diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 1776630..2a76321 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <declare-styleable name="KeyboardTheme">
+        <attr name="themeId" format="integer" />
         <!-- Keyboard style -->
         <attr name="keyboardStyle" format="reference" />
         <!-- LatinKeyboard style -->
diff --git a/java/res/values/themes-basic-highcontrast.xml b/java/res/values/themes-basic-highcontrast.xml
index ce05980..9127235 100644
--- a/java/res/values/themes-basic-highcontrast.xml
+++ b/java/res/values/themes-basic-highcontrast.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme.HighContrast" parent="KeyboardIcons">
+        <item name="themeId">1</item>
         <item name="keyboardStyle">@style/Keyboard</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard</item>
         <item name="keyboardViewStyle">@style/KeyboardView.HighContrast</item>
diff --git a/java/res/values/themes-basic.xml b/java/res/values/themes-basic.xml
index ff9fed5..6c0e16e 100644
--- a/java/res/values/themes-basic.xml
+++ b/java/res/values/themes-basic.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme" parent="KeyboardIcons">
+        <item name="themeId">0</item>
         <item name="keyboardStyle">@style/Keyboard</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard</item>
         <item name="keyboardViewStyle">@style/KeyboardView</item>
diff --git a/java/res/values/themes-gingerbread.xml b/java/res/values/themes-gingerbread.xml
index be853eb..43bff50 100644
--- a/java/res/values/themes-gingerbread.xml
+++ b/java/res/values/themes-gingerbread.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme.Gingerbread" parent="KeyboardIcons">
+        <item name="themeId">8</item>
         <item name="keyboardStyle">@style/Keyboard.Gingerbread</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard</item>
         <item name="keyboardViewStyle">@style/KeyboardView.Gingerbread</item>
diff --git a/java/res/values/themes-ics.xml b/java/res/values/themes-ics.xml
index 618aaed..1235d4e 100644
--- a/java/res/values/themes-ics.xml
+++ b/java/res/values/themes-ics.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme.IceCreamSandwich" parent="KeyboardIcons.IceCreamSandwich">
+        <item name="themeId">5</item>
         <item name="keyboardStyle">@style/Keyboard.IceCreamSandwich</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard.IceCreamSandwich</item>
         <item name="keyboardViewStyle">@style/KeyboardView.IceCreamSandwich</item>
diff --git a/java/res/values/themes-stone-bold.xml b/java/res/values/themes-stone-bold.xml
index fdf9c51..6e25f41 100644
--- a/java/res/values/themes-stone-bold.xml
+++ b/java/res/values/themes-stone-bold.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme.Stone.Bold" parent="KeyboardIcons.Black">
+        <item name="themeId">7</item>
         <item name="keyboardStyle">@style/Keyboard.Stone</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard.Stone</item>
         <item name="keyboardViewStyle">@style/KeyboardView.Stone.Bold</item>
diff --git a/java/res/values/themes-stone.xml b/java/res/values/themes-stone.xml
index cb3edc5..3cbda81 100644
--- a/java/res/values/themes-stone.xml
+++ b/java/res/values/themes-stone.xml
@@ -16,6 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme.Stone" parent="KeyboardIcons.Black">
+        <item name="themeId">6</item>
         <item name="keyboardStyle">@style/Keyboard.Stone</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard.Stone</item>
         <item name="keyboardViewStyle">@style/KeyboardView.Stone</item>
diff --git a/java/src/com/android/inputmethod/keyboard/Keyboard.java b/java/src/com/android/inputmethod/keyboard/Keyboard.java
index 2f11164..d8f8bef 100644
--- a/java/src/com/android/inputmethod/keyboard/Keyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/Keyboard.java
@@ -84,6 +84,7 @@
     public static final int CODE_UNSPECIFIED = -99;
 
     public final KeyboardId mId;
+    public final int mThemeId;
 
     /** Total height of the keyboard, including the padding and keys */
     public final int mOccupiedHeight;
@@ -121,6 +122,7 @@
 
     public Keyboard(KeyboardParams params) {
         mId = params.mId;
+        mThemeId = params.mThemeId;
         mOccupiedHeight = params.mOccupiedHeight;
         mOccupiedWidth = params.mOccupiedWidth;
         mMostCommonKeyHeight = params.mMostCommonKeyHeight;
@@ -238,4 +240,17 @@
     public int[] getNearestKeys(int x, int y) {
         return mProximityInfo.getNearestKeys(x, y);
     }
+
+    public static String themeName(int themeId) {
+        // This should be aligned with theme-*.xml resource files' themeId attribute.
+        switch (themeId) {
+        case 0: return "Basic";
+        case 1: return "BasicHighContrast";
+        case 5: return "IceCreamSandwich";
+        case 6: return "Stone";
+        case 7: return "StoneBold";
+        case 8: return "GingerBread";
+        default: return null;
+        }
+    }
 }
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index a468435..13e8ba1 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -275,10 +275,12 @@
 
             if (DEBUG_CACHE) {
                 Log.d(TAG, "keyboard cache size=" + mKeyboardCache.size() + ": "
-                        + ((ref == null) ? "LOAD" : "GCed") + " id=" + id);
+                        + ((ref == null) ? "LOAD" : "GCed") + " id=" + id
+                        + " theme=" + Keyboard.themeName(keyboard.mThemeId));
             }
         } else if (DEBUG_CACHE) {
-            Log.d(TAG, "keyboard cache size=" + mKeyboardCache.size() + ": HIT  id=" + id);
+            Log.d(TAG, "keyboard cache size=" + mKeyboardCache.size() + ": HIT  id=" + id
+                    + " theme=" + Keyboard.themeName(keyboard.mThemeId));
         }
 
         keyboard.onAutoCorrectionStateChanged(mIsAutoCorrectionActive);
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java b/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
index 99b917c..48f683a 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
@@ -244,6 +244,10 @@
 
         mParams = params;
 
+        final TypedArray a = context.obtainStyledAttributes(R.styleable.KeyboardTheme);
+        mParams.mThemeId = a.getInt(R.styleable.KeyboardTheme_themeId, 0);
+        a.recycle();
+
         mParams.GRID_WIDTH = res.getInteger(R.integer.config_keyboard_grid_width);
         mParams.GRID_HEIGHT = res.getInteger(R.integer.config_keyboard_grid_height);
     }
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyboardParams.java b/java/src/com/android/inputmethod/keyboard/internal/KeyboardParams.java
index 01f9d3b..97f58fa 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyboardParams.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyboardParams.java
@@ -31,6 +31,7 @@
 
 public class KeyboardParams {
     public KeyboardId mId;
+    public int mThemeId;
 
     /** Total height and width of the keyboard, including the paddings and keys */
     public int mOccupiedHeight;