CorrectionSettingsFragment.java 文件源码

private void overwriteUserDictionaryPreference(final Preference userDictionaryPreference) {
    final Activity activity = getActivity();
    final TreeSet<String> localeList = UserDictionaryList.getUserDictionaryLocalesSet(activity);
    if (null == localeList) {
        // The locale list is null if and only if the user dictionary service is
        // not present or disabled. In this case we need to remove the preference.
        getPreferenceScreen().removePreference(userDictionaryPreference);
    } else if (localeList.size() <= 1) {
        userDictionaryPreference.setFragment(UserDictionarySettings.class.getName());
        // If the size of localeList is 0, we don't set the locale parameter in the
        // extras. This will be interpreted by the UserDictionarySettings class as
        // meaning "the current locale".
        // Note that with the current code for UserDictionaryList#getUserDictionaryLocalesSet()
        // the locale list always has at least one element, since it always includes the current
        // locale explicitly. @see UserDictionaryList.getUserDictionaryLocalesSet().
        if (localeList.size() == 1) {
            final String locale = (String)localeList.toArray()[0];
            userDictionaryPreference.getExtras().putString("locale", locale);
        }
    } else {
        userDictionaryPreference.setFragment(UserDictionaryList.class.getName());
    }
}