TS_Settings.java 文件源码

@Override
public boolean onPreferenceChange(Preference preference, Object value) {
    String stringValue = value.toString();
    if (preference instanceof ListPreference) {
        ListPreference listPreference = (ListPreference) preference;
        int index = listPreference.findIndexOfValue(stringValue);
        preference  .setSummary(index >= 0 ? listPreference.getEntries()[index]: null);

    } else if (preference instanceof RingtonePreference) {
        if (TextUtils.isEmpty(stringValue)) {
            preference.setSummary(R.string.pref_ringtone_silent);
        } else {
            Ringtone ringtone = RingtoneManager.getRingtone(preference.getContext(), Uri.parse(stringValue));
            if (ringtone == null) {
                preference.setSummary(null);
            } else {
                String name = ringtone
                        .getTitle(preference.getContext());
                preference.setSummary(name);
            }
        }
    } else {
        preference.setSummary(stringValue);
    }
    return true;
}