PrefFragment.java 文件源码

public boolean onPreferenceChange(Preference preference, Object newValue) {
switch (preference.getKey()){
    case "pref_user_name":
        userInFo.setTitle("尊敬的"+"“"+nickname+"”");
        userInFo.setSummary("欢迎使用本应用");
        break;

    case"pref_theme_dark":
        if((boolean)newValue) {
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
        } else  {
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
        }
        ActivityCollector.activities.get(0).recreate();//返回栈的首节点应该是主活动，让它重启
        getActivity().recreate();

        //Toast.makeText(getActivity(), "都说了功能还在开发中"+newValue, Toast.LENGTH_SHORT).show();
        break;
}

    return true;
}