bakutoolkit/src/main/res/xml/pref_logging.xml

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

   <EditTextPreference
        android:id="@+id/pref_vlevel"
        android:key="io.v.v23.LOG_VLEVEL"
        android:title="@string/vlevel"
        android:selectAllOnFocus="true"
        android:inputType="number"
        android:singleLine="true"
        android:maxLines="1" />

    <EditTextPreference
        android:id="@+id/pref_vmodule"
        android:key="io.v.v23.LOG_VMODULE"
        android:title="@string/vmodule"
        android:selectAllOnFocus="false"
        android:singleLine="true"
        android:maxLines="1" />

</PreferenceScreen>