diff --git a/java/res/values-land/dimens.xml b/java/res/values-land/dimens.xml
index c78c25f..d411cb9 100644
--- a/java/res/values-land/dimens.xml
+++ b/java/res/values-land/dimens.xml
@@ -79,4 +79,7 @@
     <dimen name="gesture_floating_preview_text_offset">54dp</dimen>
     <dimen name="gesture_floating_preview_horizontal_padding">23dp</dimen>
     <dimen name="gesture_floating_preview_vertical_padding">15dp</dimen>
+
+    <!-- Emoji keyboard -->
+    <fraction name="emoji_keyboard_key_width">8.3333%p</fraction>
 </resources>
diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 4c50976..7ebaf75 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -215,6 +215,11 @@
         <attr name="iconEmojiKey" format="reference" />
     </declare-styleable>
 
+    <declare-styleable name="Keyboard_GridRows">
+        <attr name="codesArray" format="reference" />
+        <attr name="textsArray" format="reference" />
+    </declare-styleable>
+
     <declare-styleable name="Keyboard_Key">
         <!-- The unicode value that this key outputs.
              Code value represented in hexadecimal prefixed with "0x" or code value reference using
diff --git a/java/res/values/dimens.xml b/java/res/values/dimens.xml
index 98ae76c..bb5f0bb 100644
--- a/java/res/values/dimens.xml
+++ b/java/res/values/dimens.xml
@@ -123,6 +123,9 @@
     <dimen name="gesture_floating_preview_vertical_padding">16dp</dimen>
     <dimen name="gesture_floating_preview_round_radius">3dp</dimen>
 
+    <!-- Emoji keyboard -->
+    <fraction name="emoji_keyboard_key_width">14.2857%p</fraction>
+
     <!-- Inset used in Accessibility mode to avoid accidental key presses when a finger slides off the screen. -->
     <dimen name="accessibility_edge_slop">8dp</dimen>
 
diff --git a/java/res/xml/kbd_emoji_category1.xml b/java/res/xml/kbd_emoji_category1.xml
new file mode 100644
index 0000000..92b0c3f
--- /dev/null
+++ b/java/res/xml/kbd_emoji_category1.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:codesArray="@array/emoji_faces"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/kbd_emoji_category2.xml b/java/res/xml/kbd_emoji_category2.xml
new file mode 100644
index 0000000..17d36c5
--- /dev/null
+++ b/java/res/xml/kbd_emoji_category2.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:codesArray="@array/emoji_objects"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/kbd_emoji_category3.xml b/java/res/xml/kbd_emoji_category3.xml
new file mode 100644
index 0000000..9000a3a
--- /dev/null
+++ b/java/res/xml/kbd_emoji_category3.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:codesArray="@array/emoji_nature"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/kbd_emoji_category4.xml b/java/res/xml/kbd_emoji_category4.xml
new file mode 100644
index 0000000..e79e124
--- /dev/null
+++ b/java/res/xml/kbd_emoji_category4.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:codesArray="@array/emoji_places"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/kbd_emoji_category5.xml b/java/res/xml/kbd_emoji_category5.xml
new file mode 100644
index 0000000..07b3d90
--- /dev/null
+++ b/java/res/xml/kbd_emoji_category5.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:codesArray="@array/emoji_symbols"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/kbd_emoji_category6.xml b/java/res/xml/kbd_emoji_category6.xml
new file mode 100644
index 0000000..a07966b
--- /dev/null
+++ b/java/res/xml/kbd_emoji_category6.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:textsArray="@array/emoji_emoticons"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/kbd_emoji_recents.xml b/java/res/xml/kbd_emoji_recents.xml
new file mode 100644
index 0000000..8b4fa95
--- /dev/null
+++ b/java/res/xml/kbd_emoji_recents.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<Keyboard
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+    latin:keyWidth="@fraction/emoji_keyboard_key_width"
+    latin:keyLetterSize="90%p"
+>
+    <GridRows
+        latin:codesArray="@array/emoji_recents"
+        latin:keyLabelFlags="fontNormal"
+        latin:backgroundType="empty" />
+</Keyboard>
diff --git a/java/res/xml/keyboard_layout_set_emoji.xml b/java/res/xml/keyboard_layout_set_emoji.xml
new file mode 100644
index 0000000..98e6b6b
--- /dev/null
+++ b/java/res/xml/keyboard_layout_set_emoji.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2013, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<KeyboardLayoutSet
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin">
+    <Element
+        latin:elementName="emojiRecents"
+        latin:elementKeyboard="@xml/kbd_emoji_recents" />
+    <Element
+        latin:elementName="emojiCategory1"
+        latin:elementKeyboard="@xml/kbd_emoji_category1" />
+    <Element
+        latin:elementName="emojiCategory2"
+        latin:elementKeyboard="@xml/kbd_emoji_category2" />
+    <Element
+        latin:elementName="emojiCategory3"
+        latin:elementKeyboard="@xml/kbd_emoji_category3" />
+    <Element
+        latin:elementName="emojiCategory4"
+        latin:elementKeyboard="@xml/kbd_emoji_category4" />
+    <Element
+        latin:elementName="emojiCategory5"
+        latin:elementKeyboard="@xml/kbd_emoji_category5" />
+    <Element
+        latin:elementName="emojiCategory6"
+        latin:elementKeyboard="@xml/kbd_emoji_category6" />
+</KeyboardLayoutSet>
diff --git a/java/src/com/android/inputmethod/keyboard/Keyboard.java b/java/src/com/android/inputmethod/keyboard/Keyboard.java
index 0b3737e..23f037f 100644
--- a/java/src/com/android/inputmethod/keyboard/Keyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/Keyboard.java
@@ -51,6 +51,11 @@
     /** Total width of the keyboard, including the padding and keys */
     public final int mOccupiedWidth;
 
+    /** Base height of the keyboard, used to calculate rows' height */
+    public final int mBaseHeight;
+    /** Base width of the keyboard, used to calculate keys' width */
+    public final int mBaseWidth;
+
     /** The padding above the keyboard */
     public final int mTopPadding;
     /** Default gap between rows */
@@ -84,6 +89,8 @@
         mThemeId = params.mThemeId;
         mOccupiedHeight = params.mOccupiedHeight;
         mOccupiedWidth = params.mOccupiedWidth;
+        mBaseHeight = params.mBaseHeight;
+        mBaseWidth = params.mBaseWidth;
         mMostCommonKeyHeight = params.mMostCommonKeyHeight;
         mMostCommonKeyWidth = params.mMostCommonKeyWidth;
         mMoreKeysTemplate = params.mMoreKeysTemplate;
@@ -109,6 +116,8 @@
         mThemeId = keyboard.mThemeId;
         mOccupiedHeight = keyboard.mOccupiedHeight;
         mOccupiedWidth = keyboard.mOccupiedWidth;
+        mBaseHeight = keyboard.mBaseHeight;
+        mBaseWidth = keyboard.mBaseWidth;
         mMostCommonKeyHeight = keyboard.mMostCommonKeyHeight;
         mMostCommonKeyWidth = keyboard.mMostCommonKeyWidth;
         mMoreKeysTemplate = keyboard.mMoreKeysTemplate;
diff --git a/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java b/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
new file mode 100644
index 0000000..c10fdba
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard.internal;
+
+import com.android.inputmethod.latin.Constants;
+
+/**
+ * The string parser of codesArray specification for <GridRows />. The attribute codesArray is an
+ * array of string.
+ * Each element of the array defines a key label by specifying a code point as a hexadecimal string.
+ * A key label may consist of multiple code points separated by comma.
+ * Each element of the array optionally can have an output text definition after vertical bar
+ * marker. An output text may consist of multiple code points separated by comma.
+ * The format of the codesArray element should be:
+ * <pre>
+ *   codePointInHex[,codePoint2InHex]*(|outputTextCodePointInHex[,outputTextCodePoint2InHex]*)?
+ * </pre>
+ */
+// TODO: Write unit tests for this class.
+public final class CodesArrayParser {
+    // Constants for parsing.
+    private static final char COMMA = ',';
+    private static final char VERTICAL_BAR = '|';
+    private static final String COMMA_STRING = ",";
+    private static final int BASE_HEX = 16;
+
+    private CodesArrayParser() {
+     // This utility class is not publicly instantiable.
+    }
+
+    private static String getLabelSpec(final String codesArraySpec) {
+        final int pos = codesArraySpec.indexOf(VERTICAL_BAR);
+        return (pos < 0) ? codesArraySpec : codesArraySpec.substring(0, pos);
+    }
+
+    public static String parseLabel(final String codesArraySpec) {
+        final String labelSpec = getLabelSpec(codesArraySpec);
+        final StringBuilder sb = new StringBuilder();
+        for (final String codeInHex : labelSpec.split(COMMA_STRING)) {
+            final int codePoint = Integer.parseInt(codeInHex, BASE_HEX);
+            sb.appendCodePoint(codePoint);
+        }
+        return sb.toString();
+    }
+
+    private static String getCodeSpec(final String codesArraySpec) {
+        final int pos = codesArraySpec.indexOf(VERTICAL_BAR);
+        return (pos < 0) ? codesArraySpec : codesArraySpec.substring(pos + 1);
+    }
+
+    public static int parseCode(final String codesArraySpec) {
+        final String codeSpec = getCodeSpec(codesArraySpec);
+        if (codeSpec.indexOf(COMMA) < 0) {
+            return Integer.parseInt(codeSpec, BASE_HEX);
+        }
+        return Constants.CODE_OUTPUT_TEXT;
+    }
+
+    public static String parseOutputText(final String codesArraySpec) {
+        final String codeSpec = getCodeSpec(codesArraySpec);
+        if (codeSpec.indexOf(COMMA) < 0) {
+            return null;
+        }
+        final StringBuilder sb = new StringBuilder();
+        for (final String codeInHex : codeSpec.split(COMMA_STRING)) {
+            final int codePoint = Integer.parseInt(codeInHex, BASE_HEX);
+            sb.appendCodePoint(codePoint);
+        }
+        return sb.toString();
+    }
+}
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java b/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
index 3f0773e..8c70389 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
@@ -29,6 +29,7 @@
 import com.android.inputmethod.keyboard.Key;
 import com.android.inputmethod.keyboard.Keyboard;
 import com.android.inputmethod.keyboard.KeyboardId;
+import com.android.inputmethod.latin.Constants;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.utils.ResourceUtils;
 import com.android.inputmethod.latin.utils.RunInLocale;
@@ -113,6 +114,7 @@
  * </pre>
  */
 
+// TODO: Write unit tests for this class.
 public class KeyboardBuilder<KP extends KeyboardParams> {
     private static final String BUILDER_TAG = "Keyboard.Builder";
     private static final boolean DEBUG = false;
@@ -120,6 +122,7 @@
     // Keyboard XML Tags
     private static final String TAG_KEYBOARD = "Keyboard";
     private static final String TAG_ROW = "Row";
+    private static final String TAG_GRID_ROWS = "GridRows";
     private static final String TAG_KEY = "Key";
     private static final String TAG_SPACER = "Spacer";
     private static final String TAG_INCLUDE = "include";
@@ -312,6 +315,9 @@
                         startRow(row);
                     }
                     parseRowContent(parser, row, skip);
+                } else if (TAG_GRID_ROWS.equals(tag)) {
+                    if (DEBUG) startTag("<%s>%s", TAG_GRID_ROWS, skip ? " skipped" : "");
+                    parseGridRows(parser, skip);
                 } else if (TAG_INCLUDE.equals(tag)) {
                     parseIncludeKeyboardContent(parser, skip);
                 } else if (TAG_SWITCH.equals(tag)) {
@@ -389,6 +395,73 @@
         }
     }
 
+    private void parseGridRows(final XmlPullParser parser, final boolean skip)
+            throws XmlPullParserException, IOException {
+        if (skip) {
+            XmlParseUtils.checkEndTag(TAG_GRID_ROWS, parser);
+            if (DEBUG) {
+                startEndTag("<%s /> skipped", TAG_GRID_ROWS);
+            }
+            return;
+        }
+        final KeyboardRow gridRows = new KeyboardRow(mResources, mParams, parser, mCurrentY);
+        final TypedArray gridRowAttr = mResources.obtainAttributes(
+                Xml.asAttributeSet(parser), R.styleable.Keyboard_GridRows);
+        final int codesArrayId = gridRowAttr.getResourceId(
+                R.styleable.Keyboard_GridRows_codesArray, 0);
+        final int textsArrayId = gridRowAttr.getResourceId(
+                R.styleable.Keyboard_GridRows_textsArray, 0);
+        gridRowAttr.recycle();
+        if (codesArrayId == 0 && textsArrayId == 0) {
+            throw new XmlParseUtils.ParseException(
+                    "Missing codesArray or textsArray attributes", parser);
+        }
+        if (codesArrayId != 0 && textsArrayId != 0) {
+            throw new XmlParseUtils.ParseException(
+                    "Both codesArray and textsArray attributes specifed", parser);
+        }
+        final String[] array = mResources.getStringArray(
+                codesArrayId != 0 ? codesArrayId : textsArrayId);
+        final int counts = array.length;
+        final float keyWidth = gridRows.getKeyWidth(null, 0.0f);
+        final int numColumns = (int)(mParams.mOccupiedWidth / keyWidth);
+        for (int index = 0; index < counts; index += numColumns) {
+            final KeyboardRow row = new KeyboardRow(mResources, mParams, parser, mCurrentY);
+            startRow(row);
+            for (int c = 0; c < numColumns; c++) {
+                final int i = index + c;
+                if (i >= counts) {
+                    break;
+                }
+                final String label;
+                final int code;
+                final String outputText;
+                if (codesArrayId != 0) {
+                    final String codeArraySpec = array[i];
+                    label = CodesArrayParser.parseLabel(codeArraySpec);
+                    code = CodesArrayParser.parseCode(codeArraySpec);
+                    outputText = CodesArrayParser.parseOutputText(codeArraySpec);
+                } else {
+                    final String textArraySpec = array[i];
+                    // TODO: Utilize KeySpecParser or write more generic TextsArrayParser.
+                    label = textArraySpec;
+                    code = Constants.CODE_OUTPUT_TEXT;
+                    outputText = textArraySpec + (char)Constants.CODE_SPACE;
+                }
+                final int x = (int)row.getKeyX(null);
+                final int y = row.getKeyY();
+                final Key key = new Key(mParams, label, null /* hintLabel */, 0 /* iconId */,
+                        code, outputText, x, y, (int)keyWidth, (int)row.getRowHeight(),
+                        row.getDefaultKeyLabelFlags(), row.getDefaultBackgroundType());
+                endKey(key);
+                row.advanceXPos(keyWidth);
+            }
+            endRow(row);
+        }
+
+        XmlParseUtils.checkEndTag(TAG_GRID_ROWS, parser);
+    }
+
     private void parseKey(final XmlPullParser parser, final KeyboardRow row, final boolean skip)
             throws XmlPullParserException, IOException {
         if (skip) {
@@ -744,7 +817,10 @@
     }
 
     private void endKeyboard() {
-        // nothing to do here.
+        // {@link #parseGridRows(XmlPullParser,boolean)} may populate keyboard rows higher than
+        // previously expected.
+        final int actualHeight = mCurrentY - mParams.mVerticalGap + mParams.mBottomPadding;
+        mParams.mOccupiedHeight = Math.max(mParams.mOccupiedHeight, actualHeight);
     }
 
     private void addEdgeSpace(final float width, final KeyboardRow row) {
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java
index b95db21..79f5ad8 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictEncoderUtils.java
@@ -326,15 +326,11 @@
             }
             int nodeSize = getNodeHeaderSize(ptNode, formatOptions);
             if (ptNode.isTerminal()) nodeSize += FormatSpec.PTNODE_FREQUENCY_SIZE;
-            if (null == ptNode.mChildren && formatOptions.mSupportsDynamicUpdate) {
+            if (formatOptions.mSupportsDynamicUpdate) {
                 nodeSize += FormatSpec.SIGNED_CHILDREN_ADDRESS_SIZE;
             } else if (null != ptNode.mChildren) {
-                if (formatOptions.mSupportsDynamicUpdate) {
-                    nodeSize += FormatSpec.SIGNED_CHILDREN_ADDRESS_SIZE;
-                } else {
-                    nodeSize += getByteSize(getOffsetToTargetNodeArrayDuringUpdate(ptNodeArray,
-                            nodeSize + size, ptNode.mChildren));
-                }
+                nodeSize += getByteSize(getOffsetToTargetNodeArrayDuringUpdate(ptNodeArray,
+                        nodeSize + size, ptNode.mChildren));
             }
             nodeSize += getShortcutListSize(ptNode.mShortcutTargets);
             if (null != ptNode.mBigrams) {
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
index a08e28c..106f025 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
@@ -148,7 +148,7 @@
      * @throws IOException if the file can't be read.
      * @throws UnsupportedFormatException if the format of the file is not recognized.
      */
-    public static void readUnigramsAndBigramsBinary(final Ver3DictDecoder dictDecoder,
+    /* package */ static void readUnigramsAndBigramsBinary(final Ver3DictDecoder dictDecoder,
             final Map<Integer, String> words, final Map<Integer, Integer> frequencies,
             final Map<Integer, ArrayList<PendingAttribute>> bigrams) throws IOException,
             UnsupportedFormatException {
diff --git a/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java b/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java
index d5fcacc..11a3f0b 100644
--- a/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java
@@ -29,6 +29,8 @@
 import java.io.RandomAccessFile;
 import java.nio.ByteBuffer;
 import java.nio.channels.FileChannel;
+import java.util.ArrayList;
+import java.util.TreeMap;
 
 /**
  * An interface of binary dictionary decoder.
@@ -71,6 +73,21 @@
     public int getTerminalPosition(final String word)
             throws IOException, UnsupportedFormatException;
 
+    /**
+     * Reads unigrams and bigrams from the binary file.
+     * Doesn't store a full memory representation of the dictionary.
+     *
+     * @param words the map to store the address as a key and the word as a value.
+     * @param frequencies the map to store the address as a key and the frequency as a value.
+     * @param bigrams the map to store the address as a key and the list of address as a value.
+     * @throws IOException if the file can't be read.
+     * @throws UnsupportedFormatException if the format of the file is not recognized.
+     */
+    public void readUnigramsAndBigramsBinary(final TreeMap<Integer, String> words,
+            final TreeMap<Integer, Integer> frequencies,
+            final TreeMap<Integer, ArrayList<PendingAttribute>> bigrams)
+            throws IOException, UnsupportedFormatException;
+
     // Flags for DictionaryBufferFactory.
     public static final int USE_READONLY_BYTEBUFFER = 0x01000000;
     public static final int USE_BYTEARRAY = 0x02000000;
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver3DictDecoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver3DictDecoder.java
index 77e6393..1fff9b4 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver3DictDecoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver3DictDecoder.java
@@ -31,6 +31,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.TreeMap;
 
 /**
  * An implementation of DictDecoder for version 3 binary dictionary.
@@ -317,4 +318,16 @@
         }
         return BinaryDictIOUtils.getTerminalPosition(this, word);
     }
+
+    @Override
+    public void readUnigramsAndBigramsBinary(final TreeMap<Integer, String> words,
+            final TreeMap<Integer, Integer> frequencies,
+            final TreeMap<Integer, ArrayList<PendingAttribute>> bigrams)
+            throws IOException, UnsupportedFormatException {
+        if (mDictBuffer == null) {
+            openDictBuffer();
+        }
+        BinaryDictIOUtils.readUnigramsAndBigramsBinary(this, words, frequencies, bigrams);
+    }
+
 }
diff --git a/java/src/com/android/inputmethod/latin/utils/DictionaryInfoUtils.java b/java/src/com/android/inputmethod/latin/utils/DictionaryInfoUtils.java
index cec6dba..021bf08 100644
--- a/java/src/com/android/inputmethod/latin/utils/DictionaryInfoUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/DictionaryInfoUtils.java
@@ -27,10 +27,8 @@
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.makedict.BinaryDictIOUtils;
 import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
-import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
 
 import java.io.File;
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.Locale;
diff --git a/java/src/com/android/inputmethod/latin/utils/UserHistoryDictIOUtils.java b/java/src/com/android/inputmethod/latin/utils/UserHistoryDictIOUtils.java
index 9d3d8a5..99788f6 100644
--- a/java/src/com/android/inputmethod/latin/utils/UserHistoryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/UserHistoryDictIOUtils.java
@@ -32,7 +32,8 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
 
 /**
  * Reads and writes Binary files for a UserHistoryDictionary.
@@ -119,12 +120,11 @@
      */
     public static void readDictionaryBinary(final Ver3DictDecoder dictDecoder,
             final OnAddWordListener dict) {
-        final Map<Integer, String> unigrams = CollectionUtils.newTreeMap();
-        final Map<Integer, Integer> frequencies = CollectionUtils.newTreeMap();
-        final Map<Integer, ArrayList<PendingAttribute>> bigrams = CollectionUtils.newTreeMap();
+        final TreeMap<Integer, String> unigrams = CollectionUtils.newTreeMap();
+        final TreeMap<Integer, Integer> frequencies = CollectionUtils.newTreeMap();
+        final TreeMap<Integer, ArrayList<PendingAttribute>> bigrams = CollectionUtils.newTreeMap();
         try {
-            BinaryDictIOUtils.readUnigramsAndBigramsBinary(dictDecoder, unigrams, frequencies,
-                    bigrams);
+            dictDecoder.readUnigramsAndBigramsBinary(unigrams, frequencies, bigrams);
         } catch (IOException e) {
             Log.e(TAG, "IO exception while reading file", e);
         } catch (UnsupportedFormatException e) {
@@ -139,10 +139,11 @@
      * Adds all unigrams and bigrams in maps to OnAddWordListener.
      */
     @UsedForTesting
-    static void addWordsFromWordMap(final Map<Integer, String> unigrams,
-            final Map<Integer, Integer> frequencies,
-            final Map<Integer, ArrayList<PendingAttribute>> bigrams, final OnAddWordListener to) {
-        for (Map.Entry<Integer, String> entry : unigrams.entrySet()) {
+    static void addWordsFromWordMap(final TreeMap<Integer, String> unigrams,
+            final TreeMap<Integer, Integer> frequencies,
+            final TreeMap<Integer, ArrayList<PendingAttribute>> bigrams,
+            final OnAddWordListener to) {
+        for (Entry<Integer, String> entry : unigrams.entrySet()) {
             final String word1 = entry.getValue();
             final int unigramFrequency = frequencies.get(entry.getKey());
             to.setUnigram(word1, null, unigramFrequency);
diff --git a/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java b/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java
index bb5b96a..72ec5a3 100644
--- a/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java
+++ b/tests/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderEncoderTests.java
@@ -39,10 +39,10 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
-import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Random;
 import java.util.Set;
+import java.util.TreeMap;
 
 /**
  * Unit tests for BinaryDictDecoderUtils and BinaryDictEncoderUtils.
@@ -61,13 +61,13 @@
     private static final int USE_BYTE_ARRAY = 1;
     private static final int USE_BYTE_BUFFER = 2;
 
-    private static final List<String> sWords = CollectionUtils.newArrayList();
+    private static final ArrayList<String> sWords = CollectionUtils.newArrayList();
     private static final SparseArray<List<Integer>> sEmptyBigrams =
             CollectionUtils.newSparseArray();
     private static final SparseArray<List<Integer>> sStarBigrams = CollectionUtils.newSparseArray();
     private static final SparseArray<List<Integer>> sChainBigrams =
             CollectionUtils.newSparseArray();
-    private static final Map<String, List<String>> sShortcuts = CollectionUtils.newHashMap();
+    private static final HashMap<String, List<String>> sShortcuts = CollectionUtils.newHashMap();
 
     private static final FormatSpec.FormatOptions VERSION2 = new FormatSpec.FormatOptions(2);
     private static final FormatSpec.FormatOptions VERSION3_WITHOUT_DYNAMIC_UPDATE =
@@ -177,7 +177,7 @@
      * Adds unigrams to the dictionary.
      */
     private void addUnigrams(final int number, final FusionDictionary dict,
-            final List<String> words, final Map<String, List<String>> shortcutMap) {
+            final List<String> words, final HashMap<String, List<String>> shortcutMap) {
         for (int i = 0; i < number; ++i) {
             final String word = words.get(i);
             final ArrayList<WeightedString> shortcuts = CollectionUtils.newArrayList();
@@ -234,7 +234,8 @@
     }
 
     private void checkDictionary(final FusionDictionary dict, final List<String> words,
-            final SparseArray<List<Integer>> bigrams, final Map<String, List<String>> shortcutMap) {
+            final SparseArray<List<Integer>> bigrams,
+            final HashMap<String, List<String>> shortcutMap) {
         assertNotNull(dict);
 
         // check unigram
@@ -255,7 +256,7 @@
 
         // check shortcut
         if (shortcutMap != null) {
-            for (final Map.Entry<String, List<String>> entry : shortcutMap.entrySet()) {
+            for (final Entry<String, List<String>> entry : shortcutMap.entrySet()) {
                 assertTrue(words.contains(entry.getKey()));
                 final PtNode ptNode = FusionDictionary.findWordInTree(dict.mRootNodeArray,
                         entry.getKey());
@@ -278,8 +279,8 @@
     // Tests for readDictionaryBinary and writeDictionaryBinary
 
     private long timeReadingAndCheckDict(final File file, final List<String> words,
-            final SparseArray<List<Integer>> bigrams, final Map<String, List<String>> shortcutMap,
-            final int bufferType) {
+            final SparseArray<List<Integer>> bigrams,
+            final HashMap<String, List<String>> shortcutMap, final int bufferType) {
         long now, diff = -1;
 
         FusionDictionary dict = null;
@@ -302,7 +303,7 @@
 
     // Tests for readDictionaryBinary and writeDictionaryBinary
     private String runReadAndWrite(final List<String> words,
-            final SparseArray<List<Integer>> bigrams, final Map<String, List<String>> shortcuts,
+            final SparseArray<List<Integer>> bigrams, final HashMap<String, List<String>> shortcuts,
             final int bufferType, final FormatSpec.FormatOptions formatOptions,
             final String message) {
         File file = null;
@@ -387,9 +388,9 @@
 
     private void checkWordMap(final List<String> expectedWords,
             final SparseArray<List<Integer>> expectedBigrams,
-            final Map<Integer, String> resultWords,
-            final Map<Integer, Integer> resultFrequencies,
-            final Map<Integer, ArrayList<PendingAttribute>> resultBigrams) {
+            final TreeMap<Integer, String> resultWords,
+            final TreeMap<Integer, Integer> resultFrequencies,
+            final TreeMap<Integer, ArrayList<PendingAttribute>> resultBigrams) {
         // check unigrams
         final Set<String> actualWordsSet = new HashSet<String>(resultWords.values());
         final Set<String> expectedWordsSet = new HashSet<String>(expectedWords);
@@ -400,7 +401,7 @@
         }
 
         // check bigrams
-        final Map<String, List<String>> expBigrams = new HashMap<String, List<String>>();
+        final HashMap<String, List<String>> expBigrams = new HashMap<String, List<String>>();
         for (int i = 0; i < expectedBigrams.size(); ++i) {
             final String word1 = expectedWords.get(expectedBigrams.keyAt(i));
             for (int w2 : expectedBigrams.valueAt(i)) {
@@ -411,7 +412,7 @@
             }
         }
 
-        final Map<String, List<String>> actBigrams = new HashMap<String, List<String>>();
+        final HashMap<String, List<String>> actBigrams = new HashMap<String, List<String>>();
         for (Entry<Integer, ArrayList<PendingAttribute>> entry : resultBigrams.entrySet()) {
             final String word1 = resultWords.get(entry.getKey());
             final int unigramFreq = resultFrequencies.get(entry.getKey());
@@ -435,10 +436,10 @@
             final SparseArray<List<Integer>> bigrams, final int bufferType) {
         FileInputStream inStream = null;
 
-        final Map<Integer, String> resultWords = CollectionUtils.newTreeMap();
-        final Map<Integer, ArrayList<PendingAttribute>> resultBigrams =
+        final TreeMap<Integer, String> resultWords = CollectionUtils.newTreeMap();
+        final TreeMap<Integer, ArrayList<PendingAttribute>> resultBigrams =
                 CollectionUtils.newTreeMap();
-        final Map<Integer, Integer> resultFreqs = CollectionUtils.newTreeMap();
+        final TreeMap<Integer, Integer> resultFreqs = CollectionUtils.newTreeMap();
 
         long now = -1, diff = -1;
         try {
@@ -446,8 +447,7 @@
             dictDecoder.openDictBuffer();
             assertNotNull("Can't get buffer.", dictDecoder.getDictBuffer());
             now = System.currentTimeMillis();
-            BinaryDictIOUtils.readUnigramsAndBigramsBinary(dictDecoder, resultWords, resultFreqs,
-                    resultBigrams);
+            dictDecoder.readUnigramsAndBigramsBinary(resultWords, resultFreqs, resultBigrams);
             diff = System.currentTimeMillis() - now;
         } catch (IOException e) {
             Log.e(TAG, "IOException", e);
@@ -467,7 +467,7 @@
         return diff;
     }
 
-    private String runReadUnigramsAndBigramsBinary(final List<String> words,
+    private String runReadUnigramsAndBigramsBinary(final ArrayList<String> words,
             final SparseArray<List<Integer>> bigrams, final int bufferType,
             final FormatSpec.FormatOptions formatOptions, final String message) {
         File file = null;
@@ -496,8 +496,8 @@
                 + " : " + message + " : " + outputOptions(bufferType, formatOptions);
     }
 
-    private void runReadUnigramsAndBigramsTests(final List<String> results, final int bufferType,
-            final FormatSpec.FormatOptions formatOptions) {
+    private void runReadUnigramsAndBigramsTests(final ArrayList<String> results,
+            final int bufferType, final FormatSpec.FormatOptions formatOptions) {
         results.add(runReadUnigramsAndBigramsBinary(sWords, sEmptyBigrams, bufferType,
                 formatOptions, "unigram"));
         results.add(runReadUnigramsAndBigramsBinary(sWords, sChainBigrams, bufferType,
@@ -507,7 +507,7 @@
     }
 
     public void testReadUnigramsAndBigramsBinaryWithByteBuffer() {
-        final List<String> results = CollectionUtils.newArrayList();
+        final ArrayList<String> results = CollectionUtils.newArrayList();
 
         runReadUnigramsAndBigramsTests(results, USE_BYTE_BUFFER, VERSION2);
         runReadUnigramsAndBigramsTests(results, USE_BYTE_BUFFER, VERSION3_WITHOUT_DYNAMIC_UPDATE);
@@ -519,7 +519,7 @@
     }
 
     public void testReadUnigramsAndBigramsBinaryWithByteArray() {
-        final List<String> results = CollectionUtils.newArrayList();
+        final ArrayList<String> results = CollectionUtils.newArrayList();
 
         runReadUnigramsAndBigramsTests(results, USE_BYTE_ARRAY, VERSION2);
         runReadUnigramsAndBigramsTests(results, USE_BYTE_ARRAY, VERSION3_WITHOUT_DYNAMIC_UPDATE);
diff --git a/tests/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtilsTests.java b/tests/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtilsTests.java
index 7a6708b..8e0c6df 100644
--- a/tests/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtilsTests.java
@@ -22,8 +22,6 @@
 import android.util.Log;
 
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
-import com.android.inputmethod.latin.makedict.DictDecoder.
-        DictionaryBufferFromWritableByteBufferFactory;
 import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
 import com.android.inputmethod.latin.makedict.FusionDictionary.PtNodeArray;
 import com.android.inputmethod.latin.makedict.FusionDictionary.WeightedString;
@@ -128,6 +126,7 @@
         }
     }
 
+    @SuppressWarnings("unused")
     private static void printBinaryFile(final Ver3DictDecoder dictDecoder)
             throws IOException, UnsupportedFormatException {
         final FileHeader fileHeader = dictDecoder.readHeader();