Merge "Add EmojiKeyboardView"

2013-08-28 11:22:40 +00:00 · 2013-08-28 11:22:40 +00:00 · 2a084e88a7
parent fe87f5f417 8ac0eb59e1
commit 2a084e88a7
7 changed files with 551 additions and 0 deletions
--- a/java/res/layout/emoji_keyboard_page.xml
+++ b/java/res/layout/emoji_keyboard_page.xml
@ -0,0 +1,33 @@
+<?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.
+*/
+-->
+
+<com.android.inputmethod.keyboard.internal.ScrollViewWithNotifier
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/emoji_keyboard_scroller"
+    android:clipToPadding="false"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+>
+    <com.android.inputmethod.keyboard.internal.ScrollKeyboardView
+        android:id="@+id/emoji_keyboard_page"
+        android:layoutDirection="ltr"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" />
+</com.android.inputmethod.keyboard.internal.ScrollViewWithNotifier>
--- a/java/res/layout/emoji_keyboard_tab_icon.xml
+++ b/java/res/layout/emoji_keyboard_tab_icon.xml
@ -0,0 +1,26 @@
+<?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.
+*/
+-->
+
+<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="0dip"
+    android:layout_weight="1.0"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+/>
--- a/java/res/layout/emoji_keyboard_tab_label.xml
+++ b/java/res/layout/emoji_keyboard_tab_label.xml
@ -0,0 +1,26 @@
+<?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.
+*/
+-->
+
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="0dip"
+    android:layout_weight="1.0"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+/>
--- a/java/res/layout/emoji_keyboard_view.xml
+++ b/java/res/layout/emoji_keyboard_view.xml
@ -0,0 +1,94 @@
+<?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.
+*/
+-->
+
+<com.android.inputmethod.keyboard.EmojiKeyboardView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/emoji_keyboard_view"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    style="?attr/emojiKeyboardViewStyle"
+>
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/suggestions_strip_height"
+    >
+        <TabHost
+            android:id="@+id/emoji_category_tabhost"
+            android:layout_width="0dip"
+            android:layout_weight="87.5"
+            android:layout_height="match_parent"
+        >
+            <TabWidget
+                android:id="@android:id/tabs"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@drawable/tab_selected"
+                android:divider="@null"
+                android:tabStripEnabled="true"
+                android:tabStripLeft="@drawable/tab_unselected"
+                android:tabStripRight="@drawable/tab_unselected" />
+            <FrameLayout
+                android:id="@android:id/tabcontent"
+                android:layout_width="0dip"
+                android:layout_height="0dip"
+            >
+                <!-- Empty placeholder that TabHost requires. But we don't use it to actually
+                     display anything. We monitor the tab changes and change the ViewPager.
+                     Similarly the ViewPager swipes are intercepted and passed to the TabHost. -->
+                <View
+                    android:id="@+id/emoji_keyboard_dummy"
+                    android:layout_width="0dip"
+                    android:layout_height="0dip"
+                    android:visibility="gone" />
+            </FrameLayout>
+        </TabHost>
+        <ImageButton
+            android:id="@+id/emoji_keyboard_delete"
+            android:layout_width="0dip"
+            android:layout_weight="12.5"
+            android:layout_height="match_parent"
+            android:src="@drawable/sym_keyboard_delete_holo" />
+    </LinearLayout>
+    <android.support.v4.view.ViewPager
+        android:id="@+id/emoji_keyboard_pager"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+    <LinearLayout
+        android:id="@+id/emoji_action_bar"
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/suggestions_strip_height"
+    >
+        <ImageButton
+            android:id="@+id/emoji_keyboard_alphabet"
+            android:layout_width="0dip"
+            android:layout_weight="0.825"
+            android:layout_height="match_parent"
+            android:src="@drawable/ic_ime_light" />
+        <ImageButton
+            android:id="@+id/emoji_keyboard_send"
+            android:layout_width="0dip"
+            android:layout_weight="0.125"
+            android:layout_height="match_parent"
+            android:src="@drawable/sym_keyboard_return_holo" />
+    </LinearLayout>
+</com.android.inputmethod.keyboard.EmojiKeyboardView>
--- a/java/res/xml/kbd_emoji_category6.xml
+++ b/java/res/xml/kbd_emoji_category6.xml
@ -22,6 +22,7 @@
    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
    latin:keyWidth="@fraction/emoji_keyboard_key_width"
    latin:keyLetterSize="90%p"
+    latin:keyLabelSize="60%p"
 >
    <GridRows
        latin:textsArray="@array/emoji_emoticons"
--- a/java/res/xml/kbd_emoji_recents.xml
+++ b/java/res/xml/kbd_emoji_recents.xml
@ -22,6 +22,7 @@
    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
    latin:keyWidth="@fraction/emoji_keyboard_key_width"
    latin:keyLetterSize="90%p"
+    latin:keyLabelSize="60%p"
 >
    <GridRows
        latin:codesArray="@array/emoji_recents"
--- a/java/src/com/android/inputmethod/keyboard/EmojiKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/EmojiKeyboardView.java
@ -0,0 +1,370 @@
+/*
+ * 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;
+
+import static com.android.inputmethod.latin.Constants.NOT_A_COORDINATE;
+
+import android.content.Context;
+import android.content.res.ColorStateList;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.support.v4.view.PagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.util.AttributeSet;
+import android.util.SparseArray;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TabHost;
+import android.widget.TabHost.OnTabChangeListener;
+import android.widget.TextView;
+
+import com.android.inputmethod.keyboard.internal.RecentsKeyboard;
+import com.android.inputmethod.keyboard.internal.ScrollKeyboardView;
+import com.android.inputmethod.keyboard.internal.ScrollViewWithNotifier;
+import com.android.inputmethod.latin.Constants;
+import com.android.inputmethod.latin.R;
+import com.android.inputmethod.latin.SubtypeSwitcher;
+import com.android.inputmethod.latin.utils.CollectionUtils;
+import com.android.inputmethod.latin.utils.ResourceUtils;
+
+import java.util.HashMap;
+
+/**
+ * View class to implement Emoji keyboards.
+ * The Emoji keyboard consists of group of views {@link R.layout#emoji_keyboard_view}.
+ * <ol>
+ * <li> Emoji category tabs.
+ * <li> Delete button.
+ * <li> Emoji keyboard pages that can be scrolled by swiping horizontally or by selecting a tab.
+ * <li> Back to main keyboard button and enter button.
+ * </ol>
+ * Because of the above reasons, this class doesn't extend {@link KeyboardView}.
+ */
+public final class EmojiKeyboardView extends LinearLayout implements OnTabChangeListener,
+        ViewPager.OnPageChangeListener, View.OnClickListener,
+        ScrollKeyboardView.OnKeyClickListener {
+    private final int mKeyBackgroundId;
+    private final ColorStateList mTabLabelColor;
+    private final EmojiKeyboardAdapter mEmojiKeyboardAdapter;
+
+    private TabHost mTabHost;
+    private ViewPager mEmojiPager;
+
+    private KeyboardActionListener mKeyboardActionListener = KeyboardActionListener.EMPTY_LISTENER;
+
+    private int mCurrentCategory = CATEGORY_UNSPECIFIED;
+    private static final int CATEGORY_UNSPECIFIED = -1;
+    private static final int CATEGORY_RECENTS = 0;
+    private static final int CATEGORY_PEOPLE = 1;
+    private static final int CATEGORY_OBJECTS = 2;
+    private static final int CATEGORY_NATURE = 3;
+    private static final int CATEGORY_PLACES = 4;
+    private static final int CATEGORY_SYMBOLS = 5;
+    private static final int CATEGORY_EMOTICONS = 6;
+    private static final HashMap<String, Integer> sCategoryNameToIdMap =
+            CollectionUtils.newHashMap();
+    private static final String[] sCategoryName = {
+        "recents", "people", "objects", "nature", "places", "symbols", "emoticons"
+    };
+    private static final int[] sCategoryIcon = new int[] {
+        R.drawable.ic_emoji_recent_light,
+        R.drawable.ic_emoji_people_light,
+        R.drawable.ic_emoji_objects_light,
+        R.drawable.ic_emoji_nature_light,
+        R.drawable.ic_emoji_places_light,
+        R.drawable.ic_emoji_symbols_light,
+        0
+    };
+    private static final String[] sCategoryLabel = {
+        null, null, null, null, null, null,
+        ":-)"
+    };
+    private static final int[] sCategoryElementId = {
+        KeyboardId.ELEMENT_EMOJI_RECENTS,
+        KeyboardId.ELEMENT_EMOJI_CATEGORY1,
+        KeyboardId.ELEMENT_EMOJI_CATEGORY2,
+        KeyboardId.ELEMENT_EMOJI_CATEGORY3,
+        KeyboardId.ELEMENT_EMOJI_CATEGORY4,
+        KeyboardId.ELEMENT_EMOJI_CATEGORY5,
+        KeyboardId.ELEMENT_EMOJI_CATEGORY6,
+    };
+
+    public EmojiKeyboardView(final Context context, final AttributeSet attrs) {
+        this(context, attrs, R.attr.emojiKeyboardViewStyle);
+    }
+
+    public EmojiKeyboardView(final Context context, final AttributeSet attrs, final int defStyle) {
+        super(context, attrs, defStyle);
+        final TypedArray keyboardViewAttr = context.obtainStyledAttributes(attrs,
+                R.styleable.KeyboardView, defStyle, R.style.KeyboardView);
+        mKeyBackgroundId = keyboardViewAttr.getResourceId(
+                R.styleable.KeyboardView_keyBackground, 0);
+        keyboardViewAttr.recycle();
+        final TypedArray emojiKeyboardViewAttr = context.obtainStyledAttributes(attrs,
+                R.styleable.EmojiKeyboardView, defStyle, R.style.EmojiKeyboardView);
+        mTabLabelColor = emojiKeyboardViewAttr.getColorStateList(
+                R.styleable.EmojiKeyboardView_emojiTabLabelColor);
+        emojiKeyboardViewAttr.recycle();
+        final KeyboardLayoutSet.Builder builder = new KeyboardLayoutSet.Builder(
+                context, null /* editorInfo */);
+        final Resources res = context.getResources();
+        builder.setSubtype(SubtypeSwitcher.getInstance().getEmojiSubtype());
+        // TODO: Make Keyboard height variable.
+        builder.setKeyboardGeometry(ResourceUtils.getDefaultKeyboardWidth(res),
+                (int)(ResourceUtils.getDefaultKeyboardHeight(res)
+                        - res.getDimension(R.dimen.suggestions_strip_height)));
+        builder.setOptions(false, false, false /* lanuageSwitchKeyEnabled */);
+        final KeyboardLayoutSet layoutSet = builder.build();
+        mEmojiKeyboardAdapter = new EmojiKeyboardAdapter(layoutSet, this);
+        // TODO: Save/restore recent keys from/to preferences.
+    }
+
+    @Override
+    protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        final Resources res = getContext().getResources();
+        // The main keyboard expands to the entire this {@link KeyboardView}.
+        final int width = ResourceUtils.getDefaultKeyboardWidth(res)
+                + getPaddingLeft() + getPaddingRight();
+        final int height = ResourceUtils.getDefaultKeyboardHeight(res)
+                + res.getDimensionPixelSize(R.dimen.suggestions_strip_height)
+                + getPaddingTop() + getPaddingBottom();
+        setMeasuredDimension(width, height);
+    }
+
+    private void addTab(final TabHost host, final int category) {
+        final String tabId = sCategoryName[category];
+        sCategoryNameToIdMap.put(tabId, category);
+        final TabHost.TabSpec tspec = host.newTabSpec(tabId);
+        tspec.setContent(R.id.emoji_keyboard_dummy);
+        if (sCategoryIcon[category] != 0) {
+            final ImageView iconView = (ImageView)LayoutInflater.from(getContext()).inflate(
+                    R.layout.emoji_keyboard_tab_icon, null);
+            iconView.setImageResource(sCategoryIcon[category]);
+            tspec.setIndicator(iconView);
+        }
+        if (sCategoryLabel[category] != null) {
+            final TextView textView = (TextView)LayoutInflater.from(getContext()).inflate(
+                    R.layout.emoji_keyboard_tab_label, null);
+            textView.setText(sCategoryLabel[category]);
+            textView.setTextColor(mTabLabelColor);
+            textView.setBackgroundResource(mKeyBackgroundId);
+            tspec.setIndicator(textView);
+        }
+        host.addTab(tspec);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        mTabHost = (TabHost)findViewById(R.id.emoji_category_tabhost);
+        mTabHost.setup();
+        addTab(mTabHost, CATEGORY_RECENTS);
+        addTab(mTabHost, CATEGORY_PEOPLE);
+        addTab(mTabHost, CATEGORY_OBJECTS);
+        addTab(mTabHost, CATEGORY_NATURE);
+        addTab(mTabHost, CATEGORY_PLACES);
+        addTab(mTabHost, CATEGORY_SYMBOLS);
+        addTab(mTabHost, CATEGORY_EMOTICONS);
+        mTabHost.setOnTabChangedListener(this);
+        mTabHost.getTabWidget().setStripEnabled(true);
+
+        mEmojiPager = (ViewPager)findViewById(R.id.emoji_keyboard_pager);
+        mEmojiPager.setAdapter(mEmojiKeyboardAdapter);
+        mEmojiPager.setOnPageChangeListener(this);
+        mEmojiPager.setOffscreenPageLimit(0);
+        final ViewGroup.LayoutParams lp = mEmojiPager.getLayoutParams();
+        final Resources res = getResources();
+        lp.height = ResourceUtils.getDefaultKeyboardHeight(res)
+                - res.getDimensionPixelSize(R.dimen.suggestions_strip_height);
+        mEmojiPager.setLayoutParams(lp);
+
+        // TODO: Record current category.
+        final int category = CATEGORY_PEOPLE;
+        setCurrentCategory(category, true /* force */);
+
+        // TODO: Implement auto repeat, using View.OnTouchListener?
+        final View deleteKey = findViewById(R.id.emoji_keyboard_delete);
+        deleteKey.setBackgroundResource(mKeyBackgroundId);
+        deleteKey.setTag(Constants.CODE_DELETE);
+        deleteKey.setOnClickListener(this);
+        final View alphabetKey = findViewById(R.id.emoji_keyboard_alphabet);
+        alphabetKey.setBackgroundResource(mKeyBackgroundId);
+        alphabetKey.setTag(Constants.CODE_SWITCH_ALPHA_SYMBOL);
+        alphabetKey.setOnClickListener(this);
+        final View sendKey = findViewById(R.id.emoji_keyboard_send);
+        sendKey.setBackgroundResource(mKeyBackgroundId);
+        sendKey.setTag(Constants.CODE_ENTER);
+        sendKey.setOnClickListener(this);
+    }
+
+    @Override
+    public void onTabChanged(final String tabId) {
+        final int category = sCategoryNameToIdMap.get(tabId);
+        setCurrentCategory(category, false /* force */);
+    }
+
+
+    @Override
+    public void onPageSelected(final int position) {
+        setCurrentCategory(position, false /* force */);
+    }
+
+    @Override
+    public void onPageScrollStateChanged(final int state) {
+        // Ignore this message. Only want the actual page selected.
+    }
+
+    @Override
+    public void onPageScrolled(final int position, final float positionOffset,
+            final int positionOffsetPixels) {
+        // Ignore this message. Only want the actual page selected.
+    }
+
+    @Override
+    public void onClick(final View v) {
+        if (v.getTag() instanceof Integer) {
+            final int code = (Integer)v.getTag();
+            registerCode(code);
+            return;
+        }
+    }
+
+    private void registerCode(final int code) {
+        mKeyboardActionListener.onPressKey(code, 0 /* repeatCount */, true /* isSinglePointer */);
+        mKeyboardActionListener.onCodeInput(code, NOT_A_COORDINATE, NOT_A_COORDINATE);
+        mKeyboardActionListener.onReleaseKey(code, false /* withSliding */);
+    }
+
+    @Override
+    public void onKeyClick(final Key key) {
+        mEmojiKeyboardAdapter.addRecentKey(key);
+        final int code = key.getCode();
+        if (code == Constants.CODE_OUTPUT_TEXT) {
+            mKeyboardActionListener.onTextInput(key.getOutputText());
+            return;
+        }
+        registerCode(code);
+    }
+
+    public void setHardwareAcceleratedDrawingEnabled(final boolean enabled) {
+        // TODO:
+    }
+
+    public void setKeyboardActionListener(final KeyboardActionListener listener) {
+        mKeyboardActionListener = listener;
+    }
+
+    private void setCurrentCategory(final int category, final boolean force) {
+        if (mCurrentCategory == category && !force) {
+            return;
+        }
+
+        mCurrentCategory = category;
+        if (force || mEmojiPager.getCurrentItem() != category) {
+            mEmojiPager.setCurrentItem(category, true /* smoothScroll */);
+        }
+        if (force || mTabHost.getCurrentTab() != category) {
+            mTabHost.setCurrentTab(category);
+        }
+        // TODO: Record current category
+    }
+
+    private static class EmojiKeyboardAdapter extends PagerAdapter {
+        private final ScrollKeyboardView.OnKeyClickListener mListener;
+        private final KeyboardLayoutSet mLayoutSet;
+        private final RecentsKeyboard mRecentsKeyboard;
+        private final SparseArray<ScrollKeyboardView> mActiveKeyboardView =
+                CollectionUtils.newSparseArray();
+        private int mActivePosition = CATEGORY_UNSPECIFIED;
+
+        public EmojiKeyboardAdapter(final KeyboardLayoutSet layoutSet,
+                final ScrollKeyboardView.OnKeyClickListener listener) {
+            mListener = listener;
+            mLayoutSet = layoutSet;
+            mRecentsKeyboard = new RecentsKeyboard(
+                    layoutSet.getKeyboard(KeyboardId.ELEMENT_EMOJI_RECENTS));
+        }
+
+        public void addRecentKey(final Key key) {
+            if (mActivePosition == CATEGORY_RECENTS) {
+                return;
+            }
+            mRecentsKeyboard.addRecentKey(key);
+            final KeyboardView recentKeyboardView = mActiveKeyboardView.get(CATEGORY_RECENTS);
+            if (recentKeyboardView != null) {
+                recentKeyboardView.invalidateAllKeys();
+            }
+        }
+
+        @Override
+        public int getCount() {
+            return sCategoryName.length;
+        }
+
+        @Override
+        public void setPrimaryItem(final View container, final int position, final Object object) {
+            if (mActivePosition == position) {
+                return;
+            }
+            final ScrollKeyboardView oldKeyboardView = mActiveKeyboardView.get(mActivePosition);
+            if (oldKeyboardView != null) {
+                oldKeyboardView.releaseCurrentKey();
+                oldKeyboardView.deallocateMemory();
+            }
+            mActivePosition = position;
+        }
+
+        @Override
+        public Object instantiateItem(final ViewGroup container, final int position) {
+            final int elementId = sCategoryElementId[position];
+            final Keyboard keyboard = (elementId == KeyboardId.ELEMENT_EMOJI_RECENTS)
+                    ? mRecentsKeyboard : mLayoutSet.getKeyboard(elementId);
+            final LayoutInflater inflater = LayoutInflater.from(container.getContext());
+            final View view = inflater.inflate(
+                    R.layout.emoji_keyboard_page, container, false /* attachToRoot */);
+            final ScrollKeyboardView keyboardView = (ScrollKeyboardView)view.findViewById(
+                    R.id.emoji_keyboard_page);
+            keyboardView.setKeyboard(keyboard);
+            keyboardView.setOnKeyClickListener(mListener);
+            final ScrollViewWithNotifier scrollView = (ScrollViewWithNotifier)view.findViewById(
+                    R.id.emoji_keyboard_scroller);
+            keyboardView.setScrollView(scrollView);
+            container.addView(view);
+            mActiveKeyboardView.put(position, keyboardView);
+            return view;
+        }
+
+        @Override
+        public boolean isViewFromObject(final View view, final Object object) {
+            return view == object;
+        }
+
+        @Override
+        public void destroyItem(final ViewGroup container, final int position,
+                final Object object) {
+            final ScrollKeyboardView keyboardView = mActiveKeyboardView.get(position);
+            if (keyboardView != null) {
+                keyboardView.deallocateMemory();
+                mActiveKeyboardView.remove(position);
+            }
+            container.removeView(keyboardView);
+        }
+    }
+}