SettingsFragment.java 文件源码

/**
 * Sets the summary of the Ringtone Preference to the human readable name of the selected
 * ringtone
 *
 * @param ringtonePreference The preference to update
 * @param selectedRingtoneUriString The String version of the selected ringtone Uri
 */
private void updateRingtonePreferenceSummary(final RingtonePreference ringtonePreference, final String selectedRingtoneUriString) {

    if (!TextUtils.isEmpty(selectedRingtoneUriString)) {
        final Ringtone selectedRingtone = RingtoneManager
                .getRingtone(getActivity(), Uri.parse(selectedRingtoneUriString));

        if (selectedRingtone == null) {
            ringtonePreference.setSummary(null);
        } else {
            ringtonePreference.setSummary(selectedRingtone.getTitle(getActivity()));
        }
    } else {
        ringtonePreference.setSummary(null);
    }

}