Formatação para celular

edtPhone.addTextChangedListener(new TextWatcher() {
  @Override
  public void afterTextChanged(Editable s) {
    String phone = s.toString();
    if (phone.length() == 12) {
      String formattedPhone = String.format("(%s) %s-%s",
      phone.substring(0, 2),
      phone.substring(2, 6),
      phone.substring(6, 10));
      edtPhone.setText(formattedPhone);
    }
  }
  @Override
  public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
  @Override
  public void onTextChanged(CharSequence s, int start, int before, int count) {}
});