PreferenceFragmentCompat 未显示来自 XML 的所有偏好

如何解决PreferenceFragmentCompat 未显示来自 XML 的所有偏好

我正在我的应用程序上设置 PreferenceScreen，但 PreferenceFragmentCompat 没有在屏幕上显示所有提到的 XML 首选项。

<?xml version="1.0" encoding="utf-8"?>


<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="?android:attr/colorBackground"
    android:clickable="true"
    android:focusable="true">

    <PreferenceCategory
        android:iconSpaceReserved="false"
        android:key="app_setting"
        android:summary="General account setting for app"
        android:title="Account Setting">

        <SwitchPreferenceCompat
            android:checked="true"
            android:defaultValue="true"
            android:icon="@drawable/ic_check"
            android:key="button"
            android:summary="Turn on "
            android:switchTextOff="OFF"
            android:switchTextOn="ON"
            android:title="Updates" />

        <Preference
            android:fragment="com.reacher.Settings_Fragmets.BackUp_Fragment"
            android:icon="@drawable/ic_loop_black_24dp"
            android:summary="Reset your account by deleting all data from server and from app excluding users connections"
            android:title="Reset Account" />


    </PreferenceCategory>
    <PreferenceCategory android:title="Notifications">
        <SwitchPreferenceCompat
            android:defaultValue="true"
            android:icon="@drawable/ic_vibration_black_24dp"
            android:key="Notification_vibrate"
            android:summary="Vibrate when receive new notification"
            android:title="Vibrate" />



    </PreferenceCategory>


    <PreferenceCategory android:title="Privacy &amp; User Setting">
        <Preference
            android:icon="@drawable/ic_backup_black_24dp"
            android:key="bkup"
            android:summary="Backup"
            android:title="Account">

        </Preference>

        <Preference
            android:key="blocked"
            android:summary="People's you block to view your profile and send you message"
            android:title="Blocked List">

        </Preference>

    </PreferenceCategory>
                              


                         <!--NOT SHOWING ANY PREFERENCE FROM HERE -->

    <PreferenceCategory
        android:icon="@drawable/ic_phonelink_lock_black_24dp"
        android:title="Control">

        <ListPreference
            android:defaultValue="1"
            android:dialogTitle="Post"
            android:entries="@array/pref_futurepost_entries"
            android:entryValues="@array/pref_futurepost_values"
            android:key="futurePot"
            android:summary=" next post."
            android:title="Future Post">

        </ListPreference>
      
        
        <ListPreference
            android:defaultValue="1"
            android:dialogTitle="Allow Comments"
            android:entries="@array/pref_futurepost_entries"
            android:entryValues="@array/pref_futurepost_values"
            android:key="Post"
            android:title="Post">

        </ListPreference>
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="dob"
            android:summary="Check"
            android:title="chk parent " />
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="email"
            android:title="Allow 0 " />
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="distance"
            android:title="Allow 1" />
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="status"
            android:title="Allow 2 " />
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="directMessage"
            android:title="Allow 3" />
    </PreferenceCategory>

    <PreferenceCategory android:title="Server tester">
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="Email"
            android:title="test 0" />
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="Ph"
            android:title="test 1" />

        <CheckBoxPreference
            android:defaultValue="true"
            android:key="loc"
            android:title="test 2" />
    </PreferenceCategory>
                     



                            <!--NOT SHOWING ANY PREFERENCE TO HERE -->


    <PreferenceCategory android:title="Developer(BETA)">

        <Preference
            android:summary="Develop your plugins and publish it as add-on"
            android:title="Register" />

    </PreferenceCategory>

</PreferenceScreen>

在 PreferenceFragmentCompat 的 onCreatePreferences 处充气/加载首选项

` @Override
    public void onCreatePreferences(Bundle savedInstanceState,String rootKey) {
        //Load The preferences from xml
        setPreferencesFromresource(R.xml.setting_main,rootKey);
}`

为什么我看不到我的片段上的所有偏好。有什么想法吗？

解决方法

为什么我看不到我的片段上的所有偏好。有什么想法吗？

好吧，看起来不对的一件事是您为根首选项屏幕传递了一些变量 rootKey ...

setPreferencesFromResource(R.xml.setting_main,rootKey);

但是您的布局没有指定键：

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="?android:attr/colorBackground"
    android:clickable="true"
    android:focusable="true">

在 XML 中传递 null 或设置相同的字符串 "key"=YOUR_STRING。