[Android] Save parameter before quit the activity

Save fontsize before finish current activity and call the value when activity is restarted.

public static final String KEY_MY_PREFERENCE = "my_preference";
int fontsize;
public void onCreate(Bundle savedInstanceState) 
{
     SharedPreferences prefs = getSharedPreferences("fontsize", MODE_PRIVATE);
     fontsize = prefs.getInt(KEY_MY_PREFERENCE, fontsize);
}
protected void onStop() {
     super.onStop();
     SharedPreferences prefs = getSharedPreferences("fontsize", MODE_PRIVATE);
     SharedPreferences.Editor editor = prefs.edit();
     editor.putInt(KEY_MY_PREFERENCE, fontsize);
     editor.commit();
}