My device system is set to Traditional Chinese.
But I want to my app default language as English.
So I use below code to set default before at first time.  
    Resources res = getResources();
    Configuration config = res.getConfiguration();
    config.locale = Locale.ENGLISH;
    DisplayMetrics dm = res.getDisplayMetrics();
    res.updateConfiguration(config, dm);
But it still show Traditional Chinese but not English.
How can I modify?  
 
     
    