MultiAutoCompleteTextView mactv = (MultiAutoCompleteTextView) this
                .findViewById(R.id.ccmactv);
ArrayAdapter<String> aa2 = new ArrayAdapter<String>(this,
                android.R.layout.simple_dropdown_item_1line,
new String[] {"English", "Hebrew", "Hindi", "Spanish", "German", "Greek" });

mactv.setAdapter(aa2);

mactv.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());