Я пытаюсь настроить список частот в моих предпочтениях XML, но я получаю эту ошибку. Я приложил все связанные файлы тоже. Я верю, что правильно установил значения, но могуне могу найти, где моя ошибка в настоящее время. Кроме того, когда я использую SharedPreferences.getString (key, defaultValue), какое значение возвращается? ВХОД или ВХОД?

Моя ошибка:

08-20 00:14:25.195: E/AndroidRuntime(1260): FATAL EXCEPTION: main
08-20 00:14:25.195: E/AndroidRuntime(1260): java.lang.NullPointerException
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.ListPreference.findIndexOfValue(ListPreference.java:215)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.ListPreference.getValueIndex(ListPreference.java:224)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.ListPreference.getEntry(ListPreference.java:202)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.ListPreference.getSummary(ListPreference.java:148)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.Preference.onBindView(Preference.java:515)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.Preference.getView(Preference.java:453)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.preference.PreferenceGroupAdapter.getView(PreferenceGroupAdapter.java:222)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.AbsListView.obtainView(AbsListView.java:2461)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.ListView.makeAndAddView(ListView.java:1775)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.ListView.fillDown(ListView.java:678)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.ListView.fillFromTop(ListView.java:739)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.ListView.layoutChildren(ListView.java:1628)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.AbsListView.onLayout(AbsListView.java:2296)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.View.layout(View.java:14063)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewGroup.layout(ViewGroup.java:4603)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.View.layout(View.java:14063)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewGroup.layout(ViewGroup.java:4603)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.View.layout(View.java:14063)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewGroup.layout(ViewGroup.java:4603)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.View.layout(View.java:14063)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewGroup.layout(ViewGroup.java:4603)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.View.layout(View.java:14063)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewGroup.layout(ViewGroup.java:4603)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1994)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1815)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1112)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4518)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.Choreographer.doCallbacks(Choreographer.java:555)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.Choreographer.doFrame(Choreographer.java:525)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.os.Handler.handleCallback(Handler.java:615)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.os.Looper.loop(Looper.java:137)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at android.app.ActivityThread.main(ActivityThread.java:4898)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at java.lang.reflect.Method.invokeNative(Native Method)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at java.lang.reflect.Method.invoke(Method.java:511)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
08-20 00:14:25.195: E/AndroidRuntime(1260):     at dalvik.system.NativeStart.main(Native Method)

XML-макет:

массив xml:

    8k Hz
    16k Hz
    22.05k Hz
    44.1k Hz
    48k Hz



    8000
    16000
    22050
    44100
    48000

ОБНОВЛЕНИЕ: ЭтоЭто странно, даже когда я выполняю getAll () из общих настроек по умолчанию, это показывает, что "частота_ключ = 8 кГц, Так что'с инициализирован.

Больше кода из моего класса предпочтений:}

public class Settings_ActivityAH extends PreferenceFragment implements OnSharedPreferenceChangeListener{
private SharedPreferences prefs;
private Preference myAccountName;
private Preference myGoogleUsername;
private Preference myGooglePassword;
private static Context context;

public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.preferences);
    context = getActivity();

    if (context == null){
        Log.e("error","context is null");
    }


    prefs = PreferenceManager.getDefaultSharedPreferences(context);

    myAccountName = (Preference) findPreference("account_name_title_key");
    myGoogleUsername = (Preference) findPreference("googleusername_key");
    myGooglePassword = (Preference) findPreference("googlepassword_key");
    myAccountName.setSummary(prefs.getString("account_name_title_key", "none"));
    myGoogleUsername.setTitle("username: "+prefs.getString("googleusername_key", "none"));
    myGooglePassword.setTitle("password: "+prefs.getString("googlepassword_key", "none"));
    Log.e("Check prefs",prefs.getAll().toString());
    prefs.registerOnSharedPreferenceChangeListener(this);

}

@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
        String key) {
    Log.e("in onSharedPref","yea");
    Preference preference = findPreference(key);

    if (preference.getClass() == EditTextPreference.class){
        Log.e("in editText Pref", "yeah");

        if( key.equals("account_name_title_key")){
            myAccountName.setSummary(sharedPreferences.getString("account_name_key","none"));
            Log.e("accountname prefs",sharedPreferences.getString("account_name_key","none"));
    }
        if( key.equals("account_name_key")){
            myAccountName.setSummary(sharedPreferences.getString("account_name_key","none"));
            Log.e("accountname prefs",sharedPreferences.getString("account_name_key","none"));
    }

    else if (preference.getClass() == PreferenceCategory.class){
        Log.e("in category Pref", "yeah");

        if (key.equals("googleusername_key")){
            myGoogleUsername.setTitle("Username: "+sharedPreferences.getString(key, "none"));
            Log.e("googleusername prefs",sharedPreferences.getString(key, "none"));

        }
        else if( key.equals("googlepassword_key")){
            myGooglePassword.setTitle("Password: "+sharedPreferences.getString(key, "none"));
            Log.e("googlepassword prefs",sharedPreferences.getString(key, "none"));

        }
    }

}
else{
    Log.e("insufficient key called","onSharedPreferenceChanged AH");
}

}