片段必须在主题onCreate中指定preferenceTheme [英] Fragment Must specify preferenceTheme in theme onCreate

问题描述

我试图弄清楚为什么会出现此错误:

I am trying to figure out why I am getting this error:

java.lang.IllegalStateException: Must specify preferenceTheme in theme
at android.support.v7.preference.PreferenceFragmentCompat.onCreate(PreferenceFragmentCompat.java:210)
at android.support.v4.app.Fragment.performCreate(Fragment.java:2177)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager

当尝试运行我的PreferenceFragmentCompat时 这是上面的类代码:

When trying to run my PreferenceFragmentCompat This is the above class code:

public class SettingsFragment extends PreferenceFragmentCompat {

public SettingsFragment() {
    // Required empty public constructor
}

public static SettingsFragment newInstance() {
    SettingsFragment fragment = new SettingsFragment();
    return fragment;
}

@Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
    setPreferencesFromResource(R.xml.settings_preferences, rootKey);
}

}

这是活动的清单声明，其中显示了片段

This is the activity's manifest declaration that shows the fragment

<activity
        android:name=".active_minutes_screen.view.ActiveMinutesActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>

            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
</activity>

显示上述MainActivity中片段的代码

Code that shows the fragment in the above MainActivity

FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_frame, HistoryFragment.newInstance());
ft.commit();

我通过MainActivity申请的主题

Theme that I am applying via the MainActivity

<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
    <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>
</style>

推荐答案

感谢@Panther建议的解决方案.我要做的就是添加这行<item name="preferenceTheme">@style/PreferenceThemeOverlay</item> 我的应用程序主题，而不仅仅是显示我的PreferenceFragment的单个活动的主题:

Thanks to the solution that @Panther suggested. All I had to do is to add this line <item name="preferenceTheme">@style/PreferenceThemeOverlay</item> to my Application Theme and not just the theme of the individual activity that is showing my PreferenceFragment like that:

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>
</style>

或者您可以使用

<item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>

获得现代的材质外观.

这篇关于片段必须在主题onCreate中指定preferenceTheme的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！