samples/ApiDemos/res/xml/advanced_preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2008 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<!-- This is an advanced example showing the custom preference types and manually handling
     preference clicks. -->
<PreferenceScreen
        xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- My custom preference type.  This just replaces the actual widget
         portion of the preference, if the whole preference wanted to be
         replaced we would use the layout attribute instead of the widgetLayout
         attribute. -->
    <com.example.android.apis.preference.MyPreference
            android:key="my_preference"
            android:title="@string/title_my_preference"
            android:summary="@string/summary_my_preference"
            android:defaultValue="100" />

    <CheckBoxPreference
            android:key="advanced_checkbox_preference"
            android:title="@string/title_advanced_toggle_preference"
            android:summaryOn="@string/summary_on_advanced_toggle_preference" 
            android:summaryOff="@string/summary_off_advanced_toggle_preference" />

</PreferenceScreen>