preferenceScreens之间切换的Andr​​oid [英] Android switching between PreferenceScreens

问题描述

我有一个preferencesScreen，也有一些preferences和子画面。它看起来是这样的：

I have a PreferencesScreen, that has some Preferences and a sub-screen. It looks like this:

<PreferenceScreen android:key="root">

    <Preference android:key="first" />

    <PreferenceScreen android:key="subScreen" />
        <Preference android:key="second" />
        <Preference android:key="third" />
    </PreferenceScreen>

</PreferenceScreen>

当用户点击子屏幕，他被转移到子屏幕视图。现在我想将用户重定向到根preference屏幕，当他点击第二或第三。我似乎还没有找到合适的API要么接近的子屏幕，或专注于previous之一。想法？

When user clicks the subscreen, he is moved to the subscreen view. Now I want to redirect the user to "root" preference screen when he clicks on "second" or "third". I don't seem to find the right API to either close the subscreen, or focus the previous one. Ideas?

推荐答案

preference子屏幕显示为一个对话框，在你的情况下，将足以关闭该对话框重新presenting相应的 preferenceScreen 。将在的preferenceClick（）方法，下面的代码片断到在preferenceClickListener 你可能设置为第二和第三preferences关闭对话框：

Preference subscreen is displayed as a dialog, in your case it would be enough to dismiss the dialog representing appropriate PreferenceScreen. Insert the following snippet into onPreferenceClick() method of OnPreferenceClickListener you probably set for "second" and "third" preferences to close the dialog:

PreferenceScreen ps = (PreferenceScreen)PrefsActivity.this.getPreferenceScreen()
    .findPreference("subScreen");
ps.getDialog().dismiss();

其中， prefsActivity 是 preferenceActivity 的封闭实例是应用程序中使用。

where PrefsActivity is the enclosing instance of PreferenceActivity that is used in your application.

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