Is there are way to switch between different languages within an app using androids multilanguage support (values-de
folder for german and value-en
folder for english)?
This is not really supported but possible by changing the Configuration object's "locale" field [Google Groups Post]
Configuration c = new Configuration(getResources().getConfiguration());
c.locale = Locale.GERMAN;
getResources().updateConfiguration(c, getResources().getDisplayMetrics());
Note that this alone will only effect future strings, not ones already displayed on the screen. You'd want to do this from a different activity than your main one, then finish your main one and restart it. This is hacky. See Post from Hackborn