Formatação CPF

final EditText cpfEditText = (EditText) findViewById(R.id.cpf_edit_text);
cpfEditText.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }
    @Override
    public void afterTextChanged(Editable s) {
        final String cpf = s.toString();
        if (cpf.length() == 11) {
            String cpfFormatado = cpf.substring(0, 3) + "." + cpf.substring(3, 6) + "." + cpf.substring(6, 9) + "-" + cpf.substring(9, 11);
            cpfEditText.setText(cpfFormatado);
            cpfEditText.setSelection(cpfFormatado.length());
        }
    }
});