SettingsFragment.java 文件源码

public void setSummary(String key, String summaryOn, String summaryOff) {
    Preference connectionPref = findPreference(key);
    if (connectionPref instanceof TwoStatePreference) {
        ((TwoStatePreference) connectionPref).setSummaryOn(summaryOn);
        ((TwoStatePreference) connectionPref).setSummaryOff(summaryOff);
    }
}