Java.lang.Integer нельзя привести к java.lang.String в addPreferencesFromResource ⇐ Android

[Anonymous]

У меня есть пример настроек:
public class UserPreferences extends PreferenceActivity {
@Override
public void onCreate(Bundle saveInstanceState){
super.onCreate(saveInstanceState);
getFragmentManager().beginTransaction().replace(android.R.id.content, new MynewFracment()).commit();
}
public static class MynewFracment extends PreferenceFragment{
@Override
public void onCreate(Bundle saveInstanceState){
super.onCreate(saveInstanceStates);
addPreferencesFromResource(R.xml.userpreference);
}
}
}

Но возвращаемый результат: java.lang.Integer нельзя привести к java.lang.String в строке addPreferencesFromResource(R.xml.userpreferences); . Я действительно не знаю, что я здесь сделал не так?

Обновление 1







Обновление 2
Мои значения R.



Every Minutes
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И моя трассировка стека
E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.begood.earthquake/com.begood.earthquake.UserPreferences}: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at android.app.SharedPreferencesImpl.getString(SharedPreferencesImpl.java:205)
at android.preference.Preference.getPersistedString(Preference.java:1399)
at android.preference.ListPreference.onSetInitialValue(ListPreference.java:278)
at android.preference.Preference.dispatchSetInitialValue(Preference.java:1315)
at android.preference.Preference.onAttachedToHierarchy(Preference.java:1127)
at android.preference.PreferenceGroup.addPreference(PreferenceGroup.java:156)
at android.preference.PreferenceGroup.addItemFromInflater(PreferenceGroup.java:97)
at android.preference.PreferenceGroup.addItemFromInflater(PreferenceGroup.java:38)
at android.preference.GenericInflater.rInflate(GenericInflater.java:488)
at android.preference.GenericInflater.inflate(GenericInflater.java:326)
at android.preference.GenericInflater.inflate(GenericInflater.java:263)
at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:269)
at android.preference.PreferenceFragment.addPreferencesFromResource(PreferenceFragment.java:278)
at com.begood.earthquake.UserPreferences$MynewFracment.onCreate(UserPreferences.java:20)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:796)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
at android.app.BackStackRecord.run(BackStackRecord.java:635)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1397)
at android.app.Activity.performStart(Activity.java:5017)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
at android.app.ActivityThread.access$600(ActivityThread.java:130) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:4745) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
at dalvik.system.NativeStart.main(Native Method) 


Подробнее здесь: https://stackoverflow.com/questions/358 ... fromresour