How to change Android O / Oreo / api 26 app language

Question

I want to change the language of the app and this works fine until API 26.

For api > 25 I put Locale.setDefault(Locale.Category.DISPLAY, mynewlanglocale);

Answer 1

updateConfiguration is deprecated and you should use createConfigurationContext. I solved it this way:

    @Override
    protected void attachBaseContext(Context newBase) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            Configuration config = newBase.getResources().getConfiguration();
            //Update your config with the Locale i. e. saved in SharedPreferences
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(newBase);
            String language = prefs.getString(SP_KEY_LANGUAGE, "en_US");
            Locale.setDefault(locale);
            config.setLocale(new Locale(language));
            newBase = newBase.createConfigurationContext(config);
        }
        super.attachBaseContext(newBase);
    }