android - 首选项支持库 - SwitchPreference 不起作用

Question

几天前，Google 推出了 Preference Support Library (Link)。我刚刚尝试在我的应用程序中实现它，但它似乎不适用于 SwitchPreferences 这很奇怪，因为 Google 声明我们可以使用与以前相同的 XML 文件，并且明确表示 SwitchPreferences 是现在可用于所有 API 7+ 设备。

报价 (Source)

[...] and add preferences using the same preference XML files (http://goo.gl/wOcIxI), while adding support for elements such as SwitchPreference (previously only available on API 14+ devices) to all API 7+ devices. [...]

错误信息

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.my.package/com.my.package.Main}: android.view.InflateException: Binary XML file line #4: Error inflating class (not found)SwitchPreference
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

相关部分显然是Binary XML file line #4: Error inflating class (not found)SwitchPreference。

Java 代码

public class FragmentSettings extends PreferenceFragmentCompat {

    @Override
    public void onCreatePreferences(Bundle bundle, String s) {
        addPreferencesFromResource(R.xml.preferences);
    }
}

preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

    <SwitchPreference
        android:key="pref_something"
        android:summary="Lorem ipsum dolor sit amet"
        android:title="Lorem ipsum" />

</PreferenceScreen>

所以基本上问题是:我做错了什么还是这确实是首选项支持库的错误？

Answer 1

SwitchPreference 在 API 级别 14 中添加。如果您使用的是 Preferences Support Library v7，则必须改用 SwitchPreferenceCompat。

<SwitchPreferenceCompat
    android:key="pref_something"
    android:summary="Lorem ipsum dolor sit amet"
    android:title="Lorem ipsum" />