SetLocale

private void setLocale(String localeName) {
        try {
            Locale locale = new Locale(localeName);
            Class amnClass = amnClass = Class.forName("android.app.ActivityManagerNative");
            Object amn = null;
            Configuration config = null;
            // amn = ActivityManagerNative.getDefault();
            Method methodGetDefault = amnClass.getMethod("getDefault");
            methodGetDefault.setAccessible(true);
            amn = methodGetDefault.invoke(amnClass);
            // config = amn.getConfiguration();
            Method methodGetConfiguration = amnClass.getMethod("getConfiguration");
            methodGetConfiguration.setAccessible(true);
            config = (Configuration) methodGetConfiguration.invoke(amn);
            // config.userSetLocale = true;
            Class configClass = config.getClass();
            Field f = configClass.getField("userSetLocale");
            f.setBoolean(config, true);
            // set the locale to the new value
            config.locale = locale;
            // amn.updateConfiguration(config);
            Method methodUpdateConfiguration = amnClass.getMethod("updateConfiguration", Configuration.class);
            methodUpdateConfiguration.setAccessible(true);
            methodUpdateConfiguration.invoke(amn, config);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }
    }