diff --git a/java/res/values/keyboard-themes.xml b/java/res/values/keyboard-themes.xml
index b0bae96..9d772c4 100644
--- a/java/res/values/keyboard-themes.xml
+++ b/java/res/values/keyboard-themes.xml
@@ -26,10 +26,10 @@
         <item>@string/keyboard_theme_holo_blue</item>
     </string-array>
     <!-- An element must be a keyboard theme id of {@link KeyboardTheme#THEME_ID_*}. -->
-    <integer-array name="keyboard_theme_ids" translatable="false">
+    <string-array name="keyboard_theme_ids" translatable="false">
         <item>3</item>
         <item>4</item>
         <item>2</item>
         <item>0</item>
-    </integer-array>
+    </string-array>
 </resources>
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index 6cd7955..d36c199 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -17,7 +17,9 @@
 package com.android.inputmethod.keyboard;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.res.Resources;
+import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.ContextThemeWrapper;
 import android.view.LayoutInflater;
@@ -45,6 +47,7 @@
     private static final String TAG = KeyboardSwitcher.class.getSimpleName();
 
     private SubtypeSwitcher mSubtypeSwitcher;
+    private SharedPreferences mPrefs;
 
     private InputView mCurrentInputView;
     private View mMainKeyboardFrame;
@@ -73,11 +76,13 @@
     }
 
     public static void init(final LatinIME latinIme) {
-        sInstance.initInternal(latinIme);
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(latinIme);
+        sInstance.initInternal(latinIme, prefs);
     }
 
-    private void initInternal(final LatinIME latinIme) {
+    private void initInternal(final LatinIME latinIme, final SharedPreferences prefs) {
         mLatinIME = latinIme;
+        mPrefs = prefs;
         mSubtypeSwitcher = SubtypeSwitcher.getInstance();
         mState = new KeyboardState(this);
         mIsHardwareAcceleratedDrawingEnabled =
@@ -86,7 +91,7 @@
 
     public void updateKeyboardTheme() {
         final boolean themeUpdated = updateKeyboardThemeAndContextThemeWrapper(
-                mLatinIME, KeyboardTheme.getKeyboardTheme(mLatinIME /* context */));
+                mLatinIME, KeyboardTheme.getKeyboardTheme(mPrefs));
         if (themeUpdated && mKeyboardView != null) {
             mLatinIME.setInputView(onCreateInputView(mIsHardwareAcceleratedDrawingEnabled));
         }
@@ -343,7 +348,7 @@
         }
 
         updateKeyboardThemeAndContextThemeWrapper(
-                mLatinIME, KeyboardTheme.getKeyboardTheme(mLatinIME /* context */));
+                mLatinIME, KeyboardTheme.getKeyboardTheme(mPrefs));
         mCurrentInputView = (InputView)LayoutInflater.from(mThemeContext).inflate(
                 R.layout.input_view, null);
         mMainKeyboardFrame = mCurrentInputView.findViewById(R.id.main_keyboard_frame);
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java b/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java
index 6d8c8b7..7161d3f 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java
@@ -16,17 +16,14 @@
 
 package com.android.inputmethod.keyboard;
 
-import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Build.VERSION_CODES;
-import android.preference.PreferenceManager;
 import android.util.Log;
 
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.compat.BuildCompatUtils;
 import com.android.inputmethod.latin.R;
 
-import java.util.ArrayList;
 import java.util.Arrays;
 
 public final class KeyboardTheme implements Comparable<KeyboardTheme> {
@@ -43,10 +40,7 @@
     public static final int THEME_ID_LXX_DARK = 4;
     public static final int DEFAULT_THEME_ID = THEME_ID_KLP;
 
-    private static KeyboardTheme[] AVAILABLE_KEYBOARD_THEMES;
-
-    @UsedForTesting
-    static final KeyboardTheme[] KEYBOARD_THEMES = {
+    private static final KeyboardTheme[] KEYBOARD_THEMES = {
         new KeyboardTheme(THEME_ID_ICS, "ICS", R.style.KeyboardTheme_ICS,
                 // This has never been selected because we support ICS or later.
                 VERSION_CODES.BASE),
@@ -99,10 +93,9 @@
     }
 
     @UsedForTesting
-    static KeyboardTheme searchKeyboardThemeById(final int themeId,
-            final KeyboardTheme[] availableThemeIds) {
+    static KeyboardTheme searchKeyboardThemeById(final int themeId) {
         // TODO: This search algorithm isn't optimal if there are many themes.
-        for (final KeyboardTheme theme : availableThemeIds) {
+        for (final KeyboardTheme theme : KEYBOARD_THEMES) {
             if (theme.mThemeId == themeId) {
                 return theme;
             }
@@ -112,14 +105,13 @@
 
     @UsedForTesting
     static KeyboardTheme getDefaultKeyboardTheme(final SharedPreferences prefs,
-            final int sdkVersion, final KeyboardTheme[] availableThemeArray) {
+            final int sdkVersion) {
         final String klpThemeIdString = prefs.getString(KLP_KEYBOARD_THEME_KEY, null);
         if (klpThemeIdString != null) {
             if (sdkVersion <= VERSION_CODES.KITKAT) {
                 try {
                     final int themeId = Integer.parseInt(klpThemeIdString);
-                    final KeyboardTheme theme = searchKeyboardThemeById(themeId,
-                            availableThemeArray);
+                    final KeyboardTheme theme = searchKeyboardThemeById(themeId);
                     if (theme != null) {
                         return theme;
                     }
@@ -133,21 +125,22 @@
             prefs.edit().remove(KLP_KEYBOARD_THEME_KEY).apply();
         }
         // TODO: This search algorithm isn't optimal if there are many themes.
-        for (final KeyboardTheme theme : availableThemeArray) {
+        for (final KeyboardTheme theme : KEYBOARD_THEMES) {
             if (sdkVersion >= theme.mMinApiVersion) {
                 return theme;
             }
         }
-        return searchKeyboardThemeById(DEFAULT_THEME_ID, availableThemeArray);
+        return searchKeyboardThemeById(DEFAULT_THEME_ID);
     }
 
     public static String getKeyboardThemeName(final int themeId) {
-        final KeyboardTheme theme = searchKeyboardThemeById(themeId, KEYBOARD_THEMES);
+        final KeyboardTheme theme = searchKeyboardThemeById(themeId);
         return theme.mThemeName;
     }
 
-    public static void saveKeyboardThemeId(final int themeId, final SharedPreferences prefs) {
-        saveKeyboardThemeId(themeId, prefs, BuildCompatUtils.EFFECTIVE_SDK_INT);
+    public static void saveKeyboardThemeId(final String themeIdString,
+            final SharedPreferences prefs) {
+        saveKeyboardThemeId(themeIdString, prefs, BuildCompatUtils.EFFECTIVE_SDK_INT);
     }
 
     @UsedForTesting
@@ -159,45 +152,25 @@
     }
 
     @UsedForTesting
-    static void saveKeyboardThemeId(final int themeId, final SharedPreferences prefs,
-            final int sdkVersion) {
+    static void saveKeyboardThemeId(final String themeIdString,
+            final SharedPreferences prefs, final int sdkVersion) {
         final String prefKey = getPreferenceKey(sdkVersion);
-        prefs.edit().putString(prefKey, Integer.toString(themeId)).apply();
+        prefs.edit().putString(prefKey, themeIdString).apply();
     }
 
-    public static KeyboardTheme getKeyboardTheme(final Context context) {
-        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        final KeyboardTheme[] availableThemeArray = getAvailableThemeArray(context);
-        return getKeyboardTheme(prefs, BuildCompatUtils.EFFECTIVE_SDK_INT, availableThemeArray);
-    }
-
-    static KeyboardTheme[] getAvailableThemeArray(final Context context) {
-        if (AVAILABLE_KEYBOARD_THEMES == null) {
-            final int[] availableThemeIdStringArray = context.getResources().getIntArray(
-                    R.array.keyboard_theme_ids);
-            final ArrayList<KeyboardTheme> availableThemeList = new ArrayList<>();
-            for (final int id : availableThemeIdStringArray) {
-                final KeyboardTheme theme = searchKeyboardThemeById(id, KEYBOARD_THEMES);
-                if (theme != null) {
-                    availableThemeList.add(theme);
-                }
-            }
-            AVAILABLE_KEYBOARD_THEMES = availableThemeList.toArray(
-                    new KeyboardTheme[availableThemeList.size()]);
-        }
-        return AVAILABLE_KEYBOARD_THEMES;
+    public static KeyboardTheme getKeyboardTheme(final SharedPreferences prefs) {
+        return getKeyboardTheme(prefs, BuildCompatUtils.EFFECTIVE_SDK_INT);
     }
 
     @UsedForTesting
-    static KeyboardTheme getKeyboardTheme(final SharedPreferences prefs, final int sdkVersion,
-            final KeyboardTheme[] availableThemeArray) {
+    static KeyboardTheme getKeyboardTheme(final SharedPreferences prefs, final int sdkVersion) {
         final String lxxThemeIdString = prefs.getString(LXX_KEYBOARD_THEME_KEY, null);
         if (lxxThemeIdString == null) {
-            return getDefaultKeyboardTheme(prefs, sdkVersion, availableThemeArray);
+            return getDefaultKeyboardTheme(prefs, sdkVersion);
         }
         try {
             final int themeId = Integer.parseInt(lxxThemeIdString);
-            final KeyboardTheme theme = searchKeyboardThemeById(themeId, availableThemeArray);
+            final KeyboardTheme theme = searchKeyboardThemeById(themeId);
             if (theme != null) {
                 return theme;
             }
@@ -207,6 +180,6 @@
         }
         // Remove preference that contains unknown or illegal theme id.
         prefs.edit().remove(LXX_KEYBOARD_THEME_KEY).apply();
-        return getDefaultKeyboardTheme(prefs, sdkVersion, availableThemeArray);
+        return getDefaultKeyboardTheme(prefs, sdkVersion);
     }
 }
diff --git a/java/src/com/android/inputmethod/latin/settings/ThemeSettingsFragment.java b/java/src/com/android/inputmethod/latin/settings/ThemeSettingsFragment.java
index 29289ae..5a3fc36 100644
--- a/java/src/com/android/inputmethod/latin/settings/ThemeSettingsFragment.java
+++ b/java/src/com/android/inputmethod/latin/settings/ThemeSettingsFragment.java
@@ -17,6 +17,7 @@
 package com.android.inputmethod.latin.settings;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.os.Bundle;
 import android.preference.Preference;
@@ -31,12 +32,12 @@
  */
 public final class ThemeSettingsFragment extends SubScreenFragment
         implements OnRadioButtonClickedListener {
-    private int mSelectedThemeId;
+    private String mSelectedThemeId;
 
     static class KeyboardThemePreference extends RadioButtonPreference {
-        final int mThemeId;
+        final String mThemeId;
 
-        KeyboardThemePreference(final Context context, final String name, final int id) {
+        KeyboardThemePreference(final Context context, final String name, final String id) {
             super(context);
             setTitle(name);
             mThemeId = id;
@@ -44,13 +45,14 @@
     }
 
     static void updateKeyboardThemeSummary(final Preference pref) {
-        final Context context = pref.getContext();
-        final Resources res = context.getResources();
-        final KeyboardTheme keyboardTheme = KeyboardTheme.getKeyboardTheme(context);
+        final Resources res = pref.getContext().getResources();
+        final SharedPreferences prefs = pref.getSharedPreferences();
+        final KeyboardTheme keyboardTheme = KeyboardTheme.getKeyboardTheme(prefs);
+        final String keyboardThemeId = String.valueOf(keyboardTheme.mThemeId);
         final String[] keyboardThemeNames = res.getStringArray(R.array.keyboard_theme_names);
-        final int[] keyboardThemeIds = res.getIntArray(R.array.keyboard_theme_ids);
+        final String[] keyboardThemeIds = res.getStringArray(R.array.keyboard_theme_ids);
         for (int index = 0; index < keyboardThemeNames.length; index++) {
-            if (keyboardTheme.mThemeId == keyboardThemeIds[index]) {
+            if (keyboardThemeId.equals(keyboardThemeIds[index])) {
                 pref.setSummary(keyboardThemeNames[index]);
                 return;
             }
@@ -62,18 +64,18 @@
         super.onCreate(icicle);
         addPreferencesFromResource(R.xml.prefs_screen_theme);
         final PreferenceScreen screen = getPreferenceScreen();
-        final Context context = getActivity();
         final Resources res = getResources();
         final String[] keyboardThemeNames = res.getStringArray(R.array.keyboard_theme_names);
-        final int[] keyboardThemeIds = res.getIntArray(R.array.keyboard_theme_ids);
+        final String[] keyboardThemeIds = res.getStringArray(R.array.keyboard_theme_ids);
         for (int index = 0; index < keyboardThemeNames.length; index++) {
             final KeyboardThemePreference pref = new KeyboardThemePreference(
-                    context, keyboardThemeNames[index], keyboardThemeIds[index]);
+                    getActivity(), keyboardThemeNames[index], keyboardThemeIds[index]);
             screen.addPreference(pref);
             pref.setOnRadioButtonClickedListener(this);
         }
-        final KeyboardTheme keyboardTheme = KeyboardTheme.getKeyboardTheme(context);
-        mSelectedThemeId = keyboardTheme.mThemeId;
+        final SharedPreferences prefs = getSharedPreferences();
+        final KeyboardTheme keyboardTheme = KeyboardTheme.getKeyboardTheme(prefs);
+        mSelectedThemeId = String.valueOf(keyboardTheme.mThemeId);
     }
 
     @Override
@@ -104,7 +106,7 @@
             final Preference preference = screen.getPreference(index);
             if (preference instanceof KeyboardThemePreference) {
                 final KeyboardThemePreference pref = (KeyboardThemePreference)preference;
-                final boolean selected = (mSelectedThemeId == pref.mThemeId);
+                final boolean selected = mSelectedThemeId.equals(pref.mThemeId);
                 pref.setSelected(selected);
             }
         }