gistfile1.java

private void createDialog() {
    LayoutInflater infl = MainActivity.this.getLayoutInflater();
    View dialogView = infl.inflater(R.layout.dialog_layout, null);
        
    List<String> SpinnerArray =  new ArrayList<String>();
    SpinnerArray.add("what ever it is you want");
    SpinnerArray.add("what ever it is you want");
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, SpinnerArray);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    
    Spinner sp = (Spinner) dialogView.findViewById(R.id.spinner01);
    sp.setAdapter(adapter);
    
    AlertDialog.Builder aBuilder = new AlertDialog.Builder(MainActivity.this);
    aBuilder.setView(dialogView);
    aBuilder.setPositiveButton(...);
    aBuilder.setNegativeButton(...);
    
    aBuilder.create().show();
}