Formatação celular

EditText cpfeditText = (EditText) findViewById(R.id.cpf_edit_text);
InputFilter[] cpfFilters = {new InputFilter() {
    @Override
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        if (dest.length() == 14) {
            Toast.makeText(HomeActivity.this, "Limite de caracteres atingido DO CPF ", Toast.LENGTH_SHORT).show();
            return "";
        }
        return null;
    }
}};
cpfeditText.setFilters(cpfFilters);