how to remove this warning - "Element SwitchPreferenceCompat is not allowed here"?

user_7085818 0
Viewed 5296

In an Android project inside res/xml/ file name pref_visualizer.xml

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

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

    <SwitchPreferenceCompat
        android:defaultValue="@bool/pref_show_bass_default"
        android:key="@string/pref_show_bass_key"
        android:summaryOff="@string/pref_show_false"
        android:summaryOn="@string/pref_show_true"
        android:title="@string/pref_show_bass_label" />
    <SwitchPreferenceCompat
        android:key="@string/pref_show_mid_key"
        android:title="@string/pref_show_mid_label"
        android:summaryOff="@string/pref_show_false"
        android:summaryOn="@string/pref_show_true"
        android:defaultValue="@bool/pref_show_bass_default" />
    <SwitchPreferenceCompat
        android:key="@string/pref_show_treble_key"
        android:title="@string/pref_show_treble_label"
        android:summaryOff="@string/pref_show_false"
        android:summaryOn="@string/pref_show_true"
        android:defaultValue="@bool/pref_show_bass_default" />

</PreferenceScreen>

The SwitchPreferenceCompat text is highlighted and says it cant be allowed here.How to fix this warning. The app runs without any problem. But still I would like to know How to fix this issue.

android xml
6 Answers

Try to replace PreferenceScreen with android.support.v7.preference.PreferenceScreen in the root tag of your preference XML file (the pref_visualizer.xml in this case).

user_50736500

The "SwitchPreferenceCompat" tag belongs to the com.android.support:preference-v7:28.0.0 library. so you need to match the libraries of the parent "PreferenceScreen" tag and the "SwitchPreference" tag (@f0rrest suggested to update the parent tag to v7). however the instructions and recommendation in the android developer site (developer.android.com/guide/topics/ui/settings) is to use the AndroidX Preference Library. therefore i suggest to migrate the project to AndroidX and use "androidx.preference.PreferenceScreen" for the parent tag.

user_112631880

Your PreferenceScreen's layout cannot be in res/layout/ they have to be in res/xml/

user_25857280

As a supplement to f0rrest's answer for the newer versions, you could also replace PreferenceScreen with androidx.preference.PreferenceScreen which will also work.

user_123275030

Use the full path to the class in the xml to avoid the issue:

<com.example.CustomSwitchPreference..
user_32509690
Related