How to change the value of a string in XML?

Question

There is a way to change a string value in XML.

I know how to get the value through getResource().getString(R.string.value); but I don’t know how to change the value directly in XML. Is this allowed? Or the values created in XML are constant (immutable)?

Answer 1

According to that answer in the SOEN, what you want is not possible - the string.xml in fact it is read-only. The recommended alternative is to use SharedPreferences: a way to create and persist user preferences data.

At this link has an example of how to use them (if this alternative really suits you, of course):

public class Calc extends Activity {
    public static final String PREFS_NAME = "MyPrefsFile";

    @Override
    protected void onCreate(Bundle state){
       super.onCreate(state);
       . . .

       // Recupera as preferências salvas
       SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
       boolean silent = settings.getBoolean("silentMode", false);
       setSilent(silent);
    }

    @Override
    protected void onStop(){
       super.onStop();

      // Atribui uma nova preferência; isso é feito através de um Editor
      // Todos os objetos são de android.context.Context
      SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
      SharedPreferences.Editor editor = settings.edit();
      editor.putBoolean("silentMode", mSilentMode);

      // Confirma as edições
      editor.commit();
    }
}