diff --git a/java/src/com/android/inputmethod/accessibility/AccessibilityUtils.java b/java/src/com/android/inputmethod/accessibility/AccessibilityUtils.java
index 1836f27..9caed00 100644
--- a/java/src/com/android/inputmethod/accessibility/AccessibilityUtils.java
+++ b/java/src/com/android/inputmethod/accessibility/AccessibilityUtils.java
@@ -17,7 +17,6 @@
 package com.android.inputmethod.accessibility;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.inputmethodservice.InputMethodService;
 import android.media.AudioManager;
 import android.os.SystemClock;
@@ -55,15 +54,15 @@
      */
     private static final boolean ENABLE_ACCESSIBILITY = true;
 
-    public static void init(InputMethodService inputMethod, SharedPreferences prefs) {
+    public static void init(InputMethodService inputMethod) {
         if (!ENABLE_ACCESSIBILITY)
             return;
 
         // These only need to be initialized if the kill switch is off.
-        sInstance.initInternal(inputMethod, prefs);
-        KeyCodeDescriptionMapper.init(inputMethod, prefs);
-        AccessibleInputMethodServiceProxy.init(inputMethod, prefs);
-        AccessibleKeyboardViewProxy.init(inputMethod, prefs);
+        sInstance.initInternal(inputMethod);
+        KeyCodeDescriptionMapper.init();
+        AccessibleInputMethodServiceProxy.init(inputMethod);
+        AccessibleKeyboardViewProxy.init(inputMethod);
     }
 
     public static AccessibilityUtils getInstance() {
@@ -74,7 +73,7 @@
         // This class is not publicly instantiable.
     }
 
-    private void initInternal(Context context, SharedPreferences prefs) {
+    private void initInternal(Context context) {
         mContext = context;
         mAccessibilityManager = (AccessibilityManager) context
                 .getSystemService(Context.ACCESSIBILITY_SERVICE);
diff --git a/java/src/com/android/inputmethod/accessibility/AccessibleInputMethodServiceProxy.java b/java/src/com/android/inputmethod/accessibility/AccessibleInputMethodServiceProxy.java
index 4ab9cb8..d834dd1 100644
--- a/java/src/com/android/inputmethod/accessibility/AccessibleInputMethodServiceProxy.java
+++ b/java/src/com/android/inputmethod/accessibility/AccessibleInputMethodServiceProxy.java
@@ -17,7 +17,6 @@
 package com.android.inputmethod.accessibility;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.inputmethodservice.InputMethodService;
 import android.media.AudioManager;
 import android.os.Looper;
@@ -82,8 +81,8 @@
         }
     }
 
-    public static void init(InputMethodService inputMethod, SharedPreferences prefs) {
-        sInstance.initInternal(inputMethod, prefs);
+    public static void init(InputMethodService inputMethod) {
+        sInstance.initInternal(inputMethod);
     }
 
     public static AccessibleInputMethodServiceProxy getInstance() {
@@ -94,7 +93,7 @@
         // Not publicly instantiable.
     }
 
-    private void initInternal(InputMethodService inputMethod, SharedPreferences prefs) {
+    private void initInternal(InputMethodService inputMethod) {
         mInputMethod = inputMethod;
         mVibrator = (Vibrator) inputMethod.getSystemService(Context.VIBRATOR_SERVICE);
         mAudioManager = (AudioManager) inputMethod.getSystemService(Context.AUDIO_SERVICE);
@@ -125,8 +124,6 @@
      */
     @Override
     public void onFlickGesture(int direction) {
-        final int keyEventCode;
-
         switch (direction) {
         case FlickGestureDetector.FLICK_LEFT:
             sendDownUpKeyEvents(KeyEvent.KEYCODE_DPAD_LEFT);
diff --git a/java/src/com/android/inputmethod/accessibility/AccessibleKeyboardViewProxy.java b/java/src/com/android/inputmethod/accessibility/AccessibleKeyboardViewProxy.java
index 4cb2f20..9141daa 100644
--- a/java/src/com/android/inputmethod/accessibility/AccessibleKeyboardViewProxy.java
+++ b/java/src/com/android/inputmethod/accessibility/AccessibleKeyboardViewProxy.java
@@ -17,7 +17,6 @@
 package com.android.inputmethod.accessibility;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.inputmethodservice.InputMethodService;
@@ -43,8 +42,8 @@
 
     private Key mLastHoverKey = null;
 
-    public static void init(InputMethodService inputMethod, SharedPreferences prefs) {
-        sInstance.initInternal(inputMethod, prefs);
+    public static void init(InputMethodService inputMethod) {
+        sInstance.initInternal(inputMethod);
         sInstance.mListener = AccessibleInputMethodServiceProxy.getInstance();
     }
 
@@ -60,7 +59,7 @@
         // Not publicly instantiable.
     }
 
-    private void initInternal(InputMethodService inputMethod, SharedPreferences prefs) {
+    private void initInternal(InputMethodService inputMethod) {
         final Paint paint = new Paint();
         paint.setTextAlign(Paint.Align.LEFT);
         paint.setTextSize(14.0f);
@@ -71,8 +70,7 @@
         mGestureDetector = new KeyboardFlickGestureDetector(inputMethod);
     }
 
-    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event,
-            PointerTracker tracker) {
+    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
         if (mView == null) {
             Log.e(TAG, "No keyboard view set!");
             return false;
@@ -132,9 +130,9 @@
             final Key key = tracker.getKeyOn(x, y);
 
             if (key != mLastHoverKey) {
-                fireKeyHoverEvent(tracker, mLastHoverKey, false);
+                fireKeyHoverEvent(mLastHoverKey, false);
                 mLastHoverKey = key;
-                fireKeyHoverEvent(tracker, mLastHoverKey, true);
+                fireKeyHoverEvent(mLastHoverKey, true);
             }
 
             return true;
@@ -143,7 +141,7 @@
         return false;
     }
 
-    private void fireKeyHoverEvent(PointerTracker tracker, Key key, boolean entering) {
+    private void fireKeyHoverEvent(Key key, boolean entering) {
         if (mListener == null) {
             Log.e(TAG, "No accessible keyboard action listener set!");
             return;
diff --git a/java/src/com/android/inputmethod/accessibility/FlickGestureDetector.java b/java/src/com/android/inputmethod/accessibility/FlickGestureDetector.java
index 9d99e31..db12f76 100644
--- a/java/src/com/android/inputmethod/accessibility/FlickGestureDetector.java
+++ b/java/src/com/android/inputmethod/accessibility/FlickGestureDetector.java
@@ -126,7 +126,6 @@
         }
 
         final float distanceSquare = calculateDistanceSquare(mCachedHoverEnter, event);
-        final long timeout = event.getEventTime() - mCachedHoverEnter.getEventTime();
 
         switch (event.getAction()) {
         case MotionEventCompatUtils.ACTION_HOVER_MOVE:
diff --git a/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java b/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java
index e01262c..3d5ab05 100644
--- a/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java
+++ b/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java
@@ -17,7 +17,6 @@
 package com.android.inputmethod.accessibility;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.text.TextUtils;
 
 import com.android.inputmethod.keyboard.Key;
@@ -45,8 +44,8 @@
     // Map of shift-locked key codes to spoken description resource IDs
     private final HashMap<Integer, Integer> mShiftLockedKeyCodeMap;
 
-    public static void init(Context context, SharedPreferences prefs) {
-        sInstance.initInternal(context, prefs);
+    public static void init() {
+        sInstance.initInternal();
     }
 
     public static KeyCodeDescriptionMapper getInstance() {
@@ -60,7 +59,7 @@
         mShiftLockedKeyCodeMap = new HashMap<Integer, Integer>();
     }
 
-    private void initInternal(Context context, SharedPreferences prefs) {
+    private void initInternal() {
         // Manual label substitutions for key labels with no string resource
         mKeyLabelMap.put(":-)", R.string.spoken_description_smiley);
 
diff --git a/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
index e56f2ea..7f2c6c5 100644
--- a/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
@@ -206,7 +206,7 @@
                     // Detected a double tap on shift key. If we are in the ignoring double tap
                     // mode, it means we have already turned off caps lock in
                     // {@link KeyboardSwitcher#onReleaseShift} .
-                    onDoubleTapShiftKey(tracker, mKeyTimerHandler.isIgnoringDoubleTap());
+                    onDoubleTapShiftKey(mKeyTimerHandler.isIgnoringDoubleTap());
                     return true;
                 }
                 // Otherwise these events should not be handled as double tap.
@@ -342,8 +342,7 @@
         return onLongPress(parentKey, tracker);
     }
 
-    private void onDoubleTapShiftKey(@SuppressWarnings("unused") PointerTracker tracker,
-            final boolean ignore) {
+    private void onDoubleTapShiftKey(final boolean ignore) {
         // When shift key is double tapped, the first tap is correctly processed as usual tap. And
         // the second tap is treated as this double tap event, so that we need not mark tracker
         // calling setAlreadyProcessed() nor remove the tracker from mPointerQueue.
@@ -633,9 +632,8 @@
     @Override
     public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
         if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) {
-            final PointerTracker tracker = getPointerTracker(0);
             return AccessibleKeyboardViewProxy.getInstance().dispatchPopulateAccessibilityEvent(
-                    event, tracker) || super.dispatchPopulateAccessibilityEvent(event);
+                    event) || super.dispatchPopulateAccessibilityEvent(event);
         }
 
         return super.dispatchPopulateAccessibilityEvent(event);
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 98fea1b..943361c 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -489,7 +489,7 @@
         InputMethodManagerCompatWrapper.init(this);
         SubtypeSwitcher.init(this);
         KeyboardSwitcher.init(this, prefs);
-        AccessibilityUtils.init(this, prefs);
+        AccessibilityUtils.init(this);
 
         super.onCreate();
 
@@ -758,7 +758,7 @@
 
         loadSettings();
         updateCorrectionMode();
-        updateSuggestionVisibility(mPrefs, mResources);
+        updateSuggestionVisibility(mResources);
 
         if (mSuggest != null && mSettingsValues.mAutoCorrectEnabled) {
             mSuggest.setAutoCorrectionThreshold(mSettingsValues.mAutoCorrectionThreshold);
@@ -2415,7 +2415,7 @@
                 ? Suggest.CORRECTION_FULL_BIGRAM : mCorrectionMode;
     }
 
-    private void updateSuggestionVisibility(final SharedPreferences prefs, final Resources res) {
+    private void updateSuggestionVisibility(final Resources res) {
         final String suggestionVisiblityStr = mSettingsValues.mShowSuggestionsSetting;
         for (int visibility : SUGGESTION_VISIBILITY_VALUE_ARRAY) {
             if (suggestionVisiblityStr.equals(res.getString(visibility))) {
diff --git a/java/src/com/android/inputmethod/latin/SettingsValues.java b/java/src/com/android/inputmethod/latin/SettingsValues.java
index 0ad1c15..651d90c 100644
--- a/java/src/com/android/inputmethod/latin/SettingsValues.java
+++ b/java/src/com/android/inputmethod/latin/SettingsValues.java
@@ -52,7 +52,9 @@
     private final String mVoiceMode;
     private final String mAutoCorrectionThresholdRawValue;
     public final String mShowSuggestionsSetting;
+    @SuppressWarnings("unused") // TODO: Use this
     private final boolean mUsabilityStudyMode;
+    @SuppressWarnings("unused") // TODO: Use this
     private final String mKeyPreviewPopupDismissDelayRawValue;
     public final boolean mUseContactsDict;
     // Suggestion: use bigrams to adjust scores of suggestions obtained from unigram dictionary
@@ -60,7 +62,9 @@
     // Prediction: use bigrams to predict the next word when there is no input for it yet
     public final boolean mBigramPredictionEnabled;
     public final boolean mEnableSuggestionSpanInsertion;
+    @SuppressWarnings("unused") // TODO: Use this
     private final int mVibrationDurationSettingsRawValue;
+    @SuppressWarnings("unused") // TODO: Use this
     private final float mKeypressSoundVolumeRawValue;
 
     // Deduced settings
@@ -111,12 +115,12 @@
                 res.getString(R.string.auto_correction_threshold_mode_index_modest));
         mShowSuggestionsSetting = prefs.getString(Settings.PREF_SHOW_SUGGESTIONS_SETTING,
                 res.getString(R.string.prefs_suggestion_visibility_default_value));
-        mUsabilityStudyMode = getUsabilityStudyMode(prefs, res);
+        mUsabilityStudyMode = getUsabilityStudyMode(prefs);
         mKeyPreviewPopupDismissDelayRawValue = prefs.getString(
                 Settings.PREF_KEY_PREVIEW_POPUP_DISMISS_DELAY,
                 Integer.toString(res.getInteger(R.integer.config_delay_after_preview)));
         mUseContactsDict = prefs.getBoolean(Settings.PREF_KEY_USE_CONTACTS_DICT, true);
-        mAutoCorrectEnabled = isAutoCorrectEnabled(prefs, res, mAutoCorrectionThresholdRawValue);
+        mAutoCorrectEnabled = isAutoCorrectEnabled(res, mAutoCorrectionThresholdRawValue);
         mBigramSuggestionEnabled = mAutoCorrectEnabled
                 && isBigramSuggestionEnabled(prefs, res, mAutoCorrectEnabled);
         mBigramPredictionEnabled = mBigramSuggestionEnabled
@@ -131,7 +135,7 @@
         mKeypressVibrationDuration = getCurrentVibrationDuration(prefs, res);
         mFxVolume = getCurrentKeypressSoundVolume(prefs, res);
         mKeyPreviewPopupDismissDelay = getKeyPreviewPopupDismissDelay(prefs, res);
-        mAutoCorrectionThreshold = getAutoCorrectionThreshold(prefs, res,
+        mAutoCorrectionThreshold = getAutoCorrectionThreshold(res,
                 mAutoCorrectionThresholdRawValue);
         mVoiceKeyEnabled = mVoiceMode != null && !mVoiceMode.equals(voiceModeOff);
         mVoiceKeyOnMain = mVoiceMode != null && mVoiceMode.equals(voiceModeMain);
@@ -202,8 +206,8 @@
         return mMagicSpaceSwappers.contains(String.valueOf((char)code));
     }
 
-    private static boolean isAutoCorrectEnabled(final SharedPreferences sp,
-            final Resources resources, final String currentAutoCorrectionSetting) {
+    private static boolean isAutoCorrectEnabled(final Resources resources,
+            final String currentAutoCorrectionSetting) {
         final String autoCorrectionOff = resources.getString(
                 R.string.auto_correction_threshold_mode_index_off);
         return !currentAutoCorrectionSetting.equals(autoCorrectionOff);
@@ -244,8 +248,8 @@
                 R.bool.config_default_bigram_prediction));
     }
 
-    private static double getAutoCorrectionThreshold(final SharedPreferences sp,
-            final Resources resources, final String currentAutoCorrectionSetting) {
+    private static double getAutoCorrectionThreshold(final Resources resources,
+            final String currentAutoCorrectionSetting) {
         final String[] autoCorrectionThresholdValues = resources.getStringArray(
                 R.array.auto_correction_threshold_values);
         // When autoCorrectionThreshold is greater than 1.0, it's like auto correction is off.
@@ -321,8 +325,7 @@
     }
 
     // Likewise
-    public static boolean getUsabilityStudyMode(final SharedPreferences prefs,
-            final Resources res) {
+    public static boolean getUsabilityStudyMode(final SharedPreferences prefs) {
         // TODO: use mUsabilityStudyMode instead of reading it again here
         return prefs.getBoolean(Settings.PREF_USABILITY_STUDY_MODE, true);
     }
diff --git a/java/src/com/android/inputmethod/latin/SuggestionsView.java b/java/src/com/android/inputmethod/latin/SuggestionsView.java
index 10f5ec9..883bb57 100644
--- a/java/src/com/android/inputmethod/latin/SuggestionsView.java
+++ b/java/src/com/android/inputmethod/latin/SuggestionsView.java
@@ -100,8 +100,6 @@
     private static class UiHandler extends StaticInnerHandlerWrapper<SuggestionsView> {
         private static final int MSG_HIDE_PREVIEW = 0;
 
-        private static final long DELAY_HIDE_PREVIEW = 1300;
-
         public UiHandler(SuggestionsView outerInstance) {
             super(outerInstance);
         }
@@ -116,11 +114,6 @@
             }
         }
 
-        public void postHidePreview() {
-            cancelHidePreview();
-            sendMessageDelayed(obtainMessage(MSG_HIDE_PREVIEW), DELAY_HIDE_PREVIEW);
-        }
-
         public void cancelHidePreview() {
             removeMessages(MSG_HIDE_PREVIEW);
         }
diff --git a/java/src/com/android/inputmethod/latin/UserUnigramDictionary.java b/java/src/com/android/inputmethod/latin/UserUnigramDictionary.java
index 6af20c7..a7f57ae 100644
--- a/java/src/com/android/inputmethod/latin/UserUnigramDictionary.java
+++ b/java/src/com/android/inputmethod/latin/UserUnigramDictionary.java
@@ -172,7 +172,7 @@
             // Nothing pending? Return
             if (mPendingWrites.isEmpty()) return;
             // Create a background thread to write the pending entries
-            new UpdateDbTask(getContext(), sOpenHelper, mPendingWrites, mLocale).execute();
+            new UpdateDbTask(sOpenHelper, mPendingWrites, mLocale).execute();
             // Create a new map for writing new entries into while the old one is written to db
             mPendingWrites = new HashMap<String, Integer>();
         }
@@ -227,8 +227,8 @@
         private final DatabaseHelper mDbHelper;
         private final String mLocale;
 
-        public UpdateDbTask(@SuppressWarnings("unused") Context context, DatabaseHelper openHelper,
-                HashMap<String, Integer> pendingWrites, String locale) {
+        public UpdateDbTask(DatabaseHelper openHelper, HashMap<String, Integer> pendingWrites,
+                String locale) {
             mMap = pendingWrites;
             mLocale = locale;
             mDbHelper = openHelper;