//Enregistrement
SharedPreferences prefs = this.getSharedPreferences(TonActivity.class.getSimpleName(),Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("une_clef", une_valeur); //On entre un String
editor.putInt("un_autre_clef", une_autre_valeur); //On entre un int
editor.commit();

//Lecture
SharedPreferences prefs = getSharedPreferences(TonActivity.class.getSimpleName(), Context.MODE_PRIVATE);
String registrationId = prefs.getString(la_clef, "");
int registeredVersion = prefs.getInt(la_clef, Integer.MIN_VALUE);