diff --git a/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java b/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java
index 70e38fd..039c77b 100644
--- a/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java
+++ b/java/src/com/android/inputmethod/accessibility/AccessibilityEntityProvider.java
@@ -35,6 +35,7 @@
 import com.android.inputmethod.keyboard.Key;
 import com.android.inputmethod.keyboard.Keyboard;
 import com.android.inputmethod.keyboard.KeyboardView;
+import com.android.inputmethod.latin.CollectionUtils;
 
 /**
  * Exposes a virtual view sub-tree for {@link KeyboardView} and generates
@@ -55,7 +56,7 @@
     private final AccessibilityUtils mAccessibilityUtils;
 
     /** A map of integer IDs to {@link Key}s. */
-    private final SparseArray<Key> mVirtualViewIdToKey = new SparseArray<Key>();
+    private final SparseArray<Key> mVirtualViewIdToKey = CollectionUtils.newSparseArray();
 
     /** Temporary rect used to calculate in-screen bounds. */
     private final Rect mTempBoundsInScreen = new Rect();
diff --git a/java/src/com/android/inputmethod/keyboard/Keyboard.java b/java/src/com/android/inputmethod/keyboard/Keyboard.java
index a5429e9..e37868b 100644
--- a/java/src/com/android/inputmethod/keyboard/Keyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/Keyboard.java
@@ -135,7 +135,7 @@
     public final Key[] mAltCodeKeysWhileTyping;
     public final KeyboardIconsSet mIconsSet;
 
-    private final SparseArray<Key> mKeyCache = new SparseArray<Key>();
+    private final SparseArray<Key> mKeyCache = CollectionUtils.newSparseArray();
 
     private final ProximityInfo mProximityInfo;
     private final boolean mProximityCharsCorrectionEnabled;
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardLayoutSet.java b/java/src/com/android/inputmethod/keyboard/KeyboardLayoutSet.java
index 0cb8d86..76ac3de 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardLayoutSet.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardLayoutSet.java
@@ -117,7 +117,7 @@
         int mWidth;
         // Sparse array of KeyboardLayoutSet element parameters indexed by element's id.
         final SparseArray<ElementParams> mKeyboardLayoutSetElementIdToParamsMap =
-                new SparseArray<ElementParams>();
+                CollectionUtils.newSparseArray();
 
         static class ElementParams {
             int mKeyboardXmlId;
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index 0232fae..fd789f0 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -21,7 +21,6 @@
 import android.content.res.Resources;
 import android.util.Log;
 import android.view.ContextThemeWrapper;
-import android.view.InflateException;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
@@ -38,7 +37,6 @@
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.SettingsValues;
 import com.android.inputmethod.latin.SubtypeSwitcher;
-import com.android.inputmethod.latin.Utils;
 import com.android.inputmethod.latin.WordComposer;
 
 public class KeyboardSwitcher implements KeyboardState.SwitchActions {
@@ -47,24 +45,24 @@
     public static final String PREF_KEYBOARD_LAYOUT = "pref_keyboard_layout_20110916";
 
     static class KeyboardTheme {
-        public final String mName;
         public final int mThemeId;
         public final int mStyleId;
 
-        public KeyboardTheme(String name, int themeId, int styleId) {
-            mName = name;
+        // Note: The themeId should be aligned with "themeId" attribute of Keyboard style
+        // in values/style.xml.
+        public KeyboardTheme(int themeId, int styleId) {
             mThemeId = themeId;
             mStyleId = styleId;
         }
     }
 
     private static final KeyboardTheme[] KEYBOARD_THEMES = {
-        new KeyboardTheme("Basic",            0, R.style.KeyboardTheme),
-        new KeyboardTheme("HighContrast",     1, R.style.KeyboardTheme_HighContrast),
-        new KeyboardTheme("Stone",            6, R.style.KeyboardTheme_Stone),
-        new KeyboardTheme("Stone.Bold",       7, R.style.KeyboardTheme_Stone_Bold),
-        new KeyboardTheme("GingerBread",      8, R.style.KeyboardTheme_Gingerbread),
-        new KeyboardTheme("IceCreamSandwich", 5, R.style.KeyboardTheme_IceCreamSandwich),
+        new KeyboardTheme(0, R.style.KeyboardTheme),
+        new KeyboardTheme(1, R.style.KeyboardTheme_HighContrast),
+        new KeyboardTheme(6, R.style.KeyboardTheme_Stone),
+        new KeyboardTheme(7, R.style.KeyboardTheme_Stone_Bold),
+        new KeyboardTheme(8, R.style.KeyboardTheme_Gingerbread),
+        new KeyboardTheme(5, R.style.KeyboardTheme_IceCreamSandwich),
     };
 
     private SubtypeSwitcher mSubtypeSwitcher;
@@ -355,22 +353,9 @@
             mKeyboardView.closing();
         }
 
-        Utils.GCUtils.getInstance().reset();
-        boolean tryGC = true;
-        for (int i = 0; i < Utils.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
-            try {
-                setContextThemeWrapper(mLatinIME, mKeyboardTheme);
-                mCurrentInputView = (InputView)LayoutInflater.from(mThemeContext).inflate(
-                        R.layout.input_view, null);
-                tryGC = false;
-            } catch (OutOfMemoryError e) {
-                Log.w(TAG, "load keyboard failed: " + e);
-                tryGC = Utils.GCUtils.getInstance().tryGCOrWait(mKeyboardTheme.mName, e);
-            } catch (InflateException e) {
-                Log.w(TAG, "load keyboard failed: " + e);
-                tryGC = Utils.GCUtils.getInstance().tryGCOrWait(mKeyboardTheme.mName, e);
-            }
-        }
+        setContextThemeWrapper(mLatinIME, mKeyboardTheme);
+        mCurrentInputView = (InputView)LayoutInflater.from(mThemeContext).inflate(
+                R.layout.input_view, null);
 
         mKeyboardView = (MainKeyboardView) mCurrentInputView.findViewById(R.id.keyboard_view);
         if (isHardwareAcceleratedDrawingEnabled) {
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index c8f30e2..0a70605 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -107,6 +107,7 @@
 
     // Key preview
     private final int mKeyPreviewLayoutId;
+    private final SparseArray<TextView> mKeyPreviewTexts = CollectionUtils.newSparseArray();
     protected final KeyPreviewDrawParams mKeyPreviewDrawParams;
     private boolean mShowKeyPreviewPopup = true;
     private int mDelayAfterPreview;
@@ -130,9 +131,9 @@
     private final Paint mPaint = new Paint();
     private final Paint.FontMetrics mFontMetrics = new Paint.FontMetrics();
     // This sparse array caches key label text height in pixel indexed by key label text size.
-    private static final SparseArray<Float> sTextHeightCache = new SparseArray<Float>();
+    private static final SparseArray<Float> sTextHeightCache = CollectionUtils.newSparseArray();
     // This sparse array caches key label text width in pixel indexed by key label text size.
-    private static final SparseArray<Float> sTextWidthCache = new SparseArray<Float>();
+    private static final SparseArray<Float> sTextWidthCache = CollectionUtils.newSparseArray();
     private static final char[] KEY_LABEL_REFERENCE_CHAR = { 'M' };
     private static final char[] KEY_NUMERIC_HINT_LABEL_REFERENCE_CHAR = { '8' };
 
@@ -152,7 +153,10 @@
             final PointerTracker tracker = (PointerTracker) msg.obj;
             switch (msg.what) {
             case MSG_DISMISS_KEY_PREVIEW:
-                tracker.getKeyPreviewText().setVisibility(View.INVISIBLE);
+                final TextView previewText = keyboardView.mKeyPreviewTexts.get(tracker.mPointerId);
+                if (previewText != null) {
+                    previewText.setVisibility(INVISIBLE);
+                }
                 break;
             }
         }
@@ -165,7 +169,7 @@
             removeMessages(MSG_DISMISS_KEY_PREVIEW, tracker);
         }
 
-        public void cancelAllDismissKeyPreviews() {
+        private void cancelAllDismissKeyPreviews() {
             removeMessages(MSG_DISMISS_KEY_PREVIEW);
         }
 
@@ -907,15 +911,30 @@
         }
     }
 
-    // Called by {@link PointerTracker} constructor to create a TextView.
-    @Override
-    public TextView inflateKeyPreviewText() {
+    private TextView getKeyPreviewText(final int pointerId) {
+        TextView previewText = mKeyPreviewTexts.get(pointerId);
+        if (previewText != null) {
+            return previewText;
+        }
         final Context context = getContext();
         if (mKeyPreviewLayoutId != 0) {
-            return (TextView)LayoutInflater.from(context).inflate(mKeyPreviewLayoutId, null);
+            previewText = (TextView)LayoutInflater.from(context).inflate(mKeyPreviewLayoutId, null);
         } else {
-            return new TextView(context);
+            previewText = new TextView(context);
         }
+        mKeyPreviewTexts.put(pointerId, previewText);
+        return previewText;
+    }
+
+    private void dismissAllKeyPreviews() {
+        final int pointerCount = mKeyPreviewTexts.size();
+        for (int id = 0; id < pointerCount; id++) {
+            final TextView previewText = mKeyPreviewTexts.get(id);
+            if (previewText != null) {
+                previewText.setVisibility(INVISIBLE);
+            }
+        }
+        PointerTracker.setReleasedKeyGraphicsToAllKeys();
     }
 
     @Override
@@ -971,7 +990,7 @@
     public void showKeyPreview(PointerTracker tracker) {
         if (!mShowKeyPreviewPopup) return;
 
-        final TextView previewText = tracker.getKeyPreviewText();
+        final TextView previewText = getKeyPreviewText(tracker.mPointerId);
         // If the key preview has no parent view yet, add it to the ViewGroup which can place
         // key preview absolutely in SoftInputWindow.
         if (previewText.getParent() == null) {
@@ -1082,7 +1101,7 @@
     }
 
     public void closing() {
-        PointerTracker.dismissAllKeyPreviews();
+        dismissAllKeyPreviews();
         cancelAllMessages();
 
         mInvalidateAllKeys = true;
diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index 9d95320..d9a7cb4 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -21,8 +21,6 @@
 import android.os.SystemClock;
 import android.util.Log;
 import android.view.MotionEvent;
-import android.view.View;
-import android.widget.TextView;
 
 import com.android.inputmethod.accessibility.AccessibilityUtils;
 import com.android.inputmethod.keyboard.internal.GestureStroke;
@@ -79,7 +77,6 @@
 
     public interface DrawingProxy extends MoreKeysPanel.Controller {
         public void invalidateKey(Key key);
-        public TextView inflateKeyPreviewText();
         public void showKeyPreview(PointerTracker tracker);
         public void dismissKeyPreview(PointerTracker tracker);
         public void showGestureTrail(PointerTracker tracker);
@@ -140,7 +137,6 @@
 
     private Keyboard mKeyboard;
     private int mKeyQuarterWidthSquared;
-    private final TextView mKeyPreviewText;
 
     private boolean mIsAlphabetKeyboard;
     private boolean mIsPossibleGesture = false;
@@ -261,11 +257,10 @@
         updateGestureHandlingMode();
     }
 
-    public static void dismissAllKeyPreviews() {
+    public static void setReleasedKeyGraphicsToAllKeys() {
         final int trackersSize = sTrackers.size();
         for (int i = 0; i < trackersSize; ++i) {
             final PointerTracker tracker = sTrackers.get(i);
-            tracker.getKeyPreviewText().setVisibility(View.INVISIBLE);
             tracker.setReleasedKeyGraphics(tracker.mCurrentKey);
         }
     }
@@ -312,11 +307,6 @@
         mListener = handler.getKeyboardActionListener();
         mDrawingProxy = handler.getDrawingProxy();
         mTimerProxy = handler.getTimerProxy();
-        mKeyPreviewText = mDrawingProxy.inflateKeyPreviewText();
-    }
-
-    public TextView getKeyPreviewText() {
-        return mKeyPreviewText;
     }
 
     // Returns true if keyboard has been changed by this callback.
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyStyles.java b/java/src/com/android/inputmethod/keyboard/internal/KeyStyles.java
index 16fd715..e40cf45 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyStyles.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyStyles.java
@@ -91,7 +91,7 @@
 
     private class DeclaredKeyStyle extends KeyStyle {
         private final String mParentStyleName;
-        private final SparseArray<Object> mStyleAttributes = new SparseArray<Object>();
+        private final SparseArray<Object> mStyleAttributes = CollectionUtils.newSparseArray();
 
         public DeclaredKeyStyle(String parentStyleName) {
             mParentStyleName = parentStyleName;
diff --git a/java/src/com/android/inputmethod/keyboard/internal/PreviewPlacerView.java b/java/src/com/android/inputmethod/keyboard/internal/PreviewPlacerView.java
index 59a92d6..3f33aee 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/PreviewPlacerView.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/PreviewPlacerView.java
@@ -28,6 +28,7 @@
 import android.widget.RelativeLayout;
 
 import com.android.inputmethod.keyboard.PointerTracker;
+import com.android.inputmethod.latin.CollectionUtils;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.StaticInnerHandlerWrapper;
 
@@ -47,7 +48,7 @@
     private int mXOrigin;
     private int mYOrigin;
 
-    private final SparseArray<PointerTracker> mPointers = new SparseArray<PointerTracker>();
+    private final SparseArray<PointerTracker> mPointers = CollectionUtils.newSparseArray();
 
     private String mGestureFloatingPreviewText;
     private int mLastPointerX;
diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index c04a99b..8909526 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -63,7 +63,7 @@
     private final boolean mUseFullEditDistance;
 
     private final SparseArray<DicTraverseSession> mDicTraverseSessions =
-            new SparseArray<DicTraverseSession>();
+            CollectionUtils.newSparseArray();
 
     // TODO: There should be a way to remove used DicTraverseSession objects from
     // {@code mDicTraverseSessions}.
diff --git a/java/src/com/android/inputmethod/latin/CollectionUtils.java b/java/src/com/android/inputmethod/latin/CollectionUtils.java
index 789b79a..baa2ee1 100644
--- a/java/src/com/android/inputmethod/latin/CollectionUtils.java
+++ b/java/src/com/android/inputmethod/latin/CollectionUtils.java
@@ -16,6 +16,8 @@
 
 package com.android.inputmethod.latin;
 
+import android.util.SparseArray;
+
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -86,4 +88,8 @@
     public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList(final E[] array) {
         return new CopyOnWriteArrayList<E>(array);
     }
+
+    public static <E> SparseArray<E> newSparseArray() {
+        return new SparseArray<E>();
+    }
 }
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 0729d0f..df200cd 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -381,18 +381,7 @@
 
         ImfUtils.setAdditionalInputMethodSubtypes(this, mCurrentSettings.getAdditionalSubtypes());
 
-        Utils.GCUtils.getInstance().reset();
-        boolean tryGC = true;
-        // Shouldn't this be removed? I think that from Honeycomb on, the GC is now actually working
-        // as expected and this code is useless.
-        for (int i = 0; i < Utils.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
-            try {
-                initSuggest();
-                tryGC = false;
-            } catch (OutOfMemoryError e) {
-                tryGC = Utils.GCUtils.getInstance().tryGCOrWait("InitSuggest", e);
-            }
-        }
+        initSuggest();
 
         mDisplayOrientation = res.getConfiguration().orientation;
 
@@ -416,7 +405,8 @@
     }
 
     // Has to be package-visible for unit tests
-    /* package */ void loadSettings() {
+    /* package for test */
+    void loadSettings() {
         // Note that the calling sequence of onCreate() and onCurrentInputMethodSubtypeChanged()
         // is not guaranteed. It may even be called at the same time on a different thread.
         if (null == mPrefs) mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
@@ -540,7 +530,10 @@
 
     @Override
     public void onConfigurationChanged(Configuration conf) {
-        mSubtypeSwitcher.onConfigurationChanged(conf);
+        // System locale has been changed. Needs to reload keyboard.
+        if (mSubtypeSwitcher.onConfigurationChanged(conf, this)) {
+            loadKeyboard();
+        }
         // If orientation changed while predicting, commit the change
         if (mDisplayOrientation != conf.orientation) {
             mDisplayOrientation = conf.orientation;
@@ -607,6 +600,7 @@
         // Note that the calling sequence of onCreate() and onCurrentInputMethodSubtypeChanged()
         // is not guaranteed. It may even be called at the same time on a different thread.
         mSubtypeSwitcher.updateSubtype(subtype);
+        loadKeyboard();
     }
 
     private void onStartInputInternal(EditorInfo editorInfo, boolean restarting) {
@@ -675,7 +669,15 @@
         final boolean inputTypeChanged = !mCurrentSettings.isSameInputType(editorInfo);
         final boolean isDifferentTextField = !restarting || inputTypeChanged;
         if (isDifferentTextField) {
-            mSubtypeSwitcher.updateParametersOnStartInputView();
+            final boolean currentSubtypeEnabled = mSubtypeSwitcher
+                    .updateParametersOnStartInputViewAndReturnIfCurrentSubtypeEnabled();
+            if (!currentSubtypeEnabled) {
+                // Current subtype is disabled. Needs to update subtype and keyboard.
+                final InputMethodSubtype newSubtype = ImfUtils.getCurrentInputMethodSubtype(
+                        this, mSubtypeSwitcher.getNoLanguageSubtype());
+                mSubtypeSwitcher.updateSubtype(newSubtype);
+                loadKeyboard();
+            }
         }
 
         // The EditorInfo might have a flag that affects fullscreen mode.
@@ -1291,7 +1293,7 @@
             onSettingsKeyPressed();
             break;
         case Keyboard.CODE_SHORTCUT:
-            mSubtypeSwitcher.switchToShortcutIME();
+            mSubtypeSwitcher.switchToShortcutIME(this);
             break;
         case Keyboard.CODE_ACTION_ENTER:
             performEditorAction(getActionId(switcher.getKeyboard()));
@@ -1698,7 +1700,8 @@
 
     // TODO: make this private
     // Outside LatinIME, only used by the test suite.
-    /* package for tests */ boolean isShowingPunctuationList() {
+    /* package for tests */
+    boolean isShowingPunctuationList() {
         if (mSuggestionStripView == null) return false;
         return mCurrentSettings.mSuggestPuncList == mSuggestionStripView.getSuggestions();
     }
@@ -2066,9 +2069,10 @@
         return mCurrentSettings.isWordSeparator(code);
     }
 
-    // Notify that language or mode have been changed and toggleLanguage will update KeyboardID
-    // according to new language or mode. Called from SubtypeSwitcher.
-    public void onRefreshKeyboard() {
+    // TODO: Make this private
+    // Outside LatinIME, only used by the {@link InputTestsBase} test suite.
+    /* package for test */
+    void loadKeyboard() {
         // When the device locale is changed in SetupWizard etc., this method may get called via
         // onConfigurationChanged before SoftInputWindow is shown.
         initSuggest();
diff --git a/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java b/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
index a7a5fcb..c693edc 100644
--- a/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
+++ b/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
@@ -22,6 +22,7 @@
 import android.content.Intent;
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.inputmethodservice.InputMethodService;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
 import android.os.AsyncTask;
@@ -42,7 +43,6 @@
     private static final String TAG = SubtypeSwitcher.class.getSimpleName();
 
     private static final SubtypeSwitcher sInstance = new SubtypeSwitcher();
-    private /* final */ LatinIME mService;
     private /* final */ InputMethodManager mImm;
     private /* final */ Resources mResources;
     private /* final */ ConnectivityManager mConnectivityManager;
@@ -68,11 +68,11 @@
             return mEnabledSubtypeCount >= 2 || !mIsSystemLanguageSameAsInputLanguage;
         }
 
-        public void updateEnabledSubtypeCount(int count) {
+        public void updateEnabledSubtypeCount(final int count) {
             mEnabledSubtypeCount = count;
         }
 
-        public void updateIsSystemLanguageSameAsInputLanguage(boolean isSame) {
+        public void updateIsSystemLanguageSameAsInputLanguage(final boolean isSame) {
             mIsSystemLanguageSameAsInputLanguage = isSame;
         }
     }
@@ -81,18 +81,17 @@
         return sInstance;
     }
 
-    public static void init(LatinIME service) {
-        SubtypeLocale.init(service);
-        sInstance.initialize(service);
-        sInstance.updateAllParameters();
+    public static void init(final Context context) {
+        SubtypeLocale.init(context);
+        sInstance.initialize(context);
+        sInstance.updateAllParameters(context);
     }
 
     private SubtypeSwitcher() {
         // Intentional empty constructor for singleton.
     }
 
-    private void initialize(LatinIME service) {
-        mService = service;
+    private void initialize(final Context service) {
         mResources = service.getResources();
         mImm = ImfUtils.getInputMethodManager(service);
         mConnectivityManager = (ConnectivityManager) service.getSystemService(
@@ -111,39 +110,46 @@
 
     // Update all parameters stored in SubtypeSwitcher.
     // Only configuration changed event is allowed to call this because this is heavy.
-    private void updateAllParameters() {
+    private void updateAllParameters(final Context context) {
         mCurrentSystemLocale = mResources.getConfiguration().locale;
-        updateSubtype(ImfUtils.getCurrentInputMethodSubtype(mService, mNoLanguageSubtype));
-        updateParametersOnStartInputView();
+        updateSubtype(ImfUtils.getCurrentInputMethodSubtype(context, mNoLanguageSubtype));
+        updateParametersOnStartInputViewAndReturnIfCurrentSubtypeEnabled();
     }
 
-    // Update parameters which are changed outside LatinIME. This parameters affect UI so they
-    // should be updated every time onStartInputview.
-    public void updateParametersOnStartInputView() {
-        updateEnabledSubtypes();
+    /**
+     * Update parameters which are changed outside LatinIME. This parameters affect UI so they
+     * should be updated every time onStartInputView.
+     *
+     * @return true if the current subtype is enabled.
+     */
+    public boolean updateParametersOnStartInputViewAndReturnIfCurrentSubtypeEnabled() {
+        final boolean currentSubtypeEnabled =
+                updateEnabledSubtypesAndReturnIfEnabled(mCurrentSubtype);
         updateShortcutIME();
+        return currentSubtypeEnabled;
     }
 
-    // Reload enabledSubtypes from the framework.
-    private void updateEnabledSubtypes() {
-        final InputMethodSubtype currentSubtype = mCurrentSubtype;
-        boolean foundCurrentSubtypeBecameDisabled = true;
+    /**
+     * Update enabled subtypes from the framework.
+     *
+     * @param subtype the subtype to be checked
+     * @return true if the {@code subtype} is enabled.
+     */
+    private boolean updateEnabledSubtypesAndReturnIfEnabled(final InputMethodSubtype subtype) {
         final List<InputMethodSubtype> enabledSubtypesOfThisIme =
                 mImm.getEnabledInputMethodSubtypeList(null, true);
-        for (InputMethodSubtype ims : enabledSubtypesOfThisIme) {
-            if (ims.equals(currentSubtype)) {
-                foundCurrentSubtypeBecameDisabled = false;
-            }
-        }
         mNeedsToDisplayLanguage.updateEnabledSubtypeCount(enabledSubtypesOfThisIme.size());
-        if (foundCurrentSubtypeBecameDisabled) {
-            if (DBG) {
-                Log.w(TAG, "Last subtype: "
-                        + currentSubtype.getLocale() + "/" + currentSubtype.getExtraValue());
-                Log.w(TAG, "Last subtype was disabled. Update to the current one.");
+
+        for (final InputMethodSubtype ims : enabledSubtypesOfThisIme) {
+            if (ims.equals(subtype)) {
+                return true;
             }
-            updateSubtype(ImfUtils.getCurrentInputMethodSubtype(mService, mNoLanguageSubtype));
         }
+        if (DBG) {
+            Log.w(TAG, "Subtype: " + subtype.getLocale() + "/" + subtype.getExtraValue()
+                    + " was disabled");
+        }
+        return false;
     }
 
     private void updateShortcutIME() {
@@ -159,8 +165,8 @@
                 mImm.getShortcutInputMethodsAndSubtypes();
         mShortcutInputMethodInfo = null;
         mShortcutSubtype = null;
-        for (InputMethodInfo imi : shortcuts.keySet()) {
-            List<InputMethodSubtype> subtypes = shortcuts.get(imi);
+        for (final InputMethodInfo imi : shortcuts.keySet()) {
+            final List<InputMethodSubtype> subtypes = shortcuts.get(imi);
             // TODO: Returns the first found IMI for now. Should handle all shortcuts as
             // appropriate.
             mShortcutInputMethodInfo = imi;
@@ -194,24 +200,24 @@
 
         mCurrentSubtype = newSubtype;
         updateShortcutIME();
-        mService.onRefreshKeyboard();
     }
 
     ////////////////////////////
     // Shortcut IME functions //
     ////////////////////////////
 
-    public void switchToShortcutIME() {
+    public void switchToShortcutIME(final InputMethodService context) {
         if (mShortcutInputMethodInfo == null) {
             return;
         }
 
         final String imiId = mShortcutInputMethodInfo.getId();
-        switchToTargetIME(imiId, mShortcutSubtype);
+        switchToTargetIME(imiId, mShortcutSubtype, context);
     }
 
-    private void switchToTargetIME(final String imiId, final InputMethodSubtype subtype) {
-        final IBinder token = mService.getWindow().getWindow().getAttributes().token;
+    private void switchToTargetIME(final String imiId, final InputMethodSubtype subtype,
+            final InputMethodService context) {
+        final IBinder token = context.getWindow().getWindow().getAttributes().token;
         if (token == null) {
             return;
         }
@@ -253,7 +259,7 @@
         return true;
     }
 
-    public void onNetworkStateChanged(Intent intent) {
+    public void onNetworkStateChanged(final Intent intent) {
         final boolean noConnection = intent.getBooleanExtra(
                 ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
         mIsNetworkConnected = !noConnection;
@@ -265,7 +271,7 @@
     // Subtype Switching functions //
     //////////////////////////////////
 
-    public boolean needsToDisplayLanguage(Locale keyboardLocale) {
+    public boolean needsToDisplayLanguage(final Locale keyboardLocale) {
         if (keyboardLocale.toString().equals(SubtypeLocale.NO_LANGUAGE)) {
             return true;
         }
@@ -279,12 +285,14 @@
         return SubtypeLocale.getSubtypeLocale(mCurrentSubtype);
     }
 
-    public void onConfigurationChanged(Configuration conf) {
+    public boolean onConfigurationChanged(final Configuration conf, final Context context) {
         final Locale systemLocale = conf.locale;
+        final boolean systemLocaleChanged = !systemLocale.equals(mCurrentSystemLocale);
         // If system configuration was changed, update all parameters.
-        if (!systemLocale.equals(mCurrentSystemLocale)) {
-            updateAllParameters();
+        if (systemLocaleChanged) {
+            updateAllParameters(context);
         }
+        return systemLocaleChanged;
     }
 
     public InputMethodSubtype getCurrentSubtype() {
diff --git a/java/src/com/android/inputmethod/latin/Utils.java b/java/src/com/android/inputmethod/latin/Utils.java
index 9997569..fc7a421 100644
--- a/java/src/com/android/inputmethod/latin/Utils.java
+++ b/java/src/com/android/inputmethod/latin/Utils.java
@@ -65,44 +65,6 @@
         }
     }
 
-    public static class GCUtils {
-        private static final String GC_TAG = GCUtils.class.getSimpleName();
-        public static final int GC_TRY_COUNT = 2;
-        // GC_TRY_LOOP_MAX is used for the hard limit of GC wait,
-        // GC_TRY_LOOP_MAX should be greater than GC_TRY_COUNT.
-        public static final int GC_TRY_LOOP_MAX = 5;
-        private static final long GC_INTERVAL = DateUtils.SECOND_IN_MILLIS;
-        private static GCUtils sInstance = new GCUtils();
-        private int mGCTryCount = 0;
-
-        public static GCUtils getInstance() {
-            return sInstance;
-        }
-
-        public void reset() {
-            mGCTryCount = 0;
-        }
-
-        public boolean tryGCOrWait(String metaData, Throwable t) {
-            if (mGCTryCount == 0) {
-                System.gc();
-            }
-            if (++mGCTryCount > GC_TRY_COUNT) {
-                LatinImeLogger.logOnException(metaData, t);
-                return false;
-            } else {
-                try {
-                    Thread.sleep(GC_INTERVAL);
-                    return true;
-                } catch (InterruptedException e) {
-                    Log.e(GC_TAG, "Sleep was interrupted.");
-                    LatinImeLogger.logOnException(metaData, t);
-                    return false;
-                }
-            }
-        }
-    }
-
     /* package */ static class RingCharBuffer {
         private static RingCharBuffer sRingCharBuffer = new RingCharBuffer();
         private static final char PLACEHOLDER_DELIMITER_CHAR = '\uFFFC';
diff --git a/tests/src/com/android/inputmethod/latin/InputTestsBase.java b/tests/src/com/android/inputmethod/latin/InputTestsBase.java
index 9feec2b..ffd95f5 100644
--- a/tests/src/com/android/inputmethod/latin/InputTestsBase.java
+++ b/tests/src/com/android/inputmethod/latin/InputTestsBase.java
@@ -135,7 +135,6 @@
         mLatinIME.onCreateInputView();
         mLatinIME.onStartInputView(ei, false);
         mInputConnection = ic;
-        mKeyboard = mLatinIME.mKeyboardSwitcher.getKeyboard();
         changeLanguage("en_US");
     }
 
@@ -253,6 +252,8 @@
             fail("InputMethodSubtype for locale " + locale + " is not enabled");
         }
         SubtypeSwitcher.getInstance().updateSubtype(subtype);
+        mLatinIME.loadKeyboard();
+        mKeyboard = mLatinIME.mKeyboardSwitcher.getKeyboard();
         waitForDictionaryToBeLoaded();
     }