Libgdx: how to save Preferences?

Question

Am I doing this wrong? The preferences file is empty

Preferences prefs = Gdx.app.getPreferences("My Preferences");
    prefs.putBoolean("debug",true);
    prefs.flush();

Answer 1

To work properly the filename of the preferences should not contain whitespaces. So the fix in your case is:

Preferences prefs = Gdx.app.getPreferences("MyPreferences");
    prefs.putBoolean("debug",true);
    prefs.flush();