用复选框以编程方式填充首选项

PreferenceActivity

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(this);

    PreferenceCategory category = new PreferenceCategory(this);
    category.setTitle(\"category name\");

    screen.addPreference(category);

    CheckBoxPreference checkBoxPref = new CheckBoxPreference(this);
    checkBoxPref.setTitle(\"title\");
    checkBoxPref.setSummary(\"summary\");
    checkBoxPref.setChecked(true);

    category.addPreference(checkBoxPref);
    setPreferenceScreen(screen);
}

setContentView(R.layout.preferences);
addPreferencesFromResource(R.xml.preferences);

PreferenceScreen pScreen = getPreferenceManager().createPreferenceScreen(this);     
CheckBoxPreference cb = new CheckBoxPreference(this);
cb.setKey(\"cb\");
cb.setTitle(\"BLAH\");
cb.setOrder(99);        //not working...
pScreen.addPreference(cb);

setPreferenceScreen(pScreen);
addPreferencesFromResource(R.xml.preferences);