Set Locale programmatically

Question

My app supports 3 (soon 4) languages. Since several locales are quite similar I\'d like to give the user the option to change locale in my application, for instance an Itali

Answer 1

Valid for API16 to API28 Just place this method some where:

Context newContext = context;

Locale locale = new Locale(languageCode);
Locale.setDefault(locale);

Resources resources = context.getResources();
Configuration config = new Configuration(resources.getConfiguration());

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
    config.setLocale(locale);
    newContext = context.createConfigurationContext(config);
} else {
    config.locale = locale;
    resources.updateConfiguration(config, resources.getDisplayMetrics());
}

return newContext;

Insert this code in all your activitys using:

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(localeUpdateResources(base, "<-- language code -->"));
    }

or call localeUpdateResources on fragments, adapters, etc. where you need the new context.

Credits: Yaroslav Berezanskyi