java.lang.IllegalStateException:必须在主题中指定preferenceTheme [英] java.lang.IllegalStateException: Must specify preferenceTheme in theme

问题描述

我试图在运行于API 16的应用程序中加载PreferenceFragment(PreferenceFragmentCompat)，但是每次尝试加载该片段时，都会出现以下错误:

I am trying to load a PreferenceFragment (PreferenceFragmentCompat) in an application running on API 16, but every time I attempt to load the fragment I get the following error:

E/AndroidRuntime:致命例外:main java.lang.IllegalStateException:必须在主题中指定preferenceTheme

E/AndroidRuntime: FATAL EXCEPTION: main java.lang.IllegalStateException: Must specify preferenceTheme in theme

该片段在API级别21及更高版本中加载得很好.我尝试使用此库 https://github.com/Gericop/Android-Support-Preference-V7-Fix ，但仍无法正常工作.

The fragment loads just fine in API levels 21 and up. I've tried using this library https://github.com/Gericop/Android-Support-Preference-V7-Fix, but it's still not working.

推荐答案

我设法修复了它.问题是我的活动正在加载片段，但没有设置主题.

I managed to fix it. The problem was my activity that was loading the fragment didn't have the theme set.

< activity android:name =.controllers.MainActivity"android:theme ="@ style/AppTheme.Base"/>

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