java - Android app language changes everywhere but not in menu and tab layout title

Question

I have encountered a very peculiar problem. I want to change my app's language and to do so I used the code I found here, on stackoverflow:

private void restartActivityInLanguage(String language) {
    Locale locale = new Locale(language);
    Configuration config = new Configuration();
    config.locale = locale;
    Resources resources = getResources();
    resources.updateConfiguration(config, resources.getDisplayMetrics());
    getActivity().recreate();
}

    polishLanguage = view.findViewById(R.id.polish_language);
    englishLanguage = view.findViewById(R.id.english_language);

    polishLanguage.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v) {
            restartActivityInLanguage("pl");

        }
    });

    englishLanguage.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v) {
            restartActivityInLanguage("en");
        }
    });

This code works perfectly with the main part of my app but there're places where the text doesn't change and stays in the same language version as my whole phone, the places are:

• popup menus

    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Context wrapper = new ContextThemeWrapper(context, R.style.PopupMenu);
            PopupMenu popup = new PopupMenu(wrapper, v);
            popup.inflate(R.menu.browse_location_menu);
  
  
            popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                @Override
                public boolean onMenuItemClick(MenuItem item) {
                    switch (item.getItemId()) {
                        case R.id.browse_location_edit:
                            onProductClick.onClick(locationModel);
                            break;
                        case R.id.browse_location_delete:
                            onProductClick.onDelete(locationModel);
                            break;
                        default:
                            break;
                    }
                    return true;
                }
            });
            popup.show();
        }
    });
  

<item
    android:id="@+id/browse_location_edit"
    android:title="@string/browse_location_edit" />

<item
    android:id="@+id/browse_location_delete"
    android:title="@string/browse_location_delete"/>

-tablayout titles

TabLayout tabLayout = findViewById(R.id.tab_layout);
    new TabLayoutMediator(tabLayout, viewPager,
            (tab, position) ->
            {
                switch (position) {
                    case 0:
                        tab.setText(getString(R.string.add_product));
                        break;
                    case 1:
                        tab.setText(getString(R.string.add_location));
                        break;
                }
            }
    ).attach();

<com.google.android.material.tabs.TabLayout
    android:id="@+id/tab_layout"
    android:layout_width="match_parent"
    android:layout_height="@dimen/TabLayoutHeight"
    android:background="@color/IvoryBackground"
    app:layout_constraintTop_toBottomOf="@+id/toolbar" />

I am using text from string.xml file that contains strings in two language versions.

I have run out of ideas as to what may cause this problem. There's no error in logcat, the text just doesn't change. Any help and suggestions will be appreciated :)

Answer 1

You can try to play around with a couple of things:

First: The context you use:

getString(R.string.my_string);
getApplication().getString(R.string.my_string);
getApplicationContext().getString(R.string.my_string);
getBaseContext().getString(R.string.my_string);

Second: The method of getting the String:

Resources.getSystem().getString(R.string.my_string);
getResources().getString(R.string.my_string);
getString(R.string.my_string);

I faced this some time ago, and the first method worked for me.