PreferenceScreen class not found

Question

I have a simple preferences.xml:

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
        <PreferenceCategory
                android:title="First Category">
                <CheckBoxPreference
....

My android version is 2.1 (API7) java is 1.6, use eclipse indigo. In the package explorer there is android.jar and after I opened it there is android.preference package.

Even so I get the following error:

com.android.layoutlib.bridge.MockView cannot be cast to android.view.ViewGroup
Exception details are logged in Window > Show View > Error Log
The following classes could not be found:
- PreferenceCategory (Fix Build Path, Edit XML)
- PreferenceScreen (Fix Build Path, Edit XML)

What should I do? Thanx in advance

which folder inside **res** have you placed your *preferences.xml* file? — waqaslam, Jul 18 '12 at 11:07
Possible duplicate of [PreferenceScreen class not found](http://stackoverflow.com/questions/6025349/preferencescreen-class-not-found) — Md Imran Choudhury, May 27 '16 at 12:12

score 20 · Accepted Answer · answered Jul 18 '12 at 11:09

20

If preferences.xml is not in res/xml you should move it there. I am guessing that it could be the source of your problem.

answered Jul 18 '12 at 11:09

wojciii

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It was the problem. So I can't view/manage the preferences screen in the graphical editor? – Franziee Jul 18 '12 at 12:17
I don't think so. The tutorials that I have used for my own stuff all assume that you create an activity and load the preferences from a xml file. – wojciii Jul 18 '12 at 12:30

PreferenceScreen class not found

1 Answers1