使用PreferenceActivity的ListActivity选择子类别 [英] Selecting subcategories using ListActivity of PreferenceActivity

问题描述

我使用 PreferenceActivity 来保存一些默认值。

I am using PreferenceActivity to save some default values.

我有一个数组，其中包含区域和每个区域SubArray包含不同区域的列表。我的首选项列表项包含所有区域的列表，但是如何使listPrefernce在点击中显示另一个ListPreference，以便列出其子目录？

I have an array that contains the list of Regions and each region SubArray that contains list of different areas. My Preference List item contains list of all regions but How can I make the listPrefernce show another ListPreference on click so it will list its subAreas?

推荐答案

这听起来像是要使用 http：/ /developer.android.com/guide/topics/ui/settings.html#Subscreens

<PreferenceScreen  xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- opens a subscreen of settings -->
    <PreferenceScreen
        android:key="region1"
        android:title="Region 1"
        android:persistent="false">

        <ListPreference
            android:key="subarray1"
            android:title="SubArray 1" ... />

        <ListPreference
            android:key="subarray2"
            android:title="SubArray 2" ... />
        ....

    </PreferenceScreen>

    <!-- opens another subscreen of settings -->
    <PreferenceScreen
        android:key="region2"
        android:title="Region 2"
        android:persistent="false">

        <ListPreference
            android:key="subarray1"
            android:title="SubArray 1" ... />

        <ListPreference
            android:key="subarray2"
            android:title="SubArray 2" ... />
            ...

    </PreferenceScreen>
    ...
</PreferenceScreen>

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