android – 如何导航到嵌套的PreferencesScreen

<PreferencesScreen>
    <PreferencesScreen android:key="application">

    </PreferencesScreen>
</PreferencesScreen>

在我的应用程序中,我有类似的任务以编程方式显示第二级PreferencesScreen.我做了什么：

>在preferences.xml中,我为要显示的PreferencesScreen分配了一个键(如问题所示).
>要显示我写的PreferencesScreen：

final Intent preferencesActivity = new Intent(getBaseContext(),MyPreferencesActivity.class);
preferencesActivity.putExtra("PREFERENCE_SCREEN_KEY","key_of_preference_screen_to_show");
startActivity(preferencesActivity);

>然后在方法onCreate的PreferenceActivity类中添加以下代码：

final Intent intent = geTintent();
final String startScreen = intent.getStringExtra("PREFERENCE_SCREEN_KEY");
if (startScreen != null) {
    geTintent().removeExtra("PREFERENCE_SCREEN_KEY");
    final Preference preference = findPreference(startScreen);
    final PreferenceScreen preferenceScreen = getPreferenceScreen();
    final listadapter listadapter = preferenceScreen.getRootAdapter();
    final int itemsCount = listadapter.getCount();
    int itemnumber;
    for (itemnumber = 0; itemnumber < itemsCount; ++itemnumber) {
        if (listadapter.getItem(itemnumber).equals(preferencE)) {
            preferenceScreen.onItemClick(null,null,itemnumber,0);
            break;
        }
    }
}

一句话……不仅是第二级的PreferencesScreen,而且这里加载了整个首选项层次结构.因此,如果按“返回”按钮,将显示第一个(父)PreferencesScreen.就我而言,这正是我所需要的.不确定你的.