Android: ListPreference cannot support int values

Question

In my application, I have the values:

<ListPreference
    android:key="font_setting"
    android:title="@string/font"
    android:summary="%s"
    android:entries="@array/font_list"
    android:entryValues="@array/font_list_values"
    android:dialogTitle="@string/choose_font" />

and data:

<string-array name="font_list">
    <item>"Small"</item>
    <item>"Medium"</item>
    <item>"Big"</item>
</string-array>
<integer-array name="font_list_values">
    <item>1</item>
    <item>2</item>
    <item>3</item>
</integer-array>

but when I select one value, the application crashes, an error appears:

java.lang.NullPointerException
at android.preference.ListPreference.onDialogClosed(ListPreference.java:264)

I found that this is actually a very old problem raised here . And surprisingly, Google simply said that this is not a mistake, and there are no problems? Anyone have any suggestions?
This is tested in Android version 4.0.

Answer 1

Why not use a string array and convert to integers later ( Integer.valueOf()), in code:

<string-array name="font_list_values">
    <item>1</item>
    <item>2</item>
    <item>3</item>
</string-array>

Answer 2

, - . . Integer.valueOf().