FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();

CountryPicker picker = new CountryPicker();

transaction.replace(R.id.home, picker);
transaction.commit();

 CountryPicker picker = CountryPicker.newInstance("SelectCountry");
 picker.show(getSupportFragmentManager(), "COUNTRY_CODE_PICKER");

picker.setListener(new CountryPickerListener() {
    @Override
    public void onSelectCountry(String name, String code, String dialCode) {
    }
});