Error inflating layout with java.lang.ClassNotFoundException

OK now I know that this question has been asked before several times on SO but none of the answers have worked for me. I am attempting to create a custom preference for my project. More specifically it is a preference with a `HorizontalListView` attached directly underneath it. I basically created it by modifying this code for a `SeekBarPreference` (which I am also using and is working fine). My `ListViewPreference` is located in exactly the same folder as the `SeelkBarPreference` (which, as I said is having no problem) but I am constantly getting a `ClassNotFoundException` (see logcat below). Here is my `ListViewPreference` class: ``` package com.example.ebookreader; import android.content.Context; import android.content.res.TypedArray; import android.preference.Preference; import android.util.AttributeSet; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.view.ViewParent; import android.widget.RelativeLayout; import android.widget.TextView; public class ListViewPreference extends Preference { private final String TAG = getClass().getName(); private static final String ROBOBUNNYNS = "http://robobunny.com"; private static final int DEFAULT_VALUE = 50; private int mCurrentValue; private String mUnitsLeft = ""; private String mUnitsRight = ""; private HorizontalListView mListView; private TextView mStatusText; public ListViewPreference(Context context, AttributeSet attrs) { super(context, attrs); initPreference(context, attrs); } public ListViewPreference(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initPreference(context, attrs); } private void initPreference(Context context, AttributeSet attrs) { setValuesFromXml(attrs); mListView = new HorizontalListView(context, attrs); LayoutParams params = mListView.getLayoutParams(); params.width = LayoutParams.MATCH_PARENT; params.height = LayoutParams.WRAP_CONTENT; mListView.setLayoutParams(params); } private void setValuesFromXml(AttributeSet attrs) { mUnitsLeft = getAttributeStringValue(attrs, ROBOBUNNYNS, "unitsLeft", ""); String units = getAttributeStringValue(attrs, ROBOBUNNYNS, "units", ""); mUnitsRight = getAttributeStringValue(attrs, ROBOBUNNYNS, "unitsRight", units); } private String getAttributeStringValue(AttributeSet attrs, String namespace, String name, String defaultValue) { String value = attrs.getAttributeValue(namespace, name); if (value == null) value = defaultValue; return value; } @Override protected View onCreateView(ViewGroup parent) { RelativeLayout layout = null; try { LayoutInflater mInflater = (LayoutInflater) getContext() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); layout = (RelativeLayout) mInflater.inflate( R.layout.horizontal_list_view_preference, parent, false); } catch (Exception e) { Log.e(TAG, "Error creating seek bar preference", e); } return layout; } @Override public void onBindView(View view) { super.onBindView(view); try { // move our seekbar to the new view we've been given ViewParent oldContainer = mListView.getParent(); ViewGroup newContainer = (ViewGroup) view .findViewById(R.id.listViewPrefBarContainer); if (oldContainer != newContainer) { // remove the seekbar from the old view if (oldContainer != null) { ((ViewGroup) oldContainer).removeView(mListView); } // remove the existing seekbar (there may not be one) and add // ours newContainer.removeAllViews(); newContainer.addView(mListView, ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); } } catch (Exception ex) { Log.e(TAG, "Error binding view: " + ex.toString()); } updateView(view); } /** * Update a SeekBarPreference view with our current state * * @param view */ protected void updateView(View view) { try { RelativeLayout layout = (RelativeLayout) view; mStatusText = (TextView) layout .findViewById(R.id.listViewPrefValue); mStatusText.setText(String.valueOf(mCurrentValue)); mStatusText.setMinimumWidth(30); TextView unitsRight = (TextView) layout .findViewById(R.id.listViewPrefUnitsRight); unitsRight.setText(mUnitsRight); TextView unitsLeft = (TextView) layout .findViewById(R.id.listViewPrefUnitsLeft); unitsLeft.setText(mUnitsLeft); } catch (Exception e) { Log.e(TAG, "Error updating seek bar preference", e); } } @Override protected Object onGetDefaultValue(TypedArray ta, int index) { int defaultValue = ta.getInt(index, DEFAULT_VALUE); return defaultValue; } @Override protected void onSetInitialValue(boolean restoreValue, Object defaultValue) { if (restoreValue) { mCurrentValue = getPersistedInt(mCurrentValue); } else { int temp = 0; try { temp = (Integer) defaultValue; } catch (Exception ex) { Log.e(TAG, "Invalid default value: " + defaultValue.toString()); } persistInt(temp); mCurrentValue = temp; } } } ``` For most people this problem is the result of not having a constructor with parameters `Context` and `AttributeSet` but as you can see, I clearly have it. Here is the XML file where the error keeps on occurring: ``` <?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" xmlns:custom="http://schemas.android.com/apk/res/com.example.ebookreader" android:background="@drawable/wallpaper" > <android:PreferenceCategory android:key="device_settings" android:title="Device Settings" > <android:CheckBoxPreference android:key="wifi" android:summary="Enable or Disable Wi-Fi" android:title="Wi-Fi" /> <android:CheckBoxPreference android:key="bluetooth" android:summary="Enable or Disable Bluetooth" android:title="Bluetooth" /> <android:CheckBoxPreference android:key="autosync" android:summary="Enable or Disable AutoSync" android:title="AutoSync" /> <custom:SeekBarPreference android:id="@+id/brightness_adjust" android:defaultValue="100" android:key="brightness" android:max="200" android:summary="Adjust Brightness Levels" android:title="Brightness" /> </android:PreferenceCategory> <android:PreferenceCategory android:key="account_settings" android:title="Account Settings" > <custom:ListViewPreference> <!-- Error happens here --> android:id="@+id/font_selector" android:key="font" android:title="Font" android:summary="Edit Font" /> </custom:ListViewPreference> </android:PreferenceCategory> </PreferenceScreen> ``` Below is my full Logcat: ``` 03-14 17:53:14.290: E/AndroidRuntime(449): FATAL EXCEPTION: main 03-14 17:53:14.290: E/AndroidRuntime(449): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ebookreader/com.example.ebookreader.SettingsActivity}: android.view.InflateException: Binary XML file line #40: Error inflating class ListViewPreference 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1736) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1752) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.ActivityThread.access$1500(ActivityThread.java:123) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:993) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.os.Handler.dispatchMessage(Handler.java:99) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.os.Looper.loop(Looper.java:126) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.ActivityThread.main(ActivityThread.java:3997) 03-14 17:53:14.290: E/AndroidRuntime(449): at java.lang.reflect.Method.invokeNative(Native Method) 03-14 17:53:14.290: E/AndroidRuntime(449): at java.lang.reflect.Method.invoke(Method.java:491) 03-14 17:53:14.290: E/AndroidRuntime(449): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 03-14 17:53:14.290: E/AndroidRuntime(449): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 03-14 17:53:14.290: E/AndroidRuntime(449): at dalvik.system.NativeStart.main(Native Method) 03-14 17:53:14.290: E/AndroidRuntime(449): Caused by: android.view.InflateException: Binary XML file line #40: Error inflating class ListViewPreference 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:441) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.rInflate(GenericInflater.java:481) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.rInflate(GenericInflater.java:493) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.inflate(GenericInflater.java:326) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.inflate(GenericInflater.java:263) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:269) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:1333) 03-14 17:53:14.290: E/AndroidRuntime(449): at com.example.ebookreader.SettingsActivity.onCreate(SettingsActivity.java:31) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1700) 03-14 17:53:14.290: E/AndroidRuntime(449): ... 11 more 03-14 17:53:14.290: E/AndroidRuntime(449): Caused by: java.lang.ClassNotFoundException: android.preference.ListViewPreference in loader dalvik.system.PathClassLoader[/data/app/com.example.ebookreader-2.apk] 03-14 17:53:14.290: E/AndroidRuntime(449): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:251) 03-14 17:53:14.290: E/AndroidRuntime(449): at java.lang.ClassLoader.loadClass(ClassLoader.java:548) 03-14 17:53:14.290: E/AndroidRuntime(449): at java.lang.ClassLoader.loadClass(ClassLoader.java:508) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.createItem(GenericInflater.java:375) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.onCreateItem(GenericInflater.java:417) 03-14 17:53:14.290: E/AndroidRuntime(449): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:428) 03-14 17:53:14.290: E/AndroidRuntime(449): ... 20 more ``` Any help would be greatly appreciated.