android中的操作栏中的语言没有改变

Question

我想将语言从英语更改为阿拉伯语。如果我选​​择阿拉伯语意味着所有文本都应该更改。但是操作栏和导航抽屉中的文本没有改变。如何更改操作栏和导航中的语言抽屉。我试过这样的事情。

    button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Configuration config = new Configuration();
                switch (spinner.getSelectedItemPosition()) {

                    case 0:
                        changeLocale(Emp_LocalizationActivity.this,"en");

                        break;
                    case 1:

                        changeLocale(Emp_LocalizationActivity.this,"ar");

                        break;

                    default:
                        config.locale = Locale.ENGLISH;
                        break;


                }
                Intent i= new Intent(Emp_LocalizationActivity.this,Emp_Home.class);
                startActivity(i);
            }
        });

   public static void changeLocale(Activity activity, String language)
    {
        final Resources res = activity.getResources();
        final Configuration conf = res.getConfiguration();
        if (language == null || language.length() == 0)
        {
            conf.locale = Locale.getDefault();
        }
        else
        {
            final int idx = language.indexOf('-');
            if (idx != -1)
            {
                final String[] split = language.split("-");
                conf.locale = new Locale(split[0], split[1].substring(1));
            }
            else
            {
                conf.locale = new Locale(language);
            }
        }

        res.updateConfiguration(conf, null);
    }

`