isSuccess);
}

My AsyncTask class

public class saveData extends AsyncTask<List<String>, Void, Void> {
    private OnTaskCompleted listener;
    boolean myflag = false;

    @Override
    public void onPreExecute() {}

    @Override
    protected Void doInBackground(List<String>... params) { }

    @Override
    public void onPostExecute(Void result) {
        // TODO Auto-generated method stub
        super.onPostExecute(result);        
        listener.onTaskCompleted(myflag);       
    }
}

Thanks for any help.

I'm just getting an Error in the editor: "Annotations are not allowed here" If I remove the @Override then I get an Error telling me to add @Override.

Solution

1. According this code you will get null pointer exception. because you have not assign the listener in code.

   public class saveData extends AsyncTask < List < String > , Void, Void > {
       private OnTaskCompleted listener;
       boolean myflag = false;
   
       @Override
       public void onPreExecute() {}
   
       @Override
       protected Void doInBackground(List < String > ...params) {}
   
       @Override
       public void onPostExecute(Void result) {
           super.onPostExecute(result);
           onTaskCompleted(myflag);
       }
   }
   

Answered By - Tabassum Latif