Null pointer exception while dealing with spinners

Question

I am getting a null pointer exception when i am running this peice of code

            private void loadSpinnerData() {
        // database handler
        AttendAppDatasource db = new AttendAppDatasource(getApplicationContext());

        // Spinner Drop down elements
        List<String> clas = db.viewCol(AttendAppDbOpenHelper.COLUMN_CLASS);
        Log.i("Select Class","List Assigned");
        // Creating adapter for spinner
        ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item, clas);

        // Drop down layout style - list view with radio button
        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        // attaching data adapter to spinner
        spinner.setAdapter(dataAdapter);
    }

this is the relevant log output

this is the log out put corresponding to the list

Answer 1

Your spinner is set to null. You need to get it from your resources

Spinner spinner = (Spinner) findViewById(R.id.'spinner_id_name');

Then you can set your adapter :)