By all means this is a very basic question what i am about to ask. I have a spinner which i am populating using an array list and its working fine but i want to add a constant string at the first position of my spinner for instance "Select service" should be my first elemnent how can i do this.Any help is appreciated.Thank you.
ArrayAdapter<String> adapter =new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_spinner_item,ar1);
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            spin_dept.setAdapter(adapter);
             spin_dept.setOnItemSelectedListener(new OnItemSelectedListener() 
                {
                    @Override
                    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) 
                    {
                        ((TextView) parent.getChildAt(0)).setTextColor(Color.RED);
                        ((TextView) parent.getChildAt(0)).setTextSize(13);
                        name = spin_dept.getSelectedItem().toString();
                        Log.d("NAME",name);
                        Id = spinnerMap.get(name);
                         Log.d("ID",Id);
                         new LongOperation1().execute();
                    }
above is the code where I am populating the spinner
 
     
    