am a28a05e9: Cleanup: Make some classes as final

* commit 'a28a05e971cc242b338331a3b78276fa95188d19':
  Cleanup: Make some classes as final

java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java

@@ -47,7 +47,7 @@ import com.android.inputmethod.latin.CollectionUtils;
  * virtual views, thus conveying their logical structure.
  * </p>
  */
-public class AccessibilityEntityProvider extends AccessibilityNodeProviderCompat {
+public final class AccessibilityEntityProvider extends AccessibilityNodeProviderCompat {
     private static final String TAG = AccessibilityEntityProvider.class.getSimpleName();
     private static final int UNDEFINED = Integer.MIN_VALUE;
 

java/src/com/android/inputmethod/accessibility/AccessibleKeyboardViewProxy.java

@@ -32,7 +32,7 @@ import com.android.inputmethod.keyboard.MainKeyboardView;
 import com.android.inputmethod.keyboard.PointerTracker;
 import com.android.inputmethod.latin.R;
 
-public class AccessibleKeyboardViewProxy extends AccessibilityDelegateCompat {
+public final class AccessibleKeyboardViewProxy extends AccessibilityDelegateCompat {
     private static final AccessibleKeyboardViewProxy sInstance = new AccessibleKeyboardViewProxy();
 
     private InputMethodService mInputMethod;

java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java

@@ -30,7 +30,7 @@ import com.android.inputmethod.latin.R;
 
 import java.util.HashMap;
 
-public class KeyCodeDescriptionMapper {
+public final class KeyCodeDescriptionMapper {
     private static final String TAG = KeyCodeDescriptionMapper.class.getSimpleName();
 
     // The resource ID of the string spoken for obscured keys

java/src/com/android/inputmethod/compat/AudioManagerCompatWrapper.java

@@ -20,7 +20,7 @@ import android.media.AudioManager;
 
 import java.lang.reflect.Method;
 
-public class AudioManagerCompatWrapper {
+public final class AudioManagerCompatWrapper {
     private static final Method METHOD_isWiredHeadsetOn = CompatUtils.getMethod(
             AudioManager.class, "isWiredHeadsetOn");
     private static final Method METHOD_isBluetoothA2dpOn = CompatUtils.getMethod(

java/src/com/android/inputmethod/compat/InputMethodManagerCompatWrapper.java

@@ -27,7 +27,7 @@ import java.lang.reflect.Method;
 
 // TODO: Override this class with the concrete implementation if we need to take care of the
 // performance.
-public class InputMethodManagerCompatWrapper {
+public final class InputMethodManagerCompatWrapper {
     private static final String TAG = InputMethodManagerCompatWrapper.class.getSimpleName();
     private static final Method METHOD_switchToNextInputMethod = CompatUtils.getMethod(
             InputMethodManager.class, "switchToNextInputMethod", IBinder.class, Boolean.TYPE);

java/src/com/android/inputmethod/keyboard/Key.java

@@ -138,7 +138,7 @@ public class Key implements Comparable<Key> {
 
     private final OptionalAttributes mOptionalAttributes;
 
-    private static class OptionalAttributes {
+    private static final class OptionalAttributes {
         /** Text to output when pressed. This can be multiple characters, like ".com" */
         public final String mOutputText;
         public final int mAltCode;

java/src/com/android/inputmethod/keyboard/KeyboardId.java

@@ -33,7 +33,7 @@ import java.util.Locale;
 /**
  * Unique identifier for each keyboard type.
  */
-public class KeyboardId {
+public final class KeyboardId {
     public static final int MODE_TEXT = 0;
     public static final int MODE_URL = 1;
     public static final int MODE_EMAIL = 2;

java/src/com/android/inputmethod/keyboard/KeyboardLayoutSet.java

@@ -61,7 +61,7 @@ import java.util.HashMap;
  * A {@link KeyboardLayoutSet} needs to be created for each
  * {@link android.view.inputmethod.EditorInfo}.
  */
-public class KeyboardLayoutSet {
+public final class KeyboardLayoutSet {
     private static final String TAG = KeyboardLayoutSet.class.getSimpleName();
     private static final boolean DEBUG_CACHE = LatinImeLogger.sDBG;
 
@@ -77,7 +77,7 @@ public class KeyboardLayoutSet {
             CollectionUtils.newHashMap();
     private static final KeysCache sKeysCache = new KeysCache();
 
-    public static class KeyboardLayoutSetException extends RuntimeException {
+    public static final class KeyboardLayoutSetException extends RuntimeException {
         public final KeyboardId mKeyboardId;
 
         public KeyboardLayoutSetException(final Throwable cause, final KeyboardId keyboardId) {
@@ -86,13 +86,13 @@ public class KeyboardLayoutSet {
         }
     }
 
-    private static class ElementParams {
+    private static final class ElementParams {
         int mKeyboardXmlId;
         boolean mProximityCharsCorrectionEnabled;
         public ElementParams() {}
     }
 
-    private static class Params {
+    private static final class Params {
         String mKeyboardLayoutSetName;
         int mMode;
         EditorInfo mEditorInfo;
@@ -203,7 +203,7 @@ public class KeyboardLayoutSet {
                 params.mLanguageSwitchKeyEnabled);
     }
 
-    public static class Builder {
+    public static final class Builder {
         private final Context mContext;
         private final String mPackageName;
         private final Resources mResources;

java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java

@@ -39,12 +39,12 @@ import com.android.inputmethod.latin.SettingsValues;
 import com.android.inputmethod.latin.SubtypeSwitcher;
 import com.android.inputmethod.latin.WordComposer;
 
-public class KeyboardSwitcher implements KeyboardState.SwitchActions {
+public final class KeyboardSwitcher implements KeyboardState.SwitchActions {
     private static final String TAG = KeyboardSwitcher.class.getSimpleName();
 
     public static final String PREF_KEYBOARD_LAYOUT = "pref_keyboard_layout_20110916";
 
-    static class KeyboardTheme {
+    static final class KeyboardTheme {
         public final int mThemeId;
         public final int mStyleId;
 

java/src/com/android/inputmethod/keyboard/MainKeyboardView.java

@@ -83,7 +83,7 @@ import java.util.WeakHashMap;
  * @attr ref R.styleable#MainKeyboardView_ignoreAltCodeKeyTimeout
  * @attr ref R.styleable#MainKeyboardView_showMoreKeysKeyboardAtTouchPoint
  */
-public class MainKeyboardView extends KeyboardView implements PointerTracker.KeyEventHandler,
+public final class MainKeyboardView extends KeyboardView implements PointerTracker.KeyEventHandler,
         SuddenJumpingTouchEventHandler.ProcessMotionEvent {
     private static final String TAG = MainKeyboardView.class.getSimpleName();
 
@@ -136,7 +136,7 @@ public class MainKeyboardView extends KeyboardView implements PointerTracker.Key
 
     private final KeyTimerHandler mKeyTimerHandler;
 
-    private static class KeyTimerHandler extends StaticInnerHandlerWrapper<MainKeyboardView>
+    private static final class KeyTimerHandler extends StaticInnerHandlerWrapper<MainKeyboardView>
             implements TimerProxy {
         private static final int MSG_TYPING_STATE_EXPIRED = 0;
         private static final int MSG_REPEAT_KEY = 1;

java/src/com/android/inputmethod/keyboard/MoreKeysDetector.java

@@ -16,7 +16,7 @@
 
 package com.android.inputmethod.keyboard;
 
-public class MoreKeysDetector extends KeyDetector {
+public final class MoreKeysDetector extends KeyDetector {
     private final int mSlideAllowanceSquare;
     private final int mSlideAllowanceSquareTop;
 

java/src/com/android/inputmethod/keyboard/MoreKeysKeyboard.java

@@ -27,7 +27,7 @@ import com.android.inputmethod.keyboard.internal.MoreKeySpec;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.StringUtils;
 
-public class MoreKeysKeyboard extends Keyboard {
+public final class MoreKeysKeyboard extends Keyboard {
     private final int mDefaultKeyCoordX;
 
     MoreKeysKeyboard(final MoreKeysKeyboardParams params) {

java/src/com/android/inputmethod/keyboard/MoreKeysKeyboardView.java

@@ -33,7 +33,7 @@ import com.android.inputmethod.latin.R;
  * A view that renders a virtual {@link MoreKeysKeyboard}. It handles rendering of keys and
  * detecting key presses and touch movements.
  */
-public class MoreKeysKeyboardView extends KeyboardView implements MoreKeysPanel {
+public final class MoreKeysKeyboardView extends KeyboardView implements MoreKeysPanel {
     private final int[] mCoordinates = new int[2];
 
     private final KeyDetector mKeyDetector;

java/src/com/android/inputmethod/keyboard/PointerTracker.java

@@ -34,7 +34,7 @@ import com.android.inputmethod.research.ResearchLogger;
 
 import java.util.ArrayList;
 
-public class PointerTracker implements PointerTrackerQueue.Element {
+public final class PointerTracker implements PointerTrackerQueue.Element {
     private static final String TAG = PointerTracker.class.getSimpleName();
     private static final boolean DEBUG_EVENT = false;
     private static final boolean DEBUG_MOVE_EVENT = false;
@@ -121,7 +121,7 @@ public class PointerTracker implements PointerTrackerQueue.Element {
         }
     }
 
-    static class PointerTrackerParams {
+    static final class PointerTrackerParams {
         public final boolean mSlidingKeyInputEnabled;
         public final int mTouchNoiseThresholdTime;
         public final float mTouchNoiseThresholdDistance;

java/src/com/android/inputmethod/keyboard/internal/AlphabetShiftState.java

@@ -18,7 +18,7 @@ package com.android.inputmethod.keyboard.internal;
 
 import android.util.Log;
 
-public class AlphabetShiftState {
+public final class AlphabetShiftState {
     private static final String TAG = AlphabetShiftState.class.getSimpleName();
     private static final boolean DEBUG = false;
 

java/src/com/android/inputmethod/keyboard/internal/GestureStrokeWithPreviewPoints.java

@@ -16,7 +16,7 @@ package com.android.inputmethod.keyboard.internal;
 
 import com.android.inputmethod.latin.ResizableIntArray;
 
-public class GestureStrokeWithPreviewPoints extends GestureStroke {
+public final class GestureStrokeWithPreviewPoints extends GestureStroke {
     public static final int PREVIEW_CAPACITY = 256;
 
     private final ResizableIntArray mPreviewEventTimes = new ResizableIntArray(PREVIEW_CAPACITY);

java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java

@@ -46,7 +46,7 @@ import java.util.Locale;
  * Note that the '\' is also parsed by XML parser and CSV parser as well.
  * See {@link KeyboardIconsSet} about icon_name.
  */
-public class KeySpecParser {
+public final class KeySpecParser {
     private static final boolean DEBUG = LatinImeLogger.sDBG;
 
     private static final int MAX_STRING_REFERENCE_INDIRECTION = 10;
@@ -318,7 +318,7 @@ public class KeySpecParser {
     }
 
     @SuppressWarnings("serial")
-    public static class KeySpecParserError extends RuntimeException {
+    public static final class KeySpecParserError extends RuntimeException {
         public KeySpecParserError(final String message) {
             super(message);
         }

java/src/com/android/inputmethod/keyboard/internal/KeyStylesSet.java

@@ -29,7 +29,7 @@ import org.xmlpull.v1.XmlPullParserException;
 
 import java.util.HashMap;
 
-public class KeyStylesSet {
+public final class KeyStylesSet {
     private static final String TAG = KeyStylesSet.class.getSimpleName();
     private static final boolean DEBUG = false;
 
@@ -45,7 +45,7 @@ public class KeyStylesSet {
         mStyles.put(EMPTY_STYLE_NAME, mEmptyKeyStyle);
     }
 
-    private static class EmptyKeyStyle extends KeyStyle {
+    private static final class EmptyKeyStyle extends KeyStyle {
         EmptyKeyStyle(final KeyboardTextsSet textsSet) {
             super(textsSet);
         }
@@ -71,7 +71,7 @@ public class KeyStylesSet {
         }
     }
 
-    private static class DeclaredKeyStyle extends KeyStyle {
+    private static final class DeclaredKeyStyle extends KeyStyle {
         private final HashMap<String, KeyStyle> mStyles;
         private final String mParentStyleName;
         private final SparseArray<Object> mStyleAttributes = CollectionUtils.newSparseArray();

java/src/com/android/inputmethod/keyboard/internal/KeyVisualAttributes.java

@@ -23,7 +23,7 @@ import android.util.SparseIntArray;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.ResourceUtils;
 
-public class KeyVisualAttributes {
+public final class KeyVisualAttributes {
     public final Typeface mTypeface;
 
     public final float mLetterRatio;

java/src/com/android/inputmethod/keyboard/internal/KeyboardCodesSet.java

@@ -21,7 +21,7 @@ import com.android.inputmethod.latin.CollectionUtils;
 
 import java.util.HashMap;
 
-public class KeyboardCodesSet {
+public final class KeyboardCodesSet {
     private static final HashMap<String, int[]> sLanguageToCodesMap = CollectionUtils.newHashMap();
     private static final HashMap<String, Integer> sNameToIdMap = CollectionUtils.newHashMap();
 

java/src/com/android/inputmethod/keyboard/internal/KeyboardIconsSet.java

@@ -27,7 +27,7 @@ import com.android.inputmethod.latin.R;
 
 import java.util.HashMap;
 
-public class KeyboardIconsSet {
+public final class KeyboardIconsSet {
     private static final String TAG = KeyboardIconsSet.class.getSimpleName();
 
     public static final int ICON_UNDEFINED = 0;

java/src/com/android/inputmethod/keyboard/internal/KeyboardRow.java

@@ -32,7 +32,7 @@ import org.xmlpull.v1.XmlPullParser;
  * Some of the key size defaults can be overridden per row from what the {@link Keyboard}
  * defines.
  */
-public class KeyboardRow {
+public final class KeyboardRow {
     // keyWidth enum constants
     private static final int KEYWIDTH_NOT_ENUM = 0;
     private static final int KEYWIDTH_FILL_RIGHT = -1;

java/src/com/android/inputmethod/keyboard/internal/KeyboardState.java

@@ -34,7 +34,7 @@ import com.android.inputmethod.latin.Constants;
  *
  * The actions are {@link SwitchActions}'s methods.
  */
-public class KeyboardState {
+public final class KeyboardState {
     private static final String TAG = KeyboardState.class.getSimpleName();
     private static final boolean DEBUG_EVENT = false;
     private static final boolean DEBUG_ACTION = false;
@@ -92,7 +92,7 @@ public class KeyboardState {
 
     private final SavedKeyboardState mSavedKeyboardState = new SavedKeyboardState();
 
-    static class SavedKeyboardState {
+    static final class SavedKeyboardState {
         public boolean mIsValid;
         public boolean mIsAlphabetMode;
         public boolean mIsAlphabetShiftLocked;

java/src/com/android/inputmethod/keyboard/internal/KeysCache.java

@@ -21,7 +21,7 @@ import com.android.inputmethod.latin.CollectionUtils;
 
 import java.util.HashMap;
 
-public class KeysCache {
+public final class KeysCache {
     private final HashMap<Key, Key> mMap = CollectionUtils.newHashMap();
 
     public void clear() {

java/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueue.java

@@ -22,7 +22,7 @@ import com.android.inputmethod.latin.CollectionUtils;
 
 import java.util.ArrayList;
 
-public class PointerTrackerQueue {
+public final class PointerTrackerQueue {
     private static final String TAG = PointerTrackerQueue.class.getSimpleName();
     private static final boolean DEBUG = false;
 

java/src/com/android/inputmethod/keyboard/internal/PreviewPlacerView.java

@@ -39,7 +39,7 @@ import com.android.inputmethod.latin.CollectionUtils;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.StaticInnerHandlerWrapper;
 
-public class PreviewPlacerView extends RelativeLayout {
+public final class PreviewPlacerView extends RelativeLayout {
     // The height of extra area above the keyboard to draw gesture trails.
     // Proportional to the keyboard height.
     private static final float EXTRA_GESTURE_TRAIL_AREA_ABOVE_KEYBOARD_RATIO = 0.25f;
@@ -79,7 +79,7 @@ public class PreviewPlacerView extends RelativeLayout {
 
     private final DrawingHandler mDrawingHandler;
 
-    private static class DrawingHandler extends StaticInnerHandlerWrapper<PreviewPlacerView> {
+    private static final class DrawingHandler extends StaticInnerHandlerWrapper<PreviewPlacerView> {
         private static final int MSG_DISMISS_GESTURE_FLOATING_PREVIEW_TEXT = 0;
         private static final int MSG_UPDATE_GESTURE_PREVIEW_TRAIL = 1;
 

java/src/com/android/inputmethod/keyboard/internal/ShiftKeyState.java

@@ -18,7 +18,7 @@ package com.android.inputmethod.keyboard.internal;
 
 import android.util.Log;
 
-/* package */ class ShiftKeyState extends ModifierKeyState {
+/* package */ final class ShiftKeyState extends ModifierKeyState {
     private static final int PRESSING_ON_SHIFTED = 3; // both temporary shifted & shift locked
     private static final int IGNORING = 4;
 

java/src/com/android/inputmethod/keyboard/internal/SuddenJumpingTouchEventHandler.java

@@ -28,7 +28,7 @@ import com.android.inputmethod.latin.ResourceUtils;
 import com.android.inputmethod.latin.define.ProductionFlag;
 import com.android.inputmethod.research.ResearchLogger;
 
-public class SuddenJumpingTouchEventHandler {
+public final class SuddenJumpingTouchEventHandler {
     private static final String TAG = SuddenJumpingTouchEventHandler.class.getSimpleName();
     private static boolean DEBUG_MODE = LatinImeLogger.sDBG;
 

java/src/com/android/inputmethod/latin/AdditionalSubtypeSettings.java

@@ -49,7 +49,7 @@ import com.android.inputmethod.compat.CompatUtils;
 import java.util.ArrayList;
 import java.util.TreeSet;
 
-public class AdditionalSubtypeSettings extends PreferenceFragment {
+public final class AdditionalSubtypeSettings extends PreferenceFragment {
     private SharedPreferences mPrefs;
     private SubtypeLocaleAdapter mSubtypeLocaleAdapter;
     private KeyboardLayoutSetAdapter mKeyboardLayoutSetAdapter;

java/src/com/android/inputmethod/latin/AssetFileAddress.java

@@ -24,7 +24,7 @@ import java.io.File;
  * the package file. Open it correctly thus requires the name of the package it is in, but
  * also the offset in the file and the length of this data. This class encapsulates these three.
  */
-class AssetFileAddress {
+final class AssetFileAddress {
     public final String mFilename;
     public final long mOffset;
     public final long mLength;

java/src/com/android/inputmethod/latin/AudioAndHapticFeedbackManager.java

@@ -30,7 +30,7 @@ import com.android.inputmethod.latin.VibratorUtils;
  * It offers a consistent and simple interface that allows LatinIME to forget about the
  * complexity of settings and the like.
  */
-public class AudioAndHapticFeedbackManager {
+public final class AudioAndHapticFeedbackManager {
     final private SettingsValues mSettingsValues;
     final private AudioManager mAudioManager;
     final private VibratorUtils mVibratorUtils;

java/src/com/android/inputmethod/latin/AutoCorrection.java

@@ -23,7 +23,7 @@ import android.util.Log;
 
 import java.util.concurrent.ConcurrentHashMap;
 
-public class AutoCorrection {
+public final class AutoCorrection {
     private static final boolean DBG = LatinImeLogger.sDBG;
     private static final String TAG = AutoCorrection.class.getSimpleName();
     private static final int MINIMUM_SAFETY_NET_CHAR_LENGTH = 4;

java/src/com/android/inputmethod/latin/BackupAgent.java

@@ -22,7 +22,7 @@ import android.app.backup.SharedPreferencesBackupHelper;
 /**
  * Backs up the Latin IME shared preferences.
  */
-public class BackupAgent extends BackupAgentHelper {
+public final class BackupAgent extends BackupAgentHelper {
 
     @Override
     public void onCreate() {

java/src/com/android/inputmethod/latin/BinaryDictionary.java

@@ -30,7 +30,7 @@ import java.util.Locale;
 /**
  * Implements a static, compacted, binary dictionary of standard words.
  */
-public class BinaryDictionary extends Dictionary {
+public final class BinaryDictionary extends Dictionary {
 
     public static final String DICTIONARY_PACK_AUTHORITY =
             "com.android.inputmethod.latin.dictionarypack";

java/src/com/android/inputmethod/latin/BinaryDictionaryFileDumper.java

@@ -30,7 +30,6 @@ import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
@@ -40,7 +39,7 @@ import java.util.Locale;
  * Group class for static methods to help with creation and getting of the binary dictionary
  * file from the dictionary provider
  */
-public class BinaryDictionaryFileDumper {
+public final class BinaryDictionaryFileDumper {
     private static final String TAG = BinaryDictionaryFileDumper.class.getSimpleName();
     private static final boolean DEBUG = false;
 

java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java

@@ -37,7 +37,7 @@ import java.util.Locale;
 /**
  * Helper class to get the address of a mmap'able dictionary file.
  */
-class BinaryDictionaryGetter {
+final class BinaryDictionaryGetter {
 
     /**
      * Used for Log actions from this class
@@ -178,7 +178,7 @@ class BinaryDictionaryGetter {
                 context.getApplicationInfo().sourceDir, afd.getStartOffset(), afd.getLength());
     }
 
-    static private class DictPackSettings {
+    private static final class DictPackSettings {
         final SharedPreferences mDictPreferences;
         public DictPackSettings(final Context context) {
             Context dictPackContext = null;
@@ -237,7 +237,7 @@ class BinaryDictionaryGetter {
     /**
      * Utility class for the {@link #getCachedWordLists} method
      */
-    private static class FileAndMatchLevel {
+    private static final class FileAndMatchLevel {
         final File mFile;
         final int mMatchLevel;
         public FileAndMatchLevel(final File file, final int matchLevel) {

java/src/com/android/inputmethod/latin/BoundedTreeSet.java

@@ -25,7 +25,7 @@ import java.util.TreeSet;
 /**
  * A TreeSet that is bounded in size and throws everything that's smaller than its limit
  */
-public class BoundedTreeSet extends TreeSet<SuggestedWordInfo> {
+public final class BoundedTreeSet extends TreeSet<SuggestedWordInfo> {
     private final int mCapacity;
     public BoundedTreeSet(final Comparator<SuggestedWordInfo> comparator, final int capacity) {
         super(comparator);

java/src/com/android/inputmethod/latin/DebugSettings.java

@@ -30,7 +30,7 @@ import android.util.Log;
 import com.android.inputmethod.keyboard.KeyboardSwitcher;
 import com.android.inputmethod.research.ResearchLogger;
 
-public class DebugSettings extends PreferenceFragment
+public final class DebugSettings extends PreferenceFragment
         implements SharedPreferences.OnSharedPreferenceChangeListener {
 
     private static final String TAG = DebugSettings.class.getSimpleName();

java/src/com/android/inputmethod/latin/DebugSettingsActivity.java

@@ -20,7 +20,7 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.preference.PreferenceActivity;
 
-public class DebugSettingsActivity extends PreferenceActivity {
+public final class DebugSettingsActivity extends PreferenceActivity {
     @Override
     public Intent getIntent() {
         final Intent modIntent = new Intent(super.getIntent());

java/src/com/android/inputmethod/latin/DicTraverseSession.java

@@ -18,7 +18,7 @@ package com.android.inputmethod.latin;
 
 import java.util.Locale;
 
-public class DicTraverseSession {
+public final class DicTraverseSession {
     static {
         JniUtils.loadNativeLibrary();
     }

java/src/com/android/inputmethod/latin/DictionaryCollection.java

@@ -29,7 +29,7 @@ import java.util.concurrent.CopyOnWriteArrayList;
 /**
  * Class for a collection of dictionaries that behave like one dictionary.
  */
-public class DictionaryCollection extends Dictionary {
+public final class DictionaryCollection extends Dictionary {
     private final String TAG = DictionaryCollection.class.getSimpleName();
     protected final CopyOnWriteArrayList<Dictionary> mDictionaries;
 

java/src/com/android/inputmethod/latin/DictionaryFactory.java

@@ -29,7 +29,7 @@ import java.util.Locale;
 /**
  * Factory for dictionary instances.
  */
-public class DictionaryFactory {
+public final class DictionaryFactory {
     private static final String TAG = DictionaryFactory.class.getSimpleName();
     // This class must be located in the same package as LatinIME.java.
     private static final String RESOURCE_PACKAGE_NAME =

java/src/com/android/inputmethod/latin/DictionaryPackInstallBroadcastReceiver.java

@@ -27,7 +27,7 @@ import android.net.Uri;
 /**
  * Takes action to reload the necessary data when a dictionary pack was added/removed.
  */
-public class DictionaryPackInstallBroadcastReceiver extends BroadcastReceiver {
+public final class DictionaryPackInstallBroadcastReceiver extends BroadcastReceiver {
 
     final LatinIME mService;
     /**

java/src/com/android/inputmethod/latin/ExpandableDictionary.java

@@ -48,7 +48,7 @@ public class ExpandableDictionary extends Dictionary {
     // Use this lock before touching mUpdatingDictionary & mRequiresDownload
     private Object mUpdatingLock = new Object();
 
-    private static class Node {
+    private static final class Node {
         Node() {}
         char mCode;
         int mFrequency;
@@ -60,7 +60,7 @@ public class ExpandableDictionary extends Dictionary {
         LinkedList<NextWord> mNGrams; // Supports ngram
     }
 
-    private static class NodeArray {
+    private static final class NodeArray {
         Node[] mData;
         int mLength = 0;
         private static final int INCREMENT = 2;
@@ -88,7 +88,7 @@ public class ExpandableDictionary extends Dictionary {
         public int notifyTypedAgainAndGetFrequency();
     }
 
-    private static class NextStaticWord implements NextWord {
+    private static final class NextStaticWord implements NextWord {
         public final Node mWord;
         private final int mFrequency;
         public NextStaticWord(Node word, int frequency) {
@@ -117,7 +117,7 @@ public class ExpandableDictionary extends Dictionary {
         }
     }
 
-    private static class NextHistoryWord implements NextWord {
+    private static final class NextHistoryWord implements NextWord {
         public final Node mWord;
         public final ForgettingCurveParams mFcp;
 
@@ -703,7 +703,7 @@ public class ExpandableDictionary extends Dictionary {
         mRoots = new NodeArray();
     }
 
-    private class LoadDictionaryTask extends Thread {
+    private final class LoadDictionaryTask extends Thread {
         LoadDictionaryTask() {}
         @Override
         public void run() {

java/src/com/android/inputmethod/latin/FileTransforms.java

@@ -21,7 +21,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.zip.GZIPInputStream;
 
-public class FileTransforms {
+public final class FileTransforms {
     public static OutputStream getCryptedStream(OutputStream out) {
         // Crypt the stream.
         return out;

java/src/com/android/inputmethod/latin/InputAttributes.java

@@ -23,7 +23,7 @@ import android.view.inputmethod.EditorInfo;
 /**
  * Class to hold attributes of the input field.
  */
-public class InputAttributes {
+public final class InputAttributes {
     private final String TAG = InputAttributes.class.getSimpleName();
 
     final public boolean mInputTypeNoAutoCorrect;

java/src/com/android/inputmethod/latin/InputPointers.java

@@ -17,7 +17,7 @@
 package com.android.inputmethod.latin;
 
 // TODO: This class is not thread-safe.
-public class InputPointers {
+public final class InputPointers {
     private final int mDefaultCapacity;
     private final ResizableIntArray mXCoordinates;
     private final ResizableIntArray mYCoordinates;

java/src/com/android/inputmethod/latin/InputView.java

@@ -23,7 +23,7 @@ import android.view.MotionEvent;
 import android.view.View;
 import android.widget.LinearLayout;
 
-public class InputView extends LinearLayout {
+public final class InputView extends LinearLayout {
     private View mSuggestionStripContainer;
     private View mKeyboardView;
     private int mKeyboardTopPadding;

java/src/com/android/inputmethod/latin/LastComposedWord.java

@@ -22,7 +22,7 @@ import android.text.TextUtils;
  * This class encapsulates data about a word previously composed, but that has been
  * committed already. This is used for resuming suggestion, and cancel auto-correction.
  */
-public class LastComposedWord {
+public final class LastComposedWord {
     // COMMIT_TYPE_USER_TYPED_WORD is used when the word committed is the exact typed word, with
     // no hinting from the IME. It happens when some external event happens (rotating the device,
     // for example) or when auto-correction is off by settings or editor attributes.

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -85,7 +85,7 @@ import java.util.Locale;
 /**
  * Input method implementation for Qwerty'ish keyboard.
  */
-public class LatinIME extends InputMethodService implements KeyboardActionListener,
+public final class LatinIME extends InputMethodService implements KeyboardActionListener,
         SuggestionStripView.Listener, TargetApplicationGetter.OnTargetApplicationKnownListener,
         Suggest.SuggestInitializationListener {
     private static final String TAG = LatinIME.class.getSimpleName();
@@ -183,7 +183,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
 
     public final UIHandler mHandler = new UIHandler(this);
 
-    public static class UIHandler extends StaticInnerHandlerWrapper<LatinIME> {
+    public static final class UIHandler extends StaticInnerHandlerWrapper<LatinIME> {
         private static final int MSG_UPDATE_SHIFT_STATE = 0;
         private static final int MSG_PENDING_IMS_CALLBACK = 1;
         private static final int MSG_UPDATE_SUGGESTION_STRIP = 2;

java/src/com/android/inputmethod/latin/LatinImeLogger.java

@@ -21,7 +21,7 @@ import android.view.inputmethod.EditorInfo;
 
 import com.android.inputmethod.keyboard.Keyboard;
 
-public class LatinImeLogger implements SharedPreferences.OnSharedPreferenceChangeListener {
+public final class LatinImeLogger implements SharedPreferences.OnSharedPreferenceChangeListener {
 
     public static boolean sDBG = false;
     public static boolean sVISUALDEBUG = false;

java/src/com/android/inputmethod/latin/ResizableIntArray.java

@@ -19,7 +19,7 @@ package com.android.inputmethod.latin;
 import java.util.Arrays;
 
 // TODO: This class is not thread-safe.
-public class ResizableIntArray {
+public final class ResizableIntArray {
     private int[] mArray;
     private int mLength;
 

java/src/com/android/inputmethod/latin/RichInputConnection.java

@@ -41,7 +41,7 @@ import java.util.regex.Pattern;
  * all the time to find out what text is in the buffer, when we need it to determine caps mode
  * for example.
  */
-public class RichInputConnection {
+public final class RichInputConnection {
     private static final String TAG = RichInputConnection.class.getSimpleName();
     private static final boolean DBG = false;
     private static final boolean DEBUG_PREVIOUS_TEXT = false;
@@ -415,7 +415,7 @@ public class RichInputConnection {
     /**
      * Represents a range of text, relative to the current cursor position.
      */
-    public static class Range {
+    public static final class Range {
         /** Characters before selection start */
         public final int mCharsBefore;
 

java/src/com/android/inputmethod/latin/SettingsActivity.java

@@ -19,7 +19,7 @@ package com.android.inputmethod.latin;
 import android.content.Intent;
 import android.preference.PreferenceActivity;
 
-public class SettingsActivity extends PreferenceActivity {
+public final class SettingsActivity extends PreferenceActivity {
     private static final String DEFAULT_FRAGMENT = Settings.class.getName();
 
     @Override

java/src/com/android/inputmethod/latin/SubtypeLocale.java

@@ -30,7 +30,7 @@ import com.android.inputmethod.latin.LocaleUtils.RunInLocale;
 import java.util.HashMap;
 import java.util.Locale;
 
-public class SubtypeLocale {
+public final class SubtypeLocale {
     static final String TAG = SubtypeLocale.class.getSimpleName();
     // This class must be located in the same package as LatinIME.java.
     private static final String RESOURCE_PACKAGE_NAME =

java/src/com/android/inputmethod/latin/SubtypeSwitcher.java

@@ -38,7 +38,7 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 
-public class SubtypeSwitcher {
+public final class SubtypeSwitcher {
     private static boolean DBG = LatinImeLogger.sDBG;
     private static final String TAG = SubtypeSwitcher.class.getSimpleName();
 
@@ -60,7 +60,7 @@ public class SubtypeSwitcher {
 
     private boolean mIsNetworkConnected;
 
-    static class NeedsToDisplayLanguage {
+    static final class NeedsToDisplayLanguage {
         private int mEnabledSubtypeCount;
         private boolean mIsSystemLanguageSameAsInputLanguage;
 

java/src/com/android/inputmethod/latin/Suggest.java

@@ -34,7 +34,7 @@ import java.util.concurrent.ConcurrentHashMap;
  * This class loads a dictionary and provides a list of suggestions for a given sequence of
  * characters. This includes corrections and completions.
  */
-public class Suggest {
+public final class Suggest {
     public static final String TAG = Suggest.class.getSimpleName();
 
     // Session id for
@@ -362,7 +362,8 @@ public class Suggest {
         return suggestionsList;
     }
 
-    private static class SuggestedWordInfoComparator implements Comparator<SuggestedWordInfo> {
+    private static final class SuggestedWordInfoComparator
+            implements Comparator<SuggestedWordInfo> {
         // This comparator ranks the word info with the higher frequency first. That's because
         // that's the order we want our elements in.
         @Override

java/src/com/android/inputmethod/latin/SuggestedWords.java

@@ -23,7 +23,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashSet;
 
-public class SuggestedWords {
+public final class SuggestedWords {
     private static final ArrayList<SuggestedWordInfo> EMPTY_WORD_INFO_LIST =
             CollectionUtils.newArrayList(0);
     public static final SuggestedWords EMPTY = new SuggestedWords(
@@ -117,7 +117,7 @@ public class SuggestedWords {
         return suggestionsList;
     }
 
-    public static class SuggestedWordInfo {
+    public static final class SuggestedWordInfo {
         public static final int MAX_SCORE = Integer.MAX_VALUE;
         public static final int KIND_TYPED = 0; // What user typed
         public static final int KIND_CORRECTION = 1; // Simple correction/suggestion

java/src/com/android/inputmethod/latin/SuggestionSpanPickedNotificationReceiver.java

@@ -23,7 +23,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.util.Log;
 
-public class SuggestionSpanPickedNotificationReceiver extends BroadcastReceiver {
+public final class SuggestionSpanPickedNotificationReceiver extends BroadcastReceiver {
     private static final boolean DBG = LatinImeLogger.sDBG;
     private static final String TAG =
             SuggestionSpanPickedNotificationReceiver.class.getSimpleName();

java/src/com/android/inputmethod/latin/SynchronouslyLoadedContactsBinaryDictionary.java

@@ -24,7 +24,7 @@ import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import java.util.ArrayList;
 import java.util.Locale;
 
-public class SynchronouslyLoadedContactsBinaryDictionary extends ContactsBinaryDictionary {
+public final class SynchronouslyLoadedContactsBinaryDictionary extends ContactsBinaryDictionary {
     private boolean mClosed;
 
     public SynchronouslyLoadedContactsBinaryDictionary(final Context context, final Locale locale) {

java/src/com/android/inputmethod/latin/SynchronouslyLoadedUserBinaryDictionary.java

@@ -23,7 +23,7 @@ import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 
 import java.util.ArrayList;
 
-public class SynchronouslyLoadedUserBinaryDictionary extends UserBinaryDictionary {
+public final class SynchronouslyLoadedUserBinaryDictionary extends UserBinaryDictionary {
 
     public SynchronouslyLoadedUserBinaryDictionary(final Context context, final String locale) {
         this(context, locale, false);

java/src/com/android/inputmethod/latin/TargetApplicationGetter.java

@@ -22,8 +22,7 @@ import android.content.pm.PackageManager;
 import android.os.AsyncTask;
 import android.util.LruCache;
 
-public class TargetApplicationGetter extends AsyncTask<String, Void, ApplicationInfo> {
+public final class TargetApplicationGetter extends AsyncTask<String, Void, ApplicationInfo> {
-
     private static final int MAX_CACHE_ENTRIES = 64; // arbitrary
     private static LruCache<String, ApplicationInfo> sCache =
             new LruCache<String, ApplicationInfo>(MAX_CACHE_ENTRIES);
@@ -32,6 +31,7 @@ public class TargetApplicationGetter extends AsyncTask<String, Void, Application
         if (null == packageName) return null;
         return sCache.get(packageName);
     }
+
     public static void removeApplicationInfoCache(final String packageName) {
         sCache.remove(packageName);
     }

java/src/com/android/inputmethod/latin/UserHistoryDictIOUtils.java

@@ -38,7 +38,7 @@ import java.util.Map;
  *
  * All the methods in this class are static.
  */
-public class UserHistoryDictIOUtils {
+public final class UserHistoryDictIOUtils {
     private static final String TAG = UserHistoryDictIOUtils.class.getSimpleName();
     private static final boolean DEBUG = false;
 

java/src/com/android/inputmethod/latin/UserHistoryDictionary.java

@@ -42,7 +42,7 @@ import java.util.concurrent.locks.ReentrantLock;
  * Locally gathers stats about the words user types and various other signals like auto-correction
  * cancellation or manual picks. This allows the keyboard to adapt to the typist over time.
  */
-public class UserHistoryDictionary extends ExpandableDictionary {
+public final class UserHistoryDictionary extends ExpandableDictionary {
     private static final String TAG = UserHistoryDictionary.class.getSimpleName();
     private static final String NAME = UserHistoryDictionary.class.getSimpleName();
     public static final boolean DBG_SAVE_RESTORE = false;
@@ -283,7 +283,7 @@ public class UserHistoryDictionary extends ExpandableDictionary {
     /**
      * Async task to write pending words to the binarydicts.
      */
-    private static class UpdateBinaryTask extends AsyncTask<Void, Void, Void>
+    private static final class UpdateBinaryTask extends AsyncTask<Void, Void, Void>
             implements BigramDictionaryInterface {
         private final UserHistoryDictionaryBigramList mBigramList;
         private final boolean mAddLevel0Bigrams;

java/src/com/android/inputmethod/latin/UserHistoryDictionaryBigramList.java

@@ -26,7 +26,7 @@ import java.util.Set;
  * All bigrams including stale ones in SQL DB should be stored in this class to avoid adding stale
  * bigrams when we write to the SQL DB.
  */
-public class UserHistoryDictionaryBigramList {
+public final class UserHistoryDictionaryBigramList {
     public static final byte FORGETTING_CURVE_INITIAL_VALUE = 0;
     private static final String TAG = UserHistoryDictionaryBigramList.class.getSimpleName();
     private static final HashMap<String, Byte> EMPTY_BIGRAM_MAP = CollectionUtils.newHashMap();

java/src/com/android/inputmethod/latin/UserHistoryForgettingCurveUtils.java

@@ -36,7 +36,7 @@ public final class UserHistoryForgettingCurveUtils {
         // This utility class is not publicly instantiable.
     }
 
-    public static class ForgettingCurveParams {
+    public static final class ForgettingCurveParams {
         private byte mFc;
         long mLastTouchedTime = 0;
         private final boolean mIsValid;
@@ -195,7 +195,7 @@ public final class UserHistoryForgettingCurveUtils {
         return (elapsedTime < ELAPSED_TIME_MAX - 1 || level > 0);
     }
 
-    private static class MathUtils {
+    private static final class MathUtils {
         public static final int[][] SCORE_TABLE = new int[FC_LEVEL_MAX][ELAPSED_TIME_MAX + 1];
         static {
             for (int i = 0; i < FC_LEVEL_MAX; ++i) {

java/src/com/android/inputmethod/latin/WordComposer.java

@@ -24,7 +24,7 @@ import java.util.Arrays;
 /**
  * A place to store the currently composing word with information such as adjacent key codes as well
  */
-public class WordComposer {
+public final class WordComposer {
     private static final int N = BinaryDictionary.MAX_WORD_LENGTH;
 
     public static final int CAPS_MODE_OFF = 0;

java/src/com/android/inputmethod/latin/WordListInfo.java

@@ -19,7 +19,7 @@ package com.android.inputmethod.latin;
 /**
  * Information container for a word list.
  */
-public class WordListInfo {
+public final class WordListInfo {
     public final String mId;
     public final String mLocale;
     public WordListInfo(final String id, final String locale) {

java/src/com/android/inputmethod/latin/XmlParseUtils.java

@@ -36,28 +36,28 @@ public final class XmlParseUtils {
     }
 
     @SuppressWarnings("serial")
-    public static class IllegalStartTag extends ParseException {
+    public static final class IllegalStartTag extends ParseException {
         public IllegalStartTag(XmlPullParser parser, String parent) {
             super("Illegal start tag " + parser.getName() + " in " + parent, parser);
         }
     }
 
     @SuppressWarnings("serial")
-    public static class IllegalEndTag extends ParseException {
+    public static final class IllegalEndTag extends ParseException {
         public IllegalEndTag(XmlPullParser parser, String parent) {
             super("Illegal end tag " + parser.getName() + " in " + parent, parser);
         }
     }
 
     @SuppressWarnings("serial")
-    public static class IllegalAttribute extends ParseException {
+    public static final class IllegalAttribute extends ParseException {
         public IllegalAttribute(XmlPullParser parser, String attribute) {
             super("Tag " + parser.getName() + " has illegal attribute " + attribute, parser);
         }
     }
 
     @SuppressWarnings("serial")
-    public static class NonEmptyTag extends ParseException{
+    public static final class NonEmptyTag extends ParseException{
         public NonEmptyTag(String tag, XmlPullParser parser) {
             super(tag + " must be empty tag", parser);
         }

java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java

@@ -27,10 +27,10 @@ import java.util.ArrayList;
 import java.util.Map;
 import java.util.Stack;
 
-public class BinaryDictIOUtils {
+public final class BinaryDictIOUtils {
     private static final boolean DBG = false;
 
-    private static class Position {
+    private static final class Position {
         public static final int NOT_READ_GROUPCOUNT = -1;
 
         public int mAddress;

java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java

@@ -43,7 +43,7 @@ import java.util.TreeMap;
  *
  * All the methods in this class are static.
  */
-public class BinaryDictInputOutput {
+public final class BinaryDictInputOutput {
 
     private static final boolean DBG = MakedictLog.DBG;
 
@@ -124,7 +124,7 @@ public class BinaryDictInputOutput {
     /**
      * A class grouping utility function for our specific character encoding.
      */
-    private static class CharEncoding {
+    private static final class CharEncoding {
 
         private static final int MINIMAL_ONE_BYTE_CHARACTER_VALUE = 0x20;
         private static final int MAXIMAL_ONE_BYTE_CHARACTER_VALUE = 0xFF;

java/src/com/android/inputmethod/latin/makedict/CharGroupInfo.java

@@ -23,7 +23,7 @@ import java.util.ArrayList;
 /**
  * Raw char group info straight out of a file. This will contain numbers for addresses.
  */
-public class CharGroupInfo {
+public final class CharGroupInfo {
 
     public final int mOriginalAddress;
     public final int mEndAddress;

java/src/com/android/inputmethod/latin/makedict/FormatSpec.java

@@ -221,7 +221,7 @@ public final class FormatSpec {
     /**
      * Options about file format.
      */
-    public static class FormatOptions {
+    public static final class FormatOptions {
         public final int mVersion;
         public final boolean mSupportsDynamicUpdate;
         public FormatOptions(final int version) {

java/src/com/android/inputmethod/latin/makedict/FusionDictionary.java

@@ -28,8 +28,7 @@ import java.util.LinkedList;
 /**
  * A dictionary that can fusion heads and tails of words for more compression.
  */
-public class FusionDictionary implements Iterable<Word> {
+public final class FusionDictionary implements Iterable<Word> {
-
     private static final boolean DBG = MakedictLog.DBG;
 
     /**
@@ -40,7 +39,7 @@ public class FusionDictionary implements Iterable<Word> {
      * This class also contains fields to cache size and address, to help with binary
      * generation.
      */
-    public static class Node {
+    public static final class Node {
         ArrayList<CharGroup> mData;
         // To help with binary generation
         int mCachedSize = Integer.MIN_VALUE;
@@ -60,7 +59,7 @@ public class FusionDictionary implements Iterable<Word> {
      *
      * This represents an "attribute", that is either a bigram or a shortcut.
      */
-    public static class WeightedString {
+    public static final class WeightedString {
         public final String mWord;
         public int mFrequency;
         public WeightedString(String word, int frequency) {
@@ -94,7 +93,7 @@ public class FusionDictionary implements Iterable<Word> {
      * value is the frequency of this terminal. A terminal may have non-null shortcuts and/or
      * bigrams, but a non-terminal may not. Moreover, children, if present, are null.
      */
-    public static class CharGroup {
+    public static final class CharGroup {
         public static final int NOT_A_TERMINAL = -1;
         final int mChars[];
         ArrayList<WeightedString> mShortcutTargets;
@@ -253,7 +252,7 @@ public class FusionDictionary implements Iterable<Word> {
      *
      * There are no options at the moment, so this class is empty.
      */
-    public static class DictionaryOptions {
+    public static final class DictionaryOptions {
         public final boolean mGermanUmlautProcessing;
         public final boolean mFrenchLigatureProcessing;
         public final HashMap<String, String> mAttributes;
@@ -511,7 +510,7 @@ public class FusionDictionary implements Iterable<Word> {
      * is ignored.
      * This comparator imposes orderings that are inconsistent with equals.
      */
-    static private class CharGroupComparator implements java.util.Comparator<CharGroup> {
+    static private final class CharGroupComparator implements java.util.Comparator<CharGroup> {
         @Override
         public int compare(CharGroup c1, CharGroup c2) {
             if (c1.mChars[0] == c2.mChars[0]) return 0;
@@ -746,9 +745,8 @@ public class FusionDictionary implements Iterable<Word> {
      *
      * This is purely for convenience.
      */
-    public static class DictionaryIterator implements Iterator<Word> {
+    public static final class DictionaryIterator implements Iterator<Word> {
-
+        private static final class Position {
-        private static class Position {
             public Iterator<CharGroup> pos;
             public int length;
             public Position(ArrayList<CharGroup> groups) {

java/src/com/android/inputmethod/latin/makedict/MakedictLog.java

@@ -21,7 +21,7 @@ import android.util.Log;
 /**
  * Wrapper to redirect log events to the right output medium.
  */
-public class MakedictLog {
+public final class MakedictLog {
     public static final boolean DBG = false;
     private static final String TAG = MakedictLog.class.getSimpleName();
 

java/src/com/android/inputmethod/latin/makedict/PendingAttribute.java

@@ -22,7 +22,7 @@ package com.android.inputmethod.latin.makedict;
  * An attribute is either a bigram or a shortcut.
  * All instances of this class are always immutable.
  */
-public class PendingAttribute {
+public final class PendingAttribute {
     public final int mFrequency;
     public final int mAddress;
     public PendingAttribute(final int frequency, final int address) {

java/src/com/android/inputmethod/latin/makedict/UnsupportedFormatException.java

@@ -19,7 +19,7 @@ package com.android.inputmethod.latin.makedict;
 /**
  * Simple exception thrown when a file format is not recognized.
  */
-public class UnsupportedFormatException extends Exception {
+public final class UnsupportedFormatException extends Exception {
     public UnsupportedFormatException(String description) {
         super(description);
     }

java/src/com/android/inputmethod/latin/makedict/Word.java

@@ -26,7 +26,7 @@ import java.util.Arrays;
  *
  * This is chiefly used to iterate a dictionary.
  */
-public class Word implements Comparable<Word> {
+public final class Word implements Comparable<Word> {
     public final String mWord;
     public final int mFrequency;
     public final ArrayList<WeightedString> mShortcutTargets;

java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerService.java

@@ -50,7 +50,7 @@ import java.util.TreeMap;
 /**
  * Service for spell checking, using LatinIME's dictionaries and mechanisms.
  */
-public class AndroidSpellCheckerService extends SpellCheckerService
+public final class AndroidSpellCheckerService extends SpellCheckerService
         implements SharedPreferences.OnSharedPreferenceChangeListener {
     private static final String TAG = AndroidSpellCheckerService.class.getSimpleName();
     private static final boolean DBG = false;
@@ -201,8 +201,8 @@ public class AndroidSpellCheckerService extends SpellCheckerService
     }
 
     // TODO: remove this class and replace it by storage local to the session.
-    public static class SuggestionsGatherer {
+    public static final class SuggestionsGatherer {
-        public static class Result {
+        public static final class Result {
             public final String[] mSuggestions;
             public final boolean mHasRecommendedSuggestions;
             public Result(final String[] gatheredSuggestions,

java/src/com/android/inputmethod/latin/spellcheck/AndroidSpellCheckerSession.java

@@ -26,7 +26,7 @@ import com.android.inputmethod.latin.CollectionUtils;
 
 import java.util.ArrayList;
 
-public class AndroidSpellCheckerSession extends AndroidWordLevelSpellCheckerSession {
+public final class AndroidSpellCheckerSession extends AndroidWordLevelSpellCheckerSession {
     private static final String TAG = AndroidSpellCheckerSession.class.getSimpleName();
     private static final boolean DBG = false;
     private final static String[] EMPTY_STRING_ARRAY = new String[0];

java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java

@@ -50,7 +50,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
     protected final SuggestionsCache mSuggestionsCache = new SuggestionsCache();
     private final ContentObserver mObserver;
 
-    private static class SuggestionsParams {
+    private static final class SuggestionsParams {
         public final String[] mSuggestions;
         public final int mFlags;
         public SuggestionsParams(String[] suggestions, int flags) {
@@ -59,7 +59,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
         }
     }
 
-    protected static class SuggestionsCache {
+    protected static final class SuggestionsCache {
         private static final char CHAR_DELIMITER = '\uFFFC';
         private static final int MAX_CACHE_SIZE = 50;
         private final LruCache<String, SuggestionsParams> mUnigramSuggestionsInfoCache =

java/src/com/android/inputmethod/latin/spellcheck/DictAndProximity.java

@@ -22,7 +22,7 @@ import com.android.inputmethod.keyboard.ProximityInfo;
 /**
  * A simple container for both a Dictionary and a ProximityInfo.
  */
-public class DictAndProximity {
+public final class DictAndProximity {
     public final Dictionary mDictionary;
     public final ProximityInfo mProximityInfo;
     public DictAndProximity(final Dictionary dictionary, final ProximityInfo proximityInfo) {

java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java

@@ -36,7 +36,7 @@ import java.util.concurrent.TimeUnit;
  * the client code, but may help with sloppy clients.
  */
 @SuppressWarnings("serial")
-public class DictionaryPool extends LinkedBlockingQueue<DictAndProximity> {
+public final class DictionaryPool extends LinkedBlockingQueue<DictAndProximity> {
     private final static String TAG = DictionaryPool.class.getSimpleName();
     // How many seconds we wait for a dictionary to become available. Past this delay, we give up in
     // fear some bug caused a deadlock, and reset the whole pool.

java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerProximityInfo.java

@@ -22,7 +22,7 @@ import com.android.inputmethod.latin.Constants;
 
 import java.util.TreeMap;
 
-public class SpellCheckerProximityInfo {
+public final class SpellCheckerProximityInfo {
     /* public for test */
     final public static int NUL = Constants.NOT_A_CODE;
 
@@ -53,7 +53,7 @@ public class SpellCheckerProximityInfo {
         return result;
     }
 
-    private static class Latin {
+    private static final class Latin {
         // This is a map from the code point to the index in the PROXIMITY array.
         // At the time the native code to read the binary dictionary needs the proximity info be
         // passed as a flat array spaced by MAX_PROXIMITY_CHARS_SIZE columns, one for each input
@@ -122,7 +122,7 @@ public class SpellCheckerProximityInfo {
         }
     }
 
-    private static class Cyrillic {
+    private static final class Cyrillic {
         final private static TreeMap<Integer, Integer> INDICES = CollectionUtils.newTreeMap();
         // TODO: The following table is solely based on the keyboard layout. Consult with Russian
         // speakers on commonly misspelled words/letters.

java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerSettingsActivity.java

@@ -23,7 +23,7 @@ import android.preference.PreferenceActivity;
 /**
  * Spell checker preference screen.
  */
-public class SpellCheckerSettingsActivity extends PreferenceActivity {
+public final class SpellCheckerSettingsActivity extends PreferenceActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerSettingsFragment.java

@@ -24,7 +24,7 @@ import com.android.inputmethod.latin.R;
 /**
  * Preference screen.
  */
-public class SpellCheckerSettingsFragment extends PreferenceFragment {
+public final class SpellCheckerSettingsFragment extends PreferenceFragment {
     /**
      * Empty constructor for fragment generation.
      */

java/src/com/android/inputmethod/latin/suggestions/MoreSuggestions.java

@@ -30,14 +30,14 @@ import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.SuggestedWords;
 import com.android.inputmethod.latin.Utils;
 
-public class MoreSuggestions extends Keyboard {
+public final class MoreSuggestions extends Keyboard {
     public static final int SUGGESTION_CODE_BASE = 1024;
 
     MoreSuggestions(final MoreSuggestionsParam params) {
         super(params);
     }
 
-    private static class MoreSuggestionsParam extends KeyboardParams {
+    private static final class MoreSuggestionsParam extends KeyboardParams {
         private final int[] mWidths = new int[SuggestionStripView.MAX_SUGGESTIONS];
         private final int[] mRowNumbers = new int[SuggestionStripView.MAX_SUGGESTIONS];
         private final int[] mColumnOrders = new int[SuggestionStripView.MAX_SUGGESTIONS];
@@ -163,7 +163,7 @@ public class MoreSuggestions extends Keyboard {
         }
     }
 
-    public static class Builder extends KeyboardBuilder<MoreSuggestionsParam> {
+    public static final class Builder extends KeyboardBuilder<MoreSuggestionsParam> {
         private final MoreSuggestionsView mPaneView;
         private SuggestedWords mSuggestions;
         private int mFromPos;
@@ -216,7 +216,7 @@ public class MoreSuggestions extends Keyboard {
         }
     }
 
-    private static class Divider extends Key.Spacer {
+    private static final class Divider extends Key.Spacer {
         private final Drawable mIcon;
 
         public Divider(final KeyboardParams params, final Drawable icon, final int x,

java/src/com/android/inputmethod/latin/suggestions/MoreSuggestionsView.java

@@ -40,7 +40,7 @@ import com.android.inputmethod.latin.R;
  * A view that renders a virtual {@link MoreSuggestions}. It handles rendering of keys and detecting
  * key presses and touch movements.
  */
-public class MoreSuggestionsView extends KeyboardView implements MoreKeysPanel {
+public final class MoreSuggestionsView extends KeyboardView implements MoreKeysPanel {
     private final int[] mCoordinates = new int[2];
 
     final KeyDetector mModalPanelKeyDetector;

java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java

@@ -70,7 +70,7 @@ import com.android.inputmethod.research.ResearchLogger;
 
 import java.util.ArrayList;
 
-public class SuggestionStripView extends RelativeLayout implements OnClickListener,
+public final class SuggestionStripView extends RelativeLayout implements OnClickListener,
         OnLongClickListener {
     public interface Listener {
         public boolean addWordToUserDictionary(String word);
@@ -105,7 +105,7 @@ public class SuggestionStripView extends RelativeLayout implements OnClickListen
 
     private final UiHandler mHandler = new UiHandler(this);
 
-    private static class UiHandler extends StaticInnerHandlerWrapper<SuggestionStripView> {
+    private static final class UiHandler extends StaticInnerHandlerWrapper<SuggestionStripView> {
         private static final int MSG_HIDE_PREVIEW = 0;
 
         public UiHandler(SuggestionStripView outerInstance) {
@@ -131,7 +131,7 @@ public class SuggestionStripView extends RelativeLayout implements OnClickListen
         }
     }
 
-    private static class SuggestionStripViewParams {
+    private static final class SuggestionStripViewParams {
         private static final int DEFAULT_SUGGESTIONS_COUNT_IN_STRIP = 3;
         private static final float DEFAULT_CENTER_SUGGESTION_PERCENTILE = 0.40f;
         private static final int DEFAULT_MAX_MORE_SUGGESTIONS_ROW = 2;