res/xml/clock_preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >

    <com.google.android.apps.adk2.widget.TimeDialogPreference
        android:dialogLayout="@layout/time_dialog"
        android:key="time"
        android:negativeButtonText="@string/cancel"
        android:positiveButtonText="@string/set"
        android:title="@string/pref_clock_set_time_title" />

</PreferenceScreen>