[Solved] @Override error after adding public interface OnTaskCompleted

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  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);
    }
}

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solved @Override error after adding public interface OnTaskCompleted