RTL layout bug in android Oreo

Question

Ever since I upgraded to android oreo on mobile my RTL support for application is not working. it\'s changing the strings to Arabic but not changing layout direction. but if I r

Answer 1

Thanks to @amorenew and tweaked the method in Util class to support for this strange update in oreo below is the working method you just have to call this method onResume whenever user change app language preference

/**
 * this to change app language to the saved language in user preferences
 *
 * @param context
 * @return
 */
public static boolean setDefaultLocale(Context context, boolean isClearData) {
    Resources resources = context.getResources();
    Resources resourcesApp = context.getApplicationContext().getResources();
    String localLanguage = resources.getConfiguration().locale.getLanguage();
    boolean isLanguageChanged = !PreferenceManager.getInstance().getCurrentLanguageCode().equalsIgnoreCase(localLanguage);
    if (isLanguageChanged) {
        Log.d("", PreferenceManager.getInstance().getCurrentLanguageCode());
        Locale locale = new Locale(PreferenceManager.getInstance().getCurrentLanguageCode());
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        resources.updateConfiguration(config, resources.getDisplayMetrics());
        resourcesApp.updateConfiguration(config, resources.getDisplayMetrics());
        //for API 25
        Configuration configuration = resources.getConfiguration();
        configuration.setLocale(locale);
        context.getApplicationContext().createConfigurationContext(configuration);
        context.createConfigurationContext(configuration);

        ((Activity) context).recreate();
        if (isClearData) {
            CurrencyViewModel.getInstance().removeModel();
            CarNationalityViewModel.getInstance().removeModel();
            DialCodeViewModel.getInstance().removeModel();
        }
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            ((Activity)context).getWindow().getDecorView().setLayoutDirection(Locale.getDefault().getLanguage().equalsIgnoreCase("ar")
                    ? View.LAYOUT_DIRECTION_RTL : View.LAYOUT_DIRECTION_LTR);
        }
    }
    return isLanguageChanged;
}

Answer 2

Simple fix in your onCreate function add the following code:

if (Locale.getDefault().getLanguage()=="ar")
     getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
else
     getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_LTR);