How do I use Context in the nested static class below without memory leak or Attempt to invoke virtual method on a null object reference exception?

Question

I want to use Context in the static class below in the do in background method. I have tried parsing context in the constructor and also creating an instance of the class but every time I get this error : Attempt to invoke virtual method java.io.File android.content.Context.getCacheDir() on a null object reference

     public static class PopulateDbAsyncTask extends AsyncTask<Void, Void, 
      Void> {
        private PicDao picDao;
        Context context;

        public PopulateDbAsyncTask(PictureDataBase db, Contex context) {
            picDao = db.picDao();
            this.context = context;

        }

        @Override
        protected Void doInBackground(Void... voids) {
            RequestQueue mRequestQueue = Volley.newRequestQueue(context);
            return null;
         }
}

Your `context` is null until you initialize it. You'll have to pass your current Context into a constructor. — Michael A. Schaffrath, Jun 19 '19 at 07:20
@MichaelA.Schaffrath that's what I said in my question. I have tried that but still the same null error. — , Jun 19 '19 at 07:22

score 1 · Answer 1 · answered Jun 19 '19 at 07:41

1

Make sure you pass not null context value into the constructor. Use Application context for this purpose.

answered Jun 19 '19 at 07:41

Crain

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How do I use Context in the nested static class below without memory leak or Attempt to invoke virtual method on a null object reference exception?

1 Answers1