factor out Tileset stuff. no, this isn't what correct OOA/OOD should look like, but...

[FreeShisen] / res / xml / preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
    <ListPreference
        android:defaultValue="@string/size_default"
        android:dialogTitle="@string/size"
        android:entries="@array/sizes"
        android:entryValues="@array/size_values"
        android:key="pref_size"
        android:title="@string/size" />
    <ListPreference
        android:defaultValue="@string/difficulty_default"
        android:dialogTitle="@string/difficulty"
        android:entries="@array/difficulties"
        android:entryValues="@array/difficulty_values"
        android:key="pref_diff"
        android:title="@string/difficulty" />
    <CheckBoxPreference
        android:defaultValue="false"
        android:key="pref_grav"
        android:summaryOff="@string/gravity_pref_off"
        android:summaryOn="@string/gravity_pref_on"
        android:title="@string/gravity" />
    <CheckBoxPreference
        android:defaultValue="true"
        android:key="pref_time"
        android:summaryOff="@string/time_pref_off"
        android:summaryOn="@string/time_pref_on"
        android:title="@string/time_counter" />
    <ListPreference
        android:defaultValue="@string/tileset_default"
        android:dialogTitle="@string/tileset"
        android:entries="@array/tilesets"
        android:entryValues="@array/tilesets"
        android:key="pref_tile"
        android:title="@string/tileset" />
</PreferenceScreen>