diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index cced45d..76e76cc 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -41,26 +41,24 @@
              checkable+checked+pressed. -->
         <attr name="keyBackground" format="reference" />
 
-        <!-- Size of the text for one letter keys. If not defined, keyLetterRatio takes effect. -->
-        <attr name="keyLetterSize" format="dimension" />
-        <!-- Size of the text for keys with multiple letters. If not defined, keyLabelRatio takes
-             effect. -->
-        <attr name="keyLabelSize" format="dimension" />
-        <!-- Size of the text for one letter keys, in the proportion of key height. -->
-        <attr name="keyLetterRatio" format="float" />
+        <!-- Size of the text for one letter keys. If specified as fraction, the text size is
+             measured in the proportion of key height. -->
+        <attr name="keyLetterSize" format="dimension|fraction" />
+        <!-- Size of the text for keys with multiple letters. If specified as fraction, the text
+             size is measured in the proportion of key height. -->
+        <attr name="keyLabelSize" format="dimension|fraction" />
         <!-- Large size of the text for one letter keys, in the proportion of key height. -->
-        <attr name="keyLargeLetterRatio" format="float" />
-        <!-- Size of the text for keys with multiple letters, in the proportion of key height. -->
-        <attr name="keyLabelRatio" format="float" />
+        <attr name="keyLargeLetterRatio" format="fraction" />
         <!-- Large size of the text for keys with multiple letters, in the proportion of key height. -->
-        <attr name="keyLargeLabelRatio" format="float" />
+        <attr name="keyLargeLabelRatio" format="fraction" />
         <!-- Size of the text for hint letter (= one character hint label), in the proportion of
              key height. -->
-        <attr name="keyHintLetterRatio" format="float" />
+        <attr name="keyHintLetterRatio" format="fraction" />
         <!-- Size of the text for hint label, in the proportion of key height. -->
-        <attr name="keyHintLabelRatio" format="float" />
+        <attr name="keyHintLabelRatio" format="fraction" />
         <!-- Size of the text for shifted letter hint, in the proportion of key height. -->
-        <attr name="keyShiftedLetterHintRatio" format="float" />
+        <attr name="keyShiftedLetterHintRatio" format="dimension|fraction" />
+
         <!-- Horizontal padding of left/right aligned key label to the edge of the key. -->
         <attr name="keyLabelHorizontalPadding" format="dimension" />
         <!-- Right padding of hint letter to the edge of the key.-->
@@ -96,8 +94,8 @@
         <attr name="keyPreviewOffset" format="dimension" />
         <!-- Height of the key press feedback popup. -->
         <attr name="keyPreviewHeight" format="dimension" />
-        <!-- Size of the text for key press feedback popup, int the proportion of key height -->
-        <attr name="keyPreviewTextRatio" format="float" />
+        <!-- Size of the text for key press feedback popup, in the proportion of key height. -->
+        <attr name="keyPreviewTextRatio" format="fraction" />
         <!-- Delay after key releasing and key press feedback dismissing in millisecond -->
         <attr name="keyPreviewLingerTimeout" format="integer" />
 
@@ -187,13 +185,13 @@
         <attr name="colorTypedWord" format="color" />
         <attr name="colorAutoCorrect" format="color" />
         <attr name="colorSuggested" format="color" />
-        <attr name="alphaValidTypedWord" format="integer" />
-        <attr name="alphaTypedWord" format="integer" />
-        <attr name="alphaAutoCorrect" format="integer" />
-        <attr name="alphaSuggested" format="integer" />
-        <attr name="alphaObsoleted" format="integer" />
+        <attr name="alphaValidTypedWord" format="fraction" />
+        <attr name="alphaTypedWord" format="fraction" />
+        <attr name="alphaAutoCorrect" format="fraction" />
+        <attr name="alphaSuggested" format="fraction" />
+        <attr name="alphaObsoleted" format="fraction" />
         <attr name="suggestionsCountInStrip" format="integer" />
-        <attr name="centerSuggestionPercentile" format="integer" />
+        <attr name="centerSuggestionPercentile" format="fraction" />
         <attr name="maxMoreSuggestionsRow" format="integer" />
         <attr name="minMoreSuggestionsWidth" format="float" />
     </declare-styleable>
diff --git a/java/res/values/dimens.xml b/java/res/values/dimens.xml
index c59bad3..565059b 100644
--- a/java/res/values/dimens.xml
+++ b/java/res/values/dimens.xml
@@ -92,7 +92,7 @@
     <dimen name="suggestion_text_size">18dp</dimen>
     <dimen name="more_suggestions_hint_text_size">27dp</dimen>
     <integer name="suggestions_count_in_strip">3</integer>
-    <integer name="center_suggestion_percentile">36</integer>
+    <fraction name="center_suggestion_percentile">36%</fraction>
 
     <!-- Gesture preview parameters -->
     <dimen name="gesture_preview_trail_width">2.5dp</dimen>
diff --git a/java/res/values/styles.xml b/java/res/values/styles.xml
index e5e7fed..0220c83 100644
--- a/java/res/values/styles.xml
+++ b/java/res/values/styles.xml
@@ -35,9 +35,9 @@
     <style name="KeyboardView">
         <item name="android:background">@drawable/keyboard_background</item>
         <item name="keyBackground">@drawable/btn_keyboard_key</item>
-        <item name="keyLetterRatio">@fraction/key_letter_ratio</item>
+        <item name="keyLetterSize">@fraction/key_letter_ratio</item>
         <item name="keyLargeLetterRatio">@fraction/key_large_letter_ratio</item>
-        <item name="keyLabelRatio">@fraction/key_label_ratio</item>
+        <item name="keyLabelSize">@fraction/key_label_ratio</item>
         <item name="keyLargeLabelRatio">@fraction/key_large_label_ratio</item>
         <item name="keyHintLetterRatio">@fraction/key_hint_letter_ratio</item>
         <item name="keyHintLabelRatio">@fraction/key_hint_label_ratio</item>
@@ -138,9 +138,9 @@
         <item name="colorTypedWord">@android:color/white</item>
         <item name="colorAutoCorrect">#FFFCAE00</item>
         <item name="colorSuggested">#FFFCAE00</item>
-        <item name="alphaObsoleted">50</item>
+        <item name="alphaObsoleted">50%</item>
         <item name="suggestionsCountInStrip">@integer/suggestions_count_in_strip</item>
-        <item name="centerSuggestionPercentile">@integer/center_suggestion_percentile</item>
+        <item name="centerSuggestionPercentile">@fraction/center_suggestion_percentile</item>
         <item name="maxMoreSuggestionsRow">@integer/max_more_suggestions_row</item>
         <item name="minMoreSuggestionsWidth">@fraction/min_more_suggestions_width</item>
     </style>
@@ -373,12 +373,12 @@
         <item name="colorTypedWord">@android:color/holo_blue_light</item>
         <item name="colorAutoCorrect">@android:color/holo_blue_light</item>
         <item name="colorSuggested">@android:color/holo_blue_light</item>
-        <item name="alphaValidTypedWord">85</item>
-        <item name="alphaTypedWord">85</item>
-        <item name="alphaSuggested">70</item>
-        <item name="alphaObsoleted">70</item>
+        <item name="alphaValidTypedWord">85%</item>
+        <item name="alphaTypedWord">85%</item>
+        <item name="alphaSuggested">70%</item>
+        <item name="alphaObsoleted">70%</item>
         <item name="suggestionsCountInStrip">@integer/suggestions_count_in_strip</item>
-        <item name="centerSuggestionPercentile">@integer/center_suggestion_percentile</item>
+        <item name="centerSuggestionPercentile">@fraction/center_suggestion_percentile</item>
         <item name="maxMoreSuggestionsRow">@integer/max_more_suggestions_row</item>
         <item name="minMoreSuggestionsWidth">@fraction/min_more_suggestions_width</item>
     </style>
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index 0a70605..79fe43b 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -84,6 +84,8 @@
 
     // Miscellaneous constants
     private static final int[] LONG_PRESSABLE_STATE_SET = { android.R.attr.state_long_pressable };
+    private static final float UNDEFINED_RATIO = -1.0f;
+    private static final int UNDEFINED_DIMENSION = -1;
 
     // XML attributes
     protected final float mVerticalCorrection;
@@ -202,7 +204,6 @@
         private final float mKeyHintLetterRatio;
         private final float mKeyShiftedLetterHintRatio;
         private final float mKeyHintLabelRatio;
-        private static final float UNDEFINED_RATIO = -1.0f;
 
         public final Rect mPadding = new Rect();
         public int mKeyLetterSize;
@@ -214,26 +215,22 @@
         public int mKeyHintLabelSize;
         public int mAnimAlpha;
 
-        public KeyDrawParams(TypedArray a) {
+        public KeyDrawParams(final TypedArray a) {
             mKeyBackground = a.getDrawable(R.styleable.KeyboardView_keyBackground);
-            if (a.hasValue(R.styleable.KeyboardView_keyLetterSize)) {
-                mKeyLetterRatio = UNDEFINED_RATIO;
-                mKeyLetterSize = a.getDimensionPixelSize(R.styleable.KeyboardView_keyLetterSize, 0);
-            } else {
-                mKeyLetterRatio = getRatio(a, R.styleable.KeyboardView_keyLetterRatio);
+            if (!isValidFraction(mKeyLetterRatio = getFraction(a,
+                    R.styleable.KeyboardView_keyLetterSize))) {
+                mKeyLetterSize = getDimensionPixelSize(a, R.styleable.KeyboardView_keyLetterSize);
             }
-            if (a.hasValue(R.styleable.KeyboardView_keyLabelSize)) {
-                mKeyLabelRatio = UNDEFINED_RATIO;
-                mKeyLabelSize = a.getDimensionPixelSize(R.styleable.KeyboardView_keyLabelSize, 0);
-            } else {
-                mKeyLabelRatio = getRatio(a, R.styleable.KeyboardView_keyLabelRatio);
+            if (!isValidFraction(mKeyLabelRatio = getFraction(a,
+                    R.styleable.KeyboardView_keyLabelSize))) {
+                mKeyLabelSize = getDimensionPixelSize(a, R.styleable.KeyboardView_keyLabelSize);
             }
-            mKeyLargeLabelRatio = getRatio(a, R.styleable.KeyboardView_keyLargeLabelRatio);
-            mKeyLargeLetterRatio = getRatio(a, R.styleable.KeyboardView_keyLargeLetterRatio);
-            mKeyHintLetterRatio = getRatio(a, R.styleable.KeyboardView_keyHintLetterRatio);
-            mKeyShiftedLetterHintRatio = getRatio(a,
+            mKeyLargeLabelRatio = getFraction(a, R.styleable.KeyboardView_keyLargeLabelRatio);
+            mKeyLargeLetterRatio = getFraction(a, R.styleable.KeyboardView_keyLargeLetterRatio);
+            mKeyHintLetterRatio = getFraction(a, R.styleable.KeyboardView_keyHintLetterRatio);
+            mKeyShiftedLetterHintRatio = getFraction(a,
                     R.styleable.KeyboardView_keyShiftedLetterHintRatio);
-            mKeyHintLabelRatio = getRatio(a, R.styleable.KeyboardView_keyHintLabelRatio);
+            mKeyHintLabelRatio = getFraction(a, R.styleable.KeyboardView_keyHintLabelRatio);
             mKeyLabelHorizontalPadding = a.getDimension(
                     R.styleable.KeyboardView_keyLabelHorizontalPadding, 0);
             mKeyHintLetterPadding = a.getDimension(
@@ -260,10 +257,10 @@
         }
 
         public void updateKeyHeight(int keyHeight) {
-            if (mKeyLetterRatio >= 0.0f) {
+            if (isValidFraction(mKeyLetterRatio)) {
                 mKeyLetterSize = (int)(keyHeight * mKeyLetterRatio);
             }
-            if (mKeyLabelRatio >= 0.0f) {
+            if (isValidFraction(mKeyLabelRatio)) {
                 mKeyLabelSize = (int)(keyHeight * mKeyLabelRatio);
             }
             mKeyLargeLabelSize = (int)(keyHeight * mKeyLargeLabelRatio);
@@ -338,7 +335,7 @@
                     R.styleable.KeyboardView_keyPreviewOffset, 0);
             mPreviewHeight = a.getDimensionPixelSize(
                     R.styleable.KeyboardView_keyPreviewHeight, 80);
-            mPreviewTextRatio = getRatio(a, R.styleable.KeyboardView_keyPreviewTextRatio);
+            mPreviewTextRatio = getFraction(a, R.styleable.KeyboardView_keyPreviewTextRatio);
             mPreviewTextColor = a.getColor(R.styleable.KeyboardView_keyPreviewTextColor, 0);
             mLingerTimeout = a.getInt(R.styleable.KeyboardView_keyPreviewLingerTimeout, 0);
 
@@ -387,9 +384,24 @@
         mPaint.setAntiAlias(true);
     }
 
-    // Read fraction value in TypedArray as float.
-    /* package */ static float getRatio(TypedArray a, int index) {
-        return a.getFraction(index, 1000, 1000, 1) / 1000.0f;
+    static boolean isValidFraction(final float fraction) {
+        return fraction >= 0.0f;
+    }
+
+    static float getFraction(final TypedArray a, final int index) {
+        final TypedValue value = a.peekValue(index);
+        if (value == null || value.type != TypedValue.TYPE_FRACTION) {
+            return UNDEFINED_RATIO;
+        }
+        return a.getFraction(index, 1, 1, UNDEFINED_RATIO);
+    }
+
+    public static int getDimensionPixelSize(final TypedArray a, final int index) {
+        final TypedValue value = a.peekValue(index);
+        if (value == null || value.type != TypedValue.TYPE_DIMENSION) {
+            return UNDEFINED_DIMENSION;
+        }
+        return a.getDimensionPixelSize(index, UNDEFINED_DIMENSION);
     }
 
     /**
diff --git a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
index 0cc0b63..df84271 100644
--- a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
@@ -344,8 +344,8 @@
                 R.styleable.MainKeyboardView_autoCorrectionSpacebarLedEnabled, false);
         mAutoCorrectionSpacebarLedIcon = a.getDrawable(
                 R.styleable.MainKeyboardView_autoCorrectionSpacebarLedIcon);
-        mSpacebarTextRatio = a.getFraction(R.styleable.MainKeyboardView_spacebarTextRatio,
-                1000, 1000, 1) / 1000.0f;
+        mSpacebarTextRatio = a.getFraction(
+                R.styleable.MainKeyboardView_spacebarTextRatio, 1, 1, 1.0f);
         mSpacebarTextColor = a.getColor(R.styleable.MainKeyboardView_spacebarTextColor, 0);
         mSpacebarTextShadowColor = a.getColor(
                 R.styleable.MainKeyboardView_spacebarTextShadowColor, 0);
diff --git a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
index afc4293..03263d2 100644
--- a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
+++ b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
@@ -132,7 +132,7 @@
 
     private static class SuggestionStripViewParams {
         private static final int DEFAULT_SUGGESTIONS_COUNT_IN_STRIP = 3;
-        private static final int DEFAULT_CENTER_SUGGESTION_PERCENTILE = 40;
+        private static final float DEFAULT_CENTER_SUGGESTION_PERCENTILE = 0.40f;
         private static final int DEFAULT_MAX_MORE_SUGGESTIONS_ROW = 2;
         private static final int PUNCTUATIONS_IN_STRIP = 5;
 
@@ -196,16 +196,16 @@
                     R.styleable.SuggestionStripView, defStyle, R.style.SuggestionStripViewStyle);
             mSuggestionStripOption = a.getInt(
                     R.styleable.SuggestionStripView_suggestionStripOption, 0);
-            final float alphaValidTypedWord = getPercent(a,
-                    R.styleable.SuggestionStripView_alphaValidTypedWord, 100);
-            final float alphaTypedWord = getPercent(a,
-                    R.styleable.SuggestionStripView_alphaTypedWord, 100);
-            final float alphaAutoCorrect = getPercent(a,
-                    R.styleable.SuggestionStripView_alphaAutoCorrect, 100);
-            final float alphaSuggested = getPercent(a,
-                    R.styleable.SuggestionStripView_alphaSuggested, 100);
-            mAlphaObsoleted = getPercent(a,
-                    R.styleable.SuggestionStripView_alphaSuggested, 100);
+            final float alphaValidTypedWord = getFraction(a,
+                    R.styleable.SuggestionStripView_alphaValidTypedWord, 1.0f);
+            final float alphaTypedWord = getFraction(a,
+                    R.styleable.SuggestionStripView_alphaTypedWord, 1.0f);
+            final float alphaAutoCorrect = getFraction(a,
+                    R.styleable.SuggestionStripView_alphaAutoCorrect, 1.0f);
+            final float alphaSuggested = getFraction(a,
+                    R.styleable.SuggestionStripView_alphaSuggested, 1.0f);
+            mAlphaObsoleted = getFraction(a,
+                    R.styleable.SuggestionStripView_alphaSuggested, 1.0f);
             mColorValidTypedWord = applyAlpha(a.getColor(
                     R.styleable.SuggestionStripView_colorValidTypedWord, 0), alphaValidTypedWord);
             mColorTypedWord = applyAlpha(a.getColor(
@@ -217,14 +217,14 @@
             mSuggestionsCountInStrip = a.getInt(
                     R.styleable.SuggestionStripView_suggestionsCountInStrip,
                     DEFAULT_SUGGESTIONS_COUNT_IN_STRIP);
-            mCenterSuggestionWeight = getPercent(a,
+            mCenterSuggestionWeight = getFraction(a,
                     R.styleable.SuggestionStripView_centerSuggestionPercentile,
                     DEFAULT_CENTER_SUGGESTION_PERCENTILE);
             mMaxMoreSuggestionsRow = a.getInt(
                     R.styleable.SuggestionStripView_maxMoreSuggestionsRow,
                     DEFAULT_MAX_MORE_SUGGESTIONS_ROW);
-            mMinMoreSuggestionsWidth = getRatio(a,
-                    R.styleable.SuggestionStripView_minMoreSuggestionsWidth);
+            mMinMoreSuggestionsWidth = getFraction(a,
+                    R.styleable.SuggestionStripView_minMoreSuggestionsWidth, 1.0f);
             a.recycle();
 
             mMoreSuggestionsHint = getMoreSuggestionsHint(res,
@@ -278,14 +278,8 @@
             return new BitmapDrawable(res, buffer);
         }
 
-        // Read integer value in TypedArray as percent.
-        private static float getPercent(TypedArray a, int index, int defValue) {
-            return a.getInt(index, defValue) / 100.0f;
-        }
-
-        // Read fraction value in TypedArray as float.
-        private static float getRatio(TypedArray a, int index) {
-            return a.getFraction(index, 1000, 1000, 1) / 1000.0f;
+        static float getFraction(final TypedArray a, final int index, final float defValue) {
+            return a.getFraction(index, 1, 1, defValue);
         }
 
         private CharSequence getStyledSuggestionWord(SuggestedWords suggestedWords, int pos) {