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POSharedPreferences ListPreference NullPointerException
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copied!<p>I'm trying to set up a list of frequencies in my preferences xml but I keep getting this error. I have attached all the related files too. I believe that I set up the values correctly but I can't find where my error currently is. Also, when I use the SharedPreferences.getString(key, defaultValue) what value is returned? The ENTRY or the ENTRYVALUE?</p> <p>My Error:</p> <pre><code>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) </code></pre> <p>xml layout:</p> <pre><code><ListPreference android:key="frequency_key" android:title="Sample Rate" android:defaultValue="8000" android:entries="@array/freq_titles" android:entryValues="@array/freq_values" /> </code></pre> <p>xml array:</p> <pre><code><?xml version="1.0" encoding="utf-8"?> <resources> <string-array name="freq_titles"> <item name="8000">8k Hz</item> <item name="16000">16k Hz</item> <item name="22050">22.05k Hz</item> <item name="44100">44.1k Hz</item> <item name="48000">48k Hz</item> </string-array> <array name="freq_values"> <item name="8000">8000</item> <item name="16000">16000</item> <item name="22050">22050</item> <item name="44100">44100</item> <item name="48000">48000</item> </array> </resources> </code></pre> <p>UPDATE: It's weird even when I do a getAll() from the default shared preferences it shows me that "frequency_key=8k Hz". So it's initialized.</p> <p>More code from my preference class:</p> <pre><code>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"); } } </code></pre> <p>}</p>

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